Ku70与YAP结合,改变PARP1的平移,以调节基因组稳定性和瘤发生
Yinyin Shu1, Xiaoni Jin1, Mintao Ji1
1State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu Key Laboratory of Infection and Immunity, The Fourth Affiliated Hospital of Soochow University, School of Radiation Medicine and Protection, Suzhou Medical College of Soochow University, Suzhou, China.
Cancer research
|June 11, 2024
概括
Ku70蛋白质的损失增强了YAP活性,导致PARP1降解和基因组不稳定性的增加. 这促进了结肠癌和肝癌的癌症发展.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 遗传学 是一个
背景情况:
- 是的相关蛋白 (YAP) 在癌症中至关重要,在DNA损伤反应中扮演着新兴的角色.
- YAP/TAZ与DNA修复途径之间的相互作用尚未完全理解.
研究的目的:
- 阐明连接DNA损伤修复和YAP活动的机制.
- 研究Ku70在调节YAP的转录功能中的作用及其对瘤发生的影响.
主要方法:
- 使用生物化学测试研究了Ku70,YAP和TEAD4之间的相互作用.
- 在Ku70耗尽后评估YAP转录活动.
- 用于结肠癌和肝细胞癌 (HCC) 的体内模型.
- 研究了YAP通过SMURF2-介导的泛素蛋白蛋白酶路径对DNA损伤修复的作用.
- 分析患者的HCC样本,检查Ku70,YAP,PARP1和基因组不稳定之间的相关性.
主要成果:
- Ku70在YAP结合方面与TEAD4竞争,从而限制了YAP的转录活动.
- Ku70的枯竭会增加YAP-TEAD4的相互作用,增强YAP的活性,并在体内增强瘤发生.
- 通过SMURF2诱导PARP1降解,从而损害DNA损伤修复,YAP促进了基因组的不稳定.
- HCC患者的数据证实了低Ku70,高YAP活性,低PARP1和基因组不稳定性增加之间的联系.
结论:
- 一个新的Ku70-YAP-PARP1轴调节了基因组稳定性.
- 这个轴的破坏,特别是通过Ku70损失,通过增加YAP活动和DNA损伤驱动瘤发生.
- 针对这种途径可以为YAP驱动的癌症提供新的治疗策略.
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