The 4q25 variant rs13143308T links risk of atrial fibrillation to defective calcium homoeostasis.

ABSTRACT:

Aims

Single nucleotide polymorphisms on chromosome 4q25 have been associated with risk of atrial fibrillation (AF) but the exiguous knowledge of the mechanistic links between these risk variants and underlying electrophysiological alterations hampers their clinical utility. Here, we tested the hypothesis that 4q25 risk variants cause alterations in the intracellular calcium homoeostasis that predispose to spontaneous electrical activity.

Methods and results

Western blotting, confocal calcium imaging, and patch-clamp techniques were used to identify mechanisms linking the 4q25 risk variants rs2200733T and rs13143308T to defects in the calcium homoeostasis in human atrial myocytes. Our findings revealed that the rs13143308T variant was more frequent in patients with AF and tha

SUBMITTER: Herraiz-Martinez A 

PROVIDER: S-EPMC6383060 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature