通过mRNA稳定蛋白TTP抑制由炎酶驱动的细胞因子反应
Meghan E O'Keefe1, Hannah C Kondolf1, Stefania De Santis1
1Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
Cell reports
|February 21, 2025
概括
激活NLRP3炎症酶会破坏细胞平衡,并抑制ERK1/2信号传递. 这导致tristetraprolin (TTP) 活性降低,增加细胞因子的释放,并可能恶化炎症性疾病.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- NLRP3炎症酶激活会导致快速的细胞平衡失调,包括戈尔吉和线粒体功能障碍.
- 炎症酶激活对细胞信号通路的全球影响仍然在很大程度上未被探索.
- 改变细胞因子表达是炎症性肠病 (IBD) 发病的关键驱动因素.
研究的目的:
- 为了研究炎酶激活对细胞信号通路的影响.
- 为了确定受NLRP3炎症酶刺激影响的特定信号级联.
- 探索已识别的途径在细胞因子调节和炎症疾病中的作用.
主要方法:
- 结合基因组学和蛋白组学方法.
- 在炎症酶刺激时信号通路抑制的分析.
- 评估tristetraprolin (TTP) 的活性和表达.
- TTP水平与炎症性肠病患者数据的相关性.
主要成果:
- 在炎症酶激活后,确定了ERK1/2 MAP激酶信号级联的抑制.
- 由于ERK1/2活动的丧失,证明了mRNA衰变促进蛋白Tristetraprolin (TTP) 的快速失活.
- 观察到在热致死后细胞因子释放的增加,与TTP无活化有关.
- 在患有炎症性肠病的患者中发现显著升高的TTP表达水平.
结论:
- NLRP3炎症酶激活迅速使ERK1/2-TTP通路失活,这通常会抑制细胞因子的释放.
- 这种失活机制可能会加剧高炎症状态,导致自身炎症性疾病.
- 在IBD中提升的TTP表明在疾病发病过程中起作用,与炎症酶介导的细胞因子失调有关.
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