%0 Journal Article %T Isotype Diversification of IgG Antibodies to HIV Gag Proteins as a Therapeutic Vaccination Strategy for HIV Infection %A Martyn A. French %A Laila N. Abudulai %A Sonia Fernandez %J Vaccines %D 2013 %I MDPI AG %R 10.3390/vaccines1030328 %X The development of vaccines to treat and prevent human immunodeficiency virus (HIV) infection has been hampered by an incomplete understanding of ˇ°protectiveˇ± immune responses against HIV. Natural control of HIV-1 infection is associated with T-cell responses against HIV-1 Gag proteins, particularly CD8 + T-cell responses restricted by ˇ°protectiveˇ± HLA-B alleles, but other immune responses also contribute to immune control. These immune responses appear to include IgG antibodies to HIV-1 Gag proteins, interferon-a-dependant natural killer (NK) cell responses and plasmacytoid dendritic cell (pDC) responses. Here, it is proposed that isotype diversification of IgG antibodies against HIV-1 Gag proteins, to include IgG2, as well as IgG3 and IgG1 antibodies, will broaden the function of the antibody response and facilitate accessory cell responses against HIV-1 by NK cells and pDCs. We suggest that this should be investigated as a vaccination strategy for HIV-1 infection. %K HIV %K vaccine %K HIV-1 Gag %K IgG antibody diversification %K IgG subclasses %U http://www.mdpi.com/2076-393X/1/3/328