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Qualitative and Quantitative Variables that Affect the Potency of Fc- Mediated Effector Function In Vitro and In Vivo: Considerations for Passive Immunization Using Non-Neutralizing Antibodies

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Passive immunization studies in non-human primates have established unequivocally that virus neutralization can prevent infection, providing the impetus for current intense efforts to identify immunogens that elicit broadly neutralizing antibodies in humans. Although Fc-mediated effector function may also contribute to protection by neutralizing antibodies, its role in protection by non-neutralizing antibodies is controversial. Here, I review the literature suggesting a role for Fc-mediated effector by non-neutralizing antibodies in protective immunity against HIV-1 with a primary focus on antibody mediated cellular cytotoxicity (ADCC) and related responses such as antibody-dependent cellular viral inhibition (ADCVI). Special emphasis is placed on qualitative and quantitative variables including antibody specificity and dose-response behavior in vitro and in vivo, which I propose as key variables in future passive immunization studies. Properly configured, these studies should clarify the role of Fc-mediated effector function by nonneutralizing antibodies in protection against HIV-1.
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Keywords: Antibody-dependent cell mediated cytotoxicity; Fc-mediated effector function; antibody structure; antigen structure

Document Type: Research Article

Publication date: July 1, 2013

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  • Current HIV Research aims to cover all the latest and outstanding developments of HIV research. We invite comprehensive review articles and novel, pioneering work in the basic and clinical fields on all areas of HIV research, including virus replication and gene expression, HIV assembly, virus-cell interaction, viral pathogenesis, epidemiology and transmission, anti-retroviral therapy and adherence, drug discovery, the latest developments in HIV/AIDS vaccines and animal models, mechanisms and interactions with AIDS related diseases, social and public health issues related to HIV disease, and prevention of viral infection. Each issue of the journal contains a series of timely in-depth reviews and original research written by leaders in the field covering a range of current topics on HIV research. Periodically, the journal will invite guest editors to devote an issue on a particular area of HIV research of great interest that increases our understanding of the virus and its complex interaction with the host.
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