Phase I clinical evaluation of a six-plasmid multiclade HIV-1 DNA candidate vaccine
2007
Abstract Needle-free delivery of a six-plasmid HIV-1 DNA vaccine encoding EnvA, EnvB, EnvC, and subtype B Gag, Pol, and Nef underwent open-label evaluation in 15 subjects; 14 completed the 0, 1, 2 month vaccination schedule. T cell responses to HIV-specific peptide pools were detected by intracellular cytokine staining of CD4 + [13/14 (93%)] and CD8 + [5/14 (36%)], and by ELISpot in 11/14 (79%). Ten of 14 (71%) had ELISA antibody responses to Env proteins. Compared to a four-plasmid product, Gag- and Nef-specific T cell responses were improved, while Env-specific responses were maintained. This candidate vaccine has now advanced to Phase II evaluation.
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