Do age-associated changes of voltage-gated sodium channel isoforms expressed in the mammalian heart predispose the elderly to atrial fibrillation?
作者机构：Department of Cardiothoracic SurgeryHull University Teaching HospitalsCottingham HU165JQUnited Kingdom Department of Biomedical SciencesUniversity of HullHull HU67RXUnited Kingdom
出 版 物：《World Journal of Cardiology》 (世界心脏病学杂志（英文版）（电子版）)
年 卷 期：2020年第12卷第4期
页 面：123-135页
学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学]
主 题：Voltage-gated Sodium channels Ageing Atrial fibrillation Nav1.5 Nav1.8 Late sodium current Cardiac electrophysiology
摘 要：Atrial fibrillation(AF)is the most common cardiac arrhythmia *** prevalence of the disease increases with age,strongly implying an age-related process underlying the *** a time when people are living longer than ever before,an exponential increase in disease prevalence is predicted *** unraveling the underlying mechanics of the disease is paramount for the development of innovative treatment and prevention *** role of voltage-gated sodium channels is fundamental in cardiac electrophysiology and may provide novel insights into the arrhythmogenesis of ***_v1.5 is the predominant cardiac isoform,responsible for the action potential *** studies have demonstrated that Na_v1.8(an isoform predominantly expressed within the peripheral nervous system)is responsible for cellular arrhythmogenesis through the enhancement of pro-arrhythmogenic *** studies have shown a decline in Na_v1.5 leading to a diminished action potential upstroke during phase ***,the study of human tissue demonstrates an inverse expression of sodium channel isoforms;reduction of Na_v1.5 and increase of Na_v1.8 in both heart failure and ventricular *** strongly suggests that the expression of voltage-gated sodium channels play a crucial role in the development of arrhythmias in the diseased *** aberrant sodium currents has led to novel therapeutic approaches in tackling AF and continues to be an area of emerging *** review will explore how voltage-gated sodium channels may predispose the elderly heart to AF through the examination of laboratory and clinical based evidence.
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