title: 13-Hydroxyoctadeca-9,11-dienoic acid (13-HODE) inhibits thromboxane A2 synthesis, and stimulates 12-HETE production in human platelets.
abstract: The effect of 13-hydroxyoctadeca-9,11-dienoic acid (13-HODE), a major lipoxygenase product of endothelial cell linoleic acid metabolism on thrombin-induced platelet thromboxane B2 (TxB2), and 12-hydroxyeico-satetraenoic acid (12-HETE) production was evaluated. 13-HODE inhibited thrombin-induced TxB2 production in human platelets in a concentration-dependent manner. At concentrations of 10 and 30 microM, 13-HODE inhibited TxB2 production by 28 +/- 8% (1SE, n = 5; P less than 0.05) and 48 +/- 6% (P less than 0.01) respectively. 13-HODE (30 microM) also inhibited the production of platelet hydroxyheptadecatrienoic acid (38 +/- 5%, P less than 0.01). A concomitant stimulation of 12-HETE production by 13-HODE was observed (25 +/- 5% and 49 +/- 22% over control values at 10 and 30 microM respectively, P less than 0.01). Our results demonstrate a differential effect of 13-HODE on thrombin stimulated platelet cyclooxygenase and lipoxygenase metabolites.
mesh_terms: D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid; D000328:Adult; D000991:Antithrombins / Q000494:pharmacology; D016718:Arachidonic Acid; D001095:Arachidonic Acids / Q000097:blood; D001792:Blood Platelets / Q000187:drug effects / Q000378:metabolism*; D006801:Humans; D006893:Hydroxyeicosatetraenoic Acids / Q000096:biosynthesis / Q000097:blood*; D007700:Kinetics; D008041:Linoleic Acids / Q000494:pharmacology*; D010743:Phospholipids / Q000096:biosynthesis / Q000097:blood; D010974:Platelet Aggregation; D013929:Thromboxane B2 / Q000096:biosynthesis / Q000097:blood*
chemical_list: D000991:Antithrombins; D001095:Arachidonic Acids; D006893:Hydroxyeicosatetraenoic Acids; D008041:Linoleic Acids; D010743:Phospholipids; D016718:Arachidonic Acid; C024348:13-hydroxy-9,11-octadecadienoic acid; D013929:Thromboxane B2; D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid