IL-8-induced neutrophil chemotaxis is mediated by Janus kinase 3 (JAK3).
IL-8-induced neutrophil chemotaxis is mediated by Janus kinase 3 (JAK3).
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DOI:
10.1016/j.febslet.2010.11.031
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发表时间:
2011-01-03
期刊:
影响因子:
3.5
通讯作者:
Gomez-Cambronero J
中科院分区:
文献类型:
--
作者:
Henkels KM;Frondorf K;Gonzalez-Mejia ME;Doseff AL;Gomez-Cambronero J
Janus kinase 3 (JAK3) is a non-receptor tyrosine kinase vital to the regulation of T-cells. We report that JAK3 is a mediator of IL-8 stimulation of a different class of hematopoietic relevant cells: human neutrophils. IL-8 induced a time- and concentration-dependent activation of JAK3 activity in neutrophils and differentiated HL-60 leukemic cells. JAK3 was more robustly activated by IL-8 than other kinases: p70S6K, mTOR, MAPK or PKC. JAK3 silencing severely inhibited IL-8-mediated chemotaxis. Thus, IL-8 stimulates chemotaxis through a mechanism mediated by JAK3. Further, JAK3 activity and chemotaxis were inhibited by the flavonoid apigenin (4,5,7-trihydroxyflavone) at ~5 nM IC50. These new findings lay the basis for understanding the molecular mechanism of cell migration as it relates to neutrophil-mediated chronic inflammatory processes.
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