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Aquaculture International

, Volume 26, Issue 6, pp 1401–1413 | Cite as

Evaluation of interferon gamma (IFN-γ) of Labeo rohita as an immunomodulator: in vitro expression model

  • Megha Kadam Bedekar
  • Praveena Soman
  • Sajal Kole
  • Deepika Anand
  • Gayatri Tripathi
  • M. Makesh
  • K. V. Rajendran
Article
  • 38 Downloads

Abstract

Interferon gamma (IFN-γ) or type II interferon is a cytokine that is critical for innate and adaptive immunity against viral and some bacterial and protozoal infections. The importance of IFN-γ in the immune system lies in its ability to inhibit viral replication directly and most importantly from its immunomodulatory effects. Previously, we successfully co-administered IFN-γ along with GAPDH gene of Edwardsiella tarda as bicistronic DNA vaccine in Labeo rohita. In order to ascertain the individual role of IFN-γ, the present study involves cloning and expression of 552-bp IFN-γ open-reading frame (ORF) of L. rohita in striped snakehead (SSN-1) cell line using eukaryotic expression vector system (pQE-TriSystem) followed by transfection in peripheral blood lymphocytes (PBMCs) to evaluate its immunomodulatory ability in comparison to polyinosinic-polycytidylic acid (Poly I:C)-treated PBMCs. The 18.7-kDa protein, expressed in the pQE-IFNγ-transfected SSN-1 cells, reacted with anti-His antibody in Western blot confirming it to be recombinant IFN-γ, whereas the relative expression of IFN-γ, iNOS, Mx, and IL-1β genes in PBMCs was quantified at 24 h and 48 h post treatment by qPCR. The comparative kinetics of all four genes showed significantly (p < 0.05) high upregulation pattern in both pQE-IFNγ-transfected cell group and Poly I:C-treated cell group demonstrating recombinant IFN-γ as an equally efficient inducer like Poly I:C. Thus, our in vitro experiment results highlight the immunomodulatory potential of recombinant IFN-γ as an analogue to synthetic Poly I:C which warranted future studies to further explore the potential of recombinant IFN-γ as an effective vaccine adjuvant against different microbial invasion.

Keywords

IFN-γ Labeo rohita Peripheral blood mononuclear cells Poly I:C 

Notes

Acknowledgements

The authors thank the present Director Dr. Gopal Krishna and Ex-Director Dr. W S Lakra, ICAR-Central Institute of Fisheries Education, Mumbai, India, for providing necessary facilities and support for this study.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Megha Kadam Bedekar
    • 1
  • Praveena Soman
    • 1
  • Sajal Kole
    • 1
    • 2
  • Deepika Anand
    • 1
  • Gayatri Tripathi
    • 1
  • M. Makesh
    • 3
  • K. V. Rajendran
    • 1
  1. 1.ICAR-Central Institute of Fisheries EducationMumbaiIndia
  2. 2.Department of Aqualife MedicineChonnam National UniversityGwangjuRepublic of Korea
  3. 3.ICAR-Central Institute of Brackishwater AquacultureChennaiIndia

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