Article (Scientific journals)
Pubertal timing after neonatal diethylstilbestrol exposure in female rats: Neuroendocrine vs peripheral effects and additive role of prenatal food restriction.
Franssen, Delphine; Ioannou, Yiannis S.; Alvarez-Real, Alexandra et al.
2014In Reproductive Toxicology, (44), p. 63-72
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Keywords :
Diethylstilbestrol; Hypothalamus; Kisspeptin; Leptin; Puberty
Abstract :
[en] We studied the effects of neonatal exposure to diethylstilbestrol (DES) on pubertal timing in female rats. We examined associated neuroendocrine changes and effects of prenatal food restriction. Age at vaginal opening was advanced after exposure to 10mug/kg/d of DES and delayed after 1mug/kg/d (subcutaneous injections). Using this lower dose, pulsatile GnRH secretion was slower at 25 days of age. Both doses reduced KiSS1 mRNA levels at 15 days of age. Using functional Kisspeptin promoter assay, 1 or 10muM DES reduced or increased KISS1 transcription, respectively. Leptin stimulatory effect on GnRH secretion in vitro (15 days of age) was reduced after prenatal food restriction and neonatal DES exposure (higher dose), both effects being cumulative. Thus, alterations in pubertal timing by DES neonatally are not unequivocally toward precocity, the level of exposure being critical. We provide evidence of neuroendocrine disruption and interaction with prenatal food availability.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Endocrinology, metabolism & nutrition
Pediatrics
Author, co-author :
Franssen, Delphine ;  Université de Liège - ULiège > Département des sciences cliniques > Pédiatrie
Ioannou, Yiannis S.
Alvarez-Real, Alexandra
Gerard, Arlette
Mueller, Johanna K.
Heger, Sabine
Bourguignon, Jean-Pierre ;  Université de Liège - ULiège > Département des sciences cliniques > Pédiatrie
Parent, Anne-Simone ;  Université de Liège - ULiège > Département des sciences cliniques > Pédiatrie
Language :
English
Title :
Pubertal timing after neonatal diethylstilbestrol exposure in female rats: Neuroendocrine vs peripheral effects and additive role of prenatal food restriction.
Publication date :
April 2014
Journal title :
Reproductive Toxicology
ISSN :
0890-6238
eISSN :
1873-1708
Publisher :
Elsevier, Netherlands
Issue :
44
Pages :
63-72
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2013 Elsevier Inc. All rights reserved. Epub ahead of print
Available on ORBi :
since 23 January 2014

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