Effects of neonatal exposure to a glyphosate-based herbicide on female rat reproduction

Paola I. Ingaramo, Jorgelina Varayoud, María M. Milesi, Marlise Guerrero Schimpf, Mónica Muñoz-De-toro, Enrique H. Luque

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

In this study, we investigated whether neonatal exposure to a glyphosate-based herbicide (GBH) alters the reproductive performance and the molecular mechanisms involved in the decidualization process in adult rats. Newborn female rats received vehicle or 2 mg/kg/day of a GBH on postnatal days (PND) 1, 3, 5 and 7. On PND90, the rats were mated to evaluate (i) the reproductive performance on gestational day (GD) 19 and (ii) the ovarian steroid levels, uterine morphology, endometrial cell proliferation, apoptosis and cell cycle regulators, and endocrine pathways that regulate uterine decidualization (steroid receptors/COUP-TFII/Bmp2/Hoxa10) at the implantation sites (IS) on GD9. The GBH-exposed group showed a significant increase in the number of resorption sites on GD19, associated with an altered decidualization response. In fact, on GD9, the GBH-treated rats showed morphological changes at the IS, associated with a decreased expression of estrogen and progesterone receptors, a downregulation of COUP-TFII (Nr2f2) and Bmp2 mRNA and an increased expression of HOXA10 and the proliferation marker Ki67(Mki67) at the IS. We concluded that alterations in endometrial decidualization might be the mechanism of GBH-induced post-implantation embryo loss.

Original languageEnglish (US)
Pages (from-to)403-415
Number of pages13
JournalReproduction
Volume152
Issue number5
DOIs
StatePublished - 2016
Externally publishedYes

ASJC Scopus subject areas

  • Embryology
  • Reproductive Medicine
  • Endocrinology
  • Obstetrics and Gynecology
  • Cell Biology

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