Document Detail


Increased Testicular Sertoli Cell Population Induced by an Estrogen Receptor Antagonist.
MedLine Citation:
PMID:  23178163     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Sertoli cell proliferation is prolonged in neonatal boars treated with the aromatase inhibitor letrozole, but porcine testicular aromatase synthesizes a potent, non-aromatizable androgen,1-hydroxytestosterone, as well as estradiol. Therefore, experiments were conducted to determine whether the Sertoli cell proliferative response to letrozole is due to a loss of estrogen or a loss of androgen signaling. Littermate boars were treated with letrozole, the estrogen receptor blocker ICI 182,780, or vehicle, from 1 week of age and testes collected at 6.5 weeks. Sertoli cell number was increased 30% by letrozole or ICI 182,780 compared with vehicle. Neither treatment affected testosterone, gonadotropins or prolactin. We conclude that Sertoli cell proliferation in neonatal boars is restricted by the local activation of estrogen receptors. The response to letrozole is apparently not mediated by the novel capacity of the porcine gonadal aromatase for 1-hydroxytestosterone but by estradiol synthesis; therefore, aromatase inhibition may have similar effects on Sertoli cell proliferation in other species.
Authors:
Trish Berger; Alan Conley; Monica Van Klompenberg; Janet F Roser; Russell C Hovey
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-21
Journal Detail:
Title:  Molecular and cellular endocrinology     Volume:  -     ISSN:  1872-8057     ISO Abbreviation:  Mol. Cell. Endocrinol.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7500844     Medline TA:  Mol Cell Endocrinol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Ireland Ltd.
Affiliation:
Departments of Animal Science, University of California, Davis, CA 95616, U.S.A. Electronic address: tberger@ucdavis.edu.
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