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Updated: May 28, 2026
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In Vitro Growth of Mouse Preantral Follicles Under Simulated Microgravity
Published on: December 17, 2017
The effect of microgravity on tissue structure and function of rat testis
1Department of Veterinary Pathology, Key Laboratory of Zoonosis of Ministry of Agriculture, China Agricultural University, Beijing.
Summary
Microgravity exposure causes significant, irreversible damage to rat testes, affecting structure and function. This spaceflight simulation reveals elevated stress markers and reduced androgen receptors, impacting male reproductive health.
Area of Science:
- Reproductive Biology
- Space Medicine
- Toxicology
Background:
- Understanding the impact of microgravity on reproductive health is crucial for long-duration space missions.
- The tail-suspension model is a widely used method to simulate microgravity's effects on animals.
Purpose of the Study:
- To investigate the effects of simulated microgravity on the testicular structure and function in adult male rats.
- To assess the molecular mechanisms underlying microgravity-induced testicular damage.
Main Methods:
- Adult male Wistar rats were subjected to tail suspension for 7 or 14 days to simulate microgravity.
- Histological and electron microscopy were used to evaluate testicular morphology.
- Immunohistochemistry assessed the expression of HSP70, bax/bcl-2, and androgen receptor (AR).
Main Results:
- Simulated microgravity induced significant pathological lesions in rat testes.
- Overexpression of HSP70 and increased apoptotic cells were observed, indicating cellular stress and damage.
- A significant decrease in androgen receptor (AR) expression was noted in suspended rats.
- Longer suspension periods exacerbated testicular damage, with some injuries proving irreversible.
Conclusions:
- Simulated microgravity causes severe, irreversible damage to the structure and function of rat testes.
- Microgravity-induced testicular injury involves cellular stress, apoptosis, and downregulation of AR.
- These findings highlight potential risks to male reproductive health in spaceflight environments.
