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Related Experiment Videos

Glucocorticoids: their role on gonadal function and LH secretion

L N Contreras1, A M Masini, M M Danna

  • 1Departamento de Endocrinología Instituto de Investigaciones Médicas Dott. Alfredo Lanari, UBA, Argentina.

Minerva Endocrinologica
|June 1, 1996
PubMed
Summary

Chronic glucocorticoid (GC) therapy in men lowers testosterone levels, impacting gonadal function. However, luteinizing hormone (LH) reserve remains normal, suggesting the pituitary response is preserved.

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Area of Science:

  • Endocrinology
  • Reproductive Medicine
  • Pharmacology

Background:

  • Glucocorticoids (GCs) are widely used for their anti-inflammatory and immunosuppressive properties.
  • Chronic administration of supraphysiological GC doses can lead to adverse effects on endocrine function.
  • The impact on gonadal function and luteinizing hormone (LH) reserve requires further investigation.

Purpose of the Study:

  • To assess gonadal function and LH reserve in men undergoing chronic therapy with supraphysiological GC doses.
  • To evaluate the effects of GC therapy on testosterone levels and sexual health.
  • To determine the pituitary's response to gonadotropin-releasing hormone (GnRH) stimulation.

Main Methods:

  • Clinical evaluation of 17 male subjects on chronic GC therapy.

Related Experiment Videos

  • Measurement of sex hormone-binding globulin (SHBG), total, free, and bioavailable testosterone.
  • Gonadotropin-releasing hormone (GnRH) stimulation test with LH level assessment.
  • Comparison with four healthy male controls.

    • Main Results:

    • Patients reported decreased libido (58%) and impotence (52%).
    • Significantly lower total, free, and bioavailable testosterone levels were observed compared to controls (p < 0.01, p < 0.05, p < 0.05).
    • SHBG levels remained unchanged, and baseline and stimulated LH secretion were normal.

    Conclusions:

    • Chronic supraphysiological GC administration impairs gonadal function by reducing sexual steroids.
    • LH secretion, both baseline and stimulated, is not affected by chronic GC therapy.
    • Priming with physiological GnRH doses enhances pituitary responsiveness to higher GnRH doses.