RIPK1对于人类细胞中由疹简单病毒引发的ZBP1-依赖性亡是必不可少的
Oluwamuyiwa T Amusan1, Shuqi Wang1, Chaoran Yin2
1Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA 71130, USA.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
主体防御蛋白质Z-核酸结合蛋白-1 (ZBP1) 触发了亡. 人类细胞需要RIPK1来形成ZBP1-RIPK3复合体,与小鼠不同,突出了病毒防御机制中的关键物种特异性差异.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 病毒学 病毒学
背景情况:
- 死细胞灭绝,一个被编程的细胞死亡途径,对宿主防御病毒感染至关重要,如疹简单病毒-1 (HSV-1).
- 主体传感器Z-核酸结合蛋白-1 (ZBP1) 启动亡,在小鼠中,它被认为与RIPK3激酶直接复合.
- 人体细胞中ZBP1介导的亡的确切机制,以及潜在的辅助因子的参与,仍然在很大程度上未被描述.
研究的目的:
- 阐明人类细胞中ZBP1诱导的亡的机制.
- 为了确定人类和小鼠细胞之间ZBP1复合体形成的特定物种差异.
- 研究RIPK1和RIPK3在ZBP1介导的亡中的作用.
主要方法:
- 使用了人类和小鼠细胞系.
- 使用共免疫沉试验研究了蛋白质与蛋白质相互作用.
- 采用基因操纵,包括在人类和小鼠序列之间交换RIPK3 RHIM域.
主要成果:
- 人体细胞中ZBP1诱导的亡需要RIPK1.1的存在.
- 在人体细胞中,RIPK1对于形成稳定的ZBP1-RIPK3复合物至关重要.
- 在小鼠细胞中,RIPK1对于ZBP1-RIPK3复合体的形成是不可或缺的.
- RIPK3的RIP同质相互作用动机 (RHIM) 规定了RIPK1.1的这种特定物种要求.
结论:
- 在人类和小鼠细胞之间的ZBP1介导的亡中存在关键的机制差异.
- 在人类中,RIPK1是ZBP1-RIPK3复合体组合的关键辅因子,但在小鼠中并非如此.
- RIPK3的RHIM域是这种特定物种差异的基础,这对人类疾病治疗有影响.
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