VAPB是STING介导的先天免疫信号传递的负调节者
Wangsheng Ji1, Yin Zhang1, Lianfei Zhang2
1Joint National Laboratory for Antibody Drug Engineering, School of Medicine, Henan University, Kaifeng 475000, China.
Science advances
|December 3, 2025
概括
囊泡相关膜蛋白相关蛋白B (VAPB) 负面调节STING通路,这是先天免疫反应的关键部分. 缺少VAPB会增强I型干扰素的产生,并保护人免受HSV-1感染.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 干扰素基因刺激器 (STING) 途径对于对细胞核DNA的天生的免疫是至关重要的.
- 刺激信号的失调与各种疾病有关.
- 控制STING激活的机制需要进一步研究.
研究的目的:
- 为了确定STING介导的先天免疫反应的新型调节者.
- 阐明VAPB在STING信号传输中的作用.
- 探索STING通路调节失调与肌缩侧面硬化症 (ALS) 之间的联系.
主要方法:
- 通过CRISPR查,确定VAPB是刺痛调节剂.
- 共同免疫沉和西部斑点测试以评估蛋白质相互作用.
- 干扰素报告测定和定量PCR测量I型干扰素表达.
- 在VAPB缺乏小鼠的体内HSV-1感染模型.
主要成果:
- 囊相关的膜蛋白相关蛋白B (VAPB) 被确定为STING的负调节者.
- 缺少VAPB导致I型干扰素的表达增加,在构成性和刺激时.
- VAPB调节了STING转移,寡合化和TBK1的招募.
- 在体内,VAPB缺乏会保护人免受致命的HSV-1感染.
- 与ALS相关的VAPB P56S突变增强了STING活动.
结论:
- VAPB作为cGAS-STING天生的免疫路径的关键负调节者.
- 缺少VAPB会增强I型干扰素反应和抗病毒免疫力.
- 致病性VAPB P56S突变可能通过STING过活化导致ALS病变.
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