ER stress improvement by aerobic training or enalapril differently ameliorates pathological cardiac remodeling in obese mice.

Autor: Salles ACP; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil.; Laboratory of Exercise Sciences, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil., Alexandre-Santos B; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil.; Laboratory of Exercise Sciences, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil., de Souza Carvalho T; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil., Proença AB; Laboratory of Exercise Sciences, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil., Sepúlveda-Fragoso V; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil., Fernandes T; Laboratory of Biochemistry and Molecular Biology of Exercise, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, SP, Brazil., Oliveira EM; Laboratory of Biochemistry and Molecular Biology of Exercise, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, SP, Brazil.; National Institute for Science & Technology - INCT (In)activity & Exercise, CNPq, Niteroi, RJ, Brazil., da Nóbrega ACL; Laboratory of Exercise Sciences, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil.; National Institute for Science & Technology - INCT (In)activity & Exercise, CNPq, Niteroi, RJ, Brazil., Frantz EDC; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil.; Laboratory of Exercise Sciences, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil.; National Institute for Science & Technology - INCT (In)activity & Exercise, CNPq, Niteroi, RJ, Brazil., Magliano DC; Research Center on Morphology and Metabolism, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil. dcmagliano@id.uff.br.; Department of Morphology, Biomedical Institute, Fluminense Federal University, Niteroi, RJ, Brazil. dcmagliano@id.uff.br.
Jazyk: angličtina
Zdroj: Molecular and cellular biochemistry [Mol Cell Biochem] 2024 Nov; Vol. 479 (11), pp. 3167-3179. Date of Electronic Publication: 2024 Feb 03.
DOI: 10.1007/s11010-024-04925-1
Abstrakt: Overactivation of the classic arm of the renin-angiotensin system (RAS) is one of the main mechanisms involved in obesity-related cardiac remodeling, and a possible relationship between RAS and ER stress in the cardiovascular system have been described. Thus, the aim of this study is to evaluate if activating the protective arm of the RAS by ACE inhibition or aerobic exercise training could overturn diet-induced pathological cardiac hypertrophy by attenuating ER stress. Male C57BL/6 mice were fed a control (SC) or a high-fat diet (HF) for 16 weeks. In the 8th week, HF-fed animals were randomly divided into HF, enalapril treatment (HF-En), and aerobic exercise training (HF-Ex) groups. Body mass (BM), food and energy intake, plasma analyzes, systolic blood pressure (SBP), physical conditioning, and plasma ACE and ACE2 activity were evaluated. Cardiac morphology, and protein expression of hypertrophy, cardiac metabolism, RAS, and ER stress markers were assessed. Data presented as mean ± standard deviation and analyzed by one-way ANOVA with Holm-Sidak post-hoc. HF group had increased BM and SBP, and developed pathological concentric cardiac hypertrophy, with overactivation of the classic arm of the RAS, and higher ER stress. Both interventions reverted the increase in BM, and SBP, and favored the protective arm of the RAS. Enalapril treatment improved pathological cardiac hypertrophy with partial reversal of the concentric pattern, and slightly attenuated cardiac ER stress. In contrast, aerobic exercise training induced physiological eccentric cardiac hypertrophy, and fully diminished ER stress.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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