Referenced in: none

Automatically associated channels: TRP

Title: Protection of coronary endothelial function during cardiac surgery: potential of targeting endothelial ion channels in cardioprotection.

Authors: Qin Yang, Cheuk-Man Yu, Guo-Wei He, Malcolm John Underwood

Journal, date & volume: Biomed Res Int, 2014 , 2014, 324364

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/25126553

Abstract
Vascular endothelium plays a critical role in the control of blood flow by producing vasoactive factors to regulate vascular tone. Ion channels, in particular, K(+) channels and Ca(2+)-permeable channels in endothelial cells, are essential to the production and function of endothelium-derived vasoactive factors. Impairment of coronary endothelial function occurs in open heart surgery that may result in reduction of coronary blood flow and thus in an inadequate myocardial perfusion. Hyperkalemic exposure and concurrent ischemia-reperfusion during cardioplegic intervention compromise NO and EDHF-mediated function and the impairment involves alterations of K(+) channels, that is, KATP and KCa, and Ca(2+)-permeable TRP channels in endothelial cells. Pharmacological modulation of these channels during ischemia-reperfusion and hyperkalemic exposure show promising results on the preservation of NO and EDHF-mediated endothelial function, which suggests the potential of targeting endothelial K(+) and TRP channels for myocardial protection during cardiac surgery.