Antioxidant, xanthine oxidase and lipoxygenase inhibitory activities and phenolics of Bauhinia rufescens Lam. (Caesalpiniaceae)

Nat Prod Res. 2012;26(11):1069-74. doi: 10.1080/14786419.2011.559948. Epub 2011 Oct 6.

Abstract

An aqueous acetone extract of the stem with the leaves of Bauhinia rufescens and its fractions were analysed for their antioxidant and enzyme-inhibitory activities, as well as their phytochemical composition. For measurement of the antioxidant activities, the 2,2-diphenyl-1-picrylhydrazyl, 2,2'-azinobis(3-ethylbenzoline-6-sulphonate) and the ferric-reducing methods were used. The results indicated that the aqueous acetone, its ethyl acetate and n-butanol fractions possessed considerable antioxidant activity. Further, the xanthine oxidase and lipoxygenase inhibitory assays showed that the n-butanol fraction possessed compounds that can inhibit both these enzymes. In the phytochemical analysis, the ethyl acetate and the n-butanol fractions of the aqueous acetone extract were screened by HPLC-MS for their phenolic content. The results indicated the presence of hyperoside, isoquercitrin, rutin quercetin, quercitrin, p-coumaric and ferulic acids in the non-hydrolysed fractions. In the hydrolysed fractions, kaempferol, p-coumaric and ferulic acids were identified.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antioxidants / pharmacology*
  • Bauhinia / chemistry*
  • Chromatography, High Pressure Liquid
  • Enzyme Inhibitors / pharmacology*
  • Lipoxygenase Inhibitors / pharmacology*
  • Mass Spectrometry
  • Phenols / pharmacology*
  • Xanthine Oxidase / antagonists & inhibitors*

Substances

  • Antioxidants
  • Enzyme Inhibitors
  • Lipoxygenase Inhibitors
  • Phenols
  • Xanthine Oxidase