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Detailed analysis of antibody responses to SARS-CoV-2 vaccination and infection in macaques
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Detailed analysis of antibody responses to SARS-CoV-2 vaccination and infection in macaques
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Journal Article
Detailed analysis of antibody responses to SARS-CoV-2 vaccination and infection in macaques
2022
Overview
Macaques are a commonly used model for studying immunity to human viruses, including for studies of SARS-CoV-2 infection and vaccination. However, it is unknown whether macaque antibody responses resemble the response in humans. To answer this question, we employed a phage-based deep mutational scanning approach (Phage-DMS) to compare which linear epitopes are targeted on the SARS-CoV-2 Spike protein in convalescent humans, convalescent (re-infected) rhesus macaques, mRNA-vaccinated humans, and repRNA-vaccinated pigtail macaques. We also used Phage-DMS to determine antibody escape pathways within each epitope, enabling a granular comparison of antibody binding specificities at the locus level. Overall, we identified some common epitope targets in both macaques and humans, including in the fusion peptide (FP) and stem helix-heptad repeat 2 (SH-H) regions. Differences between groups included a response to epitopes in the N-terminal domain (NTD) and C-terminal domain (CTD) in vaccinated humans but not vaccinated macaques, as well as recognition of a CTD epitope and epitopes flanking the FP in convalescent macaques but not convalescent humans. There was also considerable variability in the escape pathways among individuals within each group. Sera from convalescent macaques showed the least variability in escape overall and converged on a common response with vaccinated humans in the SH-H epitope region, suggesting highly similar antibodies were elicited. Collectively, these findings suggest that the antibody response to SARS-CoV-2 in macaques shares many features with humans, but with substantial differences in the recognition of certain epitopes and considerable individual variability in antibody escape profiles, suggesting a diverse repertoire of antibodies that can respond to major epitopes in both humans and macaques. Differences in macaque species and exposure type may also contribute to these findings.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Animals
/ COVID-19
/ COVID-19 - prevention & control
/ Domains
/ Epitopes
/ Humans
/ Identification and classification
/ Medicine and Health Sciences
/ mRNA
/ Pathways
/ Peptides
/ Phages
/ Proteins
/ Research and Analysis Methods
/ Severe acute respiratory syndrome
/ Severe acute respiratory syndrome coronavirus 2
/ Spike Glycoprotein, Coronavirus
/ Viruses
