1. Detection of variants in dystroglycanopathy-associated genes through the application of targeted whole-exome sequencing analysis to a large cohort of patients with unexplained limb-girdle muscle weakness
- Author
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Shirin Jamal-Omidi, L. Phillips, Anna Kostera-Pruszczyk, Nanna Witting, Miren Zulaica Ijurco, Maja von der Hagen, Ana Töpf, Kristl G. Claeys, Jaume Colomer, Monkol Lek, Shahriar Nafissi, L. Xu, Daniel G. MacArthur, Elise Valkanas, Jonathan Baets, Anna Potulska-Chromik, Volker Straub, Anna Łusakowska, Peter Van den Bergh, Sonja Strang-Karlsson, Thomas E. Mullen, John Vissing, Marta Bertoli, Juan Bautista Espinal Valencia, Carina Wallgren-Pettersson, Willem De Ridder, Hacer Durmus, Tracey Willis, Katherine Johnson, Andreas Hahn, Roberto Fernández-Torrón, Nicolas Deconinck, UCL - (SLuc) Service de neurologie, UCL - SSS/IONS/NEUR - Clinical Neuroscience, Medicum, Department of Medical and Clinical Genetics, University of Helsinki, Clinicum, Children's Hospital, and HUS Children and Adolescents
- Subjects
0301 basic medicine ,Male ,lcsh:Diseases of the musculoskeletal system ,Glycosylation ,Whole Exome Sequencing/methods ,Muscle Proteins ,Hygiène et médecine sportives ,Bioinformatics ,WALKER-WARBURG-SYNDROME ,0302 clinical medicine ,Orthopedics and Sports Medicine ,Limb-girdle muscle weakness ,Child ,Dystroglycans ,Exome sequencing ,Muscle Proteins/genetics ,Aged, 80 and over ,Homozygote ,Middle Aged ,Dystroglycanopathies ,3. Good health ,Whole-exome sequencing ,medicine.anatomical_structure ,Phenotype ,Dystroglycans/metabolism ,Child, Preschool ,Orthopédie ,Congenital muscular dystrophy ,SKELETAL-MUSCLE ,Female ,medicine.symptom ,GLYCOPROTEIN COMPLEX ,Life Sciences & Biomedicine ,ALPHA-DYSTROGLYCAN ,Adult ,Heterozygote ,Proximal muscle weakness ,Adolescent ,EYE-BRAIN DISEASE ,03 medical and health sciences ,Young Adult ,Glycoprotein complex ,Exome Sequencing ,medicine ,Humans ,ABNORMAL GLYCOSYLATION ,Genetic Predisposition to Disease ,Walker–Warburg syndrome ,Biology ,Molecular Biology ,POMT2 MUTATIONS ,Aged ,Science & Technology ,Genetic heterogeneity ,business.industry ,Research ,Muscular Dystrophies, Limb-Girdle/genetics ,Muscle weakness ,Skeletal muscle ,Genetic Variation ,Cell Biology ,medicine.disease ,Cancérologie ,030104 developmental biology ,Muscular Dystrophies, Limb-Girdle ,Mutation ,CONGENITAL MUSCULAR-DYSTROPHY ,1182 Biochemistry, cell and molecular biology ,Biologie cellulaire ,Human medicine ,DEFECTIVE GLYCOSYLATION ,3111 Biomedicine ,lcsh:RC925-935 ,business ,030217 neurology & neurosurgery ,MENTAL-RETARDATION - Abstract
Background: Dystroglycanopathies are a clinically and genetically heterogeneous group of disorders that are typically characterised by limb-girdle muscle weakness. Mutations in 18 different genes have been associated with dystroglycanopathies, the encoded proteins of which typically modulate the binding of α-dystroglycan to extracellular matrix ligands by altering its glycosylation. This results in a disruption of the structural integrity of the myocyte, ultimately leading to muscle degeneration. Methods: Deep phenotypic information was gathered using the PhenoTips online software for 1001 patients with unexplained limb-girdle muscle weakness from 43 different centres across 21 European and Middle Eastern countries. Whole-exome sequencing with at least 250ng DNA was completed using an Illumina exome capture and a 38Mb baited target. Genes known to be associated with dystroglycanopathies were analysed for disease-causing variants. Results: Suspected pathogenic variants were detected in DPM3, ISPD, POMT1 and FKTN in one patient each, in POMK in two patients, in GMPPB in three patients, in FKRP in eight patients and in POMT2 in ten patients. This indicated a frequency of 2.7% for the disease group within the cohort of 1001 patients with unexplained limb-girdle muscle weakness. The phenotypes of the 27 patients were highly variable, yet with a fundamental presentation of proximal muscle weakness and elevated serum creatine kinase. Conclusions: Overall, we have identified 27 patients with suspected pathogenic variants in dystroglycanopathy-associated genes. We present evidence for the genetic and phenotypic diversity of the dystroglycanopathies as a disease group, while also highlighting the advantage of incorporating next-generation sequencing into the diagnostic pathway of rare diseases., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2018