Combining DNA technologies and different modes of immunization for induction of humoral and cellular anti-HIV-1 immune responses.

We show here that it is possible to combine two different genetic immunogens, one designed to induce HIV-1 specific humoral immune responses (pKCMVgp160B) and one designed to induce cellular anti-HIV-1 immune responses (Auxo-GTU-MultiHIV), and still retain the major properties of both vaccine constructs. The two different constructs were delivered using two different methods; the gene-gun and the Biojector, which both are needle-free devices. In BALB/c mice we were able to induce high levels of HIV-1-specific T cell responses as well as high levels of anti-gp160 antibodies by co-administrating the vaccine constructs. The cellular immune responses, but not antibody responses, were moderately compromised from the combination. This study shows that it is a feasible strategy to combine different vaccines and modes of delivery, but that interference as to magnitude may occur to certain gene products.