title: The effect of 7-oxa-13 prostynoic acid on the mechanism of action of bradykinin in human synovial fibroblasts.
abstract: Bradykinin, a potent inflammatory mediator, induces an increment in intracellular cyclic AMP concentrations of human synovial fibroblasts and evokes the synthesis and release of 3H-arachidonic acid and 3H-E prostaglandins from these cells pre-labeled in their phospholipids. Fetal calf serum in the media also stimulates the synthesis and release of these labeled lipids from pre-labeled human synovial fibroblasts and potentiates the bradykinin-induced cyclic AMP response. The PGE1 analogue, 7-oxa-13 prostynoic acid, completely abrogates both the bradykinin-induced cyclic AMP response and the bradykinin- and fetal calf serum-evoked release of labeled E-prostaglandins from pre-labeled cells. In serum-free media, the prostaglandin antagonist stimulated the release of 3H-arachidonic acid from pre-labeled human synovial fibroblasts and did not inhibit the bradykinin-induced release of this lipid.
mesh_terms: D001095:Arachidonic Acids / Q000378:metabolism; D001920:Bradykinin / Q000494:pharmacology*; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism; D005231:Fatty Acids, Unsaturated / Q000494:pharmacology*; D005312:Fetal Blood / Q000032:analysis; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism; D011453:Prostaglandins / Q000378:metabolism; D013583:Synovial Membrane / Q000166:cytology / Q000378:metabolism*
chemical_list: D001095:Arachidonic Acids; D005231:Fatty Acids, Unsaturated; D011453:Prostaglandins; D000242:Cyclic AMP; D011451:Prostaglandin-Endoperoxide Synthases; D001920:Bradykinin