Prior vaccination promotes early activation of memory T cells and enhances immune responses during SARS-CoV-2 breakthrough infection
- PMID: 37735592
- DOI: 10.1038/s41590-023-01613-y
Prior vaccination promotes early activation of memory T cells and enhances immune responses during SARS-CoV-2 breakthrough infection
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection of vaccinated individuals is increasingly common but rarely results in severe disease, likely due to the enhanced potency and accelerated kinetics of memory immune responses. However, there have been few opportunities to rigorously study early recall responses during human viral infection. To better understand human immune memory and identify potential mediators of lasting vaccine efficacy, we used high-dimensional flow cytometry and SARS-CoV-2 antigen probes to examine immune responses in longitudinal samples from vaccinated individuals infected during the Omicron wave. These studies revealed heightened spike-specific responses during infection of vaccinated compared to unvaccinated individuals. Spike-specific cluster of differentiation (CD)4 T cells and plasmablasts expanded and CD8 T cells were robustly activated during the first week. In contrast, memory B cell activation, neutralizing antibody production and primary responses to nonspike antigens occurred during the second week. Collectively, these data demonstrate the functionality of vaccine-primed immune memory and highlight memory T cells as rapid responders during SARS-CoV-2 infection.
© 2023. The Author(s), under exclusive licence to Springer Nature America, Inc.
Update of
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Prior vaccination enhances immune responses during SARS-CoV-2 breakthrough infection with early activation of memory T cells followed by production of potent neutralizing antibodies.bioRxiv [Preprint]. 2023 Feb 6:2023.02.05.527215. doi: 10.1101/2023.02.05.527215. bioRxiv. 2023. Update in: Nat Immunol. 2023 Oct;24(10):1711-1724. doi: 10.1038/s41590-023-01613-y. PMID: 36798171 Free PMC article. Updated. Preprint.
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- AI082630/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- AI108545/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- AI155577/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- AI149680/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- U19AI082630/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- 75N9301900065/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- AI152236/U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- UL1TR001878/U.S. Department of Health & Human Services | NIH | National Center for Advancing Translational Sciences (NCATS)
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