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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | May, W. S. Cuatrecasas, P. Lapetina, E. G. |
| Abstract | The effect of the synthetic diacylglycerol, sn-1,2-dioctanoylglycerol (diC8), on the expression of the surface transferrin receptor reveals that exogenous diC8 can act as an intracellular activator of protein kinase C and stimulate both down-regulation and increased receptor phosphorylation in a manner similar to that induced by the active tumor promotor, 4 beta-phorbol 12,13-dibutyrate. Unlike the spontaneously irreversible effect noted when 4 beta-phorbol 12, 13-dibutyrate is added, this same effect mediated by diC8 is brief, lasting only minutes, and is spontaneously reversible. The rate of reversibility is dependent on the concentration of diC8 added, and it is associated with rapid formation of a newly detected intracellular phospholipid that corresponds to sn-1,2-dioctanoyl phosphatidic acid. These data, in conjunction with findings that demonstrate that exogenous diacylglycerols (including diC8) when added to cells do not stimulate cellular phospholipase A2 or C, argue that protein kinase C is activated only briefly in this system since exogenous diC8 is subject to rapid intracellular metabolism to phosphatidic acid. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 83 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1986-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Diglycerides Pharmacology Glycerides Phosphatidic Acids Physiology Protein Kinase C Metabolism Receptors, Cell Surface Calcimycin Drug Synergism Enzyme Activation Drug Effects Phosphorylation Receptors, Transferrin Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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