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Int J Biol Sci 2016; 12(7):850-860. doi:10.7150/ijbs.14773

Research Paper

Deguelin Induces the Apoptosis of Lung Squamous Cell Carcinoma Cells through Regulating the Expression of Galectin-1

Bing Yan1, Dejian Zhao2, Yinan Yao1, Zhang Bao1, Guohua Lu1, Jianying Zhou1✉

1. Department of Respiratory Diseases, First Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, Hangzhou, China
2. Department of Clinical Laboratory, First Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, Hangzhou, China

Abstract

Lung cancer is the leading cause of cancer mortality around the world. Despite advances in the targeted therapy, patients with lung squamous cell carcinoma(SCC) still benefit few from it, and the search for potential effective therapies is imperative. Here, we demonstrated that deguelin induced significant apoptosis of lung SCC cells in vitro. Importantly, we found deguelin down-regulated the expression of galectin-1, which was involved in a wide range of tumorous physiologic process. Thus, we both over-expressed and down-regulated galectin-1 to perform its role in deguelin-induced apoptosis. We found that increased galectin-1 attenuated apoptosis of SCC cells exposed to deguelin, while galectin-1 knockdown sensitized lung cancer cells to deguelin treatment. Additionally, we observed that down-regulation of galectin-1 resulted in suppression of Ras/Raf/ERK pathway which was involved in deguelin-induced cell apoptosis. We also found that deguelin had a significant anti-tumor ability with decline of galectin-1 in vivo. In conclusion, these findings confirm that deguelin may act as a new chemo-preventive agent through inducing apoptosis of lung SCC cells in a galectin-1 dependent manner.

Keywords: Deguelin, Lung squamous cell carcinoma, Apoptosis, Galectin-1

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How to cite this article:
Yan B, Zhao D, Yao Y, Bao Z, Lu G, Zhou J. Deguelin Induces the Apoptosis of Lung Squamous Cell Carcinoma Cells through Regulating the Expression of Galectin-1. Int J Biol Sci 2016; 12(7):850-860. doi:10.7150/ijbs.14773. Available from http://www.ijbs.com/v12p0850.htm