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Effects of regular aerobic exercise in mice exposed to cigarette smoke: temporal profile of the inflammatory response and oxidative stress

Grant number: 12/09932-0
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2012
Effective date (End): July 31, 2014
Field of knowledge:Health Sciences - Physiotherapy and Occupational Therapy
Principal researcher:Milton de Arruda Martins
Grantee:Alessandra Choqueta de Toledo
Home Institution: Faculdade de Medicina (FM). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:09/53904-9 - Effects of environment and lifestyle on asthma and chronic obstructive pulmonary disease: studies with experimental animals and people with asthma, AP.TEM

Abstract

Smoking is the major risk factor for the development of chronic obstructive pulmonary disease (COPD), which is associated with high morbidity and mortality and use of health resources. In recent years studies have shown that regular aerobic training in smokers reduce the decline in lung function and the risk of developing COPD throughout the years. Recent experimental study developed by our group showed that the mechanisms related to the protection of physical exercise in the development of emphysema involve anti-inflammatory mediators and antioxidants. However, the intracellular mediators of these exercise effects on the development of pulmonary emphysema have not been investigated. Thus, the present study aims to evaluate the temporal effects of Nfr2-Keap1 proteins signaling on the lungs and peripheral skeletal muscle as possible modulators of the anti-inflammatory and antioxidants effects of aerobic training in an experimental model of pulmonary emphysema. The smoke group will be exposed to cigarette smoke for 30 minutes / day and the animals from exercise group will undergo physical training of moderate intensity 60 minutes/day. Both protocols will be carried out: 5 days/week for 4, 8 and 12 weeks. The parameters evaluated are: lung mechanics, number of total and differentials cells in bronchoalveolar lavage fluid, alveolar diameter, remodeling of the airways and lung parenchyma, determining levels of TNF-a, IL-1beta, IL-6, IL-10 and IL-1ra; levels of superoxide anion and hydrogen peroxide (oxidizing) and the levels of antioxidant enzymes (superoxide dismutase, glutathione peroxidase and catalase) in lung and muscle tissue. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
TOLEDO-ARRUDA, ALESSANDRA C.; VIEIRA, RODOLFO P.; GUARNIER, FLAVIA A.; SUEHIRO, CAMILA L.; CALEMAN-NETO, AGOSTINHO; OLIVO, CLARICE R.; ARANTES, PETRA M. M.; ALMEIDA, FRANCINE M.; LOPES, FERNANDA D. T. Q. S.; RAMOS, ERCY M. C.; CECCHINI, RUBENS; LIN, CHIN JIA; MARTINS, MILTON ARRUDA. Time-course effects of aerobic physical training in the prevention of cigarette smoke-induced COPD. Journal of Applied Physiology, v. 123, n. 3, p. 674-683, SEP 2017. Web of Science Citations: 7.
RAMOS, ERCY M. C.; VANDERLEI, LUIZ CARLOS M.; ITO, JULIANA T.; LIMA, FABIANO F.; RODRIGUES, FERNANDA M. M.; MANZANO, BEATRIZ M.; FERNANDES, ROMULO A.; CECILIO, MICHEL J.; TOLEDO-ARRUDA, ALESSANDRA C.; RAMOS, DIONEI. Acute Mucociliary Clearance Response to Aerobic Exercise in Smokers. Respiratory Care, v. 60, n. 11, p. 1575-1584, NOV 2015. Web of Science Citations: 2.

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