Role of apoptosis induced by Helicobacter pylori infection in the development of duodenal ulcer.

Abstract:

BACKGROUND:Helicobacter pylori affects gastric epithelium integrity by acceleration of apoptosis. However, it remains unclear what product of the bacteria causes apoptosis, or whether or not the apoptosis is involved in the development of ulcers. AIMS:To elucidate the factor from H pylori that causes acceleration of apoptosis and the role of apoptosis in the development of duodenal ulcer in H pylori infection. PATIENTS:Five H pylori negative healthy volunteers, 47 H pylori positive patients with duodenal ulcer, and 35 H pylori positive patients with gastric ulcer. METHODS:An endoscopic examination was carried out to diagnose ulcers and determine their clinical stage. To analyse apoptosis, a cell cycle analysis was performed using biopsy specimens. RESULTS:There was a significant correlation between the urease activity of the H pylori strain and the level of apoptosis induced by this bacterial strain. Moreover, in duodenal ulcer patients infected with H pylori, the patients with an active ulcer exhibited a significantly higher level of apoptosis than those with ulcers at both the healing and scarring stages. CONCLUSION:These findings suggest that acceleration of apoptosis in the antral mucosa caused by the urease of H pylori plays a crucial role in the development of ulcers in the duodenum.

journal_name

Gut

journal_title

Gut

authors

Kohda K,Tanaka K,Aiba Y,Yasuda M,Miwa T,Koga Y

doi

10.1136/gut.44.4.456

keywords:

subject

Has Abstract

pub_date

1999-04-01 00:00:00

pages

456-62

issue

4

eissn

0017-5749

issn

1468-3288

journal_volume

44

pub_type

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