异常的Hippo-YAP/TEAD信号驱动在外部听道状细胞癌中恶性转录重编程
Kuniaki Sato1, Noritaka Komune2, Mayumi Ono2
1University of California, San Diego La Jolla, California United States.
这项研究表明,YAP/TEAD通路在外部听道状细胞癌 (EACSCC) 中过度活跃,推动瘤生长. 用抑制剂向这种途径显示出治疗这种罕见癌症的前景.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 外耳道状细胞癌 (EACSCC) 是一种罕见的癌症,分子机制不明.
- 目前对EACSCC的治疗策略是有限的,因为缺乏基于证据的方法.
研究的目的:
- 通过综合的多omics分析来研究EACSCC的分子基础.
- 为了确定EACSCC的潜在治疗目标.
主要方法:
- 综合RNA测序 (RNA-seq) 和ChIP测序 (ChIP-seq) 针对EACSCC和正常耳皮中的YAP和H3K27Ac.
- 在体外和体外使用小分子TEAD抑制剂 (smTEADi) 和基因淘汰/过度表达的功能实验.
- 在患者组织中分析YAP和PITX2的共同表达.
主要成果:
- 在EACSCC中,RNA-seq发现了YAP/TEAD转录程序的过度激活,与糟糕的结果相关.
- ChIP-seq揭示了增加的TF结合站点可访问性和EACSCC特定的超级增强剂 (SE),与YAP结合的SE与EGFR信号相关.
- smTEADi VT104抑制了EACSCC细胞增殖和克隆原性,诱导了YAP-PITX2结合. PITX2 Knockdown 增强了 VT104 的敏感性,而过度表达则促进了瘤的生长.
- 核YAP和PITX2在EACSCC组织中的共同表达与预后不佳相关.
结论:
- 由YAP驱动的转录程序在EACSCC中被过度激活,代表了一个潜在的治疗目标.
- 针对YAP/TEAD信号,可能与调制PITX2结合,为EACSCC提供了一个有前途的治疗策略.
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