Genetic findings in Czech patients with limb girdle muscular dystrophy

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Authors

ZÍDKOVÁ Jana KRAMÁŘOVÁ Tereza KOPČILOVÁ Johana RÉBLOVÁ Kamila HABERLOVÁ Jana MAZANEC Radim VOHÁŇKA Stanislav GŘEGOŘOVÁ Andrea LANGOVÁ Martina HONZÍK Tomáš ŠOUKALOVÁ Jana OŠLEJŠKOVÁ Hana SOLAŘOVÁ Pavla VYHNÁLKOVÁ Emilie FAJKUSOVÁ Lenka

Year of publication 2023
Type Article in Periodical
Magazine / Source Clinical Genetics
MU Faculty or unit

Faculty of Medicine

Citation
Web https://doi.org/10.1111/cge.14407
Doi http://dx.doi.org/10.1111/cge.14407
Keywords genetic diagnostics; LGMD; limb girdle muscular dystrophy; next generation sequencing
Description Limb girdle muscular dystrophies (LGMD) are a genetically heterogeneous group of muscular dystrophies. The study presents an overview of molecular characteristics of a large cohort of LGMD patients who are representative of the Czech LGMD population. We present 226 LGMD probands in which 433 mutant alleles carrying 157 different variants with a supposed pathogenic effect were identified. Fifty-four variants have been described only in the Czech LGMD population so far. LGMD R1 caplain3-related is the most frequent subtype of LGMD involving 53.1% of patients with genetically confirmed LGMD, followed by LGMD R9 FKRP-related (11.1%), and LGMD R12 anoctamin5-related (7.1%). If we consider identified variants, then all but five were small-scale variants. One large gene deletion was identified in the LAMA2 gene and two deletions in each of CAPN3 and SGCG. We performed comparison our result with other published studies. The results obtained in the Czech LGMD population clearly differ from the outcome of other LGMD populations in two aspects-we have a more significant proportion of patients with LGMD R1 calpain3-related and a smaller proportion of LGMD R2 dysferlin-related.
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