Physical training improves exercise tolerance, cardiac function and promotes changes in neurotrophins levels in chagasic mice.

Autor: Alves RL; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Cardoso BRL; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Ramos IPR; Federal University of Rio de Janeiro, Center of Health Science, Av. Carlos Chagas Filho, 373 Rio de Janeiro, Brazil., Oliveira BDS; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Dos Santos ML; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., de Miranda AS; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., de Almeida TCS; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Vieira MAR; Federal University of Minas Gerais, Department of Physiology and Biophysics, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Machado FS; Federal University of Minas Gerais, Department of Biochemistry and Immunology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil., Ferreira AJ; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil. Electronic address: anderson@icb.ufmg.br., de Avelar GF; Federal University of Minas Gerais, Department of Morphology, Av. Pres. Antônio Carlos, 6627 Campus Pampulha, Belo Horizonte, Brazil.
Jazyk: angličtina
Zdroj: Life sciences [Life Sci] 2019 Sep 01; Vol. 232, pp. 116629. Date of Electronic Publication: 2019 Jul 03.
DOI: 10.1016/j.lfs.2019.116629
Abstrakt: Aims: To investigate the effects of moderate aerobic physical training on cardiac function and morphology as well as on the levels of glial cell-derived neurotrophic factor (GDNF), nerve growth factor (NGF) and brain derived neurotrophic factor (BDNF) of animals infected with the Y strain of Trypanosoma cruzi.
Main Methods: Twenty-eight male C57BL/6 mice were distributed into 4 groups: sedentary control (SC), trained control (TC), sedentary infected (CHC) and trained infected (CHT). The infection was performed by intraperitoneal injection of trypomastigote forms and the animals were adapted to treadmill in the week before the beginning of the training protocol, initiated 45 days post infection. Maximal exercise test (TEM) was performed at the baseline as well as at the end of the 4th, 8th and 12th weeks of training. At the end of the 12th week, all animals were evaluated for cardiac morphology and function by echocardiography.
Key Findings: CHC group showed a larger area of right ventricle (RVA), increased end-systolic volume and reduction in ejection fraction (EF), stroke volume (SV), cardiac output (CO) and fractional area change (FAC). The training reduced the RVA and improved the FAC of chagasic animals. GDNF level was higher in TC and CHC groups compared to SC in heart and BDNF levels were higher in CHC compared to SC in heart and serum.
Significance: Physical training ameliorated the cardiac function of infected animals and promoted adjusts in BDNF and GDNF levels. These findings evidenced these neurotrophins as possible biomarkers of cardiac function responsive to exercise stimulus.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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