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Updated: Aug 26, 2026

One-step Negative Chromatographic Purification of Helicobacter pylori Neutrophil-activating Protein Overexpressed in Escherichia coli in Batch Mode
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One-step Negative Chromatographic Purification of Helicobacter pylori Neutrophil-activating Protein Overexpressed in Escherichia coli in Batch Mode

Published on: June 18, 2016

Platelet-activating factor mediates Helicobacter pylori lipopolysaccharide interference with gastric mucin synthesis

Bronislaw L Slomiany1, Amalia Slomiany

  • 1Research Center, University of Medicine and Dentistry of New Jersey Dental School, Newark 07103-2400, USA. slomiabr@umdnj.edu

IUBMB Life
|March 3, 2004
PubMed

Insights

Platelet-activating factor (PAF) significantly impacts gastric mucin synthesis during H. pylori infections. BN52020, a PAF antagonist, protects mucin production by interfering with PI3K-dependent signaling pathways.

Area of Science:

  • Gastroenterology
  • Cell Biology
  • Immunology

Background:

  • Platelet-activating factor (PAF) is a key mediator in bacterial infections.
  • H. pylori infection negatively affects gastric mucosal cells, including mucin synthesis.

Purpose of the Study:

  • To investigate the role of PAF in H. pylori-induced changes in gastric mucin synthesis.
  • To elucidate the signaling pathways involved in PAF's effects on gastric mucosal cells.

Main Methods:

  • Utilized a specific PAF antagonist (BN52020) to study its effects on H. pylori LPS-induced mucin synthesis reduction.
  • Employed inhibitors of phosphatidylinositol 3-kinase (wortmannin) and nitric oxide synthase (L-NNA, 1400W) to dissect signaling pathways.
  • Assessed apoptosis, TNF-alpha, and NO generation.

Main Results:

  • BN52020 impeded the reduction in mucin synthesis caused by H. pylori LPS.
  • Wortmannin blocked BN52020's protective effect and its impact on apoptosis, TNF-alpha, and NO.
  • NOS inhibitors differentially modulated BN52020's effect, with L-NNA reducing impedance and 1400W potentiating it.
  • Interactions between wortmannin and NOS inhibitors revealed complex signaling crosstalk.

Conclusions:

  • PAF plays a critical role in the pathological consequences of H. pylori infection on gastric mucin synthesis.
  • PAF influences mucin synthesis via interference with PI3K-dependent cNOS activation.
  • These findings highlight potential therapeutic targets for H. pylori-associated gastric pathology.

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