UBXN9控制RIG-I类受体的GLUT4介导空间限制和信号传输
Penghua Wang1, Andrew Harrison1, Duomeng Yang2
1University of Connecticut Health Center.
Research square
|June 17, 2024
概括
胰岛素响应型葡萄糖载体4型 (GLUT4) 抑制RIG-I类受体 (RLRs) 的病毒RNA传感. 这种非正规的UBXN9-GLUT4轴通过将RLRs与细胞表面结合来控制先天的抗病毒免疫力.
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) 检测病毒RNA,启动先天性抗病毒反应.
- 葡萄糖载体 (GLUT) 参与RLR触发的代谢变化,但它们在抗病毒免疫中的具体作用尚不清楚.
- 胰岛素反应性GLUT4在免疫中的功能在很大程度上仍未被描述.
研究的目的:
- 研究葡萄糖载体4型 (GLUT4) 在病毒感染期间调节RIG-I类受体 (RLR) 信号传输中的作用.
- 阐明 GLUT4 影响天生的抗病毒免疫力的机制.
- 探索GLUT4在人类炎症状况与过度活跃的干扰素反应中的临床相关性.
主要方法:
- 利用细胞培养模型和基因操纵 (UBXN9和GLUT4删除) 来研究RLR信号.
- 通过免疫光和生化分析研究蛋白质局部化和贩运.
- 分析了干扰素-β (IFN-β) 反应和病毒RNA传感途径.
- 与炎症性肌肉病的患者数据相关的GLUT4表达.
主要成果:
- 在脂肪和肌肉细胞中,GLUT4抑制RLR信号,独立于葡萄糖的摄取.
- 在病毒感染时,GLUT4转移到细胞表面,隔离细胞质RLRs并抑制IFN-β反应.
- 删除UBXN9导致构成性GLUT4贩运和抗病毒免疫力受损,而GLUT4删除增强RLR信号.
- 减少GLUT4表达与具有高干扰素活性的炎症性肌肉病有关.
结论:
- 一个新的UBXN9-GLUT4通路通过控制RLR局部化来调节先天抗病毒免疫力.
- GLUT4作为RLR通过等离子体膜结合信号传递的非正规抑制剂.
- UBXN9-GLUT4轴的调节失调可能会导致炎症性肌肉病的过度活跃干扰素反应.
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