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Histological Analysis of Reproductive System in Low-Dose Nonylphenol-treated F1 Female Mice

  • Kim, Yong-Bin (Dept. of Biotechnology, Sangmyung University) ;
  • Cheon, Yong-Pil (Division of Developmental Biology and Physiology, School of Biological Sciences and Chemistry, Sungshin University) ;
  • Choi, Donchan (Dept. of Life Science, College of Environmental Sciences, Yong-In University) ;
  • Lee, Sung-Ho (Dept. of Biotechnology, Sangmyung University)
  • Received : 2020.06.19
  • Accepted : 2020.09.07
  • Published : 2020.09.30

Abstract

Previously, we reported adverse effects of low-dose nonylphenol (NP) exposure on the reproductive parameters of F1 female mice. In the present study we further investigated the pathohistological effect of NP exposure on the reproductive organs in F1 female mice. NP exposures were continuously conducted from parental pre-mating period until the postnatal day (PND) 33 of F1 offspring for vaginal examination. Mice were sacrificed on PND 30 and the reproductive tissue weights were measured. The initial (at PND 21) body weights of the NP-50 group animals were significantly lower than those of control group animals, and the weight deficit were recovered when the terminal (PND 33) body weights were measured. Early vaginal opening was found in NP group animals (p<0.05). Pathohistological studies revealed that NP-treated F1 animals showed prominent increase in the ovarian follicle numbers (p<0.01), and decrease in the diameter of uterine myometrium (p<0.01), and increase in the diameter of luminal epithelium (p<0.05). The present study demonstrated that the subchronic low-dose NP exposure induced early beginning of puberty and pathohistological abnormalities in ovary and uterus of F1 mice. Further studies are needed to achieve a better understanding on the action mechanism of NP in pubertal onset and to find a way to avoid a hazardous situation provoked by NP exposure.

Keywords

References

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