Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
권호 표지

Comparison of immunogenecities of three beta-nodavirus proteins, capsid protein, non-structural protein B1 and B2 in olive flounder

  • Cha, Seung-Ju (Pathology Division, National Fisheries Research & Development Institute) ;
  • Do, Jeong-Wan (Pathology Division, National Fisheries Research & Development Institute) ;
  • Ko, Myoung-Seok (Department of Biological Sciences, University of Ulsan) ;
  • Kim, Jin-Woo (Pathology Division, National Fisheries Research & Development Institute) ;
  • Park, Jeong-Woo (Department of Biological Sciences, University of Ulsan)
  • Published : 2009.12.01
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Abstract

The genomic and subgenomic RNAs of fish nodavirus encode the four proteins, protein A, capsid protein, non-structural protein B1 and B2. In this study, we describe the immune response of olive flounder Paralichthys olivaceus immunized with live fish nodavirus or recombinant capsid protein, non-structural protein B1 and B2 expressed in E. coli. Nodavirus-infected flounder produced antibodies to capsid protein, B1 and B2 and nodavirus-neutralizing activities were detected in the serum of the nodavirus-infected flounder. The flounder were immunized against the three recombinant proteins of fish nodavirus and the sera from these immunized fishes were assayed for nodavirus-specific antibody by ELISA and a neutralization test. In the immunized flounder, all three recombinant proteins induced the production of similar levels of antibody, but only the antibody to capsid protein significantly neutralized nodavirus. These results indicate that all three nodaviral proteins are immunogenic in flounder, but only the capsid protein can induce neutralizing antibody against nodavirus.

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