National Changhua University of Education Institutional Repository : Item 987654321/17856

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NCUEIR > College of Social Science and Physical Education > sh > Periodical Articles > Item 987654321/17856

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/17856

Title:	FAK Activation Is Required for TNF-a-Induced IL-6 Production in Myoblasts
Authors:	Tseng, Wen-Pei;Su, Chen-Ming;Tang, Chih-Hsin
Contributors:	運動健康所
Date:	2010-05
Issue Date:	2014-01-15T04:02:52Z
Publisher:	Wiley-Liss, Hoboken, NJ, ETATS-UNIS
Abstract:	Tumor necrosis factor-alpha (TNF-alpha) is a pleiotropic cytokine produced by activated macrophages. IL-6 is a multifunctional cytokine that plays a central role in both innate and acquired immune responses. We investigated the signaling pathway involved in IL-6 production stimulated by TNF-alpha in cultured myoblasts. TNF-alpha caused concentration-dependent increases in IL-6 production. TNF-alpha-mediated IL-6 production was attenuated by focal adhesion kinase (FAK) mutant and siRNA. Pretreatment with phosphatidylinositol 3-kinase inhibitor (PI3K; Ly294002 and wortmannin), Akt inhibitor, NF-kappaB inhibitor (pyrrolidine dithiocarbamate, PDTC), and IkappaB protease inhibitor (L-1-tosylamido-2-phenyl phenylethyl chloromethyl ketone, TPCK) also inhibited the potentiating action of TNF-alpha. TNF-alpha increased the FAK, PI3K, and Akt phosphorylation. Stimulation of myoblasts with TNF-alpha activated IkappaB kinase alpha/beta (IKKalpha/beta), IkappaBalpha phosphorylation, p65 phosphorylation, and kappaB-luciferase activity. TNF-alpha mediated an increase of kappaB-luciferase activity which was inhibited by Ly294002, wortmannin, Akt inhibitor, PDTC and TPCK or FAK, PI3K, and Akt mutant. Our results suggest that TNF-alpha increased IL-6 production in myoblasts via the FAK/PI3K/Akt and NF-kappaB signaling pathway.
Relation:	Journal of Cellular Physiology, 223(2): 389-396
Appears in Collections:	[sh] Periodical Articles

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