PRC2/FOXO1-介导抑制确定了前列腺癌和尤文肉瘤中ETS基因的可互换性
Nicholas F Downing1, Kaitlyn M Mills1, Peter C Hollenhorst1
1Medical Sciences, Indiana University School of Medicine, Bloomington, Indiana.
Molecular cancer research : MCR
|September 19, 2025
概括
前列腺癌和尤宁肉瘤具有共同的ETS转录因子机制. 针对这些共同的途径为针对这两种癌症的新疗法战略提供了潜力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 涉及ETS转录因子的染色体重组在前列腺癌 (60-70%) 和尤宁肉瘤 (>95%) 中很普遍.
- 这些重组导致异常的ETS蛋白表达或融合蛋白,如Ewing肉瘤中的EWSR1::FLI1.
- 前列腺癌中ETV1,ETV4,ETV5和ERG等ETS因子可以与EWSR1相互作用,这表明共享的分子机制.
研究的目的:
- 调查前列腺癌和尤宁肉瘤中ETS转录因子之间的功能相似性.
- 阐明EWSR1和多抑制综合体2 (PRC2) 在这些ETS因子的瘤活性中的作用.
- 根据共同的机制,确定潜在的治疗点.
主要方法:
- 利用尤文肉瘤细胞系来评估ETV1,ETV4,ETV5和ERG的功能影响.
- 对EWSR1::FLI1进行了敲击实验,并对ERG突变体进行了救援实验.
- 使用生物化学测试研究了ERG,PRC2和FOXO1之间的相互作用.
主要成果:
- 在Ewing肉瘤模型中,ETV1,ETV4和ETV5对EWSR1::FLI1进行了拷贝.
- 通过ERG介导的EWSR1::FLI1的救援取决于中断PRC2的相互作用.
- 鉴定了一种内源性PRC2/FOXO1复合物,其中FOXO1介导ERG/PRC2结合.
- 通过AKT介导的FOXO1降解与前列腺癌中ERG协同作用与PTEN缺失有关.
结论:
- 驱动前列腺癌和尤文肉瘤的ETS转录因子采用类似的瘤机制.
- 通过FOXO1调节的ERG和PRC2之间的相互作用是关键途径.
- 这些共享机制为开发两种癌症统一治疗策略提供了机会.
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