期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 105, 期 6, 页码 2100-2104出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0711629105
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We previously showed that a gp41 peptide (3S) induces expression of a natural killer (NK) ligand (NKp44L) on CD4(+) T cells during HIV-1 infection and that those cells are highly sensitive to NK lysis. In HIV-infected patients, anti-3S antibodies are associated with the maintenance of CD4(+) T cell counts close to their baseline values, and CD4(+) T cells decrease with the antibody titer. This study sought to determine whether anti-3S immunization could prevent NKp44L expression on these CD4(+) T cells in vivo and inhibits the subsequent decline in CD4(+) T cell counts by immunizing macaques with 3S and then infecting them with simian HIV162P3. The results show that anti-3S antibodies inhibited NKp44L expression and NK activity and cytotoxicity. They,also decreased the apoptosis rate of CD4(+) T cells in peripheral blood and lymph nodes. These data raise questions about the pathogenesis of HIV and present opportunities for both preventive and therapeutic HIV vaccine strategies.
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