期刊
JOURNAL OF CELLULAR BIOCHEMISTRY
卷 111, 期 2, 页码 469-475出版社
WILEY
DOI: 10.1002/jcb.22729
关键词
MESENCHYMAL STEM CELLS; HEPATOCYTE GROWTH FACTOR; TNF-alpha; CELL MIGRATION; ANTI-INFLAMMATORY CYTOKINE
资金
- National Natural Science Foundation of China [30600586]
- National Basic Research Program of China (973 Program) [2009CB522403]
Accumulating evidence suggests that mesenchymal stem cells (MSCs) may decrease destructive inflammation and reduce tissue loss. Tumor necrosis factor-alpha (TNF-alpha) plays a central role in induction of proinflammatory signaling and paradoxically activates intracellular anti-inflammatory survival pathways. In this study, we investigated whether TNF-alpha could induce a chemotactic effect on human MSCs and stimulate their production of anti-inflammatory factors in vitro, as well as determined mechanisms that mediated this effect. Migration assays demonstrated that TNF-alpha had a chemotactic effect on MSCs. TNF-alpha increased both hepatocyte growth factor (HGF) mRNA expression in MSCs and HGF secretion in conditioned medium. These effects were dependent on the p38 MAPK and PI3K/Akt, but not JNK and ERK signaling pathways. Furthermore, these effects were inhibited by a specific neutralizing antibody to TNF receptor II, but not TNF receptor I. We conclude that TNF-alpha can enhance human MSCs migration and stimulate their production of HGF. These effects are mediated via a specific TNF receptor and signaling pathways. J. Cell. Biochem. 111: 469-475, 2010. (C) 2010 Wiley-Liss, Inc.
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