resumo
BACKGROUND Physical exercise is a well-established strategy to control blood pressure. Nonetheless, its effects on protein homeostasis in individuals with hypertension are not clearly defined. AIMS Evaluate proteostasis, quality of life, and inflammation, oxidative stress, and vasoactive biomarkers in adults with hypertension regarding reported exercise habits. METHODS Twenty individuals were recruited in a health-care centre, 10 regular exercisers (age: 68.3 4.2 years) and 10 age-matched individuals without regular exercise participation (age: 67.7 5.1 years). Proteostasis and the levels of ubiquitin, heat shock protein 70 (Hsp70), endothelial nitric oxide synthase (eNOS), matrix metalloproteinases 2 (MMP-2), tissue inhibitor of MMP-2 (TIMP-2), connexin 43 (Cx43) and extracellular superoxide dismutase-3 (SOD-3) were assessed in plasma using immunoblotting techniques (western blot or slot blot) and Fourier-transform infrared spectroscopy (FTIR). Quality of life was assessed using the Short Form 36 (SF-36) version 2.0 questionnaire. RESULTS Significant higher levels of interleukin (IL)-6 (P = 0.014), eNOS (P = 0.011), Cx43 (P = 0.020), TIMP-2 (P = 0.038), and SOD-3 (P = 0.001), with a fold increase of 1.5, 1.2, 2.1, 1.3, and 1.2, respectively, were found in the exercise group. The overall quality of life (60.1 +/- 4.3 vs. 53.2 +/- 5.9, P = 0.009), as well as mental health domain (59.4 +/- 7.9 vs. 50.7 +/- 7.2, P = 0.024) were significantly higher in the exercise group. Multivariate analysis by FTIR showed that the age-matched group is characterized by peaks related with antiparallel beta-sheet, whereas exercise group is characterized by peaks related to random coils, beta-sheet, and alpha-helix. CONCLUSIONS Individuals with regular exercise participation showed better proteostasis, quality of life, inflammatory profile, antioxidant defenses, and eNOS levels.
palavras-chave
HEART; DISEASE
categoria
Cardiovascular System & Cardiology
autores
Teixeira, M; Gouveia, M; Duarte, A; Ferreira, M; Simoes, MI; Conceicao, M; Silva, G; Magalhaes, S; Ferreira, R; Nunes, A; Vieira, SI; Ribeiro, F
nossos autores
Sandra Vicência Martins Magalhães
Estudante de doutoramentoagradecimentos
This work was supported by the Portuguese Foundation for Science and Technology, Centro2020/Portugal2020 and FEDER/Compete2020 funds via the Institute for Biomedicine iBiMED (UID/BIM/04501/2019, SFRH/BD/128893/2017, SFRH/BD/131820/2017) and the pAGE program (Centro-01-0145-FEDER-000003).