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Inhibitory effect of polaprezinc on the inflammatory response to Helicobacter pylori

Osamu Handa1, Norimasa Yoshida, Yukiko Tanaka

  • 1Department of Intrernal Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Canadian Journal of Gastroenterology = Journal Canadien De Gastroenterologie
|December 5, 2002
PubMed

Insights

Polaprezinc, a zinc compound, effectively reduces Helicobacter pylori-induced gastric inflammation by inhibiting polymorphonuclear leukocyte (PMN) infiltration and interleukin-8 (IL-8) production. This suggests a therapeutic role for polaprezinc in managing H. pylori-related gastrointestinal issues.

Area of Science:

  • Gastroenterology
  • Immunology
  • Pharmacology

Background:

  • Helicobacter pylori infection commonly causes gastrointestinal mucosal inflammation.
  • Polymorphonuclear leukocytes (PMN) and monocytes infiltrate the gastric mucosa during H. pylori infection, contributing to inflammation.
  • Polaprezinc is a chelate compound of zinc and L-carnosine with potential anti-inflammatory properties.

Purpose of the Study:

  • To investigate the efficacy of polaprezinc against H. pylori-induced inflammation.
  • To examine the effects of polaprezinc on interleukin-8 (IL-8) production by gastric cells.
  • To assess the impact of polaprezinc on PMN-endothelial cell adhesive interactions.

Main Methods:

  • In vitro study using a gastric cancer cell line (MKN 45 cells) and PMN.
  • Stimulation of cells with H. pylori water extract (HPE).
  • Measurement of IL-8 production and expression of CD11b/CD18 on PMN; assessment of PMN-endothelial cell adhesion.

Main Results:

  • Polaprezinc and zinc sulfate dose-dependently inhibited IL-8 production by MKN 45 cells stimulated with HPE.
  • Polaprezinc and zinc sulfate inhibited the expression of CD11b/CD18 on PMN and PMN-endothelial cell adhesion.
  • L-carnosine alone showed no significant effects on IL-8 production or PMN-endothelial cell interactions.

Conclusions:

  • The zinc component of polaprezinc appears to be primarily responsible for its anti-inflammatory effects.
  • Polaprezinc may inhibit H. pylori-induced gastric inflammation by reducing PMN infiltration and IL-8 production.
  • Polaprezinc demonstrates potential as a therapeutic agent for H. pylori-related gastrointestinal inflammation.

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