Regulation of NF-κB signaling by the A20 deubiquitinase.

Regulation of NF-κB signaling by the A20 deubiquitinase.
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DOI:
10.1038/cmi.2011.59
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发表时间:
2012-03
影响因子:
24.1
通讯作者:
--
中科院分区:
医学1区
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--
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NF-κB转录因子是炎症和先天免疫信号通路的中心介质。NF-κB的激活是通过关键信号分子的k63连锁多泛素化实现的,这些信号分子募集激酶复合物,进而激活i -κB激酶(IKK)。泛素化是一个高度动态的过程,由去泛素酶平衡,去泛素酶可切割多泛素链并终止下游信号事件。A20去泛素酶是NF-κB和炎症的关键负调节因子,因为A20缺陷小鼠会发生不受控制的自发多器官炎症。此外,A20基因组位点的特异性多态性使人类易患自身免疫性疾病。最近的研究也表明A20是b细胞淋巴瘤中一种重要的抑瘤因子,在b细胞淋巴瘤中失活。因此,靶向A20可能成为自身免疫性疾病和淋巴瘤新疗法的基础。
The NF-κB transcription factor is a central mediator of inflammatory and innate immune signaling pathways. Activation of NF-κB is achieved by K63-linked polyubiquitination of key signaling molecules which recruit kinase complexes that in turn activate the IκB kinase (IKK). Ubiquitination is a highly dynamic process and is balanced by deubiquitinases that cleave polyubiquitin chains and terminate downstream signaling events. The A20 deubiquitinase is a critical negative regulator of NF-κB and inflammation, since A20-deficient mice develop uncontrolled and spontaneous multi-organ inflammation. Furthermore, specific polymorphisms in the A20 genomic locus predispose humans to autoimmune disease. Recent studies also indicate that A20 is an important tumor suppressor that is inactivated in B-cell lymphomas. Therefore, targeting A20 may form the basis of novel therapies for autoimmune disease and lymphomas.
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