泰特兰地林通过一个LIMP-2-依赖和斯芬戈辛介导的机制调节NAADP介导的信号传递
Wing-Cheung Chan1,2, Qian Zhao1,2, Koon Ho Wong3,4,5
1Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, PR China.
Nature communications
|July 8, 2025
概括
泰特兰德林通过向溶酶体整体膜蛋白-2 (LIMP-2),这是信号传递的关键调节器,从而抑制埃博拉病毒的复制. 这一发现为针对LIMP-2的新抗病毒疗法提供了潜力.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 泰特兰丁 (Tet) 通过通过内分泌体双孔通道 (TPC) 影响的释放来抑制埃博拉病毒的复制.
- 二也表现出抗瘤的特性.
- 精确的分子标和Tet的作用机制尚未完全阐明.
研究的目的:
- 为了识别Tetrandrine的直接分子标.
- 阐明这个标在二抑制埃博拉病毒复制中的作用及其对信号传递的影响.
- 探索Tetrandrine及其点的治疗潜力.
主要方法:
- 使用可点击的光亲和探头来识别Tetrandrine的直接结合伙伴.
- 研究了Tetrandrine和LIMP-2调节对溶酶体脂质运输和信号传递的影响.
- 评估了斯芬戈在调节 lysosomal 释放中的作用.
- 检查了Tetrandrine对亡和展开蛋白质反应的影响.
主要成果:
- Lysosomal 整体膜蛋白-2 (LIMP-2) 被确定为Tetrandrine的直接目标.
- 泰特兰地林与LIMP-2的ectodomain结合,抑制 lysosomal胆固醇和斯芬戈辛的运输,并改变脂质代谢.
- 氨酸治疗和LIMP-2枯竭减少了NAADP依赖的释放,这一过程通过调节 lysosomal胆固醇和sphingosine可逆.
- 发现神素可以通过TPC触发 lysosomal 释放,恢复 Tet 治疗或 LIMP-2 缺乏细胞的信号传递.
- 在较高度下,Tetrandrine通过独立于LIMP-2的未折叠蛋白质反应激活诱导亡.
结论:
- 二作为LIMP-2抑制剂,揭示了一个LIMP-2-调节的,依赖于sphingosine的 lysosomal信号传递途径.
- 这些发现阐明了Tetrandrine在信号传递和细胞死亡中的机制.
- 氨酸和LIMP-2抑制剂显示出抗病毒治疗的治疗潜力,特别是针对埃博拉病毒.
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