Flavonol Glycosides from the Aerial Parts of Indigofera hirsuta and Anti-inflammatory Activity of n-butanol Fraction.

Aims: The study aimed to phytochemically investigate the n-butanol soluble fraction of Indigofera hirsuta aerial parts and to evaluate the anti-inflammatory activity of the fraction using laboratory animal models. Study Design: Isolation and elucidation of the bioactive compounds and antiinflammatory activity investigation on n-butanol soluble fraction. Place and Duration of Study: Department of Pharmaceutical and Medicinal Chemistry, Ahmadu Bello University, Zaria - Nigeria. The study was completed between January-October, 2011. Methodology: The compounds isolated were identified using different spectroscopic techniques. The n-butanol fraction was investigated for its effect on carrageenan-induced oedema in rat’s experimental model. Results: Two Flavonol glycosides were isolated; Kaempferol-3-O-β-D-glucopyranoside (T2) and Kaempferol-7-O-β-D-glucopyranoside (Q3).The fraction significantly (P = .05) inhibited the carrageenan-induced paw oedema at doses of 150 and 300 mg/kg tested. The percentage anti-inflammatory effect of the highest dose tested (300 mg/kg) at the peak hour was higher than that of ketoprofen (10 mg/kg), the standard anti-inflammatory agent. Conclusion: The result of this research suggests that the n-butanol soluble fraction of Indigofera hirsuta aerial parts contains bioactive compounds with anti-inflammatory activity.

Flavonol glycosides found in hydroethanolic extracts from Tilia cordata, a species utilized as anxiolytics / Flavonóides glicosídeos encontrados no extrato hidroalcoólico de Tilia cordata, espécie usada como ansiolítico

Tilia species, among which is Tilia cordata Mill. (Tiliaceae), have been used in folk medicine as anxiolytic. The hydroethanolic extract was analyzed by using liquid chromatography with mass spectrometry HPLC-DAD-ESI-MS/MS in negative ion mode, and its chemical composition was compared to flavonoids reported as anxiolytics. The major flavonoids found were: quercetin-3,7-di-O-rhamnoside, kaempferol-3,7-di-O-rhamnoside and kaempferol 3-O-(6"-p-coumaroyl glucoside) or tiliroside. The anxiolytic activity of the genus Tilia has been attributed to the presence of quercetin and kaempferol derivatives, while the anxiolytic activity of T. americana var. Mexicana was attributed to tiliroside, which was also found among the major constituents of this species.

As espécies de Tilia, entre elas, a Tilia cordata Mill. (Tiliaceae) são utilizadas como ansiolíticas na medicina popular. O extrato hidroalcoólico foi analisado usando cromatografia líquida acoplada à espectrometria de massas HPLC-DAD-ESI/MS/MS no modo negativo e a sua composição química foi comparada com os flavonóides já reportados como ansiolíticos. Os principais flavonóides encontrados foram: quercetina-3,7-di-O-rhamnosideo, canferol-3,7-di-O-rhamnosideo, e canferol 3-O-(6"-p-cumaroil glucosideo) ou tilirosideo. A atividade ansiolítica do gênero Tília tem sido atribuída à presença de derivados de canferol e quercetina, enquanto que a atividade ansiolítica da T. americana var. Mexicana foi atribuída ao tilirosideo, o qual também foi encontrado entre os principais constituintes desta espécie.