DNA Vaccination in the Skin Using Microneedles Improves Protection Against Influenza

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In this study, we tested the hypothesis that DNA vaccination in the skin using microneedles improves protective immunity compared to conventional intramuscular (IM) injection of a plasmid DNA vaccine encoding the influenza hemagglutinin (HA). In vivo fluorescence imaging demonstrated the expression of a reporter gene delivered to the skin using a solid microneedle patch coated with plasmid DNA. Vaccination at a low dose (3 mu g HA DNA) using microneedles generated significantly stronger humoral immune responses and better protective responses post-challenge compared to IM vaccination at either low or high (10 mu g HA DNA) dose. Vaccination using microneedles at a high (10 mu g) dose further generated improved post-challenge protection, as measured by survival, recall antibody-secreting cell responses in spleen and bone marrow, and interferon (IFN)-gamma cytokine T-cell responses. This study demonstrates that DNA vaccination in the skin using microneedles induces higher humoral and cellular immune responses as well as improves protective immunity compared to conventional IM injection of HA DNA vaccine. Received 10 October 2011; accepted 18 March 2012; advance online publication 17 April 2012. doi:10.1038/mt.2012.69
Publisher
NATURE PUBLISHING GROUP
Issue Date
2012-07
Language
English
Article Type
Article
Keywords

IMMUNOGLOBULIN-G SUBCLASS; VIRUS-LIKE PARTICLES; DENDRITIC CELLS; ANTIBODY-RESPONSES; IN-VIVO; A VIRUS; IMMUNITY; DELIVERY; IMMUNIZATION; VACCINES

Citation

MOLECULAR THERAPY, v.20, no.7, pp.1472 - 1480

ISSN
1525-0016
DOI
10.1038/mt.2012.69
URI
http://hdl.handle.net/10203/102768
Appears in Collection
CBE-Journal Papers(저널논문)
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