Radical scavenging activity of tea catechins and their related compounds

被引：200

作者：

Nanjo, F ^{[1
]}

Mori, M ^{[1
]}

Goto, K ^{[1
]}

Hara, Y ^{[1
]}

机构：

[1] Mitsui Norin Co Ltd, Food Res Inst, Fujieda, Shizuoka 4260133, Japan

来源：

BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY | 1999年 / 63卷 / 09期

关键词：

tea; catechin; radical scavenging; superoxide anion; stoichiometric factor;

D O I：

10.1271/bbb.63.1621

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

(-)-Epigallocatechin gallate was found to be the most effective scavenger among tea catechins for the superoxide anion, hydroxyl radical, and 1,1-diphenyl-2-picrylhydrazyl radical. Examination of the scavenging effects of tea catechins and their glucosides on superoxide anion showed that the presence of at least an ortho-dihydroxyl group in the B ring and a galloyl moiety at the 3 position was important in maintaining the effectiveness of the radical scavenging ability. Stoichiometric factors of tea catechins were estimated to be 2 for (+)-catechin and (-)-epicatechin, 5 for (-)-epigallocatechin, 7 for (-)-epicatechin gallate, and 10 for (-)-epigallocatechin gallate.

引用

页码：1621 / 1623

页数：3

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