MARCH1通过无处不在的TBK1来负面调节TBK1-mTOR信号通路
Xiao Li1, Kai Cheng1, Meng-Di Shang2
1The Second Clinical Medical College , Binzhou Medical University, Yantai, Shandong, 264003, P.R. China.
BMC cancer
|July 26, 2024
概括
E3 泛基因酶 MARCH1 通过向细胞生长的关键调节者 TBK1 来抑制mTOR信号通路. 这一发现揭示了一种新的机制,可以控制细胞增殖以应对生长因子.
科学领域:
- 蜂信号传输是如何进行的
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- TBK1 (TANK-binding kinase 1) 激活了mTOR信号通路,这对于细胞生长至关重要.
- 对于TBK1-mTOR通路的调节仍然不完全理解.
- STING与TBK1和MARCH1相互作用,这表明MARCH1可能有监管作用.
研究的目的:
- 调查MARCH1是否通过准TBK1.1来调节mTOR信号通路.
主要方法:
- 同免疫沉 (Co-IP) 证实蛋白相互作用.
- 变性共免疫沉以分析无处不在.
- 西方涂抹用于量化蛋白质水平.
- 晶体病毒介导的shRNA用于稳定基因敲击.
- 伤愈合和克隆基细胞生存测定用于增殖和迁移分析.
主要成果:
- 马克1负面调节增长因子诱导的TBK1-mTOR信号通路.
- 过度表达MARCH1会减弱mTOR的激活;缺乏MARCH1会增强mTOR的激活.
- MARCH1促进了TBK1的K63连接的无处不在,削弱了它与mTOR的相互作用.
- 通过抑制mTOR,STING或TBK1.1,可以逆转MARCH1缺乏引起的增殖.
结论:
- MARCH1通过准STING-TBK1-mTOR轴来抑制生长因子介导的mTOR信号传递.
- 在这种途径中,MARCH1充当负调节者,影响细胞增殖.
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