title: The association between antral G and D cells and mucosal inflammation, atrophy, and Helicobacter pylori infection in subjects with normal mucosa, chronic gastritis, and duodenal ulcer.
abstract: OBJECTIVE
  The aim of this study was to clarify the mechanism of inappropriate hypergastrinemia in Helicobacter pylori (H. pylori)-infected subjects.
  
  
  METHODS
  We measured fasting serum gastrin (SG) concentrations, and investigated immunohistochemically G and D cell numbers in 47 subjects with normal mucosa, 24 subjects with chronic gastritis, and 24 subjects with duodenal ulcer (DU). The degree of inflammation and atrophy were classified into four categories based on criteria established in the Sydney System: none, mild, moderate, and severe. Avidin-biotin complex methods were used to identify G and D cells, which were counted per unit square (0.25 mm2) in five random fields from each of two well-oriented antral and fundic biopsies. SG concentrations were measured by radioimmunoassay.
  
  
  RESULTS
  The G cell number was not significantly different between 24 subjects with H. pylori-associated gastritis and those with DU. However, the number of antral D cells was significantly lower and the G/D cell ratio was significantly higher in subjects with DU than in those with H. pylori-associated gastritis (p < 0.01), although the degree of inflammation and atrophy in the antrum and H. pylori status were similar between the two groups. The mean fasting SG concentration was higher in subjects with DU than in those with H. pylori-associated gastritis, but the difference was not statistically significant.
  
  
  CONCLUSIONS
  Our results demonstrate that a marked decrease in antral D cell number with a high G/D cell ratio may contribute to hypergastrinemia and the pathogenesis of DU.
authors.affiliation: The First Department of Internal Medicine, Hiroshima University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kamada
authors.forename: K
authors.initials: K
authors.lastname: Haruma
authors.forename: H
authors.initials: H
authors.lastname: Kawaguchi
authors.forename: M
authors.initials: M
authors.lastname: Yoshihara
authors.forename: K
authors.initials: K
authors.lastname: Sumii
authors.forename: G
authors.initials: G
authors.lastname: Kajiyama
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000032:analysis; D001284:Atrophy / Q000473:pathology; D002452:Cell Count; D002908:Chronic Disease; D004381:Duodenal Ulcer / Q000382:microbiology / Q000473:pathology*; D005260:Female; D005753:Gastric Mucosa / Q000033:anatomy & histology / Q000473:pathology*; D019863:Gastrin-Secreting Cells / Q000473:pathology*; D005755:Gastrins / Q000097:blood; D005756:Gastritis / Q000097:blood / Q000276:immunology / Q000382:microbiology / Q000473:pathology*; D016481:Helicobacter Infections / Q000097:blood / Q000276:immunology / Q000473:pathology*; D016480:Helicobacter pylori / Q000276:immunology; D006801:Humans; D007150:Immunohistochemistry; D007249:Inflammation / Q000473:pathology; D008297:Male; D019864:Somatostatin-Secreting Cells / Q000473:pathology*
chemical_list: D000907:Antibodies, Bacterial; D005755:Gastrins