title: Changes in Helicobacter pylori-induced gastritis in the antrum and corpus during 12 months of treatment with omeprazole and lansoprazole in patients with gastro-oesophageal reflux disease.
abstract: BACKGROUND
  Several studies have shown that treatment with omeprazole leads to aggravation of Helicobacter pylori gastritis in the corpus. Whether this also applies to lansoprazole, and whether, in comparison with omeprazole, there are differences in therapy-induced gastritis parameter changes remains unclear.
  
  
  METHODS
  In 111 patients infected with H. pylori and with gastro-oesophageal reflux disease we investigated the gastritis parameters in antral and corpus mucosa before and after 2, 6 and 12 months of treatment with 15 or 30 mg lansoprazole or 20 mg omeprazole/day.
  
  
  RESULTS
  In all groups the different treatments had a similar effect: in both regions of the stomach, suppression or partial elimination of H. pylori was seen. However, improvement in the inflammation was observed only in the antrum, while in the corpus most gastritis parameters worsened significantly. There was no increase in intestinal metaplasia or atrophy.
  
  
  CONCLUSIONS
  In common with omeprazole, lansoprazole aggravates the gastritis parameters in the corpus but improves them in the antrum. Treatment with proton pump inhibitors does not result in any increase in the incidence of atrophy/intestinal metaplasia. However, as gastritis predominating in the corpus seems to be associated with an elevated carcinogenic risk, consideration should be given to prophylactic H. pylori eradication therapy before initiating proton pump inhibitor treatment.
authors.affiliation: Institut für Pathologie, Klinikum Bayreuth, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Stolte
authors.forename: A
authors.initials: A
authors.lastname: Meining
authors.forename: J M
authors.initials: JM
authors.lastname: Schmitz
authors.forename: T
authors.initials: T
authors.lastname: Alexandridis
authors.forename: E
authors.initials: E
authors.lastname: Seifert
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D005756:Gastritis / Q000188:drug therapy* / Q000209:etiology / Q000382:microbiology; D005764:Gastroesophageal Reflux / Q000150:complications* / Q000473:pathology; D016481:Helicobacter Infections; D016480:Helicobacter pylori / Q000187:drug effects*; D006801:Humans; D064747:Lansoprazole; D008297:Male; D009853:Omeprazole / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000627:therapeutic use; D011706:Pyloric Antrum / Q000187:drug effects* / Q000382:microbiology; D012720:Severity of Illness Index; D013270:Stomach / Q000187:drug effects* / Q000382:microbiology; D013997:Time Factors
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents; D064747:Lansoprazole; D009853:Omeprazole