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Gradual decrease in spermatogenesis caused by chronic stress.

Lizbeth Juárez-Rojas1, Rosa María Vigueras-Villaseñor2, Fahiel Casillas1

  • 1Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana Iztapalapa, San Rafael Atlixco 186, C.P. 09340, Mexico City, Mexico.

Acta Histochemica
|February 26, 2017
PubMed
Summary

Chronic stress severely damages testicular germ cells, leading to infertility in males. This study observed gradual, progressive damage to sperm cells and reduced testosterone levels with increased stress duration.

Keywords:
CorticosteroneGerm cellsSeminiferous epitheliumSpermatogenesisStressTestisTestosterone

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Area of Science:

  • Reproductive Biology
  • Endocrinology
  • Toxicology

Background:

  • Chronic stress negatively impacts male reproductive health, causing reduced sperm quality and testicular damage.
  • Previous research indicates stress affects oxidative status and induces apoptosis in testes, but germ cell morphology changes remain understudied.

Purpose of the Study:

  • To investigate the morphological alterations in testicular germ cells of male rats subjected to varying durations of chronic stress.
  • To correlate these morphological changes with hormonal (testosterone, corticosterone) and spermatogenic parameters.

Main Methods:

  • Adult male rats were exposed to chronic stress via cold-water immersion (ICW) for 3, 8, 20, or 50 days.
  • Testicular tissue was examined for germ cell morphology and seminiferous tubule structure.
  • Plasma levels of testosterone and corticosterone were measured.

Main Results:

  • Chronic stress led to progressive germ cell loss and disrupted spermatogenesis across all stress durations (3-50 days).
  • Degenerative signs in seminiferous tubules included basal epithelial vacuoles and exfoliated germ cells.
  • Testosterone levels decreased, while corticosterone levels increased, correlating with stress exposure.

Conclusions:

  • Chronic stress induces significant, dose-dependent morphological damage to testicular germ cells, contributing to male infertility.
  • Hormonal imbalances, specifically reduced testosterone and elevated corticosterone, are associated with stress-induced testicular damage.