在USP8和Hippo/YAP轴之间的正反调节驱动三重阴性乳腺癌进展
Xin Li1,2, Penghe Yang1,3, Tianshi Wang4
1Xinxiang Key Laboratory of Tumor Migration and Invasion Precision Medicine, School of Medical Technology, Xinxiang Medical University, Xinxiang, Henan Province, PR China.
Cell death & disease
|January 21, 2026
概括
乌比基特异性酶8 (USP8) 稳定了YAP,促进了三阴性乳腺癌 (TNBC) 的进展. 抑制USP8会阻止TNBC的生长,这表明USP8是这种侵袭性癌症的潜在治疗标.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 河马/ (YAP) 信号通路在三阴性乳腺癌 (TNBC) 中过度激活,导致瘤进展.
- 虽然抑制性酸级联仍然具有功能,但TNBC中YAP的过度激活尚未完全理解.
- 越来越多地认识到YAP的乌比奎丁修饰在癌症进展中的作用.
研究的目的:
- 调查在TNBC内YAP功能中的ubiquitination和deubiquitination的机制.
- 为了确定参与TNBC中YAP调节的关键二氧化酶 (DUBs).
- 探索在TNBC中准DUB的治疗潜力.
主要方法:
- 使用二维基酶 (DUB) 库进行siRNA查,以确定影响YAP的关键DUB.
- 进行生物化学测试以阐明USP8和YAP之间的相互作用.
- 分析了临床数据,以将USP8表达与患者存活率和TNBC中的YAP蛋白水平相关联.
主要成果:
- 确定了乌比基特异性酶8 (USP8) 作为YAP功能和TNBC进展的关键作用因子.
- 证明USP8抑制通过调节Hippo信号显著阻碍了TNBC的进展.
- 发现USP8直接与YAP促进体结合,增强其转录并建立一个积极的反循环.
结论:
- USP8通过抑制K48结合的多基化来增强YAP的稳定性,从而有助于TNBC的进展.
- 在TNBC中USP8和Hippo信号之间存在一个正反循环.
- USP8代表了治疗三阴性乳腺癌的有希望的治疗标.
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