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Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
09:07

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Direct cooperation between androgen receptor and E2F1 reveals a common regulation mechanism for androgen-responsive

D M Altintas1, M S Shukla, D Goutte-Gattat

  • 1Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, F-69346 Lyon Cedex 07, France.

Molecular Endocrinology (Baltimore, Md.)
|July 10, 2012
PubMed

Insights

Androgens regulate ATAD2 gene expression in prostate cells via androgen receptor (AR) and E2F1 collaboration. This interaction involves chromatin looping, impacting prostate cancer development.

Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • ATAD2 acts as a coactivator for androgen receptor (AR) and MYC.
  • Androgen signaling is crucial in prostate cell function and cancer.

Purpose of the Study:

  • To elucidate the regulatory mechanisms of ATAD2 gene expression by androgens in prostate cells.
  • To investigate the interplay between AR and E2F1 in ATAD2 regulation.

Main Methods:

  • Gene expression analysis
  • Chromatin immunoprecipitation (ChIP)
  • Knockdown experiments
  • Chromatin conformation analysis

Main Results:

  • ATAD2 expression is directly regulated by AR through an AR binding sequence (ARBS) in its distal enhancer.
  • AR and E2F1 transcription factors collaborate and physically interact to regulate ATAD2.
  • Androgen-dependent chromatin looping occurs between ARBS and E2F1 binding sites at the ATAD2 promoter.
  • Identified similar regulatory mechanisms in genes overexpressed in prostate cancer.

Conclusions:

  • AR and E2F1 cooperatively regulate ATAD2 expression in prostate cells via androgen-dependent chromatin looping.
  • This regulatory mechanism may contribute to prostate tumor development by affecting key oncogenes.

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