Fisheries and Aquatic Sciences

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Isolation and expression analysis of stimulator of interferon gene from olive flounder, Paralichthys olivaceus

  • Ma, Jeong-In (Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University) ;
  • Kang, Sunhye (Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University) ;
  • Jeong, Hyung-Bok (Fish Vaccine Research Center, Jeju National University) ;
  • Lee, Jehee (Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University)
  • Received : 2017.11.01
  • Accepted : 2018.01.10
  • Published : 2018.03.31
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Abstract

Stimulator of interferon gene (STING) is induced by various inflammatory agents, such as lipopolysaccharide and microbial pathogens, including virus and bacteria. In this study, we obtained a full-length cDNA of a STING homolog from olive flounder using rapid amplification of cDNA ends PCR technique. The full-length cDNA of Paralichthys olivaceus STING (PoSTING) was 1442 bp in length and contained a 1209-bp open reading frame that translated into 402 amino acids. The theoretical molecular mass of the predicted protein sequence was 45.09 kDa. In the PoSTING protein, three transmembrane domains and the STING superfamily domain were identified as characteristic features. Quantitative real-time PCR revealed that PoSTING expressed in all the tissues analyzed, but showed the highest level in the spleen. Temporal expression analysis examined the significantly upregulated expression of PoSTING mRNA after viral hemorrhagic septicemia virus (VHSV) stimulation. In contrast, no significant changes in the PoSTING expression were detected in Edwardsiella tarda-challenged group compared to the un-injected control. The expression of P. olivaceus type I interferon (PoIFN-I) was also highly upregulated upon VHSV challenge. These results suggest that STING might be involved in the essential immune defense against viral infection together with the activation of IFN-I in olive flounder.

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References

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