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Tyrosinase, a new innate humoral immune parameter in large yellow croaker (Pseudosciaena crocea R)

Chinese Journal of Oceanology and Limnology, ISSN: 0254-4059, Vol: 27, Issue: 3, Page: 527-535
2009
  • 1
    Citations
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  • 11
    Captures
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Metrics Details

  • Citations
    1
    • Citation Indexes
      1
  • Captures
    11

Article Description

We evaluated the immune response to infection with a pathogen in large yellow croaker (Pseudosciaena crocea Richardson). The fish were given an intraperitoneal (i.p.) injection of Vibrio parahaemolyticus or sterile sea water (control). We collected blood sera from the fish 0.17, 1, 2, 4, 8, 12, or 16 d after injection (dpi). We measured tyrosinase activity and the concentrations of lysozyme, NOS, and antibodies. Serum tyrosinase activity was significantly higher at 0.17 and 4 dpi than in the control group, and peaked at 8 dpi. Lysozyme activity was significantly higher at 2 and 12 dpi than in the control group, but lower at 16 dpi. There is no statistical difference in the level of nitric oxides synthase (NOS) activity or antibodies between the control and injection groups. This is the first report of the tyrosinase activity in the serum of large yellow croaker. Our results indicate that tyrosinase plays an important role in the immediate immune defense against V. parahaemolyticus in large yellow croaker. Tyrosinase is a candidate parameter for investigation of fish innate immune defense. © 2009 Chinese Society for Oceanology and Limnology, Science Press and Springer Berlin Heidelberg.

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