title: Indications of 'atopic bowel' in patients with self-reported food hypersensitivity.
abstract: BACKGROUND
  An association between atopic disease and gastrointestinal complaints has been suggested.
  
  
  OBJECTIVE
  To explore the association between atopic disease, gastrointestinal symptoms, and possible gastrointestinal manifestations of atopic disease in patients with self-reported food hypersensitivity.
  
  
  METHODS
  Symptoms, skin prick tests, serum markers of allergy and intestinal permeability were recorded in 71 adult patients. Eosinophils, tryptase- and IgE-positive cells were counted in duodenal biopsies.
  
  
  RESULTS
  Sixty-six (93%) patients had irritable bowel syndrome (IBS) and 43 (61%) had atopic disease, predominantly rhinoconjunctivitis. All 43 were sensitized to inhalant allergens, 29 (41%) to food allergens, but food challenges were negative. Serum total IgE and duodenal IgE-positive cell counts were significantly correlated (P < 0.0001) and both were significantly higher in atopic than in non-atopic patients (P < 0.0001 and P = 0.003 respectively). IgE-positive cells appeared to be 'armed' mast cells. Intestinal permeability was significantly elevated in atopic compared with non-atopic patients (P = 0.02). Gastrointestinal symptoms and numbers of tryptase-positive mast cells and eosinophils did not differ between groups.
  
  
  CONCLUSIONS
  Patients with self-reported food hypersensitivity had a high prevalence of IBS and atopic disease. Atopic patients had increased intestinal permeability and density of IgE-bearing cells compared with non-atopic patients, but gastrointestinal symptoms did not differ between groups.
authors.affiliation: Institute of Medicine, University of Bergen, Norway. kristine.lillestol@med.uib.no <kristine.lillestol@med.uib.no>
authors.forename: K
authors.initials: K
authors.lastname: Lillestøl
authors.forename: L
authors.initials: L
authors.lastname: Helgeland
authors.forename: G
authors.initials: G
authors.lastname: Arslan Lied
authors.forename: E
authors.initials: E
authors.lastname: Florvaag
authors.forename: J
authors.initials: J
authors.lastname: Valeur
authors.forename: R
authors.initials: R
authors.lastname: Lind
authors.forename: A
authors.initials: A
authors.lastname: Berstad
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000485:Allergens / Q000276:immunology; D015415:Biomarkers / Q000097:blood; D005260:Female; D005512:Food Hypersensitivity / Q000150:complications / Q000453:epidemiology / Q000473:pathology; D005767:Gastrointestinal Diseases / Q000150:complications* / Q000453:epidemiology / Q000473:pathology; D006801:Humans; D007073:Immunoglobulin E / Q000276:immunology* / Q000378:metabolism; D015212:Inflammatory Bowel Diseases / Q000150:complications* / Q000453:epidemiology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012882:Skin Tests / Q000379:methods; D055815:Young Adult
chemical_list: D000485:Allergens; D015415:Biomarkers; D007073:Immunoglobulin E