The Dermatophagoides pteronyssinus Molecular Sensitization Profile of Allergic Rhinitis Patients in Central China

Area of Science:

• Allergy and Immunology
• Environmental Health
• Molecular Biology

Background:

• House dust mites (HDMs) are primary aeroallergens in China, causing allergic rhinitis (AR) and asthma.
• Regional variations exist in HDM molecular sensitization patterns.
• Understanding these patterns is crucial for accurate diagnosis and targeted treatment.

Purpose of the Study:

• To investigate the Dermatophagoides pteronyssinus (Der p) molecular sensitization profile in allergic rhinitis (AR) patients in Central China.
• To identify key Der p components responsible for sensitization.
• To explore the relationship between sensitization profiles and asthma development.

Main Methods:

• Enrolled AR patients with positive skin prick tests to Der p.
• Measured specific immunoglobulin E (sIgE) levels against Der p, Dermatophagoides farinae (Der f), Acarus siro (Aca s), Blomia tropicalis (Blo t), and Der p components (Der p1, Der p2, Der p10).
• Analyzed correlations between sensitization profiles, asthma status, and specific allergen components.

Main Results:

• High prevalence of sIgE positivity for Der p (99.2%), Der f (98.5%), Aca s (81.5%), and Blo t (83.1%).
• Der p1 (71.5%) and Der p2 (64.6%) were major sensitizing components.
• Asthma patients showed significantly higher sIgE levels to Der p, Der f, Der p1, and Der p2.
• Co-sensitization to both Der p1 and Der p2 was associated with a higher prevalence of asthma (62.8%) compared to single sensitization or no sensitization to these components.

Conclusions:

• Der p exhibits significant cross-reactivity with other mite species.
• Der p1 and Der p2 are the primary drivers of Der p sensitization in Central China's AR patients.
• Co-sensitization to Der p1 and Der p2 may serve as a risk factor for asthma development in HDM-allergic rhinitis patients.