Evaluation of genetic immunization adjuvants to improve the effectiveness of a human immunodeficiency virus type 2 (HIV-2) envelope DNA vaccine.

Abstract:

:In an effort to develop a more effective genetic immunization strategy for HIV, we developed an HIV-2 env DNA vaccine and evaluated three adjuvant formulations. The gp140 gene from HIV-2(UC2 )was synthesized using mammalian codons and cloned into a plasmid vector that expresses eukaryotic genes at high levels. We found that after three immunizations in mice, a novel cationic liposome formulation (Vaxfectin) was superior at inducing systemic and mucosal antibody responses compared to a naked DNA, a controlled release device (an Alzet minipump) and polysaccharide microparticles made from chitosan (P = 0.027). Vaxfectin also induced higher levels of systemic antibodies for each isotype and IgG subclass as well as levels of HIV-2-specific mucosal IgA (P = 0.034). When different routes of immunization were used with the Vaxfectin formulation, gp140-specific systemic antibody responses were highest by the intradermal route, mucosal antibody responses were highest by the intramuscular route, while the intranasal route was the least effective. These results suggest that this cationic liposome formulation is an important adjuvant to improve the effectiveness of genetic immunization strategies for AIDS, and that multiple routes of immunization should be employed for optimal efficacy for HIV vaccine candidates.

journal_name

DNA Cell Biol

journal_title

DNA and cell biology

authors

Locher CP,Witt SA,Ashlock BM,Levy JA

doi

10.1089/104454904322759911

keywords:

subject

Has Abstract

pub_date

2004-02-01 00:00:00

pages

107-10

issue

2

eissn

1044-5498

issn

1557-7430

journal_volume

23

pub_type

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