Abstract Title:

Oleanolic Acid Inhibits Epithelial-Mesenchymal Transition of Hepatocellular Carcinoma by Promoting iNOS Dimerization.

Abstract Source:

Mol Cancer Ther. 2019 01 ;18(1):62-74. Epub 2018 Oct 8. PMID: 30297361

Abstract Author(s):

Hongzhi Wang, Weilong Zhong, Jianmin Zhao, Heng Zhang, Qiang Zhang, Yuan Liang, Shuang Chen, Huijuan Liu, Shumin Zong, Yixuan Tian, Honggang Zhou, Tao Sun, Yanrong Liu, Cheng Yang

Article Affiliation:

Hongzhi Wang


Oleanolic acid exhibits extensive pharmacologic activities and takes significant antitumor effects. Its pharmacologic mechanism, however, still remained to be further clarified. In this study, we demonstrated that oleanolic acid attenuated the migration and invasion abilities, resulting in the suppression of the epithelial-mesenchymal transition (EMT) process in liver cancer cells, and inhibited the tumor growth of the peritoneal lymphocytes-bearing mice. We further proved that inducible nitric oxide synthase (iNOS) may be the potential target of oleanolic acid. We confirmed that oleanolic acid could promote the dimerization of iNOS, activating it, and subsequently increasing the production of nitric oxide. Further experiments indicated that oleanolic acid promoted the nitration of specific proteins and consequently suppressed their EMT-related biological functions. Furthermore, it has been confirmed that oleanolic acid enhanced the antitumor effects of regorafenib in liver cancer treatment. These results deepened our understanding of the pharmacologic mechanism of the antitumor effect oleanolic acid, and the importance of nitric oxide synthetase as a therapeutic target for liver cancer treatment.

Study Type : In Vitro Study

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