Chronic Ethanol Reduces Immunologically Detectable Gqα/11α in NG108–15 Cells
Williams, R. J. and Kelly, E., 1993. Chronic Ethanol Reduces Immunologically Detectable Gqα/11α in NG108–15 Cells. Journal of Neurochemistry, 61 (3), pp. 1163-1166.
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Recent work has shown that chronic ethanol treatment inhibits receptor-stimulated phosphoinositide hydrolysis in NG108-15 cells and that ethanol exerts this effect primarily at the level of the guanine-nucleotide binding protein (G protein). Here we investigated the effects of ethanol exposure on the expression of Gq alpha/11 alpha, two highly homologous G protein alpha-subunits that have been implicated as regulators of phosphoinositidase C. Addition of ethanol (10-200 mM) to the culture medium for 48 h caused a concentration-dependent decrease in the immunologically detectable levels of Gq alpha/11 alpha. A small (approximately 15%) reduction in Gq alpha/11 alpha was observed after only 6 h of exposure to 200 mM ethanol, but membrane levels were reduced by 31% at 48 h. The ethanol-induced loss of Gq alpha/11 alpha was apparently independent of factors present in the foetal calf serum component of the culture medium. These results suggests that the decrease in receptor-mediated phosphoinositide hydrolysis following chronic ethanol treatment of NG108-15 cells may be mediated in part by a reduction in the membrane levels of Gq alpha/11 alpha.
|Creators||Williams, R. J.and Kelly, E.|
|Departments||Faculty of Science > Biology & Biochemistry|
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