通过降解微质中的c/EBPβ抑制神经炎症
Ada Ndoja1, Rohit Reja2, Seung-Hye Lee3
1Department of Physiological Chemistry, Genentech, South San Francisco, CA 94080, USA.
Cell
|August 16, 2020
概括
COP1通常抑制微质中有害的基因活动, 它的缺失导致c/EBPβ的积累,恶化神经炎症和tau病理.
科学领域:
- 神经科学
- 免疫学
- 遗传学
背景情况:
- 在神经退行性疾病,如阿尔茨海默氏症 (AD) 中,
- 转录因子CCAAT/增强剂结合蛋白β (c/EBPβ) 促进微质中的炎症,并且在AD中升高.
- 控制有害微质基因表达的机制尚未完全理解.
研究的目的:
- 调查在微质基因表达调节中的泛素酶COP1 (RFWD2) 的作用,特别关注c/EBPβ.
- 确定COP1缺乏对微质炎症反应和神经毒性的影响.
- 阐明COP1在神经退化中的作用.
主要方法:
- 在微质中检查了COP1对c/EBPβ的翻译后调节.
- 用微神经元共同培养来评估神经毒性,用抗体阻断来识别介质.
- 用基因表达分析和tau介导的神经退行症的小鼠模型来研究COP1缺乏和Cebpb等位基因丧失的影响.
主要成果:
- COP1调节微质中的c/EBPβ蛋白水平.
- 缺少COP1导致c/EBPβ的积累,驱动主要由补充剂介导的促炎和神经毒性基因程序.
- 一个Cebpb基因的丧失减轻了促炎性表型.
- 在体内,COP1缺陷的微质会加剧介导的神经退行.
结论:
- COP1 作为微质中致病性c/EBPβ依赖基因表达程序的关键抑制剂.
- 针对COP1-c/EBPβ轴可能为由微质激活驱动的神经退行性疾病提供治疗策略.
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