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Expression profile analysis of two cathepsin S in channel catfish (Ictalurus punctatus) mucosal tissues following bacterial challenge

文献类型： 外文期刊

作者： Dong, Xiaoyu 1 ; Ye, Zhi 2 ; Song, Lin 1 ; Su, Baofeng 3 ; Zhao, Honggang 2 ; Peatman, Eric 2 ; Li, Chao 1 ;

作者机构： 1.Qingdao Agr Univ, Marine Sci & Engn Coll, Qingdao 266109, Peoples R China

2.Auburn Univ, Sch Fisheries Aquaculture & Aquat Sci, Auburn, AL 36849 USA

3.Chinese Acad Fishery Sci, Heilongjiang Fisheries Res Inst, Key Lab Freshwater Aquat Biotechnol & Breeding, Minist Agr, Harbin 150070, Peoples R China

关键词： Cathepsin;Catfish;Infection;Mucosal immunity

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

ISSN：

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收录情况： SCI

摘要： Cathepsin S belongs to the papain family of cysteine protease, and is considered to play key roles in immune responses after bacterial challenge. However, despite the recognized importance of Cathepsin S in immunity, no studies have systematically characterized Cathepsin S in catfish. In this regard, here, we characterized the Cathepsin S gene family in channel catfish, and investigated their expression patterns following two different Gram-negative bacterial challenge. In the present study, two Cathepsin S genes (ass and ctssa) were captured in channel catfish. In comparison to other species, the catfish Cathepsin S genes are highly conserved in their structural features. Phylogenetic analysis indicated the strongest phylogenetic relationship with zebrafish, which is consistent with their evolutional relationships. Tissue distribution analysis revealed that Cathepsin S genes were ubiquitously expressed in catfish tissues. Following bacterial infection, the Cathepsin S genes were significantly up-regulated at most time-points in mucosal surfaces, with an acute response post Edwardsiella ictaluri infection. Obviously, the expression profiles were quite distinct between two Cathepsin S genes, across the tissues and between pathogens, suggesting that Cathepsin S genes may exert disparate roles in mucosal immune responses. Our findings here, provide early insight into the immune functions of Cathepsin S in catfish; however, further studies are needed to determine the mechanisms of Cathepsin S for antigen presentation during inflammatory processes and innate host defense. (C) 2015 Elsevier Ltd. All rights reserved.

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