PMID- 15450965 OWN - NLM STAT- MEDLINE DCOM- 20041221 LR - 20061115 IS - 1050-4648 (Print) IS - 1050-4648 (Linking) VI - 18 IP - 1 DP - 2005 Jan TI - Protection against Atlantic halibut nodavirus in turbot is induced by recombinant capsid protein vaccination but not following DNA vaccination. PG - 13-29 AB - Fish nodaviruses (betanodaviruses) are small, non-enveloped icosahedral single-stranded positive-sense RNA viruses that can cause viral encephalopathy and retinopathy (VER) in a number of cultured marine teleost species, including Atlantic halibut (Hippoglossus hippoglossus). A recombinant protein vaccine and a DNA vaccine were produced, based on the same capsid-encoding region of the Atlantic halibut nodavirus (AHNV) genome, and tested for protection in juvenile turbot (Scophthalmus maximus). Vaccine efficacy was demonstrated in the fish vaccinated with recombinant capsid protein but not in the DNA-vaccinated fish, despite the fact that in vivo expression of the DNA vaccine-encoded antigen was confirmed by RNA in situ hybridisation and immunohistochemistry. Combined DNA and recombinant vaccine administration did not improve the effect of the latter. Surprisingly, fish vaccinated with 50 microg recombinant protein demonstrated a threefold lower survival rate than the two groups that received 10 microg recombinant protein. Neither the recombinant protein vaccine nor the DNA vaccine induced anti-viral antibodies 9 weeks after immunisation, while antibodies reactive with the recombinant protein were detectable mainly in fish vaccinated with 50 microg recombinant protein. The study also demonstrates evidence of viral replication inside the myocytes of intramuscularly challenged fish. FAU - Sommerset, Ingunn AU - Sommerset I AD - Institute of Marine Research, PO Box 1870 Nordnes, N-5817 Bergen, Norway. ingunn.sommerset@intervet.com FAU - Skern, Rasmus AU - Skern R FAU - Biering, Eirik AU - Biering E FAU - Bleie, Hogne AU - Bleie H FAU - Fiksdal, Ingrid Uglenes AU - Fiksdal IU FAU - Grove, Soren AU - Grove S FAU - Nerland, Audun Helge AU - Nerland AH LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Capsid Proteins) RN - 0 (Vaccines, DNA) RN - 0 (Vaccines, Synthetic) SB - IM MH - Animals MH - Aquaculture MH - Capsid Proteins/*immunology MH - Enzyme-Linked Immunosorbent Assay/veterinary MH - Fish Diseases/*immunology/*prevention & control/virology MH - Flatfishes MH - Immunohistochemistry/veterinary MH - In Situ Hybridization/veterinary MH - Neutralization Tests/veterinary MH - Nodaviridae/*immunology MH - RNA Virus Infections/immunology/prevention & control/*veterinary MH - Reverse Transcriptase Polymerase Chain Reaction/veterinary MH - Time Factors MH - Vaccination/*veterinary MH - Vaccines, DNA/immunology/metabolism MH - Vaccines, Synthetic/immunology EDAT- 2004/09/29 05:00 MHDA- 2004/12/22 09:00 CRDT- 2004/09/29 05:00 PHST- 2004/03/29 00:00 [accepted] PHST- 2004/09/29 05:00 [pubmed] PHST- 2004/12/22 09:00 [medline] PHST- 2004/09/29 05:00 [entrez] AID - S1050464804000191 [pii] AID - 10.1016/j.fsi.2004.03.006 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2005 Jan;18(1):13-29. doi: 10.1016/j.fsi.2004.03.006.