title: Prostaglandin E1 inhibits DNA synthesis in arterial smooth muscle cells stimulated with platelet-derived growth factor.
abstract: The effect of prostaglandins (PG) on initiation of DNA synthesis in arterial smooth muscle cells (SMC) stimulated with platelet-derived growth factor (PDGF) was examined. A concentration of 10 ng/ml PGE1 inhibited DNA synthesis, measured as autoradiographically labeled nuclei, by about 70%. Similar results were obtained with PGE2 and PGD2 but at concentrations 10-20 times higher, whereas PGF2 alpha lacked effect. The inhibitory action of the prostaglandins was restricted to the first 6 h of the lag phase. Treatment with PGE1 also raised the intracellular concentration of cyclic AMP, indicating that the inhibition may be mediated via changes in the levels of cyclic nucleotides.
mesh_terms: D000527:Alprostadil; D000818:Animals; D001011:Aorta / Q000187:drug effects; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism; D004247:DNA / Q000037:antagonists & inhibitors* / Q000096:biosynthesis; D015232:Dinoprostone; D004305:Dose-Response Relationship, Drug; D009131:Muscle, Smooth, Vascular / Q000187:drug effects*; D010982:Platelet-Derived Growth Factor / Q000494:pharmacology*; D015230:Prostaglandin D2; D011457:Prostaglandins D / Q000494:pharmacology; D011458:Prostaglandins E / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D010982:Platelet-Derived Growth Factor; D011457:Prostaglandins D; D011458:Prostaglandins E; D004247:DNA; D000242:Cyclic AMP; D000527:Alprostadil; D015232:Dinoprostone; D015230:Prostaglandin D2