期刊
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
卷 61, 期 -, 页码 20-27出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.yjmcc.2013.05.010
关键词
Heart failure; Mitochondria; Calcium; Sodium; Redox; Reactive oxygen species
资金
- Deutsche Forschungsgemeinschaft [SFB-894, KFO-196]
In heart failure, alterations of excitation-contraction underlie contractile dysfunction. One important defect is an elevation of the intracellular Na+ concentration in cardiac myocytes ([Na+](i)), which has an important impact on cytosolic and mitochondrial Ca2+ homeostasis. While elevated [Na+](i) is thought to compensate for decreased Ca2+ load of the sarcoplasmic reticulum (SR), it yet negatively affects energy supply-and-demand matching and can even induce mitochondrial oxidative stress. Here, we review the mechanisms underlying these pathophysiological changes. The chain of events may constitute a vicious cycle of ion dysregulation, oxidative stress and energetic deficit resembling characteristic cellular deficits that are considered key hallmarks of the failing heart. This article is part of a Special Issue entitled Na+ Regulation in Cardiac Myocytes. (C) 2013 Elsevier Ltd. All rights reserved.
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