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Bettinger CM, Dulz S, Atiskova Y, Guerreiro H, Schön G, Guder P, Maier SL, Denecke J, Bley AE. Overview of Neuro-Ophthalmic Findings in Leukodystrophies. J Clin Med 2024; 13:5114. [PMID: 39274327 PMCID: PMC11396446 DOI: 10.3390/jcm13175114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 08/10/2024] [Accepted: 08/13/2024] [Indexed: 09/16/2024] Open
Abstract
Background: Leukodystrophies are a group of rare genetic diseases that primarily affect the white matter of the central nervous system. The broad spectrum of metabolic and pathological causes leads to manifestations at any age, most often in childhood and adolescence, and a variety of symptoms. Leukodystrophies are usually progressive, resulting in severe disabilities and premature death. Progressive visual impairment is a common symptom. Currently, no overview of the manifold neuro-ophthalmologic manifestations and visual impact of leukodystrophies exists. Methods: Data from 217 patients in the Hamburg leukodystrophy cohort were analyzed retrospectively for neuro-ophthalmologic manifestations, age of disease onset, and magnetic resonance imaging, visual evoked potential, and optical coherence tomography findings and were compared with data from the literature. Results: In total, 68% of the patients suffered from neuro-ophthalmologic symptoms, such as optic atrophy, visual neglect, strabismus, and nystagmus. Depending on the type of leukodystrophy, neuro-ophthalmologic symptoms occurred early or late during the course of the disease. Magnetic resonance imaging scans revealed pathologic alterations in the visual tract that were temporally correlated with symptoms. Conclusions: The first optical coherence tomography findings in Krabbe disease and metachromatic leukodystrophy allow retinal assessments. Comprehensive literature research supports the results of this first overview of neuro-ophthalmologic findings in leukodystrophies.
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Affiliation(s)
| | - Simon Dulz
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Yevgeniya Atiskova
- Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Gerhard Schön
- Center of Experimental Medicine, Institute for Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Philipp Guder
- Children's Hospital, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Sarah Lena Maier
- Children's Hospital, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Jonas Denecke
- Children's Hospital, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Annette E Bley
- Children's Hospital, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
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2
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Escobar-Pacheco M, Luna-Álvarez M, Dávila-Ortiz de Montellano D, Yescas-Gómez P, Ramírez-García MÁ. Ovarioleukodystrophy Due to EIF2B Genes: Systematic Review and Case Report. Cureus 2024; 16:e64497. [PMID: 39139316 PMCID: PMC11319890 DOI: 10.7759/cureus.64497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2024] [Indexed: 08/15/2024] Open
Abstract
Leukodystrophies comprise a spectrum of genetic disorders affecting white matter (WM) formation in the central nervous system (CNS), of which vanishing white matter disease (VWMD) is one. VWMD presents with progressive neurological deterioration and a variety of manifestations. Ovarioleukodystrophy, a subtype of VWMD, exhibits a distinctive clinical profile encompassing both CNS WM alterations and ovarian dysfunction. Variants in genes of the eukaryotic translation initiation factor 2B (EIF2B) complex affect the full form and are implicated in VWMD, including ovarioleukodystrophy. This work aimed to systematically review all published cases of ovarioleukodystrophy associated with variants in the EIF2B1-5 gene complex based on the first case identified in a Mexican population. We performed a systematic review according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines of published cases of ovarioleukodystrophy associated with the EIF2B gene complex, including a newly identified case from Mexico. We identified 207 publications using PUBMED, SCOPUS, and PMC databases. One hundred fifty-one publications were eliminated due to duplicates, titles, abstracts, or other reasons, while 56 publications were revised, of which 29 were eliminated because they dealt with other genes or non-human research, and 27 reports were assessed for eligibility. Finally, 14 reports describing ovarian involvement, neuroimaging, and molecular variants were included. Our review identified 20 cases worldwide, with a median age of onset of 19 years. Clinical features included WM involvement, ovarian abnormalities, gait disturbances, epilepsy, cognitive and language impairment, and other neurological manifestations. Neuroimaging showed characteristic WM changes, highlighting the importance of MRI in diagnosis. Missense variants predominated among the identified genetic mutations, especially in the EIF2B4 and EIF2B5 genes. Ovarioleukodystrophy is an ultra-rare disorder with a wide range of clinical manifestations and ovarian changes. Gynecological evaluation is crucial in suspected cases of ovarioleukodystrophy, as ovarian manifestations may precede neurological symptoms. The role of MRI is crucial in the diagnostic approach to this entity. Continued collaborative efforts are essential to elucidate genotype-phenotype correlations, improve clinical management, and promote therapeutic advances for this rare disorder.
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Affiliation(s)
- Mariana Escobar-Pacheco
- Genetics, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Mexico City, MEX
| | - Mariana Luna-Álvarez
- Genetics, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Mexico City, MEX
- Genetics, National Institute of Pediatrics, Mexico City, MEX
| | | | - Petra Yescas-Gómez
- Genetics, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Mexico City, MEX
| | - Miguel Á Ramírez-García
- Genetics, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Mexico City, MEX
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3
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Zhang Y, Wei T, Yu H, Li W, Luo W, Liu B. Neuroimaging and clinical features of bilateral Wallerian degeneration of middle cerebellar peduncles subsequent to pontine infarction. CNS Neurosci Ther 2024; 30:e14828. [PMID: 38946709 PMCID: PMC11215464 DOI: 10.1111/cns.14828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 06/02/2024] [Accepted: 06/21/2024] [Indexed: 07/02/2024] Open
Abstract
OBJECTIVE Wallerian degeneration (WD) of the middle cerebellar peduncles (MCPs) following pontine infarction is a rare secondary degenerative neurological condition. Due to its infrequency, there is limited research on its characteristics. METHODS This study aims to present three cases of WD of MCPs following pontine infarction and to analyze the prognosis, clinical manifestations, and neuroimaging features by amalgamating our cases with previously reported ones. RESULTS The cohort consisted of 25 cases, comprising 18 men and 7 women aged 29 to 77 years (mean age: 66.2 years). The majority of patients (94%) exhibit risk factors for cerebrovascular disease, with hypertension being the primary risk factor. Magnetic resonance imaging (MRI) can detect WD of MCPs within a range of 21 days to 12 months following pontine infarction. This degeneration is characterized by bilateral symmetric hyperintensities on T2/FLAIR-weighted images (WI) lesions in the MCPs. Moreover, restricted diffusion, with hyperintensity on diffusion-weighted imaging (DWI) and low apparent diffusion coefficient (ADC) signal intensity may be observed as early as 21 days after the infarction. Upon detection of WD, it was observed that 20 patients (80%) remained asymptomatic during subsequent clinic visits, while four (16%) experienced a worsening of pre-existing symptoms. CONCLUSIONS These findings underscore the importance of neurologists enhancing their understanding of this condition by gaining fresh insights into the neuroimaging characteristics, clinical manifestations, and prognosis of individuals with WD of bilateral MCPs.
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Affiliation(s)
- Yao Zhang
- Department of NeurologyThe First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan HospitalJinanChina
| | - Ting Wei
- Department of NeurologyThe First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan HospitalJinanChina
| | - Hui Yu
- Department of Neurology, Shandong Provincial Qianfoshan Hospital, School of Clinical MedicineWeifang Medical UniversityWeifangChina
| | - Wenli Li
- Department of NeurologyThe First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan HospitalJinanChina
| | - Wenqian Luo
- Department of NeurologyThe First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan HospitalJinanChina
| | - Bin Liu
- Department of NeurologyThe First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan HospitalJinanChina
- Shandong Institute of NeuroimmunologyJinanChina
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4
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Mandler JM, Härtl J, Cordts I, Sturm M, Hedderich DM, Bafligil C, Baki E, Becker B, Machetanz G, Haack TB, Berthele A, Hemmer B, Deschauer M. Uncovering genetic mimics in multiple sclerosis: A single-center clinical exome sequencing study. Mult Scler J Exp Transl Clin 2024; 10:20552173241263491. [PMID: 39072298 PMCID: PMC11273569 DOI: 10.1177/20552173241263491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 06/05/2024] [Indexed: 07/30/2024] Open
Abstract
Background Multiple sclerosis (MS) shares clinical/radiological features with several monogenic diseases that can mimic MS. Objective We aimed to determine if exome sequencing can identify monogenic diseases in patients diagnosed with MS according to the McDonald criteria thus uncovering them as being misdiagnosed. Methods We performed whole exome sequencing in a cohort of 278 patients with MS, clinically or radiologically isolated syndrome without cerebrospinal fluid-specific oligoclonal bands (CSF-OCBs) (n = 228), a positive family history of MS (n = 44), or both (n = 6), thereby focusing on individuals potentially more likely to have underlying monogenic conditions mimicking MS. We prioritized 495 genes associated with monogenic diseases sharing features with MS. Results A disease-causing variant in NOTCH3 was identified in one patient without CSF-OCBs, no spinal lesions, with non-response to immunotherapy, and a family history of dementia, thereby converting the diagnosis to cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). Moreover, 18 patients (6.5% of total) carried variants of unclear significance. Conclusion Monogenic diseases being misdiagnosed as MS seem rare in patients diagnosed with MS according to the McDonald criteria, even in CSF-OCB negative cases. The detected pathogenic NOTCH3 variant emphasizes CADASIL as a rare differential diagnosis and highlights the relevance of genetic testing in selected MS cases with atypical presentations.
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Affiliation(s)
- Julia M Mandler
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Johanna Härtl
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Isabell Cordts
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Marc Sturm
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Dennis M Hedderich
- Department of Neuroradiology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Cemsel Bafligil
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Enayatullah Baki
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Benedikt Becker
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Gerrit Machetanz
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
- Centre for Rare Diseases, University of Tübingen, Tübingen, Germany
| | - Achim Berthele
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
| | - Bernhard Hemmer
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Marcus Deschauer
- Department of Neurology, Klinikum rechts der Isar, School of Medicine and Health, Technical University of Munich, München, Germany
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5
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Kang Y, Guo L, Min Z, Zhang L, Zhang L, Tang C. Brainstem dominant form of X-linked adrenoleukodystrophy with a novel ABCD1 missense variant: A case report and literature review. Mol Genet Genomic Med 2024; 12:e2499. [PMID: 39051462 PMCID: PMC11270050 DOI: 10.1002/mgg3.2499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 07/15/2024] [Accepted: 07/18/2024] [Indexed: 07/27/2024] Open
Abstract
BACKGROUND X-linked adrenoleukodystrophy (X-ALD) is the most common peroxisomal disorder attributed to ABCD1 mutations. Case reports with predominant brainstem involvement are rare. CASE PRESENTATION In this study, we reported a plateau male worker of X-ALD characterized by progressive weakness accompanied by gait instability, mild nystagmus, and constipation. After 2 years of onset, a brain Magnetic Resonance Image (MRI) scan showed no abnormality but genetic analysis revealed a heterozygous mutation (c.1534G>A) in the ABCD1 gene. After 7 years of onset, although the patient was given aggressive dietary and symptomatic treatment in the course of the disease, a brain MRI scan showed predominantly brainstem damage, but serum concentrations of very long-chain fatty acids were normal, and he had been bedridden for almost 2 years with severe bladder dysfunction, forcing him to undergo cystostomy. The patient was discharged with improved urinary retention and renal function. CONCLUSIONS We reported an X-ALD patient with a novel ABCD1 variation characterized by brainstem damage and retrospectively summarized the clinical manifestation, MRI features, and genetic features of X-ALD patients with brainstem damage.
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Affiliation(s)
- Yulai Kang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
| | - Lu Guo
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
| | - Zhuo Min
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
| | - Lei Zhang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
| | - Lili Zhang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
| | - Chunhua Tang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Army Medical Centre of PLAArmy Medical UniversityChongqingChina
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6
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Zhang Y, Wu ZY. Chinese patients with adult onset leukodystrophy caused by CST3 variants. J Genet Genomics 2024; 51:778-780. [PMID: 38729262 DOI: 10.1016/j.jgg.2024.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/05/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Affiliation(s)
- Yi Zhang
- Department of Medical Genetics and Center for Rare Diseases, Zhejiang Key Laboratory of Rare Diseases for Precision Medicine and Clinical Translation, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; Nanhu Brain-computer Interface Institute, Hangzhou, Zhejiang 314050, China; Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Zhi-Ying Wu
- Department of Medical Genetics and Center for Rare Diseases, Zhejiang Key Laboratory of Rare Diseases for Precision Medicine and Clinical Translation, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; Nanhu Brain-computer Interface Institute, Hangzhou, Zhejiang 314050, China; Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; MOE Frontier Science Center for Brain Science and Brain-machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310012, China.
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7
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Gui M, He M, Qin L. Adult-onset leukoencephalopathy with vanishing white matter with compound heterozygous EIF2B3 gene variants. BMC Neurol 2024; 24:201. [PMID: 38872124 PMCID: PMC11170766 DOI: 10.1186/s12883-024-03721-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024] Open
Abstract
BACKGROUND Leukoencephalopathy with vanishing white matter (VWM) is an autosomal recessive disorder affecting the white matter of the brain. It typically manifests during childhood, with clinical features including sudden and severe neurological deterioration triggered by stressors such as febrile illness, minor head trauma, or stressful events. Adult-onset cases of VWM are exceptionally uncommon. CASE PRESENTATION In this case, we present an adult patient who exhibited late-onset progressive VWM characterized by ataxia, postural instability, cognitive impairment, and emotional disturbances. Comprehensive screening for endocrine, metabolic, tumor, and immunologic disorders yielded normal or negative results. Brain imaging revealed diffuse and confluent hyperintensity in the white matter on T2-weighted images, along with periventricular cavitations. Genetic testing confirmed the diagnosis of VWM, identifying two heterozygous variants in the eukaryotic translation initiation factor 2B subunit γ (EIF2B3) gene: a pathogenic variant, c.1037 T > C (p.I346T), and a variant of undetermined significance, c.22A > T (p.M8L). Upon a 2-year follow-up, the patient's symptoms deteriorated rapidly following a COVID-19 infection. CONCLUSIONS In conclusion, we have presented a case of classical adult-onset VWM. Since there are no cures or definitive treatments for the disease, it's extremely important to focus on early diagnosis and the prevention of stressors to avoid acute deterioration.
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Affiliation(s)
- Meilin Gui
- Department of Neurology, The Second Xiangya Hospital, Central South University, 139# Renmin Road, Changsha, Hunan, 410011, China
| | - Miao He
- Department of Neurology, The Second Xiangya Hospital, Central South University, 139# Renmin Road, Changsha, Hunan, 410011, China
| | - Lixia Qin
- Department of Neurology, The Second Xiangya Hospital, Central South University, 139# Renmin Road, Changsha, Hunan, 410011, China.
- National Clinical Research Center On Mental Disorders, Changsha, Hunan, China.
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8
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Xu W, Chen K, Yuan Y, Guo M, Dong Q, Cui M. Ring finger protein 216 loss-of-function induces white matter hyperintensities by inhibiting oligodendroglia proliferation. Cell Biochem Funct 2024; 42:e4057. [PMID: 38853469 DOI: 10.1002/cbf.4057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 04/12/2024] [Accepted: 05/12/2024] [Indexed: 06/11/2024]
Abstract
White matter hyperintensities (WMHs) refer to a group of diseases with numerous etiologies while oligodendrocytes remain the centerpiece in the pathogenesis of WMHs. Ring Finger Protein 216 (RNF216) encodes a ubiquitin ligase, and its mutation begets WMHs, ataxia, and cognitive decline in patients. Yet no study has revealed the function of RNF216 in oligodendroglia and WHIs before. In this study, we summarized the phenotypes of RNF216-mutation cases and explored the normal distribution of RNF216 in distinct brain regions and neuronal cells by bioinformatic analysis. Furthermore, MO3.13, a human oligodendrocyte cell line, was applied to study the function alteration after RNF216 knockdown. As a result, WMHs were the most common symptom in RNF216-mutated diseases, and RNF216 was indeed relatively enriched in corpus callosum and oligodendroglia in humans. The downregulation of RNF216 in oligodendroglia remarkably hampered cell proliferation by inhibiting the Akt pathway while having no significant effect on cell injury and oligodendrocyte maturation. Combining clinical, bioinformatical, and experimental evidence, our study implied the pivotal role of RNF216 in WMHs which might serve as a potent target in the therapy of WMHs.
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Affiliation(s)
- Wenqing Xu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Keliang Chen
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yiwen Yuan
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Guo
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Qiang Dong
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, China
| | - Mei Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
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Rey F, Esposito L, Maghraby E, Mauri A, Berardo C, Bonaventura E, Tonduti D, Carelli S, Cereda C. Role of epigenetics and alterations in RNA metabolism in leukodystrophies. WILEY INTERDISCIPLINARY REVIEWS. RNA 2024; 15:e1854. [PMID: 38831585 DOI: 10.1002/wrna.1854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 06/05/2024]
Abstract
Leukodystrophies are a class of rare heterogeneous disorders which affect the white matter of the brain, ultimately leading to a disruption in brain development and a damaging effect on cognitive, motor and social-communicative development. These disorders present a great clinical heterogeneity, along with a phenotypic overlap and this could be partially due to contributions from environmental stimuli. It is in this context that there is a great need to investigate what other factors may contribute to both disease insurgence and phenotypical heterogeneity, and novel evidence are raising the attention toward the study of epigenetics and transcription mechanisms that can influence the disease phenotype beyond genetics. Modulation in the epigenetics machinery including histone modifications, DNA methylation and non-coding RNAs dysregulation, could be crucial players in the development of these disorders, and moreover an aberrant RNA maturation process has been linked to leukodystrophies. Here, we provide an overview of these mechanisms hoping to supply a closer step toward the analysis of leukodystrophies not only as genetically determined but also with an added level of complexity where epigenetic dysregulation is of key relevance. This article is categorized under: Regulatory RNAs/RNAi/Riboswitches > Regulatory RNA RNA in Disease and Development > RNA in Disease RNA in Disease and Development > RNA in Development.
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Affiliation(s)
- Federica Rey
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi," Department of Biomedical and Clinical Sciences, University of Milano, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Letizia Esposito
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi," Department of Biomedical and Clinical Sciences, University of Milano, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Erika Maghraby
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
- Department of Biology and Biotechnology "L. Spallanzani" (DBB), University of Pavia, Pavia, Italy
| | - Alessia Mauri
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi," Department of Biomedical and Clinical Sciences, University of Milano, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Clarissa Berardo
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi," Department of Biomedical and Clinical Sciences, University of Milano, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Eleonora Bonaventura
- Unit of Pediatric Neurology, COALA Center for Diagnosis and Treatment of Leukodystrophies, V. Buzzi Children's Hospital, Milan, Italy
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Davide Tonduti
- Unit of Pediatric Neurology, COALA Center for Diagnosis and Treatment of Leukodystrophies, V. Buzzi Children's Hospital, Milan, Italy
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Stephana Carelli
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi," Department of Biomedical and Clinical Sciences, University of Milano, Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Cristina Cereda
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
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10
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Chaer LER, de Mendonça JM, Del Negro MC, Titze-de-Almeida R, Nogueira NPB, Provetti PM, de Paula Brandão PR, de Carvalho Bispo DD, Ferreira GB, Faber I, Cavalcante TB, Adoni T, Mazzeu JF, von Glehn F. Differential diagnosis between multiple sclerosis and leukodystrophies - A scoping review. J Neurol Sci 2024; 459:122969. [PMID: 38507990 DOI: 10.1016/j.jns.2024.122969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 02/01/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
Multiple Sclerosis (MS) is an autoimmune demyelinating disease of the central nervous system (CNS) characterized by damage to the myelin sheaths of oligodendrocytes. Currently, there is no specific biomarker to identify the disease; however, a diagnostic criterion has been established based on patient's clinical, laboratory, and imaging characteristics, which assists in identifying this condition. The primary method for diagnosing MS is the McDonald criteria, first described in 2001 and revised in the years 2005, 2012, and 2017. These criteria have been continuously reviewed to enhance specificity and sensitivity in the diagnosis of MS, thereby reducing errors in its differential diagnosis. An important differential diagnosis that shares overlapping features with MS, mainly the progressive forms, are leukodystrophies with demyelination as underlying pathology. Leukodystrophies comprise a rare group of genetically determined disorders that lead to either demyelination or hypomyelination of the central nervous system that can result neuroimaging changes as well as clinical findings similar to those observed in MS. Thus, systematic evaluation encompassing clinical presentation, neuroimaging findings, and laboratory metrics proves indispensable for a differential diagnosis. As such, this study aimed to establish, clearly and objectively, the similarities and differences between MS and the main demyelinating leukodystrophies. The study analyzed the parameters of the McDonald criteria, including clinical, laboratory, and magnetic resonance imaging aspects, as found in patients with leukodystrophies through scoping literature review. The data were compared with the determinations of the revised 2017 McDonald criteria to facilitate the differential diagnosis of these diseases in clinical practice.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Ingrid Faber
- School of Medicine, University of Brasilia, Brasilia, Brazil
| | | | | | | | - Felipe von Glehn
- School of Medicine, University of Brasilia, Brasilia, Brazil; Neuroimmunology Unit, Institute of Biology, University of Campinas, Campinas, Brazil.
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Hosseinpour S, Razmara E, Heidari M, Rezaei Z, Ashrafi MR, Dehnavi AZ, Kameli R, Bereshneh AH, Vahidnezhad H, Azizimalamiri R, Zamani Z, Pak N, Rasulinezhad M, Mohammadi B, Ghabeli H, Ghafouri M, Mohammadi M, Zamani GR, Badv RS, Saket S, Rabbani B, Mahdieh N, Ahani A, Garshasbi M, Tavasoli AR. A comprehensive study of mutation and phenotypic heterogeneity of childhood mitochondrial leukodystrophies. Brain Dev 2024; 46:167-179. [PMID: 38129218 DOI: 10.1016/j.braindev.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVE Mitochondrial leukodystrophies (MLs) are mainly caused by impairments of the mitochondrial respiratory chains. This study reports the mutation and phenotypic spectrum of a cohort of 41 pediatric patients from 39 distinct families with MLs among 320 patients with a molecular diagnosis of leukodystrophies. METHODS This study summarizes the clinical, imaging, and molecular data of these patients for five years. RESULTS The three most common symptoms were neurologic regression (58.5%), pyramidal signs (58.5%), and extrapyramidal signs (43.9%). Because nuclear DNA mutations are responsible for a high percentage of pediatric MLs, whole exome sequencing was performed on all patients. In total, 39 homozygous variants were detected. Additionally, two previously reported mtDNA variants were identified with different levels of heteroplasmy in two patients. Among 41 mutant alleles, 33 (80.4%) were missense, 4 (9.8%) were frameshift (including 3 deletions and one duplication), and 4 (9.8%) were splicing mutations. Oxidative phosphorylation in 27 cases (65.8%) and mtDNA maintenance pathways in 8 patients (19.5%) were the most commonly affected mitochondrial pathways. In total, 5 novel variants in PDSS1, NDUFB9, FXBL4, SURF1, and NDUSF1 were also detected. In silico analyses showed how each novel variant may contribute to ML pathogenesis. CONCLUSIONS The findings of this study suggest whole-exome sequencing as a strong diagnostic genetic tool to identify the causative variants in pediatric MLs. In comparison between oxidative phosphorylation (OXPHOS) and mtDNA maintenance groups, brain stem and periaqueductal gray matter (PAGM) involvement were more commonly seen in OXPHOS group (P value of 0.002 and 0.009, respectively), and thinning of corpus callosum was observed more frequently in mtDNA maintenance group (P value of 0.042).
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Affiliation(s)
- Sareh Hosseinpour
- Department of Pediatric Neurology, Vali-e-Asr Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ehsan Razmara
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Morteza Heidari
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Rezaei
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Reza Ashrafi
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Zare Dehnavi
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine and Science, Rochester, MN 55905, USA
| | - Reyhaneh Kameli
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Ali Hosseini Bereshneh
- Prenatal Diagnosis and Genetic Research Center, Dastgheib Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hassan Vahidnezhad
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, USA; Department of Pediatrics, The University of Pennsylvania School of Medicine, Philadelphia, USA
| | - Reza Azizimalamiri
- Department of Pediatric Neurology, Golestan Medical, Educational, and Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Zahra Zamani
- MD, MPH, Community Medicine Specialist, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Pak
- Department of Radiology, Children's Hospital Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Rasulinezhad
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahram Mohammadi
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Homa Ghabeli
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ghafouri
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Mohammadi
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Gholam Reza Zamani
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Shervin Badv
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Sasan Saket
- Iranian Child Neurology Center of Excellence, Pediatric Neurology Research Center, Research Institute for Children Health, Mofid Children's and Shohada-e Tajrish Hospitals, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bahareh Rabbani
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nejat Mahdieh
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran; Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Ahani
- Mendel Medical Genetics Laboratory, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Garshasbi
- Department of Medical Genetics, Faculty of Medical Sciences, Jalal-Al Ahmad Hwy, Tarbiat Modares University, Tehran, Iran.
| | - Ali Reza Tavasoli
- Myelin Disorders Clinic, Division of Pediatric Neurology, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Neurology Division, Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA.
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12
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Stavros K. Genetic Myelopathies. Continuum (Minneap Minn) 2024; 30:119-132. [PMID: 38330475 DOI: 10.1212/con.0000000000001377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
OBJECTIVE This article provides an overview of genetic myelopathies, a diverse group of inherited, degenerative conditions that may be broadly categorized as motor neuron disorders, disorders of spinocerebellar degeneration, leukodystrophies, and hereditary spastic paraplegia. Clinical examples from each category are provided to illustrate the spectrum of genetic myelopathies and their distinguishing features that aid in differentiating genetic myelopathies from potentially treatable acquired causes of myelopathy. LATEST DEVELOPMENTS Advances in genetic testing have vastly enhanced current knowledge of genetic myelopathies and the ability to diagnose and provide appropriate counseling to patients and their families. However, potential health care disparities in access to genetic testing is a topic that must be further explored. Although treatment for most of these conditions is typically supportive, there have been recent therapeutic breakthroughs in treatments for amyotrophic lateral sclerosis, spinal muscular atrophy, and Friedreich ataxia. ESSENTIAL POINTS Genetic myelopathies may present with chronic and progressive symptoms, a family history of similar symptoms, and involvement of other structures outside of the spinal cord. Imaging often shows spinal cord atrophy, but cord signal change is rare. Exclusion of reversible causes of myelopathy is a key step in the diagnosis. There are many different causes of genetic myelopathies, and in some cases, symptoms may overlap, which underscores the utility of genetic testing in confirming the precise underlying neurologic condition.
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Sparks J, Michelassi F, Thompson JLP, Buchsbaum R, Pires N, DeRosa JT, Engelstad K, DiMauro S, Akman HO, Hirano M. A United States-based patient-reported adult polyglucosan body disease registry: initial results. THERAPEUTIC ADVANCES IN RARE DISEASE 2024; 5:26330040241227452. [PMID: 38445267 PMCID: PMC10910880 DOI: 10.1177/26330040241227452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 01/03/2024] [Indexed: 03/07/2024]
Abstract
Background Adult Polyglucosan Body Disease (APBD) is an ultra-rare, genetic neurodegenerative disorder caused by autosomal recessive mutations in the glycogen branching enzyme gene. Knowledge of the demographic and clinical characteristics of APBD patients and the natural history of the disease is lacking. We report here initial results from a patient-reported registry of APBD patients. Objectives (1) Maximize the quality of the APBD Registry survey data; (2) provide an initial report on APBD disease progression and natural history using these data; and (3) specify next steps in the process for testing potential new therapies. Design Data are from members of the APBD Research Foundation (New York), surveyed from 2014 by the Columbia APBD Patient/Family (CAP) Registry. Inclusion criteria are: disease onset at age 18+ and progressive clinical triad of peripheral neuropathy, spasticity, and neurogenic bladder. Methods Genetic testing results were used when available. Respondents found to not have APBD in clinical records were excluded. All changes and exclusions were recorded in a database edit log. Results are reported in frequency tables, bar graphs, time plots, and heat maps. Results The 96 respondents meeting inclusion criteria were predominantly (96.8%) White, highly educated (89.3% at least some college education), and mostly (85.1%) of Ashkenazi Jewish descent. 57.1% had at least one parent born in the United States, with at least one grandparent from Europe (excluding Russia; 75.4%), the United States (42.1%), or Russia (33.3%). 37.2% reported a family history of APBD, and 33.3% had an affected sibling. Median APBD onset age was 51 [Interquartile range (IQR) 11], and median age of diagnosis 57 (IQR 10.5). The 75 reported prior misdiagnoses were mainly peripheral neuropathy (43, 60.6%) and spinal stenosis (11, 15.1%). Conclusion Although from a demographically constricted survey, the results provide basic clinical information for future studies to develop treatments for APBD.
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Affiliation(s)
- Jacy Sparks
- Department of Biostatistics, Mailman School of Public Health, Columbia University Irving Medical Center, New York, NY, USA
| | - Francesco Michelassi
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - John L. P. Thompson
- Department of Biostatistics, Mailman School of Public Health, Columbia University Irving Medical Center, New York, NY, USA
| | - Richard Buchsbaum
- Department of Biostatistics, Mailman School of Public Health, Columbia University Irving Medical Center, New York, NY, USA
| | - Natacha Pires
- Adult Polyglucosan Body Disease Research Foundation, Brooklyn, NY, USA
| | - Janet T. DeRosa
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Kristin Engelstad
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Salvatore DiMauro
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Hasan Orhan Akman
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Michio Hirano
- H. Houston Merritt Neuromuscular Research Center, Department of Neurology, Columbia University Irving Medical Center, 630 West 168th St, P&S 4-423, New York, NY 10032-3784, USA
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Freudenstein D, Lippert M, Popp JS, Aprato J, Wegner M, Sock E, Haase S, Linker RA, González Alvarado MN. Endogenous Sox8 is a critical factor for timely remyelination and oligodendroglial cell repletion in the cuprizone model. Sci Rep 2023; 13:22272. [PMID: 38097655 PMCID: PMC10721603 DOI: 10.1038/s41598-023-49476-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023] Open
Abstract
Genome-wide association studies identified a single nucleotide polymorphism (SNP) downstream of the transcription factor Sox8, associated with an increased risk of multiple sclerosis (MS). Sox8 is known to influence oligodendrocyte terminal differentiation and is involved in myelin maintenance by mature oligodendrocytes. The possible link of a Sox8 related SNP and MS risk, along with the role of Sox8 in oligodendrocyte physiology prompted us to investigate its relevance during de- and remyelination using the cuprizone model. Sox8-/- mice and wildtype littermates received a cuprizone diet for 5 weeks (wk). Sox8-/- mice showed reduced motor performance and weight compared to wildtype controls. Brains were histologically analysed at the maximum of demyelination (wk 5) and on two time points during remyelination (wk 5.5 and wk 6) for oligodendroglial, astroglial, microglial and myelin markers. We identified reduced proliferation of oligodendrocyte precursor cells at wk 5 as well as reduced numbers of mature oligodendrocytes in Sox8-/- mice at wk 6. Moreover, analysis of myelin markers revealed a delay in remyelination in the Sox8-/- group, demonstrating the potential importance of Sox8 in remyelination processes. Our findings present, for the first time, compelling evidence of a significant role of Sox8 in the context of a disease model.
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Affiliation(s)
- David Freudenstein
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Magdalena Lippert
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Janina Sophie Popp
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Jessica Aprato
- Institute of Biochemistry, Friedrich-Alexander University Erlangen, Erlangen, Germany
| | - Michael Wegner
- Institute of Biochemistry, Friedrich-Alexander University Erlangen, Erlangen, Germany
| | - Elisabeth Sock
- Institute of Biochemistry, Friedrich-Alexander University Erlangen, Erlangen, Germany
| | - Stefanie Haase
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
| | - Ralf A Linker
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - María Nazareth González Alvarado
- Neuroimmunology Laboratory, Department of Neurology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna Biocenter (VBC), Vienna, Austria
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15
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Waung MW, Ma F, Wheeler AG, Zai CC, So J. The Diagnostic Landscape of Adult Neurogenetic Disorders. BIOLOGY 2023; 12:1459. [PMID: 38132285 PMCID: PMC10740572 DOI: 10.3390/biology12121459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/11/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023]
Abstract
Neurogenetic diseases affect individuals across the lifespan, but accurate diagnosis remains elusive for many patients. Adults with neurogenetic disorders often undergo a long diagnostic odyssey, with multiple specialist evaluations and countless investigations without a satisfactory diagnostic outcome. Reasons for these diagnostic challenges include: (1) clinical features of neurogenetic syndromes are diverse and under-recognized, particularly those of adult-onset, (2) neurogenetic syndromes may manifest with symptoms that span multiple neurological and medical subspecialties, and (3) a positive family history may not be present or readily apparent. Furthermore, there is a large gap in the understanding of how to apply genetic diagnostic tools in adult patients, as most of the published literature focuses on the pediatric population. Despite these challenges, accurate genetic diagnosis is imperative to provide affected individuals and their families guidance on prognosis, recurrence risk, and, for an increasing number of disorders, offer targeted treatment. Here, we provide a framework for recognizing adult neurogenetic syndromes, describe the current diagnostic approach, and highlight studies using next-generation sequencing in different neurological disease cohorts. We also discuss diagnostic pitfalls, barriers to achieving a definitive diagnosis, and emerging technology that may increase the diagnostic yield of testing.
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Affiliation(s)
- Maggie W. Waung
- Division of General Neurology, Department of Neurology, Weill Institute for Neurosciences, University of California, San Francisco, CA 94158, USA
| | - Fion Ma
- Institute for Human Genetics, University of California San Francisco School of Medicine, San Francisco, CA 94143, USA
| | - Allison G. Wheeler
- Institute for Human Genetics, University of California San Francisco School of Medicine, San Francisco, CA 94143, USA
- Department of Neurology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Clement C. Zai
- Tanenbaum Centre for Pharmacogenetics, Molecular Brain Science, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON M5T 1R8, Canada
- Department of Psychiatry, Institute of Medical Science, Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Joyce So
- Division of Medical Genetics, Department of Pediatrics, University of California, San Francisco, CA 94158, USA
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Cocostîrc V, Paștiu AI, Pusta DL. An Overview of Canine Inherited Neurological Disorders with Known Causal Variants. Animals (Basel) 2023; 13:3568. [PMID: 38003185 PMCID: PMC10668755 DOI: 10.3390/ani13223568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
Hereditary neurological conditions documented in dogs encompass congenital, neonatal, and late-onset disorders, along with both progressive and non-progressive forms. In order to identify the causal variant of a disease, the main two approaches are genome-wide investigations and candidate gene investigation. Online Mendelian Inheritance in Animals currently lists 418 Mendelian disorders specific to dogs, of which 355 have their likely causal genetic variant identified. This review aims to summarize the current knowledge on the canine nervous system phenes and their genetic causal variant. It has been noted that the majority of these diseases have an autosomal recessive pattern of inheritance. Additionally, the dog breeds that are more prone to develop such diseases are the Golden Retriever, in which six inherited neurological disorders with a known causal variant have been documented, and the Belgian Shepherd, in which five such disorders have been documented. DNA tests can play a vital role in effectively managing and ultimately eradicating inherited diseases.
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Affiliation(s)
- Vlad Cocostîrc
- Department of Genetics and Hereditary Diseases, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania; (A.I.P.); (D.L.P.)
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Sun L, Lin W, Meng H, Zhang W, Hou S. A Chinese patient with POLR3A-related leukodystrophy: a case report and literature review. Front Neurol 2023; 14:1269237. [PMID: 37965164 PMCID: PMC10641775 DOI: 10.3389/fneur.2023.1269237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 10/10/2023] [Indexed: 11/16/2023] Open
Abstract
Background Leukodystrophies are hereditary white matter diseases characterized by genetic polymorphisms and considerable phenotypic variability. They can be classified into myelin and non-myelin malformations. These diseases are rare, affecting 1 out of 250,000-500,000 individuals and can manifest at any age. A subtype of leukodystrophy, associated with missense mutations in the RNA polymerase subunit III (POLR3A) gene, is inherited in an autosomal recessive manner. Case report We report and analyse a case of a 34-year-old female who presented with ataxia. Magnetic Resonance Imaging (MRI) of the brain revealed demyelinating lesions in the white matter. Genetic testing identified the c.4044C > G and c.1186-2A > G variants in the POLR3A gene. The patient was diagnosed with hypomyelinating leukodystrophy type 7 and received neurotrophic and symptomatic supportive therapy. However, after 1 month of follow-up, there was no improvement in her symptoms. Conclusion POLR3A-induced leukodystrophy is relatively rare and not well understood, making it challenging to diagnose and easy to overlook. The prognosis for this disease is generally poor, significantly impacting the quality of life of affected individuals. Currently, no cure is available for this condition, and treatment is limited to managing symptoms. Further research into new treatment methods for POLR3A-induced leukodystrophy is imperative to improve the quality of life and potentially extend the life expectancy of patients.
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Affiliation(s)
| | | | | | | | - Shuai Hou
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
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18
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Ashrafi M, Kameli R, Hosseinpour S, Razmara E, Zamani Z, Rezaei Z, Mashayekhi R, Pak N, Barzegar M, Azizimalamiri R, Kashani MR, Khosroshahi N, Rasulinezhad M, Heidari M, Amanat M, Abdi A, Mohammadi B, Mohammadi M, Zamani GR, Badv RS, Omrani A, Nikbakht S, Bereshneh AH, Movahedinia M, Moghaddam HF, Ardakani HS, Akbari MG, Tousi MB, Shahi MV, Hosseini F, Amouzadeh MH, Hosseini SA, Nikkhah A, Khajeh A, Alizadeh H, Yarali B, Rohani M, Karimi P, Elahi HML, Hosseiny SMM, Sadeghzadeh MS, Mohebbi H, Moghadam MH, Aryan H, Vahidnezhad H, Soveizi M, Rabbani B, Rabbani A, Mahdieh N, Garshasbi M, Tavasoli AR. High genetic heterogeneity of leukodystrophies in Iranian children: the first report of Iranian Leukodystrophy Registry. Neurogenetics 2023; 24:279-289. [PMID: 37597066 DOI: 10.1007/s10048-023-00730-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 08/09/2023] [Indexed: 08/21/2023]
Abstract
Leukodystrophies (LDs) are a heterogeneous group of progressive neurological disorders and characterized by primary involvement of white matter of the central nervous system (CNS). This is the first report of the Iranian LD Registry database to describe the clinical, radiological, and genomic data of Persian patients with leukodystrophies. From 2016 to 2019, patients suspicious of LDs were examined followed by a brain magnetic resonance imaging (MRI). A single gene testing or whole-exome sequencing (WES) was used depending on the neuroradiologic phenotypes. In a few cases, the diagnosis was made by metabolic studies. Based on the MRI pattern, diagnosed patients were divided into cohorts A (hypomyelinating LDs) versus cohort B (Other LDs). The most recent LD classification was utilized for classification of diagnosed patients. For novel variants, in silico analyses were performed to verify their pathogenicity. Out of 680 registered patients, 342 completed the diagnostic evaluations. In total, 245 patients met a diagnosis which in turn 24.5% were categorized in cohort A and the remaining in cohort B. Genetic tests revealed causal variants in 228 patients consisting of 213 variants in 110 genes with 78 novel variants. WES and single gene testing identified a causal variant in 65.5% and 34.5% cases, respectively. The total diagnostic rate of WES was 60.7%. Lysosomal disorders (27.3%; GM2-gangliosidosis-9.8%, MLD-6.1%, KD-4.5%), amino and organic acid disorders (17.15%; Canavan disease-4.5%, L-2-HGA-3.6%), mitochondrial leukodystrophies (12.6%), ion and water homeostasis disorders (7.3%; MLC-4.5%), peroxisomal disorders (6.5%; X-ALD-3.6%), and myelin protein disorders (3.6%; PMLD-3.6%) were the most commonly diagnosed disorders. Thirty-seven percent of cases had a pathogenic variant in nine genes (ARSA, HEXA, ASPA, MLC1, GALC, GJC2, ABCD1, L2HGDH, GCDH). This study highlights the most common types as well as the genetic heterogeneity of LDs in Iranian children.
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Affiliation(s)
- Mahmoudreza Ashrafi
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Reyhaneh Kameli
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Sareh Hosseinpour
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Ehsan Razmara
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Zahra Zamani
- MD, MPH, Community Medicine Specialist, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Rezaei
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Raziyeh Mashayekhi
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Neda Pak
- Department of Radiology, Children's Hospital Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Barzegar
- Pediatric Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Azizimalamiri
- Department of Pediatric Neurology, Golestan Medical, Educational, and Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Nahideh Khosroshahi
- Department of Pediatric Neurology, Bahrami Children Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Rasulinezhad
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Morteza Heidari
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Man Amanat
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Alireza Abdi
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Bahram Mohammadi
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Mahmoud Mohammadi
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Gholam Reza Zamani
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Shervin Badv
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Abdolmajid Omrani
- Division of Clinical Studies, The Persian Gulf Nuclear Medicine Research Center, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Sedigheh Nikbakht
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Ali Hosseini Bereshneh
- Prenatal Diagnosis and Genetic Research Center, Dastgheib Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mojtaba Movahedinia
- Department of Pediatric, Growth Disorders of Children Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | | | | | - Masood Ghahvechi Akbari
- Department of Physical Medicine and Rehabilitation, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehran Beiraghi Tousi
- Pediatric Ward, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Vafaee Shahi
- Pediatric Growth and Development Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Firouzeh Hosseini
- Department of Pediatric Neurology, Hamedan University of Medical Sciences, Hamedan, Iran
| | | | - Seyed Ahmad Hosseini
- Department of Pediatric Neurology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ali Nikkhah
- Department of Pediatric Neurology, Mofid Children Hospital, Shahid Beheshti University of Medical, Tehran, Iran
| | - Ali Khajeh
- Children and Adolescence Research Center, Zahedan University of Medical Sciences, Zahedan, 000000321469345, Iran
| | - Hooman Alizadeh
- Department of Radiology, Children's Hospital Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahram Yarali
- Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Rohani
- Department of Neurology, Hazrat-E-Rasool Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Parviz Karimi
- Department of Pediatric Neurology, Ilam University of Medical Sciences, Ilam, Iran
| | - Hadi Montazer Lotf Elahi
- Department of Pediatric Neurology, Imam Ali Hospital, Alborz University of Medical Sciences, Karaj, Iran
| | - Seyyed Mohamad Mahdi Hosseiny
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Masoumeh Sadat Sadeghzadeh
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran
| | - Hossein Mohebbi
- Department of Pediatric Neurology, AJA University of Medical Sciences, Tehran, Iran
| | - Maryam Hosseini Moghadam
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Hajar Aryan
- Farhud Medical Genetic Laboratory, Tehran University of Medical Sciences, Tehran, Iran
| | - Hassan Vahidnezhad
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, USA
- Department of Pediatrics, The University of Pennsylvania School of Medicine, Philadelphia, USA
| | - Mahdieh Soveizi
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Bahareh Rabbani
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Rabbani
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nejat Mahdieh
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Garshasbi
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Jalal-Al Ahmad Hwy, Tehran, Iran.
| | - Ali Reza Tavasoli
- Myelin Disorders Clinic, Pediatric Neurology Division, Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, No. 61, Gharib Street, Keshavarz Blvd, Tehran, 1419733151, Iran.
- Pediatric Headache Program, Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ, USA.
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Muthusamy K, Sivadasan A, Dixon L, Sudhakar S, Thomas M, Danda S, Wszolek ZK, Wierenga K, Dhamija R, Gavrilova R. Adult-onset leukodystrophies: a practical guide, recent treatment updates, and future directions. Front Neurol 2023; 14:1219324. [PMID: 37564735 PMCID: PMC10410460 DOI: 10.3389/fneur.2023.1219324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/19/2023] [Indexed: 08/12/2023] Open
Abstract
Adult-onset leukodystrophies though individually rare are not uncommon. This group includes several disorders with isolated adult presentations, as well as several childhood leukodystrophies with attenuated phenotypes that present at a later age. Misdiagnoses often occur due to the clinical and radiological overlap with common acquired disorders such as infectious, immune, inflammatory, vascular, metabolic, and toxic etiologies. Increased prevalence of non-specific white matter changes in adult population poses challenges during diagnostic considerations. Clinico-radiological spectrum and molecular landscape of adult-onset leukodystrophies have not been completely elucidated at this time. Diagnostic approach is less well-standardized when compared to the childhood counterpart. Absence of family history and reduced penetrance in certain disorders frequently create a dilemma. Comprehensive evaluation and molecular confirmation when available helps in prognostication, early initiation of treatment in certain disorders, enrollment in clinical trials, and provides valuable information for the family for reproductive counseling. In this review article, we aimed to formulate an approach to adult-onset leukodystrophies that will be useful in routine practice, discuss common adult-onset leukodystrophies with usual and unusual presentations, neuroimaging findings, recent advances in treatment, acquired mimics, and provide an algorithm for comprehensive clinical, radiological, and genetic evaluation that will facilitate early diagnosis and consider active treatment options when available. A high index of suspicion, awareness of the clinico-radiological presentations, and comprehensive genetic evaluation are paramount because treatment options are available for several disorders when diagnosed early in the disease course.
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Affiliation(s)
- Karthik Muthusamy
- Department of Clinical Genomics, Mayo Clinic, Jacksonville, FL, United States
| | - Ajith Sivadasan
- Department of Neurological Sciences, Christian Medical College, Tamil Nadu, Vellore, India
| | - Luke Dixon
- Department of Radiology, Imperial College, NHS Trust, London, United Kingdom
| | - Sniya Sudhakar
- Department of Radiology, Great Ormond Street Hospital, London, United Kingdom
| | - Maya Thomas
- Department of Neurological Sciences, Christian Medical College, Tamil Nadu, Vellore, India
| | - Sumita Danda
- Department of Medical Genetics, Christian Medical College, Vellore, Tamil Nadu, India
| | | | - Klaas Wierenga
- Department of Clinical Genomics, Mayo Clinic, Jacksonville, FL, United States
| | - Radhika Dhamija
- Department of Clinical Genomics and Neurology, Mayo Clinic, Phoenix, AZ, United States
| | - Ralitza Gavrilova
- Department of Clinical Genomics and Neurology, Mayo Clinic, Rochester, MN, United States
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20
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Wu C, Wang M, Wang X, Li W, Li S, Chen B, Niu S, Tai H, Pan H, Zhang Z. The genetic and phenotypic spectra of adult genetic leukoencephalopathies in a cohort of 309 patients. Brain 2023; 146:2364-2376. [PMID: 36380532 PMCID: PMC10232248 DOI: 10.1093/brain/awac426] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 09/30/2022] [Accepted: 11/01/2022] [Indexed: 08/12/2023] Open
Abstract
Genetic leukoencephalopathies (gLEs) are a highly heterogeneous group of rare genetic disorders. The spectrum of gLEs varies among patients of different ages. Distinct from the relatively more abundant studies of gLEs in children, only a few studies that explore the spectrum of adult gLEs have been published, and it should be noted that the majority of these excluded certain gLEs. Thus, to date, no large study has been designed and conducted to characterize the genetic and phenotypic spectra of gLEs in adult patients. We recruited a consecutive series of 309 adult patients clinically suspected of gLEs from Beijing Tiantan Hospital between January 2014 and December 2021. Whole-exome sequencing, mitochondrial DNA sequencing and repeat analysis of NOTCH2NLC, FMR1, DMPK and ZNF9 were performed for patients. We describe the genetic and phenotypic spectra of the set of patients with a genetically confirmed diagnosis and summarize their clinical and radiological characteristics. A total of 201 patients (65%) were genetically diagnosed, while 108 patients (35%) remained undiagnosed. The most frequent diseases were leukoencephalopathies related to NOTCH3 (25%), NOTCH2NLC (19%), ABCD1 (9%), CSF1R (7%) and HTRA1 (5%). Based on a previously proposed pathological classification, the gLEs in our cohort were divided into leukovasculopathies (35%), leuko-axonopathies (31%), myelin disorders (21%), microgliopathies (7%) and astrocytopathies (6%). Patients with NOTCH3 mutations accounted for 70% of the leukovasculopathies, followed by HTRA1 (13%) and COL4A1/2 (9%). The leuko-axonopathies contained the richest variety of associated genes, of which NOTCH2NLC comprised 62%. Among myelin disorders, demyelinating leukoencephalopathies (61%)-mainly adrenoleukodystrophy and Krabbe disease-accounted for the majority, while hypomyelinating leukoencephalopathies (2%) were rare. CSF1R was the only mutated gene detected in microgliopathy patients. Leukoencephalopathy with vanishing white matter disease due to mutations in EIF2B2-5 accounted for half of the astrocytopathies. We characterized the genetic and phenotypic spectra of adult gLEs in a large Chinese cohort. The most frequently mutated genes were NOTCH3, NOTCH2NLC, ABCD1, CSF1R and HTRA1.
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Affiliation(s)
- Chujun Wu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Mengwen Wang
- Department of Neurology and Institute of Neurology of First Affiliated Hospital, Institute of Neuroscience, and Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, 350005 Fuzhou, China
| | - Xingao Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Wei Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Shaowu Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Bin Chen
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Songtao Niu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Hongfei Tai
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Hua Pan
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Zaiqiang Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
- China National Clinical Research Centre for Neurological Disease, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
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21
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Bergner CG, Schäfer L, Vucinic V, Schetschorke B, Lier J, Scherlach C, Rullmann M, Sabri O, Classen J, Platzbecker U, Kühl JS, Barthel H, Köhler W, Franke GN. Case report: Treatment of advanced CSF1-receptor associated leukoencephalopathy with hematopoietic stem cell transplant. Front Neurol 2023; 14:1163107. [PMID: 37292133 PMCID: PMC10246448 DOI: 10.3389/fneur.2023.1163107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/25/2023] [Indexed: 06/10/2023] Open
Abstract
CSF1 receptor-related leukoencephalopathy is a rare genetic disorder presenting with severe, adult-onset white matter dementia as one of the leading symptoms. Within the central nervous system, the affected CSF1-receptor is expressed exclusively in microglia cells. Growing evidence implicates that replacing the defective microglia with healthy donor cells through hematopoietic stem cell transplant might halt disease progression. Early initiation of that treatment is crucial to limit persistent disability. However, which patients are suitable for this treatment is not clear, and imaging biomarkers that specifically depict lasting structural damage are lacking. In this study, we report on two patients with CSF1R-related leukoencephalopathy in whom allogenic hematopoietic stem cell transplant at advanced disease stages led to clinical stabilization. We compare their disease course with that of two patients admitted in the same timeframe to our hospital, considered too late for treatment, and place our cases in context with the respective literature. We propose that the rate of clinical progression might be a suitable stratification measure for treatment amenability in patients. Furthermore, for the first time we evaluate [18F] florbetaben, a PET tracer known to bind to intact myelin, as a novel MRI-adjunct tool to image white matter damage in CSF1R-related leukoencephalopathy. In conclusion, our data add evidence for allogenic hematopoietic stem cell transplant as a promising treatment in CSF1R-related leukoencephalopathy patients with slow to moderate disease progression.
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Affiliation(s)
- Caroline G. Bergner
- Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Leipzig, Germany
| | - Lisa Schäfer
- Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Leipzig, Germany
| | - Vladan Vucinic
- Medical Department, Hematology, Cellular Therapies and Hemostaseology, University of Leipzig Medical Center, Leipzig, Germany
| | - Birthe Schetschorke
- Medical Department, Hematology, Cellular Therapies and Hemostaseology, University of Leipzig Medical Center, Leipzig, Germany
| | - Julia Lier
- Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Leipzig, Germany
| | - Cordula Scherlach
- Department of Radiology, University of Leipzig Medical Center, Leipzig, Germany
| | - Michael Rullmann
- Department Pediatric Oncology and Hematology, University of Leipzig Medical Center, Leipzig, Germany
| | - Osama Sabri
- Department Pediatric Oncology and Hematology, University of Leipzig Medical Center, Leipzig, Germany
| | - Joseph Classen
- Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Leipzig, Germany
| | - Uwe Platzbecker
- Medical Department, Hematology, Cellular Therapies and Hemostaseology, University of Leipzig Medical Center, Leipzig, Germany
| | - Jörn-Sven Kühl
- Department Pediatric Oncology and Hematology, University of Leipzig Medical Center, Leipzig, Germany
| | - Henryk Barthel
- Department of Nuclear Medicine, University of Leipzig Medical Center, Leipzig, Germany
| | - Wolfgang Köhler
- Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Leipzig, Germany
| | - Georg-Nikolaus Franke
- Medical Department, Hematology, Cellular Therapies and Hemostaseology, University of Leipzig Medical Center, Leipzig, Germany
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22
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Liu S, Zhou H, Xu W, Jin T, Liang X, Zhao X, Dai Y, Jin F. Early leukoencephalopathy during daratumumab treatment in a patient with multiple myeloma. Ann Hematol 2023; 102:967-969. [PMID: 36752844 PMCID: PMC9907188 DOI: 10.1007/s00277-023-05120-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 01/30/2023] [Indexed: 02/09/2023]
Affiliation(s)
- Shanshan Liu
- Hematology Department, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130012, Jilin, China.,Laboratory of Cancer Precision Medicine, First Hospital of Jilin University, 519 Dongminzhu Street, Changchun, 130061, Jilin, China
| | - Hongwei Zhou
- Radiology Department, First Hospital of Jilin University, Changchun, Jilin, China
| | - Weiling Xu
- Radiology Department, First Hospital of Jilin University, Changchun, Jilin, China
| | - Tao Jin
- Neurology Department, First Hospital of Jilin University, Changchun, Jilin, China
| | - Xinyue Liang
- Hematology Department, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130012, Jilin, China
| | - Xiaoxia Zhao
- Hematology Department, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130012, Jilin, China
| | - Yun Dai
- Laboratory of Cancer Precision Medicine, First Hospital of Jilin University, 519 Dongminzhu Street, Changchun, 130061, Jilin, China.
| | - Fengyan Jin
- Hematology Department, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130012, Jilin, China.
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23
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Schäfer L, Roicke H, Bergner CC, Köhler W. Self-reported quality of life in symptomatic and asymptomatic women with X-linked adrenoleukodystrophy. Brain Behav 2023; 13:e2878. [PMID: 36748403 PMCID: PMC10013936 DOI: 10.1002/brb3.2878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 12/17/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Up to 80% of women with X-linked adrenoleukodystrophy (X-ALD) develop symptoms of myelopathy and peripheral neuropathy during their lifetime. The study's objective was to compare symptomatic versus asymptomatic women with X-ALD regarding their physical and mental well-being and quality of life. METHODS Data were obtained from a prospective, international, cross-sectional cohort study of women with X-ALD recruited both clinically and population based. Symptoms, quality of life, and physical and mental co-morbidities were assessed by questionnaires. Women were considered symptomatic if they reported any sign of myelopathy or peripheral neuropathy. Group differences between symptomatic versus asymptomatic women and between age groups were examined using χ2 tests for categorical and independent sample t tests or analysis of variance for continuous variables. RESULTS Complete data were available from N = 180 women (mean age: 51.2 ± 13.6 years, range: 18-85), of whom 71.7% were classified as symptomatic, with prevalence increasing with age. Symptomatic versus asymptomatic women reported poorer physical and mental health, with 26.4% meeting the criteria for a clinical depression, 73.6% reporting chronic pain, 80.6% sleeping disturbances, 38.2% sexual dysfunction, and 47.3% restless legs syndrome. Large group differences were found on the physical health, but not on the mental health component of quality of life, where symptomatic women only differed when controlling for having a boy affected by X-ALD (small effect) and treatment frequency (medium effect). CONCLUSIONS Symptomatic women with X-ALD present with physical and psychological co-morbidities significantly reducing individuals' quality of life. The findings emphasize the need to develop new multi-disciplinary treatment options tailored to women's specific needs.
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Affiliation(s)
- Lisa Schäfer
- Department of Neurology, Leukodystrophy Outpatient Clinic, Leipzig University Medical Center, Leipzig, Germany
| | - Hannes Roicke
- Department of Neurology, Leukodystrophy Outpatient Clinic, Leipzig University Medical Center, Leipzig, Germany
| | - Christa-Caroline Bergner
- Department of Neurology, Leukodystrophy Outpatient Clinic, Leipzig University Medical Center, Leipzig, Germany
| | - Wolfgang Köhler
- Department of Neurology, Leukodystrophy Outpatient Clinic, Leipzig University Medical Center, Leipzig, Germany
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24
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Rossi S, Concolino P, Di Natale D, Pasquetti D, Di Lella GM, Chiurazzi P, Silvestri G. Clinical Reasoning: A Young Man With Subacute Onset of Spastic Paraparesis. Neurology 2023; 100:199-205. [PMID: 36302663 DOI: 10.1212/wnl.0000000000201516] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 09/20/2022] [Indexed: 01/25/2023] Open
Abstract
Leukodystrophies are a group of rare neurodegenerative disorders, usually presenting in infancy with a variable combination of cognitive, motor, and coordination impairment. Adult-onset cases are even more rare, often representing a diagnostic challenge even for experienced neurologists. Here, we present a case of a 44-year-old man with subacute and rapidly progressive spastic paraplegia, whose brain MRI revealed white matter abnormalities compatible with a diagnosis of leukodystrophy. We discuss how to apply a simplified diagnostic algorithm to distinguish acquired leukoencephalopathies from leukodystrophies and how to delve into the maze of genetic testing for white matter diseases. In our patient, we reached the diagnosis of a treatable disorder, whose early recognition is essential to prevent severe neurologic deterioration.
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Affiliation(s)
- Salvatore Rossi
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Paola Concolino
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Daniele Di Natale
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Domizia Pasquetti
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Giuseppe Maria Di Lella
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Pietro Chiurazzi
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Gabriella Silvestri
- From the Dipartimento di Scienze dell'Invecchiamento (S.R., D.D.N., G.S.), Neurologiche, Ortopediche e della Testa-Collo, UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Dipartimento di Neuroscienze Università Cattolica del Sacro Cuore (S.R., D.D.N., G.S.), Facoltà di Medicina e Chirurgia, Rome, Italy; UOC Chimica (Paola Concolino), Biochimica e Biologia Molecolare Clinica - Area Diagnostica di Laboratorio, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Istituto di Medicina Genomica (D.P., Pietro Chiurazzi), Università Cattolica del Sacro Cuore, Rome, Italy; Department of Diagnostic Imaging (G.M.D.L.), Oncological Radiotherapy, and Hematology, UOC Neuroradiology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS and Università Cattolica del Sacro Cuore, 00168 Rome, Italy; and UOC Genetica Medica (Pietro Chiurazzi), Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy.
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25
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Silva ME, Hernández-Andrade M, Abasolo N, Espinoza-Cruells C, Mansilla JB, Reyes CR, Aranda S, Esteban Y, Rodriguez-Calvo R, Martorell L, Muntané G, Rivera FJ, Vilella E. DDR1 and Its Ligand, Collagen IV, Are Involved in In Vitro Oligodendrocyte Maturation. Int J Mol Sci 2023; 24:ijms24021742. [PMID: 36675255 PMCID: PMC9866737 DOI: 10.3390/ijms24021742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Discoidin domain receptor 1 (DDR1) is a tyrosine kinase receptor expressed in epithelial cells from different tissues in which collagen binding activates pleiotropic functions. In the brain, DDR1 is mainly expressed in oligodendrocytes (OLs), the function of which is unclear. Whether collagen can activate DDR1 in OLs has not been studied. Here, we assessed the expression of DDR1 during in vitro OL differentiation, including collagen IV incubation, and the capability of collagen IV to induce DDR1 phosphorylation. Experiments were performed using two in vitro models of OL differentiation: OLs derived from adult rat neural stem cells (NSCs) and the HOG16 human oligodendroglial cell line. Immunocytofluorescence, western blotting, and ELISA were performed to analyze these questions. The differentiation of OLs from NSCs was addressed using oligodendrocyte transcription factor 2 (Olig2) and myelin basic protein (MBP). In HOG16 OLs, collagen IV induced DDR1 phosphorylation through slow and sustained kinetics. In NSC-derived OLs, DDR1 was found in a high proportion of differentiating cells (MBP+/Olig2+), but its protein expression was decreased in later stages. The addition of collagen IV did not change the number of DDR1+/MBP+ cells but did accelerate OL branching. Here, we provide the first demonstration that collagen IV mediates the phosphorylation of DDR1 in HOG16 cells and that the in vitro co-expression of DDR1 and MBP is associated with accelerated branching during the differentiation of primary OLs.
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Affiliation(s)
- Maria Elena Silva
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
- Institute of Pharmacy, Faculty of Sciences, Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Matías Hernández-Andrade
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Nerea Abasolo
- Hospital Universitari Institut Pere Mata, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43206 Reus, Spain
| | - Cristóbal Espinoza-Cruells
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Josselyne B. Mansilla
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Carolina R. Reyes
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
| | - Selena Aranda
- Hospital Universitari Institut Pere Mata, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43206 Reus, Spain
- Centro de Investigación Biomédica en Red en Salud Mental, CIBERSAM-Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Yaiza Esteban
- Vascular Medicine and Metabolism Unit, Research Unit on Lipids and Atherosclerosis, “Sant Joan” University Hospital, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43204 Reus, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
| | - Ricardo Rodriguez-Calvo
- Vascular Medicine and Metabolism Unit, Research Unit on Lipids and Atherosclerosis, “Sant Joan” University Hospital, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43204 Reus, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
| | - Lourdes Martorell
- Hospital Universitari Institut Pere Mata, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43206 Reus, Spain
- Centro de Investigación Biomédica en Red en Salud Mental, CIBERSAM-Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Gerard Muntané
- Hospital Universitari Institut Pere Mata, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43206 Reus, Spain
- Centro de Investigación Biomédica en Red en Salud Mental, CIBERSAM-Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Francisco J. Rivera
- Laboratory of Stem Cells and Neuroregeneration, Institute of Anatomy, Histology and Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia 5090000, Chile
- Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
- Translational Regenerative Neurobiology Group, Molecular and Integrative Biosciences Research Program (MIBS), Faculty of Biological and Environmental Sciences, University of Helsinki, 00014 Helsinki, Finland
- Correspondence: or (F.J.R.); (E.V.); Tel.: +358-50-598-8142 or +56-63-229-3011 (F.J.R.); +34-658-513-138 (E.V.)
| | - Elisabet Vilella
- Hospital Universitari Institut Pere Mata, Institut d’Investigació Sanitària Pere Virgili-CERCA, Universitat Rovira i Virgili, 43206 Reus, Spain
- Centro de Investigación Biomédica en Red en Salud Mental, CIBERSAM-Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence: or (F.J.R.); (E.V.); Tel.: +358-50-598-8142 or +56-63-229-3011 (F.J.R.); +34-658-513-138 (E.V.)
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Leucoencefalopatie ereditarie e leucodistrofie dell’adulto. Neurologia 2022. [DOI: 10.1016/s1634-7072(22)47096-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
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Hametner S, Silvaieh S, Thurnher M, Dal-Bianco A, Cetin H, Ponleitner M, Zebenholzer K, Pemp B, Trattnig S, Rössler K, Berger T, Lassmann H, Hainfellner JA, Bsteh G. A case of primary optic pathway demyelination caused by oncocytic oligodendrogliopathy of unknown origin. Acta Neuropathol Commun 2022; 10:160. [DOI: 10.1186/s40478-022-01462-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 10/13/2022] [Indexed: 11/11/2022] Open
Abstract
AbstractWe report the case of a 22-year-old woman presenting with an acute onset of dizziness, gait dysbalance and blurred vision. Magnetic resonance imaging included 3 Tesla and 7 Tesla imaging and revealed a T2-hyperintense, T1-hypointense, non-contrast-enhancing lesion strictly confined to the white matter affecting the right optic radiation. An extensive ophthalmologic examination yielded mild quadrantanopia but no signs of optic neuropathy. The lesion was biopsied. The neuropathological evaluation revealed a demyelinating lesion with marked tissue vacuolization and granular myelin disintegration accompanied by mild T cell infiltration and a notable absence of myelin uptake by macrophages. Oligodendrocytes were strikingly enlarged, displaying oncocytic characteristics and showed cytoplasmic accumulation of mitochondria, which had mildly abnormal morphology on electron microscopy. The diagnosis of multiple sclerosis was excluded. Harding's disease, a variant of Leber's hereditary optic neuropathy, was then suspected. However, neither PCR for relevant mutations nor whole exome sequencing yielded known pathogenetic mutations in the patient's genome. We present a pattern of demyelinating tissue injury of unknown etiology with an oncocytic change of oligodendrocytes and a lack of adequate phagocytic response by macrophages, which to the best of our knowledge, has not been described before.
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Wang BL, Lu FL, Sun YC, Wang HJ. Case report: A compound heterozygous mutations in ARSA associated with adult-onset metachromatic leukodystrophy. Front Neurol 2022; 13:1011019. [PMID: 36324388 PMCID: PMC9619211 DOI: 10.3389/fneur.2022.1011019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Metachromatic Leukodystrophy (MLD) is a rare autosomal recessive disease, which is caused by mutations in the arylsulfatase A (ARSA) gene. The ARSA gene is located on chromosome 22q13, containing eight exons. According to the age of onset, MLD can be divided into late infantile type, juvenile type, and adult type. Adult MLD has an insidious onset after the age of 16 years. Additionally, intellectual as well as behavioral changes, such as memory deficits or emotional instability, are commonly the first presenting symptoms. There is a study that reported an adult-onset MLD manifested cognitive impairment progressively due to compound heterozygous mutations of NM_000487: c.[185_186dupCA], p.(Asp63GlnfsTer18), and NM_000487: c.[154G>T], p.(Gly172Cys), rs74315271 in the ARSA gene, finding that the c.[154G>T], p.(Gly172Cys) is a novel missense mutation. Brain magnetic resonance imaging (MRI) revealed symmetrical demyelination of white matter. The activity of ARSA enzymatic in leukocytes decreased. Nerve conduction studies displayed that evidence of polyneuropathy was superimposed upon diffuse, uniform demyelinating, and sensorimotor polyneuropathy. Family genes revealed that each family member carried one of two heterozygous mutant genes. She has been discharged and is currently being followed up. This study found a compound heterozygous mutation in the ARSA gene associated with MLD and identified a novel missense mutation NM_000487: c.[154G>T], p.(Gly172Cys), rs74315271. This will provide a critical clue for prenatal diagnosis of the offspring in this family, and expand the mutation spectrum of MLD-related ARSA.
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Affiliation(s)
- Bing-lei Wang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Fen-lei Lu
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yu-chen Sun
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang, China
- *Correspondence: Yu-chen Sun
| | - Hui-juan Wang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
- Hui-juan Wang
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Levy G, Levin B, Engelhardt E. Echoes of William Gowers's concept of abiotrophy. JOURNAL OF THE HISTORY OF THE NEUROSCIENCES 2022; 31:425-449. [PMID: 34905460 DOI: 10.1080/0964704x.2021.1989649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Among William Gowers's many contributions to neurology, the concept of abiotrophy ("an essential failure of vitality") has been relatively overlooked. In this article, we review the echoes of Gowers's concept in neurology, ophthalmology, and aging research. We also argue that abiotrophy is broader than both heredodegeneration and neurodegeneration. Unlike the common view that it simply means premature aging, abiotrophy currently can be understood as a progressive degenerative process of a mature specialized tissue, which is nonsynchronous with normal aging and may affect organs or systems early in life, resulting from the age-dependent effects of genetic mutations or variants, even if environmental factors may also causally contribute to the process. Although the term has largely fallen out of use, there are likely to be everlasting echoes of Gowers's concept, through which he is to be considered a source of the modern thinking about the etiology and nosology of neurological diseases.
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Affiliation(s)
| | - Bruce Levin
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Eliasz Engelhardt
- Instituto de Neurologia Deolindo Couto and Instituto de Psiquiatria, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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30
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Winters SJ. Hypogonadism in Males With Genetic Neurodevelopmental Syndromes. J Clin Endocrinol Metab 2022; 107:e3974-e3989. [PMID: 35913018 DOI: 10.1210/clinem/dgac421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Indexed: 11/19/2022]
Abstract
Genetic syndromes that affect the nervous system may also disrupt testicular function, and the mechanisms for these effects may be interrelated. Most often neurological signs and symptoms predominate and hypogonadism remains undetected and untreated, while in other cases, a thorough evaluation of a hypogonadal male reveals previously unrecognized ataxia, movement disorder, muscle weakness, tremor, or seizures, leading to a syndromic diagnosis. Androgen deficiency in patients with neurological diseases may aggravate muscle weakness and fatigue and predispose patients to osteoporosis and obesity. The purpose of this mini review is to provide a current understanding of the clinical, biochemical, histologic, and genetic features of syndromes in which male hypogonadism and neurological dysfunction may coexist and may be encountered by the clinical endocrinologist.
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Affiliation(s)
- Stephen J Winters
- Division of Endocrinology, Metabolism & Diabetes, University of Louisville, Louisville, KY, USA
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31
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Ayrignac X, Carra-Dallière C, Marelli C, Taïeb G, Labauge P. Adult-Onset Genetic Central Nervous System Disorders Masquerading as Acquired Neuroinflammatory Disorders: A Review. JAMA Neurol 2022; 79:1069-1078. [PMID: 35969413 DOI: 10.1001/jamaneurol.2022.2141] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Importance Adult-onset genetic disorders may present with clinical and magnetic resonance imaging (MRI) features suggestive of acquired inflammatory diseases. An ever-growing number of potentially treatable adult-onset genetic neuroinflammatory disorders have been described in the past few years that need to be rapidly identified. Observations Adult-onset acquired neuroinflammatory disorders encompass a large group of central nervous system (CNS) diseases with varying presentation, MRI characteristics, and course, among which the most common is multiple sclerosis. Despite recent progress, including the discovery of specific autoantibodies, a significant number of adult-onset neuroinflammatory disorders with progressive or relapsing course still remain without a definite diagnosis. In addition, some patients with genetic disorders such as leukodystrophies, hemophagocytic lymphohistiocytosis, or genetic vasculopathies can mimic acquired neuroinflammatory disorders. These genetic disorders, initially described in pediatric populations, are increasingly detected in adulthood thanks to recent progress in molecular genetics and the larger availability of high-throughput sequencing technologies. Conclusions and Relevance Genetic adult-onset neuroinflammatory diseases are at the border between primary CNS inflammatory diseases and systemic disorders with multiorgan involvement and predominantly neurologic manifestations. Neurologists must be aware of the main clues and red flags so they can confirm a diagnosis early, when some of these genetic disorders can be successfully treated.
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Affiliation(s)
- Xavier Ayrignac
- Institute for Neurosciences of Montpellier, University of Montpellier, INSERM, Montpellier, France.,Department of Neurology, Montpellier University Hospital, Montpellier, France.,Reference Centre for Adult-Onset Leukoencephalopathy and Leukodystrophies, Montpellier University Hospital, Montpellier, France.,Reference Centre for Multiple Sclerosis, Montpellier University Hospital, Montpellier, France
| | - Clarisse Carra-Dallière
- Department of Neurology, Montpellier University Hospital, Montpellier, France.,Reference Centre for Adult-Onset Leukoencephalopathy and Leukodystrophies, Montpellier University Hospital, Montpellier, France.,Reference Centre for Multiple Sclerosis, Montpellier University Hospital, Montpellier, France
| | - Cecilia Marelli
- Department of Neurology, Montpellier University Hospital, Montpellier, France.,Molecular Mechanisms in Neurodegenerative Dementias, University of Montpellier, École Pratique des Hautes Études, INSERM, Montpellier, France.,Expert Centre for Neurogenetic Diseases and Adult Mitochondrial and Metabolic Diseases, Montpellier University Hospital, Montpellier, France
| | - Guillaume Taïeb
- Department of Neurology, Montpellier University Hospital, Montpellier, France
| | - Pierre Labauge
- Institute for Neurosciences of Montpellier, University of Montpellier, INSERM, Montpellier, France.,Department of Neurology, Montpellier University Hospital, Montpellier, France.,Reference Centre for Adult-Onset Leukoencephalopathy and Leukodystrophies, Montpellier University Hospital, Montpellier, France.,Reference Centre for Multiple Sclerosis, Montpellier University Hospital, Montpellier, France
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Baba H. [Introduction to Myelin Research]. YAKUGAKU ZASSHI 2022; 142:837-853. [PMID: 35908945 DOI: 10.1248/yakushi.21-00224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Myelin is a multilamellar membrane structure formed by oligodendrocytes in the central nervous system (CNS) and Schwann cells in the peripheral nervous system (PNS). It has been recognized as an insulator that is essential for the rapid and efficient propagation of action potentials by saltatory conduction. However, recently many studies have shown that myelin and myelin-forming cells interact with axons and regulate the nervous system far more actively than previously thought. For example, myelination changes axons dynamically and divides them into four distinct functional domains: node of Ranvier, paranode, juxtaparanode, and internode. Voltage-gated Na+ channels are clustered at the node, while K+ channels are at the juxtaparanode, and segregation of these channels by paranodal axoglial junction is necessary for proper axonal function. My research experience began at the neurology ward of the Niigata University Medical Hospital, where I saw a patient with peripheral neuropathy of unknown etiology more than 37 years ago. In the patient's serum, we found an autoantibody against a glycolipid enriched in the PNS. Since then, I have been interested in myelin because of its beautiful structure and unique roles in the nervous system. In this review, our recent studies related to CNS and PNS myelin are presented.
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Affiliation(s)
- Hiroko Baba
- Department of Molecular Neurobiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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33
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[Research advances in the clinical genetics of leukodystrophy in children]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2022; 24:711-716. [PMID: 35762440 PMCID: PMC9250391 DOI: 10.7499/j.issn.1008-8830.2202020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Leukodystrophy (LD) is a group of genetic heterogeneous diseases characterized by primary abnormalities in glial cells and myelin sheath, and it is a common nervous system disease in children and has significant genotype-phenotype correlation. In recent years, the improvement in high-throughput sequencing has changed the diagnostic and therapeutic mode of LD, and elaborative phenotype analysis, such as the collection of natural history and multimodal neuroimaging evaluation during development, also provides important information for subsequent genetic diagnosis. This article reviews LD from the perspective of clinical genetics, in order to improve the awareness of this disease among pediatricians in China.
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Ferrer I. The Primary Microglial Leukodystrophies: A Review. Int J Mol Sci 2022; 23:ijms23116341. [PMID: 35683020 PMCID: PMC9181167 DOI: 10.3390/ijms23116341] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/03/2022] [Indexed: 11/17/2022] Open
Abstract
Primary microglial leukodystrophy or leukoencephalopathy are disorders in which a genetic defect linked to microglia causes cerebral white matter damage. Pigmented orthochromatic leukodystrophy, adult-onset orthochromatic leukodystrophy associated with pigmented macrophages, hereditary diffuse leukoencephalopathy with (axonal) spheroids, and adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) are different terms apparently used to designate the same disease. However, ALSP linked to dominantly inherited mutations in CSF1R (colony stimulating factor receptor 1) cause CSF-1R-related leukoencephalopathy (CRP). Yet, recessive ALSP with ovarian failure linked to AARS2 (alanyl-transfer (t)RNA synthase 2) mutations (LKENP) is a mitochondrial disease and not a primary microglial leukoencephalopathy. Polycystic membranous lipomembranous osteodysplasia with sclerosing leukoencephalopathy (PLOSL; Nasu–Hakola disease: NHD) is a systemic disease affecting bones, cerebral white matter, selected grey nuclei, and adipose tissue The disease is caused by mutations of one of the two genes TYROBP or TREM2, identified as PLOSL1 and PLOSL2, respectively. TYROBP associates with receptors expressed in NK cells, B and T lymphocytes, dendritic cells, monocytes, macrophages, and microglia. TREM2 encodes the protein TREM2 (triggering receptor expressed on myeloid cells 2), which forms a receptor signalling complex with TYROBP in macrophages and dendritic cells. Rather than pure microglial leukoencephalopathy, NHD can be considered a multisystemic “immunological” disease.
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Affiliation(s)
- Isidro Ferrer
- Network Centre of Biomedical Research of Neurodegenerative Diseases (CIBERNED), Department of Pathology and Experimental Therapeutics, Bellvitge Biomedical Research Institute (IDIBELL), University of Barcelona, 08907 Barcelona, L'Hospitalet de Llobregat, Spain
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35
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Brainstem lesions: MRI review of standard morphological sequences. Acta Neurol Belg 2022; 122:597-613. [PMID: 35428930 DOI: 10.1007/s13760-022-01943-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 03/23/2022] [Indexed: 11/01/2022]
Abstract
MRI signal changes in the brainstem are observed in a multitude of disorders including vascular diseases, neoplastic lesions, degenerative diseases, inflammatory disorders, metabolic diseases, infections, and trauma. In some diseases, brainstem involvement is typical and sometimes isolated, while in other diseases, brainstem lesions are only observed occasionally in the presence of other typical extra-brainstem abnormalities. In this review, we will discuss the MRI characteristics of brainstem lesions observed in different disorders associated with frequent and less frequent brainstem involvement. Identification of the origin of the brainstem lesion depends on the exact localisation of the lesion(s) inside the brainstem, the presence and the characteristics of associated lesions seen outside the brainstem, the signal changes on different MRI sequences, the evolution over time of the radiological abnormalities, the history and clinical state of the patient, and other radiological and non-radiological examinations.
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Jiang J, Li W, Wang X, Du Z, Chen J, Liu Y, Li W, Lu Z, Wang Y, Xu J. Two Novel Intronic Mutations in the CSF1R Gene in Two Families With CSF1R-Microglial Encephalopathy. Front Cell Dev Biol 2022; 10:902067. [PMID: 35721475 PMCID: PMC9198639 DOI: 10.3389/fcell.2022.902067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Objective: To describe two novel heterozygous splicing variants of the CSF1R gene responsible for CSF1R-microglial encephalopathy in two unrelated Han Chinese families and further explore the relationship between the pathological and neuroimaging findings in this disease.Methods: The demographic data, detailed medical history, and clinical manifestations of two unrelated Han families with CSF1R-microglial encephalopathy were recorded. Some family members also underwent detailed neuropsychological evaluation, neuroimaging, and genetic testing. The probands underwent whole-exome sequencing (WES) or next-generation sequencing (NGS) to confirm the diagnosis. The findings were substantiated using Sanger sequencing, segregation analysis, and phenotypic reevaluation.Results: Both families presented with a dominant hereditary pattern. Five of 27 individuals (four generations) from the first family, including the proband and his sister, father, uncle, and grandmother, presented with cognitive impairments clinically during their respective lifetimes. Brain magnetic resonance imaging (MRI) depicted symmetric, confluent, and diffuse deep white matter changes, atrophy of the frontoparietal lobes, and thinning of the corpus callosum. The proband’s brother remained asymptomatic; brain MRI revealed minimal white matter changes, but pseudo-continuous arterial spin labeling (pCASL) demonstrated a marked reduction in the cerebral blood flow (CBF) in the bilateral deep white matter and corpus callosum. Seven family members underwent WES, which identified a novel splice-site heterozygous mutation (c.2319+1C>A) in intron 20 of the CSF1R gene in four members. The proband from the second family presented with significant cognitive impairment and indifference; brain MRI depicted symmetric diffuse deep white matter changes and thinning of the corpus callosum. The proband’s mother reported herself to be asymptomatic, while neuropsychological evaluation suggested mild cognitive impairment, and brain MRI demonstrated abnormal signals in the bilateral deep white matter and corpus callosum. NGS of 55 genes related to hereditary leukodystrophy was performed for three members, which confirmed a novel splice-site heterozygous mutation (c.1858+5G>A) in intron 13 of the CSF1R gene in two members.Conclusions: Our study identified two novel splicing mutation sites in the CSF1R gene within two independent Chinese families with CSF1R-microglial encephalopathy, broadening the genetic spectrum of CSF1R-microglial encephalopathy and emphasizing the value of pCASL for early detection of this disease.
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Affiliation(s)
- Jiwei Jiang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Wenyi Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Xiaohong Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental and Translational Non-coding RNA Research, Yangzhou University, Yangzhou, China
| | - Zhongli Du
- National Center for Clinical Laboratories, Institute of Geriatric Medicine, Beijing Hospital/National Center of Gerontology, Chinese Academy of Medical Sciences, Beijing, China
| | - Jinlong Chen
- Division of Neurology, Department of Geriatrics, National Clinical Key Specialty, Guangzhou First People’s Hospital, School of Medicine, South China University of Technology, Guangzhou, China
| | - Yaou Liu
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wei Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Zhonghua Lu
- Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, The Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yanli Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Jun Xu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- *Correspondence: Jun Xu,
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Costei C, Barbarosie M, Bernard G, Brais B, La Piana R. Adult Hereditary White Matter Diseases With Psychiatric Presentation: Clinical Pointers and MRI Algorithm to Guide the Diagnostic Process. J Neuropsychiatry Clin Neurosci 2022; 33:180-193. [PMID: 33951919 DOI: 10.1176/appi.neuropsych.20110294] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The investigators aimed to provide clinical and MRI guidelines for determining when genetic workup should be considered in order to exclude hereditary leukoencephalopathies in affected patients with a psychiatric presentation. METHODS A systematic literature review was conducted, and clinical cases are provided. Given the central role of MRI pattern recognition in the diagnosis of white matter disorders, the investigators adapted an MRI algorithm that guides the interpretation of MRI findings and thus directs further investigations, such as genetic testing. RESULTS Twelve genetic leukoencephalopathies that can present with psychiatric symptoms were identified. As examples of presentations that can occur in clinical practice, five clinical vignettes from patients assessed at a referral center for adult genetic leukoencephalopathies are provided. CONCLUSIONS Features such as drug-resistant symptoms, presence of long-standing somatic features, trigger events, consanguinity, and positive family history should orient the clinician toward diagnostic workup to exclude the presence of a genetic white matter disorder. The identification of MRI white matter abnormalities, especially when presenting a specific pattern of involvement, should prompt genetic testing for known forms of genetic leukoencephalopathies.
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Affiliation(s)
- Catalina Costei
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal (Costei, Brais, La Piana); Department of Psychiatry, McGill University (Barbarosie); Departments of Neurology and Neurosurgery, Pediatrics and Human Genetics, McGill University (Bernard); Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal (Bernard); Child Health and Human Development Program, Research Institute of the McGill University Health Center (Bernard); and Department of Diagnostic Radiology, McGill University (La Piana)
| | - Michaela Barbarosie
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal (Costei, Brais, La Piana); Department of Psychiatry, McGill University (Barbarosie); Departments of Neurology and Neurosurgery, Pediatrics and Human Genetics, McGill University (Bernard); Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal (Bernard); Child Health and Human Development Program, Research Institute of the McGill University Health Center (Bernard); and Department of Diagnostic Radiology, McGill University (La Piana)
| | - Geneviève Bernard
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal (Costei, Brais, La Piana); Department of Psychiatry, McGill University (Barbarosie); Departments of Neurology and Neurosurgery, Pediatrics and Human Genetics, McGill University (Bernard); Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal (Bernard); Child Health and Human Development Program, Research Institute of the McGill University Health Center (Bernard); and Department of Diagnostic Radiology, McGill University (La Piana)
| | - Bernard Brais
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal (Costei, Brais, La Piana); Department of Psychiatry, McGill University (Barbarosie); Departments of Neurology and Neurosurgery, Pediatrics and Human Genetics, McGill University (Bernard); Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal (Bernard); Child Health and Human Development Program, Research Institute of the McGill University Health Center (Bernard); and Department of Diagnostic Radiology, McGill University (La Piana)
| | - Roberta La Piana
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal (Costei, Brais, La Piana); Department of Psychiatry, McGill University (Barbarosie); Departments of Neurology and Neurosurgery, Pediatrics and Human Genetics, McGill University (Bernard); Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Center, Montreal (Bernard); Child Health and Human Development Program, Research Institute of the McGill University Health Center (Bernard); and Department of Diagnostic Radiology, McGill University (La Piana)
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38
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Liu YH, Chou YT, Chang FP, Lee WJ, Guo YC, Chou CT, Huang HC, Mizuguchi T, Chou CC, Yu HY, Yu KW, Wu HM, Tsai PC, Matsumoto N, Lee YC, Liao YC. Neuronal intranuclear inclusion disease in patients with adult-onset non-vascular leukoencephalopathy. Brain 2022; 145:3010-3021. [PMID: 35411397 DOI: 10.1093/brain/awac135] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 11/12/2022] Open
Abstract
Neuronal intranuclear inclusion disease (NIID), caused by an expansion of GGC repeats in the 5'-untranslated region of NOTCH2NLC, is an important but underdiagnosed cause of adult-onset leukoencephalopathies. The present study aimed to investigate the prevalence, clinical spectrum, and brain MRI characteristics of NIID in adult-onset nonvascular leukoencephalopathies and assess the diagnostic performance of neuroimaging features. One hundred and sixty-one unrelated Taiwanese patients with genetically undetermined nonvascular leukoencephalopathies were screened for the NOTCH2NLC GGC repeat expansions using fragment analysis, repeat-primed PCR, southern blot analysis and/or nanopore sequencing with Cas9-mediated enrichment. Among them, 32 (19.9%) patients had an expanded NOTCH2NLC allele and diagnosed with NIID. We enrolled another two affected family members from one patient for further analysis. The size of the expanded NOTCH2NLC GGC repeats in the 34 patients ranged from 73 to 323 repeats. Skin biopsy from five patients all showed eosinophilic, p62-positive intranuclear inclusions in the sweat gland cells and dermal adipocytes. Among the 34 NIID patents presenting with nonvascular leukoencephalopathies, the median age at symptom onset was 61 years (range, 41-78 years) and the initial presentations included cognitive decline (44.1%; 15/34), acute encephalitis-like episodes (32.4%; 11/34), limb weakness (11.8%, 4/34), and parkinsonism (11.8%; 4/34). Cognitive decline (64.7%; 22/34) and acute encephalitis-like episodes (55.9%; 19/34) were also the most common overall manifestations. Two-thirds of the patients had either bladder dysfunction or visual disturbance. Comparing the brain MRI features between the NIID patients and individuals with other undetermined leukoencephalopathies, corticomedullary junction curvilinear lesion on diffusion weighted imaging (DWI) was the best biomarker to diagnose NIID with high specificity (98.4%) and sensitivity (88.2%). However, such DWI abnormality was absent in 11.8% of the NIID patients. When only fluid-attenuated inversion recovery images were available, presence of white matter hyperintensity lesions (WMH) either in paravermis or middle cerebellar peduncles also favored the diagnosis of NIID with a specificity of 85.3% and a sensitivity of 76.5%. Among the ten patients' MRI performed within 5 days of the onset of acute encephalitis-like episodes, five showed cortical DWI hyperintense lesions and two revealed focal brain edema. In conclusion, NIID accounts for 19.9% (32/161) of patients with adult-onset genetically undiagnosed nonvascular leukoencephalopathies in Taiwan. Half of the NIID patients ever developed encephalitis-like episodes with restricted diffusion in the cortical regions at the acute stage DWI. Corticomedullary junction hyperintense lesions, WMH in paravermis or middle cerebellar peduncles, bladder dysfunction and visual disturbance are useful hints to diagnose NIID.
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Affiliation(s)
- Yi-Hong Liu
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Ying-Tsen Chou
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Fu-Pang Chang
- Department of Pathology and Laboratory Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan.,Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Wei-Ju Lee
- Neurological Institute, Taichung Veterans General Hospital, Taichung 40705, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yuh-Cherng Guo
- Department of Neurology, China Medical University Hospital, Taichung 404332, Taiwan.,School of Medicine, College of Medicine, China Medical University, Taichung 404333, Taiwan
| | - Cheng-Ta Chou
- Neurological Institute, Taichung Veterans General Hospital, Taichung 40705, Taiwan.,Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Hui-Chun Huang
- Department of Neurology, China Medical University Hospital, Taichung 404332, Taiwan.,School of Medicine, College of Medicine, China Medical University, Taichung 404333, Taiwan
| | - Takeshi Mizuguchi
- Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Chien-Chen Chou
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Hsiang-Yu Yu
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Kai-Wei Yu
- Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Department of Radiology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Hsiu-Mei Wu
- Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Department of Radiology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Pei-Chien Tsai
- Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan
| | - Naomichi Matsumoto
- Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Yi-Chung Lee
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Yi-Chu Liao
- Department of Neurology, Taipei Veterans General Hospital, Taipei 11217, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan.,Brain Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
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39
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Wu J, Cao Y, Li M, Li B, Jia X, Cao L. Altered intrinsic brain activity in patients with CSF1R-related leukoencephalopathy. Brain Imaging Behav 2022; 16:1842-1853. [PMID: 35389179 DOI: 10.1007/s11682-022-00646-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2022] [Indexed: 11/26/2022]
Abstract
CSF1R-related leukoencephalopathy is an adult-onset white matter disease with high disability and mortality, while little is known about its pathogenesis. This study introduced amplitude of low-frequency fluctuations (ALFF) and regional homogeneity (ReHo) based on resting-state functional magnetic resonance imaging(rsfMRI) to compare the spontaneous brain activities of patients and healthy controls, aiming to enhance our understanding of the disease. RsfMRI was performed on 16 patients and 23 healthy controls, and preprocessed for calculation of ALFF and ReHo. Permutation tests with threshold free cluster enhancement (TFCE) was applied for comparison (number of permutations = 5,000). The TFCE significance threshold was set at [Formula: see text] < 0.05. In addition, 10 was set as the minimum cluster size. Compared to healthy controls, the patient group showed decreased ALFF in right paracentral lobule, and increased ALFF in bilateral insula, hippocampus, thalamus, supramarginal and precentral gyrus, right inferior, middle and superior frontal gyrus, right superior and middle occipital gyrus, as well as left parahippocampal gyrus, fusiform, middle occipital gyrus and angular gyrus. ReHo was decreased in right supplementary motor area, paracentral lobule and precentral gyrus, while increased in right superior occipital gyrus and supramarginal gyrus, left parahippocampal gyrus, hippocampus, fusiform, middle occipital gyrus and angular gyrus, as well as bilateral middle occipital gyrus and midbrain. These results revealed altered spontaneous brain activities in CSF1R-related leukoencephalopathy, especially in limbic system and motor cortex, which may shed light on underlying mechanisms.
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Affiliation(s)
- Jingying Wu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yikang Cao
- School of Information and Electronics Technology, Jiamusi University, Jiamusi, China
| | - Mengting Li
- School of Teacher Education, Zhejiang Normal University, Jinhua, China
| | - Binyin Li
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xize Jia
- Centre for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Li Cao
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated To Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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40
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Borja N, Bivona S, Peart LS, Johnson B, Gonzalez J, Barbouth D, Moore H, Guo S, Bademci G, Tekin M. Genome sequencing reveals novel noncoding variants in PLA2G6 and LMNB1 causing progressive neurologic disease. Mol Genet Genomic Med 2022; 10:e1892. [PMID: 35247231 PMCID: PMC9000935 DOI: 10.1002/mgg3.1892] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 12/18/2022] Open
Abstract
Neurodegenerative disorders and leukodystrophies are progressive neurologic conditions that can occur following the disruption of intricately coordinated patterns of gene expression. Exome sequencing has been adopted as an effective diagnostic tool for determining the underlying genetic etiology of Mendelian neurologic disorders, however genome sequencing offer advantages in its ability to identify and characterize copy number, structural, and sequence variants in noncoding regions. Genome sequencing from peripheral leukocytes was performed on two patients with progressive neurologic disease of unknown etiology following negative genetic investigations including exome sequencing. RNA sequencing from peripheral blood was performed to determine gene expression patterns in one of the patients. Potential causative variants were matched to the patients' clinical presentation. The first proband was found to be heterozygous for a likely pathogenic missense variant in PLA2G6 (c.386T>C; p.Leu129Pro) and have an additional deep intronic variant in PLA2G6 (c.2035-926G>A). RNA sequencing indicated this latter variant created a splice acceptor site leading to the incorporation of a pseudo-exon introducing a premature termination codon. The second proband was heterozygous for a 261 kb deletion upstream of LMNB1 that included an enhancer region. Previous reports of copy number variants spanning this region of cis-acting regulatory elements corroborated its pathogenicity. When combined with clinical presentations, these findings led to a definitive diagnosis of autosomal recessive infantile neuroaxonal dystrophy and autosomal dominant adult-onset demyelinating leukodystrophy, respectively. In patients with progressive neurologic disease of unknown etiology, genome sequencing with the addition of RNA analysis where appropriate should be considered for the identification of causative noncoding pathogenic variants.
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Affiliation(s)
- Nicholas Borja
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Stephanie Bivona
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Lé Shon Peart
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Brittany Johnson
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Joanna Gonzalez
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Deborah Barbouth
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Henry Moore
- Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Shengru Guo
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Guney Bademci
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Mustafa Tekin
- John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, USA
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41
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Fadiga L, Melo M, Saraiva J, Paiva I. The clinical spectrum of X-linked adrenoleukodystrophy: from Addison's-only in men to middle-age neurologic manifestations in women. Hormones (Athens) 2022; 21:33-40. [PMID: 34652632 DOI: 10.1007/s42000-021-00325-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 09/20/2021] [Indexed: 10/20/2022]
Abstract
X-linked adrenoleukodystrophy (X-ALD) is caused by a mutation in the ABCD1 gene which encodes for a peroxisomal very long-chain fatty acid (VLCFA) transporter. Clinically, X-ALD can present a wide range of phenotypes, from slowly progressive myelopathy to rapid demyelination of brain white matter (cerebral X-ALD-CALD). Adrenocortical insufficiency (AI) occurs mainly in the pediatric age group, and it can be the first manifestation of the disease. Female carriers may also develop manifestations of myelopathy, but later in life. We present two cases of patients who show the heterogeneous clinical manifestations of X-ALD. Case 1 was a man with AI diagnosed at 6 years old and with the first manifestations of myelopathy at 44 years old, which led to the diagnosis of X-ALD. At 47 years, he developed rapidly progressive CALD. Case 2 was a woman with progressive spastic gait disturbance that started at 49 years old. The diagnosis of X-ALD was confirmed at 54 years old after the discovery of a family history of the disease. Mild progression of the neurologic manifestations was noted, but with no signs of AI nor CALD. She is currently 60 years old and under surveillance. We review the current knowledge on X-ALD as concerns its genetic and pathophysiological mechanisms, clinical presentations, diagnosis, treatment, and follow-up. This condition is a real diagnostic challenge. The early detection of AI and CALD, potentially life-threatening complications in men, is very difficult. The surveillance of these complications in female patients still raises controversy.
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Affiliation(s)
- Lúcia Fadiga
- Endocrinology, Diabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra, Portugal.
| | - Miguel Melo
- Endocrinology, Diabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Joana Saraiva
- Endocrinology, Diabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Isabel Paiva
- Endocrinology, Diabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra, Portugal
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42
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Schlüter A, Rodríguez-Palmero A, Verdura E, Vélez-Santamaría V, Ruiz M, Fourcade S, Planas-Serra L, Martínez JJ, Guilera C, Girós M, Artuch R, Yoldi ME, O'Callaghan M, García-Cazorla A, Armstrong J, Marti I, Mondragón Rezola E, Redin C, Mandel JL, Conejo D, Sierra-Córcoles C, Beltrán S, Gut M, Vázquez E, Del Toro M, Troncoso M, Pérez-Jurado LA, Gutiérrez-Solana LG, López de Munain A, Casasnovas C, Aguilera-Albesa S, Macaya A, Pujol A. Diagnosis of Genetic White Matter Disorders by Singleton Whole-Exome and Genome Sequencing Using Interactome-Driven Prioritization. Neurology 2022; 98:e912-e923. [PMID: 35012964 PMCID: PMC8901178 DOI: 10.1212/wnl.0000000000013278] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 12/21/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Genetic white matter disorders (GWMD) are of heterogeneous origin, with >100 causal genes identified to date. Classic targeted approaches achieve a molecular diagnosis in only half of all patients. We aimed to determine the clinical utility of singleton whole-exome sequencing and whole-genome sequencing (sWES-WGS) interpreted with a phenotype- and interactome-driven prioritization algorithm to diagnose GWMD while identifying novel phenotypes and candidate genes. METHODS A case series of patients of all ages with undiagnosed GWMD despite extensive standard-of-care paraclinical studies were recruited between April 2017 and December 2019 in a collaborative study at the Bellvitge Biomedical Research Institute (IDIBELL) and neurology units of tertiary Spanish hospitals. We ran sWES and WGS and applied our interactome-prioritization algorithm based on the network expansion of a seed group of GWMD-related genes derived from the Human Phenotype Ontology terms of each patient. RESULTS We evaluated 126 patients (101 children and 25 adults) with ages ranging from 1 month to 74 years. We obtained a first molecular diagnosis by singleton WES in 59% of cases, which increased to 68% after annual reanalysis, and reached 72% after WGS was performed in 16 of the remaining negative cases. We identified variants in 57 different genes among 91 diagnosed cases, with the most frequent being RNASEH2B, EIF2B5, POLR3A, and PLP1, and a dual diagnosis underlying complex phenotypes in 6 families, underscoring the importance of genomic analysis to solve these cases. We discovered 9 candidate genes causing novel diseases and propose additional putative novel candidate genes for yet-to-be discovered GWMD. DISCUSSION Our strategy enables a high diagnostic yield and is a good alternative to trio WES/WGS for GWMD. It shortens the time to diagnosis compared to the classical targeted approach, thus optimizing appropriate management. Furthermore, the interactome-driven prioritization pipeline enables the discovery of novel disease-causing genes and phenotypes, and predicts novel putative candidate genes, shedding light on etiopathogenic mechanisms that are pivotal for myelin generation and maintenance.
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Affiliation(s)
- Agatha Schlüter
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Agustí Rodríguez-Palmero
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Edgard Verdura
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Valentina Vélez-Santamaría
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Montserrat Ruiz
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Stéphane Fourcade
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Laura Planas-Serra
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Juan José Martínez
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Cristina Guilera
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Marisa Girós
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Rafael Artuch
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - María Eugenia Yoldi
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Mar O'Callaghan
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Angels García-Cazorla
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Judith Armstrong
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Itxaso Marti
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Elisabet Mondragón Rezola
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Claire Redin
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Jean Louis Mandel
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - David Conejo
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Concepción Sierra-Córcoles
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Sergi Beltrán
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Marta Gut
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Elida Vázquez
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Mireia Del Toro
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Mónica Troncoso
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Luis A Pérez-Jurado
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Luis G Gutiérrez-Solana
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Adolfo López de Munain
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Carlos Casasnovas
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Sergio Aguilera-Albesa
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Alfons Macaya
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain
| | - Aurora Pujol
- From the Neurometabolic Diseases Laboratory (A.S., A.R.-P., E. Verdura, V.V.-S., M.R., S.F., L.P.-S., J.J.M., C.G., C.C., A.P.), Bellvitge Biomedical Research Institute (IDIBELL); Instituto de Salud Carlos III (ISCIII) (A.S., A.R.-P., E. Verdura, M.R., S.F., L.P.-S., J.J.M., C.G., R.A., M.O., A.G.-C., J.A., M.d.T., L.A.P.-J., A.M., A.P.) and Secció d'Errors Congènits del Metabolisme-IBC, Servei de Bioquímica i Genètica Molecular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) (M. Girós), Center for Biomedical Research on Rare Diseases (CIBERER); Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol (A.R.-P.), and Pediatric Neurology Research Group, Vall d'Hebron Research Institute (A.M.), and Pediatric Neurology Department, Vall d'Hebron University Hospital (M.d.T., A.M.), Universitat Autònoma de Barcelona; Neuromuscular Unit, Neurology Department (V.V.-S., C.C.), Hospital Universitari de Bellvitge and Hospitalet de Llobregat, Universitat de Barcelona; Institut de Recerca Pediàtrica (R.A., M.O., A.G.-C.) and Molecular and Genetics Medicine Section (J.A.), Hospital Sant Joan de Déu (IRP-HSJD), Barcelona; Pediatric Neurology Unit, Department of Pediatrics (M.E.Y., S.A.-A.), Navarra Health Service, Navarrabiomed Research Foundation; Departments of Neuropediatrics (I.M.) and Neurology (E.M.R., A.L.d.M.), Hospital Universitario Donostia; Biodonostia Health Research Institute (Biodonostia HRI) (I.M., E.M.R., A.L.d.M.); University of the Basque Country (UPV-EHU) (I.M., A.L.d.M.), San Sebastian; Centro de Investigación Biomédica en Red para Enfermedades Neurodegenerativas (CIBERNED) (I.M., E.M.R., A.L.d.M.), Carlos III Health Institute, Madrid, Spain; Département de Médecine Translationnelle et Neurogénétique (C.R., J.L.M.), IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch; Laboratoire de Diagnostic Génétique (J.L.M.), Hôpitaux Universitaires de Strasbourg; Chaire de Génétique Humaine (J.L.M.), Collège de France, Illkirch; Complejo Asistencial Universitario de Burgos (D.C.); Department of Paediatric Neurology (C.S.-C.), Complejo Hospitalario Jaén; CNAG-CRG, Centre for Genomic Regulation (CRG) (S.B., M. Gut), Barcelona Institute of Science and Technology (BIST); Department of Pediatric Radiology (E. Vázquez), Hospital Materno-Infantil Vall d'Hebrón, Barcelona, Spain; Pediatric Neurology (M.T.), Hospital Clínico San Borja Arriarán, Central Campus Universidad de Chile; Genetics Service (L.A.P.-J.), Hospital del Mar Research Institute (IMIM); Department of Experimental and Health Sciences (L.A.P.-J.), Universitat Pompeu Fabra, Barcelona; Department of Paediatric Neurology (L.G.G.-S.), Children's University Hospital Niño Jesús, Madrid; and Catalan Institution of Research and Advanced Studies (ICREA) (A.P.), Barcelona, Spain.
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Papapetropoulos S, Pontius A, Finger E, Karrenbauer V, Lynch DS, Brennan M, Zappia S, Koehler W, Schoels L, Hayer SN, Konno T, Ikeuchi T, Lund T, Orthmann-Murphy J, Eichler F, Wszolek ZK. Adult-Onset Leukoencephalopathy With Axonal Spheroids and Pigmented Glia: Review of Clinical Manifestations as Foundations for Therapeutic Development. Front Neurol 2022; 12:788168. [PMID: 35185751 PMCID: PMC8850408 DOI: 10.3389/fneur.2021.788168] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 12/14/2021] [Indexed: 12/11/2022] Open
Abstract
A comprehensive review of published literature was conducted to elucidate the genetics, neuropathology, imaging findings, prevalence, clinical course, diagnosis/clinical evaluation, potential biomarkers, and current and proposed treatments for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP), a rare, debilitating, and life-threatening neurodegenerative disorder for which disease-modifying therapies are not currently available. Details on potential efficacy endpoints for future interventional clinical trials in patients with ALSP and data related to the burden of the disease on patients and caregivers were also reviewed. The information in this position paper lays a foundation to establish an effective clinical rationale and address the clinical gaps for creation of a robust strategy to develop therapeutic agents for ALSP, as well as design future clinical trials, that have clinically meaningful and convergent endpoints.
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Affiliation(s)
- Spyros Papapetropoulos
- Vigil Neuroscience, Inc, Cambridge, MA, United States
- Massachusetts General Hospital, Boston, MA, United States
| | | | - Elizabeth Finger
- Clinical Neurological Sciences, Western University, London, ON, Canada
| | - Virginija Karrenbauer
- Neurology Medical Unit, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - David S. Lynch
- National Hospital for Neurology and Neurosurgery, London, United Kingdom
| | | | | | | | - Ludger Schoels
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research and Center of Neurology, University Hospital Tuebingen, Tuebingen, Germany
- German Research Center for Neurodegenerative Diseases, Tuebingen, Germany
| | - Stefanie N. Hayer
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research and Center of Neurology, University Hospital Tuebingen, Tuebingen, Germany
- German Research Center for Neurodegenerative Diseases, Tuebingen, Germany
| | - Takuya Konno
- Brain Research Institute, Niigata University, Niigata, Japan
| | - Takeshi Ikeuchi
- Brain Research Institute, Niigata University, Niigata, Japan
| | - Troy Lund
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
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44
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Goodison W, Baron F, Seary C, Murphy E, Lachmann R, Stevenson VL. Functional electrical stimulation to aid walking in patients with adrenomyeloneuropathy: A case study and observational series. JIMD Rep 2022; 63:11-18. [PMID: 35028266 PMCID: PMC8743338 DOI: 10.1002/jmd2.12254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/22/2021] [Accepted: 10/06/2021] [Indexed: 11/17/2022] Open
Abstract
Adrenomyeloneuropathy (AMN) is a rare inherited condition where affected individuals develop slowly progressive spastic paraparesis with a gradual decline in walking ability. There is no cure for AMN and treatment focuses on supportive measures and aids. One treatment option is functional electrical stimulation (FES), a treatment, approved by The National Institute for Health and Care Excellence (NICE), for managing foot drop in upper motor neuron disorders. Limited evidence exists for its use in AMN patients. We describe the effects of FES in an individual case and more broadly within a cohort of 21 patients successfully treated with FES. Patients with AMN referred for FES typically report frequent falls (71%) and foot drop (57%) as the most common barriers to walking. When using FES, walking speed at baseline (0.70 m/s [SD = 0.2]) was maintained at the 2-year review (0.68 m/s [SD = 0.2]) with a persistent orthotic effect (improvement in walking speed when device on vs. off) seen from wearing FES over the same 2-year period (11%-19%). Patient walking satisfaction (visual analogue scale: 0 - very dissatisfied; 10 - very satisfied) was also greater when comparing no-FES versus FES over the same period (Year 1: 2.5 vs. 7.7; Year 2: 2.1 vs. 6.1). FES is not effective in all patients. Twelve patients referred found no benefit from the device; although there was no clear evidence, this was related to the degree of AMN associated peripheral neuropathy. However, FES is a safe, cost-effective treatment option and should be considered, along with assessment in a multidisciplinary clinic, for all AMN patients with walking difficulties.
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Affiliation(s)
- William Goodison
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
| | - Fred Baron
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
| | - Coralie Seary
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
| | - Elaine Murphy
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
- Charles Dent Metabolic UnitNational Hospital for Neurology and NeurosurgeryLondonUK
| | - Robin Lachmann
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
- Charles Dent Metabolic UnitNational Hospital for Neurology and NeurosurgeryLondonUK
| | - Valerie L. Stevenson
- National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK
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45
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Ding B. Novel insights into the pathogenesis of DYT1 dystonia from induced patient-derived neurons. Neural Regen Res 2022; 17:561-562. [PMID: 34380890 PMCID: PMC8504368 DOI: 10.4103/1673-5374.320978] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Baojin Ding
- Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, USA
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46
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Progressive Cognitive and Behavioral Changes With Leukodystrophy due to ABCD1 Gene Mutation. Dement Neurocogn Disord 2022; 21:162-164. [DOI: 10.12779/dnd.2022.21.4.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/09/2022] Open
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47
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Verdura E, Rodríguez-Palmero A, Vélez-Santamaria V, Planas-Serra L, de la Calle I, Raspall-Chaure M, Roubertie A, Benkirane M, Saettini F, Pavinato L, Mandrile G, O'Leary M, O'Heir E, Barredo E, Chacón A, Michaud V, Goizet C, Ruiz M, Schlüter A, Rouvet I, Sala-Coromina J, Fossati C, Iascone M, Canonico F, Marcé-Grau A, de Souza P, Adams DR, Casasnovas C, Rehm HL, Mefford HC, González Gutierrez-Solana L, Brusco A, Koenig M, Macaya A, Pujol A. Biallelic PI4KA variants cause a novel neurodevelopmental syndrome with hypomyelinating leukodystrophy. Brain 2021; 144:2659-2669. [PMID: 34415322 PMCID: PMC8557332 DOI: 10.1093/brain/awab124] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 11/14/2022] Open
Abstract
Phosphoinositides are lipids that play a critical role in processes such as cellular signalling, ion channel activity and membrane trafficking. When mutated, several genes that encode proteins that participate in the metabolism of these lipids give rise to neurological or developmental phenotypes. PI4KA is a phosphoinositide kinase that is highly expressed in the brain and is essential for life. Here we used whole exome or genome sequencing to identify 10 unrelated patients harbouring biallelic variants in PI4KA that caused a spectrum of conditions ranging from severe global neurodevelopmental delay with hypomyelination and developmental brain abnormalities to pure spastic paraplegia. Some patients presented immunological deficits or genito-urinary abnormalities. Functional analyses by western blotting and immunofluorescence showed decreased PI4KA levels in the patients’ fibroblasts. Immunofluorescence and targeted lipidomics indicated that PI4KA activity was diminished in fibroblasts and peripheral blood mononuclear cells. In conclusion, we report a novel severe metabolic disorder caused by PI4KA malfunction, highlighting the importance of phosphoinositide signalling in human brain development and the myelin sheath.
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Affiliation(s)
- Edgard Verdura
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Agustí Rodríguez-Palmero
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Pediatric Neurology Unit, Department of Pediatrics, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Catalonia, Spain
| | - Valentina Vélez-Santamaria
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Neuromuscular Unit, Neurology Department, Hospital Universitari de Bellvitge, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Laura Planas-Serra
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Irene de la Calle
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain
| | - Miquel Raspall-Chaure
- Neurology Research Group, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.,Department of Paediatric Neurology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Agathe Roubertie
- Département de Neuropédiatrie, Hôpital Gui de Chauliac Pôle Neurosciences Tête et Cou, Montpellier, France.,INSERM U1051, Institut des Neurosciences de Montpellier, Montpellier, France
| | - Mehdi Benkirane
- Laboratoire de Génétique de Maladies Rares EA7402, Institut Universitaire de Recherche Clinique, Université de Montpellier, CHU Montpellier, CEDEX 5, 34295 Montpellier, France
| | - Francesco Saettini
- Paediatric Hematology Department, Fondazione MBBM, University of Milano Bicocca, Monza, Italy
| | - Lisa Pavinato
- Department of Medical Sciences, University of Torino, 10126 Torino, Italy
| | - Giorgia Mandrile
- Thalassemia Centre and Medical Genetics Unit, San Luigi Gonzaga University Hospital, Orbassano, Italy
| | - Melanie O'Leary
- Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Emily O'Heir
- Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Estibaliz Barredo
- Neuropediatric Department, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Almudena Chacón
- Neuropediatric Department, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Vincent Michaud
- Molecular Genetics Laboratory, Bordeaux University Hospital, Bordeaux, Aquitaine, France.,INSERM U1211, Rare Diseases Laboratory: Genetics and Metabolism, University of Bordeaux, Talence, Aquitaine, France
| | - Cyril Goizet
- INSERM U1211, Rare Diseases Laboratory: Genetics and Metabolism, University of Bordeaux, Talence, Aquitaine, France.,Reference Center for Rare Neurogenetic Diseases, Department of Medical Genetics, University Hospital Centre Bordeaux Pellegrin Hospital Group, Bordeaux, Aquitaine, France
| | - Montserrat Ruiz
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Agatha Schlüter
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Isabelle Rouvet
- Cellular Biotechnology Department and Biobank, Hospices Civils de Lyon, CHU de Lyon, Lyon, France
| | - Julia Sala-Coromina
- Neurology Research Group, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.,Department of Paediatric Neurology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Chiara Fossati
- Department of Paediatrics, Fondazione MBBM, Monza, Italy
| | - Maria Iascone
- Molecular Genetics Laboratory, USSD LGM, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - Francesco Canonico
- Department of Neuroradiology, University of Milan-Bicocca, San Gerardo Hospital, ASST di Monza, Monza, Italy
| | - Anna Marcé-Grau
- Neurology Research Group, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Precilla de Souza
- Office of the Clinical Director, National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - David R Adams
- Office of the Clinical Director, National Human Genome Research Institute, NIH, Bethesda, MD, USA.,Undiagnosed Diseases Program, The Common Fund, NIH, Bethesda, MD, USA
| | - Carlos Casasnovas
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.,Neuromuscular Unit, Neurology Department, Hospital Universitari de Bellvitge, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Heidi L Rehm
- Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Heather C Mefford
- Division of Genetic Medicine, Department of Paediatrics, University of Washington, Seattle, WA 98195, USA
| | - Luis González Gutierrez-Solana
- Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.,Pediatric Neurology, Hospital Infantil Universitario Niño Jesús, Madrid, Spain
| | - Alfredo Brusco
- Department of Medical Sciences, University of Torino, 10126 Torino, Italy.,Medical Genetics Unit, Città della Salute e della Scienza, University Hospital, 10126 Turin, Italy
| | - Michel Koenig
- Laboratoire de Génétique de Maladies Rares EA7402, Institut Universitaire de Recherche Clinique, Université de Montpellier, CHU Montpellier, CEDEX 5, 34295 Montpellier, France
| | - Alfons Macaya
- Neurology Research Group, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.,Department of Paediatric Neurology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Aurora Pujol
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Catalonia, Spain.,Centre for Biomedical Research in Network on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Catalonia, Spain
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48
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Defective myelination in an RNA polymerase III mutant leukodystrophic mouse. Proc Natl Acad Sci U S A 2021; 118:2024378118. [PMID: 34583988 DOI: 10.1073/pnas.2024378118] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2021] [Indexed: 01/06/2023] Open
Abstract
RNA polymerase (Pol) III synthesizes abundant short noncoding RNAs that have essential functions in protein synthesis, secretion, and other processes. Despite the ubiquitous functions of these RNAs, mutations in Pol III subunits cause Pol III-related leukodystrophy, an early-onset neurodegenerative disease. The basis of this neural sensitivity and the mechanisms of disease pathogenesis are unknown. Here we show that mice expressing pathogenic mutations in the largest Pol III subunit, Polr3a, specifically in Olig2-expressing cells, have impaired growth and developmental delay, deficits in cognitive, sensory, and fine sensorimotor function, and hypomyelination in multiple regions of the cerebrum and spinal cord. These phenotypes reflect a subset of clinical features seen in patients. In contrast, the gross motor defects and cerebellar hypomyelination that are common features of severely affected patients are absent in the mice, suggesting a relatively mild form of the disease in this conditional model. Our results show that disease pathogenesis in the mice involves defects that reduce both the number of mature myelinating oligodendrocytes and the ability of these cells to produce a myelin sheath of normal thickness. The findings suggest unique sensitivities of oligodendrogenesis and myelination to perturbations of Pol III transcription.
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Ayrignac X, Carra-Dallière C, Codjia P, Mouzat K, Castelnovo G, Ellie E, Etcharry-Bouyx F, Belliard S, Marelli C, Portet F, Le Ber I, Durand-Dubief F, Mathey G, Stankoff B, Dorboz I, Drunat S, Boespflug-Tanguy O, Menjot de Champfleur N, Lumbroso S, Mochel F, Labauge P. Evaluation of CSF1R-related adult onset leukoencephalopathy with axonal spheroids and pigmented glia diagnostic criteria. Eur J Neurol 2021; 29:329-334. [PMID: 34541732 DOI: 10.1111/ene.15115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND PURPOSE Diagnostic criteria for adult onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) due to colony-stimulating factor 1 receptor (CSF1R) mutation have recently been proposed. Our objective was to assess their accuracy in an independent multicenter cohort. METHODS We evaluated the sensitivity and specificity of the diagnostic criteria for ALSP (including the "probable" and "possible" definitions) in a national cohort of 22 patients with CSF1R mutation, and 59 patients with an alternative diagnosis of adult onset inherited leukoencephalopathy. RESULTS Overall, the sensitivity of the diagnostic criteria for ALSP was 82%, including nine of 22 patients diagnosed as probable and nine of 22 diagnosed as possible. Twenty of the 59 CSF1R mutation-negative leukoencephalopathies fulfilled the diagnostic criteria, leading to a specificity of 66%. CONCLUSIONS Diagnostic criteria for ALSP have an overall limited sensitivity along with a modest specificity. We suggest that in patients suspected of genetic leukoencephalopathy, a comprehensive magnetic resonance imaging pattern-based approach is warranted, together with white matter gene panel or whole exome sequencing.
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Affiliation(s)
- Xavier Ayrignac
- Department of Neurology, INM, INSERM, University of Montpellier, Montpellier University Hospital, Montpellier, France
| | | | - Pekes Codjia
- Department of Neurology A, Neurological Hospital, Civil Hospices of Lyon, Bron, France
| | - Kevin Mouzat
- Laboratory of Biochemistry and Molecular Biology, CHU Nimes, University of Montpellier, Nimes, France
| | | | - Emmanuel Ellie
- Department of Neurology, Bayonne Hospital, Bayonne, France
| | | | - Serge Belliard
- Department of Neurology, Pontchaillou University Hospital, CMRR, Rennes, France.,Laboratory of Neuropsychology, INSERM U 1077, Caen, France
| | - Cecilia Marelli
- EPHE, INSERM, MMDN, University of Montpellier, Montpellier, France.,Expert Center for Neurogenetic Diseases, CHU, Montpellier, France
| | - Florence Portet
- University Department of Adult Psychiatry, La Colombière Hospital, Montpellier University Hospital, Montpellier, France
| | - Isabelle Le Ber
- AP-HP, Reference Center for Rare or Early Onset Dementias, Department of Neurology, DMU Neurosciences, Pitié-Salpêtrière University Hospital, Paris, France.,Sorbonne Université, ICM (Paris Brain Institute), APHP, INSERM, CNRS, Pitié-Salpêtrière University Hospital, Paris, France
| | | | - Guillaume Mathey
- Department of Neurology, Nancy University Hospital, Nancy, France
| | - Bruno Stankoff
- Department of Neurology, St. Antoine Hospital, APHP, ICM, Paris, France
| | - Imen Dorboz
- INSERM UMR1141, Sorbonne Paris Cité, DHU PROTECT, Robert Debré Hospital, Paris Diderot University, Paris, France
| | - Severine Drunat
- Department of Genetics, APHP Robert Debré, Paris, France.,INSERM UMR, 1141, NeuroDiderot, University of Paris, Paris, France
| | - Odile Boespflug-Tanguy
- INSERM UMR1141, Sorbonne Paris Cité, DHU PROTECT, Robert Debré Hospital, Paris Diderot University, Paris, France
| | | | - Serge Lumbroso
- Laboratory of Biochemistry and Molecular Biology, CHU Nimes, University of Montpellier, Nimes, France
| | - Fanny Mochel
- Sorbonne University, ICM (Paris Brain Institute), AP-HP, INSERM, CNRS, Pitié-Salpêtrière University Hospital, Paris, France.,APHP, Department of Genetics, Pitié-Salpêtrière University Hospital, Paris, France
| | - Pierre Labauge
- Department of Neurology, INM, INSERM, University of Montpellier, Montpellier University Hospital, Montpellier, France
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50
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Case report: 'AARS2 leukodystrophy'. Mol Genet Metab Rep 2021; 28:100782. [PMID: 34285876 PMCID: PMC8280508 DOI: 10.1016/j.ymgmr.2021.100782] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/06/2021] [Accepted: 07/06/2021] [Indexed: 12/17/2022] Open
Abstract
Background Mitochondrial alanyl-tRNA synthetase 2 gene (AARS2) related disease is a rare genetic disorder affecting mitochondrial metabolism, leading to severe cardiac disease in infants or progressive leukodystrophy in young adults. The disease is considered ultra-rare with only 39 cases of AARS2-leukodystrophy previously reported. Case presentation We present the case of a young man of consanguineous heritage suffering from cognitive decline and progressive spasticity as well as weakness of the proximal musculature. Utilizing MRI and whole genome sequencing, the patient was diagnosed with a homozygous AARS2 missense variant (NM_020745.3:c.650C > T; p.(Pro217Leu)) and a homozygous CAPN3 variant (NM_000070.2: c.1469G > A; p.(Arg490Gln)), both variants have previously been identified in patients suffering from AARS2 related leukodystrophy and limb-girdle muscular dystrophy, respectively. Conclusions This case report presents a case of homozygous AARS2 leukodystrophy and serves to highlight the importance of whole genome sequencing in diagnosing rare neurological diseases as well as to add to the awareness of adult onset leukodystrophies.
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Key Words
- AARS2
- AARS2, Mitochondrial alanyl-tRNA synthetase 2 gene
- AARS2-L, Mitochondrial alanyl-tRNA synthetase 2 gene leukodystrophy
- ADLs, activities of daily living
- ALSP, Adult-Onset Leukoencephalopathy With Axonal Spheroids and Pigmented Glia
- Adult onset leukodystrophies
- CSF, Cerebrospinal fluid
- CSF1R, Colony stimulating factor-1 receptor
- Case report
- DARS2, Deficiency of aspartyl-tRNA
- EARS2, Deficiency of glutamate-tRNA synthetase
- HDLS, Hereditary Diffuse Leukodystrophy with axonal Spheroids
- IEM, Inborn errors of metabolism
- Inborn errors of metabolism
- LGMD R1, Limb-girdle muscular dystrophy R1 calpain3-related
- Limb-girdle muscular dystrophy
- MMSE, Mini-Mental State Examination
- Mt-aaRS, Mitochondrial aminoacyl-tRNA synthetase
- Whole genome sequencing
- mtDNA, Mitochondrial DNA
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