HIF-1α restricts NF-κB-dependent gene expression to control innate immunity signals.

HIF-1α restricts NF-κB-dependent gene expression to control innate immunity signals.
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DOI:
10.1242/dmm.017285
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发表时间:
2015-02
影响因子:
4.3
通讯作者:
Rocha S
Rocha S
中科院分区:
医学2区
文献类型:
--
作者:
Bandarra D;Biddlestone J;Mudie S;Müller HA;Rocha S

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缺氧和炎症密切相关。核因子κB(NF-κB)对缺氧诱导因子(HIF)系统的调控作用已被人们所知,但对HIF如何调控NF-κB的研究却知之甚少。在这里,我们发现HIF-1α抑制NF-κ B依赖的基因表达。HIF-1α缺失导致哺乳动物细胞和模式生物果蝇中NF-κB转录活性增加。HIF-1α缺失增强NF-κB反应,这不仅需要TAK-IKK复合物,还需要CDK 6。HIF-1α的缺失导致哺乳动物癌细胞中血管生成反应的增加和感染后果蝇死亡率的增加。这些结果表明,HIF-1α需要抑制NF-κB反应,从而防止过度的和破坏性的促炎反应。
Hypoxia and inflammation are intimately linked. It is known that nuclear factor κB (NF-κB) regulates the hypoxia-inducible factor (HIF) system, but little is known about how HIF regulates NF-κB. Here, we show that HIF-1α represses NF-κB-dependent gene expression. HIF-1α depletion results in increased NF-κB transcriptional activity both in mammalian cells and in the model organism Drosophila melanogaster. HIF-1α depletion enhances the NF-κB response, and this required not only the TAK-IKK complex, but also CDK6. Loss of HIF-1α results in an increased angiogenic response in mammalian cancer cells and increased mortality in Drosophila following infection. These results indicate that HIF-1α is required to restrain the NF-κB response, and thus prevents excessive and damaging pro-inflammatory responses.
DOI: 10.1042/bsr20140095
发表时间: 2014-07-29
期刊: Bioscience reports
影响因子: 4
作者:
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