title: Studies on the interrelation between Zollinger-Ellison syndrome, Helicobacter pylori, and proton pump inhibitor therapy.
abstract: OBJECTIVE
  The interrelation between Helicobacter pylori infection and proton pump inhibitor therapy in patients with Zollinger-Ellison syndrome is unknown. The aim of this study was to evaluate the influence of these factors on parameters of Zollinger-Ellison syndrome.
  
  
  METHODS
  Prevalence of H. pylori was determined by biopsy and antibody testing in 84 patients. The influence of H. pylori status on clinical and laboratory parameters of Zollinger-Ellison syndrome was evaluated. Seroconversion after surgery was assessed retrospectively in infected patients.
  
  
  RESULTS
  The prevalence of H. pylori exposure was 23% (10% with active infection). Acid output was higher in H. pylori-negative patients, but other clinical and biochemical parameters did not differ. Parameters were also similar for patients determined to be H. pylori positive by histology or antibody testing alone. Seroconversion rates did not differ between those rendered or not rendered disease free despite a significant reduction in acid output.
  
  
  CONCLUSIONS
  H. pylori infection is not a risk factor for peptic ulceration in patients with Zollinger-Ellison syndrome. The prevalence is lower than in the general population and much lower than for patients with idiopathic peptic ulcer disease. Long-term omeprazole therapy in H. pylori-positive patients with Zollinger-Ellison syndrome may-lead to a reduction in parietal cell mass.
authors.affiliation: Digestive Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA.
authors.forename: H C
authors.initials: HC
authors.lastname: Weber
authors.forename: D J
authors.initials: DJ
authors.lastname: Venzon
authors.forename: R T
authors.initials: RT
authors.lastname: Jensen
authors.forename: D C
authors.initials: DC
authors.lastname: Metz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000897:Anti-Ulcer Agents / Q000627:therapeutic use*; D015331:Cohort Studies; D005260:Female; D005744:Gastric Acid / Q000378:metabolism*; D005745:Gastric Acidity Determination; D016481:Helicobacter Infections / Q000150:complications* / Q000517:prevention & control; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000627:therapeutic use; D015043:Zollinger-Ellison Syndrome / Q000150:complications* / Q000188:drug therapy* / Q000382:microbiology / Q000601:surgery
chemical_list: D000897:Anti-Ulcer Agents; D009853:Omeprazole