An mRNA Vaccine Based on Antigens From Conserved Regions of Monkeypox Virus A35R and M1R With a Dimer-Like Conformation Confers Protection Against Both Monkeypox Virus and Vaccinia Virus Infections in Mice.

ABSTRACT: The 2022 global mpox outbreak caused by the monkeypox virus (MPXV) has underscored the urgent need for improved vaccine development. To address this need, we developed four candidate vaccine antigens based on conserved sequences of the MPXV A35R and M1R proteins utilizing a lipid nanoparticle (LNP) delivery system. All four vaccine candidates elicited varying degrees of humoral and cellular immune responses and conferred differential protection against MPXV and vaccinia virus (VACV) in BALB/c mice; notably, the dual-antigen vaccines MV1 and MV2 induced more potent immunogenicity, including higher neutralizing antibody titers and cytokine secretion levels. However, among the four candidates, only the dual-antigen vaccines MV1 and MV2 conferred protective efficacy in AGB6 mice and reduced in

SUBMITTER: Tang C 

PROVIDER: S-EPMC12828169 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature