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Updated: Jun 3, 2025

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综合应激反应驱动MET在癌症中的癌基因过度表达
Marina Cerqua1, Marco Foiani1, Carla Boccaccio2,3
1IFOM ETS-The AIRC Institute of Molecular Oncology, 20139, Milano, Italy.
The EMBO journal
|January 8, 2025
概括
癌细胞通过综合应激反应 (ISR) 过度表达MET瘤基因,这是由MET mRNA 5'未翻译区域 (5'UTR) 调节的过程. 阻止这种压力诱导的MET转化抑制了癌症的入侵.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 癌细胞表现出侵袭性生长,由诸如上皮细胞到介质细胞的过渡和迁移等过程驱动.
- MET瘤基因是这些侵袭性过程的关键调节者,在大多数癌症中过度表达.
- 驱动广泛的MET癌基因过度表达的机制在很大程度上是未知的,因为突变很少发生.
研究的目的:
- 阐明在癌症中MET基因过度表达背后的机制.
- 研究综合应激反应 (ISR) 在调节MET转化中的作用.
- 为了确定是否针对压力诱导的MET翻译可以抑制癌症的进展.
主要方法:
- 分析MET mRNA 5'未翻译区域 (5'UTR) 的应激反应元素.
- 调查真核转化启动因子2α (eIF2α) 酸化在MET调控中的作用.
- 利用基因突变 (uORFs,eIF2α S52A) 和途径抑制剂来调节ISR和MET表达.
- 评估阻断压力诱导的MET转化对MET依赖的侵入性生长的影响.
主要成果:
- MET mRNA 5'UTR 含有功能应激反应元件,可通过ISR进行翻译调节.
- 由各种压力因素 (血清饥饿,缺氧,化疗) 诱导的ISR激活导致MET蛋白过度表达.
- 在MET 5'UTR中突变uORF,改变eIF2α,或抑制ISR通路会减少压力诱导的MET过度表达.
- 抑制压力诱导的MET转化有效地抑制了癌细胞中MET依赖的侵入性生长.
结论:
- MET瘤基因的升级与综合应激反应有功能性联系.
- MET mRNA 5'UTR 作为一个集成压力信号以控制 MET 翻译的关键枢纽.
- 针对ISR介导的MET转化控制提供了一个潜在的治疗策略,以抑制癌症的进展和入侵.
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