Immunological aspects of asthma (prophylaxis).

Area of Science:

• Immunology
• Allergy Research
• Pediatric Allergy

Background:

• Convalescent children exposed to mite allergens can exhibit immediate hypersensitivity reactions.
• Despite high mite-specific IgE, these children are often free from asthma due to reduced mite antigen exposure, indicated by lower mite-specific IgG levels.

Purpose of the Study:

• To investigate the long-term effects of mite allergen exposure in convalescent children.
• To determine if early elimination of food allergens in infancy impacts the development of allergic diathesis.
• To assess the protective effect of early allergen elimination on the progression of the allergic march.

Main Methods:

• Longitudinal follow-up study of children in convalescent stage.
• Prospective study on the effects of early food allergen elimination in infancy.
• Measurement of mite-specific IgE and IgG antibody titers.
• Monitoring of clinical manifestations and allergic diathesis progression.

Main Results:

• Children in convalescent stage retain the capacity for immediate hypersensitivity to mite antigens.
• Reduced mite antigen load, evidenced by lower mite-specific IgG, correlates with the absence of asthmatic attacks.
• Early elimination of food allergens in infancy improved clinical outcomes.
• Early allergen elimination protected against the allergic march, minimizing total IgE and mite-specific IgE production.

Conclusions:

• Convalescent children remain at risk for immediate hypersensitivity to allergens like mites.
• Early intervention by eliminating food allergens in infancy is crucial for preventing allergic diathesis and the allergic march.
• Minimizing allergen exposure early in life can significantly reduce the development of allergic sensitization, including IgE production.