Abstract

Activation of protein kinase C by phorbol esters caused a time- and dose-dependent stimulation (270% of control) of glucose uptake in cultured glia, but not in neurons from rat brain. The phorbol ester stimulation of V max of glial glucose uptake occurred only in glia despite nearly 2.5-fold greater phorbol ester binding in neurons. These differences in cellular responses to protein kinase C activation may be the key to understanding brain glucose regulation.

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