Differential requirement for Caspase-1 autoproteolysis in pathogen-induced cell death and cytokine processing.

Differential requirement for Caspase-1 autoproteolysis in pathogen-induced cell death and cytokine processing.
复制标题

DOI:
10.1016/j.chom.2010.11.007
复制
发表时间:
2010-12-16
影响因子:
30.3
通讯作者:
Monack DM
Monack DM
中科院分区:
医学1区
文献类型:
--
作者:
Broz P;von Moltke J;Jones JW;Vance RE;Monack DM

文献摘要

参考文献

被引文献

相似文献

半胱氨酸蛋白酶Caspase-1的激活是对感染的先天免疫应答中的关键事件。作为前蛋白合成,胱天蛋白酶-1在称为炎性体的多蛋白复合物内经历自蛋白水解。活化的半胱天冬酶-1是蛋白水解加工和释放细胞因子白细胞介素-1 β和白细胞介素-18所必需的,并且还可以引起快速的巨噬细胞死亡。我们表明,巨噬细胞死亡和细胞因子成熟,在感染不同的细菌病原体可以分离的遗传和两个不同的炎性复合物介导这些事件。含有信号传导衔接子Asc的炎性小体形成单个大的“病灶”,其中胱天蛋白酶-1经历自蛋白水解并加工IL-1β/IL-18。相比之下,Asc-independent炎性小体激活Caspase-1,而不进行蛋白水解,并且在胞质溶胶中不形成任何大的结构。Caspase-1突变体不能进行自蛋白水解促进细胞快速死亡,但不能有效地处理IL-1β/18。我们的研究结果表明,在响应细菌病原体的空间和功能不同的炎性体复合物的形成。
Activation of the cysteine protease Caspase-1 is a key event in the innate immune response to infections. Synthesized as a pro-protein, Caspase-1 undergoes autoproteolysis within multi-protein complexes called inflammasomes. Activated Caspase-1 is required for proteolytic processing and release of the cytokines interleukin-1β and interleukin-18, and can also cause rapid macrophage cell death. We show that macrophage cell death and cytokine maturation in response to infection with diverse bacterial pathogens can be separated genetically and that two distinct inflammasome complexes mediate these events. Inflammasomes containing the signaling adaptor Asc form a single large ‘focus’ in which Caspase-1 undergoes autoproteolysis and processes IL-1β/IL-18. In contrast, Asc-independent inflammasomes activate Caspase-1 without autoproteolysis and do not form any large structures in the cytosol. Caspase-1 mutants unable to undergo autoproteolysis promoted rapid cell death, but processed IL-1β/18 inefficiently. Our results suggest the formation of spatially and functionally distinct inflammasomes complexes in response to bacterial pathogens.
DOI: 10.1073/pnas.0913087107
发表时间: 2010-02-16
影响因子: 11.1
作者:
Miao, Edward A.;Mao, Dat P.;Aderem, Alan
通讯作者: Aderem, Alan
DOI: 10.1038/ni1346
发表时间: 2006-06-01
期刊: NATURE IMMUNOLOGY
影响因子: 30.5
作者:
Franchi, Luigi;Amer, Amal;Nunez, Gabriel
通讯作者: Nunez, Gabriel
DOI: 10.1002/eji.200940185
发表时间: 2010-03
影响因子: 5.4
作者:
Hornung, Veit;Latz, Eicke
通讯作者: Latz, Eicke
DOI: 10.1073/pnas.1003738107
发表时间: 2010-05-25
影响因子: 11.1
作者:
Jones, Jonathan W.;Kayagaki, Nobuhiko;Monack, Denise M.
通讯作者: Monack, Denise M.
DOI: 10.1074/jbc.c100250200
发表时间: 2001-07-27
影响因子: 4.8
作者:
Poyet, JL;Srinivasula, SM;Alnemri, ES
通讯作者: Alnemri, ES