Protective efficacy of Streptococcus iniae derived enolase against Streptococcal infection in a zebrafish model

Vet Immunol Immunopathol. 2016 Feb:170:25-9. doi: 10.1016/j.vetimm.2016.01.004. Epub 2016 Jan 15.

Abstract

Enolase (ENO) is one of the surface-exposed proteins of Streptococcus iniae, which previously had been identified as a plasminogen-binding protein. In this study, ENO was evaluated to induce cross-protective immunity against S. iniae and Streptococcus parauberis which are major pathogens causing streptococcosis in fish. Immunoblot analysis shows that S. iniae recombinant ENO (rENO) produced in Escherichia coli was cross-reactive with antisera against S. iniae, and S. parauberis serotype I and II. In the challenge experiment of streptococcal infection after vaccination in zebrafish, rENO elicited a similar protection with a whole cell bacterin against S. iniae and S. parauberis, which suggests its feasibility as an efficient vaccine against streptococcosis.

Keywords: Streptococcus iniae; Streptococcus parauberis; Subunit vaccine; Zebrafish; α-Enolase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Bacterial Proteins / immunology*
  • Disease Models, Animal
  • Fish Diseases / immunology
  • Fish Diseases / prevention & control*
  • Phosphopyruvate Hydratase / immunology*
  • Streptococcal Infections / immunology
  • Streptococcal Infections / prevention & control*
  • Streptococcal Vaccines / immunology*
  • Vaccines, Synthetic / immunology
  • Zebrafish

Substances

  • Bacterial Proteins
  • Streptococcal Vaccines
  • Vaccines, Synthetic
  • Phosphopyruvate Hydratase