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miR-34a inhibits esophageal squamous cell carcinoma progression via regulation of FOXM1

Haibo Zhou1, Li Yang2, Xinhua Xu1

  • 1Institute of Oncology, The First College of Clinical Medical Science, Yichang Central People's Hospital Affiliated to China Three Gorges University, Yichang, Hubei 443000, P.R. China.

Oncology Letters
|January 19, 2019
PubMed

Insights

MicroRNA-34a (miR-34a) suppresses esophageal squamous cell carcinoma (ESCC) progression. This study shows miR-34a targets FOXM1, inhibiting ESCC cell proliferation and migration.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • MicroRNA-34a (miR-34a) is frequently downregulated in esophageal squamous cell carcinoma (ESCC).
  • The specific role and molecular mechanisms of miR-34a in ESCC remain largely unelucidated.
  • Forkhead box M1 (FOXM1) is a known oncogene and a potential target of miR-34a.

Purpose of the Study:

  • To investigate the functional role of miR-34a in ESCC.
  • To elucidate the molecular mechanism underlying miR-34a's function in ESCC.
  • To determine if miR-34a directly targets FOXM1 in ESCC.

Main Methods:

  • Quantitative real-time PCR and Western blotting to assess miR-34a and FOXM1 expression.
  • Luciferase reporter assays to validate direct targeting of FOXM1 by miR-34a.
  • Cell proliferation (CCK8 assay) and migration (scratch wound healing assay) assays to evaluate miR-34a's functional impact.

Main Results:

  • miR-34a was significantly downregulated, while FOXM1 was upregulated in ESCC tissues.
  • Overexpression of miR-34a reduced FOXM1 mRNA and protein levels in ESCC cell lines.
  • miR-34a directly targeted FOXM1, inhibiting ESCC cell proliferation, migration, and invasion by downregulating MMP2 and MMP9.

Conclusions:

  • miR-34a acts as a tumor suppressor in ESCC.
  • The miR-34a/FOXM1 axis is a critical regulator of ESCC progression.
  • Targeting the miR-34a/FOXM1 pathway may offer a therapeutic strategy for ESCC.
Keywords:
FOXM1esophageal squamous cell carcinomamiR-34a

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