Related Experiment Videos
Granulocyte activation by Helicobacter pylori
R A Hatz1, G Meimarakis, N Lehn
1Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University Munich.
European Journal of Medical Research
|September 20, 1996
Summary
Helicobacter pylori water-soluble proteins activate neutrophils by increasing their adhesion molecule expression. This promotes granulocyte migration into gastric tissue, contributing to H. pylori-associated gastritis.
Area of Science:
- Gastroenterology
- Immunology
- Microbiology
Background:
- Helicobacter pylori-associated gastritis (HAG) involves immune cell infiltration in the gastric mucosa.
- Neutrophil activation is implicated in HAG pathogenesis, potentially triggered by bacterial components crossing the epithelial barrier.
Purpose of the Study:
- To investigate the impact of H. pylori water-soluble protein (WSP) components on granulocyte adherence and activation.
- To elucidate the role of WSP in neutrophil recruitment and function during H. pylori infection.
Main Methods:
- Assessing the effect of H. pylori WSP on granulocyte surface expression of beta 2-integrin CD11b/CD18.
- Evaluating the adherence of activated granulocytes to human umbilical vein endothelial cells (HUVEC) in vitro.
Main Results:
- H. pylori WSP significantly enhanced the expression of CD11b/CD18 on granulocytes.
- Activated granulocytes exhibited increased adhesion to HUVEC, indicating enhanced transendothelial migration potential.
Conclusions:
- H. pylori WSP directly induces neutrophil activation and enhances their adhesive properties.
- These findings support the hypothesis that H. pylori components facilitate neutrophil migration into gastric mucosa, contributing to HAG.