在黑鱼的抗病毒天生的免疫力中,STAT2负面调节RIG-I
Ji Liu1, Chushan Dai2, Lijun Yin2
1State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China; College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China.
Fish & shellfish immunology
|March 23, 2024
概括
黑鱼的STAT2通过抑制RIG-I无化来负面调节抗病毒免疫力. 这项研究揭示了脊椎动物先天免疫的新型机制,影响了模式识别受体信号传递.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 信号转换器和转录2激活器 (STAT2) 对于细胞抗病毒反应至关重要.
- 在干扰素 (IFN) 信号传递和模式识别受体 (PRR) 途径中,STAT2的上游调节作用基本上是未知的.
研究的目的:
- 从黑鱼 (bcSTAT2) 中克隆和鉴定STAT2同类的特征.
- 研究bcSTAT2在IFN诱导中的功能,抗病毒活性及其与RIG-I的相互作用.
主要方法:
- 黑 STAT2 (bcSTAT2) 的克隆和特征.
- 双露西法酶记者测定和斑块测定以评估IFN诱导和抗病毒活动.
- 同免疫沉 (co-IP) 和免疫阻塞 (IB) 试验用于研究蛋白质相互作用和无处不在.
主要成果:
- bcSTAT2与哺乳动物STAT2共享保存的结构特征,并表现出IFN诱导和抗病毒特性.
- bcSTAT2与bcRIG-I结合,抑制bcRIG-I介导的IFN表达和抗病毒活性.
- bcSTAT2 特别抑制bcRIG-I的K63结合的多基化,而不会影响K48结合的多基化或寡合化.
结论:
- 黑鱼STAT2通过减弱其K63链接的无处可见性来负面调节RIG-I信号.
- 这一发现为对脊椎动物抗病毒天生的免疫级联的调节提供了新的见解.
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