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Helicobacter pylori lipopolysaccharide in the IL-2 milieu activates lymphocytes from dyspeptic children

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Author

  • W Rudnicka
  • A Jarosinska
  • L Bak-Romaniszyn
  • A Moran
  • I Planeta-Malecka
  • Torkel Wadström
  • M Chmiela

Summary, in English

In this study, we assessed the proliferative response of peripheral blood mononuclear leukocytes (PBML) from 33 children/young adolescents with chronic dyspepsia, to H. pylori LPS in the presence and absence of IL-2 as a T cell growth factor. A rapid urease test (RUT) and a presence of Helicobacter-like organisms (HLO) in the biopsy specimens allowed us to distinguish RUT/HLO-positive (17/33) and -negative (16/33) patients. H. pylori LPS alone induced a proliferation of PBML from 4 out of 33 dyspeptic patients. IL-2 increased the prevalence of the response to LPS to 59% and 74% of RUT/HLO-positive and -negative patients, respectively. PBML from RUT/HLO-positive patients responded significantly less intensively to H. pylori LPS in the presence of IL-2, to IL-2 alone and to H. pylori LPS+IL-2. However, there was no difference in PHA-driven proliferation of PBML from the patients of those two groups. A negative correlation between the responsiveness to H. pylori LPS of PBML and occurrence of type B inflammation in gastric mucosa was demonstrated. The results suggest a contribution of H. pylori LPS to an outcome of H. pylori infection. It is speculated that H. pylori LPS by an activation of immunocompetent cells may reduce gastric inflammation, decrease bacterial load and prolong H. pylori infection. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

Publishing year

2003

Language

English

Pages

141-145

Publication/Series

FEMS Immunology and Medical Microbiology (Helicobacter Pathogenesis and Immunology. Selected papers)

Volume

36

Issue

3

Document type

Conference paper

Publisher

Elsevier

Topic

  • Microbiology in the medical area

Keywords

  • LPS
  • IL-2
  • Helicobacter pylori
  • inflammation
  • cell proliferation

Conference name

5th International Workshop on Pathogenesis and Host Response in Helicobacter Infections

Conference date

0001-01-02

Status

Published

ISBN/ISSN/Other

  • ISSN: 0928-8244
  • ISSN: 2049-632X