1
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Bi X, Mulhern MS, Spiegel E, Wapner RJ, Levy B, Bain JM, Liao J. 3' UTR Deletion of FBXO28 in a Patient with Brain Abnormalities and Developmental Delay. Genes (Basel) 2023; 14:1687. [PMID: 37761828 PMCID: PMC10530825 DOI: 10.3390/genes14091687] [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: 08/04/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023] Open
Abstract
Constitutional deletions of chromosome 1q42 region are rare. The phenotype spectrum associated with this copy number change is variable, including developmental delay, intellectual disability, seizures, and dysmorphology. This study describes a patient with developmental delays and brain abnormalities. G-banded karyotype, FISH, SNP oligonucleotide microarray analysis (SOMA), and whole exome sequencing analysis were performed. Postnatal reanalysis of prenatal SOMA and follow-up parental testing revealed a paternally inherited 63 kb deletion at 1q42.11 in the patient. We characterized the clinical features of this patient, providing insight into the clinical phenotype associated with deletions of the 1q42.11 sub-band. Our study provides new evidence supporting the potential functional importance of the FBXO28 3' UTR region and the hypothesis that FBXO28 is a critical gene in the pathogenesis of chromosome 1q41q42 microdeletion syndrome. It also highlights the different goals and reporting criteria between prenatal and postnatal microarray tests.
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Affiliation(s)
- Xin Bi
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Maureen S. Mulhern
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Erica Spiegel
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Ronald J. Wapner
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Brynn Levy
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jennifer M. Bain
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jun Liao
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
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2
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Two Novel Variants of WDR26 in Chinese Patients with Intellectual Disability. Genes (Basel) 2022; 13:genes13050813. [PMID: 35627197 PMCID: PMC9140611 DOI: 10.3390/genes13050813] [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] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 04/23/2022] [Accepted: 04/29/2022] [Indexed: 12/25/2022] Open
Abstract
Skraban-Deardorff syndrome is a rare autosomal dominant genetic disease caused by variants in the WDR26 gene. Here, we report two Chinese patients diagnosed with Skraban-Deardorff syndrome caused by novel de novo, heterozygous pathogenic WDR26 variants c.977delA (p. 12 N326Ifs*2) and c.1020-2A>G (p. R340Sfs*29). Their clinical features were characterized by intellectual disability (ID), developmental delay, abnormal facial features and the absence of early-onset seizure, which expands the phenotype spectrum associated with Skraban-Deardorff syndrome. By comparing our cases with current reported cases of WDR26-related intellectual disability, we suggest that developmental delay, particularly in speech, and facial features including rounded palpebral fissures, depressed nasal root, full nasal tip and abnormal gums, represent the prominent clinical phenotypes for diagnosis of Skraban-Deardorff syndrome. Together, WDR26 variants and 1q41q42 deletions should feature prominently on the differential diagnosis of ID with distinctive facial features.
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3
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Stephenson SE, Costain G, Blok LE, Silk MA, Nguyen TB, Dong X, Alhuzaimi DE, Dowling JJ, Walker S, Amburgey K, Hayeems RZ, Rodan LH, Schwartz MA, Picker J, Lynch SA, Gupta A, Rasmussen KJ, Schimmenti LA, Klee EW, Niu Z, Agre KE, Chilton I, Chung WK, Revah-Politi A, Au PB, Griffith C, Racobaldo M, Raas-Rothschild A, Ben Zeev B, Barel O, Moutton S, Morice-Picard F, Carmignac V, Cornaton J, Marle N, Devinsky O, Stimach C, Wechsler SB, Hainline BE, Sapp K, Willems M, Bruel AL, Dias KR, Evans CA, Roscioli T, Sachdev R, Temple SE, Zhu Y, Baker JJ, Scheffer IE, Gardiner FJ, Schneider AL, Muir AM, Mefford HC, Crunk A, Heise EM, Millan F, Monaghan KG, Person R, Rhodes L, Richards S, Wentzensen IM, Cogné B, Isidor B, Nizon M, Vincent M, Besnard T, Piton A, Marcelis C, Kato K, Koyama N, Ogi T, Goh ESY, Richmond C, Amor DJ, Boyce JO, Morgan AT, Hildebrand MS, Kaspi A, Bahlo M, Friðriksdóttir R, Katrínardóttir H, Sulem P, Stefánsson K, Björnsson HT, Mandelstam S, Morleo M, Mariani M, Scala M, Accogli A, Torella A, Capra V, Wallis M, Jansen S, Waisfisz Q, de Haan H, Sadedin S, Lim SC, White SM, Ascher DB, Schenck A, Lockhart PJ, Christodoulou J, Tan TY, Christodoulou J, Tan TY. Germline variants in tumor suppressor FBXW7 lead to impaired ubiquitination and a neurodevelopmental syndrome. Am J Hum Genet 2022; 109:601-617. [PMID: 35395208 DOI: 10.1016/j.ajhg.2022.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/28/2022] [Indexed: 11/01/2022] Open
Abstract
Neurodevelopmental disorders are highly heterogenous conditions resulting from abnormalities of brain architecture and/or function. FBXW7 (F-box and WD-repeat-domain-containing 7), a recognized developmental regulator and tumor suppressor, has been shown to regulate cell-cycle progression and cell growth and survival by targeting substrates including CYCLIN E1/2 and NOTCH for degradation via the ubiquitin proteasome system. We used a genotype-first approach and global data-sharing platforms to identify 35 individuals harboring de novo and inherited FBXW7 germline monoallelic chromosomal deletions and nonsense, frameshift, splice-site, and missense variants associated with a neurodevelopmental syndrome. The FBXW7 neurodevelopmental syndrome is distinguished by global developmental delay, borderline to severe intellectual disability, hypotonia, and gastrointestinal issues. Brain imaging detailed variable underlying structural abnormalities affecting the cerebellum, corpus collosum, and white matter. A crystal-structure model of FBXW7 predicted that missense variants were clustered at the substrate-binding surface of the WD40 domain and that these might reduce FBXW7 substrate binding affinity. Expression of recombinant FBXW7 missense variants in cultured cells demonstrated impaired CYCLIN E1 and CYCLIN E2 turnover. Pan-neuronal knockdown of the Drosophila ortholog, archipelago, impaired learning and neuronal function. Collectively, the data presented herein provide compelling evidence of an F-Box protein-related, phenotypically variable neurodevelopmental disorder associated with monoallelic variants in FBXW7.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - John Christodoulou
- Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC 3052, Australia; Victorian Clinical Genetics Services, Melbourne, VIC 3052, Australia
| | - Tiong Yang Tan
- Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC 3052, Australia; Victorian Clinical Genetics Services, Melbourne, VIC 3052, Australia.
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4
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Chen CP, Chern SR, Wu PS, Chen SW, Wu FT, Wang W. Molecular cytogenetic characterization of a de novo chromosome 1q41-q42.11 microdeletion of paternal origin in a 15-year-old boy with mental retardation, developmental delay, autism and congenital heart defects. Taiwan J Obstet Gynecol 2021; 60:341-344. [PMID: 33678339 DOI: 10.1016/j.tjog.2021.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE We present molecular cytogenetic characterization of a de novo chromosome 1q41-q42.11 microdeletion of paternal origin in a mentally retarded child of a family requesting for genetic counseling of the future pregnancy. CASE REPORT A 43-year-old, gravida 1, para 1, woman, who had a 15-year-old son with mental retardation, planned to have another normal child and requested for genetic counseling of the future pregnancy. Her husband was 48 years old. The 15-year-old boy had a body height of 148 cm (<3rd centile) and a body weight of 40 Kg (<35th centile). He had facial dysmorphism, mental retardation, scoliosis, abnormal gaits, tetralogy of Fallot, pulmonary stenosis and autism but did not have any history of epilepsy. Cytogenetic analysis of the boy and the parents revealed normal karyotypes. Array comparative genomic hybridization (aCGH) analysis of the family revealed a de novo 2.028-Mb 1q41-q42.11 microdeletion, or arr 1q41q42.11 (222,571,596-224,599,234) × 1.0 [GRCh37 (hg19)], encompassing 13 Online Mendelian Inheritance in Man (OMIM) genes including DISP1, SUSD4, FBXO28, TP53BP2 and WDR26 in the child. Quantitative fluorescent polymerase chain reaction analysis confirmed a paternal origin of the deletion. Fluorescence in situ hybridization analysis confirmed a 1q41 deletion. CONCLUSION Genetic counseling of the parents who have a previous child with mental retardation and who wish to have another normal child in the future pregnancy should include genetic studies, and aCGH is useful under such a circumstance.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung, Taiwan.
| | - Schu-Rern Chern
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | | | - Shin-Wen Chen
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Fang-Tzu Wu
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Wayseen Wang
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
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5
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Schneider AL, Myers CT, Muir AM, Calvert S, Basinger A, Perry MS, Rodan L, Helbig KL, Chambers C, Gorman KM, King MD, Donkervoort S, Soldatos A, Bönnemann CG, Spataro N, Gabau E, Arellano M, Cappuccio G, Brunetti-Pierri N, Rossignol E, Hamdan FF, Michaud JL, Balak C, Mefford HC, Scheffer IE. FBXO28 causes developmental and epileptic encephalopathy with profound intellectual disability. Epilepsia 2020; 62:e13-e21. [PMID: 33280099 DOI: 10.1111/epi.16784] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/30/2020] [Accepted: 11/17/2020] [Indexed: 11/28/2022]
Abstract
Chromosome 1q41-q42 deletion syndrome is a rare cause of intellectual disability, seizures, dysmorphology, and multiple anomalies. Two genes in the 1q41-q42 microdeletion, WDR26 and FBXO28, have been implicated in monogenic disease. Patients with WDR26 encephalopathy overlap clinically with those with 1q41-q42 deletion syndrome, whereas only one patient with FBXO28 encephalopathy has been described. Seizures are a prominent feature of 1q41-q42 deletion syndrome; therefore, we hypothesized that pathogenic FBXO28 variants cause developmental and epileptic encephalopathies (DEEs). We describe nine new patients with FBXO28 pathogenic variants (four missense, including one recurrent, three nonsense, and one frameshift) and analyze all 10 known cases to delineate the phenotypic spectrum. All patients had epilepsy and 9 of 10 had DEE, including infantile spasms (3) and a progressive myoclonic epilepsy (1). Median age at seizure onset was 22.5 months (range 8 months to 5 years). Nine of 10 patients had intellectual disability, which was profound in six of nine and severe in three of nine. Movement disorders occurred in eight of 10 patients, six of 10 had hypotonia, four of 10 had acquired microcephaly, and five of 10 had dysmorphic features, albeit different to those typically seen in 1q41-q42 deletion syndrome and WDR26 encephalopathy. We distinguish FBXO28 encephalopathy from both of these disorders with more severe intellectual impairment, drug-resistant epilepsy, and hyperkinetic movement disorders.
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Affiliation(s)
- Amy L Schneider
- Epilepsy Research Centre, Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia
| | - Candace T Myers
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle, WA, USA
| | - Alison M Muir
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle, WA, USA
| | - Sophie Calvert
- Department of Neurology, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | | | - M Scott Perry
- Justin Neurosciences Center, Cook Children's Medical Center, Fort Worth, TX, USA
| | - Lance Rodan
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.,Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Katherine L Helbig
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Chelsea Chambers
- Department of Neurosciences, University of Virginia, Charlottesville, VA, USA
| | - Kathleen M Gorman
- Department of Neurology and Clinical Neurophysiology, Children's Health Ireland at Temple Street, Dublin, Ireland.,School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
| | - Mary D King
- Department of Neurology and Clinical Neurophysiology, Children's Health Ireland at Temple Street, Dublin, Ireland.,School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland
| | - Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Ariane Soldatos
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Nino Spataro
- Genetics Laboratory, UDIAT-Centre Diagnostic, Parc Taulí University Hospital, Parc Taulí I3PT Research and Innovation Institute, University of Barcelona, Sabadell, Spain
| | - Elisabeth Gabau
- Paediatric Unit, Parc Taulí University Hospital, Parc Taulí I3PT Research and Innovation Institute, University of Barcelona, Sabadell, Spain
| | - Montserrat Arellano
- Neuropediatrics Unit, Pediatric Service, MutuaTerrassa University Hospital, Terrassa, Spain
| | - Gerarda Cappuccio
- Department of Translational Medicine, Federico II University, Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Naples, Italy
| | - Nicola Brunetti-Pierri
- Department of Translational Medicine, Federico II University, Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Naples, Italy
| | - Elsa Rossignol
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montreal, Quebec, Canada.,Department of Neurosciences and Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Fadi F Hamdan
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montreal, Quebec, Canada.,Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Jacques L Michaud
- Centre Hospitalier Universitaire Sainte-Justine Research Center, Montreal, Quebec, Canada.,Department of Neurosciences and Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada
| | - Christopher Balak
- Neurogenomics Division, Centre for Rare Childhood Disorders (C4RCD), Translational Genomics Research Institute, Phoenix, AZ, USA.,Department of Cellular and Molecular Medicine, School of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Heather C Mefford
- Department of Pediatrics, Division of Genetic Medicine, University of Washington, Seattle, WA, USA
| | - Ingrid E Scheffer
- Epilepsy Research Centre, Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia.,Department of Paediatrics, Royal Children's Hospital, University of Melbourne, Parkville, Victoria, Australia.,Florey Institute of Neuroscience and Mental Health, Heidelberg, Victoria, Australia.,Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia
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6
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Zhu H, Meissner LE, Byrnes C, Tuymetova G, Tifft CJ, Proia RL. The Complement Regulator Susd4 Influences Nervous-System Function and Neuronal Morphology in Mice. iScience 2020; 23:100957. [PMID: 32179479 PMCID: PMC7075988 DOI: 10.1016/j.isci.2020.100957] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 10/31/2019] [Accepted: 02/25/2020] [Indexed: 01/02/2023] Open
Abstract
The SUSD4 (Sushi domain-containing protein 4) gene encodes a complement inhibitor that is frequently deleted in 1q41q42 microdeletion syndrome, a multisystem congenital disorder that includes neurodevelopmental abnormalities. To understand SUSD4's role in the mammalian nervous system, we analyzed Susd4 knockout (KO) mice. Susd4 KO mice exhibited significant defects in motor performance and significantly higher levels of anxiety-like behaviors. Susd4 KO brain had abnormal “hairy” basket cells surrounding Purkinje neurons within the cerebellum and significantly reduced dendritic spine density in hippocampal pyramidal neurons. Neurons and oligodendrocyte lineage cells of wild-type mice were found to express Susd4 mRNA. Protein expression of the complement component C1q was increased in the brains of Susd4 KO mice. Our data indicate that SUSD4 plays an important role in neuronal functions, possibly via the complement pathway, and that SUSD4 deletion may contribute to the nervous system abnormalities in patients with 1q41q42 deletions. Susd4 is expressed in neurons and oligodendrocyte lineage cells Susd4 knockout mice have abnormal hippocampal and cerebellar neuronal morphologies Susd4 knockout mice exhibit anxiety-like behaviors and impaired motor function Susd4 knockout mice have elevated brain levels of the complement component C1q
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Affiliation(s)
- Hongling Zhu
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA
| | - Laura E Meissner
- Office of the Clinical Director and Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Colleen Byrnes
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA
| | - Galina Tuymetova
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA
| | - Cynthia J Tifft
- Office of the Clinical Director and Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Richard L Proia
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA.
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7
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SCF FBXO28-mediated self-ubiquitination of FBXO28 promotes its degradation. Cell Signal 2019; 65:109440. [PMID: 31678254 DOI: 10.1016/j.cellsig.2019.109440] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/07/2019] [Accepted: 10/07/2019] [Indexed: 01/12/2023]
Abstract
The F-box protein is the substrate recognition subunit of SCF (SKP1/CUL1/F-box) E3 ubiquitin ligase complex, a multicomponent RING-type E3 ligase involved in the regulation of numerous cellular processes by targeting critical regulatory proteins for ubiquitination. However, whether and how F-box proteins are regulated is largely unknown. Here we report that FBXO28, a poorly characterized F-box protein, is a novel substrate of SCF E3 ligase. Pharmaceutical or genetic inhibition of neddylation pathway that is required for the activation of SCF stabilizes FBXO28 and prolongs its half-life. Meanwhile, FBXO28 is subjected to ubiquitination and cullin1-based SCF complex promotes FBXO28 degradation. Moreover, deletion of F-box domain stabilizes FBXO28 and knockdown of endogenous FBXO28 strongly upregulates exogenous FBXO28 expression. Taken together, these data reveal that SCFFBXO28 is the E3 ligase responsible for the self-ubiquitination and proteasomal degradation of FBXO28, providing a new clue for the upstream signaling regulation for F-box proteins.
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8
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HU J, QIAN Y, SUN Y, YU J, LUO Y, DONG M. [Application of single nucleotide polymorphism microarray in clinical diagnosis of intellectual disability or retardation]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:420-428. [PMID: 31901047 PMCID: PMC8800802 DOI: 10.3785/j.issn.1008-9292.2019.08.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/28/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To assess the clinical application of single nucleotide polymorphism microarray (SNP array) in patients with intellectual disability/developmental delay(ID/DD). METHODS SNP array was performed to detect genome-wide DNA copy number variants (CNVs) for 145 patients with ID/DD in Women's Hospital, Zhejiang University School of Medicine from January 2013 to June 2018. The CNVs were analyzed by CHAS software and related databases. RESULTS Among 145 patients, pathogenic chromosomal abnormalities were detected in 32 cases, including 26 cases of pathogenic CNVs and 6 cases of likely pathogenic CNVs. Meanwhile, 18 cases of uncertain clinical significance and 14 cases of likely benign were identified, no significant abnormalities were found in 81 cases (including benign). CONCLUSIONS SNP array is effective for detecting chromosomal abnormalities in patients with ID/DD with high efficiency and resolution.
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Affiliation(s)
| | | | | | | | | | - Minyue DONG
- 董旻岳(1964—), 男, 博士, 主任医师, 博士生导师, 主要从事生殖遗传学研究; E-mail:
;
https://orcid.org/0000-0002-4344-7924
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9
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Yanagishita T, Yamamoto-Shimojima K, Nakano S, Sasaki T, Shigematsu H, Imai K, Yamamoto T. Phenotypic features of 1q41q42 microdeletion including WDR26 and FBXO28 are clinically recognizable: The first case from Japan. Brain Dev 2019; 41:452-455. [PMID: 30635136 DOI: 10.1016/j.braindev.2018.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/23/2018] [Accepted: 12/26/2018] [Indexed: 01/11/2023]
Abstract
1q41q42 microdeletion syndrome has been established in 2007. Since then, more than 17 patients have been reported so far. The reported deletions showed random breakpoints and deletion regions are aligned as roof tiles. Patients with 1q41q42 microdeletion syndrome show intellectual disability, seizures, and distinctive features. Many genotype-phenotype correlation studies have been performed and some genes included in this region have been suggested as potential candidate genes. Recently, de novo variants in WDR26 and FBXO28 were identified in patients who showed consistent phenotypes with 1q41q42 microdeletion syndrome. Thus, both genes are now considered as the genes possibly responsible for 1q41q42 microdeletion syndrome. Here, the first case of a Japanese patient with a de novo 1q41q42 microdeletion is reported. Owing to the distinctive features, this syndrome would be clinically recognizable.
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Affiliation(s)
- Tomoe Yanagishita
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan; Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Keiko Yamamoto-Shimojima
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan; Tokyo Women's Medical University Institute of Integrated Medical Sciences, Tokyo, Japan
| | - Sayaka Nakano
- Department of Pediatrics, National Hospital Organization Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - Testuya Sasaki
- Department of Pediatrics, Iwate Prefectural Chubu Hospital, Kitakami, Japan
| | - Hideo Shigematsu
- Department of Pediatrics, National Hospital Organization Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - Katsumi Imai
- Department of Pediatrics, National Hospital Organization Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - Toshiyuki Yamamoto
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan; Tokyo Women's Medical University Institute of Integrated Medical Sciences, Tokyo, Japan.
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10
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Balak C, Belnap N, Ramsey K, Joss S, Devriendt K, Naymik M, Jepsen W, Siniard AL, Szelinger S, Parker ME, Richholt R, Izatt T, LaFleur M, Terraf P, Llaci L, De Both M, Piras IS, Rangasamy S, Schrauwen I, Craig DW, Huentelman M, Narayanan V. A novel
FBXO28
frameshift mutation in a child with developmental delay, dysmorphic features, and intractable epilepsy: A second gene that may contribute to the 1q41‐q42 deletion phenotype. Am J Med Genet A 2018; 176:1549-1558. [DOI: 10.1002/ajmg.a.38712] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 03/26/2018] [Accepted: 03/27/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Chris Balak
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Newell Belnap
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Keri Ramsey
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Shelagh Joss
- West of Scotland Genetics ServiceQueen Elizabeth University HospitalGlasgow United Kingdom
| | - Koen Devriendt
- Center for Human Genetics (Centrum Menselijke Erfelijkheid)University of LeuvenLeuven Belgium
| | - Marcus Naymik
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Wayne Jepsen
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Ashley L. Siniard
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Szabolcs Szelinger
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
- UCLA Pathology & Laboratory MedicineUCLA Center for the Health SciencesLos Angeles California
| | - Mary E. Parker
- Department of Physical TherapyTexas State UniversitySan Marcos Texas
- U.R. Our Hope, Undiagnosed and Rare Disorder OrganizationAustin Texas
| | - Ryan Richholt
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Tyler Izatt
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Madison LaFleur
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Panieh Terraf
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Lorida Llaci
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Matt De Both
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Ignazio S. Piras
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Sampathkumar Rangasamy
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Isabelle Schrauwen
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
- Department of Molecular and Human Genetics, Center for Statistical GeneticsBaylor College of MedicineHouston Texas
| | - David W. Craig
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
- Department of Translational GenomicsKeck School of Medicine of USCLos Angeles California
| | - Matt Huentelman
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
| | - Vinodh Narayanan
- Neurogenomics Division, Center for Rare Childhood Disorders (C4RCD)Translational Genomics Research InstitutePhoenix Arizona
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11
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WDR26 Haploinsufficiency Causes a Recognizable Syndrome of Intellectual Disability, Seizures, Abnormal Gait, and Distinctive Facial Features. Am J Hum Genet 2017; 101:139-148. [PMID: 28686853 DOI: 10.1016/j.ajhg.2017.06.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 05/30/2017] [Indexed: 11/21/2022] Open
Abstract
We report 15 individuals with de novo pathogenic variants in WDR26. Eleven of the individuals carry loss-of-function mutations, and four harbor missense substitutions. These 15 individuals comprise ten females and five males, and all have intellectual disability with delayed speech, a history of febrile and/or non-febrile seizures, and a wide-based, spastic, and/or stiff-legged gait. These subjects share a set of common facial features that include a prominent maxilla and upper lip that readily reveal the upper gingiva, widely spaced teeth, and a broad nasal tip. Together, these features comprise a recognizable facial phenotype. We compared these features with those of chromosome 1q41q42 microdeletion syndrome, which typically contains WDR26, and noted that clinical features are consistent between the two subsets, suggesting that haploinsufficiency of WDR26 contributes to the pathology of 1q41q42 microdeletion syndrome. Consistent with this, WDR26 loss-of-function single-nucleotide mutations identified in these subjects lead to nonsense-mediated decay with subsequent reduction of RNA expression and protein levels. We derived a structural model of WDR26 and note that missense variants identified in these individuals localize to highly conserved residues of this WD-40-repeat-containing protein. Given that WDR26 mutations have been identified in ∼1 in 2,000 of subjects in our clinical cohorts and that WDR26 might be poorly annotated in exome variant-interpretation pipelines, we would anticipate that this disorder could be more common than currently appreciated.
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12
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He J, Xie Y, Kong S, Qiu W, Wang X, Wang D, Sun X, Sun D. Psychomotor retardation with a 1q42.11-q42.12 deletion. Hereditas 2017; 154:6. [PMID: 28286461 PMCID: PMC5340030 DOI: 10.1186/s41065-016-0022-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 12/12/2016] [Indexed: 01/06/2023] Open
Abstract
A 1q42 deletion is a rare structure variation that commonly harbours various deletion breakpoints along with diversified phenotypes. In our study, we found a de novo 1q42 deletion in a boy who did not have a cleft palate or a congenital diaphragmatic hernia but presented with psychomotor retardation. A 1.9 Mb deletion located within 1q42.11-q42.12 was validated at the molecular cytogenetic level. This is the first report of a 1q42.11-q42.12 deletion in a patient with onlypsychomotor retardation. The precise break points could facilitate the discovery of potential causative genes, such as LBR, EPHX1, etc. The correlation between the psychomotor retardation and the underlying genetic factors could not only shed light on the diagnosis of psychomotor retardation at the genetic level but also provide potential therapeutic targets.
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Affiliation(s)
- Jialing He
- Experimental Animal Center, Research Institute for National Health and Family Planning Commission, Tai hui temple road, NO. 12, Haidian District, Beijing, 100081 People's Republic of China
| | - Yingjun Xie
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Shu Kong
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Wenjun Qiu
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Xiaoman Wang
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Ding Wang
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510080 China
| | - Deming Sun
- Experimental Animal Center, Research Institute for National Health and Family Planning Commission, Tai hui temple road, NO. 12, Haidian District, Beijing, 100081 People's Republic of China
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13
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Zak J, Vives V, Szumska D, Vernet A, Schneider JE, Miller P, Slee EA, Joss S, Lacassie Y, Chen E, Escobar LF, Tucker M, Aylsworth AS, Dubbs HA, Collins AT, Andrieux J, Dieux-Coeslier A, Haberlandt E, Kotzot D, Scott DA, Parker MJ, Zakaria Z, Choy YS, Wieczorek D, Innes AM, Jun KR, Zinner S, Prin F, Lygate CA, Pretorius P, Rosenfeld JA, Mohun TJ, Lu X. ASPP2 deficiency causes features of 1q41q42 microdeletion syndrome. Cell Death Differ 2016; 23:1973-1984. [PMID: 27447114 PMCID: PMC5136487 DOI: 10.1038/cdd.2016.76] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 06/09/2016] [Accepted: 06/13/2016] [Indexed: 11/09/2022] Open
Abstract
Chromosomal abnormalities are implicated in a substantial number of human developmental syndromes, but for many such disorders little is known about the causative genes. The recently described 1q41q42 microdeletion syndrome is characterized by characteristic dysmorphic features, intellectual disability and brain morphological abnormalities, but the precise genetic basis for these abnormalities remains unknown. Here, our detailed analysis of the genetic abnormalities of 1q41q42 microdeletion cases identified TP53BP2, which encodes apoptosis-stimulating protein of p53 2 (ASPP2), as a candidate gene for brain abnormalities. Consistent with this, Trp53bp2-deficient mice show dilation of lateral ventricles resembling the phenotype of 1q41q42 microdeletion patients. Trp53bp2 deficiency causes 100% neonatal lethality in the C57BL/6 background associated with a high incidence of neural tube defects and a range of developmental abnormalities such as congenital heart defects, coloboma, microphthalmia, urogenital and craniofacial abnormalities. Interestingly, abnormalities show a high degree of overlap with 1q41q42 microdeletion-associated abnormalities. These findings identify TP53BP2 as a strong candidate causative gene for central nervous system (CNS) defects in 1q41q42 microdeletion syndrome, and open new avenues for investigation of the mechanisms underlying CNS abnormalities.
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Affiliation(s)
- J Zak
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - V Vives
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - D Szumska
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - A Vernet
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - J E Schneider
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - P Miller
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - E A Slee
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
| | - S Joss
- Queen Elizabeth University Hospital Glasgow, Glasgow G51 4TF, UK
| | - Y Lacassie
- Department of Pediatrics, Louisiana State University, New Orleans, LA 70118, USA
- Genetics Services, Children's Hospital New Orleans, New Orleans, LA 70118, USA
| | - E Chen
- Kaiser Permanente, San Francisco Medical Center, San Francisco, CA 94115, USA
| | - L F Escobar
- St Vincent Children's Hospital, Indianapolis, IN 46260, USA
| | - M Tucker
- St Vincent Children's Hospital, Indianapolis, IN 46260, USA
| | - A S Aylsworth
- Departments of Pediatrics and Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - H A Dubbs
- Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - A T Collins
- Seattle Children's Hospital, Seattle, WA 98105, USA
| | - J Andrieux
- Institute of Medical Genetics, Jeanne de Flandre Hospital, CHRU de Lille, Lille 59000, France
| | | | - E Haberlandt
- Clinical Department of Pediatrics, Innsbruck Medical University, Innsbruck A-6020, Austria
| | - D Kotzot
- Division of Human Genetics, Department of Medical Genetics, Molecular and Clinical Pharmacology, Innsbruck Medical University, Innsbruck A-6020, Austria
| | - D A Scott
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - M J Parker
- Sheffield Children's Hospital NHS Foundation Trust, Western Bank, Sheffield, S10 2TH, UK
| | - Z Zakaria
- Institute for Medical Research, Kuala Lumpur, Jalan Pahang 50588, Malaysia
| | - Y S Choy
- Prince Court Medical Centre, Kuala Lumpur 50450, Malaysia
| | - D Wieczorek
- Institute of Human Genetics, University Clinic Essen, Duisburg-Essen University, Essen 45122, Germany
- Institute of Human Genetics, University Clinic, Heinrich-Heine University, Düsseldorf 40225, Germany
| | - A M Innes
- Department of Medical Genetics and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada T3B 6A8
| | - K R Jun
- Department of Laboratory Medicine, Haeundae Paik Hospital, Inje University, Haeundae-gu, Busan, Korea
| | - S Zinner
- Seattle Children's Hospital, Seattle, WA 98105, USA
| | - F Prin
- The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK
| | - C A Lygate
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - P Pretorius
- Department of Neuroradiology, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford OX3 9DU, UK
| | - J A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - T J Mohun
- The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK
| | - X Lu
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, UK
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14
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Cassina M. Response to: Papetti et al., “The crucial role of FBXO28 in the pathogenesis of the 1q41q42 microdeletion syndrome”. Am J Med Genet A 2016; 170:3054. [DOI: 10.1002/ajmg.a.37742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 04/27/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Matteo Cassina
- Clinical Genetics Unit; Department of Women's and Children's Health; University of Padova; Padova Italy
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15
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Papetti L, Schettini L, Garone G, Gennaro E, Malacarne M, Properzi E, Spalice A. The crucial role ofFBXO28in the pathogenesis of the 1q41q42 microdeletion syndrome. Am J Med Genet A 2016; 170:3041-3042. [DOI: 10.1002/ajmg.a.37753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 04/27/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Laura Papetti
- Division of Child Neurology; Department of Pediatrics; Sapienza University of Rome; Rome Italy
| | - Livia Schettini
- Division of Child Neurology; Department of Pediatrics; Sapienza University of Rome; Rome Italy
| | - Giacomo Garone
- Division of Child Neurology; Department of Pediatrics; Sapienza University of Rome; Rome Italy
| | - Elena Gennaro
- Laboratory of Genetics; E.O. Ospedali Galliera; Genova Italy
| | | | - Enrico Properzi
- Division of Child Neurology; Department of Pediatrics; Sapienza University of Rome; Rome Italy
| | - Alberto Spalice
- Division of Child Neurology; Department of Pediatrics; Sapienza University of Rome; Rome Italy
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