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Induction of a protective immune response against viral nervous necrosis in the european sea bass dicentrarchus labrax by using betanodavirus virus-like particles

Academic Article
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Overview

authors

  • Thiery, R.
  • Cozien, J.
  • Cabon, J.
  • Lamour, F.
  • Baud, M.
  • Schneemann, Anette

publication date

  • October 2006

journal

  • Journal of Virology  Journal

abstract

  • Betanodaviruses are causative agents of viral nervous necrosis (VNN), a devastating disease of cultured marine fish worldwide. Virus particles contain a single type of coat protein that spontaneously assembles into virus-like particles (VLPs) when expressed in a baculovirus expression system. In the present study, the immunogenicity of betanodavirus VLPs and the protection they confer against VNN in the European sea bass Dicentrarchus labrax were investigated. Enzyme-linked immunosorbent assay and seroneutralization tests performed on plasma from fish vaccinated intramuscularly with doses as low as 0.1 microg of VLPs indicated that the VLPs elicited the synthesis of specific antibetanodavirus antibodies with neutralizing activity. Moreover, fish vaccinated with VLPs were protected from challenge with live virus. Both the immune response and the protective effect against viral challenge were dose dependent. Reverse transcription-PCR data indicated that higher doses of vaccine also reduced the number of fish containing detectable quantities of betanodavirus RNA on day 30 after challenge. Taken together these data strongly support the hypothesis that VLPs obtained in the baculovirus expression system may represent an effective vaccine against VNN.

subject areas

  • Animals
  • Antibodies, Viral
  • Bass
  • Central Nervous System Viral Diseases
  • Disease Models, Animal
  • Dose-Response Relationship, Immunologic
  • Enzyme-Linked Immunosorbent Assay
  • Fish Diseases
  • Neutralization Tests
  • Nodaviridae
  • RNA Virus Infections
  • RNA, Viral
  • Reverse Transcriptase Polymerase Chain Reaction
  • Survival Analysis
  • Virosomes
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Identity

International Standard Serial Number (ISSN)

  • 0022-538X

Digital Object Identifier (DOI)

  • 10.1128/jvi.01098-06

PubMed ID

  • 17005697
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Additional Document Info

start page

  • 10201

end page

  • 10207

volume

  • 80

issue

  • 20

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