期刊
NATURE
卷 590, 期 7847, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41586-020-03041-6
关键词
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资金
- Ragon Institute of MGH, MIT and Harvard
- Mark and Lisa Schwartz Foundation
- Massachusetts Consortium on Pathogen Readiness (MassCPR)
- Bill & Melinda Gates Foundation [INV-006131]
- National Institutes of Health [OD024917, AI129797, AI124377, AI128751, AI126603, CA260476]
- Bill and Melinda Gates Foundation [INV-006131] Funding Source: Bill and Melinda Gates Foundation
Adoptive transfer of purified IgG from convalescent macaques protects naive macaques against SARS-CoV-2 infection, and cellular immune responses contribute to protection against rechallenge with SARS-CoV-2. The findings suggest that relatively low antibody titres are sufficient for protection against SARS-CoV-2 in macaques, while higher antibody titres are required for treatment of SARS-CoV-2 infection.
Adoptive transfer of purified IgG from convalescent macaques protects naive macaques against SARS-CoV-2 infection, and cellular immune responses contribute to protection against rechallenge with SARS-CoV-2. Recent studies have reported the protective efficacy of both natural(1) and vaccine-induced(2-7) immunity against challenge with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in rhesus macaques. However, the importance of humoral and cellular immunity for protection against infection with SARS-CoV-2 remains to be determined. Here we show that the adoptive transfer of purified IgG from convalescent rhesus macaques (Macaca mulatta) protects naive recipient macaques against challenge with SARS-CoV-2 in a dose-dependent fashion. Depletion of CD8(+) T cells in convalescent macaques partially abrogated the protective efficacy of natural immunity against rechallenge with SARS-CoV-2, which suggests a role for cellular immunity in the context of waning or subprotective antibody titres. These data demonstrate that relatively low antibody titres are sufficient for protection against SARS-CoV-2 in rhesus macaques, and that cellular immune responses may contribute to protection if antibody responses are suboptimal. We also show that higher antibody titres are required for treatment of SARS-CoV-2 infection in macaques. These findings have implications for the development of SARS-CoV-2 vaccines and immune-based therapeutic agents.
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