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- Tamara Zaobornyj
- Laboratory of Free Radical Biology, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina; and
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- Pedram Ghafourifar
- Tri-State Institute of Pharmaceutical Sciences, Huntington, West Virginia
説明
<jats:p>Heart mitochondria play a central role in cell energy provision and in signaling. Nitric oxide (NO) is a free radical with primary regulatory functions in the heart and involved in a broad array of key processes in cardiac metabolism. Specific NO synthase (NOS) isoforms are confined to distinct locations in cardiomyocytes. The present article reviews the chemical reactions through which NO interacts with biomolecules and exerts some of its crucial roles. Specifically, the article discusses the reactions of NO with mitochondrial targets and the subcellular localization of NOS within the myocardium and analyzes the available data about heart mitochondrial NOS activity and identity. The article also describes the regulation of heart mtNOS by the distinctive mitochondrial environment by showing the effects of Ca<jats:sup>2+</jats:sup>, O<jats:sub>2</jats:sub>, l-arginine, mitochondrial transmembrane potential, and the metabolic states on heart mitochondrial NO production. The article depicts the effects of NO on heart function and highlights the relevance of NO production within mitochondria. Finally, the evidence on the functional implications of heart mitochondrial NOS is delineated with emphasis on chronic hypoxia and ischemia-reperfusion studies.</jats:p>
収録刊行物
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- American Journal of Physiology-Heart and Circulatory Physiology
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American Journal of Physiology-Heart and Circulatory Physiology 303 (11), H1283-H1293, 2012-12-01
American Physiological Society