Exome-chip meta-analysis identifies novel loci associated with cardiac conduction, including ADAMTS6.

Genome Biology
Bram P PrinsYalda Jamshidi

Abstract

Genome-wide association studies conducted on QRS duration, an electrocardiographic measurement associated with heart failure and sudden cardiac death, have led to novel biological insights into cardiac function. However, the variants identified fall predominantly in non-coding regions and their underlying mechanisms remain unclear. Here, we identify putative functional coding variation associated with changes in the QRS interval duration by combining Illumina HumanExome BeadChip genotype data from 77,898 participants of European ancestry and 7695 of African descent in our discovery cohort, followed by replication in 111,874 individuals of European ancestry from the UK Biobank and deCODE cohorts. We identify ten novel loci, seven within coding regions, including ADAMTS6, significantly associated with QRS duration in gene-based analyses. ADAMTS6 encodes a secreted metalloprotease of currently unknown function. In vitro validation analysis shows that the QRS-associated variants lead to impaired ADAMTS6 secretion and loss-of function analysis in mice demonstrates a previously unappreciated role for ADAMTS6 in connexin 43 gap junction expression, which is essential for myocardial conduction. Our approach identifies novel coding and ...Continue Reading

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Feb 1, 2019·Circulation·Emelia J BenjaminUNKNOWN American Heart Association Council on Epidemiology and Prevention Statistics Committee and Stroke Statistics Subcommittee
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Methods Mentioned

BETA
Exome-Chip
glycosylation
transfections
genotyping
Chip
PCR
confocal microscopy

Software Mentioned

SeqMeta
CLCBio Genomic Workbench
burdenMeta
SNPTEST
GWAMA
SIFT
Mutation Taster
LRT
GTEx
R

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