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Carolyn Rydyznski Moderbacher, … , Gregory Glenn, Shane Crotty
Published August 9, 2022
Citation Information: J Clin Invest. 2022;132(19):e160898. https://doi.org/10.1172/JCI160898.
Citation Information: J Clin Invest. 2022;132(19):e160898. https://doi.org/10.1172/JCI160898.
Abstract
NVX-CoV2373 is an adjuvanted recombinant full-length SARS-CoV-2 spike trimer protein vaccine demonstrated to be protective against COVID-19 in efficacy trials. Here we demonstrate that vaccinated individuals made CD4+ T cell responses after 1 and 2 doses of NVX-CoV2373, and a subset of individuals made CD8+ T cell responses. Characterization of the vaccine-elicited CD8+ T cells demonstrated IFN-γ production. Characterization of the vaccine-elicited CD4+ T cells revealed both circulating T follicular helper (cTfh) cells and Th1 cells (IFN-γ+, TNF-α+, and IL-2+) were detectable within 7 days of the primary immunization. Spike-specific CD4+ T cells were correlated with the magnitude of the later SARS-CoV-2–neutralizing antibody titers, indicating that robust generation of CD4+ T cells, capable of supporting humoral immune responses, may be a key characteristic of NVX-CoV2373 that utilizes Matrix-M adjuvant.
Authors
Carolyn Rydyznski Moderbacher, Christina Kim, Jose Mateus, Joyce Plested, Mingzhu Zhu, Shane Cloney-Clark, Daniela Weiskopf, Alessandro Sette, Louis Fries, Gregory Glenn, Shane Crotty
Citation information
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