title: Antihyperuricemic lignans from the leaves of Phyllanthus niruri.
abstract: The methanol extract from the leaves of Phyllanthus niruri L. showed oral antihyperuricemic activity in potassium oxonate- and uric acid-induced hyperuricemic rats. Fractionation of the extract by resin chromatography led to the isolation of a less polar fraction which exhibited the highest reduction of plasma uric acid. Further antihyperuricemic-guided purification of the fraction afforded three lignans, phyllanthin (1), hypophyllanthin (2) and phyltetralin (3), of which 1 significantly reversed the plasma uric acid level of hyperuricemic animals to its normal level in a dose-dependent manner, comparable to that of allopurinol, benzbromarone and probenecid which are used clinically for the treatment of hyperuricemia and gout. Thus, the lignans of P. niruri are potential antihyperuricemic agents worthy of further investigation.
authors.affiliation: School of Pharmaceutical Sciences, Universiti Sains Malaysia, Malaysia.
authors.forename: Vikneswaran
authors.initials: V
authors.lastname: Murugaiyah
authors.forename: Kit-Lam
authors.initials: KL
authors.lastname: Chan
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D006073:Gout / Q000188:drug therapy; D017705:Lignans / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D008297:Male; D029803:Phyllanthus; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D051381:Rats; D017207:Rats, Sprague-Dawley; D014527:Uric Acid / Q000097:blood*; D014528:Uricosuric Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D017705:Lignans; D010936:Plant Extracts; D014528:Uricosuric Agents; D014527:Uric Acid