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Microneedle-Mediated Allergen-Specific Immunotherapy for the Treatment of Airway Allergy in Mice.

Abstract：

:Subcutaneous allergen-specific immunotherapy (SCIT) qualifies as a promising approach for the permanent cure of IgE-mediated airway allergies, which can often manifest into allergic rhinitis and other allergic respiratory diseases. SCIT entails repeated administration of a high allergen dose into the subcutaneous (sc) region using a hypodermic needle for many (3-5) years, which is inconvenient and painful and reduces patient compliance. To overcome these limitations, we hypothesized that microneedles (MNs), which are minimally invasive and painless, could provide a novel approach for allergen desensitization by depositing the allergen into the superficial layers of the skin. To test this hypothesis, we compared MNs and SCIT for allergen desensitization in a mouse model of ovalbumin (Ova)-induced airway allergy. Mice were first made allergic to Ova and then treated with MNs coated with Ova (with or without CpG as an adjuvant) or via SCIT-Ova + alum (subcutaneous Ova + alum injections) for comparison. Treatment with coated MNs significantly induced Ova-specific serum IgG antibodies in a manner comparable to SCIT-Ova + alum-treated group. To test the efficacy against allergen challenge, treated mice were challenged with Ova via the nasal route. Coated MNs with Ova and CpG (MN-Ova + CpG) considerably suppressed the airway inflammation in allergic mice, evidenced by downregulation of proinflammatory cytokines (IL-5 and IL-13), upregulation of anti-inflammatory cytokine IL-10, and activation of Ova-specific immune response in bronchoalveolar (BAL) fluid. The therapeutic capacity of MN-based allergy treatment was further validated by the reduction in eosinophil and mast cell infiltration in the lung tissues of mice treated with MN-Ova + CpG, and low deposition of mucus inside their lung bronchioles. Overall, coated MNs ameliorated the symptoms of airway allergy in mice similar to SCIT and could provide a novel means of painless allergen-specific immunotherapy.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Shakya AK,Lee CH,Gill HS

doi

10.1021/acs.molpharmaceut.0c00447

subject

Has Abstract

pub_date

2020-08-03 00:00:00

pages

3033-3042

issue

8

eissn

1543-8384

issn

1543-8392

journal_volume

17

pub_type

杂志文章

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