Yano Hiromi
Department Kawasaki University of Medical Welfare , Position Professor |
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Article types | 原著 |
Language | English |
Peer review | Peer reviewed |
Title | Exhaustive exercise reduces tumor necrosis factor-alpha production in response to lipopolysaccharide in mice |
Journal | Formal name:Neuroimmunomodulation |
Volume, Issue, Page | 17(4),pp.279-286 |
Author and coauthor | Yohei Tanaka, Noriaki Kawanishi, Daisuke Shiva, Noritsugu Tsutsumi, Masataka Uchida, Hiromi Kitamura, Yasuko Kato, Hiromi Yano |
Authorship | Last author,Corresponding author |
Publication date | 2010/05 |
Summary | OBJECTIVE: Stressful exercise reduces the plasma pro-inflammatory cytokine concentration in response to lipopolysaccharide (LPS). The aim of this study was to clarify the mechanism of exhaustive exercise-induced suppression of the plasma tumor necrosis factor (TNF)-alpha concentration in response to LPS.
METHODS: Male C3H/HeN mice (n = 66) were randomized to treadmill running to exhaustion (Ex) or a sedentary (Non-Ex) condition. Monocytes and splenic macrophages were collected from some animals, and other animals were injected with LPS (1 mg/kg) immediately after the exercise. The liver, lung and spleen tissues in the mice were removed 30 min after the LPS injection for determination of TNF-alpha mRNA expression. Blood and tissue samples were collected for determination of TNF-alpha and TNF receptors (TNFR) 1 h after the LPS injection. RESULTS: Although there was a significant suppression in LPS-induced plasma TNF-alpha in the Ex mice when compared to the Non-Ex mice (p < 0.01), soluble TNFR in plasma was not affected by the exercise. There was no change in cell-surface expression of Toll-like receptor 4 (TLR4) and in LPS-induced TNF-alpha mRNA expression and TNFR content in tissues between the Ex and Non-Ex groups. Interestingly, TNF-alpha contents in the liver, lung and spleen of the Ex mice were significantly lower than those of the Non-Ex group (p < 0.01, p < 0.01 and p < 0.05, respectively). CONCLUSION: These data suggest that exhaustive exercise-induced suppression of the plasma TNF-alpha concentration despite LPS stimulation might depend on translation of TNF-alpha in tissues. |