Immunological characterization and expression of lily-type lectin in response to environmental stress in turbot (Scophthalmus maximus)
文献类型： 外文期刊
作者： Huang, Zhihui 1 ; Ma, Aijun 1 ; Xia, Dandan 1 ; Wang, Xinan 1 ; Sun, Zhibin 1 ; Shang, Xiaomei 1 ; Yang, Zhi 4 ; Qu, Jian 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Marine Fisheries, Minist Agr,Qingdao Key Lab Marine Fish Breeding &, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
3.Ocean Univ Shanghai, Shanghai 201306, Peoples R China
4.Yantai Tianyuan Aquat Ltd Corp, Yantai 264003, Peoples R China
关键词： Lily-type lectins; Haemagglutinate; Environmental stressors; Anti-Ciliate activity; Turbot
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）
ISSN： 1050-4648
年卷期： 2016 年 58 卷
页码：
收录情况： SCI
摘要： Lectins are a superfamily of carbohydrate-binding proteins that are widely distributed throughout living organisms. In earlier work, we identified lily-type lectin (SmLTL) in the skin mucus of turbot Scophthalmus maximus, and we characterized the protein in the present study. Results from qRT-PCR indicated that SmLTL was expressed highly in skin, intestine and gill tissue. Changes in SmLTL expression occurred in these tissues in response to environmental stressors including ciliate infection, high temperature and salinity. Recombinant SmLTL purified from Escherichia coli was able to haemagglutinate mouse erythrocytes in the absence of calcium, and was inhibited by D-mannose. In addition, SmLTL displayed selective binding to bacterial species including Edwardsiella tarda and Vibrio anguillarum, and exhibited toxicity towards Philasterides dicentrarchi, with a mortality of over 60% after 24 h at a concentration of only 100 mu gml(-1). To investigate this toxicity further, we measured binding of SmLTL after incubating the ciliate in FITC-SmLTL solution. Surface fluorescence decreased substantially in the presence of 400 mM Dmannose. Together these results suggest that lily-type lectins serve as the first line of defence against microbial attack and play a pivotal role in the mucosal immune system. (C) 2016 Elsevier Ltd. All rights reserved.
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