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New Generation of Allergen Immunotherapy Using Virus-Like Particles: A Comprehensive Review.

Alain Jacquet¹, Antonia Fettelschoss-Gabriel^2,3,4, Pål Johansen^2,3

¹Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology

|February 12, 2026

Summary

Virus-like particle (VLP)-based immunotherapy offers a new way to treat allergies by using nanoparticles to create protective antibodies. This approach shows promise in clinical trials for improving allergy treatments.

Keywords:

Th2 biomarker allergen blocking IgG antibodies hypoallergenicity virus‐like‐particle

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Area of Science:

Immunology
Nanotechnology
Allergy Research

Background:

Allergic diseases involve IgE-mediated reactions.
Current immunotherapies have limitations.
Virus-like particles (VLPs) are non-infectious nanoparticles that can display antigens.

Purpose of the Study:

To evaluate Virus-like particle (VLP)-based allergen immunotherapy (AIT) as a novel treatment for allergic diseases.
To explore the mechanisms by which VLPs induce immune tolerance and suppress allergic responses.
To assess the safety and efficacy of VLP-based allergy vaccines in preclinical and clinical settings.

Main Methods:

Conjugating allergens to VLPs to create VLP-based allergy vaccines.
Administering low-dose VLP-allergen conjugates in preclinical models.
Conducting clinical trials to assess VLP-based AIT in humans.
Analyzing immune responses, including IgG production and Th1/Th2 bias.

Main Results:

VLP-based AIT efficiently activates B cells and antigen-presenting cells, leading to robust polyclonal IgG production.
VLPs stimulate innate immunity via Toll-like receptor (TLR) signaling, promoting a Th1-biased response.
Preclinical studies showed a shift from Th2-biased to non-pathogenic immune responses.
Clinical trials demonstrated that VLP-based allergy vaccines are well-tolerated and elicit allergen-specific IgG antibodies.

Conclusions:

VLP-based AIT is a promising approach for treating allergic diseases by inducing allergen-specific IgG and promoting immune tolerance.
VLPs offer a platform for developing effective allergy vaccines that re-educate the immune system.
Further research is needed to optimize VLP formulations, address challenges like quality control and pre-existing immunity, and conduct large-scale trials.