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BACKGROUNDSubcutaneous allergen-specific immunotherapy (IT) is a proved, highly effective treatment for respiratory IgE-mediated diseases. However, few studies have explored the immunological mechanisms of IT in patients with atopic dermatitis.OBJECTIVETo explore the immune response of atopic dermatitis patients receiving house dust mite (HDM) immunotherapy, according to humoral response and basophil activation.MATERIAL AND METHODAn open label study was done which assessed the severity of atopic dermatitis with SCORAD in 20 patients (10 with immunotherapy and 10 without it) every three months during two years. Serum samples were taken before the follow up, and at the first and second year of study to analyze CD63 basophil expression, total IgE levels and specific IgE and IgG4 to Der p and Der f. Ten patients with allergic rhinitis receiving IT and 5 non-allergic subjects were used as controls.RESULTSCD63 expression after basophil stimulation with Der p was higher in atopic dermatitis patients than in rhinitis and non-allergic subjects. After the first and second year of treatment, CD63 expression was lower in atopic dermatitis active group than in the atopic dermatitis control group. We observed a correlation between SCORAD, IgG4 and CD63 expression.CONCLUSIONSIn patients with atopic dermatitis, basophil activation test could be a biomarker of clinical response and basophil modulation can result in a better clinical control.

Efecto de la inmunoterapia en la activación de basófilos inducida por alergenos en pacientes con dermatitis atópica