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Association between the rs2910164 polymorphism in pre-mir-146a and oral carcinoma progression

Pei-Shi Hung1, Kuo-Wei Chang, Shou-Yen Kao

  • 1Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei, Taiwan.

Oral Oncology
|December 21, 2011
PubMed

Insights

This study found that increased miR-146a expression, influenced by areca nut extract and inflammatory signals, promotes oral squamous cell carcinoma (OSCC) growth. A specific genetic variant in pre-miR-146a is linked to advanced OSCC progression.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression via RNA interference.
  • Oral squamous cell carcinoma (OSCC) is a significant global health concern.
  • miR-146a plays a role in inflammation and oncogenesis by modulating Toll-like receptor and cytokine signaling.

Purpose of the Study:

  • To investigate the role of miR-146a in OSCC development and progression.
  • To identify factors that up-regulate miR-146a in OSCC cells.
  • To examine the association between a pre-miR-146a polymorphism and OSCC advancement.

Main Methods:

  • Investigated the effect of areca nut extract, TNFα, and TGFβ on miR-146a expression in OSCC cells.
  • Assessed the impact of elevated miR-146a on OSCC cell oncogenicity.
  • Analyzed the prevalence of the G>C polymorphism (rs2910164) in pre-miR-146a in OSCC patients and correlated it with clinicopathological features and miR-146a expression.

Main Results:

  • Areca nut extract, TNFα, and TGFβ were found to up-regulate miR-146a in OSCC cells.
  • Increased miR-146a expression enhanced the oncogenic potential of OSCC cells.
  • The C-variant of the pre-miR-146a polymorphism (rs2910164) was more frequent in OSCC patients with advanced nodal involvement and was associated with higher miR-146a expression.

Conclusions:

  • miR-146a contributes to OSCC oncogenicity.
  • The pre-miR-146a C-variant is associated with OSCC progression and potentially influences miR-146a levels.

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