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Moderate swimming exercise and caffeine supplementation reduce the levels of inflammatory cytokines without causing oxidative stress in tissues of middle-aged rats

Posted May 1, 2014
This news or article is intended for readers with certain scientific or professional knowledge in the field.

The levels of circulatory inflammatory markers, including interleukin (IL) IL-1β, IL-6, tumor necrosis factor-α (TNF-α) and interferon (INF-γ), are known to increase associated to aging. Caffeine has been reported to produce many beneficial effects for health. Exercise is considered to be a safe medicine to attenuate inflammation and cellular senescence.

The purpose of the present study was to investigate the effects of a moderate-intensity swimming exercise (3 % of body weight, 20 min per day, 4 weeks) and sub-chronic supplementation with caffeine (30 mg/kg, 4 weeks) on the serum cytokine levels in middle-aged (18 months) Wistar rats. The effects of swimming exercise and caffeine on oxidative stress in muscle and liver of middle-aged rats were also investigated.

The two-way ANOVA of pro-inflammatory cytokine levels demonstrated a significant exercise x caffeine interaction for IL-1β (F (1, 16) = 9.5772; p = 0.0069), IL-6 (F (1, 16) = 8.0463; p = 0.0119) and INF-γ (F (1, 16) = 15.078; p = 0.0013). The two-way ANOVA of TNF-α levels revealed a significant exercise × caffeine interaction (F (1, 16) = 9.6881; p = 0.00670). Swimming exercise and caffeine supplementation increased the ratio of reduced glutathione/oxidized glutathione in the rat liver and gastrocnemius muscle. Hepatic and renal markers of damage were not modified. In conclusion, a moderate-intensity swimming exercise protocol and caffeine supplementation induced positive adaptations in modulating cytokine levels without causing oxidative stress in muscle and liver of middle-aged rats.

Source: PubMed

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