期刊
PLOS ONE
卷 14, 期 10, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0223684
关键词
-
资金
- Ministry of Health, Labour and Welfare of Japan [H30-SinkogyouseiShitei-10109700]
- Japan Agency for Medical Research and Development [18fk0108070j0101, 18fk0108072j0001]
Middle East respiratory syndrome-coronavirus (MERS-CoV) is an emerging virus that causes severe disease with fatal outcomes; however, there are currently no approved vaccines or specific treatments against MERS-CoV. Here, we developed a novel bivalent vaccine against MERS-CoV and rabies virus (RV) using the replication-incompetent P-gene deficient RV (RV Delta P), which has been previously established as a promising and safe viral vector. MERS-CoV spike glycoprotein comprises S1 and S2 subunits, with the S1 subunit being a primary target of neutralizing antibodies. Recombinant RV Delta P, which expresses S1 fused with transmembrane and cytoplasmic domains together with 14 amino acids from the ectodomains of the RV-glycoprotein (RV-G), was developed using a reverse genetics method and named RV Delta P-MERS/S1. Following generation of RV Delta P-MERS/S1 and RV Delta P, our analysis revealed that they shared similar growth properties, with the expression of S1 in RV Delta P-MERS/S1-infected cells confirmed by immunofluorescence and western blot, and the immunogenicity and pathogenicity evaluated using mouse infection experiments. We observed no rabies-associated signs or symptoms in mice inoculated with RV Delta P-MERS/S1. Moreover, virus-specific neutralizing antibodies against both MERS-CoV and RV were induced in mice inoculated intraperitoneally with RV Delta P-MERS/S1. These findings indicate that RV Delta P-MERS/S1 is a promising and safe bivalent-vaccine candidate against both MERS-CoV and RV.
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