| Literature DB >> 33411079 |
Mu Chen1, Yudong Fei1, Tai-Zhong Chen1, Yi-Gang Li1, Peng-Sheng Chen2.
Abstract
Apamin-sensitive small-conductance calcium-activated potassium (SK) current (IKAS) plays an important role in cardiac repolarization under a variety of physiological and pathological conditions. The regulation of cardiac IKAS relies on SK channel expression, intracellular Ca2+, and interaction between SK channel and intracellular Ca2+. IKAS activation participates in multiple types of arrhythmias, including atrial fibrillation, ventricular tachyarrhythmias, and automaticity and conduction abnormality. Recently, sex dimorphisms in autonomic control have been noticed in IKAS activation, resulting in sex-differentiated action potential morphology and arrhythmogenesis. This review provides an update on the Ca2+-dependent regulation of cardiac IKAS and the role of IKAS on arrhythmias, with a special focus on sex differences in IKAS activation. We propose that sex dimorphism in autonomic control of IKAS may play a role in J wave syndrome.Entities:
Keywords: Autonomic control; Brugada syndrome; Early repolarization; Ion channel; J wave syndrome; Sex difference; Sex dimorphism
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Year: 2021 PMID: 33411079 PMCID: PMC8855337 DOI: 10.1007/s00424-020-02500-3
Source DB: PubMed Journal: Pflugers Arch ISSN: 0031-6768 Impact factor: 3.657