Enhanced memory responses to seasonal H1N1 influenza vaccination of the skin with the use of vaccine-coated microneedles
- PMID: 20017632
- PMCID: PMC2798016
- DOI: 10.1086/649228
Enhanced memory responses to seasonal H1N1 influenza vaccination of the skin with the use of vaccine-coated microneedles
Abstract
Background: Morbidity and mortality due to influenza could be reduced by improved vaccination.
Methods: To develop a novel skin delivery method that is simple and allows for easy self-administration, we prepared microneedle patches with stabilized influenza vaccine and investigated their protective immune responses.
Results: Mice vaccinated with a single microneedle dose of trehalose-stabilized influenza vaccine developed strong antibody responses that were long-lived. Compared with traditional intramuscular vaccination, stabilized microneedle vaccination was superior in inducing protective immunity, as was evidenced by efficient clearance of virus from the lung and enhanced humoral and antibody-secreting cell immune responses after 100% survival from lethal challenge. Vaccine stabilization was found to be important, because mice vaccinated with an unstabilized microneedle vaccine elicited a weaker immunoglobulin G 2a antibody response, compared with the stabilized microneedle vaccine, and were only partially protected against viral challenge. Improved trafficking of dendritic cells to regional lymph nodes as a result of microneedle delivery to the skin might play a role in contributing to improved protective immunity.
Conclusions: These findings suggest that vaccination of the skin using a microneedle patch can improve protective efficacy and induce long-term sustained immunogenicity and may also provide a simple method of administration to improve influenza vaccination coverage.
Conflict of interest statement
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