Tumor suppressor role of microRNA-545 in oral squamous cell carcinoma

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Multi-photon Imaging of Tumor Cell Invasion in an Orthotopic Mouse Model of Oral Squamous Cell Carcinoma
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Multi-photon Imaging of Tumor Cell Invasion in an Orthotopic Mouse Model of Oral Squamous Cell Carcinoma

Published on: July 25, 2011

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Guangyi Yuan1, Haoming Wu1, Yu Du2

  • 1Department of Oral and Maxillofacial Surgery, Shunde Hospital of Guangzhou Medical University, Foshan, Guangdong 528315, P.R. China.

Oncology Letters
|January 25, 2019
PubMed

Insights

MicroRNA-545 (miR-545) acts as a tumor suppressor in oral squamous cell carcinoma (OSCC). Lower miR-545 levels in OSCC tissues correlate with increased cell proliferation and migration, suggesting its therapeutic potential.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Oral squamous cell carcinoma (OSCC) is a prevalent cancer type with significant health implications.
  • MicroRNAs (miRNAs) are crucial regulators in cancer development, including OSCC.
  • miR-545 has demonstrated tumor-inhibitory roles in other cancers, prompting investigation in OSCC.

Purpose of the Study:

  • To investigate the functional role of miR-545 in oral squamous cell carcinoma (OSCC).
  • To determine the expression levels of miR-545 in OSCC tissues compared to normal tissues.
  • To identify potential targets of miR-545 in OSCC.

Main Methods:

  • Quantitative analysis of miR-545 expression in OSCC tissues versus adjacent normal tissues.
  • In vitro experiments assessing the effects of miR-545 overexpression/inhibition on OSCC cell (HSC4) proliferation and migration.
  • Bioinformatic analysis and experimental validation to identify miR-545 target genes, specifically focusing on the 3'-UTR of retinoic acid-inducible gene-I (RIG-I).

Main Results:

  • miR-545 expression was significantly decreased in OSCC tissues compared to normal tissues.
  • Overexpression of miR-545 suppressed proliferation and migration of HSC4 cells, while its inhibition promoted these processes.
  • miR-545 directly targets the 3'-UTR of RIG-I, and a negative correlation was observed between miR-545 and RIG-I mRNA levels in OSCC tissues.

Conclusions:

  • The study identifies miR-545 as a tumor suppressor microRNA in oral squamous cell carcinoma.
  • Decreased miR-545 levels contribute to OSCC progression by potentially upregulating RIG-I.
  • miR-545 represents a potential therapeutic target for OSCC treatment.
Keywords:
cell proliferationmicroRNA-545migrationoral squamous cell carcinoma

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