The inflammasome adaptor ASC regulates the function of adaptive immune cells by controlling Dock2-mediated Rac activation and actin polymerization.
The inflammasome adaptor ASC regulates the function of adaptive immune cells by controlling Dock2-mediated Rac activation and actin polymerization.
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DOI:
10.1038/ni.2095
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发表时间:
2011-09-04
影响因子:
30.5
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The adaptor protein ASC contributes to innate immunity through the assembly of caspase-1-activating inflammasome complexes. We demonstrate that ASC plays an inflammasome-independent cell-intrinsic role in adaptive immune cells. Asc−/− mice displayed defective antigen presentation by dendritic cells and lymphocyte migration due to impaired Rac-mediated actin polymerization. Genome-wide analysis showed that ASC, but not Nlrp3 or caspase-1, controls mRNA stability and expression of DOCK2, a guanine nucleotide exchange factor that mediates Rac-dependent signaling in immune cells. DOCK2-deficient dendritic cells showed similar defective antigen uptake as Asc−/− cells. Ectopic expression of DOCK2 in ASC-deficient cells restored Rac-mediated actin polymerization, antigen uptake and chemotaxis. Thus, ASC shapes adaptive immunity independently of inflammasomes by modulating DOCK2-dependent Rac activation and F-actin polymerization in dendritic cells and lymphocytes.
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DOI:
10.1038/nri2851
发表时间:
2010-10
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
通讯作者:
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影响因子:
158.5
作者:
Jin, Ying;Mailloux, Christina M.;Spritz, Richard A.
通讯作者:
Spritz, Richard A.
影响因子:
4.4
作者:
Kolly, Laeticia;Karababa, Mahir;Busso, Nathalie
通讯作者:
Busso, Nathalie
影响因子:
5.4
作者:
Franchi, Luigi;Stoolman, Joshua;Nunez, Gabriel
通讯作者:
Nunez, Gabriel
影响因子:
30.5
作者:
Franchi, Luigi;Amer, Amal;Nunez, Gabriel
通讯作者:
Nunez, Gabriel