Characterisation of immune mediator release during the immediate response to segmental mucosal challenge in the jejunum of patients with food allergy

J. Santos, C. Bayarri, E. Saperas, C. Noguciras, M. Antolín, M. Mourelle, A. Cadahia, J. R. Malagelada

Research output: Contribution to journalArticleResearchpeer-review

51 Citations (Scopus)

Abstract

Background - Food allergy is a common complaint among patients with a broad spectrum of abdominal and extraabdominal symptoms that must be distinguished from other more common non-immunological food intolerances. Aims - To investigate whether human intestinal hypersensitivity reactions are associated with detectable release of inflammatory mediators from activated cells, which may serve as a biological marker of true allergic reactions. Patients/Methods - In eight patients with food allergy and seven healthy volunteers, a closed-segment perfusion technique was used to investigate the effects of jejunal food challenge on luminal release of tryptase, histamine, prostaglandin D2, eosinophil cationic protein, peroxidase activity, and water flux. Results - Intraluminal administration of food antigens induced a rapid increase in intestinal release of tryptase, histamine, prostaglandin D2, and peroxidase activity (p<0.05 v basal period) but not eosinophil cationic protein. The increased release of these mediators was associated with a notable water secretory response. Conclusions - These results suggest that human intestinal hypersensitivity reactions are characterised by prompt activation of mast cells and other immune cells, with notable and immediate secretion of water and inflammatory mediators into the intestinal lumen. Analysis of the profile of markers released into the jejunum after food provocation may be useful for the objective diagnosis of food allergy.
Original languageEnglish
Pages (from-to)553-558
JournalGut
Volume45
Issue number4
DOIs
Publication statusPublished - 1 Jan 1999

Keywords

  • Food allergy
  • Intestinal perfusion
  • Mast cells

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