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- W4253329884 abstract "Summary: We assessed whether local inhibition of myocardial converting enzyme by captopril and zofenopril reduces the functional and metabolic damage caused by ischemia and reperfusion. First we investigated the effects of zofenopril and captopril on the mechanical function, cellular redox state, and norepinephrine (NE) content of isolated and aerobically perfused rabbit hearts. Both drugs failed to modify the myocardial redox state. At concentrations >10-6M, zofenopril, but not captopril, caused a reduction in myocardial NE content. At 10-4M, both drugs caused a reduction in developed pressure and an increase in diastolic pressure and release of creatine phosphokinase (CPK). Second we investigated their effects on ischemic and reperfused myocardium. Both drugs exerted a cardioprotection; zofenopril was always more potent than captopril. Recovery of developed pressure on reperfusion improved, and peak release of NE was reduced, as was release of CPK. Calcium homeostasis and mitochondrial function were maintained. Captopril had no effect on occurrence of oxidative stress during reperfusion, whereas zofenopril reduced it. In hearts treated with the converting enzyme inhibitors, peak release of NE was correlated to mitochondrial calcium content, production of ATP, and recovery of mechanical function on reperfusion. These data suggest that the cardioprotective effect of zofenopril and captopril is independent of hemodynamic changes or reduction of the toxicity of oxygen free radicals and that it could be related to a reduction in release of NE" @default.
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- W4253329884 date "1992-11-01" @default.
- W4253329884 modified "2023-09-26" @default.
- W4253329884 title "Protection of the Ischemic Myocardium by the Converting-Enzyme Inhibitor Zofenopril: Insight Into Its Mechanism of Action" @default.
- W4253329884 doi "https://doi.org/10.1097/00005344-199211000-00003" @default.
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