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- W2026588075 abstract "Our previous studies revealed that cardioplegia-induced cardiac arrest under cardiopulmonary bypass (CPB) decreased cardiomyocytic nitric oxide and increased apoptosis. We hypothesized that pretreatment with bradykinin (BK) would improve the profile of anti-apoptotic proteins and inhibit cardiomyocytic apoptosis.New Zealand white rabbits received total CPB. Rabbits were weaned from CPB and reperfused for 4 h. Blood was sampled at various time points. Bradykinin and/or nitric oxide synthase (NOS) inhibitors or BK-receptor antagonists were infused systemically 30 min before beginning of CPB, and continued throughout the procedure. The ascending aorta was cross-clamped for 60 min while cold crystalloid cardioplegic solution was intermittently infused into the aortic root. The hearts were harvested and studied for evidence of apoptosis and ischemia/reperfusion induced inflammation-related cytokine production by cardiomyocytes.Our results revealed that bradykinin supplementation during cardioplegia could prevent I/R-induced inflammatory and apoptotic effects, which could be reversed with a NOS inhibitor. BK antagonists and NOS inhibitors worsened the inflammatory and apoptotic responses of cardiomyocytes, which could be reversed with an exogenous NO donor.Restoring the NO concentration after cardioplegia-induced cardiac arrest (CCA) under CPB with bradykinin could modulate (1) the nuclear translocation of NF-kappaB, (2) the plasma levels of inflammation-related cytokines, (3) the Bcl-2/Bax ratio, and (4) the occurrence of apoptosis. Exogenous bradykinin administration was associated with the myocardial apoptotic response by inhibition of NF-kappaB translocation, inflammatory cytokine production, Akt activation, and elevation of the Bcl-2/Bax ratio via a NO-mediated pathway." @default.
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- W2026588075 date "2010-09-01" @default.
- W2026588075 modified "2023-09-24" @default.
- W2026588075 title "Cardiomyocytic Apoptosis Limited by Bradykinin via Restoration of Nitric Oxide after Cardioplegic Arrest" @default.
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- W2026588075 doi "https://doi.org/10.1016/j.jss.2010.04.005" @default.
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