Evaluation of the in vivo anti-inflammatory activity of a flavonoid glycoside from Boldoa purpurascens

Abstract The anti-inflammatory effect of 4′,5-dihydroxy-6,7-methylenedioxyflavonol 3- O -α- l -rhamnopyranosyl-(1 → 2)-β- d -xylopyranoside, a constituent of the leaves of Boldoa purpurascens Cav. (Nyctaginaceae), was evaluated for its anti-inflammatory activity in the dextran 1% induced rat paw oedema model (acute inflammation) and the cotton pellet induced granuloma rat model (chronic inflammation). Flavonoid glycoside at doses of 2.5, 5 and 10 mg/kg, indomethacin at a dose of 7 mg/kg and the vehicle were administered orally. The compound showed significant anti-inflammatory activity in the acute phase in a dose dependent manner, most notably at the highest test dose 10 mg/kg. Also in the cotton pellet induced granuloma model, the compound showed a dose-dependent anti-inflammatory activity, with the highest effect at 10 mg/kg. In both assays, the test compound was more active than indomethacin tested at 7 mg/kg.