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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell 2014 ; 159 (7): 1563-77 Nephropedia Template TP
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Apoptotic caspases prevent the induction of type I interferons by mitochondrial DNA #MMPMID25525875
Rongvaux A; Jackson R; Harman CC; Li T; West AP; de Zoete MR; Wu Y; Yordy B; Lakhani SA; Kuan CY; Taniguchi T; Shadel GS; Chen ZJ; Iwasaki A; Flavell RA
Cell 2014[Dec]; 159 (7): 1563-77 PMID25525875show ga
The mechanism by which cells undergo death determines whether dying cells trigger inflammatory responses or remain immunologically silent. Mitochondria play a central role in the induction of cell death, as well as in immune signaling pathways. Here, we identify of a mechanism by which mitochondria and downstream pro-apoptotic caspases regulate the activation of antiviral immunity. In the absence of active caspases, mitochondrial outer membrane permeabilization by Bax and Bak results in the expression of type I interferons (IFNs). This induction is mediated by mitochondrial DNA-dependent activation of the cGAS/STING pathway and results in the establishment of a potent state of viral resistance. Our results show that mitochondria have the capacity to simultaneously expose a cell-intrinsic inducer of the IFN response, and to inactivate this response in a caspase-dependent manner. This mechanism provides a dual control, which determines whether mitochondria initiate an immunologically silent or a pro-inflammatory type of cell death.