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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Weber, J. A. Ross, R. Schettler, G. Dresel, H. A. Stoehr, M. Habenicht, A. J. Goerig, M. Glomset, J. A. |
| Abstract | We studied the effects of human plasma lipoproteins on the synthesis of prostaglandin (PG) E2 in Swiss 3T3 mouse fibroblasts. Quiescent cells, maintained in medium deficient in both platelet-derived growth factor (PDGF) and lipoproteins, synthesized less than 8 ng of PGE2 per 10(6) cells per 22 hr, and this rate did not change in response to the addition of lipoproteins. In contrast, PDGF-stimulated cells, incubated in medium deficient in lipoproteins, synthesized 45-110 ng of PGE2 per 10(6) cells during the same period of time, and this rate increased 2- to 5-fold in the presence of added low density lipoproteins (LDL). This stimulatory effect of LDL seemed to depend on LDL receptor-mediated binding, uptake, and degradation of the lipoproteins because: both LDL and very low density lipoproteins were active, whereas high density lipoproteins were not; low concentrations of LDL were effective; the effect of native LDL was blocked by acetylation of the LDL; PDGF increased both the expression of LDL receptors and the cellular uptake of LDL; chloroquine blocked the effect of LDL but not that of exogenous arachidonic acid. These results provide evidence that the LDL pathway is critically linked to PG synthesis in PDGF-stimulated cells. |
| 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 | Lipoproteins, LDL Platelet-Derived Growth Factor Pharmacology Prostaglandins Biosynthesis Receptors, LDL Physiology Acetylation Animals Arachidonic Acid Arachidonic Acids Cell Line Chloroquine Dinoprostone Endocytosis Drug Effects Kinetics Metabolism Lipoproteins, VLDL Lysosomes Mice Prostaglandins E Structure-Activity Relationship Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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