RIPK3协调神经元中的RHIM域依赖性抗病毒炎症转录
Sigal B Kofman1, Lan H Chu1, Joshua M Ames1
1Department of Immunology, University of Washington, Seattle, WA 98109, USA.
Science signaling
|April 1, 2025
概括
神经元中的受体相互作用蛋白激酶3 (RIPK3) 激活在寨卡病毒感染期间促进抗病毒基因转录,而不是细胞死亡. 这与其在纤维细胞中诱导细胞死亡的作用形成鲜明对比,突出显示了RIPK3.
科学领域:
- 神经免疫学 神经免疫学
- 细胞免疫学 细胞免疫学
- 病毒学 病毒学
背景情况:
- 神经元具有独特的免疫反应,抵御像死细胞灭绝这样的编程细胞死亡.
- 之前的研究已经确定了RIPK3在抗病毒防御中的死细胞灭绝独立作用.
- 在神经元和非神经元细胞之间,RIPK3的功能可能有所不同.
研究的目的:
- 在寨卡病毒 (ZIKV) 感染期间调查RIPK3激活在初级神经元与纤维细胞中的不同作用.
- 阐明RIPK3在神经元抗病毒反应中的功能背后的机制.
- 在不同细胞类型中比较RIPK3依赖的转录程序.
主要方法:
- 主皮层神经元和小鼠胚胎纤维细胞 (MEF) 培养.
- 寨卡病毒 (ZIKV) 感染和无菌激活模型.
- 对RIPK3激活,细胞死亡和基因转录的分析.
- 对RIPK3下游效应因子的基因切除.
主要成果:
- 神经元中的RIPK3激活并没有导致细胞死亡,但在ZIKV感染期间诱导了抗病毒基因转录.
- 相比之下,MEF中RIPK3的激活导致细胞死亡.
- 在MEF中消灭细胞死亡因子揭示了一个RIPK3依赖的转录程序,类似于ZIKV感染的神经元中的转录程序.
- 在抗死亡MEF中,RIPK3依赖转录需要RIPK1和TRIF,类似于神经元.
结论:
- RIPK3 呈现出上下文依赖的多变性功能.
- 在抗死亡的细胞类型中,RIPK3调解炎症和抗病毒转录.
- 在神经元抗病毒防御中,RIPK3的作用主要是转录性的,而不是细胞毒性的.
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