title: Some aspects of the inhibitory activity of hypolaetin-8-glucoside in acute inflammation.
abstract: Hypolaetin-8-glucoside (H-8-G) has been examined for its mode of action in several models of acute inflammation. Its anti-inflammatory activity in carrageenan-induced inflammation of the rat hind-paw is not affected either by adrenalectomy or by phentolamine given with propranolol. H-8-G and its aglycone, hypolaetin, did not antagonize the actions of histamine, 5-hydroxytryptamine (5-HT), bradykinin or prostaglandin E2 (PGE2) on various smooth muscle preparations in-vitro, but protected erythrocytes from heat-induced lysis. The glycoside was more potent than troxerutin on capillary permeability increased by histamine and exerted inhibitory effects on protein exudation, leucocyte migration and beta-glucuronidase activity in the carrageenan air pouch, thereby showing some difference from indomethacin. These results are discussed in relation to the features of non-steroidal anti-inflammatory drugs (NSAID) and flavonoid anti-inflammatory actions.
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D002199:Capillary Permeability / Q000187:drug effects; D005260:Female; D005419:Flavonoids / Q000494:pharmacology*; D005966:Glucuronidase / Q000037:antagonists & inhibitors; D006461:Hemolysis / Q000187:drug effects; D006632:Histamine / Q000494:pharmacology; D007213:Indomethacin / Q000494:pharmacology; D007962:Leukocytes / Q000187:drug effects; D008247:Lysosomes / Q000187:drug effects; D010646:Phentolamine / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D005419:Flavonoids; D006632:Histamine; C044475:hypolaetin-8-glucoside; D011433:Propranolol; D005966:Glucuronidase; D007213:Indomethacin; D010646:Phentolamine