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- W2004698921 abstract "We examined whether and how pretreatment with carbon monoxide (CO) prevents apoptosis of cardioblastic H9c2 cells in ischemia-reperfusion. Reperfusion (6 h) following brief ischemia (10 min) induced cytochrome c release, activation of caspase-9 and caspase-3, and apoptotic nuclear condensation. Brief CO pretreatment (10 min) or a caspase-9 inhibitor (Z-LEHD-FMK) attenuated these apoptotic changes. Ischemia-reperfusion increased phosphorylation of Akt at Ser472/473/474, and this was enhanced by CO pretreatment. A specific Akt inhibitor (API-2) blunted the anti-apoptotic effects of CO in reperfusion. In normoxic cells, CO enhanced O2(-) generation, which was inhibited by a mitochondrial complex III inhibitor (antimycin A) but not by a NADH oxidase inhibitor (apocynin). The CO-enhanced Akt phosphorylation was suppressed by an O2(-) scavenger (Tiron), catalase or a superoxide dismutase (SOD) inhibitor (DETC). These results suggest that CO pretreatment induces mitochondrial generation of O2(-), which is then converted by SOD to H2O2, and subsequent Akt activation by H2O2 attenuates apoptosis in ischemia-reperfusion." @default.
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- W2004698921 date "2010-03-01" @default.
- W2004698921 modified "2023-10-01" @default.
- W2004698921 title "Brief exposure to carbon monoxide preconditions cardiomyogenic cells against apoptosis in ischemia–reperfusion" @default.
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- W2004698921 doi "https://doi.org/10.1016/j.bbrc.2010.02.017" @default.
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