Progress in allergen immunotherapy via advanced transdermal delivery routes

Area of Science:

• Immunology
• Allergy Research
• Dermatology

Background:

• Food allergies, especially to peanuts and tree nuts, can cause severe anaphylaxis.
• Current immunotherapies (oral, sublingual, epicutaneous) have limitations in efficacy, safety, and patient adherence.

Purpose of the Study:

• To review emerging advanced transdermal immunotherapeutic techniques for food allergies.
• To highlight the potential of minimally invasive methods for improved allergen delivery and immune response modulation.

Main Methods:

• Focus on transdermal delivery systems: jet injectors, iontophoresis, sonophoresis, and microneedles.
• Review of preclinical allergy studies evaluating these advanced techniques.

Main Results:

• Transdermal methods enable minimally invasive allergen delivery to dermal antigen-presenting cells.
• Preclinical studies show reduced IgE and histamine, increased IgG1, Th1 immune shifts, and regulatory cytokine upregulation (IL-10).
• These indicate potential for durable desensitization with improved safety, tolerance, and compliance.

Conclusions:

• Emerging transdermal techniques show promise for safer and more effective food allergy immunotherapy.
• Further clinical research is necessary to optimize these therapies and expand their use for various tree nut allergies.