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Aerobic Exercise Protects from Pseudomonas aeruginosa-Induced Pneumonia in Elderly Mice.

Abstract：

BACKGROUND:Pseudomonas aeruginosa (PS) infection results in severe morbidity and mortality, especially in immune-deficient populations. Aerobic exercise (AE) modulates the immune system, but its effects on the outcomes of pulmonary PS infection in elderly mice are unknown. METHODS:BALB/c mice (24 weeks old) were randomized to sedentary, exercise (EX), PS, and PS + EX groups for the acute experimental setting, and PS and PS + EX groups for the chronic setting. Low-intensity AE was performed for 5 weeks, 60 min/day; 24 h after the final AE session, mice were inoculated with 5 × 104 colony-forming units (CFU) of PS, and 24 h and 14 days after PS inoculation, mice were studied. RESULTS:AE inhibited PS colonization (p < 0.001) and lung inflammation (total cells, neutrophils, lymphocytes [p < 0.01] in bronchoalveolar lavage [BAL]), with significant differences in BAL levels of IL-1β (p < 0.001), IL-6 (p < 0.01), CXCL1 (p < 0.001), and TNF-α (p < 0.001), as well as parenchymal neutrophils (p < 0.001). AE increased BAL levels of IL-10 and parenchymal (p < 0.001) and epithelial (p < 0.001) IL-10 expression, while epithelial (p < 0.001) and parenchymal (p < 0.001) NF-κB expression was decreased. AE diminished pulmonary lipid peroxidation (p < 0.001) and increased glutathione peroxidase (p < 0.01). Pre-incubation of BEAS-2B with IL-10 inhibited PS-induced epithelial cell expression of TNF-α (p < 0.05), CD40 (p < 0.01), and dichlorodihydrofluorescein diacetate (p < 0.05). CONCLUSIONS:AE inhibits PS-induced lung inflammation and bacterial colonization in elderly mice, involving IL-10/NF-κB, and redox signaling.

journal_name

J Innate Immun

journal_title

Journal of innate immunity

authors

Stravinskas Durigon T,MacKenzie B,Carneiro Oliveira-Junior M,Santos-Dias A,De Angelis K,Malfitano C,Kelly da Palma R,Moreno Guerra J,Damaceno-Rodrigues NR,Garcia Caldini E,de Almeida FM,Aquino-Santos HC,Rigonato-Oliveira NC,Lea

doi

10.1159/000488953

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

279-290

issue

4

eissn

1662-811X

issn

1662-8128

pii

000488953

journal_volume

10

pub_type

杂志文章

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