BMP9/p38 MAPK is essential for the antiproliferative effect of resveratrol on human colon cancer

Yuan,Shuang-Xue; Wang,Dong-Xu; Wu,Qiu-Xiang; Ren,Chun-Mei; Li,Yang; Chen,Qian-Zhao; Zeng,Yu-Hua; Shao,Ying; Yang,Jun-Qin; Bai,Yan; Zhang,Pu; Yu,Yu; Wu,Ke; Sun,Wen-Juan; He,Bai-Cheng

doi:10.3892/or.2015.4407

BMP9/p38 MAPK is essential for the antiproliferative effect of resveratrol on human colon cancer

Authors:
- Shuang-Xue Yuan
- Dong-Xu Wang
- Qiu-Xiang Wu
- Chun-Mei Ren
- Yang Li
- Qian-Zhao Chen
- Yu-Hua Zeng
- Ying Shao
- Jun-Qin Yang
- Yan Bai
- Pu Zhang
- Yu Yu
- Ke Wu
- Wen-Juan Sun
- Bai-Cheng He
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Affiliations: Chongqing Municipal Key Laboratory of Higher Education Institutions for Biochemistry and Molecular Pharmacology, School of Pharmacy, Chongqing Medical University, Yuzhong, Chongqing, P.R. China
Published online on: November 10, 2015 https://doi.org/10.3892/or.2015.4407
Pages: 939-947

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Abstract

Colon cancer is one of the most common malignancies of the digestive system. Although more effective therapeutic strategies have been developed in the last decades, there is still a great clinical need to explore new treatment regimens for colon cancer due to the undesirable prognosis. In the present study, we investigated the anticancer activity of resveratrol (Res) in human colon cancer cells, and the possible mechanism underlying this effect. We employed crystal violet staining, flow cytometry and western blotting to test the antiproliferation- and apoptosis-inducing effects of Res in LoVo cells. A xenograft tumor model was also introduced to confirm the in vivo anticancer effect of Res. Using PCR, western blotting, a recombinant adenovirus and a specific inhibitor of p38 MAPK or bone morphogenetic protein receptor (BMPR) to explore the possible molecular mechanisms. We found that Res markedly inhibited the proliferation and promoted the apoptosis of LoVo cells, and suppressed the in vivo tumor growth of colon cancer. Res substantially upregulated the expression of bone morphogenetic protein 9 (BMP9). Exogenous expression of BMP9 enhanced the anticancer effect of Res in LoVo cells, while BMP9 knockdown partly reduced this activity. Res increased the activation of p38 MAPK, which was enhanced by the exogenous expression of BMP9. The anticancer activity of Res, or Res combined with BMP9, was reduced partly by the p38 MAPK inhibitor. The BMPR inhibitor almost abolished the Res-induced activation of p38 MAPK, and attenuated the antiproliferative effect of Res in the LoVo cells. Our findings strongly suggest that the anticancer effect of Res in human colon cancer cells may be partly mediated by upregulation of BMP9 to activate p38 MAPK in a BMPR-dependent manner.

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