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Epithelial inflammation response induced by Shigella flexneri depends on mucin gene expression

  • Sophie Nutten
  • , Philippe Sansonetti
  • , Guillemette Huet
  • , Caroline Bourdon-Bisiaux
  • , Bertrand Meresse
  • , Jean Frédéric Colombel
  • , Pierre Desreumaux

Research output: Contribution to journalReview articlepeer-review

34 Scopus citations

Abstract

The protective effects of different mucin gene profiles on gut protection were assessed by the evaluation of TNFα production by intestinal epithelial cells infected by Shigella flexneri. Three HT-29 cell lines were used: HT29-G- (enterocyte-like cells, secreting no mucins), HT29-FU (highly expressing MUC2 and MUC4) and HT29-MTX (highly expressing MUC3 and MUC5AC). These cells were infected either by an invasive (M90T) or the control isogenic (BS176) strains of S. flexneri, and TNFα mRNA production was quantified by competitive PCR. In the HT29-G- cells, M90T induced an increased production of TNFα mRNA compared to BS176, giving a TNFα ratio of 5.6 ± 3.3. In contrast, similar levels of TNFα mRNA were detected in HT29-FU and HT29-MTX cells stimulated with either M90T or BS176, giving ratios of 1.4 ± 1.3 and 1.0 ± 0.1, respectively. The results suggest that mucin genes have abilities to protect epithelial cells against S. flexneri. Furthermore, the difference in the TNFα ratio between the HT29-FU and HT29-MTX cells suggests distinct protective effects for these two mucin-secreting epithelial cells.

Original languageEnglish
Pages (from-to)1121-1124
Number of pages4
JournalMicrobes and Infection
Volume4
Issue number11
DOIs
StatePublished - Sep 2002
Externally publishedYes

Keywords

  • Intestinal epithelial cells
  • Mucins
  • Shigella

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