Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.

<h4>Background</h4>In clinical studies, myocardial remodeling in aortic valve stenosis appears to be more favorable in women than in men, even after menopause. In the present study, we assessed whether circulating androgens contribute to a less favorable myocardial remodeling under press...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Cecilia Montalvo, Ana V Villar, David Merino, Raquel García, Miguel Ares, Miguel Llano, Manuel Cobo, María A Hurlé, J Francisco Nistal
Formato: article
Lenguaje:EN
Publicado: Public Library of Science (PLoS) 2012
Materias:
R
Q
Acceso en línea:https://doaj.org/article/c0ae32a71e434f96838c3c000749c75f
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:c0ae32a71e434f96838c3c000749c75f
record_format dspace
spelling oai:doaj.org-article:c0ae32a71e434f96838c3c000749c75f2021-11-18T07:20:57ZAndrogens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.1932-620310.1371/journal.pone.0035635https://doaj.org/article/c0ae32a71e434f96838c3c000749c75f2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22558184/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>In clinical studies, myocardial remodeling in aortic valve stenosis appears to be more favorable in women than in men, even after menopause. In the present study, we assessed whether circulating androgens contribute to a less favorable myocardial remodeling under pressure overload in males. We examined sex-related differences in one-year-old male and female mice. Whereas male mice at this age exhibited circulating androgen levels within the normal range for young adults, the circulating estrogens in females were reduced. The contribution of gonadal androgens to cardiac remodeling was analyzed in a group of same-age castrated mice.<h4>Methodology/principal findings</h4>Animals were subjected to transverse aortic constriction (TAC). Echocardiography was performed 2 weeks after TAC and myocardial mRNA levels of TGF-βs, Smads 2 and 3, collagens, fibronectin, β-myosin heavy chain and α-myosin heavy chain were determined by q-PCR. Protein detection of p-SMAD2/3 was performed by Western Blot. Histological staining of fibrosis was performed with picrosirius red and Masson's trichrome. Compared with females, males developed more severe tissue fibrosis, LV dilation and hemodynamic dysfunction. TAC-males showed higher myocardial expression levels of TGF-βs and the treatment with a neutralizing antibody to TGF-β prevented myocardial fibrosis development. Orchiectomy diminished TAC-induced up-regulation of TGF-βs and TGF-β target genes, and it also reduced fibrosis and hemodynamic dysfunction. The capability of androgens to induce TGF-β expression was confirmed in NIH-3T3 fibroblasts and H9C2 cardiomyocytes exposed to dihydrotestosterone.<h4>Conclusions/significance</h4>Our results indicate that circulating androgens are responsible for the detrimental effects in the myocardium of older male mice subjected to pressure overload through a mechanism involving TGF-βs.Cecilia MontalvoAna V VillarDavid MerinoRaquel GarcíaMiguel AresMiguel LlanoManuel CoboMaría A HurléJ Francisco NistalPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 4, p e35635 (2012)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Cecilia Montalvo
Ana V Villar
David Merino
Raquel García
Miguel Ares
Miguel Llano
Manuel Cobo
María A Hurlé
J Francisco Nistal
Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
description <h4>Background</h4>In clinical studies, myocardial remodeling in aortic valve stenosis appears to be more favorable in women than in men, even after menopause. In the present study, we assessed whether circulating androgens contribute to a less favorable myocardial remodeling under pressure overload in males. We examined sex-related differences in one-year-old male and female mice. Whereas male mice at this age exhibited circulating androgen levels within the normal range for young adults, the circulating estrogens in females were reduced. The contribution of gonadal androgens to cardiac remodeling was analyzed in a group of same-age castrated mice.<h4>Methodology/principal findings</h4>Animals were subjected to transverse aortic constriction (TAC). Echocardiography was performed 2 weeks after TAC and myocardial mRNA levels of TGF-βs, Smads 2 and 3, collagens, fibronectin, β-myosin heavy chain and α-myosin heavy chain were determined by q-PCR. Protein detection of p-SMAD2/3 was performed by Western Blot. Histological staining of fibrosis was performed with picrosirius red and Masson's trichrome. Compared with females, males developed more severe tissue fibrosis, LV dilation and hemodynamic dysfunction. TAC-males showed higher myocardial expression levels of TGF-βs and the treatment with a neutralizing antibody to TGF-β prevented myocardial fibrosis development. Orchiectomy diminished TAC-induced up-regulation of TGF-βs and TGF-β target genes, and it also reduced fibrosis and hemodynamic dysfunction. The capability of androgens to induce TGF-β expression was confirmed in NIH-3T3 fibroblasts and H9C2 cardiomyocytes exposed to dihydrotestosterone.<h4>Conclusions/significance</h4>Our results indicate that circulating androgens are responsible for the detrimental effects in the myocardium of older male mice subjected to pressure overload through a mechanism involving TGF-βs.
format article
author Cecilia Montalvo
Ana V Villar
David Merino
Raquel García
Miguel Ares
Miguel Llano
Manuel Cobo
María A Hurlé
J Francisco Nistal
author_facet Cecilia Montalvo
Ana V Villar
David Merino
Raquel García
Miguel Ares
Miguel Llano
Manuel Cobo
María A Hurlé
J Francisco Nistal
author_sort Cecilia Montalvo
title Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
title_short Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
title_full Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
title_fullStr Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
title_full_unstemmed Androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving TGF-β.
title_sort androgens contribute to sex differences in myocardial remodeling under pressure overload by a mechanism involving tgf-β.
publisher Public Library of Science (PLoS)
publishDate 2012
url https://doaj.org/article/c0ae32a71e434f96838c3c000749c75f
work_keys_str_mv AT ceciliamontalvo androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT anavvillar androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT davidmerino androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT raquelgarcia androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT miguelares androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT miguelllano androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT manuelcobo androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT mariaahurle androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
AT jfrancisconistal androgenscontributetosexdifferencesinmyocardialremodelingunderpressureoverloadbyamechanisminvolvingtgfb
_version_ 1718423623125958656