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CGA gene (coding for the alpha subunit of glycoprotein hormones) overexpression in ER alpha-positive prostate tumors

Ivan Bièche1, Alain Latil, Béatrice Parfait

  • 1Laboratoire de Génétique Moléculaire-UPRES JE 2195, Faculté des Sciences Pharmaceutiques et Biologiques de Paris, Université René Descartes-Paris V, 4 Avenue de l'Observatoire, F-75006 Paris, France.

European Urology
|August 16, 2002
PubMed
Abstract

Insights

The CGA gene is overexpressed in 39% of prostate tumors, correlating with estrogen receptor alpha. This suggests CGA may be a novel molecular marker and therapeutic target for prostate cancer.

Area of Science:

  • Endocrinology
  • Oncology
  • Molecular Biology

Background:

  • The role of estrogen and its receptors in prostate cancer is not fully understood.
  • Estrogen- and antiestrogen therapies are paradoxically used for advanced prostate cancer.
  • The CGA gene, encoding the alpha subunit of glycoprotein hormones, was recently identified as an estrogen receptor alpha-responsive gene in breast cancer cells.

Purpose of the Study:

  • To investigate the role of the CGA gene in prostate cancer.
  • To determine if CGA is dysregulated in prostate tumors.
  • To explore the association between CGA expression and estrogen receptor status in prostate cancer.

Main Methods:

  • Quantification of CGA mRNA in benign prostatic hyperplasia (BPH) and prostate tumor (TP) tissues using real-time quantitative reverse transcriptase-polymerase chain reaction (RT-PCR).
  • Analysis of CGA overexpression relative to normal prostate tissues (NP).
  • Correlation analysis of CGA expression with estrogen receptor alpha (ER alpha), estrogen receptor beta (ER beta), and androgen receptor (AR) expression.

Main Results:

  • CGA overexpression was observed in 39% of prostate tumors, with levels significantly higher than in normal prostate tissues.
  • No CGA overexpression was detected in benign prostatic hyperplasia samples.
  • CGA gene overexpression correlated significantly with normal ER alpha expression but not with ER beta or AR expression.

Conclusions:

  • The CGA gene represents a novel dysregulated pathway in prostate cancer.
  • CGA may serve as a potential molecular marker for prostate cancer diagnosis and prognosis.
  • CGA warrants further investigation as a potential therapeutic target in prostate cancer treatment.

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