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黄酮抗氧化和促氧化双重性初探

卢景芬, 李霆, 金铎, 沈传勇, 王夔, 殷俊杰   

  1. 1. 北京医科大学, 天然药物及仿生药物国家重点实验室, 北京 100083;
    2. 美国FDA, 仪器和生物物理部, 华盛顿 DC20204
  • 收稿日期:1997-11-20 修回日期:1998-07-03 出版日期:1999-03-15 发布日期:1999-03-15

Preliminary Study of Dual Characteristics of Antioxidation and Prooxidation of Flavonoids

Lu Jingfen, Li Ting, Jin Duo, Shen Chuanyong, Wang Kui, Yin Junjie   

  1. 1. National Key Laboratory of Natural and Biomimetic Drugs, Beijing 100083
    2. Instrumentation and Biophysics Branch. FDA. Washington, DC20204
  • Received:1997-11-20 Revised:1998-07-03 Online:1999-03-15 Published:1999-03-15

摘要: 本文用自旋捕捉ESR方法比较地研究黄酮对羟基和超氧阴离子自由基的清除特性。清除能力与分子的结构有关, 例如分子中OH基团的数目和位置。用分子模拟方法对分子及其单电子氧化后的产物进行量化计算的结果与ESR实验的结果相对应。自旋标记ESR的实验结果表明某些黄酮化合物能损伤人红细胞膜膜蛋白的构象, 象是氧化性损伤并且与分子结构及浓度有关。黄酮的抗氧化和促氧化双重性值得进一步研究。

关键词: 黄酮, 活性氧自由基, 抗氧化, 促氧化, ESR

Abstract: Flavonoids were comparatively studied as the scavengers of hydroxyl and superoxide flee radicals by means of spin trapping-electron spin resonance(ESR) method. The relative activity is related to molecular structures, i.e., the number and position of hydroxyl groups. With molecular modeling and quantum chemistry calculation methods, the relationships were also revealed from the structural analysis of the flavonoids and the products of their single electron oxidation. The spin labeling ESR results indicate that some flavonoids Can influence the conformation of membrane protein, which is likely due to oxidative damage. Both antioxidation and prooxidation characteristics of flavdnoids are worth further studying in detail.

Key words: Flavonoids, Reactive oxygen free radical, Antioxidation, Prooxidation, ESR

Supporting:

Supported by the Foundation of the National Key Laboratory of Natural and Biomimetic Drugs