alexa Cardiac-specific expression of heme oxygenase-1 protects against ischemia and reperfusion injury in transgenic mice.
Cardiology

Cardiology

Journal of Clinical & Experimental Cardiology

Author(s): Yet SF, Tian R, Layne MD, Wang ZY, Maemura K,

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Abstract Heme oxygenase (HO)-1 degrades the pro-oxidant heme and generates carbon monoxide and antioxidant bilirubin. We have previously shown that in response to hypoxia, HO-1-null mice develop infarcts in the right ventricle of their hearts and that their cardiomyocytes are damaged by oxidative stress. To test whether HO-1 protects against oxidative injury in the heart, we generated cardiac-specific transgenic mice overexpressing different levels of HO-1. By use of a Langendorff preparation, hearts from transgenic mice showed improved recovery of contractile performance during reperfusion after ischemia in an HO-1 dose-dependent manner. In vivo, myocardial ischemia and reperfusion experiments showed that infarct size was only 14.7\% of the area at risk in transgenic mice compared with 56.5\% in wild-type mice. Hearts from these transgenic animals had reduced inflammatory cell infiltration and oxidative damage. Our data demonstrate that overexpression of HO-1 in the cardiomyocyte protects against ischemia and reperfusion injury, thus improving the recovery of cardiac function.
This article was published in Circ Res and referenced in Journal of Clinical & Experimental Cardiology

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