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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.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Kirurgi. Linköpings universitet, Hälsouniversitetet.
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2011 (engelsk)Inngår i: JOURNAL OF CLINICAL INVESTIGATION, ISSN 0021-9738, Vol. 121, nr 3, s. 966-975Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
American Society for Clinical Investigation , 2011. Vol. 121, nr 3, s. 966-975
HSV kategori
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URN: urn:nbn:se:liu:diva-66876DOI: 10.1172/JCI44632ISI: 000287991000017OAI: oai:DiVA.org:liu-66876DiVA, id: diva2:405301
Tilgjengelig fra: 2011-03-22 Laget: 2011-03-21 Sist oppdatert: 2011-03-22

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