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- W2086449483 abstract "The report deals with the effect of ischemia and reperfusion on purified sarcolemma obtained from canine myocardium of perfused supported heart preparations. Perfusion was carried out with a perfluorochemical (FC-43). Ischemia was produced by intermittent total clamping of inflow and outflow followed by release until the decrease in dP/dtmax had become stabile. Purity of sarcolemmal vesicles was ascertained with marker enzymes: succinate cytochrome c reductase (for mitochondria), K+-stimulated p-nitrophenylphosphate (K+-pNPPase), (Na+/K+)ATPase and adenylate cyclase (for SL). In addition Na+/Ca2+-exchange characteristics for SL were determined. Sidedness of vesicles was ascertained by means of adenylate cyclase activity using sarcolemmal preparations treated and untreated with alamethicin. Emphasis was placed on ATP-dependent Ca2+ uptake, phosphorylation of sarcolemmal vesicles and yield of SL proteins. Ischemia and reperfusion resulted in a significant reduction in adenylate cyclase activity. This decline was significant following ischemia and reperfusion. The yield of protein recovered from SL vesicles from ischemic-reperfused heart preparations was also significantly decreased. Both initial rate of ATP-dependent Ca2+ uptake and maximal Ca2+ uptake fell significantly following ischemia and reperfusion. The initial rate of phosphorylation also dropped significantly. These disturbances in SL Ca2+ transport following ischemia and reperfusion are probably a part of the general deficit in Ca2+ translocation." @default.
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- W2086449483 date "1985-12-01" @default.
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- W2086449483 title "The effect of ischemia and reperfusion on sarcolemmal function in perfused canine hearts" @default.
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- W2086449483 doi "https://doi.org/10.1016/s0022-2828(85)80110-3" @default.
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