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miR-211 and MITF modulation by Bcl-2 protein in melanoma cells

Teresa De Luca1, Andrea Pelosi2, Daniela Trisciuoglio1

  • 1Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, Rome, Italy.

Molecular Carcinogenesis
|November 25, 2015
PubMed

Insights

Bcl-2 oncogene overexpression in melanoma reduces oncosuppressor miR-211 levels, impacting cell migration and gene expression. This suggests Bcl-2 influences melanoma progression by modulating miR-211 and related pathways.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Melanoma, a deadly skin cancer, involves genetic alterations, including the Bcl-2 oncogene.
  • MicroRNAs (miRNAs) are key regulators of melanoma development; miR-211 acts as an oncosuppressor.

Purpose of the Study:

  • To investigate the correlation between Bcl-2 oncogene expression and miR-211 levels in human melanoma.
  • To understand how Bcl-2 influences melanoma progression through miR-211 modulation.

Main Methods:

  • Utilized human melanoma cell lines with stable Bcl-2 overexpression.
  • Employed Western blot, quantitative real-time PCR, immunofluorescence, and chromatin immunoprecipitation assays.

Main Results:

  • Bcl-2 overexpression led to reduced pri-miR-211, miR-211, TRPM1, and MLANA expression.
  • Increased expression of miR-211 target genes and enhanced cell migration were observed.
  • Decreased nuclear localization of microphthalmia-associated transcription factor (MITF) and reduced promoter recruitment were noted.

Conclusions:

  • Bcl-2 oncogene overexpression negatively impacts oncosuppressor miR-211 expression in melanoma.
  • Bcl-2 modulates melanoma cell migration and gene expression potentially via MITF regulation.
  • These findings highlight a novel mechanism of melanoma progression involving Bcl-2 and miR-211.
Keywords:
Bcl-2melanomamicroRNA

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