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High-Intensity Exercise Prevents Disturbances in Lung Inflammatory Cytokines and Antioxidant Defenses Induced by Lipopolysaccharide.
Inflammation 2018 December
In this study, we evaluated the effects of high-intensity swimming in an experimental model of acute lung injury (ALI) induced by lipopolysaccharide (LPS) on lung inflammation and antioxidant defenses. Balb/C male mice were submitted to exercise (30 min/day, 5 days/week, for a period of 3 weeks) prior to LPS instillation in the lung. Twenty-four hours after delivery of LPS (10 μg/animal), mice were euthanized and bronchoalveolar fluid (BALF) was obtained for cell counting and analysis of cytokines by ELISA. Lung tissue was used to evaluate antioxidant defenses. LPS instillation resulted in an increase in total and mononuclear cells, IL-1β, TNF-α, and IL-6 in BALF. LPS instillation also altered IL-10 and IL-ra levels in BALF and induced antioxidant defenses (glutathione, superoxide dismutase, catalase, and glutathione peroxidase) in the lung. Protein carbonyl increased in the LPS-treated animals. High-intensity swimming prevented all these changes induced by LPS. Significance: Therefore, this experimental protocol of high-intensity swimming showed a protective effect on ALI, decreasing inflammatory processes and preventing disturbances in antioxidant defenses into the lungs.
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