A mixture of kefir-isolated bacteria and yeasts inhibits Shigella flexneri invasion and modulates the proinflammatory response on intestinal epithelial cells

BOLLA PA; ABRAHAM AG; PÉREZ PF; SERRADELL MA

Beneficial Microbes

Wageningen Academic Publishers

Año: 2016 vol. 7 p. 103 - 110

1876-2883

The aim of this work was to evaluate the ability of a kefir-isolated microbial mixture containing three bacterial and two yeast strains (MM) to protect intestinal epithelial cells against Shigella flexneri invasion, as well as to analyse the effect on pro-inflammatory response elicited by this pathogen. A significant decrease in S. flexneri strain 72 invasion was observed on both HT-29 and Caco-2 cells pre-incubated with MM. Pre-incubation with the individual strains Saccharomyces cerevisiae CIDCA 8112, or Lactococcus lactis subp lactisCIDCA 8221 also reduced the internalization of S. flexneri into HT-29 cells although in a lesser extent than MM. Interestingly, Lactobacillus plantarum CIDCA 83114 exerted a protective effect on the invasion of Caco-2 and HT-29 cells by S. flexneri. Regarding proinflammatory response on HT-29 cells, S. flexneri infection induced a significant activation of the expression of IL-8, CCL20 and TNF-α encoding genes (P