Abstract：
:Many influenza vaccines targeted to hemagglutinin (HA) show efficient immunogenicity for protecting subjects against influenza virus infection. Major antigenic changes to HA molecules can help influenza virus to develop resistance against HA-targeted vaccines. DNA vaccines encoding conserved antigens protect animals against diverse subtypes, but their potency requires further improvement. We generated a DNA-based nucleoprotein (NP)-targeted vaccine using an N-terminal mutant of NP (NPm) that efficiently localized in the cytoplasm, and examined the immune responses in mice immunized with NPm or wild-type (WT) NP DNA vaccine. Importantly, the NPm vaccine showed 1.5-2-fold higher immunogenicity than the WT NP vaccine in mice. Furthermore, NPm vaccination efficiently protected the mice against lethal challenge with influenza viruses and showed cross-reactivity toward heterologous viruses. Therefore, DNA-based vaccination with NPm may contribute to the development of protective immunity against diverse influenza virus through its ability to stimulate cellular immunity.
journal_name
Vaccinejournal_title
Vaccineauthors
Ohba K,Yoshida S,Zahidunnabi Dewan M,Shimura H,Sakamaki N,Takeshita F,Yamamoto N,Okuda Kdoi
10.1016/j.vaccine.2007.02.074subject
Has Abstractpub_date
2007-05-22 00:00:00pages
4291-300issue
21eissn
0264-410Xissn
1873-2518pii
S0264-410X(07)00238-1journal_volume
25pub_type
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