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Interplay between Helicobacter pylori and immune cells in immune pathogenesis of gastric inflammation and mucosal pathology

Cellular & Molecular Immunology volume 7, pages 255–259 (2010)Cite this article

Abstract

Helicobacter pylori infection is associated with an inflammatory response in the gastric mucosa, leading to chronic gastritis, peptic ulcers, gastric carcinoma and gastric mucosa-associated lymphoid tissue (MALT) lymphomas. Recent studies have shown that apoptosis of gastric epithelial cells is increased during H. pylori infection. Apoptosis induced by microbial infections are factors implicated in the pathogenesis of H. pylori infection. The enhanced gastric epithelial cell apoptosis in H. pylori infection has been suggested to play an important role in the pathogenesis of chronic gastritis and gastric pathology. In addition to directly triggering apoptosis, H. pylori induces sensitivity to tumor-necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL)-mediated apoptosis in gastric epithelial cells via modulation of TRAIL apoptosis signaling. Moreover, H. pylori infection induces infiltration of T lymphocytes and triggers inflammation to augment apoptosis. In H. pylori infection, there was significantly increased CCR6+CD3+T-cell infiltration in the gastric mucosa, and the CCR6 ligand, CCL20 chemokine, was selectively expressed in inflamed gastric tissues. These results implicate that the interaction between CCL20 and CCR6 may play a role in recruiting T cells to the sites of inflammation in the gastric mucosa during Helicobacter infection. Through these mechanisms, chemokine-mediated T lymphocyte trafficking into inflamed epithelium is initiated and the mucosal injury in Helicobacter infection is induced. This article will review the recent novel findings on the interactions of H. pylori with diverse host epithelial signaling pathways and events involved in the initiation of gastric pathology, including gastric inflammation, mucosal damage and development of MALT lymphomas.

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Acknowledgements

This work was supported by grants from the National Health Research Institute (NHRI-EX95-9532SI), National Science Council, Taiwan (NSC90-2314B-075B003 and NSC91-2320B-002) and China Medical University (CMU96-266, CMU97-299).

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  1. Department of Internal Medicine, Taipei Medical University Shuang Ho Hospital, Taipei, Taiwan

    Hwei-Fang Tsai

  2. Gradute Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

    Hwei-Fang Tsai

  3. Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, Taiwan

    Ping-Ning Hsu

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Tsai, HF., Hsu, PN. Interplay between Helicobacter pylori and immune cells in immune pathogenesis of gastric inflammation and mucosal pathology. Cell Mol Immunol 7, 255–259 (2010). https://doi.org/10.1038/cmi.2010.2

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