IMR Press / FBL / Volume 12 / Issue 4 / DOI: 10.2741/2143

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article
Mitochondrial contribution to the molecular mechanism of heart acclimatization to chronic hypoxia: role of nitric oxide
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1 Laboratory of Free Radical Biology, School of Pharmacy and Biochemistry, University of Buenos Aires, C1113AAD, Buenos Aires, Argentina
2 Institute of High Altitude Research, and Department of Biological and Physiological Sciences, Faculty of Science and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
Academic Editors:Alberto Boveris, Ana Navarro
Front. Biosci. (Landmark Ed) 2007, 12(4), 1247–1259; https://doi.org/10.2741/2143
Published: 1 January 2007
(This article belongs to the Special Issue Mitochondria: physiological function, signaling and oxidative damage)
Abstract

A remarkable number of adaptive responses; including changes in the cardiovascular, respiratory and hematologic systems; takes place during acclimatization to natural or simulated high altitude. This adaptation to chronic hypoxia confers the heart an improved tolerance to all major deleterious consequences of acute O2 deprivation, not only reducing infarct size but also alleviating post-ischemic contractile dysfunction and ventricular arrhythmias. There is growing evidence about the involvement of mitochondria and NO in the establishment of cardioprotection. This review focuses on evidence about the putative role of different effectors of heart acclimatization to chronic hypoxia. Along with classical parameters, we consider NO, specially that generated by mtNOS, mitochondrial respiratory chain, mitoKATP channels, reactive oxygen species and control of gene expression by HIF-1.

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