Reproductive Toxicity In Mice Research Articles

2-Bromopropane and reproductive toxicity in mice

2-Bromopropane and reproductive toxicity in mice

Reproductive toxicology of 1,3-diphenylguanidine: analysis of induced sperm abnormalities in mice and hamsters and reproductive consequences in mice.

The effects of 1,3-diphenylguanidine (DPG) on seminal cytology in hybrid mice and inbred Syrian golden hamsters and on testicular histology and reproductive toxicity in mice were monitored. Treatment consisted of chronic exposure of hamsters and mice to DPG in 0.025% acetic acid ad libitum. Sperm morphology and sperm count, testicular cytology and histology, and reproductive toxicity were monitored 1 wk after exposure. The results show that DPG induces (1) time- and dose-dependent morphologically anomalous sperm in mice and hamsters; (2) significant decreases in sperm count and testicular weight; (3) irregularly shaped seminiferous tubules characterized by the absence of a defined basement membrane, loss of interstitial cells, and limited number of spermatids and spermatozoa in the lumen of the tubules; and (4) reduced fertility indices, implants per pregnancy, and fetal mortality in mice. The coincidence of increased morphologically anomalous sperm and drastic reductions in fertility indices and implants per pregnancy is suggestive of developmental disturbances in the preleptotene and late-spermatogonial cells (5-7 wk after treatment).

Seminal Cytology and Reproductive Toxicology of N-Chloropiperidine

Induction of sperm abnormality in mice and hamster and reproductive toxicity in mice was examined following chronic exposures (ad libitum) to N-chloropiperidine (NCP). The results showed that significant levels of abnormal sperm in the NCP treated group were observed after five weeks of exposure. The time of the appearance of NCP-induced anomalous sperm suggested that the compound did not affect late spermatocytes and spermiogenesis. Reproductive toxicological analysis based on moles, implantations, and offspring per pregnancy revealed that while the toxic effect of ethylmethane sulfonate was evident within the first week of treatment, NCP-induced toxicity was observed only after five weeks of treatment. The data further showed that in matings where both parents were exposed to NCP, the frequencies of moles, implantations, and offspring per pregnancy were fewer than those observed in single parent exposure.