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cIAPs控制RIPK1激酶活动依赖和独立的细胞死亡和组织炎症
Fabian Schorn1, J Paul Werthenbach1, Mattes Hoffmann1
1Faculty of Medicine and University Hospital of Cologne, Institute for Molecular Immunology, University of Cologne, Cologne, Germany.
The EMBO journal
|October 4, 2023
概括
细胞亡抑制蛋白 (cIAP) 通过使RIPK1.1无处不在来调节TNF信号传递. 不活跃的cIAP1/2和RIPK1突变小鼠显示了cIAP对TNFR1毒性的控制,独立于RIPK1和RIPK3,为治疗研究提供了一个新的模型.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞死亡途径 细胞死亡途径
背景情况:
- 细胞亡抑制蛋白 (cIAP) 是E3泛素连接酶,对于调节TNF信号传递至关重要.
- cIAPs无处不在的受体相互作用蛋白激酶1 (RIPK1),这是TNF诱导的细胞死亡的关键媒介.
- 对TNF信号的失调与各种炎症性疾病有关.
研究的目的:
- 研究cIAP在TNF信号传递和细胞死亡中的作用.
- 建立一个新的小鼠模型来研究cIAP功能.
- 在体内阐明cIAPs,RIPK1,RIPK3和TNFR1之间的相互作用.
主要方法:
- 产生具有酶不活性cIAP1/2变体 (cIAP1/2MutR) 的小鼠.
- 创建复合突变小鼠,包括Ripk1D138N和Tnfr1淘汰赛.
- 对突变小鼠的表型分析,重点关注胚胎发育,生存和全身炎症.
主要成果:
- cIap1/2MutR/MutR小鼠由于RIPK1-介导的亡而表现出胚胎致死性.
- 基因酶非活性RIPK1部分挽救了发育,但Ripk1D138N/D138N /cIap1/2MutR/MutR小鼠显示了与全身炎症的断奶后死亡率.
- 由于TNFR1缺乏,可以预防炎症和死亡,这表明cIAP可以独立于RIPK1和RIPK3调节TNFR1中介毒性.
结论:
- 通过部分独立于RIPK1激酶活性的机制,cIAP在预防TNF诱导的毒性方面发挥着关键作用.
- TNFR1信号传递是cIAP通过其对系统性炎症施加保护作用的关键途径.
- 开发的小鼠模型为研究TNF信号传递和评估针对TNF,cIAPs和RIPK1.1的治疗提供了有价值的工具.
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