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  • Title: Replication-deficient rabies virus-based vaccines are safe and immunogenic in mice and nonhuman primates.
    Author: Cenna J, Hunter M, Tan GS, Papaneri AB, Ribka EP, Schnell MJ, Marx PA, McGettigan JP.
    Journal: J Infect Dis; 2009 Oct 15; 200(8):1251-60. PubMed ID: 19764884.
    Abstract:
    Although current postexposure prophylaxis rabies virus (RV) vaccines are effective, approximately 40,000-70,000 rabies-related deaths are reported annually worldwide. The development of effective formulations requiring only 1-2 applications would significantly reduce mortality. We assessed in mice and nonhuman primates the efficacy of replication-deficient RV vaccine vectors that lack either the matrix (M) or phosphoprotein (P) gene. A single dose of M gene-deficient RV induced a more rapid and efficient anti-RV response than did P gene-deficient RV immunization. Furthermore, the M gene-deleted RV vaccine induced 4-fold higher virus-neutralizing antibody (VNA) levels in rhesus macaques than did a commercial vaccine within 10 days after inoculation, and at 180 days after immunization rhesus macaques remained healthy and had higher-avidity antibodies, higher VNA titers, and a more potent antibody response typical of a type 1 T helper response than did animals immunized with a commercial vaccine. The data presented in this article suggest that the M gene-deleted RV vaccine is safe and effective and holds the potential of replacing current pre- and postexposure RV vaccines.
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