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Crohn disease-associated adherent-invasive E. coli bacteria target mouse and human Peyers patches via long polar fimbriae
University Auvergne.
University Auvergne.
University Auvergne.
Linköping University, Department of Clinical and Experimental Medicine, Surgery. Linköping University, Faculty of Health Sciences.
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2011 (English)In: JOURNAL OF CLINICAL INVESTIGATION, ISSN 0021-9738, Vol. 121, no 3, 966-975 p.Article in journal (Refereed) Published
Abstract [en]

Crohn disease (CD) is a multifactorial disease in which an abnormal immune response in the gastrointestinal (GI) tract leads to chronic inflammation. The small intestine, particularly the ileum, of patients with CD is colonized by adherent-invasive E. coil (AIEC) a pathogenic group of E. coil able to adhere to and invade intestinal epithelial cells. As the earliest inflammatory lesions are microscopic erosions of the epithelium lining the Peyers patches (PPs), we investigated the ability of AIEC bacteria to interact with PPs and the virulence factors involved. We found that AIEC bacteria could interact with mouse and human PPs via long polar fimbriae (LPF). An LPF-negative AIEC mutant was highly impaired in its ability to interact with mouse and human PPs and to translocate across monolayers of M cells, specialized epithelial cells at the surface of PPs. The prevalence of AIEC strains harboring the lpf operon was markedly higher in CD patients compared with controls. In addition, increased numbers of AIEC, but not LPF-deficient AIEC, bacteria were found interacting with PPs from Nod2(-/-) mice compared with WT mice. In conclusion, we have identified LPF as a key factor for AIEC to target PPs. This could be the missing link between AIEC colonization and the presence of early lesions in the PPs of CD patients.

Place, publisher, year, edition, pages
American Society for Clinical Investigation , 2011. Vol. 121, no 3, 966-975 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-66876DOI: 10.1172/JCI44632ISI: 000287991000017OAI: diva2:405301
Available from: 2011-03-22 Created: 2011-03-21 Last updated: 2011-03-22

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Salim, Sa´adSöderholm, Johan D
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SurgeryFaculty of Health SciencesDepartment of Surgery in Östergötland
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