Phorbol Esters Stimulate Phospholipase D Activity in C-6 Glioma Cells
1989
Gustavsson, Lena | Lundqvist, Christofer | Ailing, Christer
The effects of phorbol esters on phospholipase D activity were studied in C-6 glioma cells. The cell lipids were prelabelled with [3H]-glycerol or [14C]-arachidonic acid. Phosphatidylethanol was formed during stimulation with 100nM 12-0-tetradecanoylphorbol-13-acetate (TPA), when ethanol was present in the culture medium. After 30 minutes of stimulation, phosphatidylethanol constituted 2.6% of the [3H]-glycerol-labelled lipids. Stimulating the cells with TPA in the absence of ethanol caused a significant increase in labelled phosphatidic acid. This increase was inhibited by ethanol. The present findings demonstrate that TPA stimulates phospholipase D activity in cultured C-6 glioma cells.
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