Dust Mite Serodominance Profiles in Lugo

Area of Science:

• Allergen immunotherapy
• Immunology
• Respiratory medicine

Background:

• House dust mite allergy affects a significant portion of the global population, potentially leading to severe conditions like asthma and atopic dermatitis.
• Understanding specific allergen sensitization is crucial for effective management and treatment strategies.

Purpose of the Study:

• To investigate the prevalence of sensitization to specific Dermatophagoides pteronyssinus molecules in patients with allergic rhinitis.
• To explore the correlation between sensitization profiles and the presence or absence of asthma.

Main Methods:

• Recruitment of 50 patients diagnosed with allergic rhinitis/rhino conjunctivitis.
• Performance of Mite Skin Prick Tests and testing for mite-specific IgE levels.
• Analysis of patient sensitization to individual mite molecules (Der p1, Der p2, Der p23) and their combinations.

Main Results:

• High rates of positive skin prick tests for various mite allergens were observed (e.g., Dpt 96%, Dfar 94%).
• Der p2 showed the highest serodominance (30.2 kU/L), with Der p23 sensitization found in 72% of patients.
• All patients with asthma were sensitized to Der p2, while sensitization to Der p23 was significantly lower (50%) in non-asthmatic patients.

Conclusions:

• A high percentage of patients (90%) recognize Der p1, Der p2, and Der p23, individually or in combination.
• Der p23 sensitization is highly prevalent (72%) and its presence is notably reduced in non-asthmatic individuals.
• Sensitivity to Der p2 is universal among asthmatic patients in this cohort, underscoring its importance in allergic asthma.