AbstractRho family mechano-signaling through the actin cytoskeleton positively regulates physiological TEAD/YAP transcription, while the evolutionarily conserved Hippo tumor suppressor pathway antagonizes this transcription through YAP cytoplasmic localization/degradation. The mechanisms responsible for oncogenic dysregulation of these pathways, their prevalence in tumors, as well as how such dysregulation can be therapeutically targeted are not resolved. We demonstrate that p53 DNA contact mutants in human tumors, indirectly hyperactivate RhoA/ROCK1/actomyosin signaling, which is both necessary and sufficient to drive oncogenic TEAD/YAP transcription. Moreover, we demonstrate that recurrent lesions in the Hippo pathway depend on physiological levels of ROCK1/actomyosin signaling for oncogenic TEAD/YAP transcription. Finally, we show that ROCK inhibitors selectively antagonize proliferation and motility of human tumors with either mechanism. Thus, we identify a cancer driver paradigm and a precision medicine approach for selective targeting of human malignancies driven by TEAD/YAP transcription through mechanisms that either upregulate or depend on homeostatic RhoA mechano-signaling.
摘要:Rho家族机械信号透过肌动蛋白细胞骨架正向调节生理
TEAD/YAP转录,而进化上保守的Hippo肿瘤抑制通路则通过YAP胞质定位/降解来拮抗此转录。这些通路的致癌失调机制、它们在肿瘤中的普遍性以及如何治疗性地针对这种失调尚未解决。我们证明,人类肿瘤中的p53 DNA接触突变间接高活化了RhoA/ROCK1/肌动蛋白信号,这既是驱动致癌
TEAD/YAP转录所必需的,也是足够的。此外,我们证明,Hippo通路中的复发性损伤依赖于生理
水平的ROCK1/肌动蛋白信号来驱动致癌
TEAD/YAP转录。最后,我们展示ROCK
抑制剂选择性地拮抗了具有这两种机制的人类肿瘤的增殖和运动性。因此,我们确定了一种癌症驱动范式和一种精准医学方法,可以选择性地针对通过上调或依赖于稳态RhoA机械信号的机制驱动的人类恶性肿瘤。