1
Laboratory of Infectious Diseases, College of Veterinary Medicine, Chungnam National University, Yusung, Taejon, Korea
2
Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yusung, Taejon, Korea
Correspondence should be addressed to Chul-Joong Kim cjkim@cnu.ac.krSalmonellasurface displaymultivalent mucosal vaccine
We have developed a recombinant live oral vaccine using the ice-nucleation protein (Inp) from Pseudomonas syringae to display viral antigens on the surface of Salmonella spp. Fusion proteins containing viral antigens were expressed in the oral vaccine strain, Salmonella typhi Ty21a. Surface localization was verified by immunoblotting and fluorescence-activated cell sorting. The immunogenicity of surface-displayed viral antigens on the recombinant live vaccine strain was assessed in mice inoculated intranasally and intraperitoneally. Inoculation resulted in significantly higher serum antibody level than those induced by viral antigens expressed intracellularly. Thus, this multivalent mucosal live vaccine may provide an effective means for inducing mucosal or systemic immune responses against multiple viral antigens.
