Please use this identifier to cite or link to this item: https://repositorio.unifesp.br/handle/11600/37781
Title: Effects of Exercise Training on Circulating and Skeletal Muscle Renin-Angiotensin System in Chronic Heart Failure Rats
Authors: Gomes-Santos, Igor Lucas
Fernandes, Tiago
Couto, Gisele Kruger
Ayres Ferreira-Filho, Julio Cesar
Cury Salemi, Vera Maria
Fernandes, Fernanda Barrinha [UNIFESP]
Casarini, Dulce Elena [UNIFESP]
Brum, Patricia Chakur
Rossoni, Luciana Venturini
Oliveira, Edilamar Menezes de
Negrao, Carlos Eduardo
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Issue Date: 23-May-2014
Publisher: Public Library Science
Citation: Plos One. San Francisco: Public Library Science, v. 9, n. 5, 11 p., 2014.
Abstract: Background: Accumulated evidence shows that the ACE-AngII-AT1 axis of the renin-angiotensin system (RAS) is markedly activated in chronic heart failure (CHF). Recent studies provide information that Angiotensin (Ang)-(1-7), a metabolite of AngII, counteracts the effects of AngII. However, this balance between AngII and Ang-(1-7) is still little understood in CHF. We investigated the effects of exercise training on circulating and skeletal muscle RAS in the ischemic model of CHF.Methods/Main Results: Male Wistar rats underwent left coronary artery ligation or a Sham operation. They were divided into four groups: 1) Sedentary Sham (Sham-S), 2) exercise-trained Sham (Sham-Ex), sedentary CHF (CHF-S), and exercise-trained CHF (CHF-Ex). Angiotensin concentrations and ACE and ACE2 activity in the circulation and skeletal muscle (soleus and plantaris) were quantified. Skeletal muscle ACE and ACE2 protein expression, and AT1, AT2, and Mas receptor gene expression were also evaluated. CHF reduced ACE2 serum activity. Exercise training restored ACE2 and reduced ACE activity in CHF. Exercise training reduced plasma AngII concentration in both Sham and CHF rats and increased the Ang-(1-7)/AngII ratio in CHF rats. CHF and exercise training did not change skeletal muscle ACE and ACE2 activity and protein expression. CHF increased AngII levels in both soleus and plantaris muscle, and exercise training normalized them. Exercise training increased Ang-(1-7) in the plantaris muscle of CHF rats. the AT1 receptor was only increased in the soleus muscle of CHF rats, and exercise training normalized it. Exercise training increased the expression of the Mas receptor in the soleus muscle of both exercise-trained groups, and normalized it in plantaris muscle.Conclusions: Exercise training causes a shift in RAS towards the Ang-(1-7)-Mas axis in skeletal muscle, which can be influenced by skeletal muscle metabolic characteristics. the changes in RAS circulation do not necessarily reflect the changes occurring in the RAS of skeletal muscle.
URI: http://repositorio.unifesp.br/handle/11600/37781
ISSN: 1932-6203
Other Identifiers: http://dx.doi.org/10.1371/journal.pone.0098012
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