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| Content Provider | PubMed Central |
|---|---|
| Author | Karina, Mazariego-espinosa Cruz, Ariadnna Ledesma, Maria A. Ochoa, Sara A. Juan, Xicohtencatl-cortes |
| Copyright Year | 2010 |
| Abstract | Enterotoxigenic Escherichia coli (ETEC) is the leading bacterial cause of diarrhea in the developing world, as well as the most common cause of traveler's diarrhea. The main hallmarks of this type of bacteria are the expression of one or more enterotoxins and fimbriae used for attachment to host intestinal cells. Longus is a pilus produced by ETEC. These bacteria grown in pleuropneumonia-like organism (PPLO) broth at 37°C and in 5% CO2 produced longus, showing that the assembly and expression of the pili depend on growth conditions and composition of the medium. To explore the role of longus in the adherence to epithelial cells, quantitative and qualitative analyses were done, and similar levels of adherence were observed, with values of 111.44 × 104 CFU/ml in HT-29, 101.33 × 104 CFU/ml in Caco-2, and 107.11 × 104 CFU/ml in T84 cells. In addition, the E9034AΔlngA strain showed a significant reduction in longus adherence of 32% in HT-29, 22.28% in Caco-2, and 21.68% in T84 cells compared to the wild-type strain. In experiments performed with nonintestinal cells (HeLa and HEp-2 cells), significant differences were not observed in adherence between E9034A and derivative strains. Interestingly, the E9034A and E9034AΔlngA(pLngA) strains were 30 to 35% more adherent in intestinal cells than in nonintestinal cells. Twitching motility experiments were performed, showing that ETEC strains E9034A and E9034AΔlngA(pLngA) had the capacity to form spreading zones while ETEC E9034AΔlngA does not. In addition, our data suggest that longus from ETEC participates in the colonization of human colonic cells. |
| Related Links | http://dx.doi.org/10.1128/jb.01595-09 |
| Ending Page | 2800 |
| Page Count | 10 |
| Starting Page | 2791 |
| File Format | |
| ISSN | 00219193 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 11 |
| Volume Number | 192 |
| Language | English |
| Publisher | American Society for Microbiology (ASM) |
| Publisher Date | 2010-06-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology (ASM) |
| Subject Keyword | Molecular Biology Microbiology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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