MRNA-LNP vaccine encoding CDV hemagglutinin confers effective protection in raccoon dogs.

ABSTRACT: Canine distemper virus (CDV) is a highly contagious morbillivirus that causes severe disease in carnivores, with raccoon dogs (Nyctereutes procyonoides) serving as major reservoirs for transmission. To address the limitations of current vaccines-such as virulence reversion, multiple doses, and poor efficacy in raccoon dogs-we developed a novel mRNA-lipid nanoparticle (LNP) vaccine encoding a secreted, tetrameric CDV hemagglutinin (H) protein fused to a signal peptide and Tetrabrachion domain to enhance stability and immunogenicity. The vaccine showed high purity, uniform particle size (~108 nm), and efficient in vivo expression of glycosylated H protein. In BALB/c mice, it induced strong H-specific IgG and increased splenic CD4⁺ T cells, suggesting a Th-skewed immune response. In raccoon d

SUBMITTER: Zhang C 

PROVIDER: S-EPMC12820130 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature