title: Effects of anticoagulant from Spirodela polyrhiza in rats.
abstract: A fibrinolytic protease was purified from an Oriental medicinal herb, Spirodela polyrhiza (Choi, H. S., et al., Biosci. Biotechnol. Biochem., 65, 781-786 (2001)). The protease hydrolyzed not only fibrin but also fibrinogen. The enzyme had an anticoagulant activity measured with activated partial thromboplastin time, thrombin time, and prothrombin time in rat plasma. It doubled all three at 69, 29, and 221 nM, respectively. The protein had anticoagulant activity when given intravenously and orally. The maximum delay in the activated partial thromboplastin time was at the dose of 0.52 and 4.2 mg/kg for intravenous and oral administration, respectively. This protein may be useful in clinical applications for anticoagulation.
authors.affiliation: Department of Surgery, Ulsan University Hospital, and Immunomodulation Research Center, University of Ulsan, Ulsan 680-749, Korea.
authors.forename: Hong Rae
authors.initials: HR
authors.lastname: Cho
authors.forename: Hye-Seon
authors.initials: HS
authors.lastname: Choi
mesh_terms: D000818:Animals; D000925:Anticoagulants / Q000008:administration & dosage / Q000494:pharmacology*; D001780:Blood Coagulation Tests; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000494:pharmacology*; D010450:Endopeptidases / Q000378:metabolism / Q000494:pharmacology; D005337:Fibrin / Q000378:metabolism; D005340:Fibrinogen / Q000378:metabolism; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D000925:Anticoagulants; D004365:Drugs, Chinese Herbal; D005337:Fibrin; D005340:Fibrinogen; D010450:Endopeptidases