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Defining the genetic architecture of hypertrophic cardiomyopathy: re-evaluating the role of non-sarcomeric genes.

Abstract：

Aim:Hypertrophic cardiomyopathy (HCM) exhibits genetic heterogeneity that is dominated by variation in eight sarcomeric genes. Genetic variation in a large number of non-sarcomeric genes has also been implicated in HCM but not formally assessed. Here we used very large case and control cohorts to determine the extent to which variation in non-sarcomeric genes contributes to HCM. Methods and results:We sequenced known and putative HCM genes in a new large prospective HCM cohort (n = 804) and analysed data alongside the largest published series of clinically genotyped HCM patients (n = 6179), previously published HCM cohorts and reference population samples from the exome aggregation consortium (ExAC, n = 60 706) to assess variation in 31 genes implicated in HCM. We found no significant excess of rare (minor allele frequency < 1:10 000 in ExAC) protein-altering variants over controls for most genes tested and conclude that novel variants in these genes are rarely interpretable, even for genes with previous evidence of co-segregation (e.g. ACTN2). To provide an aid for variant interpretation, we integrated HCM gene sequence data with aggregated pedigree and functional data and suggest a means of assessing gene pathogenicity in HCM using this evidence. Conclusion:We show that genetic variation in the majority of non-sarcomeric genes implicated in HCM is not associated with the condition, reinforce the fact that the sarcomeric gene variation is the primary cause of HCM known to date and underscore that the aetiology of HCM is unknown in the majority of patients.

journal_name

Eur Heart J

journal_title

European heart journal

authors

Walsh R,Buchan R,Wilk A,John S,Felkin LE,Thomson KL,Chiaw TH,Loong CCW,Pua CJ,Raphael C,Prasad S,Barton PJ,Funke B,Watkins H,Ware JS,Cook SA

doi

10.1093/eurheartj/ehw603

subject

Has Abstract

pub_date

2017-12-07 00:00:00

pages

3461-3468

issue

46

eissn

0195-668X

issn

1522-9645

pii

ehw603

journal_volume

38

pub_type

杂志文章

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