Abstract
An ideal protective HIV-1 vaccine can elicit broadly neutralizing antibodies, capable of preventing HIV transmission. The strategies of designing vaccines include generation of soluble recombinant proteins which mimic the native Env complex and are able to enhance the immunogenicity of gp120. Recent data indicate that the cytoplasmic tail (CT) of the Env protein has multiple functions, which can affect the early steps of infection, as well as viral assembly and antigenic properties. Modifications in the CT can be used to induce conformational changes in functional regions of gp120 and to stabilize the trimeric structure, avoiding immune misdirection and induction of non-neutralizing antibody responses. Env-trimers with modified CTs in virus-like particles (VLPs) are able to induce antibodies with broad spectrum neutralizing activity and high avidity and have the potential for developing an effective vaccine against HIV.
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