Intradermal vaccination of live attenuated influenza vaccine protects mice against homologous and heterologous influenza challenges.
Journal
NPJ vaccines
ISSN: 2059-0105
Titre abrégé: NPJ Vaccines
Pays: England
ID NLM: 101699863
Informations de publication
Date de publication:
04 Aug 2021
04 Aug 2021
Historique:
received:
10
12
2020
accepted:
12
07
2021
entrez:
5
8
2021
pubmed:
6
8
2021
medline:
6
8
2021
Statut:
epublish
Résumé
We previously developed a temperature-sensitive, and NS1 gene deleted live attenuated influenza vaccine (DelNS1-LAIV) and demonstrated its potent protective efficacy in intranasally vaccinated mice. Here we investigated whether intradermal (i.d.) vaccination induces protective immunity. Our results showed that DelNS1-LAIV intradermal vaccination conferred effective and long-lasting protection against lethal virus challenge in mice. A single intradermal injection of DelNS1-LAIV conferred 100% survival with no weight loss in mice after A(H1N1)09 influenza virus (H1N1/415742Md) challenge. DelNS1-LAIV injection resulted in a significant reduction of lung viral load and reduced airway epithelial cell death and lung inflammatory cytokine responses at day 2 and 4 post challenge. Full protections of mice lasted for 6 months after immunization. In vitro infection of DelNS1-LAIV in monocyte-derived dendritic cells (MoDCs) demonstrated activation of antigen-presenting cells at 33 °C, together with the results of abortive replication of DelNS1-LAIV in skin tissue and strong upregulation of inflammatory cytokines/chemokines expression, our results suggested the strong immunogenicity of this vaccine. Further, we demonstrate that the underlying protection mechanism induced by intradermal DelNS1-LAIV is mainly attributed to antibody responses. Together, this study opens up an alternative route for the administration of LAIV, which may benefit individuals not suitable for intranasal LAIV immunization.
Identifiants
pubmed: 34349128
doi: 10.1038/s41541-021-00359-8
pii: 10.1038/s41541-021-00359-8
pmc: PMC8339132
doi:
Types de publication
Journal Article
Langues
eng
Pagination
95Informations de copyright
© 2021. The Author(s).
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