Differences in Molecular Sensitization Profiles Between Spanish and Latin American Mite-Allergic Patients

Area of Science:

• Allergen immunotherapy
• Molecular allergology
• Clinical immunology

Background:

• Investigated sensitization patterns to Dermatophagoides pteronyssinus in allergic patients across two continents.
• Focused on the link between diagnostic markers and clinical severity in allergic rhinitis and asthma.

Purpose of the Study:

• To analyze Dermatophagoides pteronyssinus sensitization.
• To explore associations between diagnostic findings and clinical severity.
• To compare sensitization profiles between Latin American and Spanish populations.

Main Methods:

• Recruited 218 allergic patients with positive skin prick tests to D. pteronyssinus.
• Quantified specific IgE levels to D. pteronyssinus and its components (Der p 1, Der p 2, Der p 23) using ImmunoCAP.
• Determined allergenic profiles via Western blotting and performed statistical analysis.

Main Results:

• Der p 2 was the most recognized allergen (79%), followed by Der p 1 (73%) and Der p 23 (69%).
• Asthma prevalence increased with sensitization number, though not statistically significant.
• Spanish patients showed higher sensitization to Der p 2 and Der p 1, while Latin American patients were more sensitized to Der p 23.

Conclusions:

• Der p 2 is confirmed as a major allergen in house dust mite allergy, significantly contributing to asthma development.
• Der p 23 sensitization is more prevalent in Latin American populations.
• Understanding regional sensitization patterns is crucial for targeted allergy management.