IL-27 suppresses spring viremia of carp virus replication in zebrafish

Fish Shellfish Immunol. 2023 Feb:133:108530. doi: 10.1016/j.fsi.2023.108530. Epub 2023 Jan 9.

Abstract

Interleukin (IL) 27 is a member of the IL-12 family and is a heterodimeric cytokine composed of IL-27A and Epstein-Barr virus-induced 3 (EBI3). It plays an important role in regulating inflammation and cancer progression. IL-27A not only functions by dimerizing with EBI3 but also acts alone. Here, we report that IL-27A and EBI3 suppress spring viremia of carp virus (SVCV) replication in zebrafish. Expression analysis reveals that il-27a and ebi3 were significantly upregulated in the ZF4 cells by SVCV and poly(I:C), and in the zebrafish caudal fin (ZFIN) cells overexpressed with SVCV genes. Interestingly, il-27a and ebi3 were not modulated by IFNφ1, indicating that they are not IFN stimulated genes (ISGs). Furthermore, overexpression of IL-27A and EBI3 alone inhibited SVCV replication in the EPC cells, but less potent than co-expression of IL-27A and EBI3. Intriguingly, IL-27A could not induce the expression of irf3, ifn, isg15 and mx1. Taken together, our results demonstrate that IL-27A and EBI3 activate innate antiviral response in an IFN independent manner in zebrafish.

Keywords: Antiviral response; EBI3; Interleukin-27A; SVCV; Zebrafish.

MeSH terms

  • Animals
  • Epstein-Barr Virus Infections
  • Fish Diseases*
  • Fish Proteins / genetics
  • Fish Proteins / metabolism
  • Herpesvirus 4, Human / metabolism
  • Interleukin-27* / genetics
  • Interleukins / genetics
  • Rhabdoviridae Infections* / veterinary
  • Rhabdoviridae* / physiology
  • Viremia
  • Virus Replication
  • Zebrafish* / genetics
  • Zebrafish* / metabolism

Substances

  • Fish Proteins
  • Interleukin-27
  • Interleukins

Supplementary concepts

  • Carp sprivivirus