一个MYC-STAMBPL1-TOE1正反循环调解了肝细胞癌中的EGFR稳定性
Hongli Zhang1, Zixuan Wang1, Jian Zhang2
1State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, P.R. China.
Cell reports
|October 10, 2024
概括
通过稳定EGFR蛋白和mRNA,STAMBPL1二维基因酶对肝癌产生影响. 抑制STAMBPL1或TOE1增强了伦瓦替尼的作用.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 在肝细胞癌 (HCC) 中,STAM结合蛋白类型1 (STAMBPL1) 的作用是不清楚的.
- 表皮生长因子受体 (EGFR) 信号传递对肝癌的发展至关重要.
研究的目的:
- 为了阐明STAMBPL1在肝脏瘤发生中的功能.
- 研究STAMBPL1在调节EGFR稳定性和拼接中的作用.
- 探索STAMBPL1作为HCC的潜在治疗点.
主要方法:
- 研究了STAMBPL1对EGFR蛋白和mRNA稳定性的影响.
- 在体外和体外评估STAMBPL1在肝脏瘤发生中的作用.
- 研究了STAMBPL1,EGFR和TOE1.1之间的相互作用.
- 评估了STAMBPL1/TOE1抑制与伦瓦替尼的协同效应.
主要成果:
- 缺少STAMBPL1可以减少肝脏瘤的发生.
- STAMBPL1通过去除与K63结合的泛素链来稳定EGFR,防止溶酶体降解.
- STAMBPL1通过TOE1增强EGFRRNA剪接,防止内质保留.
- EGFR-MYC轴积极调节STAMBPL1转录;STAMBPL1的枯竭会阻碍MYC驱动的瘤发生.
- 抑制STAMBPL1或TOE1协同增强了伦瓦替尼的抗瘤活性.
结论:
- 通过调节EGFR稳定性和拼接,STAMBPL1促进肝癌.
- 在HCC中,STAMBPL1是EGFR-MYC信号通路中的关键调节器.
- 向STAMBPL1或TOE1为HCC提供了潜在的治疗策略,特别是与伦瓦替尼布结合使用.
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