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Volume 123, Issue 4, Pages (October 2002)

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Presentation on theme: "Volume 123, Issue 4, Pages (October 2002)"— Presentation transcript:

1 Volume 123, Issue 4, Pages 1205-1215 (October 2002)
Immune-mediated neural dysfunction in a murine model of chronic Helicobacter pylori infection  Přemysl Berčík, Roberto De Giorgio, Patricia Blennerhassett, Elena F. Verdú, Giovanni Barbara, Stephen M. Collins  Gastroenterology  Volume 123, Issue 4, Pages (October 2002) DOI: /gast Copyright © 2002 American Gastroenterological Association Terms and Conditions

2 Fig. 1 Representative H&E staining of gastric corpus (A) from an uninfected Balb/c mouse, (B) 4 months after infection, and (C) 12 months after infection. A predominantly MN infiltrate is present in the mucosa and submucosa (B) with lymphoid aggregates in later stages of the infection (C). Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

3 Fig. 2 EFS of enteric nerves induced antral muscle relaxation in control mice. Chronic H. pylori infection augmented this relaxation. Two months after eradication therapy, EFS-induced relaxation normalized. Data are presented as medians and interquartile ranges. *P < 0.05 vs. control. Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

4 Fig. 3 ACh release after EFS and KCl stimulation. Chronic H. pylori infection progressively decreased (A) EFS-induced ACh release but (B) increased KCl-induced ACh release. Eradication therapy normalized the function of cholinergic nerves. *P < 0.05 vs. control. Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

5 Fig. 4 Chronic H. pylori infection increased the density of (A) SP-IR nerves and (B) CGRP-IR nerves in the stomach. Two months after eradication treatment, the density of SP- and CGRP-IR nerves remained elevated. *P < 0.05 vs. control. Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

6 Fig. 5 (A–C) Representative photomicrographs showing SP-IR nerves in the spinal cord from (A) an uninfected mouse, (B) a mouse 10 months after infection, and (C) a mouse 2 months after eradication of H. pylori. (D–F) Representative images of CGRP-IR nerves in the spinal cord from (D) an uninfected mouse, (E) a mouse 10 months after infection, and (F) a mouse 2 months after eradication of H. pylori. Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

7 Fig. 6 (A) Occasional F4/80-positive cells (arrow) in the submucosa of an uninfected Balb/c mouse. (B) F4/80-positive cells appear both in the mucosa (arrowhead) and the muscle layer (arrow) in a mouse 4 months after infection. (C) At 12 months after infection, the number of F4/80-positive cells further increases, many of them being part of the chronic inflammatory infiltrate in the submucosa (*). Macrophages are also present at the region of the myenteric plexus (arrow). Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions

8 Fig. 7 Impairment of ACh release after EFS correlates with the degree of MN infiltration of the stomach. Gastroenterology  , DOI: ( /gast ) Copyright © 2002 American Gastroenterological Association Terms and Conditions


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