Protective immunity against nervous necrosis virus in convict grouper Epinephelus septemfasciatus following vaccination with virus-like particles produced in yeast Saccharomyces cerevisiae

Veterinary Microbiology
Ga Ram WiH J Kim

Abstract

Infection with nervous necrosis virus (NNV) causes viral nervous necrosis, which inflicts serious economic losses in marine fish cultivation. Virus-like particles (VLPs) are protein complexes consisting of recombinant virus capsid proteins, whose shapes are similar to native virions. VLPs are considered a novel vaccine platform because they are not infectious and have the ability to induce neutralizing antibodies efficiently. However, there have been few studies of protective immune responses employing virus challenge following immunization with NNV VLPs, and this is important for evaluating the utility of the vaccine. In the present study, we produced red-spotted grouper (Epinephelus akaara) NNV (RGNNV) VLPs in Saccharomyces cerevisiae and investigated protective immune responses in convict grouper (Epinephelus septemfasciatus) following intraperitoneal injection and oral immunization with the RGNNV VLPs. The parenterally administered VLPs elicited neutralizing antibody with high efficacy, and provided the fish with full protection against RGNNV challenge: 100% of the immunized fish survived compared with only 37% of the control fish receiving phosphate-buffered saline. RGNNV VLPs administered orally provoked neutralizing anti...Continue Reading

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Citations

Mar 29, 2016·Developmental and Comparative Immunology·Carmen W E Embregts, Maria Forlenza
Jan 23, 2019·FEMS Yeast Research·Ravinder Kumar, Piyush Kumar
Feb 14, 2020·Pathogens·Isabel Bandín, Sandra Souto
Jun 25, 2021·International Immunopharmacology·Hamid MotamediRamin Abiri

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