Endocrinology, Vol 124, 2568-2576, Copyright © 1989 by Endocrine Society

ARTICLES

Female gene expression in the seminal vesicle of mice after prenatal exposure to diethylstilbestrol

RR Newbold, BT Pentecost, S Yamashita, K Lum, JV Miller, P Nelson, J Blair, H Kong, C Teng and JA McLachlan
Developmental Endocrinology and Pharmacology Section, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709.

Previous studies from our laboratory on the feminization of the male mouse reproductive tract after prenatal exposure to diethylstilbestrol (DES) showed that the mRNA for the major estrogen-inducible uterine secretory protein, lactoferrin (LF), was constitutively expressed in the seminal vesicle of male mice exposed prenatally to DES, but not in the seminal vesicle of control mice. After castration, treatment with 17 beta-estradiol (20 micrograms/kg.day) for 3 days induced the LF mRNA in the seminal vesicle of both control and prenatally DES-exposed mice; however, the levels in DES-treated tissues were approximately 6-fold higher than those in control tissue. This report describes the presence of LF in seminal vesicle tissues and secretions of prenatally DES- exposed mice, as determined by immunohistochemistry and Western blot analysis. Further, these data are correlated with immunolocalization of the estrogen receptor in the seminal vesicle tissue. We conclude that the seminal vesicle of prenatally DES-exposed male mice has acquired two key characteristics of female tissues, namely LF production/regulation and estrogen receptor localization/distribution similar to that in uterine tissues.

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