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Related Experiment Videos

Erectile and copulatory dysfunction in chronically diabetic BB/WOR rats.

F T Murray1, R D Johnson, M Sciadini

  • 1Department of Medicine, University of Florida, Gainesville 32610.

The American Journal of Physiology
|July 1, 1992
PubMed
Summary

Male rats with chronic diabetes exhibit reduced testosterone and erectile dysfunction, mirroring impotence seen in diabetic men. This dysfunction precedes ejaculatory issues, suggesting a valuable animal model for research.

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Area of Science:

  • Reproductive Endocrinology
  • Diabetic Complications
  • Animal Models of Disease

Background:

  • Diabetes mellitus is associated with sexual dysfunction in men.
  • The pituitary-testicular axis and sexual behaviors are crucial for male reproductive health.
  • Understanding the mechanisms of diabetic sexual dysfunction requires appropriate animal models.

Purpose of the Study:

  • To investigate the effects of chronic diabetes on the pituitary-testicular axis in male rats.
  • To assess the impact of diabetes on penile reflexes and copulatory behavior.
  • To evaluate the BB diabetic rat as a model for erectile and ejaculatory dysfunction in diabetic men.

Main Methods:

  • Male BB diabetic rats were studied from 10 to 40 weeks of diabetes.

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  • Hormone levels (testosterone, LH, FSH, prolactin) were measured, with and without stimulation.
  • Penile reflexes, copulatory behavior, and accessory sex organ weights were assessed.

    • Main Results:

    • Diminished serum testosterone and blunted response to hCG stimulation were observed.
    • Reduced penile reflexes and impaired copulatory behavior, including prolonged latencies, were noted.
    • Accessory sex organs and muscles showed significant size reduction in diabetic rats.

    Conclusions:

    • Chronically diabetic rats develop reduced testosterone and erectile dysfunction preceding ejaculatory dysfunction.
    • These findings closely resemble impotence observed in diabetic men.
    • The BB diabetic rat model is suitable for studying the mechanisms and treatment of male diabetic sexual dysfunction.