在分散的跨戈尔吉网络上,PtdIns4P调解NLRP3炎症酶激活
Jueqi Chen1, Zhijian J Chen2,3
1Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nature
|November 30, 2018
概括
多种刺激通过拆解跨戈尔吉网络 (TGN) 来触发NLRP3炎症体. NLRP3与TGN结合,聚合并激活炎症信号通路.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- NLRP3炎症酶与各种人类炎症性疾病有关.
- 不同刺激激活NLRP3的确切机制在很大程度上是未知的.
研究的目的:
- 阐明早期的细胞事件和分子相互作用,以不同的刺激来控制NLRP3炎症酶激活.
主要方法:
- 研究了跨戈尔吉网络 (TGN) 在NLRP3激活中的作用.
- 使用生物化学测试来研究NLRP3和酸丁氨基醇-4-酸盐 (PtdIns4P) 之间的相互作用.
- 观察到NLRP3聚合和下游信号响应刺激.
主要成果:
- 多种NLRP3刺激诱导TGN分解成分散的TGN (dTGN).
- 通过其多基区域与PtdIns4P之间的离子相互作用,NLRP3被招募到dTGN.
- 该dTGN作为NLRP3聚合的支架,促进ASC聚合和下游信号.
- 破坏NLRP3-PtdIns4P相互作用会取消NLRP3的激活.
结论:
- 对dTGN的NLRP3招募是其通过各种刺激激活的关键,保存的早期步骤.
- 这种TGN依赖的机制为理解NLRP3炎症酶组合和激活提供了一个统一的模型.
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