DEPTOR通过通过HUWE1 E3结合酶促进EGFR降解来抑制淋巴发生
Xiufang Xiong1,2,3,4, Xiaoyu Chen5, Shengpeng Shao6,7,8
1Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. xiufang@zju.edu.cn.
Cell death and differentiation
|April 1, 2025
概括
在淋巴瘤发育过程中,DEPTOR 作为瘤抑制剂起作用. 失去DEPTOR会加速淋巴瘤的发展,而其重新激活可能为这种癌症提供一种新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- DEPTOR是一种参与瘤发生的mTOR抑制剂,在癌症中经常失调.
- 在淋巴发育中DEPTOR的作用尚不清楚,具有取决于上下文的瘤抑制或瘤致癌功能.
- 在各种人类癌症中观察到DEPTOR的失调,这表明它可能与淋巴瘤有关.
研究的目的:
- 为了研究DEPTOR在淋巴发育中的作用.
- 阐明DEPTOR调节淋巴瘤发育的分子机制.
- 评估向DEPTOR在淋巴瘤中的治疗潜力.
主要方法:
- 利用了与异合性Pten损失的小鼠淋巴瘤模型.
- 生成和分析的小鼠具有Deptor淘汰 (KO) 和一种耐降解的Deptor淘汰 (KI) 变体 (DeptorS275A).
- 在人类淋巴瘤组织和正常淋巴结中检查了DEPTOR蛋白水平.
主要成果:
- 在Pten-loss小鼠中,Deptor KO加速了淋巴发育并缩短了寿命.
- 耐降解的 Deptor S275A KI 变体显著抑制了淋巴发育.
- 与正常淋巴结相比,在人类淋巴瘤组织中观察到较低的DEPTOR蛋白水平.
- 在机械上,DEPTOR增强了EGFR的泛化和降解,使MAPK信号失活,并抑制了mTORC1和mTORC2信号.
结论:
- 在Pten损失诱导的淋巴发育中,DEPTOR作为瘤抑制剂起作用.
- 重新激活DEPTOR为淋巴瘤治疗提供了一个有前途的治疗策略.
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