Sperm quality in mice acutely treated with parathion
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Published on: December 12, 2011
1Faculty of Basic Sciences, Catholic University of Temuco and Biology of Reproduction Unit, Program of Morphology, ICBM, Santiago, Chile.
Aim:
To investigate the toxic effect of a single injection of the organophosphorous agropesticide, parathion, on spermatogenesis in immature male mice.
Methods:
Seven-day old mice received a single injection of parathion intraperitoneally at a dose of 1/3 LD50. The epididymal sperm count, sperm morphology and chromatin thermal stability were analyzed 28 and 50 days after injection.
Results:
Sperm counts were decreased and teratozoospermia and thermal denaturation of DNA increased after parathion injection. Sperm parameters were changed to a greater extent in younger animals, denoting a higher lability of spermatogenic process at its beginning. The damages could recover a long time after parathion administration.
Conclusion:
Organophosphorous agropesticides are testicular toxicants, eliciting reversible cytotoxic and cytogenetic alterations in germ cells.
Insights
Single parathion pesticide exposure harms sperm production and DNA in young mice, causing reversible damage. This highlights the testicular toxicity of organophosphorus pesticides.
Area of Science:
- Toxicology
- Reproductive Biology
- Environmental Health
Background:
- Organophosphorus pesticides are widely used in agriculture.
- Exposure to pesticides can pose risks to human and animal health.
- Spermatogenesis is a critical process for male fertility.
Purpose of the Study:
- To evaluate the toxic effects of parathion, an organophosphorus pesticide, on spermatogenesis in immature male mice.
- To assess the impact of a single parathion dose on sperm count, morphology, and DNA stability.
Main Methods:
- Immature male mice (7 days old) received a single intraperitoneal injection of parathion (1/3 LD50).
- Epididymal sperm count, sperm morphology, and chromatin thermal stability were analyzed 28 and 50 days post-injection.
Main Results:
- Parathion administration led to decreased sperm counts and increased teratozoospermia (abnormal sperm morphology).
- Increased thermal denaturation of sperm DNA indicated DNA damage.
- Effects were more pronounced in younger mice, suggesting higher sensitivity during early spermatogenesis.
- Observed damages showed potential for long-term recovery.
Conclusions:
- Organophosphorus pesticides, like parathion, act as testicular toxicants.
- Parathion exposure induces reversible cytotoxic and cytogenetic alterations in germ cells.
- These findings underscore the reproductive risks associated with pesticide exposure.
