DNMT2-m5C-ACLY轴通过素乙化介导的口路径促进肝细胞癌中伦瓦替尼的抗性
Shiguang Yang1,2, Jie Li3, Shengwei Mao1
1Department of Hepatobiliary Surgery and Liver Transplantation, Key Laboratory of Carcinogenesis and Cancer Invasion, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 19, 2025
概括
通过向DNA甲基转移酶2 (DNMT2) 来克服肝癌 (HCC) 中对伦瓦提尼布的耐药性. 通过降低DNMT2的调节,通过抑制DNMT2-ACLY-NOTCH通路恢复敏感性,从而提供新的治疗策略.
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:
- 伦瓦提尼布是先进肝细胞癌 (HCC) 的一线治疗方法.
- 获得的耐药性限制了伦瓦提尼布的临床疗效.
- 确定逆转伦瓦替尼布耐药性的标对于改善治疗结果至关重要.
研究的目的:
- 研究在HCC. lenvatinib耐药性背后的机制.
- 确定克服伦瓦提尼布耐药性的新型治疗点.
- 评估针对DNMT2-ACLY-NOTCH轴对HCC治疗的潜在目标.
主要方法:
- 全球m5C修饰水平在抗伦瓦替尼布的HCC细胞中进行了分析.
- 在耐药标本中评估了DNA甲基转移酶2 (DNMT2) 表达.
- 进行了体外和体内实验,以评估DNMT2下调的效果.
- 研究了DNMT2,Y盒结合蛋白1 (YBX1) 和腺三酸酸酶 (ACLY) mRNA之间的相互作用.
- 研究了痕信号通路的激活及其与细胞内乙-CoA和基因素乙化的关系.
- 在临床前模型中评估了与伦瓦提尼布联合使用ACLY的药理抑制.
主要成果:
- 伦瓦替尼抗性HCC细胞表现出较高的m5C修饰水平.
- 在耐药标本中,DNMT2被上调,与生存率差相关.
- DNMT2降低调节通过减少增殖和促进亡恢复了对lenvatinib的敏感性.
- DNMT2通过m5C修饰稳定了ACLY mRNA,激活了Notch路径.
- 在临床前模型中,ACLY和伦瓦替尼治疗的联合抑制降低了瘤负担.
结论:
- DNMT2-ACLY-NOTCH信号轴在HCC的伦瓦替尼抗性中发挥着至关重要的作用.
- 降低DNMT2的调节是一种有前途的策略,可以克服伦瓦提尼布耐药性.
- 针对ACLY和lenvatinib的组合疗法为HCC治疗提供了潜在的新方法.
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