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在β-cateninmRNA的5'UTR中的一个结构元素在缺氧下调节其翻译
Mattia D'Agostino1, Javier Rol-Moreno1,2, Guillaume Bec1
1Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, Université de Strasbourg, 2 Allée Konrad Roetgen, Strasbourg 67084, France.
Nucleic acids research
|May 1, 2025
概括
在缺氧期间,癌细胞劫持了致癌β-catenin蛋白的翻译. 它的mRNA5'未翻译区域 (5'UTR) 中的一种特定结构驱动了这一过程,为癌症治疗提供了一个新的点.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 细胞应激反应的应激反应
背景情况:
- 对于细胞适应,翻译启动受到严格监管.
- 缺氧诱导转化重编程,对癌细胞存活和可塑性至关重要.
- 瘤原蛋白β-catenin对于Wnt信号传递和癌症进展至关重要.
研究的目的:
- 阐明维持β-catenin转化在缺氧癌细胞中的机制.
- 为了确定 β-catenin mRNA 5' 未翻译区域 (5'UTR) 的调节元素,该区域负责压力下的翻译.
- 探索针对β-catenin转换的治疗策略.
主要方法:
- 在纤维素中分析β-catenin mRNA 5'UTR结构.
- 在5'UTR.中识别RNA-蛋白相互作用.
- 对特定启动因子和抑制剂的翻译依赖性的评估.
主要成果:
- 在β-catenin 5'UTR中确定了一种富含GC的三向结 (TWJ) 结构.
- 这种TWJ通过定eIF4B,eIF4A和eIF4G2.2来增强缺氧驱动的翻译.
- 在缺氧下β-cateninmRNA的翻译依赖eIF4A,对抑制剂silvestrol敏感.
结论:
- β-catenin 5'UTR 含有低氧反应元件 (TWJ),可以维持它的翻译.
- 这种机制突显了癌细胞在压力下的脆弱性.
- 针对β-catenin的eIF4A-依赖翻译提供了一个潜在的治疗策略来对抗癌症.
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