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Androgen action

A K Roy1, B Chatterjee

  • 1Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio 78284, USA.

Critical Reviews in Eukaryotic Gene Expression
|January 1, 1995
PubMed
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Androgens like testosterone regulate male reproductive functions via the androgen receptor (AR). Specific molecular interactions ensure precise gene regulation, crucial for development and preventing disorders.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Reproductive Science

Background:

  • Androgens, C-19 steroids, are critical for male reproductive function.
  • Testosterone and 5 alpha-dihydrotestosterone (DHT) are key ligands for the androgen receptor (AR).
  • Ligand-activated AR functions as a nuclear transcription factor mediating androgenic effects.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying androgen action and receptor specificity.
  • To understand how androgenic signals are amplified and inactivated.
  • To explore the implications of androgen action for reproductive development and disease.

Main Methods:

  • Analysis of androgen receptor (AR) binding and activation.
  • Investigation of enzymatic pathways for androgen metabolism (activation/inactivation).

Related Experiment Videos

  • Examination of gene regulation by androgens and associated nuclear factors.

    • Main Results:

    • Androgen receptor (AR) exhibits high specificity despite shared DNA elements with other steroid receptors.
    • Conversion to DHT amplifies androgenic signals and prolongs action due to longer AR half-life.
    • Enzymatic inactivation pathways (e.g., 17 beta-hydroxysteroid dehydrogenase, androgen sulfotransferase) regulate androgen levels.

    Conclusions:

    • Androgen specificity is achieved through ligand activation, nuclear factor interactions, and gene regulation.
    • Mutations affecting androgen action lead to developmental abnormalities and androgen-insensitivity syndromes.
    • Understanding androgen action facilitates the development of therapies for conditions like prostatic hypertrophy and neoplasia.