Loss of Mitochondrial Protease CLPP Activates Type I IFN Responses through the Mitochondrial DNA-cGAS-STING Signaling Axis.
Loss of Mitochondrial Protease CLPP Activates Type I IFN Responses through the Mitochondrial DNA-cGAS-STING Signaling Axis.
复制标题
线粒体蛋白水解酶CLPP缺失通过线粒体DNA-cGAS-STING信号轴激活I型干扰素应答。
DOI:
10.4049/jimmunol.2001016
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发表时间:
2021-04-15
期刊:
影响因子:
--
通讯作者:
West AP
中科院分区:
文献类型:
--
作者:
Torres-Odio S;Lei Y;Gispert S;Maletzko A;Key J;Menissy SS;Wittig I;Auburger G;West AP
Caseinolytic mitochondrial matrix peptidase proteolytic subunit, CLPP, is a serine protease that degrades damaged or misfolded mitochondrial proteins. CLPP null mice exhibit growth retardation, deafness, and sterility, resembling human Perrault syndrome (PS), but also display immune system alterations. However, the molecular mechanisms and signaling pathways underlying immunological changes in CLPP null mice remain unclear. Here we report the steady state activation of type I interferon (IFN-I) signaling and antiviral gene expression in CLPP deficient cells and tissues, resulting in marked resistance to RNA and DNA virus infection. Depletion of the cyclic GMP-AMP (cGAS)-Stimulator of Interferon Genes (STING) DNA sensing pathway reduces steady state IFN-I signaling and abrogates the broad antiviral phenotype of CLPP null cells. Moreover, we report that CLPP deficiency leads to mitochondrial DNA (mtDNA) instability and packaging alterations. Pharmacological and genetic approaches to deplete mtDNA or inhibit cytosolic release markedly reduce antiviral gene expression, implicating mtDNA stress as the driver of IFN-I signaling in CLPP null mice. Our work places the cGAS-STING-IFN-I innate immune pathway downstream of CLPP and may have implications for understanding PS and other human diseases involving CLPP dysregulation.
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作者:
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通讯作者:
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DOI:
10.1016/j.bbamcr.2011.06.007
发表时间:
2012-01
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Biochimica et biophysica acta
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