食品科学 ›› 2008, Vol. 29 ›› Issue (9): 111-114.

• 基础研究 • 上一篇    下一篇

染料木素及其乳糖苷清除自由基能力的研究

 刘蓉, 曹树稳, 余燕影, 邓泽元   

  1. 南昌大学食品科学与技术国家重点实验室; 南昌大学化学系
  • 出版日期:2008-09-15 发布日期:2011-12-08

Free Radical Scavenging Activities of Genistein and Its Lactosides

 LIU  Rong, CAO  Shu-Wen, YU  Yan-Ying, DENG  Ze-Yuan   

  1. 1. State Key Laboratory of Food Science and Technology,Nanchang University,Nanchang 330047,China; 2. Department of Chemistry,Nanchang University,Nanchang 330031,China
  • Online:2008-09-15 Published:2011-12-08

摘要: 采用DPPH法、Fenton反应-邻二氮菲-Fe2+光度法和邻苯三酚自氧化法,测定染料木素及其乳糖苷修饰物清除DPPH·、·OH和O2·能力。结果表明,染料木素及其乳糖苷修饰物清除DPPH·和·OH能力的顺序为:染料木素7,4’-二-O-β-D-吡喃乳糖苷>染料木素4’-O-β-D-吡喃乳糖苷>染料木素7-O-β-D-吡喃乳糖苷>染料木素;相反,在低浓度时,染料木素清除O2·的能力强于其乳糖苷修饰物,除染料木素和染料木素7-O-β-D-吡喃乳糖苷对O2·有弱抑制作用外,其他两种乳糖苷对邻苯三酚的自氧化速率均呈现负抑制,且随样液浓度的增加,抑制率降低。

关键词: 染料木素, 乳糖苷, 自由基清除能力

Abstract: The free radical scavenging activities of genistein and its lactocides were assessed by using three methods, namely the anti-DPPH free radical, Fenton reaction with 1,10-phenanthroline-Fe2+ spectrophotometry and pyrogallol autoxidation assays. The results showed that the abilities of genistein and its lactosides in scavenging DPPH· and ·OH radicals are in the order of genistein 7,4′di-O-β-lactoside > genistein 4′-O-β-lactoside > genistein 7-O-β-lactoside > genistein. In contrast, genistein is effective in scavenging O2· than its lactosides at low concentration. Furthermore, the other two genistein lactosides have negative effects on inhibiting autoxidation rate of pyrogallol except for genistein 7-O-β-lactoside. In general, the inhibiting rates to samples decrease with the concentration increase.

Key words: genistein, lactosides, free radical scavenging activity