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- W2026410229 abstract "Although synthetic analogs of alkylglycerol (AG), such as dodecylglycerol, possess potent biological activities, their mechanism of action has not been determined. We recently detected substantial amounts of AG in unstimulated MDCK cells (Warne, T.R. and Robinson, M. (1991) Anal. Biochem. 198, 302-307) raising the possibility that the endogenous compound may act as a biological mediator. In this study, we examined the effects of synthetic AG on the release of arachidonic acid and arachidonate metabolites (AA) from Madin Darby canine kidney (MDCK) cells in response to 12-O-tetradecanoylphorbol-13-acetate (TPA) in order to characterize its effects on this signalling pathway. Treatment of MDCK with AG potently inhibited the release of AA during subsequent stimulation with TPA. Dodecylglycerol, the most effective of a series of alkyglycerols tested, was active at concentrations as low as 3 microM. The sn-1 and sn-3 forms of AG were found to be equally potent inhibitors. The effects of AG on AA release were not the result of arachidonic acid redistribution among cellular lipids and were independent of the phospholipid source of the released AA. AG did not inhibit the release of AA from MDCK cells when bradykinin was used as a stimulus, indicating selectivity for the effects produced by phorbol esters. These results show that AG can function as a potent and specific inhibitor of TPA-mediated AA release. The ability of AG to regulate this signalling pathway in intact MDCK cells, together with its natural occurrence, suggests a potential bioregulatory role for the endogenous compound as an inhibitor of protein kinase C." @default.
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- W2026410229 date "1995-02-01" @default.
- W2026410229 modified "2023-10-18" @default.
- W2026410229 title "Inhibition of phorbol ester-stimulated arachidonic acid release by alkylglycerols" @default.
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- W2026410229 doi "https://doi.org/10.1016/0005-2760(94)00200-i" @default.
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