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DNA content in the mouse spermatogonia B and spermatid nuclei during treatment with insecticides
Abstract:
The DNA content in nuclei of germ cells: spermatogonia B and spermatides in the maturation phase of male mice receiving commercial insecticide preparations commonly used in this country was cytophotometrically measured. The following insecticides were tested: 1% Metox-30 solution, containing 30% of methoxychlorine (p,p-dimethoxydiphenyltrichlorethane), 0,3% solution of Sadofos-30 containing 30% of malathione (1,2-dicarboethoxyethyl-0,0-dimethyldithiophosphate) and 0,3% solution of Foschlor-50 containing about 50% trichlorfon (2,2,2-trichloro-1-hydroxyethyl-0,0-dimethyl-diphosphonate). It was found that a statistically significant number of spermatogonium B and spermatide nuclei in the phase of maturation of the animals treated with the insecticides exhibited an abnormal DNA content as compared with the nuclei of control animals. The chromatin of these nuclei is also more sensitive to acid hydrolysis in Feulgen reaction.
Insights
Common insecticides significantly altered DNA content in male mouse germ cells. Treated spermatogonia B and spermatides showed abnormal DNA levels and increased chromatin sensitivity.
Area of Science:
- Toxicology
- Reproductive Biology
- Genetics
Background:
- Pesticide exposure is a global concern.
- Understanding insecticide effects on reproductive health is crucial.
- Male germ cell DNA integrity is vital for fertility.
Purpose of the Study:
- To investigate the impact of common insecticides on male mouse germ cell DNA content.
- To assess changes in spermatogonia B and spermatide DNA during maturation.
- To evaluate chromatin sensitivity to acid hydrolysis post-insecticide exposure.
Main Methods:
- Cytophotometric measurement of DNA content in germ cell nuclei.
- Exposure of male mice to commercial insecticide preparations (Metox-30, Sadofos-30, Foschlor-50).
- Feulgen reaction to assess chromatin sensitivity to acid hydrolysis.
Main Results:
- Statistically significant abnormal DNA content observed in spermatogonia B and spermatides of treated mice.
- Increased sensitivity of chromatin to acid hydrolysis in germ cell nuclei from exposed animals.
- Variations in DNA content compared to control groups.
Conclusions:
- Commercial insecticides can induce significant alterations in male germ cell DNA content.
- Insecticide exposure may compromise reproductive health by affecting DNA integrity.
- Further research is needed to understand the long-term implications of these findings.