The Inflammatory Signal Adaptor RIPK3: Functions Beyond Necroptosis.

The Inflammatory Signal Adaptor RIPK3: Functions Beyond Necroptosis.
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DOI:
10.1016/bs.ircmb.2016.08.007
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发表时间:
2017
影响因子:
--
通讯作者:
Chan FK
Chan FK
中科院分区:
生物学3区
文献类型:
--
作者:
Moriwaki K;Chan FK

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受体相互作用蛋白激酶3(RIPK3)是坏死性下垂的一种重要的丝氨酸/苏氨酸激酶,是一种调节性坏死。多种刺激可以通过磷酸化引起RIPK3的激活。激活的RIPK3进而磷酸化并激活下游的坏死下垂执行者混合血统激酶域样蛋白(MLKL)。坏死性下垂是一种高度炎症性的细胞死亡类型,其原因是细胞内的免疫原物从破坏的质膜中释放出来。事实上,在许多炎症性疾病模型中,RIPK3缺陷小鼠表现出炎症减轻。这些结果被解释为坏死性下垂是RIPK3诱导炎症的关键驱动因素的证据。有趣的是,最近的研究表明,RIPK3还调节核因子-κB、炎性小体激活和非激活型细胞凋亡。这些研究还表明,这些非坏死性功能在疾病的发病机制中起着重要作用。在这篇综述中,我们总结了我们对RIPK3的坏死性和非坏死性功能的了解,并讨论了这些作用是如何在RIPK3介导的炎症中起作用的。
Receptor interacting protein kinase 3 (RIPK3) is an essential serine/threonine kinase for necroptosis, a type of regulated necrosis. A variety of stimuli can cause RIPK3 activation through phosphorylation. Activated RIPK3 in turn phosphorylates and activates the downstream necroptosis executioner mixed lineage kinase domain-like (MLKL). Necroptosis is a highly inflammatory type of cell death because of the release of intracellular immunogenic contents from disrupted plasma membrane. Indeed, RIPK3-deficient mice exhibited reduced inflammation in many inflammatory disease models. These results have been interpreted as evidence that necroptosis is a key driver for RIPK3-induced inflammation. Interestingly, recent studies show that RIPK3 also regulates NF-κB, inflammasome activation, and kinase-independent apoptosis. These studies also reveal that these non-necroptotic functions contribute significantly to disease pathogenesis. In this review, we summarize our current understanding of necroptotic and non-necroptotic functions of RIPK3 and discuss how these effects contribute to RIPK3-mediated inflammation.
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