id author title date pages extension mime words sentences flesch summary cache txt cord-297826-2nruf2g7 Tian, Jing-Hui SARS-CoV-2 spike glycoprotein vaccine candidate NVX-CoV2373 elicits immunogenicity in baboons and protection in mice 2020-06-30 .txt text/plain 2660 171 60 In mice and baboons, low-dose NVX-CoV2373 with saponin-based Matrix-M adjuvant elicits high titer anti-S IgG that is associated with blockade of hACE2 receptor binding, virus neutralization, and protection against SARS-CoV-2 challenge in mice with no evidence of vaccine-associated enhanced respiratory disease (VAERD). Mice 171 immunized with 10 μg dose of NVX-CoV2373/Matrix-M induced antibodies that blocked 172 hACE2 receptor binding to S-protein and virus neutralizing antibodies 21-28-days after 173 a single priming dose ( Fig. 4B and 4C ). Importantly, we found the frequency 254 of IFN-γ + , TNF-α + , and IL-2 + cytokine-secreting CD4 + and CD8 + T cells was 255 significantly higher (p <0.0001) in spleens from the NVX-CoV2373/Matrix-M immunized 256 mice compared to mice immunized without adjuvant ( Fig. 6B and 6C) . Anti-S protein IgG titers were detected within 21-days of a single priming immunization 288 in animals immunized with NVX-CoV2373/Matrix-M across all the dose levels (GMT = 289 1,249-19,000). ./cache/cord-297826-2nruf2g7.txt ./txt/cord-297826-2nruf2g7.txt