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DES induced sperm destruction in Lakeview hamsters
Summary
Diethylstilbestrol (DES) significantly harms hamster sperm production and testicular size, even at lower doses. Recovery showed abnormal sperm, indicating lasting reproductive toxicity from DES exposure.
Area of Science:
- Reproductive toxicology
- Endocrinology
- Mammalian reproductive biology
Background:
- Diethylstilbestrol (DES) is a synthetic estrogen with known endocrine-disrupting properties.
- Understanding DES toxicity is crucial for assessing risks associated with environmental or therapeutic exposures.
Purpose of the Study:
- To investigate the toxic effects of sublethal doses of DES on male reproductive parameters in Lakeview hamsters.
- To evaluate the dose-dependent toxicity and potential for recovery of sperm production and testicular function following DES exposure.
Main Methods:
- Lakeview hamsters received five consecutive intraperitoneal injections of DES at 8, 40, or 200 mg/kg.
- Reproductive parameters including testis weight, caudal sperm count, sperm morphology, and body weight were assessed at 1, 4, and 10 weeks post-treatment.
Main Results:
- DES doses of 8 mg/kg and higher led to complete destruction of caudal sperm and a significant reduction in testes size (to ~10% of control) by 10 weeks.
- While some sperm production resumed at the 8 mg/kg dose by week 10, over 50% of the recovered sperm exhibited abnormal morphology.
- Body weights remained stable initially, then increased by approximately 25% at the 10-week mark.
Conclusions:
- Sublethal DES exposure causes severe and persistent damage to sperm production and testicular structure in hamsters.
- Even doses that allow partial recovery result in a high incidence of sperm abnormalities, suggesting long-term reproductive impairment.