How the Immune System Responds to Allergy Immunotherapy

Area of Science:

• Immunology
• Allergy Research
• Immunotherapy

Background:

• IgE-mediated diseases significantly impact patient quality of life.
• Allergy immunotherapy (AIT) is the established management for these conditions.
• AIT's effects on immune responses require detailed examination.

Purpose of the Study:

• To review and discuss how AIT influences innate and adaptive immune responses.
• To propose a five-phase model of immune alterations induced by AIT.
• To explore biomarkers for monitoring AIT efficacy and understanding treatment failure.

Main Methods:

• Comprehensive review of existing literature on AIT and immune responses.
• Hypothesizing a five-phase model of immune system changes during AIT.
• Discussion of cellular and molecular mechanisms involved in AIT response.

Main Results:

• AIT induces sequential immune shifts, including desensitization, type 1 response promotion, regulatory cell expansion, and T-cell tolerance.
• Key mediators like IFN-γ, IL-12, IL-27, and IL-10 play critical roles in these phases.
• Different AIT administration methods show similar immune modulation patterns.
• Biomarkers can monitor AIT efficacy across its phases.

Conclusions:

• AIT reshapes immune responses through distinct, timed phases, ultimately promoting tolerance.
• Understanding these phases and associated biomarkers is crucial for developing improved AIT strategies.
• Knowledge of AIT-induced immune plasticity can help identify causes of treatment failure and optimize patient outcomes.