title: Differential inhibitory effects of vitamin E and other antioxidants on prostaglandin synthetase, platelet aggregation and lipoxidase.
abstract: Prostaglandin biosynthesis from eicosa-8,11,14-trienoic acid in microsomes from the bovine vesicular gland is inhibited by the antioxidants alpha-naphthol. guaiacol, NDGA and propyl gallate. Prostaglandin biosynthesis in this system is not inhibited by the antioxidants BHT, DL-alpha-tocopherol and Trolox C. Arachidonic acid induced platelet aggregation is inhibited by specifically by alpha-naphthol. guaiacol, NDGA and propyl gallate. Both arachidonic acid induced platelet aggregation and ADP induced platelet aggregation are inhibited non-specifically by the antioxidants BHT, DL-alpha-tocopherol and Trolox C. All antioxidants tested in this study inhibit soybean lipoxidase. Thus alpha-naphthol, NDGA and propyl gallate are non-specific inhibitors of both prostaglandin synthetase and soybean lipoxidase while BHT, DL-alpha-tocopherol and Trolox C are specific inhibitors of soybean lipoxidase alone.
mesh_terms: D000244:Adenosine Diphosphate / Q000037:antagonists & inhibitors / Q000494:pharmacology; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D001095:Arachidonic Acids / Q000037:antagonists & inhibitors / Q000494:pharmacology; D002417:Cattle; D008084:Lipoxygenase / Q000378:metabolism*; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D010974:Platelet Aggregation / Q000187:drug effects*; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism*; D011453:Prostaglandins / Q000096:biosynthesis; D013025:Glycine max; D014810:Vitamin E / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001095:Arachidonic Acids; D011453:Prostaglandins; D014810:Vitamin E; D000244:Adenosine Diphosphate; D006899:Mixed Function Oxygenases; D008084:Lipoxygenase; D011451:Prostaglandin-Endoperoxide Synthases