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J Virol. 1992 June; 66(6): 3950-3954

Protein of macaques against infection with simian type D retrovirus (SRV-1) by immunization with recombinant vaccinia virus expressing the envelope glycoproteins of either SRV-1 or Mason-Pfizer monkey virus (SRV-3).

B A Brody, E Hunter, J D Kluge, R Lasarow, M Gardner and P A Marx

Department of Microbiology, University of Alabama, Birmingham 35294.

ABSTRACT

Rhesus macaques were immunized with live vaccinia virus recombinants expressing the envelope glycoproteins (gp70 and gp22) of simian type D retrovirus (SRV), serotype 1 or 3. All of the animals immunized with either the SRV-1 env or the SRV-3 env vaccinia virus recombinant developed neutralizing antibodies against the homologous SRV. In addition, both groups developed cross-reactive antibodies and were protected against an intravenous live-virus challenge with SRV-1. The four control animals immunized with a vaccinia virus recombinant expressing the G protein of respiratory syncytial virus were not protected against the same SRV-1 challenge. Although SRV-1 and SRV-3 immune sera showed cross-neutralization, they failed to neutralize a separate, more distantly related serotype, SRV-2, in an in vitro assay. These findings are consistent with the known degree of serologic and genetic relatedness of these three SRV strains.

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J Virol. 1992 June; 66(6): 3950-3954

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