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Abstract Title:

20(S)-ginsenoside Rg3 promotes senescence and apoptosis in gallbladder cancer cells via the p53 pathway.

Abstract Source:

Drug Des Devel Ther. 2015 ;9:3969-87. Epub 2015 Aug 10. PMID: 26309394

Abstract Author(s):

Fei Zhang, Maolan Li, Xiangsong Wu, Yunping Hu, Yang Cao, Xu'an Wang, Shanshan Xiang, Huaifeng Li, Lin Jiang, Zhujun Tan, Wei Lu, Hao Weng, Yijun Shu, Wei Gong, Xuefeng Wang, Yong Zhang, Weibin Shi, Ping Dong, Jun Gu, Yingbin Liu

Article Affiliation:

Fei Zhang

Abstract:

Gallbladder cancer (GBC), the most frequent malignancy of the biliary tract, is associated with high mortality and extremely poor prognosis. 20(S)-ginsenoside Rg3 (20(S)-Rg3) is a steroidal saponin with high pharmacological activity. However, the anticancer effect of 20(S)-Rg3 in human GBC has not yet been determined. In this study, we primarily found that 20(S)-Rg3 exposure suppressed the survival of both NOZ and GBC-SD cell lines in a concentration-dependent manner. Moreover, induction of cellular senescence and G0/G1 arrest by 20(S)-Rg3 were accompanied by a large accumulation of p53 and p21 as a result of murine double minute 2 (MDM2) inhibition. 20(S)-Rg3 also caused a remarkable increase in apoptosis via the activation of the mitochondrial-mediated intrinsic caspase pathway. Furthermore, intraperitoneal injection of 20(S)-Rg3 (20 or 40 mg/kg) for 3 weeks markedly inhibited the growth of xenografts in nude mice. Our results demonstrated that 20(S)-Rg3 potently inhibited growth and survival of GBC cells both in vitro and in vivo. 20(S)-Rg3 attenuated GBC growth probably via activation of the p53 pathway, and subsequent induction of cellular senescence and mitochondrial-dependent apoptosis. Therefore, 20(S)-Rg3 may be a potential chemotherapeutic agent for GBC therapy.

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