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MiR-206 functions as a tumor suppressor and directly targets K-Ras in human oral squamous cell carcinoma

Feiou Lin1, Linjie Yao2, Jin Xiao3

  • 1Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, People's Republic of China.

Oncotargets and Therapy
|September 24, 2014
PubMed
Abstract

Insights

MicroRNA-206 (miR-206) is downregulated in oral squamous cell carcinoma (OSCC), acting as a tumor suppressor. Restoring miR-206 levels may offer a novel therapeutic strategy for OSCC treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA-206 (miR-206) is frequently downregulated in human cancers, impacting tumor progression.
  • The specific role and molecular mechanisms of miR-206 in oral squamous cell carcinoma (OSCC) remain largely unelucidated.

Purpose of the Study:

  • To investigate the functional role of miR-206 in the tumorigenesis and development of oral squamous cell carcinoma (OSCC).
  • To explore the potential of miR-206 as a therapeutic target in OSCC.

Main Methods:

  • Quantitative real-time polymerase chain reaction (qRT-PCR) to assess miR-206 expression in OSCC cell lines and tissues.
  • Analysis of the correlation between miR-206 expression and clinicopathological features, as well as patient prognosis.
  • In vitro experiments to evaluate the impact of miR-206 on OSCC cell proliferation, invasion, migration, and apoptosis.
  • Luciferase reporter assays to confirm K-Ras as a direct target of miR-206.

Main Results:

  • MiR-206 expression was significantly decreased in OSCC tissues and cell lines (P<0.001).
  • Lower miR-206 levels correlated with advanced TNM stage, T classification, positive lymph node metastasis, and poorer overall survival.
  • Overexpression of miR-206 inhibited OSCC cell proliferation, invasion, and migration, while promoting apoptosis in vitro.
  • K-Ras was identified as a direct downstream target regulated by miR-206.

Conclusions:

  • MiR-206 functions as a tumor suppressor in oral squamous cell carcinoma (OSCC).
  • The findings suggest that miR-206 holds potential as a novel therapeutic agent for miR-based treatments in OSCC.
Keywords:
apoptosisinvasionmiR-206oral squamous cell carcinomaprognosisproliferation

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