Cellular Mechanism and Key Insights in Allergen Immunotherapy for Allergic Rhinitis

Area of Science:

• Immunology and Allergy Research
• Clinical Immunology
• Respiratory Medicine

Background:

• Allergic rhinitis (AR) is a widespread chronic condition impacting quality of life and exacerbating asthma.
• Current AR management includes avoidance, pharmacotherapy, and allergen-specific immunotherapy (AIT).
• AIT is the only curative treatment, targeting the immune response to allergens for long-term relief.

Purpose of the Study:

• To review the fundamental principles and effectiveness of AIT in managing AR.
• To present novel insights into immune cell involvement in AIT for AR.
• To highlight recent advancements in AIT research for allergic rhinitis.

Main Methods:

• Review of randomized controlled trials and real-life studies on AIT effectiveness.
• Analysis of immune cell modulation by AIT, including FcεRⅠ activity, ILC2s, and DCreg subsets.
• Examination of shifts in T-helper cell responses (Th2 to Th1) following AIT.

Main Results:

• AIT demonstrates significant effectiveness in altering immune responses for AR.
• AIT modulates immune cells by inhibiting FcεRⅠ, enhancing epithelial function, and shifting ILC2 and DCreg populations.
• AIT promotes a transition from Th2 to Th1 immune responses, crucial for allergy management.

Conclusions:

• Allergen-specific immunotherapy is a promising, curative treatment for allergic rhinitis.
• AIT offers long-term benefits by modifying the underlying allergic immune mechanisms.
• Continued research into immune cell roles in AIT will refine treatment strategies for AR.