NLRP6 inflammasome regulates colonic microbial ecology and risk for colitis.

NLRP6 inflammasome regulates colonic microbial ecology and risk for colitis.
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DOI:
10.1016/j.cell.2011.04.022
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发表时间:
2011-05-27
期刊:
影响因子:
64.5
通讯作者:
Flavell RA
Flavell RA
中科院分区:
生物学1区
文献类型:
--
作者:
Elinav E;Strowig T;Kau AL;Henao-Mejia J;Thaiss CA;Booth CJ;Peaper DR;Bertin J;Eisenbarth SC;Gordon JI;Flavell RA

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Inflammasomes are multi-protein complexes that function as sensors of endogenous or exogenous damage-associated molecular patterns. Here we show that deficiency of NLRP6 in mouse colonic epithelial cells results in reduced IL-18 levels and altered fecal microbiota characterized by expanded representation of the bacterial phyla Bacteroidetes (Prevotellaceae) and TM7. NLRP6 inflammasome-deficient mice were characterized by spontaneous intestinal hyperplasia, inflammatory cell recruitment, and exacerbation of chemical colitis induced by exposure to dextran sodium sulfate (DSS). Cross-fostering and cohousing experiments revealed that the colitogenic activity of this microbiota is transferable to neonatal or adult wild-type mice, leading to exacerbation of DSS colitis via induction of CCL5. Antibiotic treatment and electron microscopy studies further supported the role of Prevotellaceae as a key representative of this microbiota-associated phenotype. Altogether, perturbations in this inflammasome pathway, including NLRP6, ASC, caspase-1 and IL-18 may constitute a predisposing or initiating event in some cases of human IBD.
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