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Published on: March 30, 2019

Tumour suppressive microRNA-874 regulates novel cancer networks in maxillary sinus squamous cell carcinoma

N Nohata1, T Hanazawa, N Kikkawa

  • 1Department of Functional Genomics, Chiba University Graduate School of Medicine, 1-8-1 Inohana Chuo-ku, Chiba 260-8670, Japan.

British Journal of Cancer
|August 18, 2011
PubMed
Abstract

Insights

MicroRNA-874 (miR-874) is significantly reduced in maxillary sinus squamous cell carcinoma (MSSCC). This tumor suppressor miRNA inhibits cancer cell proliferation and invasion by regulating PPP1CA, offering new insights into MSSCC oncogenesis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA (miRNA) expression profiling of maxillary sinus squamous cell carcinoma (MSSCC) revealed significantly reduced levels of miR-874 in cancer cells.
  • This downregulation suggests a potential role for miR-874 in the development and progression of MSSCC.

Purpose of the Study:

  • To investigate the functional significance of miR-874 in MSSCC cancer cells.
  • To identify novel cancer networks regulated by miR-874 in MSSCC.

Main Methods:

  • Quantitative PCR (qPCR) was employed to identify downregulated miRNAs in clinical MSSCC specimens.
  • Bioinformatic analysis was used to predict and validate molecular targets of miR-874.

Main Results:

  • miR-874 demonstrated tumor suppressive functions, inhibiting cancer cell proliferation and invasion.
  • Protein phosphatase 1 catalytic subunit alpha (PPP1CA) was identified as a direct molecular target of miR-874.
  • Overexpression of PPP1CA was observed in MSSCC, and its silencing inhibited cancer cell proliferation and invasion.

Conclusions:

  • Downregulation of miR-874 is a frequent event in MSSCC, supporting its role as a tumor suppressor.
  • miR-874 directly regulates PPP1CA, which may function as an oncogene in MSSCC.
  • The identified miR-874-regulated pathways offer novel insights into MSSCC oncogenesis.

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