BLK通过催化TOLLIP酸化来积极调节TLR/IL-1R信号传输
Wei-Wei Li1,2,3, Xu-Xu Fan1,3, Zhi-Sheng Xu2
1State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.
The Journal of cell biology
|December 11, 2023
概括
收费类受体/介质素-1受体 (TLR/IL-1R) 信号传递对免疫非常重要. 这项研究揭示了BLK激酶通过酸化TOLLIP来激活这种途径,促进IRAK1解离和炎症反应.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 信号传输 信号传输
背景情况:
- 收费类受体/介质素-1受体 (TLR/IL-1R) 信号传递对于病原体检测和免疫反应至关重要.
- 托利普蛋白通常通过将IRAK1隔离在非活性状态下来抑制TLR/IL-1R信号传递.
- 从TOLLIP释放IRAK1来激活信号的机制尚不清楚.
研究的目的:
- 阐明控制TLR/IL-1R信号激活的监管机制.
- 研究BLK激酶在TLR/IL-1R介导的炎症反应中的作用.
主要方法:
- 使用BLK缺乏的小鼠模型.
- 通过生物化学分析研究了蛋白质与蛋白质相互作用和酸化事件.
- 在IL-1β挑战时分析了炎症性细胞因子的产生和生存率.
主要成果:
- BLK缺乏导致炎症性细胞因子的产生减少,并增加对IL-1β诱导的致死性抵抗力.
- 发现BLK与IL1R1和IL1RAcP预相关,在IL-1β刺激时自酸化.
- 在特定的氨酸残留物 (Y76/86/152) 中激活BLK化TOLLIP,导致从IRAK1分离和信号激活.
结论:
- BLK作为TLR/IL-1R信号的积极调节器.
- 通过促进IRAK1从TOLLIP释放,BLK促进TLR/IL-1R通路的激活.
- 这些发现确定BLK是炎症级联中的关键组成部分.
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