NLRP1 restricts butyrate producing commensals to exacerbate inflammatory bowel disease
Details
Publication Year 2018-09-13, Volume 9, Issue #1, Page 3728
Journal Title
Nature Communications
Publication Type
Journal Article
Abstract
Anti-microbial signaling pathways are normally triggered by innate immune receptors when detecting pathogenic microbes to provide protective immunity. Here we show that the inflammasome sensor Nlrp1 aggravates DSS-induced experimental mouse colitis by limiting beneficial, butyrate-producing Clostridiales in the gut. The colitis-protective effects of Nlrp1 deficiency are thus reversed by vancomycin treatment, but recapitulated with butyrate supplementation in wild-type mice. Moreover, an activating mutation in Nlrp1a increases IL-18 and IFNgamma production, and decreases colonic butyrate to exacerbate colitis. We also show that, in patients with ulcerative colitis, increased NLRP1 in inflamed regions of the colon is associated with increased IFN-gamma. In this context, NLRP1, IL-18 or IFN-gamma expression negatively correlates with the abundance of Clostridiales in human rectal mucosal biopsies. Our data identify the NLRP1 inflammasome to be a key negative regulator of protective, butyrate-producing commensals, which therefore promotes inflammatory bowel disease.
Publisher
Springer Nature
WEHI Research Division(s)
Inflammation; Bioinformatics; Molecular Immunology; Systems Biology And Personalised Medicine
PubMed ID
30214011
Open Access at Publisher's Site
https://doi.org/10.1038/s41467-018-06125-0
Rights Notice
Refer to copyright notice on published article.


Creation Date: 2018-09-21 02:32:27
Last Modified: 2018-09-21 03:05:24
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