Intestinal anti-inflammatory effects of probiotics in DNBS-colitis via modulation of gut microbiota and microRNAs.

European Journal of Nutrition
Francesca AlgieriAlba Rodríguez-Nogales

Abstract

Probiotics have been shown to exert beneficial effects in IBD although their exact mechanisms are not completely understood. The aim of the present study was to assess the intestinal anti-inflammatory activity of different probiotics (Lactobacillus fermentum CECT5716, Lactobacillus salivarius CECT5713, Escherichia coli Nissle 1917, Saccharomyces boulardii CNCMI-745 in the dinitrobenzene sulfonic acid (DNBS) model of mouse colitis and correlate it with the modifications of the gut microbiota and the immune response, focusing on miRNA expression. The probiotics were daily administered orally for 25 days. On day 19 colitis was induced by rectal installation of DNBS. At the end of the treatment, mice were sacrificed and the colonic damage was assessed biochemically by analysing the expression of different markers involved in the immune response, including miRNAs; and the colonic microbiota by pyrosequencing. Probiotics properties were also evaluated in vitro in different immune cell types (CMT-93 intestinal epithelial cells and bone marrow-derived macrophages), where the expression of different mRNAs and miRNAs was examined. All the probiotics displayed intestinal anti-inflammatory effects but slightly different, especially regardi...Continue Reading

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