Rapid and stable mobilization of CD8+ T cells by SARS-CoV-2 mRNA vaccine.
Nature
; 597(7875): 268-273, 2021 09.
Article
in English
| MEDLINE | ID: covidwho-1328849
ABSTRACT
SARS-CoV-2 spike mRNA vaccines1-3 mediate protection from severe disease as early as ten days after prime vaccination3, when neutralizing antibodies are hardly detectable4-6. Vaccine-induced CD8+ T cells may therefore be the main mediators of protection at this early stage7,8. The details of their induction, comparison to natural infection, and association with other arms of vaccine-induced immunity remain, however, incompletely understood. Here we show on a single-epitope level that a stable and fully functional CD8+ T cell response is vigorously mobilized one week after prime vaccination with bnt162b2, when circulating CD4+ T cells and neutralizing antibodies are still weakly detectable. Boost vaccination induced a robust expansion that generated highly differentiated effector CD8+ T cells; however, neither the functional capacity nor the memory precursor T cell pool was affected. Compared with natural infection, vaccine-induced early memory T cells exhibited similar functional capacities but a different subset distribution. Our results indicate that CD8+ T cells are important effector cells, are expanded in the early protection window after prime vaccination, precede maturation of other effector arms of vaccine-induced immunity and are stably maintained after boost vaccination.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Vaccines, Synthetic
/
Vaccination
/
CD8-Positive T-Lymphocytes
/
COVID-19 Vaccines
/
SARS-CoV-2
/
COVID-19
Topics:
Vaccines
Limits:
Humans
Language:
English
Journal:
Nature
Year:
2021
Document Type:
Article
Affiliation country:
S41586-021-03841-4
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