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在黑鱼中,SENP2负面调节RIG-I/MDA5介导的先天免疫力

Yixia Chen¹, Jun Li², Jiaxin Fu¹

¹State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China.

Fish & shellfish immunology

|December 26, 2024

概括

黑鱼SUMO特异性酶2 (SENP2) 通过降解MDA5和RIG-I蛋白质来抑制抗病毒信号传递. 抑制bcSENP2可以增强鱼类的抗病毒抵抗力.

科学领域:

水生免疫学水生免疫学
分子生物学分子生物学
鱼类病毒学鱼类病毒学

背景情况:

SUMO特异性酶2 (SENP2) 对于哺乳动物的免疫反应至关重要.
在远鱼免疫力中SENP2的作用在很大程度上是未知的.
黑鱼 (Mylopharyngodon piceus) 是一个重要的水产养殖物种.

研究的目的:

为了克隆和表征黑鱼SENP2 (bcSENP2).
为了研究bcSENP2在抗病毒免疫中的功能.
阐明bcSENP2影响抗病毒信号通路的机制.

主要方法:

基因克隆和bcSENP2.2.的基因测序
报告员测试以评估干扰素 (IFN) 促进剂活性.
同免疫沉检测蛋白质相互作用.
对抗病毒活性进行斑块分析和定量PCR (qPCR).
西方涂抹分析蛋白质表达水平.

主要成果:

bcSENP2表达显著降低了MDA5/RIG-I介导的IFN促进剂活性.
bcSENP2直接与黑鱼MDA5 (bcMDA5) 和RIG-I (bcRIG-I) 进行相互作用.
过度表达bcSENP2减弱了抗病毒能力,而其降低则增强了对SVCV的抵抗力.
bcSENP2通过ubiquitin-proteasome通路促进了bcMDA5 / bcRIG-I蛋白质的降解.

结论:

黑鱼SENP2 (bcSENP2) 负面调节抗病毒免疫力.
bcSENP2通过促进蛋白质降解来抑制MDA5/RIG-I介导的抗病毒信号传递.
这项研究揭示了一种涉及SENP2.2的鱼类免疫逃避的新机制.

关键词:

黑鱼是一种黑鱼.这是天生的免疫力.MDA5 MDA5 MDA5 的意思是什么意思在RIG-I中,RIG-I是指RIG-I.这就是SENP2的意义.

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