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- W2113167974 abstract "Reactive oxygen species induce myocardial damage after ischemia and reperfusion in experimental animal models. Numerous studies have investigated the deleterious effects of ischemia-reperfusion (I/R)-induced oxidant production using various pharmacological interventions. More recently, in vitro studies have incorporated gene-targeted mice to decipher the role of antioxidant enzymes in myocardial reperfusion injury. We examined the role of cellular antioxidant enzymes in the pathogenesis of myocardial I/R (MI/R) injury in vivo in gene-targeted mice. Neither deficiency nor overexpression of Cu-Zn superoxide dismutase (SOD) altered the extent of myocardial necrosis. Overexpression of glutathione peroxidase did not affect the degree of myocardial injury. Conversely, overexpression of manganese (Mn)SOD significantly attenuated myocardial necrosis after MI/R. Transthoracic echocardiography was performed on MnSOD-overexpressing and wild-type mice that were subjected to a more prolonged period of reperfusion. Cardiac output was significantly depressed in the nontransgenic but not the transgenic MnSOD-treated mice. Anterior wall motion was significantly impaired in the nontransgenic mice. These findings demonstrate an important role for MnSOD but not Cu/ZnSOD or glutathione peroxidase in mice after in vivo MI/R." @default.
- W2113167974 created "2016-06-24" @default.
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- W2113167974 date "2003-01-01" @default.
- W2113167974 modified "2023-10-15" @default.
- W2113167974 title "Role of intracellular antioxidant enzymes after in vivo myocardial ischemia and reperfusion" @default.
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- W2113167974 doi "https://doi.org/10.1152/ajpheart.00236.2002" @default.
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