Immunostimulating activity of a crude polysaccharide derived from green tea (Camellia sinensis) extract

被引：85

作者：

Monobe, Manami ^{[1
]}

Ema, Kaori ^{[1
]}

Kato, Fumiko ^{[1
]}

Maeda-Yamamoto, Mari ^{[1
]}

机构：

[1] NARO, Natl Inst Vegetable & Tea Sci, Shizuoka 4288501, Japan

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2008年 / 56卷 / 04期

关键词：

green tea extract; crude polysaccharide; immunostimulating activity; strictinin; catechins;

D O I：

10.1021/jf073127h

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Green tea extract is well-known to reduce the risk of a variety of diseases. Here, we investigated the immunostimulating activity of tea polysaccharide (TPS), one of the main components in green tea extract. The water extracts from mature or immature tea leaves were precipitated by using ethanol at room temperature. The sediment was washed with ethanol and acetone alternately and then dried. We used the phagocytic activity of macrophage-like cells as an indicator of immune function activation. Chemical components were analyzed by HPLC. The immunostimulating activity of TPS from immature leaves extract was higher than that of TIPS from mature leaves, and its activities were dependent on the content of strictinin in the leaf extract. Futhermore, a mixture of catechin and TPS that removed polyphenols did not increase the immunostimulating activity. These results suggest that the catechin-polysaccharide complex is a very important molecule in the immunomodulating activity of tea extracts.

引用

页码：1423 / 1427

页数：5

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