Caspase-8 scaffolding function and MLKL regulate NLRP3 inflammasome activation downstream of TLR3.
Caspase-8 scaffolding function and MLKL regulate NLRP3 inflammasome activation downstream of TLR3.
复制标题
caspase-8脚手架函数和MLKL调节TLR3下游的NLRP3炎性体激活。
DOI:
10.1038/ncomms8515
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发表时间:
2015-06-24
影响因子:
16.6
通讯作者:
Alnemri, Emad S.
中科院分区:
文献类型:
--
作者:
Kang, Seokwon;Fernandes-Alnemri, Teresa;Rogers, Corey;Mayes, Lindsey;Wang, Ying;Dillon, Christopher;Roback, Linda;Kaiser, William;Oberst, Andrew;Sagara, Junji;Fitzgerald, Katherine A.;Green, Douglas R.;Zhang, Jianke;Mocarski, Edward S.;Alnemri, Emad S.
TLR2 promotes NLRP3 inflammasome activation via an early MyD88-IRAK1-dependent pathway that provides a priming signal (signal 1) necessary for activation of the inflammasome by a second potassium-depleting signal (signal 2). Here we show that TLR3 binding to dsRNA promotes post-translational inflammasome activation through intermediate and late TRIF/RIPK1/FADD-dependent pathways. Both pathways require the scaffolding but not the catalytic function of caspase-8 or RIPK1. Only the late pathway requires kinase competent RIPK3 and MLKL function. Mechanistically, FADD/caspase-8 scaffolding function provides a post-translational signal 1 in the intermediate pathway, whereas in the late pathway it helps the oligomerization of RIPK3, which together with MLKL provides both signal 1 and 2 for inflammasome assembly. Cytoplasmic dsRNA activates NLRP3 independent of TRIF, RIPK1, RIPK3 or mitochondrial DRP1, but requires FADD/caspase-8 in wildtype macrophages to remove RIPK3 inhibition. Our study provides a comprehensive analysis of pathways that lead to NLRP3 inflammasome activation in response to dsRNA. Inflammasome activation requires a complex and incompletely understood network of signalling events. Here the authors characterize step-by-step contributions of TLR3, caspase-8, RIPK3 and MLKL to the activation of NLRP3 inflammasome in response to double-stranded RNA.
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影响因子:
32.4
作者:
Kawai, T;Adachi, O;Akira, S
通讯作者:
Akira, S
影响因子:
16
作者:
Mandal P;Berger SB;Pillay S;Moriwaki K;Huang C;Guo H;Lich JD;Finger J;Kasparcova V;Votta B;Ouellette M;King BW;Wisnoski D;Lakdawala AS;DeMartino MP;Casillas LN;Haile PA;Sehon CA;Marquis RW;Upton J;Daley-Bauer LP;Roback L;Ramia N;Dovey CM;Carette JE;Chan FK;Bertin J;Gough PJ;Mocarski ES;Kaiser WJ
通讯作者:
Kaiser WJ
影响因子:
32.4
作者:
Duong, Bao H.;Onizawa, Michio;Oses-Prieto, Juan A.;Advincula, Rommel;Burlingame, Alma;Malynn, Barbara A.;Ma, Averil
通讯作者:
Ma, Averil
影响因子:
4.8
作者:
Kaiser, William J.;Sridharan, Haripriya;Mocarski, Edward S.
通讯作者:
Mocarski, Edward S.
影响因子:
32.4
作者:
Kang, Tae-Bong;Yang, Seung-Hoon;Wallach, David
通讯作者:
Wallach, David