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    Vaccine. 2009 Sep 25;27(42):5875-84. Epub 2009 Aug 3.

    Superior efficacy of a recombinant flagellin:H5N1 HA globular head vaccine is determined by the placement of the globular head within flagellin.

    Song L, Zhang Y, Yun NE, Poussard AL, Smith JN, Smith JK, Borisevich V, Linde JJ, Zacks MA, Li H, Kavita U, Reiserova L, Liu X, Dumuren K, Balasubramanian B, Weaver B, Parent J, Umlauf S, Liu G, Huleatt J, Tussey L, Paessler S.

    Source

    VaxInnate Corporation, 3 Cedar Brook Drive, Cranbury, NJ 08512-0026, USA. langzhou.song@vaxinnate.com

    Abstract

    Transmission of highly pathogenic avian influenza (HPAI) between birds and humans is an ongoing threat that holds potential for the emergence of a pandemic influenza strain. A major barrier to an effective vaccine against avian influenza has been the generally poor immunopotency of many of the HPAI strains coupled with the manufacturing constraints employing conventional methodologies. Fusion of flagellin, a toll-like receptor-5 ligand, to vaccine antigens has been shown to enhance the immune response to the fused antigen in preclinical studies. Here, we have evaluated the immunogenicity and efficacy of a panel of flagellin-based hemagglutinin (HA) globular head fusion vaccines in inbred mice. The HA globular head of these vaccines is derived from the A/Vietnam/1203/04 (VN04; H5N1) HA molecule. We find that replacement of domain D3 of flagellin with the VN04 HA globular head creates a highly effective vaccine that elicits protective HAI titers which protect mice against disease and death in a lethal challenge model.

    PMID:
    19654064
    [PubMed - indexed for MEDLINE]

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