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HIV-Specific Antibody-Dependent Cellular Cytotoxicity (ADCC) -Mediating Antibodies Decline while NK Cell Function Increases during Antiretroviral Therapy (ART)
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HIV-Specific Antibody-Dependent Cellular Cytotoxicity (ADCC) -Mediating Antibodies Decline while NK Cell Function Increases during Antiretroviral Therapy (ART)
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Journal Article
HIV-Specific Antibody-Dependent Cellular Cytotoxicity (ADCC) -Mediating Antibodies Decline while NK Cell Function Increases during Antiretroviral Therapy (ART)
2015
Overview
Understanding alterations in HIV-specific immune responses during antiretroviral therapy (ART), such as antibody-dependent cellular cytotoxicity (ADCC), is important in the development of novel strategies to control HIV-1 infection. This study included 53 HIV-1 positive individuals. We evaluated the ability of effector cells and antibodies to mediate ADCC separately and in combination using the ADCC-PanToxiLux assay. The ability of the peripheral blood mononuclear cells (PBMCs) to mediate ADCC was significantly higher in individuals who had been treated with ART before seroconversion, compared to the individuals initiating ART at a low CD4+ T cell count (<350 cells/μl blood) and the ART-naïve individuals. The frequency of CD16 expressing natural killer (NK) cells correlated with both the duration of ART and Granzyme B (GzB) activity. In contrast, the plasma titer of antibodies mediating ADCC declined during ART. These findings suggest improved cytotoxic function of the NK cells if initiating ART early during infection, while the levels of ADCC mediating antibodies declined during ART.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Aged
/ Anti-Retroviral Agents - administration & dosage
/ Antibody-Dependent Cell Cytotoxicity - drug effects
/ Blood
/ Female
/ GPI-Linked Proteins - immunology
/ Highly active antiretroviral therapy
/ HIV
/ HIV Infections - drug therapy
/ Human immunodeficiency virus
/ Humans
/ Killer Cells, Natural - immunology
/ Killer Cells, Natural - pathology
/ Male
/ Peripheral blood mononuclear cells
/ Plasma
/ Proteins
/ R&D
/ Studies
/ T cells
/ Therapy
/ Toxicity
/ Virology
