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A20 gene expression is regulated by TNF, Vitamin D and androgen in prostate cancer cells

Olga Golovko1, Nadja Nazarova, Pentti Tuohimaa

  • 1Department of Anatomy, Medical School, University of Tampere, FIN-33014 Tampere, Finland. olga.golovko@uta.fi

The Journal of Steroid Biochemistry and Molecular Biology
|May 3, 2005
PubMed

Insights

A20 gene expression, higher in resistant prostate cancer cells, is regulated by tumor necrosis factor (TNF), Vitamin D, and androgen. This suggests A20

Area of Science:

  • Molecular biology
  • Cancer research
  • Endocrinology

Background:

  • A20 is a TNF-inducible gene encoding a protein with anti-apoptotic functions.
  • Prostate cancer cell lines LNCaP (Vitamin D and TNF-sensitive) and PC-3 (resistant) were used to study A20 gene expression.
  • Basal A20 mRNA levels are significantly higher in PC-3 cells compared to LNCaP cells, correlating with resistance.

Purpose of the Study:

  • To investigate the role of A20 gene expression in prostate cancer.
  • To analyze the regulation of A20 by TNF, Vitamin D (calcitriol), and androgen in different prostate cancer cell lines.

Main Methods:

  • Quantitative real-time RT-PCR was employed to measure A20 mRNA levels.
  • LNCaP and PC-3 cells were treated with TNF, calcitriol, and androgen to assess gene expression changes.

Main Results:

  • PC-3 cells exhibited higher basal A20 mRNA production than LNCaP cells.
  • TNF induced A20 gene expression in both cell lines.
  • Calcitriol (10nM) down-regulated A20 mRNA in LNCaP cells within 3-9 hours.
  • Androgen up-regulated A20 mRNA in LNCaP cells, peaking at 6 hours.

Conclusions:

  • A20 gene expression is differentially regulated by TNF, Vitamin D, and androgen in prostate cancer cells.
  • A20 may play a role in regulating cell proliferation in prostate cancer through these signaling pathways.

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