普洱茶提取物抗氧化及其对Na_2S_2O_3诱导HUVEC损伤的保护作用  

Antioxidtive Activities of Pu-erh Tea Extracts and Their Protective Effect on HUVEC Damage Induced by Na_2S_2O_3

作　　者：王岳飞[1] 罗子华[1] 邬新荣[2] 陈红波[1] 徐平[1] 杨贤强[1] 

机构地区：[1]浙江大学茶学系,浙江杭州310029 [2]浙江省茶叶集团有限公司,浙江杭州310016

出　　处：《茶叶科学》2010年第6期475-481,共7页Journal of Tea Science

摘　　要：利用普洱茶加工过程中废弃的碎茶灰为原料制备提取物,分析其主要化学成分组成,以ABTS和FRAP体系评价了普洱生茶、普洱熟茶提取物的抗氧化活性,并研究了这两种提取物对Na2S2O3诱导人脐静脉血管内皮细胞(HUVEC)损伤的保护作用。结果表明,普洱熟茶提取物中主要化学成分除咖啡碱外均低于普洱生茶提取物,其中酯型儿茶素含量减少最多。同时,普洱熟茶提取物对ABTS+清除能力和铁离子还原能力都较普洱生茶提取物作用弱,而对HUVEC损伤的保护作用却强于普洱生茶提取物,并在特定浓度下与茶多酚相当。Extracts of raw and ripe Pu-erh tea were prepared from tea dust during processing.The antioxidtive activities of extracts were evaluated by ABTS and FRAP systems.The potentially protective effects of extracts on human umbilical vascular endothelial cells(HUVEC) were investigated in Na2S2O3-induction model.The results showed that the extract of raw Pu-erh tea had stronger antioxidtive activity than that of ripe Pu-erh tea in both test systems.But extract of ripe Pu-erh tea showed a less protective effect tha...

关 键 词：普洱茶 抗氧化 HUVEC 保护作用 

分 类 号：R285.5[医药卫生—中药学]