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Risemberg EL, Smeekens JM, Cruz Cisneros MC, Hampton BK, Hock P, Linnertz CL, Miller DR, Orgel K, Shaw GD, Manuel de Villena FP, Burks AW, Valdar W, Kulis MD, Ferris MT. A mutation in Themis contributes to anaphylaxis severity following oral peanut challenge in CC027 mice. J Allergy Clin Immunol 2024:S0091-6749(24)00411-1. [PMID: 38670234 DOI: 10.1016/j.jaci.2024.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 03/12/2024] [Accepted: 03/22/2024] [Indexed: 04/28/2024]
Abstract
BACKGROUND The development of peanut allergy is due to a combination of genetic and environmental factors, although specific genes have proven difficult to identify. Previously, we reported that peanut-sensitized CC027/GeniUnc (CC027) mice develop anaphylaxis upon oral challenge to peanut, unlike C3H/HeJ (C3H) mice. OBJECTIVE To determine the genetic basis of orally-induced anaphylaxis to peanut in CC027 mice. METHODS A genetic mapping population between CC027 and C3H mice was designed to identify the genetic factors that drive oral anaphylaxis. A total of 356 CC027xC3H backcrossed mice were generated, sensitized to peanut, then challenged to peanut by oral gavage. Anaphylaxis and peanut-specific IgE were quantified for all mice. T-cell phenotyping was conducted on CC027 and five additional CC strains. RESULTS Anaphylaxis to peanut was absent in 77% of backcrossed mice, with 19% showing moderate anaphylaxis, and 4% having severe anaphylaxis. A total of eight genetic loci were associated with variation in response to peanut challenge, six associated with anaphylaxis (temperature decrease) and two associated with peanut-specific IgE levels. There were two major loci that impacted multiple aspects of the severity of acute anaphylaxis, at which the CC027 allele was associated with worse outcome. At one of these loci, CC027 has a private genetic variant in the Themis (thymocyte-expressed molecule involved in selection) gene. Consistent with Themis' described functions, we found that CC027 have more immature T cells with fewer CD8+, CD4+, and CD4+CD25+CD127- regulatory T cells. CONCLUSION Our results demonstrate a key role for Themis in the orally-reactive CC027 mouse model of peanut allergy.
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Affiliation(s)
- Ellen L Risemberg
- Curriculum in Bioinformatics and Computational Biology, UNC Chapel Hill; Department of Genetics, UNC Chapel Hill
| | - Johanna M Smeekens
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - Marta C Cruz Cisneros
- Department of Genetics, UNC Chapel Hill; Curriculum in Genetics and Molecular Biology, UNC Chapel Hill
| | - Brea K Hampton
- Department of Genetics, UNC Chapel Hill; Curriculum in Genetics and Molecular Biology, UNC Chapel Hill
| | | | | | | | - Kelly Orgel
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - Ginger D Shaw
- Department of Genetics, UNC Chapel Hill; Lineberger Comprehensive Cancer Center, UNC Chapel Hill
| | | | - A Wesley Burks
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - William Valdar
- Department of Genetics, UNC Chapel Hill; Lineberger Comprehensive Cancer Center, UNC Chapel Hill
| | - Michael D Kulis
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
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Naamneh Elzenaty R, Martinez de Lapiscina I, Kouri C, Sauter KS, Sommer G, Castaño L, Flück CE. Characterization of 35 novel NR5A1/SF-1 variants identified in individuals with atypical sexual development: The SF1next study. J Clin Endocrinol Metab 2024:dgae251. [PMID: 38623954 DOI: 10.1210/clinem/dgae251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/14/2024] [Accepted: 04/10/2024] [Indexed: 04/17/2024]
Abstract
CONTEXT Steroidogenic factor 1 (NR5A1/SF-1) is a nuclear receptor that regulates sex development, steroidogenesis and reproduction. Genetic variants in NR5A1/SF-1 are common among differences of sex development (DSD) and associate with a wide range of phenotypes, but their pathogenic mechanisms remain unclear. OBJECTIVE Novel, likely disease-causing NR5A1/SF-1 variants from the SF1next cohort of individuals with DSD were characterized to elucidate their pathogenic effect. METHODS Different in silico tools were used to predict the impact of novel NR5A1/SF-1 variants on protein function. An extensive literature review was conducted to compare and select the best functional studies for testing the pathogenic effect of the variants in a classic cell culture model. The missense NR5A1/SF-1 variants were tested on the promoter luciferase reporter vector -152CYP11A1_pGL3 in HEK293T cells and assessed for their cytoplasmic/nuclear localization by Western blot. RESULTS Thirty-five novel NR5A1/SF-1 variants were identified in the SF1next cohort. Seventeen missense NR5A1/SF-1 variants were functionally tested. Transactivation assays showed reduced activity for 40% of the variants located in the DNA binding domain and variable activity for variants located elsewhere. Translocation assessment revealed three variants (3/17) with affected nuclear translocation. No clear genotype-phenotype, structure-function correlation was found. CONCLUSIONS Genetic analyses and functional assays do not explain the observed wide phenotype of individuals with these novel NR5A1/SF-1 variants. In nine individuals, additional likely disease-causing variants in other genes were found, strengthening the hypothesis that the broad phenotype of DSD associated with NR5A1/SF-1 variants may be caused by an oligogenic mechanism.
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Affiliation(s)
- Rawda Naamneh Elzenaty
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Idoia Martinez de Lapiscina
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Research into the genetics and control of diabetes and other endocrine disorders, Biobizkaia Health Research Institute, Cruces University Hospital, Barakaldo, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III, Madrid, Spain
- CIBER de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Endo-ERN, Amsterdam, The Netherlands
| | - Chrysanthi Kouri
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Kay-Sara Sauter
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Grit Sommer
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
| | - Luis Castaño
- Research into the genetics and control of diabetes and other endocrine disorders, Biobizkaia Health Research Institute, Cruces University Hospital, Barakaldo, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III, Madrid, Spain
- CIBER de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Endo-ERN, Amsterdam, The Netherlands
- Department of Pediatric Endocrinology, Cruces University Hospital, Barakaldo Spain
- University of the Basque Country (UPV-EHU), Leioa, Spain
| | - Christa E Flück
- Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
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3
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Chen YJ, Wang WJ, Zou DF, Luo JX, Jin PY, Jin L, Liu XR, Liao WP, Li B, Chen YJ. CCDC88C variants are associated with focal epilepsy and genotype-phenotype correlation. Clin Genet 2024; 105:397-405. [PMID: 38173219 DOI: 10.1111/cge.14476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/17/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024]
Abstract
CCDC88C gene, which encodes coiled-coil domain containing 88C, is essential for cell communication during neural development. Variants in the CCDC88C caused congenital hydrocephalus, some accompanied by seizures. In patients with epilepsy without acquired etiologies, we performed whole-exome sequencing (trio-based). Two de novo and two biallelic CCDC88C variants were identified in four cases with focal (partial) epilepsy. These variants did not present or had low frequencies in the gnomAD populations and were predicted to be damaging by multiple computational algorithms. Patients with de novo variants presented with adult-onset epilepsy, whereas patients with biallelic variants displayed infant-onset epilepsy. They all responded well to anti-seizure medications and were seizure-free. Further analysis showed that de novo variants were located at crucial domains, whereas one paired biallelic variants were located outside the crucial domains, and the other paired variant had a non-classical splicing and a variant located at crucial domain, suggesting a sub-molecular effect. CCDC88C variants associated with congenital hydrocephalus were all truncated, whereas epilepsy-associated variants were mainly missense, the proportion of which was significantly higher than that of congenital hydrocephalus-associated variants. CCDC88C is potentially associated with focal epilepsy with favorable outcome. The underlying mechanisms of phenotypic variation may correlation between genotype and phenotype.
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Affiliation(s)
- Yu-Jie Chen
- Institute of Neuroscience of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, Guangdong, China
- Department of Neurology, the Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, China
| | - Wen-Jie Wang
- Department of Neurology, Lanzhou University Second Hospital, Lanzhou, China
| | - Dong-Fang Zou
- Epilepsy Center and Department of Neurology, Shenzhen Children's Hospital, Shantou University Medical College, Shenzhen, China
| | - Jun-Xia Luo
- Department of Epilepsy Center, Children's Hospital Affiliated to Shandong University (Jinan Children's Hospital), Jinan, Shandong, China
| | - Pei-Yan Jin
- Department of Critical Care Medicine, Jinan Central Hospital, Jinan, Shandong, China
| | - Liang Jin
- Institute of Neuroscience of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, Guangdong, China
- Department of Neurology, the Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, China
| | - Xiao-Rong Liu
- Institute of Neuroscience of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, Guangdong, China
| | - Wei-Ping Liao
- Institute of Neuroscience of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, Guangdong, China
| | - Bin Li
- Institute of Neuroscience of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, Guangdong, China
| | - Yong-Jun Chen
- Department of Neurology, the Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, China
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Riedhammer KM, Simmendinger H, Tasic V, Putnik J, Abazi-Emini N, Stajic N, Berutti R, Weidenbusch M, Patzer L, Lungu A, Milosevski-Lomic G, Günthner R, Braunisch MC, Ćomić J, Hoefele J. Is there a dominant-negative effect in individuals with heterozygous disease-causing variants in COL4A3/COL4A4? Clin Genet 2024; 105:406-414. [PMID: 38214412 DOI: 10.1111/cge.14471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 01/13/2024]
Abstract
Alport syndrome (AS) shows a broad phenotypic spectrum ranging from isolated microscopic hematuria (MH) to end-stage kidney disease (ESKD). Monoallelic disease-causing variants in COL4A3/COL4A4 have been associated with autosomal dominant AS (ADAS) and biallelic variants with autosomal recessive AS (ARAS). The aim of this study was to analyze clinical and genetic data regarding a possible genotype-phenotype correlation in individuals with disease-causing variants in COL4A3/COL4A4. Eighty-nine individuals carrying at least one COL4A3/COL4A4 variant classified as (likely) pathogenic according to the American College of Medical Genetics guidelines and current amendments were recruited. Clinical data concerning the prevalence and age of first reported manifestation of MH, proteinuria, ESKD, and extrarenal manifestations were collected. Individuals with monoallelic non-truncating variants reported a significantly higher prevalence and earlier diagnosis of MH and proteinuria than individuals with monoallelic truncating variants. Individuals with biallelic variants were more severely affected than those with monoallelic variants. Those with biallelic truncating variants were more severely affected than those with compound heterozygous non-truncating/truncating variants or individuals with biallelic non-truncating variants. In this study an association of heterozygous non-truncating COL4A3/COL4A4 variants with a more severe phenotype in comparison to truncating variants could be shown indicating a potential dominant-negative effect as an explanation for this observation. The results for individuals with ARAS support the, still scarce, data in the literature.
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Affiliation(s)
- Korbinian M Riedhammer
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
- Department of Nephrology, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Hannes Simmendinger
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Velibor Tasic
- Medical Faculty of Skopje, University Children's Hospital, Macedonia
| | - Jovana Putnik
- Institute for Mother and Child Health Care of Serbia "Dr Vukan Čupić", Department of Nephrology, University of Belgrade, Faculty of Medicine, Belgrade, Serbia
| | - Nora Abazi-Emini
- Medical Faculty of Skopje, University Children's Hospital, Macedonia
| | - Natasa Stajic
- Institute for Mother and Child Health Care of Serbia "Dr Vukan Čupić", Department of Nephrology, University of Belgrade, Faculty of Medicine, Belgrade, Serbia
| | - Riccardo Berutti
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Marc Weidenbusch
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Ludwig-Maximilians University, Munich, Germany
| | - Ludwig Patzer
- Department of Pediatric Nephrology, Children's Hospital St. Elisabeth and St. Barbara, Halle/Saale, Germany
| | - Adrian Lungu
- Pediatric Nephrology Department, Fundeni Clinical Institute, Bucharest, Romania
| | - Gordana Milosevski-Lomic
- Institute for Mother and Child Health Care of Serbia "Dr Vukan Čupić", Department of Nephrology, University of Belgrade, Faculty of Medicine, Belgrade, Serbia
| | - Roman Günthner
- Department of Nephrology, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Matthias C Braunisch
- Department of Nephrology, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Jasmina Ćomić
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
- Department of Nephrology, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
| | - Julia Hoefele
- Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, TUM School of Medicine and Health, Munich, Germany
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West EC, Chiappetta M, Mattingly AA, Congedo MT, Evangelista J, Campanella A, Sassorossi C, Flamini S, Rossi T, Pistoni M, Abenavoli L, Margaritora S, Lococo F, Boccuto L. BRCA1-associated protein 1: Tumor predisposition syndrome and Kury-Isidor syndrome, from genotype-phenotype correlation to clinical management. Clin Genet 2024. [PMID: 38506155 DOI: 10.1111/cge.14507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/27/2024] [Accepted: 02/07/2024] [Indexed: 03/21/2024]
Abstract
The BAP1 tumor suppressor gene encodes a deubiquitinase enzyme involved in several cellular activities, including DNA repair and apoptosis. Germline pathogenic variants in BAP1 have been associated with heritable conditions including BAP1 tumor predisposition syndrome 1 (BAP1-TPDS1) and a neurodevelopmental disorder known as Kury-Isidor syndrome (KURIS). Both these conditions are caused by monoallelic, dominant alterations of BAP1 but have never been reported in the same subject or family, suggesting a mutually exclusive genotype-phenotype correlation. This distinction is extremely important considering the early onset and aggressive nature of the types of cancer reported in individuals with TPDS1. Genetic counseling in subjects with germline BAP1 variants is fundamental to predicting the effect of the variant and the expected phenotype, assessing the potential risk of developing cancer for the tested subject and the family members who may carry the same variant and providing the multidisciplinary clinical team with the proper information to establish precise surveillance and management protocols.
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Affiliation(s)
- Elizabeth Casey West
- Healthcare Genetics and Genomics, School of Nursing, Clemson University, Clemson, South Carolina, USA
| | - Marco Chiappetta
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Aubrey Anne Mattingly
- Healthcare Genetics and Genomics, School of Nursing, Clemson University, Clemson, South Carolina, USA
| | - Maria Teresa Congedo
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Jessica Evangelista
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Annalisa Campanella
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Carolina Sassorossi
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Sara Flamini
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Teresa Rossi
- Laboratory of Translational Research, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Mariaelena Pistoni
- Laboratory of Translational Research, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Ludovico Abenavoli
- Department of Health Sciences, University "Magna Graecia", Catanzaro, Italy
| | - Stefano Margaritora
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Filippo Lococo
- Thoracic Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Luigi Boccuto
- Healthcare Genetics and Genomics, School of Nursing, Clemson University, Clemson, South Carolina, USA
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6
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Cetica V, Pisano T, Lesca G, Marafi D, Licchetta L, Riccardi F, Mei D, Chung HYB, Bayat A, Balasubramanian M, Lowenstein DH, Endzinienė M, Alotaibi M, Villeneuve N, Jacobs J, Isidor B, Solazzi R, den Hollander NS, Marjanovic D, Rougeot-Jung C, Jung J, Lesieur-Sebellin M, Accogli A, Salpietro V, Saadi NW, Panagiotakaki E, Foiadelli T, Redon S, Tsai MH, Bisulli F, Hammer TB, Lupski JR, Parrini E, Guerrini R. Clinical and molecular characterization of patients with YWHAG-related epilepsy. Epilepsia 2024. [PMID: 38491959 DOI: 10.1111/epi.17939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/15/2024] [Accepted: 02/22/2024] [Indexed: 03/18/2024]
Abstract
OBJECTIVE YWHAG variant alleles have been associated with a rare disease trait whose clinical synopsis includes an early onset epileptic encephalopathy with predominantly myoclonic seizures, developmental delay/intellectual disability, and facial dysmorphisms. Through description of a large cohort, which doubles the number of reported patients, we further delineate the spectrum of YWHAG-related epilepsy. METHODS We included in this study 24 patients, 21 new and three previously described, with pathogenic/likely pathogenic variants in YWHAG. We extended the analysis of clinical, electroencephalographic, brain magnetic resonance imaging, and molecular genetic information to 24 previously published patients. RESULTS The phenotypic spectrum of YWHAG-related disorders ranges from mild developmental delay to developmental and epileptic encephalopathy (DEE). Epilepsy onset is in the first 2 years of life. Seizure freedom can be achieved in half of the patients (13/24, 54%). Intellectual disability (23/24, 96%), behavioral disorders (18/24, 75%), neurological signs (13/24, 54%), and dysmorphisms (6/24, 25%) are common. A genotype-phenotype correlation emerged, as DEE is more represented in patients with missense variants located in the ligand-binding domain than in those with truncating or missense variants in other domains (90% vs. 19%, p < .001). SIGNIFICANCE This study suggests that pathogenic YWHAG variants cause a wide range of clinical presentations with variable severity, ranging from mild developmental delay to DEE. In this allelic series, a genotype-phenotype correlation begins to emerge, potentially providing prognostic information for clinical management and genetic counseling.
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Affiliation(s)
- Valentina Cetica
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Tiziana Pisano
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Gaetan Lesca
- Université Lyon 1, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Physiopathologie et Génétique du Neurone et du Muscle, Institut NeuroMyoGène, Lyon, France
- Department of Genetics, University Hospitals of Lyon, Hospices Civils de Lyon, Lyon, France
| | - Dana Marafi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Department of Pediatrics, Faculty of Medicine, Kuwait University, Safat, Kuwait
| | - Laura Licchetta
- Istituto di Ricovero e Cura a Carattere Scientifico IRCCS, Istituto delle Scienze Neurologiche di Bologna, full member of the European Reference Network EpiCARE, Bologna, Italy
| | - Florence Riccardi
- Aix-Marseille University, Institut National de la Santé et de la Recherche Médicale (INSERM), Marseille Medical Genetics, Marseille, France
- Centre Hospitalier Intercommunal Toulon - La Seyne sur Mer (CHITS), Hôpital Ste Musse, Service de Génétique Médicale, Toulon, France
| | - Davide Mei
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Hon-Yin B Chung
- Department of Paediatrics and Adolescent Medicine, School of Clinical Medicine, Li Ka Shing (LKS) Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - Allan Bayat
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
- Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Center, Dianalund, Denmark
| | - Meena Balasubramanian
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
- Sheffield Clinical Genetics Service, Sheffield Children's National Health Service (NHS) Foundation Trust, Sheffield, UK
| | - Daniel H Lowenstein
- Department of Neurology, University of California, San Francisco, California, USA
| | - Milda Endzinienė
- Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | | | - Nathalie Villeneuve
- Depatment of Pediatric Neurology, Assistance Publique-Hopitaux de Marseille (AP-HM), Hôpital de la Timone Enfants, Marseille, France
| | - Julia Jacobs
- Alberta Children's Research Institute, Hodgekiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Bertrand Isidor
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Nantes, Nantes, France
- Université de Nantes, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), l'Institut du Thorax, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - Roberta Solazzi
- Department of Pediatric Neuroscience, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | | | | | | | - Julien Jung
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon, Université de Lyon, Lyon, France
| | - Marion Lesieur-Sebellin
- Department of Genomic Medicine of Rare Disorders, Necker Hospital, University Paris Cité, Paris, France
| | - Andrea Accogli
- Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Vincenzo Salpietro
- Department of Neuromuscular Disorders, Queen Square Institute of Neurology, University College London, London, UK
| | - Nebal W Saadi
- College of Medicine, University of Baghdad, Baghdad, Iraq
- Children Welfare Teaching Hospital, Baghdad, Iraq
| | - Eleni Panagiotakaki
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon, Université de Lyon, Lyon, France
| | - Thomas Foiadelli
- Clinica Pediatrica, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico IRCCS Policlinico San Matteo, Pavia, Italy
- Department of Clinical, Surgical, Diagnostic, and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Sylvia Redon
- Service de Génétique Médicale, Centre Hospitalier et Universitaire de Brest, Brest, France
- Université de Brest, Institut National de la Santé et de la Recherche Médicale (INSERM), Etablissement Français du Sang, UMR 1078, Brest, France
- Centre de Référence Déficiences Intellectuelles de Causes Rares, Brest, France
| | - Meng-Han Tsai
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- School of Medicine, Chang Gung University, Kaohsiung, Taiwan
| | - Francesca Bisulli
- Istituto di Ricovero e Cura a Carattere Scientifico IRCCS, Istituto delle Scienze Neurologiche di Bologna, full member of the European Reference Network EpiCARE, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Trine B Hammer
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Center, Dianalund, Denmark
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
- Texas Children's Hospital, Houston, Texas, USA
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Elena Parrini
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Renzo Guerrini
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
- University of Florence, Florence, Italy
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Liang H, Zhan X, Wang Y, Maegawa GHB, Zhang H. Development and validation of a new genotype-phenotype correlation for Niemann-Pick disease type C1. J Inherit Metab Dis 2024; 47:317-326. [PMID: 38131230 DOI: 10.1002/jimd.12705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 11/29/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
Hundreds of NPC1 variants cause highly heterogeneous phenotypes. This study aims to explore the genotype-phenotype correlation of NPC1, especially for missense variants. In a well-characterized cohort, phenotypes are graded into three clinical forms: mild, intermediate, and severe. Missense residue structural location was stratified into three categories: surface, partially, and fully buried. The association of phenotypes with the topography of the amino acid substitution in the protein structure was investigated in our cohort and validated in two reported cohorts. One hundred six unrelated NPC1 patients were enrolled. A significant correlation of genotype-phenotype was found in 81 classified individuals with two or one (the second was null variant) missense variant (p < 0.001): of 25 patients with at least one missense variant of surface (group A), 19 (76%) mild, six (24%) intermediate, and none severe; of 31 cases with at least one missense variant of partially buried without surface variants (group B), 11 (35%) mild, 16 (52%) intermediate, and four (13%) severe; of the remaining 25 patients with two or one buried missense variants (group C), eight (32%) mild, nine (36%) intermediate, and eight (32%) severe. Additionally, 7-ketocholesterol, the biomarker, was lower in group A than in group B (p = 0.024) and group C (p = 0.029). A model was proposed that accurately predicted phenotypes of 72 of 90 (80%), 73 of85 (86%), and 64 of 69 (93%) patients in our cohort, Italian, and UK cohort, respectively. This study proposed a novel genotype-phenotype correlation in NPC1, linking the underlying molecular pathophysiology with clinical phenotype and aiding genetic counseling and evaluation in clinical practice.
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Affiliation(s)
- Huan Liang
- Pediatric Endocrinology and Genetics, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xia Zhan
- Pediatric Endocrinology and Genetics, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Wang
- Pediatric Endocrinology and Genetics, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Gustavo H B Maegawa
- Department of Pediatrics, Metabolism and Genetics, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, USA
| | - Huiwen Zhang
- Pediatric Endocrinology and Genetics, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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8
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Cutillo G, Masnada S, Lesca G, Ville D, Accorsi P, Giordano L, Pichiecchio A, Valente M, Borrelli P, Ferraro OE, Veggiotti P. Electroclinical features and phenotypic differences in adenylosuccinate lyase deficiency: Long-term follow-up of seven patients from four families and appraisal of the literature. Epilepsia Open 2024; 9:106-121. [PMID: 37842880 PMCID: PMC10839293 DOI: 10.1002/epi4.12837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 09/17/2023] [Indexed: 10/17/2023] Open
Abstract
OBJECTIVE Adenylosuccinate lyase (ADSL) deficiency is a rare inherited metabolic disorder with a wide phenotypic presentation, classically grouped into three types (neonatal, type I, and type II). We aim to better delineate the pathological spectrum, focusing on the electroclinical characteristics and phenotypic differences of patients with ADSL deficiency. PATIENTS AND METHODS Seven patients, from four different families, underwent serial electroencephalogram (EEG), clinical assessment, and neuroimaging. We also performed a systematic review of the cases published in the literature, summarizing the available clinical, neurophysiological, and genetic data. RESULTS We report seven previously unreported ADSL deficiency patients with long-term follow-up (10-34 years). From the literature review, we collected 81 previously reported cases. Of the included patient population, 58 % (51/88) were classified as having ADSL deficiency type I, 28% (25/88) as having type II, and 14% (12/88) as having neonatal. The most frequently reported pathogenic variants are p.R426H homozygous (19 patients), p.Y114H in compound heterozygosity (13 patients), and p.D430N homozygous (6 patients). In the majority (89.2%), disease onset was within the first year of life. Epilepsy is present in 81.8% of the patients, with polymorphic and often intractable seizures. EEG features seem to display common patterns and developmental trajectories: (i) poor general background organization with theta-delta activity; (ii) hypsarrhythmia with spasms, usually adrenocorticotropic hormone-responsive; (iii) generalized epileptic discharges with frontal or frontal temporal predominance; and (iv) epileptic discharge activation in sleep with an altered sleep structure. Imaging features present consistent findings of cerebral atrophy with frontal predominance, cerebellar atrophy, and white matter abnormalities among the three types. SIGNIFICANCE ADSL deficiency presents variable phenotypic expression, whose severity could be partially attributed to residual activity of the mutant protein. Although a precise phenotype-genotype correlation was not yet feasible, we delineated a common pattern of clinical, neuroradiological, and neurophysiological features.
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Affiliation(s)
- Gianni Cutillo
- Department of Pediatric Neurology, Pediatric Neurology UnitBuzzi Children's HospitalMilanItaly
| | - Silvia Masnada
- Department of Pediatric Neurology, Pediatric Neurology UnitBuzzi Children's HospitalMilanItaly
| | - Gaetan Lesca
- Department of GeneticsLyon University HospitalsLyonFrance
| | - Dorothée Ville
- Derpartment of Pediatric NeurologyLyon University HospitalLyonFrance
| | | | - Lucio Giordano
- Child Neuropsychiatric DivisionSpedali CiviliBresciaItaly
| | - Anna Pichiecchio
- Neuroradiology DepartmentIRCCS C.Mondino National Neurological InstitutePaviaItaly
| | - Marialuisa Valente
- Clinical Pathology Unit, Medical Genetics SectionSS. Annunziata HospitalTarantoItaly
| | - Paola Borrelli
- Department of Medical, Oral and Biotechnological Sciences, Laboratory of BiostatisticsUniversity “G. D'Annunzio”PescaraItaly
| | - Ottavia Eleonora Ferraro
- Department of Public Health, Experimental and Forensic Medicine, Unit of Biostatistics and Clinical EpidemiologyUniversity of PaviaPaviaItaly
| | - Pierangelo Veggiotti
- Department of Pediatric Neurology, Pediatric Neurology UnitBuzzi Children's HospitalMilanItaly
- Department of Biomedical and Clinical SciencesUniversity of MilanMilanItaly
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9
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Beryozkin A, Sher I, Ehrenberg M, Zur D, Newman H, Gradstein L, Simaan F, Rotenstreich Y, Goldenberg-Cohen N, Bahar I, Blumenfeld A, Rivera A, Rosin B, Deitch-Harel I, Perlman I, Mechoulam H, Chowers I, Leibu R, Ben-Yosef T, Pras E, Banin E, Sharon D, Khateb S. Best Disease: Global Mutations Review, Genotype-Phenotype Correlation, and Prevalence Analysis in the Israeli Population. Invest Ophthalmol Vis Sci 2024; 65:39. [PMID: 38411968 PMCID: PMC10910552 DOI: 10.1167/iovs.65.2.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 02/04/2024] [Indexed: 02/28/2024] Open
Abstract
Purpose To review all reported disease-causing mutations in BEST1, perform genotype-phenotype correlation, and estimate disease prevalence in the Israeli population. Methods Medical records of patients diagnosed with Best disease and allied diseases from nine Israeli medical centers over the past 20 years were collected, as were clinical data including ocular findings, electrophysiology results, and retina imaging. Mutation detection involved mainly whole exome sequencing and candidate gene analysis. Demographic data were obtained from the Israeli Bureau of Statistics (January 2023). A bibliometric study was also conducted to gather mutation data from online sources. Results A total of 134 patients were clinically diagnosed with Best disease and related conditions. The estimated prevalence of Best disease was calculated to be 1 in 127,000, with higher rates among Arab Muslims (1 in 76,000) than Jews (1 in 145,000). Genetic causes were identified in 76 individuals (57%), primarily showing autosomal-dominant inheritance due to BEST1 mutations (58 patients). Critical conserved domains were identified consisting of a high percentage of dominant missense mutations, primarily in transmembrane domains and the intracellular region (Ca2+ binding domain) of the BEST1 protein. Conclusions This study represents the largest cohort of patients with Best disease reported in Israel and globally. The prevalence in Israel is akin to that in Denmark but is lower than that in the United States. Critical conserved domains within the BEST1 protein are pivotal for normal functioning, and even minor missense alterations in these areas lead to a dominant disease manifestation. Genetic testing is indispensable as the gold standard for Best disease diagnosis due to the variable clinical presentation of the disease.
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Affiliation(s)
- Avigail Beryozkin
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Ifat Sher
- Goldschleger Eye Institute, Sheba Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Miriam Ehrenberg
- Ophthalmology Unit, Schneider Children's Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Dinah Zur
- Ophthalmology Division, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hadas Newman
- Ophthalmology Division, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Libe Gradstein
- Department of Ophthalmology, Soroka Medical Center and Clalit Health Services, Faculty of Health Sciences, Ben-Gurion University, Be'er Sheva, Israel
| | - Francis Simaan
- Department of Ophthalmology, Assaf Harofeh Medical Center, Zerifin, Israel
| | - Ygal Rotenstreich
- Goldschleger Eye Institute, Sheba Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nitza Goldenberg-Cohen
- Department of Ophthalmology, Bnai Zion Medical Center, Haifa, Israel
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Irit Bahar
- Ophthalmology Division, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Ophthalmology Department and Laboratory of Eye Research, Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva, Israel
| | - Anat Blumenfeld
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Antonio Rivera
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Boris Rosin
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Iris Deitch-Harel
- Ophthalmology Department and Laboratory of Eye Research, Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva, Israel
| | - Ido Perlman
- Ophthalmology Division, Tel Aviv Medical Center, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Hadas Mechoulam
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Itay Chowers
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Rina Leibu
- Department of Ophthalmology, Rambam Health Care Center, Haifa, Israel
| | - Tamar Ben-Yosef
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Eran Pras
- Department of Ophthalmology, Assaf Harofeh Medical Center, Zerifin, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eyal Banin
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Dror Sharon
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Samer Khateb
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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10
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Yang Q, Zhang Q, Yi S, Zhang S, Yi S, Zhou X, Qin Z, Chen B, Luo J. Novel germline variants in KMT2C in Chinese patients with Kleefstra syndrome-2. Front Neurol 2024; 15:1340458. [PMID: 38356881 PMCID: PMC10864639 DOI: 10.3389/fneur.2024.1340458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 01/10/2024] [Indexed: 02/16/2024] Open
Abstract
Kleefstra syndrome (KLEFS) refers to a rare inherited neurodevelopmental disorder characterized by intellectual disability (ID), language and motor delays, behavioral abnormalities, abnormal facial appearance, and other variable clinical features. KLEFS is subdivided into two subtypes: Kleefstra syndrome-1 (KLEFS1, OMIM: 610253), caused by a heterozygous microdeletion encompassing the Euchromatic Histone Lysine Methyltransferase 1 (EHMT1) gene on chromosome 9q34.3 or pathogenic variants in the EHMT1 gene, and Kleefstra syndrome-2 (KLEFS2, OMIM: 617768), caused by pathogenic variants in the KMT2C gene. More than 100 cases of KLEFS1 have been reported with pathogenic variants in the EHMT1 gene. However, only 13 patients with KLEFS2 have been reported to date. In the present study, five unrelated Chinese patients were diagnosed with KLEFS2 caused by KMT2C variants through whole-exome sequencing (WES). We identified five different variants of the KMT2C gene in these patients: c.9166C>T (p.Gln3056*), c.9232_9247delCAGCGATCAGAACCGT (p.Gln3078fs*13), c.5068dupA (p.Arg1690fs*10), c.10815_10819delAAGAA (p.Lys3605fs*7), and c.6911_6912insA (p.Met2304fs*8). All five patients had a clinical profile similar to that of patients with KLEFS2. To analyze the correlation between the genotype and phenotype of KLEFS2, we examined 18 variants and their associated phenotypes in 18 patients with KLEFS2. Patients carrying KMT2C variants presented with a wide range of phenotypic defects and an extremely variable phenotype. We concluded that the core phenotypes associated with KMT2C variants were intellectual disability, facial dysmorphisms, language and motor delays, behavioral abnormalities, hypotonia, short stature, and weight loss. Additionally, sex may be one factor influencing the outcome. Our findings expand the phenotypic and genetic spectrum of KLEFS2 and help to clarify the genotype-phenotype correlation.
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Affiliation(s)
- Qi Yang
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Qiang Zhang
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Sheng Yi
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Shujie Zhang
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Shang Yi
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Xunzhao Zhou
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Zailong Qin
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Biyan Chen
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Jingsi Luo
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Department of Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
- Guangxi Clinical Research Center for Pediatric Diseases, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
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Sanavia T, Turina P, Morante S, Consalvi V, Lesk AM, Bakolitsa C, Dell'Orco D. Editorial: Computational and experimental protein variant interpretation in the era of precision medicine. Front Mol Biosci 2024; 11:1363813. [PMID: 38293601 PMCID: PMC10823009 DOI: 10.3389/fmolb.2024.1363813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/04/2024] [Indexed: 02/01/2024] Open
Affiliation(s)
- Tiziana Sanavia
- Department of Medical Sciences, Computational Biomedicine Unit, University of Torino, Torino, Italy
| | - Paola Turina
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Silvia Morante
- Department of Physics, University of Roma Tor Vergata, Roma, Italy
- Istituto Nazionale di Fisica Nucleare, University of Roma Tor Vergata, Roma, Italy
| | - Valerio Consalvi
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Roma, Roma, Italy
| | - Arthur M. Lesk
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, United States
| | - Constantina Bakolitsa
- Department of Plant and Microbial Biology and Center for Computational Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Daniele Dell'Orco
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Biological Chemistry, University of Verona, Verona, Italy
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12
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Tian R, Tong P, He Y, Zang L, Zhou S, Tian Q. Exome sequencing-aided precise diagnosis of four families with type I Stickler syndrome. Mol Genet Genomic Med 2024; 12:e2331. [PMID: 38073514 PMCID: PMC10767595 DOI: 10.1002/mgg3.2331] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 03/11/2023] [Accepted: 11/28/2023] [Indexed: 01/07/2024] Open
Abstract
BACKGROUND Stickler syndrome is a multisystemic disorder characterized by ophthalmological and non-ophthalmological abnormalities, frequently misdiagnosed due to high clinical heterogeneity. Stickler syndrome type I (STL1) is predominantly caused by mutations in the COL2A1 gene. METHODS Exome sequencing and co-segregation analysis were utilized to scrutinize 35 families with high myopia, and pathogenic mutations were identified. Mutant COL2A1 was overexpressed in cells for mechanistic study. A retrospective genotype-phenotype correlation analysis was further conducted. RESULTS Two novel pathogenic mutations (c.2895+1G>C and c.3505G>A (p.Val1169Ile)) and two reported mutations (c.1597C>T (p.Arg533*) and c.1693C>T (p.Arg565Cys)) in COL2A1 were identified causing STL1. These mutations are all in the G-X-Y triplet, and c.2895+1G>C contributed to aberrant RNA splicing. COL2A1 mutants tended to form large aggregates in the endoplasmic reticulum (ER) and elevated ER stress. Additionally, mutations c.550G>A (p.Ala184Thr) and c.2806G>A (p.Gly936Ser) in COL2A1 were found in high myopia families, but were likely benign, although c.2806G>A (p.Gly936Ser) is on G-X-Y triplet. Moreover, genotype-phenotype correlation analysis revealed that mutations in exon 2 mainly contribute to retinal detachment, whereas mutations in the collagen alpha-1 chain region of COL2A1 tend to cause non-ophthalmologic symptoms. CONCLUSION This study broadens the COL2A1 gene mutation spectrum, provides evidence for ER stress caused by pathogenic COL2A1 mutations and highlights the importance of non-ophthalmological examination in clinical diagnosis of high myopia.
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Affiliation(s)
- Runyi Tian
- Center for Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Institute of Molecular Precision MedicineXiangya Hospital, Central South UniversityChangshaChina
| | - Ping Tong
- Department of Ophthalmology, The Second Xiangya HospitalCentral South UniversityChangshaChina
| | - Yuhong He
- Institute of Molecular Precision MedicineXiangya Hospital, Central South UniversityChangshaChina
| | - Liyu Zang
- Center for Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human Disease, School of Life SciencesCentral South UniversityChangshaChina
| | - Shimin Zhou
- Center for Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human Disease, School of Life SciencesCentral South UniversityChangshaChina
| | - Qi Tian
- Center for Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Medical Genetics, School of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human Disease, School of Life SciencesCentral South UniversityChangshaChina
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13
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Zheng Z, Ding L, Wang M, Zhang Y, Yang Y, Tang M, Xu J, Wang L, Wu J, Li H. Hearing characteristics and otoradiological abnormalities in three patients with novel pathogenic variants of KMT2D-related Kabuki syndrome. Mol Genet Genomic Med 2024; 12:e2306. [PMID: 37921229 PMCID: PMC10767598 DOI: 10.1002/mgg3.2306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 09/13/2023] [Accepted: 10/13/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND Kabuki syndrome 1 (KS1; OMIM:147920), which is characterized by distinctive dysmorphic facial features (such as arched eyebrows, long palpebral fissures with eversion of the lower lid, and large protuberant ears), intellectual disability, short stature, and dermatoglyphic and skeletal abnormalities, is brought on by pathogenic variants in KMT2D (OMIM:602113). In this work, three individuals with novel pathogenic KMT2D gene variants had their longitudinal audiological manifestations and ear structural characteristics outlined. METHODS The longitudinal audiological data from neonatal hearing screening and a battery of several hearing tests were evaluated. The battery of hearing tests included tympanometry, distortion product otoacoustic emission (DPOAE), click-evoked air-conduction auditory brain-stem response (AC-ABR), click-evoked bone-conduction auditory brain-stem response (BC-ABR), narrow band CE-chirp auditory steady-state response (NB CE-chirp ASSR), and pure-tone audiometry (PTA). Phenotype identification and whole exome sequencing (WES) were performed on recruited individuals. RESULTS All three patients (two females and on male; last evaluations at 14 months, 11 months, and 5.7 years, respectively) failed the newborn hearing screening, and the audiological follow-up data revealed mild to profound fluctuating hearing loss, which was directly influenced by the incidence and severity of otitis media with effusion (OME). When OME occurred, the AC-ABR thresholds increased from 30-75 dBnHL to 45-90 dBnHL. The threshold for the BC-ABR and BC-PTA was between 25 and 50 dBnHL, indicating mild to moderate sensorineural hearing loss (SNHL). The high-resolution computed tomography (HRCT) pictures indicated that all three patients had middle and inner ear abnormalities. Middle ear anomalies showed as diminished mastoid gasification and ossicle dysplasia. Cochlear dysplasia, a dilated vestibule, fusion of the vestibule with the horizontal semicircular canals, and a short and thick horizontal semicircular canal were visible on images of the inner ear. This study recruited three individuals with three novel pathogenic variants (c.5104C>T, c.10205delA, and c.12840delC) of KMT2D who were identified at ages 27 days, 2 months, and 5.5 years. CONCLUSIONS Hearing characteristics of three individuals with three novel pathogenic variants of KMT2D range from mild to profound fluctuating hearing loss with mild to moderate SNHL. HRCT scans showed that all three individuals had anatomical middle and inner ear abnormalities. KS 1 patients must get clinical therapy for OME, frequent auditory monitoring, and prompt intervention.
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Affiliation(s)
- Zhoushu Zheng
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Lu Ding
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Meihong Wang
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Yinghui Zhang
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Yihui Yang
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Ming Tang
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Jun Xu
- Department of OtolaryngologyNingbo Yinzhou No.2 HospitalNingboChina
| | - Liangjiong Wang
- Department of RadiologyNingbo Medical Center Lihuili HospitalNingboChina
| | - Junhua Wu
- Department of OtolaryngologyNingbo Women and Children's HospitalNingboChina
| | - Haibo Li
- The Central Laboratory of Birth Defects Prevention and ControlNingbo Women and Children's HospitalNingboChina
- Ningbo Key Laboratory for the Prevention and Treatment of Embryogenic DiseasesNingbo Women and Children's HospitalNingboChina
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14
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Shimamoto Y, Takeuchi Y, Ishiguro S, Nakatsuka S, Yunokizaki H, Ezoe Y, Nakajima T, Tanaka K, Ishihara R, Takayama T, Yoshida T, Sugano K, Mutoh M, Ishikawa H. Genotype-phenotype correlation for extracolonic aggressive phenotypes in patients with familial adenomatous polyposis. Cancer Sci 2023; 114:4596-4606. [PMID: 37798255 PMCID: PMC10728006 DOI: 10.1111/cas.15945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/03/2023] [Accepted: 08/18/2023] [Indexed: 10/07/2023] Open
Abstract
Familial adenomatous polyposis (FAP) patients develop various life-threatening extracolonic comorbidities that appear individually or within a family. This diversity can be explained by the localization of the adenomatous polyposis coli (APC) variant, but few reports provide definitive findings about genotype-phenotype correlations. Therefore, we investigated FAP patients and the association between the severe phenotypes and APC variants. Of 247 FAP patients, 126 patients from 85 families identified to have APC germline variant sites were extracted. These sites were divided into six groups (Regions A to F), and the frequency of severe comorbidities was compared among the patient phenotypes. Of the 126 patients, the proportions of patients with desmoid tumor stage ≥III, number of FGPs ≥1000, multiple gastric neoplasms, gastric neoplasm with high-grade dysplasia, and Spigelman stage ≥III were 3%, 16%, 21%, 12%, and 41%, respectively, while the corresponding rates were 30%, 50%, 70%, 50%, and 80% in patients with Region E (codons 1398-1580) variants. These latter rates were significantly higher than those for patients with variants in other regions. Moreover, the proportion of patients with all three indicators (desmoid tumor stage ≥III, number of FGPs ≥1000, and Spigelman stage ≥III) was 20% for those with variants in Region E and 0% for those with variants in other regions. Variants in Region E indicate aggressive phenotypes, and more intensive management is required.
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Affiliation(s)
- Yusaku Shimamoto
- Department of Gastrointestinal OncologyOsaka International Cancer InstituteOsakaJapan
| | - Yoji Takeuchi
- Department of Gastrointestinal OncologyOsaka International Cancer InstituteOsakaJapan
- Department of Genetic Oncology, Division of Hereditary TumorsOsaka International Cancer InstituteOsakaJapan
- Department of Gastroenterology and HepatologyGunma University Graduate School of MedicineMaebashiJapan
| | | | - Shin‐ichi Nakatsuka
- Department of Diagnostic Pathology and CytologyOsaka International Cancer InstituteOsakaJapan
| | | | - Yasumasa Ezoe
- Medical Ethics and Medical Genetics, School of Public HealthKyoto UniversityKyotoJapan
| | - Takeshi Nakajima
- Medical Ethics and Medical Genetics, School of Public HealthKyoto UniversityKyotoJapan
| | - Kumiko Tanaka
- Department of Gastroenterology and Oncology, Institute of Biomedical SciencesTokushima University Graduate SchoolTokushimaJapan
| | - Ryu Ishihara
- Department of Gastrointestinal OncologyOsaka International Cancer InstituteOsakaJapan
| | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Institute of Biomedical SciencesTokushima University Graduate SchoolTokushimaJapan
| | - Teruhiko Yoshida
- Department of Genetic Medicine and ServicesNational Cancer Center HospitalTokyoJapan
| | - Kokichi Sugano
- Department of Genetic Medicine, Sasaki FoundationKyoundo HospitalTokyoJapan
| | - Michihiro Mutoh
- Department of Molecular‐Targeting Prevention, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
| | - Hideki Ishikawa
- Ishikawa Gastroenterology ClinicOsakaJapan
- Department of Molecular‐Targeting Prevention, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
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Pham HM, Nguyen DP, Ta TD, Le TP, Phan PH, Trinh HA, Tran TV, Luong TLA, Nguyen HM, Bui T, Tran TH, Ta TV, Tran V. In silico validation revealed the role of SCN5A mutations and their genotype-phenotype correlations in Brugada syndrome. Mol Genet Genomic Med 2023; 11:e2263. [PMID: 37547970 PMCID: PMC10724507 DOI: 10.1002/mgg3.2263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 07/03/2023] [Accepted: 07/19/2023] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND Brugada syndrome (BrS) is a rare genetic disease that causes sudden cardiac death (SCD) and arrhythmia. SCN5A pathogenic variants (about 30% of diagnosed patients) are responsible for BrS. AIMS Lack of knowledge regarding molecular characteristics and the correlation between genotype and phenotype interfere with the risk stratification and finding the optimal treatment in Vietnam. Therefore, we identified SCN5A variants and evaluated the genotype-phenotype correlation of BrS on 117 Vietnamese probands. MATERIALS AND METHODS The clinical characteristics and blood samples of BrS patients were collected. To determine SCN5A variants, Sanger sequencing was conducted, and subsequently, these variants were analyzed by bioinformatic tools. RESULTS In this cohort, the overall rate of detected variants in SCN5A was 25.6%, which could include both pathogenic and benign variants. In genetic testing, 21 SCN5A variants were identified, including eight novels and 15 published variants. Multiple bioinformatic tools were used to predict variant effect with c.551A>G, c.1890+14G>A, c.3338C>T, c.3578G>A, and c.5484C>T as benign, while other variants were predicted as disease-causing. The family history of SCD (risk ratio [RR] = 4.324, 95% CI: 2.290-8.269, p < 0.001), syncope (RR = 3.147, 95% CI: 1.668-5.982, p = 0.0004), and ventricular tachycardia/ventricular fibrillation (RR = 3.406, 95% CI: 1.722-5.400, p = 0.0035) presented a significantly higher risk in the SCN5A (+) group, consisting of individuals carrying any variant in the SCN5A gene, compared to SCN5A (-) individuals. CONCLUSION The results contribute to clarifying the impact of SCN5A variants on these phenotypes. Further follow-up studies need to be carried out to understand the functional effects of these SCN5A variants on the severity of BrS.
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Affiliation(s)
- Hung Manh Pham
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
- Vietnam National Heart InstituteBach Mai HospitalHanoiVietnam
| | - Duy Phuong Nguyen
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
- Ho Chi Minh City Heart InstituteHo Chi MinhVietnam
| | - Thanh Dat Ta
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
| | - Thi Phuong Le
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
| | - Phong Hai Phan
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
- Vietnam National Heart InstituteBach Mai HospitalHanoiVietnam
| | | | - Tuan Viet Tran
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
- Vietnam National Heart InstituteBach Mai HospitalHanoiVietnam
| | - Thi Lan Anh Luong
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
| | - Ha Minh Nguyen
- Hue Central HospitalHueVietnam
- Pham Ngoc Thanh UniversityHo Chi MinhVietnam
| | - The‐Hung Bui
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
- Center for Molecular Medicine, Clinical Genetics UnitKarolinska Institutet, Karolinska University HospitalStockholmSweden
| | - Thinh Huy Tran
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
| | - Thanh Van Ta
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
| | - Van‐Khanh Tran
- Center for Gene and Protein ResearchHanoi Medical UniversityHanoiVietnam
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16
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Liu K, Chen R, Wang X, Gong Y, Shi J, Gu B, Zhou Y, Cai W. Biallelic ANKS6 null variants cause notable extrarenal phenotypes in a nephronophthisis patient and lead to hepatobiliary abnormalities by YAP1 deficiency. Clin Genet 2023; 104:625-636. [PMID: 37525964 DOI: 10.1111/cge.14412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/02/2023]
Abstract
The ankyrin repeat and sterile alpha motif domain containing 6 (ANKS6) gene, encoding an inversin compartment protein of the primary cilium, was recently reported as a pathogenic gene of nephronophthisis (MIM PS256100). Extrarenal manifestations are frequently observed in this disease, however, potential genotype-phenotype correlations and the underlying mechanisms remain poorly understood. Here we described an infant with kidney failure, hepatobiliary abnormalities, and heart disease, in whom whole exome sequencing identified compound heterozygous variants in ANKS6, including a novel nonsense variant p.Trp458* and a recurrent splicing variant c.2394+1G > A. mRNA expression studies showed that the splicing variant caused aberrant mRNA splicing with exon 13 skipping and the biallelic variants were predicted to cause loss of ANKS6 function. We systematically characterized the clinical and genetic spectra of the disease and revealed that biallelic null variants in ANKS6 cause more severe kidney disease and more extrarenal manifestations, thus establishing a clear genotype-phenotype correlation for the disease. Further evaluations showed that ANKS6 deficiency reduced YAP1 expression in the patient's bile duct epithelium and ANKS6 promotes YAP1 transcriptional activity in a dose-dependent manner, indicating that loss of ANKS6 function causes hepatobiliary abnormalities through YAP1 deficiency during biliary morphogenesis and development, which may offer new therapeutic targets.
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Affiliation(s)
- Keqiang Liu
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
- Shanghai Institute for Pediatric Research, Shanghai, China
| | - Ru Chen
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoying Wang
- Department of Pathology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiming Gong
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jia Shi
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Beilin Gu
- Shanghai Institute for Pediatric Research, Shanghai, China
| | - Ying Zhou
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Cai
- Department of Pediatric Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
- Shanghai Institute for Pediatric Research, Shanghai, China
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17
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Buijsse N, Jansen FE, Ockeloen CW, van Kempen MJA, Zeidler S, Willemsen MH, Scarano E, Monticone S, Zonneveld‐Huijssoon E, Low KJ, Bayat A, Sisodiya SM, Samanta D, Lesca G, de Jong D, Giltay JC, Verbeek NE, Kleefstra T, Brilstra EH, Vlaskamp DRM. Epilepsy is an important feature of KBG syndrome associated with poorer developmental outcome. Epilepsia Open 2023; 8:1300-1313. [PMID: 37501353 PMCID: PMC10690702 DOI: 10.1002/epi4.12799] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/06/2023] [Indexed: 07/29/2023] Open
Abstract
OBJECTIVE The aim of this study was to describe the epilepsy phenotype in a large international cohort of patients with KBG syndrome and to study a possible genotype-phenotype correlation. METHODS We collected data on patients with ANKRD11 variants by contacting University Medical Centers in the Netherlands, an international network of collaborating clinicians, and study groups who previously published about KBG syndrome. All patients with a likely pathogenic or pathogenic ANKRD11 variant were included in our patient cohort and categorized into an "epilepsy group" or "non-epilepsy group". Additionally, we included previously reported patients with (likely) pathogenic ANKRD11 variants and epilepsy from the literature. RESULTS We included 75 patients with KBG syndrome of whom 26 had epilepsy. Those with epilepsy more often had moderate to severe intellectual disability (42.3% vs 9.1%, RR 4.6 [95% CI 1.7-13.1]). Seizure onset in patients with KBG syndrome occurred at a median age of 4 years (range 12 months - 20 years), and the majority had generalized onset seizures (57.7%) with tonic-clonic seizures being most common (23.1%). The epilepsy type was mostly classified as generalized (42.9%) or combined generalized and focal (42.9%), not fulfilling the criteria of an electroclinical syndrome diagnosis. Half of the epilepsy patients (50.0%) were seizure free on anti-seizure medication (ASM) for at least 1 year at the time of last assessment, but 26.9% of patients had drug-resistant epilepsy (failure of ≥2 ASM). No genotype-phenotype correlation could be identified for the presence of epilepsy or epilepsy characteristics. SIGNIFICANCE Epilepsy in KBG syndrome most often presents as a generalized or combined focal and generalized type. No distinctive epilepsy syndrome could be identified. Patients with KBG syndrome and epilepsy had a significantly poorer neurodevelopmental outcome compared with those without epilepsy. Clinicians should consider KBG syndrome as a causal etiology of epilepsy and be aware of the poorer neurodevelopmental outcome in individuals with epilepsy.
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Affiliation(s)
- Nathan Buijsse
- Department of Medical GeneticsUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Floor E. Jansen
- Department of Pediatric Neurology, Brain CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Charlotte W. Ockeloen
- Department of Human GeneticsRadboud University Medical CenterNijmegenThe Netherlands
| | | | - Shimriet Zeidler
- Department of Clinical GeneticsErasmus Medical CenterRotterdamThe Netherlands
| | | | - Emanuela Scarano
- Department of PediatricsSt. Orsola‐Malpighi HospitalBolognaItaly
| | - Sonia Monticone
- Department of PediatricsAzienda Ospedaliero Universitaria Maggiore della CaritàNovaraItaly
| | | | - Karen J. Low
- Department of Clinical Genetics, University Hospitals Bristol and Weston NHS trustUniversity of BristolBristolUK
| | - Allan Bayat
- Department for Genetics and Personalized MedicineDanish Epilepsy CentreDianalundDenmark
- Institute for Regional Health ServicesUniversity of Southern DenmarkOdenseDenmark
| | - Sanjay M. Sisodiya
- Department of Clinical and Experimental EpilepsyUCL Queen Square Institute of Neurology and Chalfont Centre for EpilepsyChalfont St PeterUK
| | - Debopam Samanta
- Child Neurology Section, Department of PediatricsUniversity of Arkansas for Medical SciencesLittle RockArkansasUSA
| | - Gaetan Lesca
- Department of GeneticsUniversity Hospitals of LyonLyonFrance
| | - Danielle de Jong
- Department of NeurologyAcademic Center for Epileptology Kempenhaeghe/MUMC+HeezeThe Netherlands
| | - Jaqcues C. Giltay
- Department of Medical GeneticsUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Nienke E. Verbeek
- Department of Medical GeneticsUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Tjitske Kleefstra
- Department of Human GeneticsRadboud University Medical CenterNijmegenThe Netherlands
| | - Eva H. Brilstra
- Department of Medical GeneticsUniversity Medical Center UtrechtUtrechtThe Netherlands
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18
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Zhao W, Zhang Y, Lv T, He J, Zhu B. A case report of a novel HIST1H1E mutation and a review of the bibliography to evaluate the genotype-phenotype correlations. Mol Genet Genomic Med 2023; 11:e2273. [PMID: 37605493 PMCID: PMC10724515 DOI: 10.1002/mgg3.2273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 04/14/2023] [Accepted: 08/08/2023] [Indexed: 08/23/2023] Open
Abstract
BACKGROUND HIST1H1E is a member of the H1 gene family. Excess de novo likely gene-disruptive variants involving the C-terminal tail of HIST1H1E have been reported in neurodevelopmental disorders. Although clinical phenotypes in some patients have been described in single studies, few studies have reviewed the genotype and phenotype relationships using a relatively large cohort of patients with HIST1H1E variants. METHODS Whole-exome sequencing (WES) was performed on the proband. The variant was validated using Sanger sequencing in both proband and parents. Published HIST1H1E variants in neuropsychiatric disorders were reviewed. RESULTS Herein, we reported a new de novo frameshift mutation in HIST1H1E (NM_005321.2, c.416_419dupAGAA, p.Ala141GlufsTer56) in an individual with Rahman syndrome. To explore the genotype-phenotype correlations for HIST1H1E variants in neurodevelopmental disorders, we comprehensively curated and summarized 23 variants and the clinical features from 52 patients. Our findings revealed that likely gene-disrupting variants in HIST1H1E contribute to a wide range of neurodevelopmental phenotypes. We observed the common phenotypes including craniofacial features, ID, hypotonia, and autism/behavior problem in patients with HIST1H1E variants. While the different genotypes corresponding to different phenotypes or the same phenotype were also observed. CONCLUSION These data provide scientific evidence for the genetic diagnosis and precision clinical management.
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Affiliation(s)
- Wenjing Zhao
- Department of Medical Genetics, First People's Hospital of Yunnan ProvinceKunmingChina
- Affiliated Hospital of Kunming University of Science and TechnologyKunmingChina
- National Health CommissionKey Laboratory of Preconception Health Birth in Western ChinaKunmingChina
| | - Yinhong Zhang
- Department of Medical Genetics, First People's Hospital of Yunnan ProvinceKunmingChina
- Affiliated Hospital of Kunming University of Science and TechnologyKunmingChina
- National Health CommissionKey Laboratory of Preconception Health Birth in Western ChinaKunmingChina
| | - Tao Lv
- Department of Medical Genetics, First People's Hospital of Yunnan ProvinceKunmingChina
- Affiliated Hospital of Kunming University of Science and TechnologyKunmingChina
- National Health CommissionKey Laboratory of Preconception Health Birth in Western ChinaKunmingChina
| | - Jing He
- Department of Medical Genetics, First People's Hospital of Yunnan ProvinceKunmingChina
- Affiliated Hospital of Kunming University of Science and TechnologyKunmingChina
- National Health CommissionKey Laboratory of Preconception Health Birth in Western ChinaKunmingChina
| | - Baosheng Zhu
- Department of Medical Genetics, First People's Hospital of Yunnan ProvinceKunmingChina
- Affiliated Hospital of Kunming University of Science and TechnologyKunmingChina
- National Health CommissionKey Laboratory of Preconception Health Birth in Western ChinaKunmingChina
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19
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Wang Y, Wang L, Chen X, Liu S, Han W, Yu X, Cao X, Liu X, Wang J. Congenital central hypoventilation syndrome in Chinese population: Analysis of three new cases and review of the literature. Mol Genet Genomic Med 2023; 11:e2267. [PMID: 37712713 PMCID: PMC10724499 DOI: 10.1002/mgg3.2267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 06/26/2023] [Accepted: 07/19/2023] [Indexed: 09/16/2023] Open
Abstract
BACKGROUND Congenital central hypoventilation syndrome (CCHS) is a rare autosomal dominant disease that is mainly caused by PHOX2B mutations. The purpose of this study is to analyze and summarize the clinical and genetic characteristics of CCHS patients in the Chinese population from our study and previous literature. METHODS The potential pathogenic gene mutations of CCHS were identified and verified by next generation sequencing combined with Sanger sequencing, fluorescent probe PCR and capillary electrophoresis. The clinical characteristics and gene mutations of CCHS cases in Chinese population were summarized from our study and previous literature to explore the genotype-phenotype correlations. RESULTS We identified 48 CCHS cases including three new cases from our report in China. Overall, 77.1% of the patients had PHOX2B polyalanine repeat expansion mutations (PARMs), and the remaining 22.9% had 10 distinct PHOX2B non-polyalanine repeat expansion mutations (NPARMs). Compared to those with PARMs, patients with NPARMs were more likely to have premature birth (54.5% vs. 2.8%, p < 0.001) and lower birth weight (33.3% vs. 3.2%, p = 0.030), with statistical significance. The patients with PARMs were more likely to have cardiovascular defects (64.9% vs. 27.3%, p = 0.063), cerebral hemorrhage (29.7% vs. 9.1%, p = 0.322) and seizures (37.8% vs. 9.1%, p = 0.151) than those with NPARMs, with no statistical significance. CONCLUSIONS CCHS patients with PHOX2B NPARMs were more likely to have premature birth and low birth weight, while PHOX2B PARMs tended to be positively associated with the risk of cardiovascular defects, cerebral hemorrhage and seizures in Chinese population.
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Affiliation(s)
- Yaoyao Wang
- Department of Pulmonary and Critical Care Medicine, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
| | - Lina Wang
- Department of Respiratory Medicine, the Affiliated Hospital of Qingdao UniversityQingdao UniversityQingdaoShandongChina
| | - Xiaoying Chen
- Department of NICU, Qingdao Women and Children's HospitalQingdao UniversityQingdaoShandongChina
| | - Shiguo Liu
- Medical Genetic Departmentthe Affiliated Hospital of Qingdao UniversityQingdaoShandongChina
| | - Wei Han
- Department of Pulmonary and Critical Care Medicine, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
- Department of Clinical Research Center, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
| | - Xinjuan Yu
- Department of Pulmonary and Critical Care Medicine, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
- Department of Clinical Research Center, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
| | - Xipeng Cao
- Department of Neurology, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
| | - Xiuxiang Liu
- Department of NICU, Qingdao Women and Children's HospitalQingdao UniversityQingdaoShandongChina
| | - Jiahui Wang
- Department of Pulmonary and Critical Care Medicine, Qingdao Municipal HospitalQingdao UniversityQingdaoShandongChina
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20
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Neidhöfer C, Neuenhoff M, Jozič R, Atangcho B, Unsleber S, Neder U, Grumaz S, Parčina M. Exploring clonality and virulence gene associations in bloodstream infections using whole-genome sequencing and clinical data. Front Cell Infect Microbiol 2023; 13:1274573. [PMID: 38035332 PMCID: PMC10682671 DOI: 10.3389/fcimb.2023.1274573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/18/2023] [Indexed: 12/02/2023] Open
Abstract
Background Bloodstream infections (BSIs) remain a significant cause of mortality worldwide. Causative pathogens are routinely identified and susceptibility tested but only very rarely investigated for their resistance genes, virulence factors, and clonality. Our aim was to gain insight into the clonality patterns of different species causing BSI and the clinical relevance of distinct virulence genes. Methods For this study, we whole-genome-sequenced over 400 randomly selected important pathogens isolated from blood cultures in our diagnostic department between 2016 and 2021. Genomic data on virulence factors, resistance genes, and clonality were cross-linked with in-vitro data and demographic and clinical information. Results The investigation yielded extensive and informative data on the distribution of genes implicated in BSI as well as on the clonality of isolates across various species. Conclusion Associations between survival outcomes and the presence of specific genes must be interpreted with caution, and conducting replication studies with larger sample sizes for each species appears mandatory. Likewise, a deeper knowledge of virulence and host factors will aid in the interpretation of results and might lead to more targeted therapeutic and preventive measures. Monitoring transmission dynamics more efficiently holds promise to serve as a valuable tool in preventing in particular BSI caused by nosocomial pathogens.
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Affiliation(s)
- Claudio Neidhöfer
- Institute of Medical Microbiology, Immunology and Parasitology. University Hospital Bonn, Bonn, Germany
- Institute of Experimental Haematology and Transfusion Medicine, University of Bonn, Bonn, Germany
| | - Marcel Neuenhoff
- Bioinformatics and Systems Biology, Justus Liebig University Giessen, Giessen, Germany
| | - Robert Jozič
- Institute of Medical Microbiology, Immunology and Parasitology. University Hospital Bonn, Bonn, Germany
| | - Brenda Atangcho
- Institute of Medical Microbiology, Immunology and Parasitology. University Hospital Bonn, Bonn, Germany
- Institute for Functional Gene Analytics, Bonn-Rhein-Sieg University of Applied Sciences, Sankt Augustin, Germany
| | | | | | | | - Marijo Parčina
- Institute of Medical Microbiology, Immunology and Parasitology. University Hospital Bonn, Bonn, Germany
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21
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Ramanan R, McFadyen JD, Perkins AC, Tran HA. Congenital fibrinogen disorders: Strengthening genotype-phenotype correlations through novel genetic diagnostic tools. Br J Haematol 2023; 203:355-368. [PMID: 37583269 DOI: 10.1111/bjh.19039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 08/17/2023]
Abstract
Congenital fibrinogen disorders or CFDs are heterogenous, both in clinical manifestation and array of culprit molecular lesions. Correlations between phenotype and genotype remain poorly defined. This review examines the genetic landscape discovered to date for this rare condition. The question of a possible oligogenic model of inheritance influencing phenotypic heterogeneity is raised, with discussion of the benefits and challenges of sequencing technology used to enhance discovery in this space. Considerable work lies ahead in order to achieve diagnostic and prognostic precision and subsequently provide targeted management to this complex cohort of patients.
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Affiliation(s)
- Radha Ramanan
- Department of Haematology, Alfred Hospital, Melbourne, Victoria, Australia
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
- Department of Pathology, Alfred Hospital, Melbourne, Victoria, Australia
| | - James D McFadyen
- Department of Haematology, Alfred Hospital, Melbourne, Victoria, Australia
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
- Atherothrombosis and Vascular Biology Program, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Andrew C Perkins
- Department of Haematology, Alfred Hospital, Melbourne, Victoria, Australia
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
- Department of Pathology, Alfred Hospital, Melbourne, Victoria, Australia
| | - Huyen A Tran
- Department of Haematology, Alfred Hospital, Melbourne, Victoria, Australia
- Australian Centre for Blood Diseases, Monash University, Melbourne, Victoria, Australia
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22
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Smith MS, Sarasua SM, Rogers C, Phelan K, Boccuto L. Lymphedema is associated with CELSR1 in Phelan-McDermid syndrome. Clin Genet 2023; 104:472-478. [PMID: 37232218 DOI: 10.1111/cge.14364] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023]
Abstract
Lymphedema is a troubling condition present in many disorders including the rare genetic disorder known as Phelan-McDermid syndrome (PMS). The neurobehavioral features of PMS, also known as 22q13.3 deletion syndrome, have been investigated, but little research exists on lymphedema in PMS. In this investigation, clinical and genetic data from 404 people with PMS were reviewed from the PMS-International Registry revealing a prevalence of 5% with lymphedema. Lymphedema was reported in 1 out of 47 people (2.1%) with PMS due to a SHANK3 variant and 19 out of 357 people (5.3%) with PMS due to 22q13.3 deletions. Lymphedema was more common among those in their teens or adulthood (p = 0.0011) and those with deletions >4 Mb. People with lymphedema had significantly larger deletions (mean 5.375 Mb) than those without lymphedema (mean 3.464 Mb, p = 0.00496). Association analysis identified a deletion of the CELSR1 gene to be the biggest risk factor (OR = 12.9 95% CI [2.9-56.2]). Detailed assessment of 5 subjects identified all had deletions of CELSR1, developed symptoms of lymphedema starting at age 8 or older, and typically responded well to standard therapy. In conclusion, this is the largest assessment of lymphedema in PMS to date and our results suggest that individuals with deletions >4 Mb or those with CELSR1 deletions should be assessed for lymphedema.
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Affiliation(s)
- Marie S Smith
- School of Nursing, Healthcare Genetics Program, Clemson University, Clemson, South Carolina, USA
| | - Sara M Sarasua
- School of Nursing, Healthcare Genetics Program, Clemson University, Clemson, South Carolina, USA
| | - Curtis Rogers
- Greenwood Genetic Center, Greenwood, South Carolina, USA
| | - Katy Phelan
- Genetics Laboratory, Florida Cancer Specialists & Research Institute, Fort Myers, Florida, USA
| | - Luigi Boccuto
- School of Nursing, Healthcare Genetics Program, Clemson University, Clemson, South Carolina, USA
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23
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Kaufmann L, Pilic J, Auinger L, Mayer AL, Blatterer J, Semmler-Bruckner J, Abbas S, Rehman K, Ayaz M, Graier WF, Malli R, Petek E, Wagner K, Al Kaissi A, Khan MA, Windpassinger C. Analysis of a non-lethal biallelic frameshift mutation in ZMPSTE24 reveals utilization of alternative translation initiation codons. Clin Genet 2023; 104:491-496. [PMID: 37270786 DOI: 10.1111/cge.14381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/12/2023] [Accepted: 05/23/2023] [Indexed: 06/06/2023]
Abstract
Restrictive dermopathy (RD) is a lethal condition caused by biallelic loss-of-function mutations in ZMPSTE24, whereas mutations preserving residual enzymatic activity of the ZMPSTE24 protein lead to the milder mandibuloacral dysplasia with type B lipodystrophy (MADB) phenotype. Remarkably, we identified a homozygous, presumably loss-of-function mutation in ZMPSTE24 [c.28_29insA, p.(Leu10Tyrfs*37)] in two consanguineous Pakistani families segregating MADB. To clarify how lethal consequences are prevented in affected individuals, functional analysis was performed. Expression experiments supported utilization of two alternative translation initiation sites, preventing complete loss of protein function consistent with the relatively mild phenotypic outcome in affected patients. One of these alternative start codons is newly formed at the insertion site. Our findings indicate that the creation of new potential start codons through N-terminal mutations in other disease-associated genes should generally be taken into consideration in the variant interpretation process.
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Affiliation(s)
- Lukas Kaufmann
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Johannes Pilic
- Gottfried Schatz Research Center, Department of Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
| | - Lisa Auinger
- Division of Haematology, Medical University of Graz, Graz, Austria
| | - Anna-Lena Mayer
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Jasmin Blatterer
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Johann Semmler-Bruckner
- Neurogenetics Laboratory, Department of Neurology, Medical University of Graz, Graz, Austria
| | - Safdar Abbas
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, Dera Ismail Khan, Pakistan
| | - Khurram Rehman
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gomal University, Dera Ismail Khan, Pakistan
| | - Muhammad Ayaz
- Department of Biological Sciences, Gomal University, Dera Ismail Khan, Pakistan
| | - Wolfgang F Graier
- Gottfried Schatz Research Center, Department of Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
| | - Roland Malli
- Gottfried Schatz Research Center, Department of Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
| | - Erwin Petek
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Klaus Wagner
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Ali Al Kaissi
- Pediatric Orthopedic Department, Speising Hospital, Vienna, Austria
| | - Muzammil Ahmad Khan
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, Dera Ismail Khan, Pakistan
| | - Christian Windpassinger
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz, Austria
- Neurogenetics Laboratory, Department of Neurology, Medical University of Graz, Graz, Austria
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24
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Chung DH, Zheng M, Bale AE, Vilarinho S. Hepatology Genome Rounds: An interdisciplinary approach to integrate genomic data into clinical practice. J Hepatol 2023; 79:1065-1071. [PMID: 37011712 PMCID: PMC10523901 DOI: 10.1016/j.jhep.2023.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/13/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023]
Abstract
In the last decade, the utility of whole-exome sequencing in uncovering genetic aetiologies of a variety of liver diseases has been demonstrated. These new diagnoses have guided the management, treatment, and prognostication of previously undiagnosed patients, largely thanks to improved insight into the underlying pathogenesis of their conditions. Despite its clear benefits, the uptake of genetic testing by hepatologists has been limited, in part due to limited prior genetic training and/or opportunities for continuing education. Herein, we show that Hepatology Genome Rounds, an interdisciplinary forum highlighting hepatology cases of clinical interest and educational value, are an important venue for integrating genotypic and phenotypic information to enable accurate diagnosis and appropriate management, dissemination of genomic knowledge within the field of hepatology, and ongoing education to providers and trainees in genomic medicine. We describe our single-centre experience and discuss practical considerations for clinicians interested in launching such a series. We foresee that this format will be adopted at other institutions and by additional specialties, with the aim of further incorporating genomic information into clinical medicine.
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Affiliation(s)
- David H Chung
- Department of Internal Medicine, Section of Digestive Diseases, Yale School of Medicine, New Haven, CT, USA
| | - Melanie Zheng
- Department of Internal Medicine, Section of Digestive Diseases, Yale School of Medicine, New Haven, CT, USA
| | - Allen E Bale
- Department of Genetics, Yale School of Medicine, New Haven, CT, USA
| | - Sílvia Vilarinho
- Department of Internal Medicine, Section of Digestive Diseases, Yale School of Medicine, New Haven, CT, USA; Department of Pathology, Yale School of Medicine, New Haven, CT, USA.
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25
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Vendra VPR, Ostrowski C, Dyba MA, Tarasov SG, Hejtmancik JF. Human γS-Crystallin Mutation F10_Y11delinsLN in the First Greek Key Pair Destabilizes and Impairs Tight Packing Causing Cortical Lamellar Cataract. Int J Mol Sci 2023; 24:14332. [PMID: 37762633 PMCID: PMC10531703 DOI: 10.3390/ijms241814332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/15/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Aromatic residues forming tyrosine corners within Greek key motifs are critical for the folding, stability, and order of βγ-crystallins and thus lens transparency. To delineate how a double amino acid substitution in an N-terminal-domain tyrosine corner of the CRYGS mutant p.F10_Y11delinsLN causes juvenile autosomal dominant cortical lamellar cataracts, human γS-crystallin c-DNA was cloned into pET-20b (+) and a p.F10_Y11delinsLN mutant was generated via site-directed mutagenesis, overexpressed, and purified using ion-exchange and size-exclusion chromatography. Structure, stability, and aggregation properties in solution under thermal and chemical stress were determined using spectrofluorimetry and circular dichroism. In benign conditions, the p.F10_Y11delinsLN mutation does not affect the protein backbone but alters its tryptophan microenvironment slightly. The mutant is less stable to thermal and GuHCl-induced stress, undergoing a two-state transition with a midpoint of 60.4 °C (wild type 73.1 °C) under thermal stress and exhibiting a three-state transition with midpoints of 1.25 and 2.59 M GuHCl (wild type: two-state transition with Cm = 2.72 M GuHCl). The mutant self-aggregates upon heating at 60 °C, which is inhibited by α-crystallin and reducing agents. Thus, the F10_Y11delinsLN mutation in human γS-crystallin impairs the protein's tryptophan microenvironment, weakening its stability under thermal and chemical stress, resulting in self-aggregation, lens opacification, and cataract.
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Affiliation(s)
- Venkata Pulla Rao Vendra
- Ophthalmic Molecular Genetics Section, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA; (V.P.R.V.)
| | - Christian Ostrowski
- Ophthalmic Molecular Genetics Section, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA; (V.P.R.V.)
| | - Marzena A. Dyba
- Biophysics Resource in the Center for Structural Biology, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (M.A.D.); (S.G.T.)
| | - Sergey G. Tarasov
- Biophysics Resource in the Center for Structural Biology, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (M.A.D.); (S.G.T.)
| | - J. Fielding Hejtmancik
- Ophthalmic Molecular Genetics Section, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA; (V.P.R.V.)
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26
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Risemberg EL, Smeekens JM, Cisneros MCC, Hampton BK, Hock P, Linnertz CL, Miller DR, Orgel K, Shaw GD, de Villena FPM, Burks AW, Valdar W, Kulis MD, Ferris MT. A mutation in Themis contributes to peanut-induced oral anaphylaxis in CC027 mice. bioRxiv 2023:2023.09.13.557467. [PMID: 37745496 PMCID: PMC10515941 DOI: 10.1101/2023.09.13.557467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Background The development of peanut allergy is due to a combination of genetic and environmental factors, although specific genes have proven difficult to identify. Previously, we reported that peanut-sensitized CC027/GeniUnc (CC027) mice develop anaphylaxis upon oral challenge to peanut, unlike C3H/HeJ (C3H) mice. Objective To determine the genetic basis of orally-induced anaphylaxis to peanut in CC027 mice. Methods A genetic mapping population between CC027 and C3H mice was designed to identify the genetic factors that drive oral anaphylaxis. A total of 356 CC027xC3H backcrossed mice were generated, sensitized to peanut, then challenged to peanut by oral gavage. Anaphylaxis and peanut-specific IgE were quantified for all mice. T-cell phenotyping was conducted on CC027 and five additional CC strains. Results Anaphylaxis to peanut was absent in 77% of backcrossed mice, with 19% showing moderate anaphylaxis, and 4% having severe anaphylaxis. A total of eight genetic loci were associated with variation in response to peanut challenge, six associated with anaphylaxis (temperature decrease) and two associated with peanut-specific IgE levels. There were two major loci that impacted multiple aspects of the severity of acute anaphylaxis, at which the CC027 allele was associated with worse outcome. At one of these loci, CC027 has a private genetic variant in the Themis (thymocyte-expressed molecule involved in selection) gene. Consistent with Themis' described functions, we found that CC027 have more immature T cells with fewer CD8+, CD4+, and CD4+CD25+CD127- regulatory T cells. Conclusion Our results demonstrate a key role for Themis in the orally-reactive CC027 mouse model of peanut allergy.
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Affiliation(s)
- Ellen L. Risemberg
- Curriculum in Bioinformatics and Computational Biology, UNC Chapel Hill
- Department of Genetics, UNC Chapel Hill
| | - Johanna M. Smeekens
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - Marta C. Cruz Cisneros
- Department of Genetics, UNC Chapel Hill
- Curriculum in Genetics and Molecular Biology, UNC Chapel Hill
| | - Brea K. Hampton
- Department of Genetics, UNC Chapel Hill
- Curriculum in Genetics and Molecular Biology, UNC Chapel Hill
| | | | | | | | - Kelly Orgel
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - Ginger D. Shaw
- Department of Genetics, UNC Chapel Hill
- Lineberger Comprehensive Cancer Center, UNC Chapel Hill
| | | | - A. Wesley Burks
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
| | - William Valdar
- Department of Genetics, UNC Chapel Hill
- Lineberger Comprehensive Cancer Center, UNC Chapel Hill
| | - Michael D. Kulis
- Department of Pediatrics, Division of Allergy and Immunology, UNC Chapel Hill
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27
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Lee S, Ahn H, Kim H, Lee K, Kim S, Lee JH. Identification of potential key variants in mandibular premolar hypodontia through whole-exome sequencing. Front Genet 2023; 14:1248326. [PMID: 37745851 PMCID: PMC10514915 DOI: 10.3389/fgene.2023.1248326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 08/29/2023] [Indexed: 09/26/2023] Open
Abstract
Determining genotype-phenotype correlations in patients with hypodontia is important for understanding disease pathogenesis, although only a few studies have elucidated it. We aimed to identify genetic variants linked to non-syndromic bilateral mandibular second premolar hypodontia in a Korean population for the first time by specifying the phenotype of hypodontia. Twenty unrelated individuals with non-syndromic bilateral mandibular second premolar hypodontia were enrolled for whole-exome sequencing. Using a tooth agenesis gene set panel consisting of 112 genes based on literature, potential candidate variants were screened through variant filtering and prioritization. We identified 13 candidate variants in 12 genes, including a stop-gain variant (c.4750C>T) in LAMA3. Through the functional enrichment analysis of the prioritized genes, several terms related to tooth development were enriched in a protein-protein interaction network of candidate genes for mandibular premolar hypodontia. The hypodontia group also had approximately 2-fold as many mutated variants in all four genes related to these key terms, which are CDH1, ITGB4, LAMA3, LAMB3, as those in the 100 healthy control group individuals. The relationship between enriched terms and pathways and mandibular premolar hypodontia was also investigated. In addition, we identified some known oligodontia variants in patients with hypodontia, strengthening the possibility of synergistic effects in other genes. This genetic investigation may be a worthwhile preliminary attempt to reveal the pathogenesis of tooth agenesis and sets a background for future studies.
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Affiliation(s)
- Shinyeop Lee
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Hyunsoo Ahn
- Graduate School of Artificial Intelligence, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Hyeonhye Kim
- Tufts University School of Medicine, Boston, MA, United States
| | - Kwanghwan Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Sanguk Kim
- Graduate School of Artificial Intelligence, Pohang University of Science and Technology, Pohang, Republic of Korea
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Jae Hoon Lee
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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28
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Suzuki R, Sakakibara N, Ichikawa Y, Kitakado H, Ueda C, Tanaka Y, Okada E, Kondo A, Ishiko S, Ishimori S, Nagano C, Yamamura T, Horinouchi T, Okamoto T, Nozu K. Systematic Review of Clinical Characteristics and Genotype-Phenotype Correlation in LAMB2-Associated Disease. Kidney Int Rep 2023; 8:1811-1821. [PMID: 37705905 PMCID: PMC10496080 DOI: 10.1016/j.ekir.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 05/21/2023] [Accepted: 06/21/2023] [Indexed: 09/15/2023] Open
Abstract
Introduction Laminin subunit beta-2 (LAMB2)-associated disease, termed Pierson syndrome, presents with congenital nephrotic syndrome, ocular symptoms, and neuromuscular symptoms. In recent years, however, the widespread use of next-generation sequencing (NGS) has helped to discover a variety of phenotypes associated with this disease. Therefore, we conducted this systematic review. Methods A literature search of patients with LAMB2 variants was conducted, and 110 patients were investigated, including 12 of our patients. For genotype-phenotype correlation analyses, the extracted data were investigated for pathogenic variant types, the severity of nephropathy, and extrarenal symptoms. Survival analyses were also performed for the onset age of end-stage kidney disease (ESKD). Results Among all patients, 81 (78%) presented with congenital nephrotic syndrome, and 52 (55%) developed ESKD within 12 months. The median age at ESKD onset was 6.0 months. Kidney survival analysis showed that patients with biallelic truncating variants had a significantly earlier progression to ESKD than those with other variants (median age 1.2 months vs. 60.0 months, P < 0.05). Although the laminin N-terminal domain is functionally important in laminin proteins, and variants in the laminin N-terminal domain are said to result in a severe kidney phenotype such as earlier onset age and worse prognosis, there were no significant differences in onset age of nephropathy and progression to ESKD between patients with nontruncating variants located in the laminin N-terminal domain and those with variants located outside this domain. Conclusion This study revealed a diversity of LAMB2-associated diseases, characteristics of LAMB2 nephropathy, and genotype-phenotype correlations.
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Affiliation(s)
- Ryota Suzuki
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
- Department of Pediatrics, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Nana Sakakibara
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yuta Ichikawa
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hideaki Kitakado
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Chika Ueda
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu Tanaka
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Eri Okada
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsushi Kondo
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shinya Ishiko
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shingo Ishimori
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - China Nagano
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomohiko Yamamura
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomoko Horinouchi
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takayuki Okamoto
- Department of Pediatrics, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Kandai Nozu
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
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Lee J, Yoo J, Lee S, Lee JW, Park EG. PPP2R1A-Related Neurodevelopmental Disorder: The First Korean Case with a Novel Variant of PPP2R1A and Literature Review. Ann Clin Lab Sci 2023; 53:792-799. [PMID: 37945024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
In 2015, germline mutations in PPP2R1A were found to cause neurodevelopmental disorders (NDDs). To date, fewer than 50 cases of PPP2R1A-related NDDs have been reported. Here, we report the first Korean case of PPP2R1A-related NDD harboring a novel de novo missense PPP2R1A variant with previously unreported clinical features. The proband, a 12-month-old female, presented with developmental delay, intractable epilepsy, microcephaly, and feeding difficulties. Brain magnetic resonance imaging showed a Dandy-Walker continuum with corpus callosum hypoplasia, periventricular leukomalacia, and brainstem and diffuse cerebral atrophy. Next-generation sequencing-based targeted gene panel testing for NDDs revealed a novel heterozygous missense variant of PPP2R1A:c.650A>G, p.(Gln217Arg). Sanger sequencing confirmed it as de novo, as neither parent carried this variant. These findings expand the phenotypic and genotypic spectra of PPP2R1A variants.
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Affiliation(s)
| | - Jaeeun Yoo
- Department of Laboratory Medicine, Seoul, Korea
| | - Seungok Lee
- Department of Laboratory Medicine, Seoul, Korea
| | | | - Eu Gene Park
- Department of Pediatrics, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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30
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Erratum: Functional and clinical analysis of five EDA variants associated with ectodermal dysplasia but with a hard-to-predict significance. Front Genet 2023; 14:1281631. [PMID: 37719709 PMCID: PMC10501860 DOI: 10.3389/fgene.2023.1281631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 09/19/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fgene.2022.934395.].
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31
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Cucinotta F, Lintas C, Tomaiuolo P, Baccarin M, Picinelli C, Castronovo P, Sacco R, Piras IS, Turriziani L, Ricciardello A, Scattoni ML, Persico AM. Diagnostic yield and clinical impact of chromosomal microarray analysis in autism spectrum disorder. Mol Genet Genomic Med 2023; 11:e2182. [PMID: 37186221 PMCID: PMC10422062 DOI: 10.1002/mgg3.2182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND Autism spectrum disorder (ASD) is characterized by high heritability estimates and recurrence rates; its genetic underpinnings are very heterogeneous and include variable combinations of common and rare variants. Array-comparative genomic hybridization (aCGH) offers significant sensitivity for the identification of copy number variants (CNVs), which can act as susceptibility or causal factors for ASD. METHODS The aim of this study was to evaluate both diagnostic yield and clinical impact of aCGH in 329 ASD patients of Italian descent. RESULTS Pathogenic/likely pathogenic CNVs were identified in 50/329 (15.2%) patients, whereas 89/329 (27.1%) carry variants of uncertain significance. The 10 most enriched gene sets identified by Gene Ontology Enrichment Analysis are primarily involved in neuronal function and synaptic connectivity. In 13/50 (26.0%) patients with pathogenic/likely pathogenic CNVs, the outcome of array-CGH led to the request of 25 additional medical exams which would not have otherwise been prescribed, mainly including brain MRI, EEG, EKG, and/or cardiac ultrasound. A positive outcome was obtained in 12/25 (48.0%) of these additional tests. CONCLUSIONS This study confirms the satisfactory diagnostic yield of aCGH, underscoring its potential for better, more in-depth care of children with autism when genetic results are analyzed also with a focus on patient management.
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Affiliation(s)
- Francesca Cucinotta
- Interdepartmental Program "Autism 0‐90", "G. Martino" University Hospital of MessinaMessinaItaly
- IRCCS Centro Neurolesi “Bonino Pulejo”MessinaItaly
| | - Carla Lintas
- Service for Neurodevelopmental Disorders & Laboratory of Molecular Psychiatry and NeurogeneticsUniversity “Campus Bio‐Medico”RomeItaly
| | - Pasquale Tomaiuolo
- Interdepartmental Program "Autism 0‐90", "G. Martino" University Hospital of MessinaMessinaItaly
| | - Marco Baccarin
- Mafalda Luce Center for Pervasive Developmental DisordersMilanItaly
- Synlab GeneticsBioggioSwitzerland
| | - Chiara Picinelli
- Mafalda Luce Center for Pervasive Developmental DisordersMilanItaly
| | - Paola Castronovo
- Mafalda Luce Center for Pervasive Developmental DisordersMilanItaly
| | - Roberto Sacco
- Service for Neurodevelopmental Disorders & Laboratory of Molecular Psychiatry and NeurogeneticsUniversity “Campus Bio‐Medico”RomeItaly
| | - Ignazio Stefano Piras
- Service for Neurodevelopmental Disorders & Laboratory of Molecular Psychiatry and NeurogeneticsUniversity “Campus Bio‐Medico”RomeItaly
- Neurogenomics DivisionThe Translational Genomics Research InstitutePhoenixArizonaUSA
| | - Laura Turriziani
- Interdepartmental Program "Autism 0‐90", "G. Martino" University Hospital of MessinaMessinaItaly
| | - Arianna Ricciardello
- Interdepartmental Program "Autism 0‐90", "G. Martino" University Hospital of MessinaMessinaItaly
| | | | - Antonio M. Persico
- Child and Adolescent Neuropsychiatry Program, Modena University Hospital & Department of Biomedical, Metabolic and Neural SciencesUniversity of Modena and Reggio EmiliaModenaItaly
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Shalata A, Bar-Shai M, Hadid Y, Mahroum M, Mintz H, Shalata ZE, Radzishevsky E, Genizi J, Lorber A, Ben-Yosef T, Yaniv L. Danon Disease: Entire LAMP2 Gene Deletion with Unusual Clinical Presentation-Case Report and Review of the Literature. Genes (Basel) 2023; 14:1539. [PMID: 37628591 PMCID: PMC10454823 DOI: 10.3390/genes14081539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/17/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
Danon disease is a rare x-linked dominant multisystemic disorder with a clinical triad of severe cardiomyopathy, skeletal myopathy, and intellectual disability. It is caused by defects in the lysosome-associated membrane protein-2 (LAMP2) gene. Numerous different mutations in the LAMP2 protein have been described. Danon disease is typically lethal by the mid-twenties in male patients due to cardiomyopathy and heart failure. Female patients usually present with milder and variable symptoms. This report describes a 42-year-old father and his 3-year-old daughter presenting with mild manifestations of the disease. The father has normal intellectual development and normal physical activity. At the age of 13, he was diagnosed with mild ventricular pre-excitation known as Wolf-Parkinson-White syndrome (WPWs), very mild and mostly asymptomatic cardiomyopathy and left ventricular hypertrophy, and at about the age of 25 presented with visual impairment due to cone-rod dystrophy. His daughter showed normal development and very mild asymptomatic electrocardiographic WPWs abnormalities with left mild ventricular hypertrophy. Genetic testing revealed an Xq24 microdeletion encompassing the entire LAMP2 gene. Relevant literature was reviewed as a reference for the etiology, diagnosis, treatment and case management.
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Affiliation(s)
- Adel Shalata
- The Simon Winter Institute for Human Genetics, Bnai Zion Medical Center, Haifa 32000, Israel; (Y.H.); (M.M.); (H.M.)
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
| | - Marina Bar-Shai
- The Institute of Medical Genetics, Carmel Medical Center, Haifa 34362, Israel;
| | - Yarin Hadid
- The Simon Winter Institute for Human Genetics, Bnai Zion Medical Center, Haifa 32000, Israel; (Y.H.); (M.M.); (H.M.)
| | - Muhammad Mahroum
- The Simon Winter Institute for Human Genetics, Bnai Zion Medical Center, Haifa 32000, Israel; (Y.H.); (M.M.); (H.M.)
| | - Hila Mintz
- The Simon Winter Institute for Human Genetics, Bnai Zion Medical Center, Haifa 32000, Israel; (Y.H.); (M.M.); (H.M.)
| | | | - Evgeny Radzishevsky
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
- Cardiology Department, Bnai Zion Medical Center, Haifa 32000, Israel
| | - Jacob Genizi
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
- Department of Pediatric, Bnai Zion Medical Center, Haifa 32000, Israel
| | - Avraham Lorber
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
- Pediatric Cardiology Unit, Rambam Medical Centre, Haifa 31096, Israel
| | - Tamar Ben-Yosef
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
| | - Liat Yaniv
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 32000, Israel; (E.R.); (J.G.); (A.L.); (T.B.-Y.); (L.Y.)
- Department of Pediatric, Bnai Zion Medical Center, Haifa 32000, Israel
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Martinelli I, Zucchi E, Simonini C, Gianferrari G, Zamboni G, Pinti M, Mandrioli J. The landscape of cognitive impairment in superoxide dismutase 1-amyotrophic lateral sclerosis. Neural Regen Res 2023; 18:1427-1433. [PMID: 36571338 PMCID: PMC10075107 DOI: 10.4103/1673-5374.361535] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Although mutations in the superoxide dismutase 1 gene account for only a minority of total amyotrophic lateral sclerosis cases, the discovery of this gene has been crucial for amyotrophic lateral sclerosis research. Since the identification of superoxide dismutase 1 in 1993, the field of amyotrophic lateral sclerosis genetics has considerably widened, improving our understanding of the diverse pathogenic basis of amyotrophic lateral sclerosis. In this review, we focus on cognitive impairment in superoxide dismutase 1-amyotrophic lateral sclerosis patients. Literature has mostly reported that cognition remains intact in superoxide dismutase 1-amyotrophic lateral sclerosis patients, but recent reports highlight frontal lobe function frailty in patients carrying different superoxide dismutase 1-amyotrophic lateral sclerosis mutations. We thoroughly reviewed all the various mutations reported in the literature to contribute to a comprehensive database of superoxide dismutase 1-amyotrophic lateral sclerosis genotype-phenotype correlation. Such a resource could ultimately improve our mechanistic understanding of amyotrophic lateral sclerosis, enabling a more robust assessment of how the amyotrophic lateral sclerosis phenotype responds to different variants across genes, which is important for the therapeutic strategy targeting genetic mutations. Cognition in superoxide dismutase 1-amyotrophic lateral sclerosis deserves further longitudinal research since this peculiar frailty in patients with similar mutations can be conditioned by external factors, including environment and other unidentified agents including modifier genes.
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Affiliation(s)
- Ilaria Martinelli
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia; Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy
| | - Elisabetta Zucchi
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena; Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Cecilia Simonini
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy
| | - Giulia Gianferrari
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Giovanna Zamboni
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena; Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marcello Pinti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Jessica Mandrioli
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena; Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
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Kocabey M, Özkalaycı H, Çankaya T, Yılmaz Uzman C, Çağlayan AO, Ülgenalp A, Erçal MD. Genetic evaluation of 50 Turkish patients with neurofibromatosis type 1: 2 years experience of a single center. Int J Dev Neurosci 2023. [PMID: 37280783 DOI: 10.1002/jdn.10278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 05/03/2023] [Accepted: 05/14/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND/AIM Neurofibromatosis type 1 is an autosomal dominant neurocutaneous disorder. Clinical diagnosis is difficult in early childhood, and it is possible to miss a critical interval for tumour screening. In this study, we aimed to characterize the mutational spectrum of Turkish patients and discuss the benefits of molecular testing. MATERIAL AND METHODS Fifty individuals from 35 unrelated families were included. Main referral reasons for genetic testing were as follows: to confirm a clinical diagnosis, to use in differential diagnosis and to evaluate first-degree family member of a known patient. Two-step process consisting of initial next generation sequencing of the NF1 gene and consequent multiplex ligation-dependent probe amplification were performed. RESULTS We identified a total of 30 variants in 28 individuals. Variant detection rate was 56% in the entire study group and 71.4% within the index patients. Four novel variants were found. Truncating variants constituted 60% of the entire mutation spectrum. A deletion or duplication was not detected. The most common feature was cafe au lait macules in 70% of the patients, followed by focal areas of signal intensity on brain imaging (26%), cutaneous neurofibromas (24%) and axillary freckling (24%). CONCLUSIONS Early sequencing in all suspected patients followed by deletion/duplication analysis in patients meeting clinical criteria and a case-to-case based consideration for RNA studies seems to be the effective algorithm for NF-1 diagnosis.
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Affiliation(s)
- Mehmet Kocabey
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Hande Özkalaycı
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Tufan Çankaya
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Ceren Yılmaz Uzman
- Department of Pediatric Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Ahmet Okay Çağlayan
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Ayfer Ülgenalp
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Murat Derya Erçal
- Department of Pediatric Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
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Li X, Xing X, Liang X, Song C, Yang J, Ren D, Zhou Y. Piebaldism with café-au-lait macules resulting from a novel mutation of KIT gene in a three-generation Chinese family. Skin Res Technol 2023; 29:e13352. [PMID: 37357653 PMCID: PMC10209842 DOI: 10.1111/srt.13352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/04/2023] [Indexed: 06/27/2023]
Abstract
BACKGROUND Piebaldism is a rare, autosomal dominant, and congenital pigmentary disorder characterized by stable depigmentation of the skin and white forelock. Mutations in KIT or SLUG genes result in piebaldism. Most individuals with piebaldism have a family history of the disorder. METHODS In this paper, we report a case of piebaldism with café-au-lait macules resulting from a novel mutation of KIT gene c.1982C > T (p.Thr661Ile) in a three-generation Chinese family. The whole-exome sequencing, mitochondrial gene 3000X, and bioinformatics tools were used to identify the mutation in this new-found pedigree. In addition, we searched the databases of "Punmed, Chinese National Knowledge Infrastructure, CMJD, WANFANG MED ONLINE", reviewed 88 cases of piebaldism caused by KIT gene mutation, and summarized the relationship between clinical phenotype and genotype of piebaldism through logistic regression and other statistical methods. RESULTS The proband and her affected mother carried a heterozygous c.1982C > T missense mutation (p.Thr661Ile) on KIT gene. Bioinformatics analysis hinted that it had potential pathogenicity. The data showed that piebaldism patients with cafè-au-lait macules had KIT mutations almost located in the intracellular tyrosine kinase domain and were mostly related to the severe clinical phenotype of piebaldism. CONCLUSION The new heterozygous c.1982C > T missense mutation on KIT caused piebaldism with café-au-lait macules in this Chinese family. This study provides a new reference index for clinicians to judge the severity of clinical phenotypes of piebaldism, broadens the understanding of the correlation between clinical phenotypes and genotypes of piebaldism, and provides reference of genetic counseling and prenatal diagnosis for affected families.
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Affiliation(s)
- Xiaorong Li
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Xiaojing Xing
- Department of DermatologyBeijing Shijitan HospitalCapital Medical UniversityBeijingChina
| | - Xiaoqiang Liang
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Cuihao Song
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Jie Yang
- Department of DermatologyAffiliated Hospital of North China University of Science and TechnologyTangshanChina
| | - Dan Ren
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Yong Zhou
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
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Zobor D, Brühwiler B, Zrenner E, Weisschuh N, Kohl S. Genetic and Clinical Profile of Retinopathies Due to Disease-Causing Variants in Leber Congenital Amaurosis (LCA)-Associated Genes in a Large German Cohort. Int J Mol Sci 2023; 24:ijms24108915. [PMID: 37240262 DOI: 10.3390/ijms24108915] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/06/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
To report the spectrum of Leber congenital amaurosis (LCA) associated genes in a large German cohort and to delineate their associated phenotype. Local databases were screened for patients with a clinical diagnosis of LCA and for patients with disease-causing variants in known LCA-associated genes independent of their clinical diagnosis. Patients with a mere clinical diagnosis were invited for genetic testing. Genomic DNA was either analyzed in a diagnostic-genetic or research setup using various capture panels for syndromic and non-syndromic IRD (inherited retinal dystrophy) genes. Clinical data was obtained mainly retrospectively. Patients with genetic and phenotypic information were eventually included. Descriptive statistical data analysis was performed. A total of 105 patients (53 female, 52 male, age 3-76 years at the time of data collection) with disease-causing variants in 16 LCA-associated genes were included. The genetic spectrum displayed variants in the following genes: CEP290 (21%), CRB1 (21%), RPE65 (14%), RDH12 (13%), AIPL1 (6%), TULP1 (6%), and IQCB1 (5%), and few cases harbored pathogenic variants in LRAT, CABP4, NMNAT1, RPGRIP1, SPATA7, CRX, IFT140, LCA5, and RD3 (altogether accounting for 14%). The most common clinical diagnosis was LCA (53%, 56/105) followed by retinitis pigmentosa (RP, 40%, 42/105), but also other IRDs were seen (cone-rod dystrophy, 5%; congenital stationary night blindness, 2%). Among LCA patients, 50% were caused by variants in CEP290 (29%) and RPE65 (21%), whereas variants in other genes were much less frequent (CRB1 11%, AIPL1 11%, IQCB1 9%, and RDH12 7%, and sporadically LRAT, NMNAT1, CRX, RD3, and RPGRIP1). In general, the patients showed a severe phenotype hallmarked by severely reduced visual acuity, concentric narrowing of the visual field, and extinguished electroretinograms. However, there were also exceptional cases with best corrected visual acuity as high as 0.8 (Snellen), well-preserved visual fields, and preserved photoreceptors in spectral domain optical coherence tomography. Phenotypic variability was seen between and within genetic subgroups. The study we are presenting pertains to a considerable LCA group, furnishing valuable comprehension of the genetic and phenotypic spectrum. This knowledge holds significance for impending gene therapeutic trials. In this German cohort, CEP290 and CRB1 are the most frequently mutated genes. However, LCA is genetically highly heterogeneous and exhibits clinical variability, showing overlap with other IRDs. For any therapeutic gene intervention, the disease-causing genotype is the primary criterion for treatment access, but the clinical diagnosis, state of the retina, number of to be treated target cells, and the time point of treatment will be crucial.
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Affiliation(s)
- Ditta Zobor
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Elfriede-Aulhorn Strasse 7, 72076 Tübingen, Germany
- Department of Ophthalmology, Semmelweis University, 1085 Budapest, Hungary
| | - Britta Brühwiler
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Elfriede-Aulhorn Strasse 7, 72076 Tübingen, Germany
| | - Eberhart Zrenner
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Elfriede-Aulhorn Strasse 7, 72076 Tübingen, Germany
- Werner Reichardt Center for Integrative Neuroscience, University of Tübingen, 72076 Tübingen, Germany
| | - Nicole Weisschuh
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Elfriede-Aulhorn Strasse 7, 72076 Tübingen, Germany
| | - Susanne Kohl
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Elfriede-Aulhorn Strasse 7, 72076 Tübingen, Germany
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Oliver KL, Trivisano M, Mandelstam SA, De Dominicis A, Francis DI, Green TE, Muir AM, Chowdhary A, Hertzberg C, Goldhahn K, Metreau J, Prager C, Pinner J, Cardamone M, Myers KA, Leventer RJ, Lesca G, Bahlo M, Hildebrand MS, Mefford HC, Kaindl AM, Specchio N, Scheffer IE. WWOX developmental and epileptic encephalopathy: Understanding the epileptology and the mortality risk. Epilepsia 2023; 64:1351-1367. [PMID: 36779245 PMCID: PMC10952634 DOI: 10.1111/epi.17542] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/14/2023]
Abstract
OBJECTIVE WWOX is an autosomal recessive cause of early infantile developmental and epileptic encephalopathy (WWOX-DEE), also known as WOREE (WWOX-related epileptic encephalopathy). We analyzed the epileptology and imaging features of WWOX-DEE, and investigated genotype-phenotype correlations, particularly with regard to survival. METHODS We studied 13 patients from 12 families with WWOX-DEE. Information regarding seizure semiology, comorbidities, facial dysmorphisms, and disease outcome were collected. Electroencephalographic (EEG) and brain magnetic resonance imaging (MRI) data were analyzed. Pathogenic WWOX variants from our cohort and the literature were coded as either null or missense, allowing individuals to be classified into one of three genotype classes: (1) null/null, (2) null/missense, (3) missense/missense. Differences in survival outcome were estimated using the Kaplan-Meier method. RESULTS All patients experienced multiple seizure types (median onset = 5 weeks, range = 1 day-10 months), the most frequent being focal (85%), epileptic spasms (77%), and tonic seizures (69%). Ictal EEG recordings in six of 13 patients showed tonic (n = 5), myoclonic (n = 2), epileptic spasms (n = 2), focal (n = 1), and migrating focal (n = 1) seizures. Interictal EEGs demonstrated slow background activity with multifocal discharges, predominantly over frontal or temporo-occipital regions. Eleven of 13 patients had a movement disorder, most frequently dystonia. Brain MRIs revealed severe frontotemporal, hippocampal, and optic atrophy, thin corpus callosum, and white matter signal abnormalities. Pathogenic variants were located throughout WWOX and comprised both missense and null changes including five copy number variants (four deletions, one duplication). Survival analyses showed that patients with two null variants are at higher mortality risk (p-value = .0085, log-rank test). SIGNIFICANCE Biallelic WWOX pathogenic variants cause an early infantile developmental and epileptic encephalopathy syndrome. The most common seizure types are focal seizures and epileptic spasms. Mortality risk is associated with mutation type; patients with biallelic null WWOX pathogenic variants have significantly lower survival probability compared to those carrying at least one presumed hypomorphic missense pathogenic variant.
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Affiliation(s)
- Karen L. Oliver
- Epilepsy Research Centre, Department of MedicineUniversity of Melbourne, Austin HealthHeidelbergVictoriaAustralia
- Population Health and Immunity DivisionWalter and Eliza Hall Institute of Medical ResearchParkvilleVictoriaAustralia
- Department of Medical BiologyUniversity of MelbourneMelbourneVictoriaAustralia
| | - Marina Trivisano
- Rare and Complex Epilepsy Unit, Department of NeuroscienceBambino Gesù Children's Hospital IRCCS, full member of European Reference Network EpiCARERomeItaly
| | - Simone A. Mandelstam
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Murdoch Children's Research InstituteMelbourneVictoriaAustralia
- Florey Institute of Neuroscience and Mental HealthMelbourneVictoriaAustralia
- Department of Radiology, Royal Children's HospitalMelbourneVictoriaAustralia
| | - Angela De Dominicis
- Rare and Complex Epilepsy Unit, Department of NeuroscienceBambino Gesù Children's Hospital IRCCS, full member of European Reference Network EpiCARERomeItaly
- Department of Biomedicine and PreventionUniversity of Rome “Tor Vergata”RomeItaly
| | - David I. Francis
- Victorian Clinical Genetics ServicesMurdoch Children's Research Institute, Royal Children's HospitalMelbourneVictoriaAustralia
| | - Timothy E. Green
- Epilepsy Research Centre, Department of MedicineUniversity of Melbourne, Austin HealthHeidelbergVictoriaAustralia
| | - Alison M. Muir
- Department of PediatricsUniversity of WashingtonSeattleWashingtonUSA
| | - Apoorva Chowdhary
- Department of PediatricsUniversity of WashingtonSeattleWashingtonUSA
| | - Christoph Hertzberg
- Zentrum für Sozialpädiatrie und Neuropädiatrie (DBZ)Vivantes Hospital NeukoellnBerlinGermany
| | - Klaus Goldhahn
- Department of Pediatrics and Neuropediatrics, DRK Klinikum WestendBerlinGermany
| | - Julia Metreau
- Department of Pediatric NeurologyHôpital Bicêtre, Assistance Publique Hopitaux de ParisLe Kremlin‐BicêtreFrance
| | - Christine Prager
- Center for Chronically Sick Children (SPZ)Charité‐Universitätsmedizin BerlinBerlinGermany
- Department of Pediatric NeurologyCharité–Universitätsmedizin BerlinBerlinGermany
| | - Jason Pinner
- Sydney Children's HospitalRandwickNew South WalesAustralia
- School of Women's and Children's HealthUniversity of New South WalesSydneyNew South WalesAustralia
| | - Michael Cardamone
- Sydney Children's HospitalRandwickNew South WalesAustralia
- School of Women's and Children's HealthUniversity of New South WalesSydneyNew South WalesAustralia
| | - Kenneth A. Myers
- Division of Child Neurology, Department of PediatricsMcGill UniversityMontrealQuebecCanada
- Research Institute of the McGill University Health CentreMontrealQuebecCanada
- Department of Neurology and NeurosurgeryMontreal Children's Hospital, McGill UniversityMontrealQuebecCanada
| | - Richard J. Leventer
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Murdoch Children's Research InstituteMelbourneVictoriaAustralia
- Department of NeurologyRoyal Children's HospitalMelbourneVictoriaAustralia
| | - Gaetan Lesca
- Department of Medical Genetics, Lyon University HospitalUniversité Claude Bernard Lyon 1, member of the European Reference Network EpiCARELyonFrance
| | - Melanie Bahlo
- Population Health and Immunity DivisionWalter and Eliza Hall Institute of Medical ResearchParkvilleVictoriaAustralia
- Department of Medical BiologyUniversity of MelbourneMelbourneVictoriaAustralia
| | - Michael S. Hildebrand
- Epilepsy Research Centre, Department of MedicineUniversity of Melbourne, Austin HealthHeidelbergVictoriaAustralia
- Murdoch Children's Research InstituteMelbourneVictoriaAustralia
| | - Heather C. Mefford
- Department of PediatricsUniversity of WashingtonSeattleWashingtonUSA
- Center for Pediatric Neurological Disease ResearchSt. Jude Children's Research HospitalMemphisTennesseeUSA
| | - Angela M. Kaindl
- Center for Chronically Sick Children (SPZ)Charité‐Universitätsmedizin BerlinBerlinGermany
- Department of Pediatric NeurologyCharité–Universitätsmedizin BerlinBerlinGermany
- Institute of Cell Biology and NeurobiologyCharité–Universitätsmedizin BerlinBerlinGermany
| | - Nicola Specchio
- Rare and Complex Epilepsy Unit, Department of NeuroscienceBambino Gesù Children's Hospital IRCCS, full member of European Reference Network EpiCARERomeItaly
| | - Ingrid E. Scheffer
- Epilepsy Research Centre, Department of MedicineUniversity of Melbourne, Austin HealthHeidelbergVictoriaAustralia
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Murdoch Children's Research InstituteMelbourneVictoriaAustralia
- Florey Institute of Neuroscience and Mental HealthMelbourneVictoriaAustralia
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Ozcelik F, Arslan S, Ozguc Caliskan B, Kardas F, Ozkul Y, Dundar M. PPM1K defects cause mild maple syrup urine disease: The second case in the literature. Am J Med Genet A 2023; 191:1360-1365. [PMID: 36706222 DOI: 10.1002/ajmg.a.63129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/29/2023]
Abstract
Maple syrup urine disease (MSUD) is an inborn error of metabolism caused by the insufficient catabolism of branched-chain amino acids. BCKDHA, BCKDHB, DBT, and DLD encode the subunits of the branched-chain α-ketoacid dehydrogenase complex, which is responsible for the catabolism of these amino acids. Biallelic pathogenic variants in BCKDHA, BCKDHB, or DBT are characteristic of MSUD. In addition, a patient with a PPM1K defect was previously reported. PPM1K dephosphorylates and activates the enzyme complex. We report a patient with MSUD with mild findings and elevated BCAA levels carrying a novel homozygous start-loss variant in PPM1K. Our study offers further evidence that PPM1K variants cause mild MSUD.
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Affiliation(s)
- Firat Ozcelik
- Department of Medical Genetics, Erciyes University, Kayseri, Turkey
| | - Sezai Arslan
- Division of Nutrition and Metabolism, Department of Pediatrics, Erciyes University, Kayseri, Turkey
| | | | - Fatih Kardas
- Division of Nutrition and Metabolism, Department of Pediatrics, Erciyes University, Kayseri, Turkey
| | - Yusuf Ozkul
- Department of Medical Genetics, Erciyes University, Kayseri, Turkey
| | - Munis Dundar
- Department of Medical Genetics, Erciyes University, Kayseri, Turkey
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Hampshire DJ. Factor VII deficiency: A cause of (or risk factor for) bleeding? Br J Haematol 2023. [PMID: 37042485 DOI: 10.1111/bjh.18806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 04/13/2023]
Abstract
Among the rare bleeding disorders factor VII deficiency is the most common, but correlating deficiency with bleeding phenotype is challenging. In their study Lou and colleagues investigate a large cohort of unrelated factor VII deficient patients providing a further perspective on the link between genotype and phenotype in this disorder. Commentary on: Lou et al. Structural and functional characterization of novel F7 mutations identified in Chinese factor VII deficient patients. Br J Haematol. 2023 (Online ahead of print). doi: 10.1111/bjh.18768.
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Affiliation(s)
- Daniel J Hampshire
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, UK
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40
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Chu KY, Wang YL, Chen JT, Lin CH, Yao CCJ, Chen YJ, Chen HW, Simmer JP, Hu JCC, Wang SK. PAX9 mutations and genetic synergism in familial tooth agenesis. Ann N Y Acad Sci 2023. [PMID: 37005710 DOI: 10.1111/nyas.14988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Familial tooth agenesis (FTA) is one of the most common craniofacial anomalies in humans. Loss-of-function mutations in PAX9 and WNT10A have been known to cause FTA with various expressivity. In this study, we identified five FTA kindreds with novel PAX9 disease-causing mutations: p.(Glu7Lys), p.(Val83Leu), p.(Pro118Ser), p.(Ser197Argfs*23), and c.771+4A>G. Concomitant PAX9 and WNT10A pathogenic variants found in two probands with severe phenotypes suggested an effect of mutational synergism. All overexpressed PAX9s showed proper nuclear localization, excepting the p.(Pro118Ser) mutant. Various missense mutations caused differential loss of PAX9 transcriptional ability. PAX9 overexpression in dental pulp cells upregulated LEF1 and AXIN2 expression, indicating a positive regulatory role for PAX9 in canonical Wnt signaling. Analyzing 176 cases with 63 different mutations, we observed a distinct pattern of tooth agenesis for PAX9-associated FTA: Maxillary teeth are in general more frequently affected than mandibular ones. Along with all second molars, maxillary bicuspids and first molars are mostly involved, while maxillary lateral incisors and mandibular bicuspids are relatively less affected. Genotypically, missense mutations are associated with fewer missing teeth than frameshift and nonsense variants. This study significantly expands the phenotypic and genotypic spectrums of PAX9-associated disorders and reveals a molecular mechanism of genetic synergism underlying FTA variable expressivity.
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Affiliation(s)
- Kuan-Yu Chu
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei City, Taiwan
| | - Yin-Lin Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei City, Taiwan
| | - Jung-Tsu Chen
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
| | - Chia-Hui Lin
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
| | - Chung-Chen Jane Yao
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
| | - Yi-Jane Chen
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
| | - Huan-Wen Chen
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei City, Taiwan
| | - James P Simmer
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Jan C-C Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Shih-Kai Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei City, Taiwan
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Zhong L, Gao X, Wang Y, Qiu W, Han L, Gu X, Zhang H. Clinical characteristics and genotypes of 201 patients with mucopolysaccharidosis type II in China: A retrospective, observational study. Clin Genet 2023; 103:655-662. [PMID: 36945845 DOI: 10.1111/cge.14329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/09/2023] [Accepted: 03/12/2023] [Indexed: 03/23/2023]
Abstract
Mucopolysaccharidosis type II (MPS II) is an X-linked recessive lysosomal storage disease caused by a disease-associated variant in the IDS gene, which encodes iduronate 2-sulfatase (IDS). We aimed to characterize the clinical characteristics and genotypes of the largest cohort of Chinese patients with MPS II and so gain a deeper understanding of natural disease progression. Patients with confirmed MPS II and without treatment were included. The disease was classified as severe in patients with neurological impairment, and as attenuated in patients aged >6 years without neurological impairment. Of the 201 male patients, 78.1% had severe MPS II. Cognitive regression occurred before age 6 years in 94.3% of patients. Of 122 IDS variants identified, 37 were novel. Among the large gene alteration types identified, only the frequency of IDS-IDS2 recombination was significantly higher in severe versus attenuated MPS II (P = 0.032). Some identified point variants could inform the understanding of genotype-phenotype correlations. In conclusion, this study showed that classification of the disease as attenuated should only be made in patients aged >6 years. Our findings expand the understanding of the genotype-phenotype relationship, inform the diagnostic process, and provide an indication of the likely prognosis.
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Affiliation(s)
- Lin Zhong
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Xiaolan Gao
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Yu Wang
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Wenjuan Qiu
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Lianshu Han
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Xuefan Gu
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
| | - Huiwen Zhang
- Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, People's Republic of China
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42
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Radziszewski M, Kuś A, Bednarczuk T. Genotype-phenotype correlations in Graves' disease. Best Pract Res Clin Endocrinol Metab 2023; 37:101745. [PMID: 36828713 DOI: 10.1016/j.beem.2023.101745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Graves' disease (GD) is a heterogeneous autoimmune disease affecting with varying degrees of severity the thyroid gland, orbital tissues and skin. The pathogenesis of GD involves a complex interplay between multiple genetic, environmental and endogenous factors. Although the genetic predisposition to GD is well established, the significance of genotype-phenotype correlations and the role of epigenetic modifications in the disease pathogenesis remains largely unknown. In this review, we provide an up-to-date overview of genotype-phenotype correlations and summarize possible clinical implications of genetic and epigenetic markers in GD patients. We will specifically discuss the association of genetic markers and epigenetic modifications with age of GD onset, severity of Graves' hyperthyroidism and the development of clinically evident Graves' orbitopathy.
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Affiliation(s)
- Mikołaj Radziszewski
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw, Poland.
| | - Aleksander Kuś
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw, Poland.
| | - Tomasz Bednarczuk
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw, Poland.
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Sarasua SM, DeLuca JM, Rogers C, Phelan K, Rennert L, Powder KE, Weisensee K, Boccuto L. Head Size in Phelan-McDermid Syndrome: A Literature Review and Pooled Analysis of 198 Patients Identifies Candidate Genes on 22q13. Genes (Basel) 2023; 14:540. [PMID: 36980813 PMCID: PMC10048319 DOI: 10.3390/genes14030540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/11/2023] [Accepted: 02/12/2023] [Indexed: 02/24/2023] Open
Abstract
Phelan-McDermid syndrome (PMS) is a multisystem disorder that is associated with deletions of the 22q13 genomic region or pathogenic variants in the SHANK3 gene. Notable features include developmental issues, absent or delayed speech, neonatal hypotonia, seizures, autism or autistic traits, gastrointestinal problems, renal abnormalities, dolichocephaly, and both macro- and microcephaly. Assessment of the genetic factors that are responsible for abnormal head size in PMS has been hampered by small sample sizes as well as a lack of attention to these features. Therefore, this study was conducted to investigate the relationship between head size and genes on chromosome 22q13. A review of the literature was conducted to identify published cases of 22q13 deletions with information on head size to conduct a pooled association analysis. Across 56 studies, we identified 198 cases of PMS with defined deletion sizes and head size information. A total of 33 subjects (17%) had macrocephaly, 26 (13%) had microcephaly, and 139 (70%) were normocephalic. Individuals with macrocephaly had significantly larger genomic deletions than those with microcephaly or normocephaly (p < 0.0001). A genomic region on 22q13.31 was found to be significantly associated with macrocephaly with CELSR1, GRAMD4, and TBCD122 suggested as candidate genes. Investigation of these genes will aid the understanding of head and brain development.
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Affiliation(s)
- Sara M. Sarasua
- Healthcare Genetics and Genomics Program, Clemson University School of Nursing, Clemson, SC 29634, USA
| | - Jane M. DeLuca
- Healthcare Genetics and Genomics Program, Clemson University School of Nursing, Clemson, SC 29634, USA
| | | | - Katy Phelan
- Florida Cancer Specialists & Research Institute, Fort Myers, FL 33908, USA
| | - Lior Rennert
- Department of Public Health Sciences, Clemson University, Clemson, SC 29634, USA
| | - Kara E. Powder
- Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA
| | - Katherine Weisensee
- Department of Sociology, Anthropology and Criminal Justice, Clemson University, Clemson, SC 29634, USA
| | - Luigi Boccuto
- Healthcare Genetics and Genomics Program, Clemson University School of Nursing, Clemson, SC 29634, USA
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Xia D, Deng S, Gao C, Li X, Zhang L, Xiao X, Peng X, Zhang J, He Z, Meng Z, Liu Z, Ouyang N, Liang L. ARID2, a rare cause of Coffin-Siris syndrome: A novel microdeletion at 12q12q13.11 causing severe short stature and literature review. Am J Med Genet A 2023; 191:1240-1249. [PMID: 36756859 DOI: 10.1002/ajmg.a.63139] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/11/2023] [Accepted: 01/23/2023] [Indexed: 02/10/2023]
Abstract
Coffin-Siris syndrome (CSS) 6 is caused by heterozygous pathogenic variants in the AT-rich interaction domain 2 (ARID2) gene on 12q12. Currently, only 26 cases with both detailed clinical and genetic information have been documented in the literature. Microdeletions of the entire ARID2 gene are rare. In this study, we report a 5-year-7-month-old Chinese female who underwent whole-exome sequencing to discover that she had a de novo 1.563 Mb heterozygous copy number loss at 12q12q13.11, involving an entire deletion of ARID2. The female had severe short stature with obvious dysmorphic facial features, global developmental delay and hypoplastic fingers and toes. Her growth hormone level was normal, with reduced IGF-1 and increased CA19-9 levels. After a review of the 27 patients with ARID2 deficiency, a significant positive correlation was observed between age and height standard deviation score (SDS) (r = 0.71, p = 0.0002), suggesting a possibility of growth catch-up. This study expands the genetic and phenotypic spectrum of CCS6 and provides a decision-making reference for growth hormone therapy.
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Affiliation(s)
- Dan Xia
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shuyun Deng
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Chenchen Gao
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaojuan Li
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lina Zhang
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoqin Xiao
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaofang Peng
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jieming Zhang
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhanwen He
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhe Meng
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zulin Liu
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Nengtai Ouyang
- Cellular and Molecular Diagnostics Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liyang Liang
- Department of Children's Neuro-endocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
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Seo J, Shin S, Kim SW, Kim SJ, Lee M, Song K, Suh J, Lee ST, Lee YS, Chae HW, Kim HS, Choi JR, Han S, Kwon A. The Genotype-Phenotype Correlation in Human 5α-Reductase Type 2 Deficiency: Classified and Analyzed from a SRD5A2 Structural Perspective. Int J Mol Sci 2023; 24. [PMID: 36834714 DOI: 10.3390/ijms24043297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023] Open
Abstract
The phenotype of the 5α-reductase type 2 deficiency (5αRD2) by the SRD5A2 gene mutation varies, and although there have been many attempts, the genotype-phenotype correlation still has not yet been adequately evaluated. Recently, the crystal structure of the 5α-reductase type 2 isozyme (SRD5A2) has been determined. Therefore, the present study retrospectively evaluated the genotype-phenotype correlation from a structural perspective in 19 Korean patients with 5αRD2. Additionally, variants were classified according to structural categories, and phenotypic severity was compared with previously published data. The p.R227Q variant, which belongs to the NADPH-binding residue mutation category, exhibited a more masculine phenotype (higher external masculinization score) than other variants. Furthermore, compound heterozygous mutations with p.R227Q mitigated phenotypic severity. Similarly, other mutations in this category showed mild to moderate phenotypes. Conversely, the variants categorized as structure-destabilizing and small to bulky residue mutations showed moderate to severe phenotypes, and those categorized as catalytic site and helix-breaking mutations exhibited severe phenotypes. Therefore, the SRD5A2 structural approach suggested that a genotype-phenotype correlation does exist in 5αRD2. Furthermore, the categorization of SRD5A2 gene variants according to the SRD5A2 structure facilitates the prediction of the severity of 5αRD2 and the management and genetic counseling of patients affected by it.
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Jacquin C, Landais E, Poirsier C, Afenjar A, Akhavi A, Bednarek N, Bénech C, Bonnard A, Bosquet D, Burglen L, Callier P, Chantot-Bastaraud S, Coubes C, Coutton C, Delobel B, Descharmes M, Dupont JM, Gatinois V, Gruchy N, Guterman S, Heddar A, Herissant L, Heron D, Isidor B, Jaeger P, Jouret G, Keren B, Kuentz P, Le Caignec C, Levy J, Lopez N, Manssens Z, Martin-Coignard D, Marey I, Mignot C, Missirian C, Pebrel-Richard C, Pinson L, Puechberty J, Redon S, Sanlaville D, Spodenkiewicz M, Tabet AC, Verloes A, Vieville G, Yardin C, Vialard F, Doco-Fenzy M. 1p36 deletion syndrome: Review and mapping with further characterization of the phenotype, a new cohort of 86 patients. Am J Med Genet A 2023; 191:445-458. [PMID: 36369750 PMCID: PMC10100125 DOI: 10.1002/ajmg.a.63041] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 08/29/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022]
Abstract
Chromosome 1p36 deletion syndrome (1p36DS) is one of the most common terminal deletion syndromes (incidence between 1/5000 and 1/10,000 live births in the American population), due to a heterozygous deletion of part of the short arm of chromosome 1. The 1p36DS is characterized by typical craniofacial features, developmental delay/intellectual disability, hypotonia, epilepsy, cardiomyopathy/congenital heart defect, brain abnormalities, hearing loss, eyes/vision problem, and short stature. The aim of our study was to (1) evaluate the incidence of the 1p36DS in the French population compared to 22q11.2 deletion syndrome and trisomy 21; (2) review the postnatal phenotype related to microarray data, compared to previously publish prenatal data. Thanks to a collaboration with the ACLF (Association des Cytogénéticiens de Langue Française), we have collected data of 86 patients constituting, to the best of our knowledge, the second-largest cohort of 1p36DS patients in the literature. We estimated an average of at least 10 cases per year in France. 1p36DS seems to be much less frequent than 22q11.2 deletion syndrome and trisomy 21. Patients presented mainly dysmorphism, microcephaly, developmental delay/intellectual disability, hypotonia, epilepsy, brain malformations, behavioral disorders, cardiomyopathy, or cardiovascular malformations and, pre and/or postnatal growth retardation. Cardiac abnormalities, brain malformations, and epilepsy were more frequent in distal deletions, whereas microcephaly was more common in proximal deletions. Mapping and genotype-phenotype correlation allowed us to identify four critical regions responsible for intellectual disability. This study highlights some phenotypic variability, according to the deletion position, and helps to refine the phenotype of 1p36DS, allowing improved management and follow-up of patients.
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Affiliation(s)
- Clémence Jacquin
- Service de Génétique, CRMR AnDDI-Rares, CHU Reims, Reims, France
| | - Emilie Landais
- Service de Génétique, CRMR AnDDI-Rares, CHU Reims, Reims, France
| | - Céline Poirsier
- Service de Génétique, CRMR AnDDI-Rares, CHU Reims, Reims, France
| | - Alexandra Afenjar
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique et Embryologie Médicale, APHP, Hôpital Trousseau, Paris, France
| | - Ahmad Akhavi
- Cardiologie pédiatrique et congénitale, CHU Reims, Reims, France
| | - Nathalie Bednarek
- Service de pédiatrie, Pôle Femme Parents Enfants, CHU Reims, Reims, France.,CReSTIC/EA 3804, URCA, Reims, France
| | - Caroline Bénech
- University of Brest, Inserm, EFS, UMR 1078, GGB, Brest, France
| | - Adeline Bonnard
- Département de Génétique, Hôpital Robert Debré, Paris, France
| | - Damien Bosquet
- Service de Génétique, Hospices Civils de Lyon, Bron, France
| | - Lydie Burglen
- Centre de Référence des Malformations et Maladies Congénitales du Cervelet, Département de Génétique et Embryologie Médicale, APHP, Hôpital Trousseau, Paris, France
| | | | - Sandra Chantot-Bastaraud
- AP-HP Sorbonne Université, Département de Génétique Médicale, Hôpital Armand Trousseau, Paris, France
| | - Christine Coubes
- Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SOOR, Montpellier, France
| | - Charles Coutton
- Département de Génétique et Procréation, Hôpital Couple Enfant, CHU Grenoble-Alpes, Grenoble, France.,Genetic Epigenetic and Therapies of Infertility team, Institute for Advanced Biosciences, Inserm U 1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Bruno Delobel
- Centre de Génétique Chromosomique, GH de l'Institut Catholique de Lille-Hopital Saint Vincent de Paul, Lille, France
| | - Margaux Descharmes
- Service de pédiatrie, Pôle Femme Parents Enfants, CHU Reims, Reims, France
| | - Jean-Michel Dupont
- Laboratoire de Cytogénétique Constitutionnelle, APHP. Centre-Université Paris Cité site Cochin, Paris, France
| | - Vincent Gatinois
- Plateforme ChromoStem, Unité de génétique chromosomique, Département de génétique moléculaire et cytogénomique, CHU de Montpellier, Université de Montpellier, Montpellier, France
| | - Nicolas Gruchy
- Service de Génétique, CHU Caen, Université Caen Normandie, Caen, France
| | - Sarah Guterman
- Département de Génétique, Centre Hospitalier Intercommunal Poissy-St-Germain-en-Laye, Poissy, France
| | - Abdelkader Heddar
- Laboratoire de Cytogénétique Constitutionnelle, APHP. Centre-Université Paris Cité site Cochin, Paris, France
| | - Lucas Herissant
- Service de Génétique, CRMR AnDDI-Rares, CHU Reims, Reims, France
| | - Delphine Heron
- AP-HP Sorbonne Université, Département de Génétique Médicale, Hôpital Armand Trousseau, Paris, France.,Département de Génétique; Centre de Référence Déficience Intellectuelle de Causes Rares, APHP Sorbonne Université, GH Pitié-Salpêtrière, Paris, France
| | - Bertrand Isidor
- Service de Génétique Médicale, CHU de Nantes, Nantes, France
| | - Pauline Jaeger
- Service de Génétique, Hospices Civils de Lyon, Bron, France
| | - Guillaume Jouret
- National Center of Genetics, Laboratoire National de Santé, Dudelange, Luxembourg
| | - Boris Keren
- Département de Génétique; Centre de Référence Déficience Intellectuelle de Causes Rares, APHP Sorbonne Université, GH Pitié-Salpêtrière, Paris, France
| | - Paul Kuentz
- Oncobiologie Génétique Bioinformatique, CHU de Besançon, Besançon, France
| | | | - Jonathan Levy
- Département de Génétique, Hôpital Robert Debré, Paris, France
| | - Nathalie Lopez
- Service de neuropédiatrie, Hôpital Armand Trousseau, Groupe Hospitalier Universitaire de l'Est Parisien, Paris, France
| | - Zoe Manssens
- Centre de Génétique Chromosomique, GH de l'Institut Catholique de Lille-Hopital Saint Vincent de Paul, Lille, France
| | | | - Isabelle Marey
- Département de Génétique et Procréation, Hôpital Couple Enfant, CHU Grenoble-Alpes, Grenoble, France
| | - Cyril Mignot
- AP-HP Sorbonne Université, Département de Génétique Médicale, Hôpital Armand Trousseau, Paris, France.,Département de Génétique; Centre de Référence Déficience Intellectuelle de Causes Rares, APHP Sorbonne Université, GH Pitié-Salpêtrière, Paris, France
| | - Chantal Missirian
- Laboratoire de Génétique Chromosomique, Département de Génétique Médicale, AP- HM, Marseille, France
| | - Céline Pebrel-Richard
- Service de Cytogénétique Médicale, CHU de Clermont-Ferrand, Clermont-Ferrand, France
| | - Lucile Pinson
- Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SOOR, Montpellier, France
| | - Jacques Puechberty
- Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, Génétique clinique, CHU Montpellier, Université Montpellier, Centre de référence anomalies du développement SOOR, Montpellier, France
| | - Sylvia Redon
- University of Brest, Inserm, EFS, UMR 1078, GGB, Brest, France.,Service de Génétique Médicale et Biologie de la Reproduction, CHU de Brest, Brest, France
| | | | | | | | - Alain Verloes
- Département de Génétique, Hôpital Robert Debré, Paris, France
| | - Gaelle Vieville
- Département de Génétique et Procréation, Hôpital Couple Enfant, CHU Grenoble-Alpes, Grenoble, France
| | - Catherine Yardin
- Department of Cytogenetics and clinical genetics, Limoges University Hospital, University of Limoges, Limoges, France
| | - François Vialard
- Département de Génétique, Centre Hospitalier Intercommunal Poissy-St-Germain-en-Laye, Poissy, France.,RHuMA, UMR BREED, INRAE-UVSQ-ENVA, Montigny-le-bretonneux, France
| | - Martine Doco-Fenzy
- Service de Génétique, CRMR AnDDI-Rares, CHU Reims, Reims, France.,Service de génétique médicale, CHU de Nantes, Nantes, France.,L'institut du thorax, INSERM, CNRS, UNIV Nantes, CHU de Nantes, Nantes, France
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Dallagnol TN, Da Cás E, Junior OR, Casali-da-Rocha JC. Comprehensive characterization and building of National Registry of von Hippel-Lindau disease in Brazil. Mol Genet Genomic Med 2023; 11:e2136. [PMID: 36625343 PMCID: PMC10094063 DOI: 10.1002/mgg3.2136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 12/03/2022] [Accepted: 12/27/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Von Hippel-Lindau (VHL) disease is an autosomal dominant disorder caused by pathogenic variants in VHL gene. The common manifestations include hemangioblastomas (HB) of the central nervous system (CNS) and retina (RH); pheochromocytoma (PHEO); clear cell renal cell carcinoma (ccRCC); pancreatic and renal cysts (PRC) and pancreatic neuroendocrine neoplasm (PNEN). METHODS The first characterization of VHL in Brazil was published in 2003 and included 20 families with a history of VHL. The aim of this study was to expand the previous Brazilian cohort to include more families, as well as to collect prospectively both clinical and molecular characteristics of patients with VHL to build the VHL Brazilian Registry (VHLBR). Patients with VHL were selected through review of data from medical records of experts and from social networks of support for families with VHL in Brazil. RESULTS A total of 142 subjects representing 62 unrelated Brazilian families with VHL were registered. The mean age of VHL onset was 28.78 years old and 128 individuals (90.1%) had at least one VHL-related lesion. CNS HB was the most common manifestation occurring in 91 (71%) patients, followed by multiple PRC (48.4%), RH (39.8%), ccRCC (28.9%), PHEO (12.5%) and PNEN (7.8%). Of the 97 subjects whose presence of VHL variants was confirmed, 51 (52.6%) had missense variants, 22 (22.7%) large deletions, 10 (10.3%) frameshift, 7 (7.2%) splice site, 4 (4.1%) nonsense and 3 (3.1%) in-frame deletions. Regarding surveillance, 115 (81%) participants had at least one physician responsible for their outpatient follow-up; however, 69 (60%) of them did not report a regular frequency of tests. CONCLUSION We built the largest prospective VHLBR with organized collections of clinical and genetic data from families with VHL, which will be helpful to guide policies for VHL care and oncogenetics in Brazil. Although there have been improvements in diagnosis and clinical screening methods, VHL care in Brazil is still deficient, especially regarding surveillance and regular medical appointments with experts.
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Affiliation(s)
| | - Eduardo Da Cás
- Faculty of Medicine, Universidade Positivo, Curitiba, Brazil
| | - Odery Ramos Junior
- Department of Internal Medicine, Hospital de Clínicas - Universidade Federal do Paraná, Curitiba, Brazil
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48
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Gianferrari G, Martinelli I, Simonini C, Zucchi E, Fini N, Carra S, Moglia C, Mandrioli J. Case report: p.Glu134del SOD1 mutation in two apparently unrelated ALS patients with mirrored phenotype. Front Neurol 2023; 13:1052341. [PMID: 36686515 PMCID: PMC9846158 DOI: 10.3389/fneur.2022.1052341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 12/05/2022] [Indexed: 01/05/2023] Open
Abstract
With upcoming personalized approaches based on genetics, it is important to report new mutations in amyotrophic lateral sclerosis (ALS) genes in order to understand their pathogenicity and possible patient responses to specific therapies. SOD1 mutations are the second most frequent genetic cause of ALS in European populations. Here, we describe two seemingly unrelated Italian patients with ALS carrying the same SOD1 heterozygous c.400_402 deletion (p.Glu134del). Both patients had spinal onset in their lower limbs, progressive muscular weakness with respiratory involvement, and sparing bulbar function. In addition to the clinical picture, we discuss the possible pathogenic role of this unfamiliar SOD1 mutation.
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Affiliation(s)
- Giulia Gianferrari
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Ilaria Martinelli
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy,Clinical and Experimental PhD Program, University of Modena and Reggio Emilia, Modena, Italy,*Correspondence: Ilaria Martinelli ✉
| | - Cecilia Simonini
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Elisabetta Zucchi
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy,Neurosciences PhD Program, University of Modena and Reggio Emilia, Modena, Italy
| | - Nicola Fini
- Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy
| | - Serena Carra
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Cristina Moglia
- S.C Neurology 1U, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza Torino, Torino, Italy,“Rita Levi Montalcini” Department of Neuroscience, University of Turin, Torino, Italy
| | - Jessica Mandrioli
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy,Department of Neurosciences, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy
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Wang WJ, Xie JD, Yao H, Ding ZX, Jiang AR, Ma L, Shen HJ, Chen SN. Identification of variants in 94 Chinese patients with hereditary spherocytosis by next-generation sequencing. Clin Genet 2023; 103:67-78. [PMID: 36203343 DOI: 10.1111/cge.14244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/22/2022] [Accepted: 09/30/2022] [Indexed: 12/13/2022]
Abstract
Hereditary spherocytosis (HS) is the most common type of hereditary erythrocyte membrane disease and has varied phenotypic features and genetic patterns. We herein performed a retrospective study of 94 patients with HS and aimed to investigate the genetic variations and genotype-phenotype correlations using targeted next-generation sequencing. In 79/94 (84%) patients, 83 HS variants including 67 novel variants were identified. Pathogenic variants of SPTB, ANK1, SLC4A1, SPTA1, and EPB42 were found in 32/79(41%), 22/79(28%), 15/79 (19%), 8/79 (9%), and 3/79 (4%) of the patients respectively, revealing that SPTB is the most frequently mutated HS gene in Eastern China. Most SPTB and ANK1 gene variations were nonsense and frameshift variations. Missense variants were the main variant type of SLC4A1, SPTA1, and EPB42 genes. Interestingly, one SPTA1 variant (p. Arg1757Cys) showed an autosomal dominant inheritance pattern and one EPB42 variant (p. Gln377His) was apparent as a hotspot variation. Furthermore, genotype-phenotype analysis was performed among the five mutated gene groups. Besides the finding that patients with the SLC4A1 variant had the highest mean corpuscular hemoglobin levels, no clear correlations between genotype and phenotype were observed.
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Affiliation(s)
- Wen-Juan Wang
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Jun-Dan Xie
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Hong Yao
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Zi-Xuan Ding
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Ai-Rui Jiang
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Liang Ma
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Hong-Jie Shen
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
| | - Su-Ning Chen
- National Clinical Research Center for Hematologic Diseases, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Suzhou, China
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50
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Supsrisunjai C, Bunnag T, Chaowalit P, Boonpuen N, Kootiratrakarn T, Wessagowit V. Clinical and molecular characteristics of autosomal recessive congenital ichthyosis in Thailand. Pediatr Dermatol 2023; 40:107-112. [PMID: 36262015 DOI: 10.1111/pde.15156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/25/2022] [Indexed: 01/28/2023]
Abstract
BACKGROUND Autosomal recessive congenital ichthyosis (ARCI) is a heterogenous group of rare keratinization disorders. To date, more than 13 causative genes have been identified. However, data on clinical and molecular characteristics including genotype-phenotype correlation are lacking in Thailand. OBJECTIVE We collected cases diagnosed with non-syndromic ARCI and syndromic recessive congenital ichthyosis at the Institute of Dermatology from 2011 to 2021 and performed genetic testing with next-generation sequencing and assessed clinical details. METHODS Baseline demographic data, birth history, family history, skin manifestations at birth, current cutaneous manifestations, comorbidities, and response to treatments were assessed. DNA was screened for mutations using targeted gene sequencing of 45 genes related to congenital ichthyosis. RESULTS A total of 33 patients were analyzed with an average age of 23.8 ± 13.9 years. Congenital ichthyosiform erythroderma (CIE) was most common (60.6%), followed by lamellar ichthyosis (18.2%), self-improving congenital ichthyosis (6.1%), Netherton syndrome (6.1%), ichthyosis prematurity syndrome (3%), Sjögren-Larsson syndrome (3%) and bathing suit ichthyosis (3%). Eight genes were found with pathogenic variants in our cohort as follows: ABCA12 42.4% (14/33), NIPAL4 24.2% (8/33), TGM1 15.2% (5/33), SPINK5 6.1% (2/33), ALDH3A2 3% (1/33), SLC27A4 3% (1/33), CYP4F22 3% (1/33), and ST14 3% (1/33). Clinically, 79% of patients with ABCA12 pathogenic variants in this study had CIE, 79% of w had novel biallelic pathogenic compound heterozygous variants, whereas 21% had homozygous missense variants. CONCLUSIONS This is the first study to describe clinical and molecular findings of ARCI in a cohort from Thailand. Our findings demonstrate the clinical spectrum of the diseases and expand the molecular findings in a Southeast Asian population.
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Affiliation(s)
- Chavalit Supsrisunjai
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand.,Department of Internal Medicine, College of Medicine, Rangsit University, Bangkok, Thailand
| | - Thareena Bunnag
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand
| | - Prapaipit Chaowalit
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand
| | - Niorn Boonpuen
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand.,Department of Internal Medicine, College of Medicine, Rangsit University, Bangkok, Thailand
| | - Tanawatt Kootiratrakarn
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand.,Department of Internal Medicine, College of Medicine, Rangsit University, Bangkok, Thailand
| | - Vesarat Wessagowit
- Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand
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