Immunological Parameters in the Immunotherapy Follow-Up.

Area of Science:

• Allergy and Immunology
• Immunotherapy Research
• Clinical Trials

Background:

• Allergen-specific immunotherapy (AIT) is a treatment for allergic diseases.
• Immunoglobulin G4 (IgG4) plays a role in the immune response to allergens.
• Understanding IgG4 dynamics during AIT is crucial for treatment optimization.

Purpose of the Study:

• To evaluate the impact of AIT on antigen-specific IgG4 levels.
• To investigate the relationship between IgG4 levels, treatment duration, and clinical outcomes in allergic patients.

Main Methods:

• Study included 35 asthmatic patients sensitized to Dermatophagoides pteronyssinus.
• Study included 226 pollinic patients sensitized to Phleum pratense, with and without AIT.
• Antigen-specific IgG4 levels were measured and correlated with clinical recovery.

Main Results:

• Patients receiving AIT showed a 206.5% increase in IgG4 levels compared to untreated patients (p <0.01).
• The longest immunotherapy duration (2 years) was associated with the highest IgG4 levels.
• A significant positive correlation (p <0.05) was found between specific IgG4 and clinical recovery in pollinic patients.

Conclusions:

• AIT effectively elevates antigen-specific IgG4 levels in allergic patients.
• Sustained AIT duration is linked to higher IgG4 concentrations.
• Increased IgG4 levels are associated with improved clinical outcomes in immunotherapy for pollen allergy.