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Immunomodulation during sublingual therapy in allergic children.
Flora Ippoliti1, Wladimiro De Santis, Anna Volterrani
1Department of Experimental Medicine and Pathology, University 'La Sapienza', Rome, Italy.
Summary
Sublingual immunotherapy (SLIT) effectively reduced asthma and rhinitis symptoms in children. This allergy treatment also decreased specific immune markers like interleukin-13 and prolactin, suggesting a modulated immune response.
Area of Science:
- Immunology
- Allergy Research
- Pediatric Asthma
Background:
- Sublingual immunotherapy (SLIT) is clinically effective for allergies, but its precise mechanisms remain debated.
- Emerging evidence points to Th2 cytokines (IL-4, IL-5, IL-13), co-stimulatory molecules (CD40), hormones, and neuropeptides in immune modulation.
Purpose of the Study:
- To investigate the impact of SLIT on immune responses in children with mild asthma and Dermatophagoides pteronyssinus allergy.
- To evaluate changes in symptom scores, CD40 expression, and serum levels of ECP, IL-13, prolactin (PRL), and ACTH.
Main Methods:
- A double-blind, placebo-controlled study involving 86 children with mild asthma.
- Random assignment to SLIT (n=47) or placebo (n=39) for 6 months.
- Assessment of symptom diaries, CD40 expression on B cells, and serum ECP, IL-13, PRL, and ACTH levels.
Main Results:
- Significant reduction in asthma and rhinitis symptom scores in the SLIT group compared to placebo.
- No significant changes in CD40 or ACTH levels were observed.
- A significant decrease in serum ECP, IL-13, and PRL levels after 6 months of SLIT.
Conclusions:
- SLIT is effective and safe for managing pediatric asthma and allergic rhinitis.
- SLIT appears to modulate Th2 cytokine synthesis, indicated by reduced IL-13 levels.
- Decreased prolactin levels may signify reduced T lymphocyte activation following SLIT.