ヤノ　ヒロミ   Yano Hiromi   矢野　博己    所属   川崎医療福祉大学  医療技術学部 健康体育学科    職種   教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Exhaustive exercise reduces tumor necrosis factor-alpha production in response to lipopolysaccharide in mice
掲載誌名	正式名：Neuroimmunomodulation
巻・号・頁	17(4),pp.279-286
著者・共著者	Yohei Tanaka, Noriaki Kawanishi, Daisuke Shiva, Noritsugu Tsutsumi, Masataka Uchida, Hiromi Kitamura, Yasuko Kato, Hiromi Yano
担当区分	最終著者,責任著者
発行年月	2010/05
概要	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.