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  • Title: The in vivo roles of galectin-2 from Nile tilapia (Oreochromis niloticus) in immune response against bacterial infection.
    Author: Niu J, Liu X, Zhang Z, Huang Y, Tang J, Wang B, Lu Y, Cai J, Jian J.
    Journal: Fish Shellfish Immunol; 2020 Nov; 106():473-479. PubMed ID: 32805415.
    Abstract:
    Our previous study has recorded that the recombinant protein of Nile tilapia (Oreochromis niloticus) galectin-2 (rOnGal-2) can enhance immune response against Streptococcus agalactiae (S.agalactiae) infection in vitro. In this study, we further explored the effects of OnGal-2 in immune response against bacterial infection in vivo. The administration of rOnGal-2 could improve serum antibacterial activity (ALKP, ACP, and LZM) and antioxidant capacity (CAT, POD, and SOD). After S. agalactiae infection, rOnGal-2 injection could reduce bacterial burden and decrease tissue damage in head kidney, spleen, and liver of tilapia. Also, rOnGal-2 regulated the inflammatory-related genes expression including IL-6, IL-8 and IL-10 during bacterial infection. Furthermore, rOnGal-2 administration could increase the relative percentage survival of tilapia infected with S.agalactiae. Taken together, our results indicate that OnGal-2 can protect fish from bacterial infection through reducing bacterial burden, impairing tissue damage and modulating anti-bacterial immune response, which also can be applied as a potential vaccine adjuvant in O.niloticus culture.
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