sTREM2通过MAPK-JNK信号通路在髓衍生的细胞模型中不同影响细胞因子表达
Ryan Arsenault1,2, Steven Marshall2, Patrick Salois1
1Human Health Therapeutics Research Centre, National Research Council of Canada, Ottawa, ON K1A 0R6, Canada.
Biology
|February 23, 2024
概括
可溶性TREM2 (sTREM2) 通过调节髓状细胞中的炎症性细胞因子表达来影响先天免疫反应. 这项研究显示,sTREM2激活了MAPK-JNK信号传递和NLRP3炎症酶通路.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 在骨髓细胞表达的触发受体2 (TREM2) 是微质和巨细胞上的一个关键的先天免疫受体.
- 在TREM2的突变与神经退行性疾病,如阿尔茨海默病 (AD) 相关.
- 溶性TREM2 (sTREM2),从细胞膜分离出来,在AD进展过程中显示出改变的水平,但其在天生的免疫力中的作用尚不清楚.
研究的目的:
- 为了研究sTREM2对髓衍生的THP-1单细胞和巨细胞的炎症作用.
- 为了描述sTREM2诱导的炎症反应背后的信号机制.
- 探索sTREM2对各种巨细胞亚型 (M0,M1,M2) 的差异性影响.
主要方法:
- 用sTREM2.2治疗THP-1细胞和分化的巨细胞.
- 随着时间的推移,对炎症性和抗炎性细胞因子表达的分析.
- 研究信号通路,包括MAPK-JNK和NLRP3炎症体.
- 使用TREM2抗体和NLRP3抑制剂来探测分子机制.
主要成果:
- 在早期 (2-8小时) 的THP-1细胞中,sTREM2刺激了炎症性细胞因子的表达,后来刺激了抗炎性细胞因子.
- sTREM2对M0,M1和M2巨细胞表现出差异性影响,刺激M0,对M2的影响较小,并抑制M1巨细胞.
- sTREM2诱导的细胞因子表达主要通过MAPK-JNK通路进行介导.
- sTREM2/TREM2抗体复合体激活了NLRP3炎症酶途径,增加了IL-1β的表达.
结论:
- sTREM2在各种髓状细胞类型中差异调节细胞因子表达.
- MAPK-JNK信号通路是sTREM2诱导的细胞因子反应的关键调解者.
- sTREM2及其抗体复合体可以激活NLRP3炎症体,这表明它在与神经退行相关的炎症过程中起作用.
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