Protective effect of vaginal application of neutralizing and nonneutralizing inhibitory antibodies against vaginal SHIV challenge in macaques

Definition of antibody (Ab) functions capable of preventing mucosal HIV transmission may be critical to both effective vaccine development and the prophylactic use of monoclonal Abs. Although direct antibody-mediated neutralization is highly effective against cell-free virus, increasing evidence sug...

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Veröffentlicht in:Mucosal immunology 2014, Vol.7 (1), p.46-56
Hauptverfasser: Moog, C, Dereuddre-Bosquet, N, Teillaud, J-L, Biedma, M E, Holl, V, Van Ham, G, Heyndrickx, L, Van Dorsselaer, A, Katinger, D, Vcelar, B, Zolla-Pazner, S, Mangeot, I, Kelly, C, Shattock, R J, Le Grand, R
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container_issue 1
container_start_page 46
container_title Mucosal immunology
container_volume 7
creator Moog, C
Dereuddre-Bosquet, N
Teillaud, J-L
Biedma, M E
Holl, V
Van Ham, G
Heyndrickx, L
Van Dorsselaer, A
Katinger, D
Vcelar, B
Zolla-Pazner, S
Mangeot, I
Kelly, C
Shattock, R J
Le Grand, R
description Definition of antibody (Ab) functions capable of preventing mucosal HIV transmission may be critical to both effective vaccine development and the prophylactic use of monoclonal Abs. Although direct antibody-mediated neutralization is highly effective against cell-free virus, increasing evidence suggests an important role for immunoglobulin G (IgG) Fcγ receptor (FcγR)–mediated inhibition of HIV replication. Thus, a panel of well-known neutralizing (NAbs) and nonneutralizing Abs (NoNAbs) were screened for their ability to block HIV acquisition and replication in vitro in either an independent or FcγR-dependent manner. Abs displaying the highest Fc-mediated inhibitory activity in various in vitro assays were selected, formulated for topical vaginal application in a microbicide gel, and tested for their antiviral activity against SHIVSF162P3 vaginal challenge in non-human primates (NHPs). A combination of three NAbs, 2G12, 2F5, and 4E10, fully prevented simian/human immunodeficiency virus (SHIV) vaginal transmission in 10 out of 15 treated NHPs, whereas a combination of two NoNAbs, 246-D and 4B3, although having no impact on SHIV acquisition, reduced plasma viral load. These results indicate that anti-HIV Abs with distinct neutralization and inhibitory functions differentially affect in vivo HIV acquisition and replication, by interfering with early viral replication and dissemination. Therefore, combining diverse Ab properties may potentiate the protective effects of anti-HIV-Ab-based strategies.
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subjects 631/154/51/1568
631/250/347
692/699/255/1901
Allergology
Animals
Antibodies
Antibodies, Monoclonal - administration & dosage
Antibodies, Monoclonal - immunology
Antibodies, Monoclonal - metabolism
Antibodies, Neutralizing - administration & dosage
Antibodies, Neutralizing - immunology
Antibodies, Neutralizing - metabolism
Antibody-Dependent Cell Cytotoxicity
Biomedical and Life Sciences
Biomedicine
Female
Gastroenterology
HIV Antibodies - administration & dosage
HIV Antibodies - immunology
HIV Antibodies - metabolism
Immunoglobulin Fc Fragments - immunology
Immunoglobulin Fc Fragments - metabolism
Immunology
Macaca fascicularis
Macrophages - immunology
Macrophages - virology
Neutralization Tests
Protein Binding - immunology
Receptors, IgG - metabolism
Simian Acquired Immunodeficiency Syndrome - immunology
Simian Acquired Immunodeficiency Syndrome - prevention & control
Simian Acquired Immunodeficiency Syndrome - virology
Simian Immunodeficiency Virus - immunology
Vagina - immunology
Vagina - virology
Virus Replication - immunology
title Protective effect of vaginal application of neutralizing and nonneutralizing inhibitory antibodies against vaginal SHIV challenge in macaques
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