发现了SQSTM1/p62依赖的P体,这些P体调节NLRP3炎症体
Elizabeth R Barrow1, Evelina Valionyte1, Chris R Baxter1
1Peninsula Medical School, Faculty of Health, University of Plymouth, Research Way, PL6 8BU Plymouth, UK.
Cell reports
|March 9, 2024
概括
在细胞应激下,自的p62滴转化为扩大的P体 (pd-PBs). 这些pd-PBs招募ASC来激活NLRP3炎症体,导致炎症和细胞毒性.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 自和核糖蛋白颗粒 (P体,压力颗粒) 是细胞应激反应的关键.
- SQSTM1/p62分相分离的液滴对于选择性自至关重要.
- 以前不知道p62的存在形式超出了自滴.
研究的目的:
- 为了研究p62在细胞压力下的替代形式.
- 阐明p62滴滴转化的机制和功能.
- 确定p62-依赖P体 (pd-PBs) 在细胞应激反应和炎症中的作用.
主要方法:
- 诱导细胞应激 (蛋白毒性,内毒性,氧化).
- 使用显微镜和生物化学分析分析p62滴形成和转化.
- 研究蛋白质与蛋白质相互作用,特别是p62和DDX6.6之间的相互作用.
- 评估炎症酶组合和激活,包括NLRP3和ASC招募.
主要成果:
- 在各种压力条件下,自的p62滴转化为扩大的P体 (pd-PBs).
- 对于这些pd-PBs的核形成,p62相分离是必不可少的.
- pd-PBs的形成是由p62-DDX6相互作用介导的.
- pd-PBs招募ASC,导致NLRP3炎症酶组合和随后的炎症相关细胞毒性.
结论:
- p62滴到PB的转换是一种新的应激反应机制.
- 这种转换激活了NLRP3炎症酶途径.
- 持久的pd-PBs有助于NLRP3依赖的炎症毒性,突出了p62聚合和先天免疫之间的新联系.
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