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Active extracts of black tea (Camellia Sinensis) induce apoptosis of PC-3 prostate cancer cells via mitochondrial dysfunction

文献类型： 外文期刊

作者： Sun, Shili 1 ; Pan, Shunshun 1 ; Miao, Aiqing 1 ; Ling, Caijin 1 ; Pang, Shi 1 ; Tang, Jinchi 1 ; Chen, Dong 1 ; Zhao, Ch 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Drink Plant Res Inst, Tea Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

关键词： Black tea;Cytochrome cytochrome c;Mitochondria;PC-3 cells;Theaflavins

期刊名称：ONCOLOGY REPORTS （ 影响因子：3.906； 五年影响因子：4.011 ）

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收录情况： SCI

摘要： Cancer of the prostate gland is the most common invasive malignancy and the second leading cause of cancer-related death in human males. Many studies have shown that black tea reduces the risk of several types of cancer. We studied the effects of active extracts of black tea and the black tea polyphenols theaflavins (TFs), on the cellular prolifera tion and mitochondria of the human prostate cancer cell line PC-3. Our studies revealed that Yinghong black tea extracts (YBT), Assam black tea extracts (ABT) and TFs inhibited cell proliferation in a dose-dependent manner. We also showed that TFs, YBT and ABT affected the morphology of PC-3 cells and induced apoptosis or even necrosis in PC-3 cells. In addition, it was observed that the samples signifi cantly caused loss of the mitochondrial membrane potential, release of cytochrome c from the intermembrane space into the cytosol, decrease of the ATP content and activation of caspase-3 compared with the control. Taken together, these findings suggest that black tea could act as an effective anti-proliferative agent in PC-3 cells, and TFs, YBT and ABT induced apoptosis of PC-3 cells through mitochondrial dysfunction.

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