卡维奥林-1与P2X7受体形成复合体,并调整小鼠骨髓衍生的巨细胞中P2X7介导的ATP信号传递
Yuuki Sawai1, Yoshiaki Suzuki1, Masataka Asagiri2
1Department of Molecular and Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan.
American journal of physiology. Cell physiology
|November 13, 2023
概括
卡维奥林-1 (Cav-1) 抑制了巨细胞中的P2X7受体活性,减少和离子流,防止过度炎症和细胞死亡. 这一发现突显了Cav-1在调节天生的免疫力方面的作用.
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:
- P2X7受体 (P2X7R) 对于巨细胞的炎症信号传递至关重要.
- 卡维奥林-1 (Cav-1) 参与调节巨细胞和天生的免疫功能.
- 在巨细胞中,Cav-1和P2X7R之间的相互作用在很大程度上仍未被描述.
研究的目的:
- 调查Caveolin-1 (Cav-1) 在调节巨细胞中P2X7受体 (P2X7R) 活性和功能的作用.
- 阐明Cav-1对P2X7R介导免疫反应的影响的分子机制.
主要方法:
- 使用来自野生类型 (WT) 和Cav-1淘汰赛 (KO) 小鼠的骨髓衍生巨细胞 (BMDM).
- 通过 ([Ca2+]) 和 ([K+]) 流量测量评估P2X7R活性.
- 采用全内部反射光成像和近距离结合试验来检测分子复合物形成.
- 分析了细胞不透的染料吸收量 (TO-PRO3),以评估巨孔形成.
- 量化IL-1β分泌,活性氧物种 (ROS) 生产,Gasdermin D (GSDMD) 裂变和乳酸脱酶 (LDH) 释放以评估热.
主要成果:
- 在WT BMDM中,ATP刺激通过P2X7R诱导了Ca2+流入和K+流出,而A-740003.3抑制了Ca2+流入和K+流出.
- 在WT BMDM中确定了P2X7R和Cav-1之间的新型分子复合体,由ATP增强.
- 在Cav-1 KO BMDM中,P2X7R介导的Ca2+流入和K+流出,以及TO-PRO3吸收 (表明巨孔形成) 显著增加.
- 在Cav-1 KO BMDM中,ATP诱导的IL-1β分泌,ROS产生,GSDMD裂变和LDH释放都呈现出较高的IL-1β分泌,这表明了热.
- A-740003完全废除了ATP诱导的热.
结论:
- 卡维奥林-1 (Cav-1) 在巨细胞中负面调节P2X7受体 (P2X7R) 活性.
- 卡维-1抑制了P2X7R介导的巨孔形成,从而降低了阳离子的透性和染料的吸收.
- 卡维-1在防止过度的IL-1β分泌和热中发挥着关键作用,有助于微调巨细胞免疫反应.
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