Microbiota-induced activation of epithelial IL-6 signaling links inflammasome-driven inflammation

Bo Hu, Eran Elinav, Samuel Huber, Till Strowig, Liming Hao, Anja Hafemann, Chengcheng Jin, Stephanie C. Eisenbarth, Richard A. Flavell*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

196 Scopus citations

Abstract

The microbiota is pivotal in the pathogenesis of inflammatory bowel disease (IBD)-associated inflammation-induced colorectal cancer (CRC), yet mechanisms for these effects remain poorly characterized. Here, we demonstrate that aberrant inflammasome-induced microbiota plays a critical role in CRC development, where mice deficient in the NOD-like receptor family pyrin domain containing 6 (NLRP6) inflammasome feature enhanced inflammation-induced CRC formation. Intriguingly, WT mice cohoused either with inflammasome-deficient mice or with mice lacking IL-18 feature exacerbated inflammation-induced CRC compared with singly housed WT mice. Enhanced tumorigenesis is dependent on microbiota-induced chemokine (C-C motif) ligand 5 (CCL5)-driven inflammation, which in turn promotes epithelial cell proliferation through local activation of the IL-6 pathway, leading to cancer formation. Altogether, our results mechanistically link the altered microbiota with the pathogenesis of inflammation-induced CRC and suggest that in some conditions, microbiota components may transfer CRC susceptibility between individuals.

Original languageEnglish (US)
Pages (from-to)9862-9867
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number24
DOIs
StatePublished - Jun 11 2013
Externally publishedYes

Keywords

  • ASC
  • Colon cancer
  • Microflora

ASJC Scopus subject areas

  • General

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