title: How can we inhibit 5-HT-induced platelet aggregation and why should we bother?
abstract: Different 5-HT receptor antagonists inhibit 5-HT-induced platelet aggregation with different potencies. The inhibitory effects of seven relatively potent antagonists could not be surmounted by increasing the concentration of 5-HT, but the inhibitory effects of seven less potent antagonists could be surmounted by 5-HT. Verapamil has in insurmountable inhibitory effect on 5-HT-induced aggregation at relatively low concentrations. Amlodipine is a very weak inhibitory of 5-HT-induced aggregation. Verapamil is more effective as an inhibitory of 5-HT-induced aggregation than it is of aggregation induced by PAF, adrenaline or ADP. The platelet aggregation obtained in whole blood in response to 5-HT, PAF, U46619 or ADP is not different in patients with peripheral vascular disease and age-sex matched controls.
authors: Department of Medicine, University Hospital, Queen's Medical Centre, Nottingham U.K.
authors: S
authors: S
authors: Heptinstall
authors: J
authors: J
authors: Bevan
mesh_terms: D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; D000244:Adenosine Diphosphate / Q000502:physiology; D017311:Amlodipine; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000031:analogs & derivatives / Q000494:pharmacology; D010972:Platelet Activating Factor / Q000494:pharmacology; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D011450:Prostaglandin Endoperoxides, Synthetic / Q000494:pharmacology; D012702:Serotonin Antagonists / Q000494:pharmacology*; D014700:Verapamil / Q000494:pharmacology
chemical_list: D010972:Platelet Activating Factor; D010975:Platelet Aggregation Inhibitors; D011450:Prostaglandin Endoperoxides, Synthetic; D012702:Serotonin Antagonists; D017311:Amlodipine; D000244:Adenosine Diphosphate; D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; D014700:Verapamil; D009543:Nifedipine