The chronic and acute effects of ethanol on adenosine triphosphatase activity in cultured astroblast and neuroblastoma cells

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Abstract
Mg2+ATPase and (Na+K+)ATPase activities were measured in clonal line NN hamster astroblasts and in clonal lines M1 and N1E-115 mouse neuroblastoma cells after the cells had been subjected to the acute and chronic actions of 100 mM ethanol. Exposure of the astroblasts to ethanol for periods as long as 68 days produced an increase in total cellular Mg2+ ATPase activity, as measured in cell homogenates; however, activity reverted to control levels upon withdrawal of ethanol. Chronic exposure of clonal line N1E-115 neuroblastoma cells to ethanol produced an increase in Mg2+ATPase and (Na+K+)ATPase activities. In contrast, the activities of both ATPases of clonal line M1 neuroblasts were unaffected by chronic exposure to ethanol. Acute exposure of cell homogenates to 100 mM ethanol inhibited Mg2+ ATPase and (Na+K+)ATPase of astroblasts but not that of neuroblastoma cells. These findings suggest that neural cells in culture may serve as useful models for studying the effects of ethanol on specific cell types.