Format

Send to

Choose Destination
See comment in PubMed Commons below
Dig Dis Sci. 2014 Mar;59(3):631-7. doi: 10.1007/s10620-013-2961-x. Epub 2013 Nov 27.

Different gastric mucosa and CagA status of patients in India and Japan infected with Helicobacter pylori.

Author information

1
Department of Gastroenterology and Hepatology, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo, 162-8655, Japan, fuji.kei.01@gmail.com.

Abstract

BACKGROUND AND AIM:

Despite similar incidence of Helicobacter pylori infection, the frequency of gastric cancer is sevenfold higher in Japan than in India. The objective of this work was to define differences in H. pylori-induced gastritis and to identify the bacterial virulence factors involved.

MATERIALS AND METHODS:

We prospectively enrolled 353 consecutive patients who underwent endoscopy and received three gastric biopsies in Tokyo, Japan, and Hyderabad, India. Immunohistochemistry against H. pylori and East Asian CagA and hematoxylin-eosin and Giemsa stain were used to examine gastric mucosal biopsy specimens. Histological scores were assessed in accordance with the updated Sydney System. Subjects with H. pylori infection were matched by age and sex to compare histopathology and bacterial virulence.

RESULTS:

Sixty patients infected with H. pylori were prospectively selected. Median histological scores for neutrophil and mononuclear cell infiltration and for atrophy were significantly higher in Japan than in India (neutrophils 4.0 vs 3.0, p < 0.01; mononuclear cells 5.0 vs 4.5, p = 0.03; atrophy 3.0 vs 2.0, p < 0.01, respectively). Scores for H. pylori density and intestinal metaplasia were also higher in Japan, albeit without statistical significance (H. pylori 5.0 vs 3.0, p = 0.08; intestinal metaplasia 0.0 vs 0.0, p = 0.08). Prevalence of East Asian CagA-positive H. pylori was significantly higher in Japan (73.3 vs 0.0 %, p < 0.01).

CONCLUSION:

The significantly higher prevalence of histologically severe gastritis and East Asian CagA in patients from Japan with H. pylori infection may be involved in the pathogenesis of gastric cancer.

PMID:
24282059
DOI:
10.1007/s10620-013-2961-x
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Springer
    Loading ...
    Support Center