Mutation of NLRC4 causes a syndrome of enterocolitis and autoinflammation.

Mutation of NLRC4 causes a syndrome of enterocolitis and autoinflammation.
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DOI:
10.1038/ng.3066
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发表时间:
2014-10
期刊:
影响因子:
30.8
通讯作者:
Lifton, Richard P.
Lifton, Richard P.
中科院分区:
生物学1区
文献类型:
--
作者:
Romberg, Neil;Al Moussawi, Khatoun;Nelson-Williams, Carol;Stiegler, Amy L.;Loring, Erin;Choi, Murim;Overton, John;Meffre, Eric;Khokhal, Mustafa K.;Huttner, Anita J.;West, Brian;Podoltsev, Nikolai A.;Boggon, Titus J.;Kazmierczak, Barbara I.;Lifton, Richard P.

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Upon detection of pathogen-associated molecular patterns, innate immune receptors initiate inflammatory responses. These receptors include cytoplasmic NOD-like receptors (NLRs), whose stimulation recruits and proteolytically activates caspase-1 within the inflammasome, a multi-protein complex. Caspase-1 mediates the production of interleukin-1 family cytokines (IL1FCs), leading to fever, and inflammatory cell death (pyroptosis). Mutations that constitutively activate these pathways underlie several autoinflammatory diseases with diverse clinical features. We describe a family with a previously unreported syndrome featuring neonatal-onset enterocolitis, periodic fever, and fatal/near-fatal episodes of autoinflammation caused by a de novo gain-of-function mutation (p.V341A) in the HD1 domain of NLRC4 that co-segregates with disease. Mutant NLRC4 causes constitutive Interleukin-1 family cytokine production and macrophage cell death. Infected patient macrophages are polarized toward pyroptosis and exhibit abnormal staining for inflammasome components. These findings describe and reveal the cause of a life-threatening but treatable autoinflammatory disease that underscores the divergent roles of the NLRC4 inflammasome.
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