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miR-149 Inhibits Non-Small-Cell Lung Cancer Cells EMT by Targeting FOXM1

Yang Ke1, Weiyong Zhao, Jie Xiong

  • 1Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.

Biochemistry Research International
|June 14, 2013
PubMed

Insights

MicroRNA-149 (miR-149) suppresses the epithelial-to-mesenchymal transition (EMT) in non-small-cell lung cancer (NSCLC) cells. This microRNA targets FOXM1, inhibiting cancer cell invasion and progression.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • MicroRNAs (miRNAs) are key regulators implicated in cancer progression.
  • Epithelial-to-mesenchymal transition (EMT) is a critical process in non-small-cell lung cancer (NSCLC) cell invasion.

Purpose of the Study:

  • To investigate the role of miR-149 in NSCLC cell EMT.
  • To identify the molecular targets of miR-149 involved in EMT.

Main Methods:

  • Correlation analysis of miR-149 expression with NSCLC cell invasiveness and EMT markers.
  • In vitro experiments to assess miR-149's effect on EMT.
  • Target validation using luciferase assays and Western blotting to confirm FOXM1 as a direct target.
  • Rescue experiments with FOXM1 overexpression.

Main Results:

  • miR-149 expression is downregulated in NSCLC and inversely correlated with invasive potential.
  • miR-149 significantly inhibits EMT in NSCLC cells.
  • miR-149 directly targets Forkhead box M1 (FOXM1).
  • FOXM1 mediates TGF-β1-induced EMT, and its overexpression rescues miR-149's inhibitory effect.

Conclusions:

  • miR-149 acts as a tumor suppressor by inhibiting EMT in NSCLC.
  • The miR-149/FOXM1 axis is a critical pathway regulating NSCLC cell invasion and metastasis.

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