title: [Study of Andrographis paniculata extracts on antiplatelet aggregation and release reaction and its mechanism].
abstract: 63 patients of cardiac and cerebral vascular diseases were observed at 3 hours and/or one week after taking Andrographis paniculata (AP) extracts. Results showed that both 1 min. and 5 min. platelet aggregation induced by ADP were significantly inhibited (P < 0.001), 33 cases of them were observed for one week. The aggregation rate was even significantly lower than that of 3 hours. Serotonin (5-HT) release reaction from platelet was observed in 20 volunteers taking AP. Result showed 5-HT released from platelet decreased (P < 0.01), but plasma 5-HT level remained unchanged. The ultrastructural observation showed that AP could inhibit the releasing of dense and alpha agranules from platelet and dilating of canalicular system. It suggested that a raise of platelet cAMP level might be the mechanism of antiplatelet effect of AP.
authors.affiliation: Tongji Hospital, Tongji Medical University, Wuhan.
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Zhang
authors.forename: J Z
authors.initials: JZ
authors.lastname: Tang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001792:Blood Platelets / Q000648:ultrastructure; D002561:Cerebrovascular Disorders / Q000097:blood; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000097:blood; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D012701:Serotonin / Q000097:blood
chemical_list: D004365:Drugs, Chinese Herbal; D010975:Platelet Aggregation Inhibitors; D012701:Serotonin