PI3K调节TAZ/YAP和mTORC1轴,可以协同准这些轴
bioRxiv : the preprint server for biology
|February 3, 2025
概括
针对PI3K-TAZ/YAP通路进行组合疗法,包括TEAD和mTORC1抑制剂,显示出治疗PI3K激活瘤的前景. 这种方法在临床前模型中协同减少瘤生长和扩散.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症治疗方法 癌症治疗方法
背景情况:
- 瘤是一种多样化的癌症群体,具有有限的向疗法.
- 氨基酸3-激酶 (PI3K) 信号传递在肉瘤中经常被激活,通常是由于PTEN损失,从而呈现出潜在的治疗脆弱性.
- 针对PI3K信号传递一直是临床上具有挑战性的.
研究的目的:
- 为了研究PI3K和Hippo通路在肉瘤中的信号传导之间的相互作用.
- 探索针对肉瘤中的PI3K-TAZ/YAP轴的治疗潜力.
主要方法:
- 在肉瘤组织微阵列中评估了PTEN损失和TAZ/YAP激活.
- 在肉瘤细胞系中剖析PI3K和Hippo信号通路.
- 在PI3K驱动的小鼠模型中评估TAZ和YAP的作用.
- 测试了mTORC1和TEAD抑制剂的疗效,单独和组合,体外和体内.
主要成果:
- 在30%-60%的肉瘤中通过PTEN损失激活PI3K信号,与TAZ和YAP转录协活性剂有关.
- 在PI3K激活的肉瘤中,TAZ和YAP驱动瘤生长.
- 与TEAD抑制剂 (IK-930) 和mTORC1抑制剂 (everolimus) 的联合治疗在体外显示出协同作用的抗增殖作用,并在体内减少瘤生长.
结论:
- PI3K-TAZ/YAP轴代表了瘤瘤的关键瘤性途径,与PI3K-Akt-mTORC1轴平行作用.
- 这个轴提供了一个新的治疗目标.
- 联合抑制TAZ/YAP-TEAD相互作用和mTORC1为治疗PI3K激活的肉瘤提供了一个有希望的协同策略.
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