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    Microbes Infect. 2006 Oct;8(12-13):2706-14. Epub 2006 Aug 28.

    Intranasal administration of adjuvant-combined recombinant influenza virus HA vaccine protects mice from the lethal H5N1 virus infection.

    Source

    Department of Pathology, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashimurayama-shi, Tokyo 208-0011, Japan.

    Abstract

    Attenuated recombinant H5N1 influenza virus was constructed to develop a safe H5N1 influenza vaccine. The immunogenicity and protective effect of the vaccine prepared from haemagglutinin-modified recombinant H5N1 influenza virus was evaluated in mice intranasally co-administered with cholera toxin B subunit containing a trace amount of holotoxin (CTB*), synthetic double-stranded RNA, poly (I:C) or chitin microparticles (CMP) as adjuvants. Intranasal administration of recombinant H5 HA split vaccine with CTB* or poly(I:C) and/or CMP elicited an immunological response with both anti-H5 HA IgA in the nasal wash and anti-H5 HA IgG antibody in the serum, and showed a protective against lethal H5N1 A/Hong Kong/483/97 (HK483) infection. We also demonstrated that intranasal co-administration of antigen with both poly (I:C) and CMP enhanced the expression of Toll-like receptor (TLR) 3, TLR7 in the spleen. These results indicate that poly (I:C) and CMP are highly effective as mucosal adjuvants for use with the nasal H5N1 vaccine.

    PMID:
    16968669
    [PubMed - indexed for MEDLINE]

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