Effect of adjuvanting RBD-dimer-based subunit COVID-19 vaccines with Sepivac SWE™.

ABSTRACT: Protein subunit vaccines have been widely used to combat infectious diseases, including the current COVID-19 pandemic. Adjuvants play the key role in shaping the quality and magnitude of the immune response to protein and inactivated vaccines. We previously developed a protein subunit COVID-19 vaccine, termed ZF2001, based on an aluminium hydroxide-adjuvanted tandem-repeat dimeric receptor-binding domain (RBD) of the viral spike (S) protein. Here, we described the use of a squalene-based oil-in-water adjuvant, Sepivac SWE™ (abbreviated to SWE), to further improve the immunogenicity of this RBD-dimer-based subunit vaccines. Compared with ZF2001, SWE adjuvant enhanced the antibody and CD4⁺ T-cell responses in mice with at least 10 fold of dose sparing compared with ZF2001 adjuvant

SUBMITTER: Xu S 

PROVIDER: S-EPMC10028357 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature