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Immunological Parameters in the Immunotherapy Follow-Up.

Albert Oehling, María L Sanz, Blanca E García

International Archives of Allergy and Immunology

|June 25, 2021

Summary

Immunotherapy significantly increases antigen-specific IgG4 levels in allergic patients. Higher IgG4 concentrations correlate with longer treatment duration and improved clinical recovery in pollen-allergic individuals.

Keywords:

<italic>Dermatophagoides pteronyssinus</italic>IgG4 Immunotherapy Pollinosis

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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.