Genetic and Structural Variations in Czech Patients With Congenital Myopathies.

IF 2.3 3区 医学 Q2 GENETICS & HEREDITY
Jana Zídková, Barbora Lauerová, Lívie Mensová, Tereza Kramářová, Johana Kopčilová, Kamila Réblová, Magdaléna Soukup Vodičková, Martina Hujňáková, Jana Haberlová, Marie Rohlenová, Radim Mazanec, Jana Šoukalová, Renata Gaillyová, Emílie Vyhnálková, Miroslava Balaščaková, Pavlína Danhofer, Lenka Juříková, Dagmar Grečmalová, Andrea Gřegořová, Pavlína Plevová, Martina Langová, Tomáš Honzík, Martin Magner, Martina Klincová, Pavla Solařová, Mária Šenkeříková, Lenka Fajkusová
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引用次数: 0

Abstract

Congenital myopathies (CMs) are a heterogeneous group of genetic muscle disorders characterized by hypotonia and muscle weakness, with pathogenic variants identified in at least 41 genes and inheritance patterns including autosomal dominant (AD), recessive (AR), and X-linked (XL). We present 79 unrelated patients with genetically confirmed CM using next-generation sequencing (NGS). A total of 113 mutant alleles carrying 97 different variants with a presumed pathogenic effect were identified. According to the HGMD database, 54 of these variants have been reported exclusively in the Czech CM population to date. All but five variants were small-scale. Large gene deletions were identified in the MTM1, NEB, and RYR1 genes. Sequencing of breakpoint junctions in the identified NEB and RYR1 deletions provided insights into the upstream mechanisms leading to genomic instability and resulting in structural variations. We present the family with dominant inheritance of the NEB deletion of exons 19-78. We assume that our family represents another reported case of a dominant mutation in the NEB gene. Our results contribute to further knowledge in the field of neuromuscular diseases and mutational mechanisms.

捷克先天性肌病患者的遗传和结构变异。
先天性肌病(CMs)是一种异质性的遗传性肌肉疾病,其特征是张力低下和肌肉无力,在至少41个基因中发现了致病变异,遗传模式包括常染色体显性(AD)、隐性(AR)和x连锁(XL)。我们报告了79例使用新一代测序(NGS)遗传证实的CM患者。共鉴定出113个突变等位基因,携带97种不同的变异,具有推定的致病作用。根据HGMD数据库,迄今为止在捷克CM人群中已经报道了54个这些变体。除了五个变种外,其他都是小规模的。在MTM1、NEB和RYR1基因中发现了大的基因缺失。对已鉴定的NEB和RYR1缺失的断点连接进行测序,有助于深入了解导致基因组不稳定和结构变异的上游机制。我们提出了NEB外显子19-78缺失的显性遗传家族。我们假设我们的家庭代表了另一个报告的NEB基因显性突变的病例。我们的研究结果有助于进一步了解神经肌肉疾病和突变机制。
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来源期刊
Clinical Genetics
Clinical Genetics 医学-遗传学
CiteScore
6.50
自引率
0.00%
发文量
175
审稿时长
3-8 weeks
期刊介绍: Clinical Genetics links research to the clinic, translating advances in our understanding of the molecular basis of genetic disease for the practising clinical geneticist. The journal publishes high quality research papers, short reports, reviews and mini-reviews that connect medical genetics research with clinical practice. Topics of particular interest are: • Linking genetic variations to disease • Genome rearrangements and disease • Epigenetics and disease • The translation of genotype to phenotype • Genetics of complex disease • Management/intervention of genetic diseases • Novel therapies for genetic diseases • Developmental biology, as it relates to clinical genetics • Social science research on the psychological and behavioural aspects of living with or being at risk of genetic disease
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