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miR-30d Blocked Transforming Growth Factor β1-Induced Epithelial-Mesenchymal Transition by Targeting Snail in Ovarian

Zhongxue Ye1, Le Zhao, Jie Li

  • 1Centers for *Translational Medicine and †Laboratory Medicine, the First Affiliated Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi, People's Republic of China.

International Journal of Gynecological Cancer : Official Journal of the International Gynecological Cancer Society
|October 27, 2015
PubMed
Abstract

Insights

MicroRNA-30d (miR-30d) suppresses ovarian cancer progression by inhibiting epithelial-mesenchymal transition (EMT) and targeting Snail. This finding suggests miR-30d analogs could be potential ovarian cancer therapeutics.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Gene Regulation

Background:

  • MicroRNAs (miRs) regulate gene expression and their dysregulation is implicated in cancer.
  • Epithelial-mesenchymal transition (EMT) is a key process in cancer development and metastasis.
  • The role of miR-30d in transforming growth factor β1 (TGF-β1)-induced EMT in ovarian cancer requires further investigation.

Purpose of the Study:

  • To investigate the role of miR-30d in TGF-β1-induced EMT in ovarian cancer cells.
  • To identify the molecular mechanisms underlying miR-30d's function in ovarian cancer progression.

Main Methods:

  • TGF-β1 was used to induce EMT in ovarian cancer cell lines (SKOV3 and 3AO).
  • Quantitative real-time PCR and Western blot were used to assess gene and protein expression (E-cadherin, N-cadherin, vimentin, Snail).
  • Cell migration and invasion assays were performed, and luciferase assays verified direct targeting of Snail by miR-30d.

Main Results:

  • TGF-β1 induction led to down-regulation of miR-30b, miR-30c, and miR-30d in ovarian cancer cells.
  • Restoring miR-30d expression reversed EMT phenotypes, including morphological changes and altered molecular marker expression.
  • miR-30d directly targets and inhibits Snail expression, a key regulator of EMT.

Conclusions:

  • miR-30d acts as a tumor suppressor in ovarian cancer by inhibiting TGF-β1-induced EMT.
  • The mechanism involves the direct downregulation of Snail expression.
  • miR-30d analogs hold potential as therapeutic agents for ovarian cancer treatment.

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