Maternal exposure of triclosan causes fetal development restriction and female reproductive alterations in rat offspring / A exposição materna ao triclosan causa restrição ao desenvolvimento fetal e alterações reprodutivas femininas na prole de ratos

Authors

  • Eduardo Deon Fortunato Brazilian Journals Publicações de Periódicos, São José dos Pinhais, Paraná
  • João Paulo de Arruda Amorim
  • Romário Willian Welter
  • Guilherme Bitencourt
  • Elaine Manoela Porto Amorim

DOI:

https://doi.org/10.34117/bjdv6n4-154

Keywords:

Triclosan, endocrine disruptor, puberty, oestrous cycle, ovary, folliculogenesis, rat.

Abstract

Triclosan (TCS) is an antimicrobial agent, mainly used in manufactured care products, have been included as endocrine disrupters. The aim this study evaluated the effects of maternal exposure to TCS, during pregnancy and lactation, in the puberty, oestrous cycle and foliculogenisis in rat offspring. Therefore, thirty-two Wistar rat dams were distributed into 4 experimental groups (8 mothers/group), and gavage daily, throughout pregnancy and lactation, as follows: Group I - control: received only corn oil by gavage; Group II: received TCS diluted in corn oil at a dose of 75 mg/kg/day; Group III: TCS diluted in corn oil at a dose of 150mg/kg/day; Group IV: TCS diluted in corn oil at a dose of 300mg/kg/day. One female pup of each mother was selected and 90 days-old the female offspring were euthanized. The results showed the levels thyroid hormones thyroxine (T4) and triiodothyronine (T3) were reduced in the TCS mother, the thyroid stimulating hormone (TSH) were increases. The main litter weight was significativly minor in all TCS treated group animals; and the TCS exposed animals showed delay in the vaginal opening day and first estrous, indicative of delay in the onset of puberty, deregulation of oestrous cycle and decreased folliculogenic activity. We conclude that maternal exposure to triclosan during pregnancy and lactation causes intrauterine growth restriction, delay in the onset of puberty, deregulation of the oestrous cycle and reduction of folliculogenic activity in rat offspring.

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Published

2020-04-09

How to Cite

Fortunato, E. D., Amorim, J. P. de A., Welter, R. W., Bitencourt, G., & Amorim, E. M. P. (2020). Maternal exposure of triclosan causes fetal development restriction and female reproductive alterations in rat offspring / A exposição materna ao triclosan causa restrição ao desenvolvimento fetal e alterações reprodutivas femininas na prole de ratos. Brazilian Journal of Development, 6(4), 18745–18764. https://doi.org/10.34117/bjdv6n4-154

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