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MicroRNA-193a inhibits breast cancer proliferation and metastasis by downregulating WT1

FeiYan Xie1, Sumayyah Hosany1, Shen Zhong1

  • 1Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China.

Plos One
|October 11, 2017
PubMed

Insights

MicroRNA-193a (miR-193a) acts as a tumor suppressor in breast cancer by inhibiting cell growth and metastasis. Restoring miR-193a levels, which are decreased in tumors, offers a potential therapeutic strategy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA-193a (miR-193a) is recognized as a suppressor miRNA in various cancers.
  • The specific anti-oncogenic functions of miR-193a in breast cancer remain largely uncharacterized.

Purpose of the Study:

  • To investigate the role of miR-193a in breast cancer progression.
  • To identify the molecular targets and mechanisms underlying miR-193a's function in breast cancer.

Main Methods:

  • Quantitative real-time PCR to assess miR-193a expression in breast cancer cell lines and tissues.
  • Cell proliferation, colony formation, migration, and invasion assays to evaluate miR-193a's functional impact.
  • Luciferase reporter assays and Western blotting to confirm the interaction between miR-193a and Wilms' tumor 1 (WT1).

Main Results:

  • miR-193a expression was significantly decreased in breast cancer cell lines and tissues compared to non-tumor controls.
  • Overexpression of miR-193a suppressed proliferation, colony formation, migration, and invasion in breast cancer cells.
  • miR-193a directly targets Wilms' tumor 1 (WT1) by binding to its coding region, leading to reduced WT1 expression.
  • WT1 overexpression partially reversed the anti-cancer effects induced by miR-193a.

Conclusions:

  • The miR-193a-WT1 interaction is a critical factor in regulating breast cancer metastasis.
  • Restoring miR-193a expression represents a promising therapeutic avenue for breast cancer treatment.

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