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• W4308883294 abstract "Abstract Background Cardiomyopathies are a leading cause of progressive heart failure and sudden cardiac death; however, their genetic aetiology remains poorly understood. We hypothesised that variants in noncoding regulatory regions and oligogenic inheritance mechanisms may help close the diagnostic gap. Methods We first analysed whole-genome sequencing data of 143 parent–offspring trios from Genomics England 100,000 Genomes Project. We used gene panel testing and a phenotype-based, variant prioritisation framework called Exomiser to identify candidate genes in trios. To assess the contribution of noncoding DNVs to cardiomyopathies, we intersected DNVs with open chromatin sequences from single-cell ATAC-seq data of cardiomyocytes. We also performed a case–control analysis in an exome-negative cohort, including 843 probands and 19,467 controls, to assess the association between noncoding variants in known cardiomyopathy genes and disease. Results In the trio analysis, a definite or probable genetic diagnosis was identified in 21 probands according to the American College of Medical Genetics guidelines. We identified novel DNVs in diagnostic-grade genes ( RYR2, TNNT2, PTPN11, MYH7, LZR1, NKX2-5 ), and five cases harbouring a combination of prioritised variants, suggesting that oligogenic inheritance and genetic modifiers contribute to cardiomyopathies. Phenotype-based ranking of candidate genes identified in noncoding DNV analysis revealed JPH2 as the top candidate. Moreover, a case–control analysis revealed an enrichment of rare noncoding variants in regulatory elements of cardiomyopathy genes (p = .035, OR = 1.43, 95% Cl = 1.095–1.767) versus controls. Of the 25 variants associated with disease ( p < 0.5), 23 are novel and nine are predicted to disrupt transcription factor binding motifs. Conclusion Our results highlight complex genetic mechanisms in cardiomyopathies and reveal novel genes for future investigations." @default.
• W4308883294 created "2022-11-18" @default.
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• W4308883294 date "2022-11-10" @default.
• W4308883294 modified "2023-10-14" @default.
• W4308883294 title "De novo and inherited variants in coding and regulatory regions in genetic cardiomyopathies" @default.
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• W4308883294 doi "https://doi.org/10.1186/s40246-022-00420-0" @default.
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