不同提取温度对绿茶（茶树）提取物中表没食子儿茶素没食子酸酯/表没食子儿茶素比例的影响及其对小鼠IgA产生的影响。
Effect on the epigallocatechin gallate/epigallocatechin ratio in a green tea (Camellia sinensis L.) extract of different extraction temperatures and its effect on IgA production in mice.
作者信息
Monobe Manami, Ema Kaori, Tokuda Yoshiko, Maeda-Yamamoto Mari
机构信息
National Institute of Vegetable and Tea Science, NARO, Shimada, Shizuoka, Japan.
出版信息
Biosci Biotechnol Biochem. 2010;74(12):2501-3. doi: 10.1271/bbb.100498. Epub 2010 Dec 7.
We found that the epigallocatechin gallate (EGCG)/epigallocatechin (EGC) ratio in a green tea (Camellia sinensis L.) extract was affected by the extraction temperature. The EGCG/EGC ratio in the 4 °C extract was around 1:3-4, whereas in the 100 °C extract, it was around 1:0.7. Oral administration of the mixture with a high EGC ratio (1:2-3 = EGCG/EGC) resulted in greater IgA production by murine Peyer's patch cells.
我们发现，绿茶（茶树）提取物中的表没食子儿茶素没食子酸酯（EGCG）/表没食子儿茶素（EGC）比例受提取温度影响。4℃提取物中的EGCG/EGC比例约为1:3 - 4，而100℃提取物中的该比例约为1:0.7。口服具有高EGC比例（1:2 - 3 = EGCG/EGC）的混合物可使小鼠派伊尔结细胞产生更多的IgA。
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