Does Helicobacter pylori affect gastric mucin expression? Relationship between gastric antral mucin expression and H. pylori colonization

Sara Morgenstern, Rivka Koren, Steven F. Moss, Gerald Fraser, Eli Okon, Yaron Niv*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background/objective Helicobacter pylori colonizes the gastric mucous gel layer, the surface epithelium and glands. It has been shown that H. pylori infection causes aberrant expression of gastric mucins MUC 5 and MUC 6. This study aimed to determine the distribution of MUC 5 and MUC 6 in the gastric antrum of dyspeptic patients, and to investigate changes in this pattern in the presence of H. pylori and after successful eradication. Materials and methods Gastric antrum biopsy specimens were examined by immunohistochemistry for mucin gene (MUC 5 and MUC 6) expression. Polyclonal antibodies were used to detect amino acid tandem repeats of each protein. A scoring system (0-3) was used to assess staining intensity at three sites: foveola, mucous neck cells and glands. H. pylori status was determined by histology and rapid urease test, and considered positive or negative when both tests were positive or negative, respectively. The study included 49 patients positive for H. pylori, in 36 of whom successful eradication was performed, and 11 H. pylori-negative patients. Results There was a gradient of MUC 5 expression, higher to lower, from the surface to the glands, which was more pronounced before eradication. Increased MUC 5 synthesis in the mucous neck cells and in the glands was found after H. pylori eradication (P = 0.016). MUC 6 was synthesized in the glands more than in the mucous neck cells or foveola. MUC 6 was also secreted into the lumen and probably comprised the superficial part of the unstirred mucous layer. Conclusion The change in MUC 5 synthesis may reflect H. pylori colonization.

Original languageEnglish
Pages (from-to)19-23
Number of pages5
JournalEuropean Journal of Gastroenterology and Hepatology
Volume13
Issue number1
DOIs
StatePublished - 2001

Keywords

  • Helicobacter pylori
  • MUC 5
  • MUC 6
  • Mucin
  • Stomach

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