| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Sch Med, Dept Phys Therapy, BR-01246903 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Sch Med, Dept Clin Med LIM 20, BR-01246903 Sao Paulo, SP - Brazil
[3] Univ City Sao Paulo UNICID, Sao Paulo, SP - Brazil
Número total de Afiliações: 3
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The purpose of this study was to determine the effect of aerobic exercise training (AT) on the expression of glucocorticoid receptors (GR) and anti-inflammatory cytokines in an asthma model. BALB/c mice were divided into groups control (CT; nonsensitized/nontrained), aerobic training (AT; nonsensitized/trained), ovalbumin (OVA; sensitized/not trained), and OVA+AT (sensitized/trained). OVA groups received OVA by inhalation, and the AT groups completed 1, 3, or 7 days of exercise (60min/session). Expression of GR, IL-4, IL-5, IL-10, IL-1ra, NF-B, TGF-, VEGF, ICAM-1, VCAM-1; eosinophils counting; and airway remodeling (AR) features {[}airway smooth muscle (ASM) and epithelial thickness and collagen fiber deposition] were quantified. OVA sensitization induced a decrease in the expression of GR and increases in the eosinophil, IL-4, IL-5, NF-B, TGF-, VEGF, ICAM-1, VCAM-1, and AR features (P<0.05). After 3 days, AT reversed the OVA-induced reduction in the expression of GR, and subsequently induced increases in the expression of IL-10 and IL-1ra (seventh day). In contrast, the eosinophil migration, the expression of NF-B, IL-4, IL-5, TGF-, RANTES, VEGF, ICAM-1, VCAM-1, and the AR features (P<0.05) were reduced. AT increases the expression of GR and anti-inflammatory cytokines (IL-10 and IL-1ra) and reduces the expression of inflammatory mediators and airway inflammation in an animal model of asthma. (AU) |