Western diet induces a shift in microbiota composition enhancing susceptibility to Adherent-Invasive E. coli infection and intestinal inflammation

Sci Rep. 2016 Jan 8;6:19032. doi: 10.1038/srep19032.


Recent advances have shown that the abnormal inflammatory response observed in CD involves an interplay among intestinal microbiota, host genetics and environmental factors. The escalating consumption of fat and sugar in Western countries parallels an increased incidence of CD during the latter 20(th) century. The impact of a HF/HS diet in mice was evaluated for the gut micro-inflammation, intestinal microbiota composition, function and selection of an E. coli population. The HF/HS diet created a specific inflammatory environment in the gut, correlated with intestinal mucosa dysbiosis characterized by an overgrowth of pro-inflammatory Proteobacteria such as E. coli, a decrease in protective bacteria, and a significantly decreased of SCFA concentrations. The expression of GPR43, a SCFA receptor was reduced in mice treated with a HF/HS diet and reduced in CD patients compared with controls. Interestingly, mice treated with an agonist of GPR43 were protected against DSS-induced colitis. Finally, the transplantation of feces from HF/HS treated mice to GF mice increased susceptibility to AIEC infection. Together, our results demonstrate that a Western diet could aggravate the inflammatory process and that the activation of the GPR43 receptor pathway could be used as a new strategy to treat CD patients.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bacterial Adhesion / drug effects
  • Benzeneacetamides / pharmacology
  • Colitis / chemically induced
  • Colitis / genetics
  • Colitis / microbiology*
  • Colitis / prevention & control
  • Crohn Disease / etiology
  • Crohn Disease / genetics
  • Crohn Disease / microbiology
  • Crohn Disease / prevention & control
  • Diet, High-Fat / adverse effects
  • Diet, Western / adverse effects*
  • Dietary Sucrose / adverse effects
  • Disease Susceptibility*
  • Dysbiosis / etiology*
  • Dysbiosis / genetics
  • Dysbiosis / microbiology
  • Dysbiosis / prevention & control
  • Escherichia coli / growth & development
  • Escherichia coli / metabolism
  • Escherichia coli / pathogenicity
  • Fatty Acids, Volatile / metabolism
  • Fecal Microbiota Transplantation
  • Female
  • Gastrointestinal Microbiome / drug effects*
  • Gene Expression Regulation
  • Gene-Environment Interaction
  • Humans
  • Intestinal Mucosa / drug effects
  • Intestinal Mucosa / microbiology
  • Intestinal Mucosa / pathology
  • Male
  • Mice
  • Receptors, G-Protein-Coupled / agonists
  • Receptors, G-Protein-Coupled / genetics*
  • Receptors, G-Protein-Coupled / metabolism
  • Sodium Dodecyl Sulfate


  • Benzeneacetamides
  • Dietary Sucrose
  • Fatty Acids, Volatile
  • Ffar2 protein, mouse
  • Receptors, G-Protein-Coupled
  • Sodium Dodecyl Sulfate