Antimicrobial activity of mannose binding lectin in grass carp (Ctenopharyngodon idella) in vivo and in vitro.

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ID: 80561
2020
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Abstract
Mannose-binding lectin (MBL) is a crucial pattern recognition receptor in the host innate immune system. Previously, we reported the biological function of Ctenopharyngodon idella MBL (CiMBL) in initiating the lectin pathway of the complement system. In the present study, we further explored its biological function including the agglutinating ability, binding capacity and protective role in vitro and in vivo. After Aeromonas hydrophila infection, western blot analysis revealed that the CiMBL were fluctuated and expressed in the serum and major immune-related tissues. The result of quantitative PCR (qPCR) showed that the recombinant CiMBL (rCiMBL) significantly inhibited the mRNA expression of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in liver, spleen and hepatic cells. Due to rCiMBL bound to d-mannose, d-galactose, d-glucose, N-acetyl-d-glucosamine (GlcNAc), lipopolysaccharide (LPS), peptidoglycan (PGN) and Agar in the presence of Ca, herein gram-positive (Staphylococcus aureus and Micrococcus luteus) and gram-negative (A. hydrophila and Vibrio anguillarum) bacteria were agglutinated by rCiMBL in a Ca-dependent manner. More importantly, rCiMBL enhanced the survival rate of grass carp following bacterial infection. Overall, the results provide an evidence that CiMBL can protect grass carp against A. hydrophila infection in aquaculture.
Reference Key
liu2020antimicrobialfish Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Liu, Lei;Dang, Yunfei;
Journal fish & shellfish immunology
Year 2020
DOI
S1050-4648(19)31227-6
URL
Keywords
grass carp aeromonas hydrophila agglutination activity binding capacity mbl

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