通过EWSR1::FLI1颠覆mRNA降解途径代表了Ewing肉瘤的治疗脆弱性
Bartimée Galvan1,2, Loïc Ongena1, Jonathan Bruyr1
1Laboratory of Gene Expression and Cancer, GIGA Institute, University of Liège (ULiège), Liège, Belgium.
Nature communications
|July 15, 2025
概括
EWSR1::FLI1,在尤宁肉瘤中的转录因子,也通过加速mRNA衰变促进癌症. 这种新发现的功能使得癌细胞容易受到针对HuR的治疗.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 基因规则 基因规则
背景情况:
- 基因融合,如EWSR1::FLI1,是许多癌症的标志,包括尤文肉瘤 (EwS).
- 已知FLI1作为一种瘤转录因子 (TF) 起作用.
- 通过EWSR1::FLI1驱动瘤发生的精确机制仍在被发现.
研究的目的:
- 研究EWSR1::FLI1除了作为转录因子之外的非正规功能.
- 阐明EWSR1::FLI1在调节尤宁肉瘤mRNA稳定性的作用.
- 为了确定针对EWSR1::FLI1介导途径的潜在治疗策略.
主要方法:
- 研究了EWSR1::FLI1作为EWS细胞中的mRNA衰变因子的功能.
- 分析了EWSR1::FLI1与CCR4-NOT死化复合体和HuR/ELAVL1.1的相互作用.
- 评估了EWSR1::FLI1介导的mRNA衰变对细胞对HuR抑制敏感性的影响.
主要成果:
- EWSR1::FLI1作为mRNA衰变因子,独立于其转录活性.
- EWSR1::FLI1与CCR4-NOT复合体和RNA结合蛋白HuR.相互作用.
- EWSR1:FLI1诱导的mRNA衰变对抗HuR的保护功能,使EWS细胞对HuR抑制敏感.
结论:
- EWSR1::FLI1在调节mRNA稳定性方面具有新的转录后功能.
- 这一功能有助于EWSR1::FLI1驱动的瘤发生.
- 针对mRNA稳定通路,特别是HuR,为EWS提供了潜在的治疗途径.
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