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Laura Perezábad,Marta Reche,Teresa Valbuena,Rosina López-Fandiño,Elena Molina,Iván López-Expósito 대한천식알레르기학회 2017 Allergy, Asthma & Immunology Research Vol.9 No.1
Purpose: This study aimed to evaluate the safety and efficacy to induce clinical desensitization to cow’s milk (CM) of an oral immunotherapy (OIT) protocol in a pediatric population with cow’s milk allergy (CMA). In addition, the immune responses against β-casein, of peripheral blood mononuclear cells (PBMCs) from CMA patients, before and after the protocol were evaluated and compared to a nonallergic population. Methods: A group of 20 children with IgE-mediated CMA and 15 nonallergic children were recruited. Allergic subjects underwent an OIT protocol based on weekly doses of commercial semi-skimmed ultra-high temperature treated (UHT) CM, followed by a maintenance phase. Immune profiles and changes in all subjects were investigated by measuring Th1, Th2, and Treg cytokines, transcription factors, and specific IgE and IgG4 levels. Results: The CMOIT protocol enabled to desensitize 70% of the allergic patients. Successful OIT was accompanied by significant increases in casein-specific IgG4 levels, together with a reduction in the concentration of antigen-specific IgE and in IL-5, IL-13, and IL-10 production by β-casein-stimulated PBMCs. Baseline significant differences observed between allergic and nonallergic children in IL-13 and IL-5 levels were no longer found once the protocol had finished. Conclusions: The OIT protocol was safe and effective in inducing milk desensitization in 70% of the children with CMA, leading to alterations in their immune profiles toward a nonallergic phenotype.