UBXN9控制RIG-I类受体的GLUT4介导空间限制和信号传输
Andrew G Harrison1, Duomeng Yang2,3, Jason G Cahoon1
1Department of Immunology, School of Medicine, University of Connecticut Health Center, Farmington, CT, USA.
Nature immunology
|November 20, 2024
概括
胰岛素敏感的GLUT4蛋白通过隔离RIG-I类受体 (RLRs) 来抑制病毒RNA传感. 这种涉及UBXN9的新型机制影响了先天的抗病毒免疫力,并与炎症性肌肉病变有关.
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:
- 细胞质RIG-I类受体 (RLR) 对于检测病毒RNA和启动先天抗病毒反应至关重要.
- 葡萄糖载体 (GLUT) 在RLR信号发送过程中参与糖分分解重编程,但它们在抗病毒免疫中的具体作用尚不清楚.
研究的目的:
- 研究胰岛素反应性葡萄糖载体4型 (GLUT4) 在调节RLR信号和先天抗病毒免疫的作用.
- 阐明GLUT4影响RLR激活和干扰素反应的机制.
主要方法:
- 利用细胞培养模型和脂肪和肌肉组织中的基因操纵 (基因删除).
- 使用诸如戈尔吉捕捉和等离子体膜转位试验等技术研究蛋白质相互作用和细胞局部化.
- 在病毒RNA挑战后评估了干扰素-β (IFN-β) 反应和RLR信号激活.
主要成果:
- GLUT4通过在血膜上隔离细胞质RLR来抑制RLR信号,从而独立于葡萄糖的摄取.
- 乌比基调节X域9 (UBXN9) 在戈尔吉保留GLUT4;其删除导致构成性GLUT4转位和抗病毒免疫力受损.
- 删除GLUT4增强RLR信号,减少GLUT4表达与人类炎症肌肉病中的过度活跃干扰素反应相关.
结论:
- 一个非正规的UBXN9-GLUT4轴通过控制细胞质RLRs的血连接来调节抗病毒免疫力.
- GLUT4在RLR信号传递中发挥着以前未知的抑制作用,影响宿主防御病毒感染.
- UBXN9-GLUT4通路的调节失调可能会导致异常干扰素信号传递的炎症性肌肉病变的发病.
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