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    Virology. 2006 Sep 30;353(2):344-56. Epub 2006 Jul 3.

    Rabies virus glycoprotein as a carrier for anthrax protective antigen.

    Smith ME, Koser M, Xiao S, Siler C, McGettigan JP, Calkins C, Pomerantz RJ, Dietzschold B, Schnell MJ.

    Source

    Department of Microbiology, Thomas Jefferson University, Philadelphia, PA 19107, USA.

    Abstract

    Live viral vectors expressing foreign antigens have shown great promise as vaccines against viral diseases. However, safety concerns remain a major problem regarding the use of even highly attenuated viral vectors. Using the rabies virus (RV) envelope protein as a carrier molecule, we show here that inactivated RV particles can be utilized to present Bacillus anthracis protective antigen (PA) domain-4 in the viral membrane. In addition to the RV glycoprotein (G) transmembrane and cytoplasmic domains, a portion of the RV G ectodomain was required to express the chimeric RV G anthrax PA on the cell surface. The novel antigen was also efficiently incorporated into RV virions. Mice immunized with the inactivated recombinant RV virions exhibited seroconversion against both RV G and anthrax PA, and a second inoculation greatly increased these responses. These data demonstrate that a viral envelope protein can carry a bacterial protein and that a viral carrier can display whole polypeptides compared to the limited epitope presentation of previous viral systems.

    PMID:
    16820183
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC1576297
    Free PMC Article

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