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Enhanced systemic matrix metalloproteinase response in Helicobacter pylori gastritis

Hilpi I Rautelin1, Aino M Oksanen, Lea I Veijola

  • 1Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki and HUSLAB, Helsinki University Central Hospital Laboratory, Finland. hilpi.rautelin@helsinki.fi

Annals of Medicine
|November 4, 2008
PubMed
Abstract

Insights

Helicobacter pylori infection elevates specific matrix metalloproteinases (MMPs) and neutrophil degranulation products in the blood. This systemic response in H. pylori gastritis may indicate increased proteolysis and oxidative stress, potentially linking to other health issues.

Area of Science:

  • Gastroenterology
  • Immunology
  • Biochemistry

Background:

  • Helicobacter pylori infection is a primary cause of chronic gastritis, peptic ulcers, and gastric cancer.
  • H. pylori upregulates matrix metalloproteinases (MMPs) in gastric mucosa.
  • MMPs are enzymes that break down extracellular matrix, regulated by tissue inhibitors of metalloproteinases (TIMPs).

Purpose of the Study:

  • To investigate if H. pylori gastritis triggers a systemic increase in MMP levels.
  • To determine if H. pylori infection affects circulating MMPs and related markers.

Main Methods:

  • Serum samples were collected from 26 patients with H. pylori gastritis and 18 H. pylori-negative controls.
  • Enzyme-linked immunosorbent assay (ELISA) was used to measure serum levels of various MMPs and TIMP-1.
  • Levels of collagenase-2 (MMP-8), gelatinase B (MMP-9), neutrophil elastase (NE), myeloperoxidase (MPO), gelatinase A (MMP-2), and matrilysin-1 (MMP-7) were analyzed.

Main Results:

  • Patients with H. pylori gastritis showed significantly higher serum levels of MMP-8, MMP-9, NE, and MPO compared to controls.
  • Reduced serum levels of MMP-2 and TIMP-1 were observed in H. pylori-positive patients.
  • Serum levels of MMP-7 did not differ significantly between the groups.

Conclusions:

  • This study demonstrates an enhanced MMP-8 response in H. pylori infection, alongside other neutrophil degranulation products (MMP-9, MPO, NE).
  • Elevated circulating neutrophil degranulation products suggest accelerated proteolysis and oxidative stress in H. pylori-positive individuals.
  • These systemic changes may contribute to extraintestinal complications, including cardiovascular diseases.

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