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标题：Effects of Oolong Tea on Plasma Antioxidative Capacity in Mice Loaded with Restraint Stress Assessed Using the Oxygen Radical Absorbance Capacity (ORAC) Assay
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作者：Hiroshi Kurihara ; Harukazu Fukami ; Sumio Asami 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：2004
卷号：27
期号：7
页码：1093-1098
DOI：10.1248/bpb.27.1093
出版社：The Pharmaceutical Society of Japan
摘要：In the present study, we investigated the antioxidative effect of oolong tea in vitro and in vivo using the oxygen radical absorbance capacity (ORAC) assay. An oolong tea extract, catechin and related compounds suppressed the oxidation of fluorescence induced by AAPH in a dose-dependent manner, that is, they prolonged the antioxidant time in vitro . Oral administration of the oolong tea extract to mice treated with restraint stress increased ORAC activity in plasma as compared with a stress control group. The extract also increased plasma vitamin C levels, and there was a good relationship between ORAC activity and the vitamin C level in plasma. The elevation of plasma ORAC and vitamin C level may have been related to the stress-relieving effect of oolong tea. These effects are probably due to the antioxidative properties of the tea. Thus, these findings suggested that oolong tea has beneficial effects on health related to its antioxidative action.
关键词：oolong tea;antioxidant;oxygen radical absorbance capacity (ORAC)