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Induction and Analysis of Epithelial to Mesenchymal Transition
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Induction and Analysis of Epithelial to Mesenchymal Transition

Published on: August 27, 2013

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

Hongzhi Wang1,2, Weilong Zhong1,2, Jianmin Zhao3

  • 1Tianjin Key Laboratory of Molecular Drug Research, Tianjin International Joint Academy of Biomedicine, Tianjin, China.

Molecular Cancer Therapeutics
|October 10, 2018
PubMed

Insights

Oleanolic acid suppresses liver cancer progression by inhibiting cell migration and invasion. It targets inducible nitric oxide synthase (iNOS), enhancing antitumor effects and potentially improving cancer treatments.

Area of Science:

  • Pharmacology
  • Oncology
  • Molecular Biology

Background:

  • Oleanolic acid possesses known antitumor properties, but its precise mechanisms require further elucidation.
  • Liver cancer remains a significant global health challenge, necessitating novel therapeutic strategies.
  • Understanding the molecular targets of oleanolic acid is crucial for optimizing its clinical application.

Purpose of the Study:

  • To investigate the pharmacologic mechanisms underlying the antitumor effects of oleanolic acid in liver cancer.
  • To identify potential molecular targets of oleanolic acid, focusing on its role in cancer cell migration and invasion.
  • To evaluate the synergistic effects of oleanolic acid with existing liver cancer therapies.

Main Methods:

  • In vitro studies using liver cancer cell lines to assess migration, invasion, and epithelial-mesenchymal transition (EMT) markers.
  • In vivo experiments using mice models to evaluate tumor growth inhibition.
  • Biochemical assays to determine the interaction of oleanolic acid with inducible nitric oxide synthase (iNOS) and protein nitration.
  • Combination therapy studies with regorafenib.

Main Results:

  • Oleanolic acid significantly attenuated liver cancer cell migration and invasion by suppressing EMT.
  • The compound inhibited tumor growth in a mouse model.
  • Oleanolic acid was found to promote iNOS dimerization and activation, leading to increased nitric oxide production and subsequent protein nitration.
  • Oleanolic acid enhanced the antitumor efficacy of regorafenib in liver cancer treatment.

Conclusions:

  • Oleanolic acid exerts antitumor effects by inhibiting EMT and tumor growth in liver cancer.
  • Inducible nitric oxide synthase (iNOS) is a key molecular target of oleanolic acid, mediating its effects through nitric oxide production and protein nitration.
  • Oleanolic acid holds potential as an adjuvant therapy to enhance the effectiveness of existing treatments like regorafenib for liver cancer.

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