Surface display of spring viremia of carp virus glycoprotein on Lactococcus lactis and its protection efficacy in common carp (Cyprinus carpio L.).

Abstract

Spring viremia of carp virus (SVCV) causes devastating disease in aquaculture, resulting in significant economic impact. To develop an effective means against SVCV infection, a Lactococcus lactis (L.lactis) based subunit vaccine (pNZ-UGA) was developed based on surface displaying of SVCV glycoprotein using anchoring motif of the cA (C terminus of the peptidoglyvsn-binding) domains of AcmA, a major autolysin from L.lactis. The surface expression of SVCV glycoprotein was verified by indirect immunofluorescence assay. The efficacy of the constructed vaccine was further evaluated in common carp. The results showed that the higher levels of specific IgM could be detected in fish vaccinated with pNZ-UGA, compared with that in PBS and L.lactis groups. Immune-related genes including TNF-α, IL-6b, IL-1β, Cxcr 1, Cxca, IFNg2b, I-IFN, and IgM expression in pNZ-UGA group were strongly up-regulated, revealing that robust innate immune response was induced. Notably, the lowest cumulative mortality (13.46%) was observed in fish vaccinated with pNZ-UGA vaccine after SVCV challenge, whereas the cumulative mortality were 100.00% and 92.31% in PBS and L.lactis groups, respectively. This study suggests the potential use of the recombinant L.lactis with surface displaying antigen proteins as effective vaccines against SVCV and other fish virus infection.

• Authors: Chen Zhang, Sheng Guo, Zhao Zhao, Zi-Rao Guo, Rui Ma, Gao-Xue Wang, Bin Zhu
• Journal: Fish & shellfish immunology (Fish Shellfish Immunol) Vol. 104 Pg. 262-268 (Sep 2020) ISSN: 1095-9947 [Electronic] England
• PMID: 32534229 (Publication Type: Journal Article)
• Copyright: Copyright © 2020 Elsevier Ltd. All rights reserved.

Chemical References

• Antibodies, Viral
• Cytokines
• Glycoproteins
• Immunoglobulin M
• Vaccines, Subunit
• Viral Proteins

Topics

• Animals
• Antibodies, Viral (blood, immunology)
• Carps (blood, immunology, virology)
• Cytokines (genetics, immunology)
• Fish Diseases (prevention & control)
• Glycoproteins (immunology)
• Immunoglobulin M (blood, immunology)
• Lactococcus lactis (genetics, immunology)
• Rhabdoviridae (immunology)
• Rhabdoviridae Infections (prevention & control, veterinary)
• Vaccines, Subunit (administration & dosage)
• Viral Proteins (immunology)