The immunogenicity and efficacy of a DNA vaccine can be greatly enhanced when a gene adjuvant is used. LIGHT, a member of TNF superfamily, can function as a costimulatory molecule for human naïve T cells to proliferate and can be a potential gene adjuvant. In the current study, the eukaryotic expression plasmid pcDNA-nef was constructed by inserting a full-length nef gene into pcDNA3.1(+), and an in vitro transfection experiment suggested that the nef gene could be expressed successfully in mammalian cells. BALB/c mice were immunized with HIV-1 nef DNA vaccine plasmids alone or in combination with LIGHT expression plasmids, and the specific humoral and cellular immune responses were measured. The data showed that HIV-1 nef DNA vaccine plasmids could induce anti-Nef antibodies, Nef-specific lymphocyte proliferation and CTL activity, whereas stronger specific immune responses were induced in mice when co-immunizing with HIV-1 nef DNA vaccine plasmids and LIGHT expression plasmids, suggesting that the eukaryotic expression vector encoding HIV-1 nef is capable of inducing specific immune responses towards HIV-1 Nef and that LIGHT could be considered as a gene adjuvant for HIV-1 DNA vaccination.
Archives of Virology – Springer Journals
Published: Jul 1, 2014
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