J Korean Med Sci.  1997 Oct;12(5):421-426. 10.3346/jkms.1997.12.5.421.

Decreased gastric proliferation of foveolar epithelial cells after the eradication of Helicobacter pylori

• Jang TJ
• Lee JI
• Kim JR
• Kim DH
• Bae SH

• KMID: 1081034
• DOI: http://doi.org/10.3346/jkms.1997.12.5.421

Abstract

Increased epithelial cell proliferation is associated with an increased risk of gastric carcinoma. Helicobacter pylori infection is an established risk factor for gastric cancer and the organism has recently been classified as a group I carcinogen by an IARC working group. In this study, we describe differences in gastric epithelial cell proliferation between a H. pylori eradicated group (n = 21) and a not eradicated group (n = 8) after anti-H. pylori eradication therapy to show that increased cell proliferation is associated with H. pylori infection. H. pylori infection was determined by rapid urease test and immunohistochemical method with anti-H. pylori polyclonal antibody. Gastric epithelial cell proliferation was assessed using immunohistochemical method using Ki-67 monoclonal antibody. Ki-67 positive cells in H. pylori associated chronic active gastritis were observed in the glandular neck and the upper portion of foveolar epithelium. Patients who cleared their H. pylori infections showed a significant decrease of Ki-67 labeling index after therapy (0.73 +/- 0.10 vs. 0.48 +/- 0.08, p < 0.01). By contrast, Ki-67 labeling index before and after treatment in patients who remained positive for H. pylori showed no significant difference (0.78 +/- 0.08 vs 0.74 +/- 0.10, p > 0.05). These results indicate that H. pylori infection increases the proliferation of gastric foveolar epithelium, which is reduced by the eradication therapy. We suggest that anti-H. pylori eradication therapy can prevent mucosal cell proliferation to be closely associated with gastric carcinogenesis.

MeSH Terms

Adolescence
Adult
Aged
Aged, 80 and over
Cell Division
Epithelial Cells/cytology
Female
Gastritis/pathology*
Gastritis/microbiology
Gastritis/metabolism
Helicobacter Infections/pathology*
Helicobacter Infections/metabolism
Helicobacter pylori*
Human
Ki-67 Antigen/metabolism
Male
Middle Age
Stomach/pathology
Stomach/metabolism
Stomach/cytology*