云南晒青绿茶和普洱茶多糖抗氧化活性研究

Studies on the Antioxidant Activity of Polysaccharides in Sundried Green Tea and Pu-erh Tea

从晒青绿茶和八级普洱茶中提取、纯化得到2种茶多糖TPS1和TPS2。通过体外清除有机自由基DP-PH的能力和体内动物试验确定这2种茶多糖的抗氧化活性。结果表明:2种茶多糖在一定程度上提高小白鼠体内的总抗氧化能力和体内羟自由基抑制率;能够减少小白鼠血清中丙二醛的含量,但对小白鼠血清中黄嘌啉抗氧化酶活力的影响较小;雌雄小鼠间差异较大;体外清除自由基DPPH的效果不明显。

Sun dried-green tea and 8th-grade pu-erh tea in Yunnan were used as the raw materials. After isolatated and purified, the antioxidation of TPSland TPS2 were tested. Antixidation test done with mice showed that TPS1 and TPS2 could increase the total antioxidation and hydroxyl free racial antioxidation in mice blood to a certain extent. It had significant effects to reducing the content of MDA , but had no significant effects to XOD content in mice blood. The difference between male and female mice was significant. In vitro antioxidation activity of TPSland TPS2 were evaluated by DPPH. The results showed the effects of scavenging DPPH free radical was not significant.