title: A component of green tea, (-)-epigallocatechin-3-gallate, promotes apoptosis in T24 human bladder cancer cells via modulation of the PI3K/Akt pathway and Bcl-2 family proteins.
abstract: Bladder cancer is the fourth most common cancer in men and ninth most common in women. It has a protracted course of progression and is thus an ideal candidate for chemoprevention strategies and trials. This study was conducted to evaluate the chemopreventive/antiproliferative potential of (-)-epigallocatechin gallate (EGCG, the major phytochemical in green tea) against bladder cancer and its mechanism of action. Using the T24 human bladder cancer cell line, we found that EGCG treatment caused dose- and time-dependent inhibition of cellular proliferation and cell viability, and induced apoptosis. Mechanistically, EGCG inhibits phosphatidylinositol 3'-kinase/Akt activation that, in turn, results in modulation of Bcl-2 family proteins, leading to enhanced apoptosis of T24 cells. These findings suggest that EGCG may be an important chemoprevention agent for the management of bladder cancer.
authors.affiliation: Department of Urology, First Affiliated Hospital, Medical College, Zhejiang University, Qingchun Road 79, Hangzhou 310003, Zhejiang Province, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Xie
authors.forename: Xiang-Yi
authors.initials: XY
authors.lastname: Zheng
authors.forename: Yun-Bin
authors.initials: YB
authors.lastname: Wang
authors.forename: Yu
authors.initials: Y
authors.lastname: Bai
authors.forename: Hua-Feng
authors.initials: HF
authors.lastname: Shen
authors.forename: Long-Cheng
authors.initials: LC
authors.lastname: Li
authors.forename: Rajvir
authors.initials: R
authors.lastname: Dahiya
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D006801:Humans; D019869:Phosphatidylinositol 3-Kinases / Q000502:physiology*; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt / Q000502:physiology*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000502:physiology*; D001749:Urinary Bladder Neoplasms
chemical_list: D002392:Catechin; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt; D019253:Proto-Oncogene Proteins c-bcl-2; C045651:epigallocatechin gallate