皮表皮生长因子受体 (EGFR) 是瘤抑制剂E3结合酶FBXW7的标
Matteo Boretto1, Maarten H Geurts1, Shashank Gandhi1,2
1Organoid group, Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, 3584 CT Utrecht, the Netherlands.
概括
结肠器官中的FBXW7突变通过稳定EGFR来降低癌细胞生长对EGF的依赖. 这影响了对EGFR-MAPK抑制剂的敏感性,为结直肠癌治疗提供了洞察力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- FBXW7 (F-box和氨酸丰富的重复蛋白5) 是一种瘤抑制剂E3无素合酶,向蛋白质进行蛋白质体降解.
- FBXW7中的突变与各种人类癌症有关,包括结肠直肠癌 (CRC).
- 皮表皮生长因子受体 (EGFR) 信号传递对细胞增殖至关重要,是CRC治疗的关键标.
研究的目的:
- 研究FBXW7突变对EGFR信号传递和结肠直肠癌有机体生长的功能影响.
- 阐明FBXW7突变影响EGFR蛋白稳定性和细胞对EGF的依赖性的分子机制.
- 评估FBXW7突变对EGFR向疗法的疗效的影响.
主要方法:
- 使用CRISPR基编辑,将特定的FBXW7热点突变引入人类结肠器官.
- 进行了转录组和蛋白组分析,以评估基因和蛋白质表达和稳定性的变化.
- 研究了EGFR的降基因,包括CRISPR介导的T693降基因的破坏.
- 为了验证,使用了CRC衍生器官系和接受泛慕马布治疗的患者队列.
主要成果:
- FBXW7突变大大降低了结肠器官中的EGF依赖性 (约10,000倍).
- 由于降解受损,突变有机体表现出增加的EGFR蛋白稳定性.
- 干扰EGFR T693的化模仿了FBXW7突变效应,减少了降解和EGF的依赖性.
- FBXW7突变器官和来自患者的瘤对像panitumumab这样的EGFR-MAPK抑制剂的敏感性降低.
结论:
- FBXW7突变通过增强EGFR蛋白稳定性和减少对EGF信号的依赖,促进癌细胞的生存.
- 由于FBXW7突变导致EGFR周转率受损,导致对EGFR向疗法的耐药性.
- 了解FBXW7在EGFR调节中的作用对于开发有效的CRC治疗策略至关重要.
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