US EPA

3230541 

Journal Article 

Effect of maternal exposure to endocrine disrupting chemicals on reproduction and mammary gland development in female Sprague-Dawley rats 

Manservisi, F; Gopalakrishnan, K; Tibaldi, E; Hysi, A; Iezzi, M; Lambertini, L; Teitelbaum, S; Chen, J; Belpoggi, F 

2015 

Yes 

Reproductive Toxicology
ISSN: 0890-6238
EISSN: 1873-1708 

Elsevier Inc. 

OXFORD 

54 

110-119 

English 

25554385 

10.1016/j.reprotox.2014.12.013 

BCI:BCI201500529764 

has comment/response 5431409 [Email to Andre Weaver regarding follow up to questions to Manservisi et al 2015]
has comment/response 5431410 [Email to Andre Weaver regarding diethyl phthalate questions to Manservisi et al 2015]

The aim of the study is to determine whether low doses of "endocrine disrupting chemicals" (EDCs) affect the development and proliferative activity of the mammary glands (MGs). Adult parous/nulliparous female Sprague-Dawley (SD) rats were treated from post-natal day (PND) 1 until PND 180 with diethylphthalate (DEP), methylparaben (MPB), triclosan (TCS) and a mixture at doses comparable to human exposure. The doses (mg/kg b.w./day) were: DEP=0.173; MPB=0.105; TCS=0.05. EDC treatment resulted in mortality rates >20% in pups as early as lactation day 7. Significant morphological/histological changes were observed at the end of lactation in the MGs of EDC-treated dams. The total transcriptome profile as well as lactation-related genes in MGs also corroborate the morphological findings as more profound gene expression changes are present only at the weaning period. The study highlights the heightened sensitivity of the MGs during critical windows of exposure, particularly pregnancy and lactation, with an impact on pups' survival. 

Endocrine disruptors; Mammary glands; Rats; Windows of susceptibility