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XB-ART-56892
Elife 2020 Mar 24;9. doi: 10.7554/eLife.51453.
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Polyunsaturated fatty acid analogues differentially affect cardiac NaV, CaV, and KV channels through unique mechanisms.

Bohannon BM , de la Cruz A , Wu X , Jowais JJ , Perez ME , Dykxhoorn DM , Liin SI , Larsson HP .


Abstract
The cardiac ventricular action potential depends on several voltage-gated ion channels, including NaV, CaV, and KV channels. Mutations in these channels can cause Long QT Syndrome (LQTS) which increases the risk for ventricular fibrillation and sudden cardiac death. Polyunsaturated fatty acids (PUFAs) have emerged as potential therapeutics for LQTS because they are modulators of voltage-gated ion channels. Here we demonstrate that PUFA analogues vary in their selectivity for human voltage-gated ion channels involved in the ventricular action potential. The effects of specific PUFA analogues range from selective for a specific ion channel to broadly modulating cardiac ion channels from all three families (NaV, CaV, and KV). In addition, a PUFA analogue selective for the cardiac IKs channel (Kv7.1/KCNE1) is effective in shortening the cardiac action potential in human-induced pluripotent stem cell-derived cardiomyocytes. Our data suggest that PUFA analogues could potentially be developed as therapeutics for LQTS and cardiac arrhythmia.

PubMed ID: 32207683
PMC ID: PMC7159882
Article link: Elife
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: cav1 kcne1 kcnh2 nav1

Disease Ontology terms: long QT syndrome
OMIMs: VENTRICULAR ARRHYTHMIAS DUE TO CARDIAC RYANODINE RECEPTOR CALCIUM RELEASE DEFICIENCY SYNDROME; VACRDS

Article Images: [+] show captions
References [+] :
Ahern, The hitchhiker's guide to the voltage-gated sodium channel galaxy. 2016, Pubmed