title: [The suppressive effect of pyrrole-2-carboxylic acid on platelet aggregation].
abstract: In the course of a search for novel antibiotics, an antiplatelet substance was isolated from the fermentation broth of Streptomyces sp. No. 82-85. Thereafter, the active substance was identified as pyrrole-2-carboxylic acid (P2C) by structural studies. The effects of P2C on adenosine diphosphate (ADP)-, arachidonic acid-, collagen- or tumor cell-induced platelet aggregation were examined in vitro and ex vivo. In in vitro studies, P2C (25-100 micrograms/ml) suppressed the aggregation of platelets of normal Wistar rats. The intraperitoneal administration of P2C (200 mg/kg) to rats and rabbits suppressed platelet aggregation induced by ADP, arachidonic acid and collagen when examined for 0.5-3 hours after administration. The agent also suppressed platelet aggregation induced by both mouse syngenic tumors, Meth-A fibrosarcoma and IMC carcinoma in vitro.
mesh_terms: D000244:Adenosine Diphosphate / Q000037:antagonists & inhibitors; D000818:Animals; D016718:Arachidonic Acid; D001095:Arachidonic Acids / Q000037:antagonists & inhibitors; D003094:Collagen / Q000037:antagonists & inhibitors; D003864:Depression, Chemical; D066298:In Vitro Techniques; D008297:Male; D009374:Neoplasms, Experimental / Q000473:pathology; D010974:Platelet Aggregation / Q000187:drug effects*; D011392:Proline / Q000031:analogs & derivatives* / Q000494:pharmacology; D011817:Rabbits; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D001095:Arachidonic Acids; D016718:Arachidonic Acid; D000244:Adenosine Diphosphate; C002986:2-pyrrolecarboxylic acid; D003094:Collagen; D011392:Proline