alexa Aerobic training reverses airway inflammation and remodelling in an asthma murine model.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

Journal of Novel Physiotherapies

Author(s): Silva RA, Vieira RP, Duarte AC, Lopes FD, Perini A,

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Abstract Aerobic training (AT) decreases dyspnoea and exercise-induced bronchospasm, and improves aerobic capacity and quality of life; however, the mechanisms for such benefits remain poorly understood. The aim of the present study was to evaluate the AT effects in a chronic model of allergic lung inflammation in mice after the establishment of airway inflammation and remodelling. Mice were divided into the control group, AT group, ovalbumin (OVA) group or OVA+AT group and exposed to saline or OVA. AT was started on day 28 for 60 min five times per week for 4 weeks. Respiratory mechanics, specific immunoglobulin (Ig)E and IgG(1), collagen and elastic fibres deposition, smooth muscle thickness, epithelial mucus, and peribronchial density of eosinophils, CD3+ and CD4+, IL-4, IL-5, IL-13, interferon-gamma, IL-2, IL-1ra, IL-10, nuclear factor (NF)-kappaB and Foxp3 were evaluated. The OVA group showed an increase in IgE and IgG(1), eosinophils, CD3+, CD4+, IL-4, IL-5, IL-13, NF-kappaB, collagen and elastic, mucus synthesis, smooth muscle thickness and lung tissue resistance and elastance. The OVA+AT group demonstrated an increase of IgE and IgG(1), and reduction of eosinophils, CD3+, CD4+, IL-4, IL-5, IL-13, NF-kappaB, airway remodelling, mucus synthesis, smooth muscle thickness and tissue resistance and elastance compared with the OVA group (p<0.05). The OVA+AT group also showed an increase in IL-10 and IL-1ra (p<0.05), independently of Foxp3. AT reversed airway inflammation and remodelling and T-helper cell 2 response, and improved respiratory mechanics. These results seem to occur due to an increase in the expression of IL-10 and IL-1ra and a decrease of NF-kappaB. This article was published in Eur Respir J and referenced in Journal of Novel Physiotherapies

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