Studies on antioxidant, anti-diabetic and GC-MS analyses of methanol extract of Aristolochia bracteolata root bark

Aristolochia bracteolatais utilized in confronting multiple and complicated disease conditions such as cancer, lung inflammation, dysentery, syphilis, gonorrhea, arthritis, skindiseases, snake bite and oxidative stress relating to humans due to their acceptability, affordability and proximity. This investigation seeks to determine the antioxidant and anti-diabetic effects of methanol extract of A. bracteolate root bark in vitro. The phytochemical screening, antioxidant, and enzymes inhibitory (alpha-amylase and alpha-glucosidase) properties of root bark extract were evaluated by standard procedures. The methanol extract indicated the presence of diverse phytochemicals (tannins, saponins, flavonoids, alkaloids, phenols, glycosides, and terpenoids) and contained a remarkable amount of saponins (8.20 [+ or -] 0.03%), phenols (6.82 [+ or -] 0.01%), alkaloids (4.71 [+ or -] 0.03%), and flavonoids (3.50 [+ or -] 0.12%). The extract showed not only strong antioxidant properties against DPPH, FRAP, and TBARS radicals with [IC.sub.50] value of 57.87, 54.64 and 47.54 mg/ml, respectively but also anti-diabetic activity by inhibiting alpha-amylase ([IC.sub.50] =53.70 mg/ml) and alpha-glucosidase ([IC.sub.50] =49.18 mg/ml). GC-MS chromatogram identified a diverse array of active metabolites in the methanol extract of A. bracteolate root bark. This study suggested that the methanol extract of A. bracteolate root bark possessed anti-oxidative and anti- diabetic activities. Keywords: Antioxidant, phytochemicals, Aristolochia bracteolata, root bark extract, diabetes mellitus.