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- W1979858340 abstract "Phospholipid catabolism is thought to be one of the critical events in membrane injury during heart ischemia. In this work, the enzymes involved in phospholipid metabolism were studied in purified cultured ventricular myocytes in normoxic and hypoxic conditions. Purified ventricular myocytes exhibited an alkaline phospholipase A activity which had sn-2 specificity and which was calcium dependent, and an acid phospholipase A activity with sn-1 specificity. These cells also exhibited lysophospholipase and acyl-CoA/lysophosphatidylcholine acyltransferase activities. Oxygen deprivation of the myocardial cells for 4 h resulted in a sharp reduction of both phospholipase A2 and A1 activities. The activities of the other lipolytic enzymes were unaffected by hypoxia. Although hypoxia resulted in a marked increase of lactate dehydrogenase leakage in the bathing fluid, no additional release of the lipolytic enzymes and mitochondrial enzyme was observed. However, we noted an important alkaline phospholipase A2 leakage during normoxia. It is suggested that ventricular myocytes, under hypoxia, tend to prevent phospholipid degradation by reducing their phospholipase A activities." @default.
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- W1979858340 date "1988-01-01" @default.
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- W1979858340 title "Activities of some enzymes of phospholipid metabolism in cultured rat ventricular myocytes in normoxic and hypoxic conditions" @default.
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- W1979858340 doi "https://doi.org/10.1016/0005-2760(88)90242-1" @default.
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