Catalytic activity of the caspase-8-FLIP(L) complex inhibits RIPK3-dependent necrosis.

Catalytic activity of the caspase-8-FLIP(L) complex inhibits RIPK3-dependent necrosis.
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DOI:
10.1038/nature09852
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发表时间:
2011-03-17
期刊:
影响因子:
64.8
通讯作者:
Green, Douglas R.
Green, Douglas R.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Oberst, Andrew;Dillon, Christopher P.;Weinlich, Ricardo;McCormick, Laura L.;Fitzgerald, Patrick;Pop, Cristina;Hakem, Razq;Salvesen, Guy S.;Green, Douglas R.

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Caspase-8具有两种相反的生物学功能——它通过触发细胞凋亡的外源性途径促进细胞死亡,但也具有生存活性,因为它是胚胎发育、T淋巴细胞活化和抵抗肿瘤坏死因子-α (TNF)及相关家族配体诱导的坏死所必需的。在这里,我们发现caspase-8缺陷小鼠的发育完全通过受体相互作用蛋白激酶3 (RIPK3)的消融而恢复。缺乏caspase-8和RIPK3的成年动物表现出与CD95或CD95配体缺陷相似的进行性淋巴蓄积性疾病,并且在体内抵抗CD95连接的致命作用。我们发现caspase-8通过与fliclike Inhibitory Protein Long (FLIPL)的蛋白水解活性复合物发挥作用,防止ripk3依赖性坏死而不诱导细胞凋亡,该复合物是保护功能所必需的。
Caspase-8 has two opposing biological functions - it promotes cell death by triggering the extrinsic pathway of apoptosis, but also has a survival activity, as it is required for embryonic development, T lymphocyte activation, and resistance to necrosis induced by Tumor Necrosis Factor-α (TNF) and related family ligands. Here we show that development of caspase-8-deficient mice is completely rescued by ablation of Receptor Interacting Protein Kinase-3 (RIPK3). Adult animals lacking both caspase-8 and RIPK3 display a progressive lymphoaccumulative disease resembling that seen with defects in CD95 or CD95-ligand, and resist the lethal effects of CD95 ligation in vivo. We have found that caspase-8 prevents RIPK3-dependent necrosis without inducing apoptosis by functioning in a proteolytically active complex with FLICE-Like Inhibitory Protein Long (FLIPL), and this complex is required for the protective function.
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发表时间: 2010-05-28
影响因子: 4.8
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