Related Experiment Video

Updated: Jun 18, 2025

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

Published on: December 19, 2018

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Mechanistic insights into steroid hormone-mediated regulation of the androgen receptor gene

Andrew D Gillen1, Irene Hunter1, Ekkehard Ullner2

  • 1Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Scotland, United Kingdom.

Plos One
|August 1, 2024
PubMed

Insights

The progesterone receptor (PR) represses androgen receptor (AR) gene expression, similar to AR itself. This novel mechanism involves PR binding to the AR gene, impacting hormone-dependent signaling and therapies.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Genetics

Background:

  • Androgen receptor (AR) expression is crucial for cellular responses to androgens and hormone therapies.
  • Understanding AR regulation is vital for therapeutic interventions in endocrine diseases and cancers.
  • Existing knowledge of AR autoregulation is incomplete, limiting therapeutic control.

Purpose of the Study:

  • To elucidate the mechanisms of androgen receptor gene autoregulation.
  • To investigate the role of progesterone receptor (PR) in controlling AR expression.
  • To identify novel pathways regulating AR gene transcription.

Main Methods:

  • Analysis of gene expression patterns.
  • Chromatin immunoprecipitation assays to identify receptor binding sites.
  • Histone modification analysis (deacetylation) in the AR gene promoter region.
  • 3C/4C assays to study DNA looping.

Main Results:

  • Progesterone receptor (PR) mediates transcriptional repression of the AR gene, similar to AR.
  • PR binds to specific response elements within the AR gene locus.
  • Hormone-dependent histone deacetylation in the AR 5'UTR and intron 2-TSS looping are involved in repression.
  • A novel pathway for AR gene regulation by PR in response to hormone stimulation was identified.

Conclusions:

  • Progesterone receptor plays a significant role in regulating androgen receptor expression.
  • This novel regulatory pathway offers new insights into hormone-dependent signaling.
  • Understanding this mechanism could lead to improved therapeutic strategies for hormone-related diseases and cancers.

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