SLC22A4 and colitis: The role of Sutterella in gut inflammation has been reported in UC patients, in which a decrease of this microorganism was correlated with a corticosteroid-free remission of the disease.33 However, when we compared the response to IFX treatment between octn1-/- and WT mice during colitis, we observed an increase of bacterial richness and of Prevotella and Faecalibacterium in octn1-/-.