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Factors that mediate and modulate androgen action.

M J McPhaul1

  • 1Department of Internal Medicine, Division of Endocrinology and Metabolism, University of Texas Southwestern Medical Center, Dallas, TX 75390-8857, USA. Michael.McPhaul@utsouthwestern.edu

The Journal of Investigative Dermatology. Symposium Proceedings
|August 5, 2003
PubMed
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Testosterone and 5alpha-dihydrotestosterone (DHT) are key androgens in mammals, influencing development and adult functions. Their diverse effects across tissues are primarily mediated by the androgen receptor gene, located on the X-chromosome.

Area of Science:

  • Endocrinology
  • Developmental Biology
  • Molecular Genetics

Background:

  • Androgens play crucial roles in mammalian embryogenesis and adult physiology.
  • Testosterone and 5alpha-dihydrotestosterone (DHT) are identified as the primary physiologic androgens.
  • Androgenic effects vary significantly across different tissues and cell types.

Purpose of the Study:

  • To elucidate the primary mediators of androgenic effects in mammals.
  • To understand the role of specific steroid metabolites in androgenic activity.
  • To investigate the genetic basis for androgen action.

Main Methods:

  • In vitro and in vivo assays to assess steroidic androgenic effects.
  • Genetic analysis to identify key genes involved in androgen signaling.

Related Experiment Videos

  • Biochemical studies to explore the mechanism of androgen action.

    • Main Results:

    • Multiple steroids exhibit androgenic effects in experimental assays.
    • Testosterone and its metabolite DHT are confirmed as principal physiologic androgens.
    • Evidence points to a single androgen receptor gene mediating androgen effects across tissues.

    Conclusions:

    • The androgen receptor, encoded on the X-chromosome, is the central mediator of androgenic actions.
    • Understanding androgen signaling is critical for comprehending developmental and physiological processes.
    • The findings highlight the conserved mechanism of androgen action in mammals.