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

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dc.contributor.author Johnson, Katherine
dc.contributor.author Bertoli, Marta
dc.contributor.author Phillips, Lauren
dc.contributor.author Töpf, Ana
dc.contributor.author Van den Bergh, Peter
dc.contributor.author Vissing, John
dc.contributor.author Witting, Nanna
dc.contributor.author Nafissi, Shahriar
dc.contributor.author Jamal-Omidi, Shirin
dc.contributor.author Łusakowska, Anna
dc.contributor.author Kostera-Pruszczyk, Anna
dc.contributor.author Potulska-Chromik, Anna
dc.contributor.author Deconinck, Nicolas
dc.contributor.author Wallgren-Pettersson, Carina
dc.contributor.author Strang-Karlsson, Sonja
dc.contributor.author Colomer, Jaume
dc.contributor.author Claeys, Kristl G
dc.contributor.author De Ridder, Willem
dc.contributor.author Baets, Jonathan
dc.contributor.author von der Hagen, Maja
dc.contributor.author Fernández-Torrón, Roberto
dc.contributor.author Zulaica Ijurco, Miren
dc.contributor.author Espinal Valencia, Juan B
dc.contributor.author Hahn, Andreas
dc.contributor.author Durmus, Hacer
dc.contributor.author Willis, Tracey
dc.contributor.author Xu, Liwen
dc.contributor.author Valkanas, Elise
dc.contributor.author Mullen, Thomas E
dc.contributor.author Lek, Monkol
dc.contributor.author MacArthur, Daniel G
dc.contributor.author Straub, Volker
dc.date.accessioned 2018-08-05T03:59:14Z
dc.date.available 2018-08-05T03:59:14Z
dc.date.issued 2018-07-30
dc.identifier.citation Skeletal Muscle. 2018 Jul 30;8(1):23
dc.identifier.uri http://hdl.handle.net/10138/237631
dc.description.abstract 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 250 ng DNA was completed using an Illumina exome capture and a 38 Mb 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.
dc.publisher BioMed Central
dc.subject Whole-exome sequencing
dc.subject Dystroglycanopathies
dc.subject Limb-girdle muscle weakness
dc.title 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
dc.date.updated 2018-08-05T03:59:14Z
dc.language.rfc3066 en
dc.rights.holder The Author(s).
dc.type.uri http://purl.org/eprint/entityType/ScholarlyWork
dc.type.uri http://purl.org/eprint/entityType/Expression
dc.type.uri http://purl.org/eprint/type/JournalArticle

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