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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Neonatal exposure to ethinylestradiol increases ventral prostate growth and promotes epithelial hyperplasia and inflammation in adult male gerbils

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Author(s):
Falleiros-Junior, Luiz R. ; Perez, Ana P. S. ; Taboga, Sebastiao R. ; dos Santos, Fernanda C. A. ; Vilamaior, Patricia S. L.
Total Authors: 5
Document type: Journal article
Source: International Journal of Experimental Pathology; v. 97, n. 5, p. 380-388, OCT 2016.
Web of Science Citations: 3
Abstract

The aim of this study was to analyse morphologically the ventral prostate of adult Mongolian gerbils exposed to ethinylestradiol (EE) during the first week of postnatal development. Lactating females received daily, by gavage, doses of 10 mu g/kg of EE diluted in 100 mu l of mineral oil from the 1st to 10th postnatal day of the pups (EE group). In the control group (C), the lactating females received only the vehicle. Upon completing 120 days of age, the male offspring were euthanized and the prostates collected for analyses. We employed morphological, stereological-morphometrical, immunohistochemical and ultrastructural methods. The results showed that the postnatal exposure to EE doubled the prostatic complex weight, increasing the epithelial and stromal compartments, in addition to the secretory activity of the ventral lobe of the prostate. All glands exposed to EE showed strong stromal remodelling, and some foci of epithelial hyperplasia and inflammatory infiltrate in both luminal and epithelial or stromal compartments. Cells positive for anti-AR and antiPCNA reactions increased into the epithelial and stromal tissues. ER alpha-positive cells, which are normally found in the stromal compartment of intact prostates, were frequently observed in the prostatic epithelium of treated animals. This study demonstrated that the exposure to EE during postnatal development causes histophysiological alterations in this gland, predisposing to the development of prostatic lesions during life. These results are important for public health, considering that women worldwide have commonly used EE. Moreover, the bioaccumulation of this chemical has increased in different ecosystems. (AU)

FAPESP's process: 12/12607-4 - Morphophysiological characterization of the prostate of adults and senile gerbils exposed to ethinylestradiol during neonatal period
Grantee:Patricia Simone Leite Vilamaior
Support Opportunities: Regular Research Grants