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Identification and Expression Profiles of IL-8 in Bighead Carp (Aristichthys nobilis) in Response to Microcystin-LR

机译:cyst鱼对微囊藻毒素-LR应答中IL-8的鉴定和表达谱

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摘要

Microcystin-LR (MCLR) is a widespread cyanotoxin and has immunotoxicity to animals, including fish. Chemokines are considered to play important roles in inflammatory response induced by MCLR. In this study, we cloned the full-length cDNA of interleukin-8 (IL-8) from bighead carp (Aristichthys nobilis) for the first time. The full-length IL-8 cDNA was 552 bp and contained a 297-bp open-reading frame that encoded for a 98-amino acid protein. The deduced IL-8 protein had a typical aspartic acid (D)-leucine (L)-arginine (R) and a CXC motif at the N-terminal, which were conserved in most fish species. Phylogenetic analysis showed that bighead carp IL-8 protein was grouped in the teleost IL-8 lineage 2. Under normal conditions, the expression of IL-8 is constitutive and weak in all tested tissues. However, MCLR treatment could significantly increase the transcription of IL-8 in bighead carp in a temporal- and dose-dependent pattern. The present study will help us to understand more about the evolution of IL-8 and its function in the MCLR induced proinflammatory response in bighead carp.
机译:微囊藻毒素-LR(MCLR)是一种广泛的氰毒素,对动物(包括鱼类)具有免疫毒性。趋化因子被认为在MCLR引起的炎症反应中起重要作用。在这项研究中,我们第一次从big鱼(Aristichthys nobilis)克隆了白介素8(IL-8)的全长cDNA。 IL-8全长552 bp,包含一个297 bp的开放阅读框,可编码98个氨基酸的蛋白质。推导的IL-8蛋白在N末端具有典型的天冬氨酸(D)-亮氨酸(L)-精氨酸(R)和CXC基序,在大多数鱼类中都是保守的。系统发育分析表明big鱼IL-8蛋白属于硬骨鱼IL-8谱系2。在正常情况下,IL-8的表达在所有测试组织中均为组成型且较弱。但是,MCLR处理可能以时间和剂量依赖性方式显着增加big鱼中IL-8的转录。本研究将帮助我们更多地了解IL-8的进化及其在MCLR诱导big鱼促炎反应中的功能。

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