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© Benoît Chassaing
Interaction microbiote-mucus à la surface de l’épithélium colique humain
Publication : World journal of gastrointestinal pharmacology and therapeutics

Tryptophan: A gut microbiota-derived metabolites regulating inflammation.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in World journal of gastrointestinal pharmacology and therapeutics - 06 Feb 2017

Etienne-Mesmin L, Chassaing B, Gewirtz AT

Link to Pubmed [PMID] – 28217370

Link to DOI – 10.4292/wjgpt.v8.i1.7

World J Gastrointest Pharmacol Ther 2017 Feb; 8(1): 7-9

Inflammatory bowel diseases (IBD), which comprise Crohn’s disease and ulcerative colitis, are chronic intestinal disorders with an increased prevalence and incidence over the last decade in many different regions over the world. The etiology of IBD is still not well defined, but evidence suggest that it results from perturbation of the homeostasis between the intestinal microbiota and the mucosal immune system, with the involvement of both genetic and environmental factors. Genome wide association studies, which involve large-scale genome-wide screening of potential polymorphism, have identified several mutations associated with IBD. Among them, Card9, a gene encoding an adapter molecule involved in innate immune response to fungi (via type C-lectin sensing) through the activation of IL-22 signaling pathway, has been identified as one IBD susceptible genes. Dietary compounds, which represent a source of energy and metabolites for gut bacteria, are also appreciated to be important actors in the etiology of IBD, for example by altering gut microbiota composition and by regulating the generation of short chain fatty acids. A noteworthy study published in the June 2016 issue of Nature Medicine by Lamas and colleagues investigates the interaction between Card9 and the gut microbiota in the generation of the microbiota-derived tryptophan metabolite. This study highlights the role of tryptophan in dampening intestinal inflammation in susceptible hosts.