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Search Results for all work with filters:

  • Haessler, Jeffrey
  • Engineering, Biomedical
  • heart
  • qrs
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Article

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

by Bram P. Prins; Timothy J. Mead; Jennifer A. Brody; Gardar Sveinbjornsson; Ioanna Ntalla; Nathan A. Bihlmeyer; Marteen van den Berg; Jette Bork-Jensen; Stefania Cappellani; Stefan Van Duijvenboden; Nikolai T. Klena; George C. Gabriel; Xiaoqin Liu; Cagri Gulec; Niels Grarup; Jeffrey Haessler; Leanne M. Hall; Annamaria Iorio; Aaron Isaacs; Ruifang Li-Gao; Honghuang Lin; Ching-Ti Liu; Leo-Pekka Lyytikainen; Jonathan Marten; Hao Mei; Martina Mueller-Nurasyid; Michele Orini; Sandosh Padmanabhan; Farid Radmanesh; Alvaro Alonso

2018

Subjects
  • Health Sciences, Medicine and Surgery
  • Health Sciences, Epidemiology
  • Engineering, Biomedical
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Abstract:Close

Background: 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. Results: 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. Conclusions: Our approach identifies novel coding and non-coding variants underlying ventricular depolarization and provides a possible mechanism for the ADAMTS6-associated conduction changes.
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