Leukocyte Adherence Inhibition Test to the assessment of Immunoreactivity Against Cow’s Milk Proteins in Non—IgE-Mediated Gastrointestinal Food Allergy
C. Olivier, D. G. Pinto, A. P. M. Teixeira, Jhéssica L. S. Santana, R. A. P. G. Santos, R. P. S. Lima
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引用次数: 1
Abstract
Background: The non—IgE-mediated food allergy syndromes are a group of conditions diagnosed mostly by clinical criteria and Oral Food Challenge tests (OFC).
Objective: To evaluate the feasibility of the Leukocyte Adherence Inhibition Test (LAIT) to discriminate antigen-specific immunoreactivity in a group of patients with non—IgE-mediated cow’s milk allergy diagnosed by OFC and clinical criteria.
Methods: Ex vivo challenge tests performed with cow’s milk proteins extracts were monitored by LAIT in two groups: A) the active group consisting of 38 patients presenting non—IgE-mediated gastrointestinal lactose-free cow’s milk hypersensitivity; B) the control group consisting of 29 cow’s milk tolerant individuals
Results: The mean Leukocyte Adherence Inhibition (LAI) of the control group was 5.48%, and the mean LAI of the active group was 54.18%. The non-parametric Wilcoxon-Mann-Whitney U test showed p < α = 0.05.
Conclusion: The Leukocyte Adherence Inhibition Test is an ex vivo immunoassay able to predict individual non—IgE-mediated immunoreactivity against cow’s milk allergens and to act as a triage test to select food allergens to be prescribed in exclusion diets to perform OFC in patients with suspected non—IgE-mediated food allergies.