New population-based exome data are questioning the pathogenicity of previously cardiomyopathy-associated genetic variants.

作者: Charlotte Andreasen , Jonas B Nielsen , Lena Refsgaard , Anders G Holst , Alex H Christensen

DOI: 10.1038/EJHG.2012.283

关键词:

摘要: Cardiomyopathies are a heterogeneous group of diseases with various etiologies. We focused on three genetically determined cardiomyopathies: hypertrophic (HCM), dilated (DCM), and arrhythmogenic right ventricular cardiomyopathy (ARVC). Eighty-four genes have so far been associated these cardiomyopathies, but the disease-causing effect reported variants is often dubious. In order to identify possible false-positive variants, we investigated prevalence previously cardiomyopathy-associated in recently published exome data. searched for missense nonsense NHLBI-Go Exome Sequencing Project (ESP) containing data from 6500 individuals. ESP, identified 94 out 687 (14%) HCM, 58 337 (17%) DCM, 38 209 (18%) ARVC. These findings correspond genotype 1:4 1:6 1:5 PolyPhen-2 predictions were conducted all variants. found significant overrepresentation predicted as being benign among those present ESP compared ones not present. validate our findings, seven genotyped control population this revealed frequencies comparable ESP. conclusion, prevalences up more than one thousand times higher expected phenotype general (HCM 1:500, DCM 1:2500, ARVC 1:5000) suggest that high number monogenic causes cardiomyopathy.

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