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  • Title: Modulation of mucosal/systemic antibody response after sublingual immunotherapy in mite-allergic children.
    Author: Queirós MG, Silva DA, Siman IL, Ynoue LH, Araújo NS, Pereira FL, Almeida KC, Miranda JS, Pena JD, Cunha-Junior JP, Taketomi EA.
    Journal: Pediatr Allergy Immunol; 2013 Dec; 24(8):752-61. PubMed ID: 24299565.
    Abstract:
    BACKGROUND: There have been no data on sublingual immunotherapy (SLIT) in Brazilian patients sensitized to house dust mites. This study aimed to evaluate the mucosal/systemic antibody response changes and clinical efficacy after SLIT using Dermatophagoides pteronyssinus (Dpt) allergens with or without bacterial extracts in mite-allergic Brazilian children. METHODS: Patients with allergic rhinitis and asthma were selected for a double-blind, placebo-controlled trial randomized to three groups: DPT (Dpt extract, n = 34), DPT+MRB (Dpt plus mixed respiratory bacterial extracts, n = 36), and Placebo (n = 32). Total symptom and medication scores for rhinitis/asthma, skin prick test (SPT) to Dpt, and measurements of Dpt-, Der p 1-, Der p 2-specific serum IgE, IgG4, IgG1, and specific salivary IgA were evaluated at baseline and after 12 and 18 months of treatment. RESULTS: A significant long-term decline in total symptom/medication scores was observed only in active groups (DTP and DPT+MRB). There was no significant change in SPT results in all groups. SLIT using Dpt allergen alone induced increased levels of serum IgG4 to Dpt, Der p 1, and Der p 2, serum IgG1 and salivary IgA to Dpt and Der p 1. SLIT with Dpt plus bacterial extracts was able to decrease IgE levels, particularly to Der p 2, to increase salivary IgA levels to Der p 1, but had no changes on specific IgG4 and IgG1 levels. CONCLUSIONS: All children undergoing SLIT showed clinical improvement, but a long-term reduction in symptom/medication scores with modulation of mucosal/systemic antibody responses were seen only in active groups (DPT and DPT+MRB).
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