相关实验视频

Updated: Jan 20, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

PtdIns(3,5) P2 是先天性免疫信号传递中刺痛的内源性连接体

Jay Xiaojun Tan, Bo Lv, Jie Li

bioRxiv : the preprint server for biology

|January 19, 2026

概括

酸氨基3,5-双酸盐[PtdIns(3,5) P2]作为一种内源性STING配体,增强了cGAMP诱导的激活. 这种脂质分子对于STING贩运和先天性免疫反应至关重要.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
生物化学生物化学

背景情况:

细胞核DNA通过cGAS-STING通路触发天生的免疫力.
一个ER本地化适配器STING在cGAMP结合时激活TBK1和IKK.
从ER到Golgi的STING贩运对于下游信号提供至关重要.

研究的目的:

为了识别STING的内源性配体.
阐明PtdIns(3,5) P2在STING激活和先天免疫中的作用.

主要方法:

蛋白质组学用于识别STING相互作用蛋白质.
在CRISPR中介的删除PIKfyve.
在体外生化分析包括FRET和冷EM.
在STING的局部定向突变发生.

主要成果:

PtdIns(3,5) P2被确定为STING的内源性联体.
一个PtdIns(3,5) P2-产生酶PIKfyve与STING相互作用.
PtdIns(3,5) P2增强了cGAMP诱导的STING激活和寡合化.
删除PIKfyve或STING突变可以阻止STING贩运和TBK1激活.

结论:

PtdIns(3,5) P2是STING的一个关键的脂质连接体.
PtdIns ((3,5) P2在STING介导的先天性免疫信号传递中发挥着重要作用.

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