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首页> 外文期刊>Biological chemistry >A role of poly (ADP-ribose) polymerase in NF-kappaB transcriptional activation.
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A role of poly (ADP-ribose) polymerase in NF-kappaB transcriptional activation.

机译:聚(ADP-核糖)聚合酶在NF-κB转录激活中的作用。

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摘要

The transcription factor NF-kappaB plays a critical role in immune and inflammatory responses. Here we show that poly (ADP ribose) polymerase (PARP) is required for specific NF-kappaB transcriptional activation in vivo. The activation of the HIV-LTR promoter and an NF-kappaB-dependent artificial promoter was drastically reduced in PARP (-/-) cells, independently of the signaling pathway through which NF-kappaB was induced. Furthermore NF-kappaB-dependent gene activation was restored in vivo by the expression of PARP in PARP (-/-) cells. Finally, we show that both NF-kappaB and PARP formed a stable immunoprecipitable nuclear complex. This interaction did not need DNA binding. Our results suggest that PARP is an important cofactor in the activation cascade of NF-kappaB-dependent target genes.
机译:转录因子NF-κB在免疫和炎症反应中起关键作用。在这里,我们显示聚(ADP核糖)聚合酶(PARP)是体内特定的NF-κB转录激活所必需的。 HIV-LTR启动子和依赖NF-kappaB的人工启动子的激活在PARP(-/-)细胞中大大降低,与诱导NF-kappaB的信号传导途径无关。此外,通过在PARP(-/-)细胞中表达PARP,体内恢复了NF-κB依赖性基因激活。最后,我们表明NF-κB和PARP都形成了稳定的免疫沉淀核复合物。这种相互作用不需要DNA结合。我们的结果表明,PARP是依赖于NF-κB的靶基因的激活级联反应中的重要辅助因子。

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