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Evaluating the antibody response elicited by diverse HIV envelope immunogens in the African green monkey (Vervet) model
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Evaluating the antibody response elicited by diverse HIV envelope immunogens in the African green monkey (Vervet) model
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Journal Article
Evaluating the antibody response elicited by diverse HIV envelope immunogens in the African green monkey (Vervet) model
2024
Overview
African Green (Vervet) monkeys have been extensively studied to understand the pathogenesis of infectious diseases. Using vervet monkeys as pre-clinical models may be an attractive option for low-resourced areas as they are found abundantly and their maintenance is more cost-effective than bigger primates such as rhesus macaques. We assessed the feasibility of using vervet monkeys as animal models to examine the immunogenicity of HIV envelope trimer immunogens in pre-clinical testing. Three groups of vervet monkeys were subcutaneously immunized with either the BG505 SOSIP.664 trimer, a novel subtype C SOSIP.664 trimer, CAP255, or a combination of BG505, CAP255 and CAP256.SU SOSIP.664 trimers. All groups of vervet monkeys developed robust binding antibodies by the second immunization with the peak antibody response occurring after the third immunization. Similar to binding, antibody dependent cellular phagocytosis was also observed in all the monkeys. While all animals developed potent, heterologous Tier 1 neutralizing antibody responses, autologous neutralization was limited with only half of the animals in each group developing responses to their vaccine-matched pseudovirus. These data suggest that the vervet monkey model may yield distinct antibody responses compared to other models. Further study is required to further determine the utility of this model in HIV immunization studies.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ AIDS Vaccines - administration & dosage
/ Animals
/ Antibodies, Neutralizing - immunology
/ Antibody Formation - immunology
/ env Gene Products, Human Immunodeficiency Virus - immunology
/ HIV
/ HIV Infections - prevention & control
/ Human immunodeficiency virus
/ Humanities and Social Sciences
/ Science
/ Trimers
