title: Healing of active, non-atrophic autoimmune gastritis by H. pylori eradication.
abstract: OBJECTIVE
  The antigastric antibodies present in Helicobacter pylori infection act as a marker for an ongoing antigastric autoimmune process in the gastric mucosa, which can already be diagnosed in the non-atrophic stage. In a retrospective, uncontrolled study, therefore, we investigated the question as to whether this type of gastritis can be healed by the eradication of H. pylori.
  
  
  METHODS
  In 80 patients with an active, not yet atrophic autoimmune gastritis, we analysed a maximum of four investigations per patient over a period of up to 39.5 months. The following parameters were graded in the antral and corpus mucosa prior to and after H. pylori eradication treatment: grade and activity of the gastritis, H. pylori colonization, atrophy, parietal cell hypertrophy, and incidence of intestinal metaplasia. In addition, the typical parameters for this type of gastritis, such as grade of the periglandular lymphocytic infiltration, grade of glandular destruction and incidence of nodular ECL cell proliferates in the corpus mucosa were determined.
  
  
  RESULTS
  In 64 patients (80%), H. pylori eradication treatment was followed by healing of the active autoimmune corpus gastritis, that is, the activity of the gastritis disappeared, and lymphocytic infiltration of the glands, glandular destruction and parietal cell hypertrophy was found to be significantly reduced.
  
  
  CONCLUSIONS
  Our uncontrolled, retrospective study confirms the existence of an active, not yet atrophic autoimmune gastritis as a sequela of H. pylori infection.
authors.affiliation: Institute for Pathology, Klinikum Bayreuth, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Müller
authors.forename: S
authors.initials: S
authors.lastname: Rappel
authors.forename: T
authors.initials: T
authors.lastname: Wündisch
authors.forename: E
authors.initials: E
authors.lastname: Bayerdörffer
authors.forename: M
authors.initials: M
authors.lastname: Stolte
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000658:Amoxicillin / Q000627:therapeutic use; D000897:Anti-Ulcer Agents / Q000627:therapeutic use*; D001327:Autoimmune Diseases / Q000188:drug therapy* / Q000382:microbiology; D017291:Clarithromycin / Q000627:therapeutic use; D004359:Drug Therapy, Combination / Q000627:therapeutic use; D005260:Female; D005753:Gastric Mucosa / Q000187:drug effects; D005756:Gastritis / Q000188:drug therapy* / Q000382:microbiology; D016481:Helicobacter Infections / Q000188:drug therapy* / Q000382:microbiology; D016480:Helicobacter pylori / Q000187:drug effects* / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008795:Metronidazole / Q000627:therapeutic use; D008875:Middle Aged; D054328:Proton Pump Inhibitors; D012189:Retrospective Studies; D016896:Treatment Outcome; D014945:Wound Healing
chemical_list: D000897:Anti-Ulcer Agents; D054328:Proton Pump Inhibitors; D008795:Metronidazole; D000658:Amoxicillin; D017291:Clarithromycin