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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Vaccination of mice with replication-defective human immunodeficiency virus induces cellular and humoral immunity and protects against vaccinia virus-gag challenge.

Here we describe as a potential vaccine candidate a replication-defective HIV that encodes multiple viral genes in addition to a cassette that includes both truncated cyclin T1 and an autofluorescent protein. After confirming functionality of the cyclin T1, we immunized mice intramuscularly once or twice with the replication-defective HIV vector pseudotyped with vesicular stomatitis virus (VSV) G protein (RD HIV), a plasmid encoding CMV-driven gag (gag DNA), or adenovirus gag (Ad5-gag). Capsid-specific antibody titers following RD HIV immunization were >10(6)/ml and approximately equivalent to those induced by gag DNA and Ad5-gag. Antibodies against the autofluorescent protein and VSV G were also detected. After RD HIV immunization ELISpot assays demonstrated Gag-specific interferon-gamma ( IFN-gamma) SFU equivalent to that of Ad5-gag and fourfold greater than that of gag DNA. HIV polymerase-specific IFN-gamma SFU values were similar, and boosting increased both antibody titers and the IFN-gamma response. Challenge using vaccinia virus (VV)-gag demonstrated significantly lower recoverable VV for RD HIV-immunized mice compared to controls. No significant differences were observed in vaccinated mice challenged with wild-type VV. This study demonstrates the efficacy of RD HIV in conferring HIV-specific immunity and protection in mice and suggests its potential use in humans as either a prophylactic or a therapeutic vaccine.[1]

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