Pathogenic Role of Associated Adherent‐Invasive Escherichia coli in Crohn's Disease

Several lines of evidence suggest that adherent‐invasive Escherichia coli (AIEC) strains play an important role in Crohn's disease (CD). The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. Organ cultures of colonic biopsies fr...

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Veröffentlicht in:Journal of cellular physiology 2017-10, Vol.232 (10), p.2860-2868
Hauptverfasser: Mazzarella, Giuseppe, Perna, Angelica, Marano, Angela, Lucariello, Angela, Rotondi Aufiero, Vera, Sorrentino, Alida, Melina, Raffaele, Guerra, Germano, Taccone, Fabio Silvio, Iaquinto, Gaetano, De Luca, Antonio
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container_end_page 2868
container_issue 10
container_start_page 2860
container_title Journal of cellular physiology
container_volume 232
creator Mazzarella, Giuseppe
Perna, Angelica
Marano, Angela
Lucariello, Angela
Rotondi Aufiero, Vera
Sorrentino, Alida
Melina, Raffaele
Guerra, Germano
Taccone, Fabio Silvio
Iaquinto, Gaetano
De Luca, Antonio
description Several lines of evidence suggest that adherent‐invasive Escherichia coli (AIEC) strains play an important role in Crohn's disease (CD). The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. Organ cultures of colonic biopsies from patients were set up to assess the effects of LF82 and O83:H1 on the expression of CEACAM6, LAMP1, HLA‐DR, ICAM1 by immunohistochemistry and of IL‐8, IFNʏ, and TNF‐α genes by RT‐PCR. Moreover, on Caco2 cells, we analyzed the cell cycle, the expression of MGMT and DNMT1 genes, and DNA damage induced by LF82 and O83:H1, by FACS, RT‐PCR, and DAPI staining, respectively. Epithelial and lamina propria mononuclear cells (LPMNC) expression of CEACAM6 and LAMP1 were higher in biopsies cultured in the presence of both O83:H1 and LF82 than in biopsies cultured with non‐pathogenic E. coli. Both AIEC strains induced increased expression of ICAM‐1 on blood vessels and HLA‐DR on LPMNC. We observed higher levels of TNF‐α, IFN‐γ, and IL‐8 transcripts in biopsies cultured with both AIEC strains than in those cultured with NP. Both LF82 and O83:H1, block the cell cycle into S phase, inducing DNA damage, and modulate the expression of DNMT1 and MGMT genes. Our data suggest that LF82 and 083:H1 strains of E. coli are able to increase in CD colonic biopsies the expression of all the pro‐inflammatory cytokines and all the mucosal immune markers investigated. J. Cell. Physiol. 232: 2860–2868, 2017. © 2016 Wiley Periodicals, Inc. Adherent‐invasive Escherichia coli (AIEC) strains play an important role in Crohn's disease (CD). The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. LF82 and 083:H1 strains of E. coli are able to increase in CD colonic biopsies the expression of all the pro‐inflammatory cytokines and all the mucosal immune markers investigated.
doi_str_mv 10.1002/jcp.25717
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The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. Organ cultures of colonic biopsies from patients were set up to assess the effects of LF82 and O83:H1 on the expression of CEACAM6, LAMP1, HLA‐DR, ICAM1 by immunohistochemistry and of IL‐8, IFNʏ, and TNF‐α genes by RT‐PCR. Moreover, on Caco2 cells, we analyzed the cell cycle, the expression of MGMT and DNMT1 genes, and DNA damage induced by LF82 and O83:H1, by FACS, RT‐PCR, and DAPI staining, respectively. Epithelial and lamina propria mononuclear cells (LPMNC) expression of CEACAM6 and LAMP1 were higher in biopsies cultured in the presence of both O83:H1 and LF82 than in biopsies cultured with non‐pathogenic E. coli. Both AIEC strains induced increased expression of ICAM‐1 on blood vessels and HLA‐DR on LPMNC. We observed higher levels of TNF‐α, IFN‐γ, and IL‐8 transcripts in biopsies cultured with both AIEC strains than in those cultured with NP. Both LF82 and O83:H1, block the cell cycle into S phase, inducing DNA damage, and modulate the expression of DNMT1 and MGMT genes. Our data suggest that LF82 and 083:H1 strains of E. coli are able to increase in CD colonic biopsies the expression of all the pro‐inflammatory cytokines and all the mucosal immune markers investigated. J. Cell. Physiol. 232: 2860–2868, 2017. © 2016 Wiley Periodicals, Inc. Adherent‐invasive Escherichia coli (AIEC) strains play an important role in Crohn's disease (CD). The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. 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The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. Organ cultures of colonic biopsies from patients were set up to assess the effects of LF82 and O83:H1 on the expression of CEACAM6, LAMP1, HLA‐DR, ICAM1 by immunohistochemistry and of IL‐8, IFNʏ, and TNF‐α genes by RT‐PCR. Moreover, on Caco2 cells, we analyzed the cell cycle, the expression of MGMT and DNMT1 genes, and DNA damage induced by LF82 and O83:H1, by FACS, RT‐PCR, and DAPI staining, respectively. Epithelial and lamina propria mononuclear cells (LPMNC) expression of CEACAM6 and LAMP1 were higher in biopsies cultured in the presence of both O83:H1 and LF82 than in biopsies cultured with non‐pathogenic E. coli. Both AIEC strains induced increased expression of ICAM‐1 on blood vessels and HLA‐DR on LPMNC. We observed higher levels of TNF‐α, IFN‐γ, and IL‐8 transcripts in biopsies cultured with both AIEC strains than in those cultured with NP. Both LF82 and O83:H1, block the cell cycle into S phase, inducing DNA damage, and modulate the expression of DNMT1 and MGMT genes. Our data suggest that LF82 and 083:H1 strains of E. coli are able to increase in CD colonic biopsies the expression of all the pro‐inflammatory cytokines and all the mucosal immune markers investigated. J. Cell. Physiol. 232: 2860–2868, 2017. © 2016 Wiley Periodicals, Inc. Adherent‐invasive Escherichia coli (AIEC) strains play an important role in Crohn's disease (CD). The objective of this study was to investigate the pathogenic role of two AIEC strains, LF82 and O83:H1, in CD patients. 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subjects Adult
Aged
Bacterial Adhesion
Biopsy
Blood vessels
Caco-2 Cells
Cell cycle
Colon - immunology
Colon - metabolism
Colon - microbiology
Colon - pathology
Crohn Disease - immunology
Crohn Disease - metabolism
Crohn Disease - microbiology
Crohn Disease - pathology
Crohn's disease
Cytokines
Cytokines - immunology
Cytokines - metabolism
Deoxyribonucleic acid
DNA
DNA damage
DNMT1 protein
E coli
Escherichia coli - immunology
Escherichia coli - isolation & purification
Escherichia coli - pathogenicity
Escherichia coli Infections - immunology
Escherichia coli Infections - metabolism
Escherichia coli Infections - microbiology
Escherichia coli Infections - pathology
Female
Flow cytometry
Gene expression
Genes
Histocompatibility antigen HLA
Host-Pathogen Interactions
Humans
Immunity, Mucosal
Immunohistochemistry
Inflammation
Inflammation Mediators - immunology
Inflammation Mediators - metabolism
Inflammatory bowel diseases
Intercellular adhesion molecule 1
Interleukin 8
Intestinal Mucosa - immunology
Intestinal Mucosa - metabolism
Intestinal Mucosa - microbiology
Intestinal Mucosa - pathology
Lamina propria
Leukocytes (mononuclear)
Male
Middle Aged
Mucosal immunity
Patients
Polymerase chain reaction
S phase
Staining
Studies
Tissue Culture Techniques
Tumor necrosis factor-α
Virulence
Young Adult
γ-Interferon
title Pathogenic Role of Associated Adherent‐Invasive Escherichia coli in Crohn's Disease
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