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
Gomez-Cambronero J
中科院分区:
生物学3区
文献类型:
--
作者:
Henkels KM;Frondorf K;Gonzalez-Mejia ME;Doseff AL;Gomez-Cambronero J

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Janus激酶3(JAK 3)是一种对T细胞调节至关重要的非受体酪氨酸激酶。我们报告说,JAK 3是IL-8刺激不同类别的造血相关细胞:人中性粒细胞的介质。IL-8诱导中性粒细胞和分化的HL-60白血病细胞中JAK 3活性的时间和浓度依赖性激活。JAK 3被IL-8比其他激酶:p70 S6 K、mTOR、MAPK或PKC更稳健地激活。JAK 3沉默严重抑制IL-8介导的趋化性。因此,IL-8通过JAK 3介导的机制刺激趋化性。此外,JAK 3活性和趋化性被类黄酮芹菜素(4,5,7-三羟基黄酮)以约5 nM IC 50抑制。这些新发现为理解细胞迁移的分子机制奠定了基础,因为它与嗜中性粒细胞介导的慢性炎症过程有关。
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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