Oligochitosan stimulated phagocytic activity of macrophages from blunt snout bream (Megalobrama amblycephala) associated with respiratory burst coupled with nitric oxide production

文献类型： 外文期刊

第一作者： Liu, Lichun

作者： Liu, Lichun;Zhou, Yang;Zhao, Xiaoheng;Wang, Hong;Wang, Li;Yuan, Gailing;Asim, Muhammad;Liu, Xiaoling;Lin, Li;Wang, Weimin;Lin, Li;Wang, Weimin;Lin, Li;Zeng, Lingbing;Lin, Li

作者机构：

关键词： Megalobrama amblycephala;Oligochitosan;Macrophage;Phagocytosis;Respiratory burst;Nitric oxide production

期刊名称：DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY （ 影响因子：3.636； 五年影响因子：3.654 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The immunostimulating effects of oligochitosan have been proven in several fish, however, the mechanisms underlying the stimulation are not characterized. In the present study, the effects of oligochitosan were investigated using macrophages isolated from blunt snout bream (Megalobrama amblycephala). The results showed that the phagocytic activity of the macrophages was enhanced by the addition of oligochitosan in vitro and in vivo. The two of the most important antimicrobial pathways of macrophages, NADPH oxidase and iNOS pathways were included for further studies. The amounts of superoxide anion and the mRNAs of the five subunits of NADPH oxidase genes were significantly enhanced in the oligochitosan-treated macrophages and macrophages isolated from fish fed with feed containing oligochitosan. In addition, the NO production, iNOS activity and iNOS gene expression were all significantly increased in the presence of oligochitosan. Furthermore, the mRNA levels of the TNF-alpha and IL-1 beta were also significantly increased in the macrophages derived from fish fed with oligochitosan. In conclusion, the stimulation effects of oligochitosan on the phagocytic activity of the fish macrophages were associated with respiratory burst coupled with nitric oxide production. (C) 2014 Elsevier Ltd. All rights reserved.

分类号： R392

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