A role for GATA-2 in transition to an aggressive phenotype in prostate cancer through modulation of key androgen-regulated genes

Oncogene. 2009 Oct 29;28(43):3847-56. doi: 10.1038/onc.2009.243. Epub 2009 Aug 17.

Abstract

GATA-2, a member of the GATA family of transcription factors, is involved in androgen receptor (AR) signaling, however, little is known regarding its role in prostate cancer. Here, we report that GATA-2 is expressed in a substantial proportion of prostate cancers and that high expression of GATA-2 is associated with biochemical recurrence and distant metastatic progression in a validation set of 203 cancers. In vitro data show that GATA-2 is directly recruited to the promoter region of the AR upon androgen stimulation of LNCaP prostate cancer cells with 5alpha-dihydroxytestosterone (DHT) for 24 h. Ectopic GATA-2 expression causes the induction of AR transcript levels under androgen-depleted conditions (P<0.05). The expression of the AR target gene, AZGP1, is induced upon androgen stimulation and this effect is repressed by GATA-2. In contrast, GATA-2 significantly increases transcript levels of KLK2, which increases further in a time-dependent manner on DHT treatment and in the presence of GATA-2. These results indicate that upregulation of GATA-2 may contribute to the progression to aggressive prostate cancer through modulation of expression of AR and key androgen-regulated genes, one of which, AZGP1, is associated with the progression to metastatic disease.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carrier Proteins / genetics
  • GATA2 Transcription Factor / analysis
  • GATA2 Transcription Factor / physiology*
  • Gene Expression Regulation, Neoplastic*
  • Glycoproteins / genetics
  • Humans
  • Male
  • Phenotype
  • Promoter Regions, Genetic
  • Prostatic Neoplasms / genetics
  • Prostatic Neoplasms / pathology*
  • Receptors, Androgen / analysis
  • Receptors, Androgen / genetics
  • Tissue Kallikreins / genetics

Substances

  • AZGP1 protein, human
  • Carrier Proteins
  • GATA2 Transcription Factor
  • GATA2 protein, human
  • Glycoproteins
  • Receptors, Androgen
  • Tissue Kallikreins