Molecular diagnosis for allergen immunotherapy.

Area of Science:

• Allergy and Immunology
• Molecular Medicine
• Epidemiology

Background:

• Atopic sensitization involves a sequential IgE response to specific allergen molecules, known as molecular spreading.
• Sensitization profiles vary (monomolecular to polymolecular) based on individual factors and exposure, leading to diverse IgE sensitization patterns.
• Broader IgE molecular sensitization in allergic rhinitis correlates with increased risk of asthma and other allergic conditions.

Purpose of the Study:

• To explore the significance of IgE molecular sensitization profiles in predicting allergic disease progression and comorbidities.
• To highlight the role of molecular diagnostics in guiding allergen immunotherapy and identifying patients for specific treatments.
• To advocate for precision allergology and cost-effective implementation of molecular IgE testing.

Main Methods:

• Analysis of IgE responses to distinct allergen molecules in birth cohort studies.
• Utilizing diagnostic algorithms with singleplex or multiplex molecular IgE tests.
• Employing allergen microarray or macroarray procedures for identifying poly-sensitization.

Main Results:

• Demonstrated heterogeneity in IgE sensitization profiles due to molecular spreading.
• Established a link between the breadth of IgE molecular sensitization and the risk of asthma and comorbidities.
• Identified extreme molecular poly-sensitization as a marker for increased risk and potential benefit from anti-IgE therapy.

Conclusions:

• IgE molecular testing enables precise diagnosis and personalized allergy management.
• Molecular diagnostics are crucial for differentiating true sensitization from cross-reactivity and optimizing immunotherapy.
• Precision allergology, guided by molecular IgE insights, offers a pathway to improved management of allergic diseases.