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- W1981265706 abstract "Multiple cellular responses are regulated through the generation of lipid second messengers upon activation of phospholipases. One such response concerns the activity of a class of kinase constituting the protein kinase C family. The production of specific molecular species of lipid second messengers may be therefore of prime importance in the activation of a member of the PKC isoforms. Prompted by this possibility we investigated the production of 1,2 diacyl-sn-glycerol (DAG) and phosphatidic acid (PtdOH) in LA-N-1 neuroblastoma cells under various physiological states. 12-0-Tetradecanoylphorbol 13-acetate (TPA) stimulation activated a phospholipase D (PLD) specific for phosphatidylcholine (PtdCho) in proliferating cells and a phospholipase C (PLC) specific for phosphatidylethanolamine (PtdEtn) in retinoic acid (RA) differentiated cells. These separate activations produced different molecular species of DAG or PtdOH. PtdOH was able to stimulate the Ca2+ dependent protein kinase C (PKC) by a mechanism which differed from the action of DAG. PtdOH did not induce the translocation of the PKC to the membrane. Moreover PtdOH, in contrast to DAG, prevented PKC degradation by inhibiting the enzymatic hydrolysis by m-calpain. These observations suggest that the stimulation of cells by agonists elicited the production of specific molecular species of lipid second messengers depending on the physiological status of the cells, and probably on the nature of the stimulus. It seems therefore likely that the generation of specific lipid second messengers may activate specific PKC isoforms resulting in a specific cellular response." @default.
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- W1981265706 date "1996-09-01" @default.
- W1981265706 modified "2023-10-16" @default.
- W1981265706 title "Production and function of lipid second messengers in proliferating and differentiated neuroblastoma cells" @default.
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- W1981265706 doi "https://doi.org/10.1016/0929-7855(96)00544-5" @default.
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