miR-203 Functions as a Tumor Suppressor by Inhibiting Epithelial to Mesenchymal Transition in Ovarian Cancer

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Guannan Zhao1, Yuqi Guo2, Zixuan Chen3

  • 1Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, USA; Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, USA; The Third Affiliated Hospital, Zhengzhou University, China.

Journal of Cancer Science & Therapy
|January 29, 2016
PubMed
Abstract

Insights

MicroRNA-203 (miR-203) acts as a tumor suppressor in ovarian cancer by downregulating Snai2. Its overexpression inhibits cancer cell proliferation, migration, invasion, and epithelial-mesenchymal transition, leading to reduced tumor growth.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Ovarian cancer is a leading cause of death in women, often due to metastasis and recurrence.
  • MicroRNAs (miRNAs) are key regulators of gene expression, acting as either tumor suppressors or oncogenes.
  • The specific role of miR-203 in ovarian cancer progression requires further investigation.

Purpose of the Study:

  • To investigate the role of miR-203 in ovarian cancer.
  • To determine the effect of miR-203 on ovarian cancer cell behavior and tumor growth.

Main Methods:

  • miR-203 was overexpressed in ovarian cancer cell lines (SKOV3, OVCAR3) using lentiviral vectors.
  • Cell proliferation, migration, and invasion were assessed using MTT, transwell, and Matrigel assays.
  • Tumor growth was evaluated in a xenograft mouse model.

Main Results:

  • miR-203 was downregulated, and its target Snai2 upregulated in ovarian tumors.
  • High miR-203 expression correlated with better patient survival.
  • miR-203 overexpression suppressed ovarian cancer cell proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT).
  • Silencing Snai2 mimicked miR-203's inhibitory effects on EMT and invasion.
  • Overexpression of miR-203 significantly reduced tumor growth in vivo.

Conclusions:

  • miR-203 functions as a tumor suppressor in ovarian cancer.
  • miR-203 exerts its tumor-suppressive effects by downregulating Snai2.
  • Targeting miR-203 or its pathway may offer therapeutic strategies for ovarian cancer.
Keywords:
Epithelial to mesenchymal transitionOvarian cancermiR-203

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