EZH2-TTP-mTORC1轴驱动致命前列腺癌中的表型可塑性和治疗脆弱性
Beatriz German1,2,3, Katherine L Morel4, Teia Noel5
1Center for Prostate Disease Research, Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
bioRxiv : the preprint server for biology
|August 20, 2025
概括
前列腺癌的表型可塑性 (PCa) 驱动了抗性. 向肠道同源2 (EZH2) 和PI3K/mTORC1的向增强剂与酶胺为致命的PCa提供了一个新的治疗策略.
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:
- 现型可塑性是前列腺癌 (PCa) 治疗耐药性的关键机制.
- 塑料PCa的特定分子驱动因素和有效的治疗干预措施仍然不完全理解.
- 增强性凝血同源2 (EZH2) 已被确定为促进表型可塑性的替代转录程序的调节者.
研究的目的:
- 阐明在前列腺癌中EZH2驱动的表型可塑性背后的分子机制.
- 研究RNA结合蛋白Tristetraprolin (TTP) 在调节EZH2细胞状态中的作用.
- 评估EZH2和PI3K/mTORC1联合抑制的治疗疗效,单独和标准疗法,在PCa的临床前模型中.
主要方法:
- 使用了缺乏Pten和Rb1.1的基因工程小鼠模型 (GEMMs).
- 采用多omics方法来分析分子变化.
- 在小鼠和人类PCa模型中评估了EZH2和PI3K/mTORC1联合化学抑制的抗瘤活性.
主要成果:
- 证明EZH2调节了多系细胞状态,这些细胞状态依赖于三烯 (TTP).
- 表明TTP调解RNA稳定性和翻译激活.
- 在塑料PCa模型中发现了与EZH2和PI3K/mTORC1联合抑制的优异抗瘤活性.
- 当结合疗法与割或恩扎胺一起使用时,观察到效率的提高.
结论:
- 致死性前列腺癌的表型可塑性严重依赖于EZH2,TTP和mTORC1信号的协调功能.
- 这种协调代表了晚期前列腺癌的新疗法脆弱性.
- 结合抑制EZH2和PI3K/mTORC1,特别是与酶胺,显示出治疗耐药PCa表型的显著前景.
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