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Int J Biol Sci 2017; 13(6):782-793. doi:10.7150/ijbs.18732

Research Paper

Dioscin Induces Gallbladder Cancer Apoptosis by Inhibiting ROS-Mediated PI3K/AKT Signalling

Xiaoling Song1, 2*, Zheng Wang1, 2*, Haibin Liang1, 2*, Wenjie Zhang1*, Yuanyuan Ye1, 2, HuaiFeng Li1, 2, Yunping Hu1, 2, Yijian Zhang1, 2, Hao Weng1, Jianhua Lu1, Xuefeng Wang1, Maolan Li1, 2, Yingbin Liu1, 2✉, Jun Gu1✉

1. Department of General Surgery and Laboratory of General Surgery, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China;
2. Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.
* Xiaoling Song, Zheng Wang, Haibin Liang and Wenjie Zhang contributed equally to this work.

Abstract

Gallbladder cancer (GBC), highly aggressive form of cancer with an extremely poor prognosis, is the most common malignancy of the biliary tract. In this study, we investigated the effects of dioscin (DSN) on human GBC and the potential mechanisms underlying these effects. The results showed that DSN significantly inhibited GBC cell proliferation and migration. Moreover, DSN induced GBC cell apoptosis via mitochondrial dependent apoptotic signalling. Reactive oxygen species (ROS) and glutathione (GSH) levels were measured, and ROS scavengers completely inhibited DSN-induced apoptosis and migration, indicating that ROS play an essential role in GBC progression. Western blot analysis showed that AKT activity was significantly downregulated after DSN treatment, and that inhibition/ectopic expression of AKT enhanced/abolished DSN-induced apoptosis but not migration. Furthermore, we confirmed the relationship between ROS and the PI3K/AKT pathway and found that DSN induced apoptosis by regulating ROS-mediated PI3K/AKT signaling. Taken together, these findings indicate that DSN induces GBC apoptosis through inhibiting ROS-mediated PI3K/AKT signalling.

Keywords: gallbladder cancer, apoptosis, dioscin, reactive oxygen species.

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How to cite this article:
Song X, Wang Z, Liang H, Zhang W, Ye Y, Li H, Hu Y, Zhang Y, Weng H, Lu J, Wang X, Li M, Liu Y, Gu J. Dioscin Induces Gallbladder Cancer Apoptosis by Inhibiting ROS-Mediated PI3K/AKT Signalling. Int J Biol Sci 2017; 13(6):782-793. doi:10.7150/ijbs.18732. Available from http://www.ijbs.com/v13p0782.htm