Academy of Military Medical Sciences, Ams, Pla

Xiaodong Zai

Wei Chen

Jun Zhang

Junjie Xu

Lihua Hou

Yu Li

Xiaofan Zhao

Yilong Yang

An mRNA molecule is disclosed. The mRNA molecule contains a polynucleotide encoding an M1R antigen of Mpox and a polynucleotide encoding an RBD antigen of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and further contains a polynucleotide encoding an A35R antigen of Mpox. An application of the mRNA molecule in the preparation of an mRNA vaccine against Mpox or SARS-CoV-2 is further disclosed. Compared to an mRNA vaccine encoding separately corresponding antigens, the provided mRNA vaccine encoding a fusion antigen can induce considerable or even higher-level neutralizing antibody responses against Mpox and SARS-CoV-2, and provides 100% immune protection against the lethal challenge of ectromelia virus. The vaccine is obtained by synthesizing a single mRNA molecule and encapsulating the single mRNA within lipid nanoparticles. Therefore, the single-component fusion mRNA vaccine has a wider application prospect than multivalent mRNA vaccine compositions.

mRNA vaccine encoding fusion antigen against Mpox and severe acute respiratory syndrome coronavirus 2

Growing community of inventors

Beijing, China

Xiaodong Zai