Rabies virus glycoprotein as a carrier for anthrax protective antigen

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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. © 2006 Elsevier Inc. All rights reserved.




Smith, M. E., Koser, M., Xiao, S., Siler, C., McGettigan, J. P., Calkins, C., … Schnell, M. J. (2006). Rabies virus glycoprotein as a carrier for anthrax protective antigen. Virology, 353(2), 344–356. https://doi.org/10.1016/j.virol.2006.05.010

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