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 language | English |
|---|---|
| Pages (from-to) | 1121-1124 |
| Number of pages | 4 |
| Journal | Microbes and Infection |
| Volume | 4 |
| Issue number | 11 |
| DOIs | |
| State | Published - Sep 2002 |
| Externally published | Yes |
Keywords
- Intestinal epithelial cells
- Mucins
- Shigella
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