首页> 外文期刊>American Journal of Physiology >Is reduced SERCA2a expression detrimental or beneficial to postischemic cardiac function and injury? Evidence from heterozygous SERCA2a knockout mice
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Is reduced SERCA2a expression detrimental or beneficial to postischemic cardiac function and injury? Evidence from heterozygous SERCA2a knockout mice

机译:降低的SERCA2a表达对缺血后心脏功能和损伤有害还是有益?来自杂合SERCA2a基因敲除小鼠的证据

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摘要

Acute myocardial ischemia-reperfusion (I/R) injury is associated with contractile dysfunction, arrhythmias, myocardial infarction, and sudden death (5). Several studies suggest that intracellular Ca~(2+) overload with reduced expression and/or activity of SERCA2a plays a prominent role in myocardial I/R injury (29, 35,44). High levels of oxygen-derived free radicals are generated during myocardial I/R and have been shown to damage SERCA2a, potentially contributing to cellular Ca~(2+) overload and myocardial injury (19, 22, 48, 49). Thus cytosolic free Ca~(2+) overload and oxidative stress, either independently or cooperatively, are major contributors to I/R-induced injury.
机译:急性心肌缺血-再灌注(I / R)损伤与收缩功能障碍,心律不齐,心肌梗塞和猝死相关(5)。数项研究表明,细胞内Ca〜(2+)超载,SERCA2a表达和/或活性降低在心肌I / R损伤中起重要作用(29,35,44)。心肌I / R过程中会产生大量的氧衍生自由基,并已证明它们会损伤SERCA2a,从而可能导致细胞Ca〜(2+)超负荷和心肌损伤(19,22,48,49)。因此,无论是单独还是协同作用,无胞质的Ca〜(2+)超负荷和氧化应激是I / R诱导损伤的主要因素。

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