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异常的Notch信号促进了食道状细胞癌中的瘤血管生成
Cainan Li1, Pujie Wu1, Xiaoting Xie1
1Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
Signal transduction and targeted therapy
|July 21, 2025
概括
异常的Notch信号驱动食道癌血管新生通过上调USP5,这稳定了STAT3.3. 与化疗一起抑制USP5显示出治疗这种侵袭性癌症的前景.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 食道平细胞癌 (ESCC) 是一种高度恶性胃肠道癌,治疗选择有限.
- 切口信号在ESCC中经常过度激活,但其在瘤进展,特别是血管新生中的确切作用尚未完全理解.
研究的目的:
- 阐明Notch信号在ESCC瘤血管生成中的作用.
- 为了确定参与ESCC血管生成的Notch信号的下游影响者.
- 探索针对ESCC中Notch信号通路的治疗策略.
主要方法:
- 对临床ESCC样本的分析,以将Notch信号激活与临床病理特征和患者存活率相关联.
- 在体外和体内实验中评估Notch信号抑制对ESCC血管生成的影响.
- 整合CUT&Tag和RNA测序数据以识别Notch信号下游目标.
- 生物化学试验,以研究USP5在STAT3.3上的二化功能.
- 在小鼠模型中评估联合化疗和USP5抑制的疗效的临床前研究.
主要成果:
- 在ESCC样本中的痕信号激活得分与微血管密度,高级TNM阶段和患者存活率降低有显著的相关性.
- 沉默切口信号显著抑制了ESCC细胞驱动的血管生成,在体外和体内.
- 乌比基特异性蛋白酶5 (USP5) 被确定为NOTCH1细胞内域 (NICD1) - RBPJ复合体的直接转录标.
- USP5对STAT3进行双化和稳定,从而增加了亲血管性因子 (VEGF,ANGPT2,CXCL1) 的产生.
- 结合化疗和USP5抑制剂的联合治疗抑制了小鼠的瘤生长和血管生成.
结论:
- 异常的Notch信号通过NOTCH1-USP5-STAT3轴促进ESCC血管生成.
- 通过稳定STAT3,USP5起到关键的调解作用,从而增强了亲血管性因子的产生.
- 向USP5与化疗结合,为ESCC提供了一个潜在的治疗策略,旨在抑制瘤生长和血管生成.
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