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Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
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Related Experiment Video

Updated: Jun 1, 2026

Murine Prostate Micro-dissection and Surgical Castration
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Published on: May 11, 2016

Differing levels of testosterone and the prostate: a physiological interplay.

S Larry Goldenberg1, Anthony Koupparis, Michael E Robinson

  • 1Department of Urologic Sciences, University of British Columbia, Level 6, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada. l.gold@ubc.ca

Nature Reviews. Urology
|June 2, 2011
PubMed
Summary

Testosterone replacement therapy (TRT) may not increase prostate cancer risk beyond a certain threshold. Benefits for muscle mass and libido follow a dose-response pattern, distinct from prostate effects.

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Published on: March 2, 2011

Area of Science:

  • Endocrinology
  • Urology
  • Oncology

Background:

  • Prostate cancer risk and testosterone replacement therapy (TRT) remain subjects of debate.
  • Extensive research exists on androgenic effects on prostate cells, but clinical data on physiological responses to varying testosterone levels are limited.
  • The prostate gland is androgen-dependent and sensitive, with key processes activated at a testosterone threshold.

Purpose of the Study:

  • To critically evaluate existing androgen research regarding testosterone's influence on prostate cellular growth.
  • To differentiate between threshold-dependent and dose-response effects of testosterone on the prostate.
  • To discuss testosterone's impact on prostate cells in hypogonadal and eugonadal states.

Main Methods:

  • Review of classic and contemporary androgen research.
  • Analysis of physiological responses in prostate tissues across a spectrum of serum testosterone levels.
  • Examination of clinical data on TRT and prostate health.

Main Results:

  • No compelling evidence suggests testosterone levels above a specific threshold causally increase prostate cancer risk or alter prostate biology.
  • Positive effects of TRT on muscle mass, libido, and erectile function appear to be dose-dependent.
  • The prostate's response to testosterone may be characterized by a threshold effect, separate from dose-response benefits.

Conclusions:

  • Increasing testosterone beyond the prostate's saturation threshold does not appear to drive prostate cancer progression.
  • TRT benefits for sexual function and body composition are likely dose-dependent and distinct from the prostate's threshold-based sensitivity.
  • Further research is needed to fully elucidate the complex relationship between testosterone levels and prostate health.