Mitochondrial permeabilization engages NF-κB-dependent anti-tumour activity under caspase deficiency.

Mitochondrial permeabilization engages NF-κB-dependent anti-tumour activity under caspase deficiency.
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DOI:
10.1038/ncb3596
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发表时间:
2017-09
影响因子:
21.3
通讯作者:
Tait SWG
Tait SWG
中科院分区:
生物学1区
文献类型:
--
作者:
Giampazolias E;Zunino B;Dhayade S;Bock F;Cloix C;Cao K;Roca A;Lopez J;Ichim G;Proïcs E;Rubio-Patiño C;Fort L;Yatim N;Woodham E;Orozco S;Taraborrelli L;Peltzer N;Lecis D;Machesky L;Walczak H;Albert ML;Milling S;Oberst A;Ricci JE;Ryan KM;Blyth K;Tait SWG

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Apoptosis represents a key anti-cancer therapeutic effector mechanism. During apoptosis, mitochondrial outer membrane permeabilisation (MOMP) typically kills cells even in the absence of caspase activity. Caspase activity can also have a variety of unwanted consequences that include DNA-damage. We therefore investigated whether MOMP-induced caspase-independent cell death (CICD) might be a better way to kill cancer cells. We find that cells undergoing CICD display potent pro-inflammatory effects relative to apoptosis. Underlying this, MOMP was found to stimulate NF-κB activity through the down-regulation of inhibitor of apoptosis (IAP) proteins. Strikingly, engagement of CICD displays potent anti-tumorigenic effects, often promoting complete tumour regression in a manner dependent on intact immunity. Our data demonstrate that by activating NF-κB, MOMP can exert additional signalling functions besides triggering cell death. Moreover, they support a rationale for engaging caspase-independent cell death in cell-killing anti-cancer therapies.
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