Cited by 132SARS-CoV-2 and COVID-19 ResearchHIV Research and TreatmentImmune responses and vaccinations

CD8 T cells contribute to vaccine protection against SARS-CoV-2 in macaques

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Liu, Jinyan, Yu, Jingyou, McMahan, Katherine, Jacob-Dolan, Catherine, He, Xuan, Giffin, Victoria, Wu, Cindy, Sciacca, Michaela +17 more·2022·Science Immunology

Abstract

Spike-specific neutralizing antibodies (NAbs) are generally considered key correlates of vaccine protection against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Recently, robust vaccine prevention of severe disease with SARS-CoV-2 variants that largely escape NAb responses has been reported, suggesting a role for other immune parameters for virologic control. However, direct data demonstrating a role of CD8 + T cells in vaccine protection have not yet been reported. In this study, we show that vaccine-elicited CD8 + T cells contribute substantially to virologic control after SARS-CoV-2 challenge in rhesus macaques. We vaccinated 30 macaques with a single immunization of the adenovirus vector–based vaccine Ad26.COV2.S or sham and then challenged them with 5 × 10 5 median tissue culture infectious dose SARS-CoV-2 B.1.617.2 (Delta) by the intranasal and intratracheal routes. All vaccinated animals were infected by this high-dose challenge but showed rapid virologic control in nasal swabs and bronchoalveolar lavage by day 4 after challenge. However, administration of an anti-CD8α– or anti-CD8β–depleting monoclonal antibody in vaccinated animals before SARS-CoV-2 challenge resulted in higher levels of peak and day 4 virus in both the upper and lower respiratory tracts. These data demonstrate that CD8 + T cells contribute substantially to vaccine protection against SARS-CoV-2 replication in macaques.

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Authors
Liu, J., Yu, J., McMahan, K., Jacob-Dolan, C., He, X., Giffin, V., Wu, C., Sciacca, M., Powers, O., Nampanya, F., Miller, J., Lifton, M., Hope, D., Hall, K., Hachmann, N. P., Chung, B., Anioke, T., Li, W., Muench, J., Gamblin, A., Boursiquot, M., Cook, A., Lewis, M. G., Andersen, H., & Barouch, D. H.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • University of Massachusetts Lowell (US)
  • Bioqual (US)
  • Bioqual, Rockville, MD 20852, USA.
Corresponding author
  • Liu, Jinyan
  • Yu, Jingyou
  • McMahan, Katherine
  • Jacob-Dolan, Catherine
  • He, Xuan
  • Giffin, Victoria
  • Barouch, Dan H.
Venue
Science Immunology
Published
2022-11-25
Volume
7
Issue
77
Pages
eabq7647-eabq7647
ISSN
2470-9468 (ISSN-L)
OpenAlex
W4290774080
Cited by
132
References
31
Citations by year
2026: 6 · 2025: 28 · 2024: 36 · 2023: 50 · 2022: 11 · 2021: 1
FWCI
15.28
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Science Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Institute of Allergy and Infectious Diseases (#75N93021C00014)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
Keywords
CD8+ T cells, SARS-CoV-2, adenovirus vector vaccine, Ad26.COV2-S, rhesus monkeys, Delta variant, viral load control, respiratory infections
MeSH terms
COVID-19, SARS-CoV-2, Ad26COVS1, Animals, Humans, Macaca mulatta, Viral Vaccines, CD8-Positive T-Lymphocytes

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