Marine Drugs | |
Ω3 Supplementation and Intermittent Hypobaric Hypoxia Induce Cardioprotection Enhancing Antioxidant Mechanisms in Adult Rats | |
Emilio A. Herrera2  Jorge G. Fars1  Alejandro González-Candia2  Stefania E. Short1  Catalina Carrasco-Pozo3  Rodrigo L. Castillo2  | |
[1] Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias, Universidad de la Frontera, Temuco 4811230, Chile; E-Mails:;Programa de Fisiopatología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile; E-Mails:;Departamento de Nutrición, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile; E-Mail: | |
关键词: intermittent hypobaric hypoxia; high-altitude; oxidative stress; inflammation; ventricular function; cardiac impairment; ischemia-reperfusion; Ω3 fatty acids; | |
DOI : 10.3390/md13020838 | |
来源: mdpi | |
【 摘 要 】
Intermittent hypobaric hypoxia (IH) is linked with oxidative stress, impairing cardiac function. However, early IH also activate cardio-protective mechanisms. Omega 3 fatty acids (Ω3) induce cardioprotection by reducing infarct size and reinforcing antioxidant defenses. The aim of this work was to determine the combined effects of IH and Ω3 on cardiac function; oxidative balance and inflammatory state. Twenty-eight rats were randomly divided into four groups: normobaric normoxia (N); N + Ω3 (0.3 g·kg−1·day−1); IH; and IH + Ω3. IH was induced by 4 intercalate periods of hypoxia (4 days)—normoxia (4 days) in a hypobaric chamber during 32 days. At the end of the exposure, hearts were mounted in a Langendorff system and subjected to 30 min of ischemia followed by 120 min of reperfusion. In addition, we determined HIF-1α and ATP levels, as well as oxidative stress by malondialdehyde and nitrotyrosine quantification. Further, the expression of the antioxidant enzymes superoxide dismutase, catalase, and glutathione peroxidase was determined. NF-kappaB and myeloperoxidase levels were assessed in the hearts. Relative to N hearts, IH improved left ventricular function (Left ventricular developed pressure: N; 21.8 ± 3.4
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
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