Cited by 49Estrogen and related hormone effectsEffects and risks of endocrine disrupting chemicalsHormonal and reproductive studies

Almost exclusive androgenic action of dehydroepiandrosterone in the rat mammary gland.

Sourla, Antigone, Martel, Céline, Labrie, Claude, Labrie, Fernand·1998·Endocrinology

Abstract

To determine the relative role of the androgenic and/or estrogenic components of the action of dehydroepiandrosterone (DHEA) on the histomorphology and structure of the rat mammary gland, ovariectomized (OVX) female animals received DHEA administered alone or in combination with the pure antiandrogen flutamide or the pure antiestrogen EM-800 for 12 months. We have also evaluated the effect of estradiol (E2) and dihydrotestosterone constantly released from SILASTIC brand silicon implants as well as medroxyprogesterone acetate released from poly(lactide-co-glycolide) microspheres. While 1-yr OVX resulted in a severe atrophy of the mammary gland, treatment of OVX animals with DHEA stimulated lobuloalveolar and ductal growth, as well as the secretory activity of the acinar cells, thus resulting in a lobuloalveolar type of development of the mammary gland. The addition of FLU to DHEA almost completely prevented the stimulatory effect observed with DHEA alone, whereas addition of the antiestrogen EM-800 had no significant effect on the action of DHEA on the mammary gland. At the doses used, medroxyprogesterone acetate and dihydrotestosterone also stimulated ductal and alveolar development, although to a lesser degree than that achieved with DHEA. The stimulatory effect of estradiol was mainly expressed on ductal growth with a smaller stimulatory effect on lobuloalveolar development. The above-indicated stimulatory effects on lobuloalveolar development were also reflected in significant increases of the total and parenchymal gland surface areas of the mammary gland. The present study shows that androgens induce a marked lobuloalveolar type of development of the mammary gland in the rat. Moreover, these data indicate the highly predominant or almost exclusive androgenic component in the potent stimulatory action of DHEA on the histomorphology and structure of the rat mammary gland. In fact, blockade of the potential estrogenic component of DHEA action by EM-800 did not affect the stimulatory action of DHEA on mammary gland histomorphology, whereas the antiandrogen FLU almost completely blocked the effect of DHEA.

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Crossref · 10.1210/endo.139.2.5762

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Authors
Sourla, A., Martel, C., Labrie, C., & Labrie, F.
Affiliations
Centre hospitalier de l'Université Laval (CA)
Corresponding author
Labrie, Fernand
Venue
Endocrinology
Published
1998-02
Volume
139
Issue
2
Pages
753-764
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2129320642
Cited by
49
References
71
Citations by year
2025: 1 · 2021: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 2 · 2012: 4
FWCI
1.33
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Effects and risks of endocrine disrupting chemicals
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
dehydroepiandrosterone, mammary gland development, estrogenic activity, flutamide, medroxyprogesterone acetate, dihydrotestosterone, estradiol, ovariectomy, lobuloalveolar development
MeSH terms
Androgen Antagonists, Androgens, Animals, Benzopyrans, Dehydroepiandrosterone, Estradiol, Estrogen Antagonists, Female, Flutamide, Mammary Glands, Animal, Medroxyprogesterone, Ovariectomy, Propionates, Dihydrotestosterone, Rats, Sprague-Dawley, Rats

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