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miR-29a activates Hes1 by targeting Nfia in esophageal carcinoma cell line TE-1

Chang Liu1, Ping Duan2, Bo Li2

  • 1Department of Preventive Medicine, Luohe Medical College, Luohe, Henan 462002, P.R. China.

Oncology Letters
|December 2, 2014
PubMed

Insights

Low miR-29a levels promote esophageal squamous cell carcinoma (ESCC) growth. Restoring miR-29a inhibits cancer cell proliferation and migration by downregulating Nfia and activating the Notch pathway.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA-29a (miR-29a) is implicated in human cancers.
  • The role of miR-29a in esophageal squamous cell carcinoma (ESCC) remains unclear.

Purpose of the Study:

  • To investigate the functional significance of miR-29a in ESCC.
  • To elucidate the molecular mechanisms underlying miR-29a's role in ESCC.

Main Methods:

  • Quantitative assessment of miR-29a expression in ESCC tissues and cell lines.
  • Forced expression of miR-29a in ESCC TE-1 cells.
  • Analysis of cell proliferation and migration.
  • Investigation of Notch signaling pathway components (Notch1, Hes1) and Nfia expression.
  • Nfia knockdown experiments.

Main Results:

  • miR-29a expression was significantly downregulated in ESCC tissues and cells.
  • Overexpression of miR-29a reduced ESCC cell proliferation and migration.
  • miR-29a targeted and downregulated nuclear factor 1 A (Nfia).
  • Nfia knockdown increased Hes1 expression and inhibited cell growth, suggesting Nfia's role in repressing Hes1.
  • miR-29a activated the Notch signaling pathway by downregulating Nfia, leading to increased Hes1 expression.

Conclusions:

  • Reduced miR-29a expression is a contributing factor in ESCC tumorigenesis.
  • Exogenous miR-29a can suppress ESCC growth.
  • The mechanism involves downregulation of Nfia and subsequent activation of the Notch signaling pathway, leading to Hes1 upregulation.
Keywords:
cell growthesophageal squamous cell carcinomamicroRNAnotchnuclear factor 1 A

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