首页> 外文期刊>American Journal of Physiology >Focal adhesion kinase modulates activation of NF-kappaB by flow in endothelial cells.
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Focal adhesion kinase modulates activation of NF-kappaB by flow in endothelial cells.

机译:黏着斑激酶通过在内皮细胞中的流动来调节NF-κB的活化。

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摘要

Atherogenesis involves activation of NF-kappaB in endothelial cells by fluid shear stress. Because this pathway involves integrins, we investigated the involvement of focal adhesion kinase (FAK). We found that FAK was not required for flow-stimulated translocation of the p65 NF-kappaB subunit to the nucleus but was essential for phosphorylation of p65 on serine 536 and induction of ICAM-1, an NF-kappaB-dependent gene. NF-kappaB activation by TNF-alpha or hydrogen peroxide was FAK independent. Events upstream of NF-kappaB, including integrin activation, Rac activation, reactive oxygen production, and degradation of IkappaB, were FAK independent. FAK therefore regulates NF-kappaB phosphorylation and transcriptional activity in response to flow by a novel mechanism.
机译:动脉粥样硬化涉及通过流体剪切应力激活内皮细胞中的NF-κB。由于此途径涉及整合素,因此我们研究了粘着斑激酶(FAK)的参与。我们发现,FAK并不是p65 NF-kappaB亚基流刺激转运到细胞核所必需的,但对于丝氨酸536上p65的磷酸化和ICA--1(一种依赖NF-kappaB的基因)的诱导是必不可少的。 TNF-α或过氧化氢对NF-κB的激活与FAK无关。 NF-κB上游的事件(包括整联蛋白激活,Rac激活,活性氧生成和IkappaB降解)与FAK无关。因此,FAK通过一种新颖的机制响应血流而调节NF-κB的磷酸化和转录活性。

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