Establishment and characterization of a mid-kidney cell line derived from golden pompano Trachinotus ovatus, a new cell model for virus pathogenesis and toxicology studies

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Abstract

Golden pompano Trachinotus ovatus, a popularly cultured and commercially important marine fish worldwide, has been recognized as a promising candidate for mariculture. However, outbreaks of infectious bacterial or viral diseases and environmental deterioration have led to great economic losses in T. ovatus aquaculture recently. In our research, we established a new mid-kidney cell line, designated as TOK, from golden pompano, T. ovatus. The optimized growth temperature and working concentration of fetal bovine serum (FBS) were 28°C and 10–20%, respectively. Foreign genes could express well in TOK cells. The modal number of TOK cells was 54. The TOK cells were susceptive to Singapore grouper iridovirus (SGIV) and red-spotted grouper nervous necrosis virus (RGNNV), and the virus could propagate in cells. Propagation was verified by qRT-PCR, and virions were observed under electron microscopy. Cytotoxicity analysis revealed that TOK cells were sensitive to different concentrations of extracellular products (ECPs) from Vibrio alginolyticus and V. anguillarum. Moreover, heavy metals (Cd, Cu, and Hg) also showed dose-dependent cytotoxicity to the TOK cell line. We established a mid-kidney cell line from T. ovatus which could be applied to cytotoxicity assays of heavy metals. The newly established TOK cell line possesses great application potential in genetic manipulation, virus–host interaction studies, and toxicity assays of bacterial extracellular products and heavy metals.

Keywords

Trachinotus ovatus Mid-kidney cell line Cytotoxicity Nervous necrosis virus Heavy metals 

Notes

Acknowledgements

The research was financially supported by the National Natural Science Foundation of China (31330082, 314611630087), the National Basic Research Program of China (973) (2012CB114402), and the Science and Technology and Industrial Development Marine Fishery Project of Guangdong Province, China (A201501C01).

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Copyright information

© The Society for In Vitro Biology 2016

Authors and Affiliations

  • Lingli Zhou
    • 1
    • 3
  • Pengfei Li
    • 2
    • 3
  • Jiaxin Liu
    • 1
    • 3
  • Songwei Ni
    • 1
    • 3
  • Yepin Yu
    • 1
    • 3
  • Min Yang
    • 1
  • Shina Wei
    • 1
  • Qiwei Qin
    • 1
    • 4
  1. 1.Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina
  2. 2.Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynethesis ChemistryGuangxi Academy of SciencesNanningChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.College of Marine SciencesSouth China Agricultural UniversityGuangzhouChina

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