Inhibition of xanthine oxidase by acacia confusa extracts and their phytochemicals

Yu Tang Tung, Shang Tzen Chang

研究成果: 雜誌貢獻文章同行評審

40 引文 斯高帕斯(Scopus)


Acacia confusa Merr. (Leguminosae) is traditionally used as a medicinal plant in Taiwan. In the present study, the XOD-inhibitory activity of ethanolic extracts from A. confusa was investigated for the first time. Results demonstrated that the ethanolic extract of A. confusa heartwood had a strong XOD-inhibitory activity. Among all fractions derived from heartwood extracts, the EtOAc fraction exhibited the best inhibitory activity. Following column chromatography and reverse-phase highperformance liquid chromatography, eight specific phytochemicals including melanoxetin, 7,8,3′, 4′-tetrahydroxyflavone, transilitin, okanin, 3,7,8,3′-tetrahydroxy- 4'-methoxyflavone, 7,8,3′-trihydroxy3,4'-dimethoxyflavone, 7,3′,4′-trihydroxyflavone, and 7,3′,4′-trihydroxy-3- methoxyflavone were isolated and identified from the EtOAc fraction. In addition, the IC 50 values indicated that okanin showed the strongest XOD-inhibitory effect (IC 50 value of 0.076 μM), followed by melanoxetin (0.274 μM) and allopurinol (4.784 μM). The present study revealed that okanin and melanoxetin showed excellent inhibition on XOD in noncompetitive and competitive mode, respectively, and their inhibitory activity is better than that of allopurinol. This is the first study that demonstrates the XOD-inhibitory performance of okanin and melanoxetin.
頁(從 - 到)781-786
期刊Journal of Agricultural and Food Chemistry
出版狀態已發佈 - 1月 27 2010

ASJC Scopus subject areas

  • 農業與生物科學 (全部)
  • 化學 (全部)


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