title: Anti-platelet effects of flavonoids and flavonoid-glycosides from Sophora japonica.
abstract: A methanol extract of Sophora japonica was subjected to anti-platelet activity guided fractionation affording the isolation of four flavonoids and six flavonoid-glycosides: biochanin A (1), irisolidone (2), genistein (3), sissotrin (4), sophorabioside (5), genistin (6), tectoridin (7), apigenin (8), quercitrin (9), and rutin (10). The structure of each compound was determined by a variety of spectroscopic methods. Among the compounds, 1, 3, and 7 showed approximately 2.5-6.5 fold greater inhibitory effects on arachidonic acid (AA) and U46619 induced platelet aggregation (IC50: 19.9 and 99.8 microM; 20.3 and 53.8 microM; 25.9 and 123.4 microM, respectively) than acetylsalicylic acid (ASA, IC50: 63.0 and 350.0 microM). Compound 2 was an approximately 22-40 fold stronger inhibitor than ASA on AA and U46619 induced aggregation (IC50: 1.6 and 15.6 microM, respectively).
authors.affiliation: Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, Korea.
authors.forename: Jeong Mi
authors.initials: JM
authors.lastname: Kim
authors.forename: Hye Sook
authors.initials: HS
authors.lastname: Yun-Choi
mesh_terms: D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid / Q000037:antagonists & inhibitors / Q000494:pharmacology; D000244:Adenosine Diphosphate / Q000037:antagonists & inhibitors / Q000494:pharmacology; D000818:Animals; D016718:Arachidonic Acid / Q000037:antagonists & inhibitors / Q000494:pharmacology; D003094:Collagen / Q000037:antagonists & inhibitors / Q000494:pharmacology; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology*; D005638:Fruit / Q000737:chemistry; D006027:Glycosides / Q000302:isolation & purification / Q000494:pharmacology; D066298:In Vitro Techniques; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010974:Platelet Aggregation / Q000187:drug effects; D010975:Platelet Aggregation Inhibitors; D051381:Rats; D017207:Rats, Sprague-Dawley; D029909:Sophora / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013928:Thromboxane A2 / Q000494:pharmacology
chemical_list: D005419:Flavonoids; D006027:Glycosides; D010975:Platelet Aggregation Inhibitors; D016718:Arachidonic Acid; D013928:Thromboxane A2; D000244:Adenosine Diphosphate; D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; D003094:Collagen