在癌细胞中,Zeb1通过调节脂原酶表达和脂化合物成分来调节EMT/可塑性相关的铁灭敏感性
Annemarie Schwab1, Zhigang Rao2, Jie Zhang2
1Department of Experimental Medicine 1, Nikolaus-Fiebiger Center for Molecular Medicine, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Erlangen, Germany.
Nature cell biology
|July 15, 2024
概括
经历表皮-介质细胞转换 (EMT) 的癌细胞变得更容易受到细胞死亡途径铁亡的影响. EMT转录因子Zeb1通过改变脂质代谢来驱动这种脆弱性,这表明了新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 皮质-介质细胞过渡 (EMT) 对癌症转移和治疗耐药性至关重要.
- 介质细胞易受铁,一种依赖铁的细胞死亡途径.
- 对于EMT在调节铁灭症敏感性的作用仍然不完全理解.
研究的目的:
- 为了研究EMT激活和癌细胞中ferroptosis易感性之间的联系.
- 确定分子机制,特别是Zeb1的作用,调解这种关系.
- 探索针对侵袭性癌症中的铁亡的治疗策略.
主要方法:
- 使用TGFβ刺激和产生耐治疗癌症细胞系来诱导EMT.
- 通过细胞活力试验评估铁灭症易感性.
- 通过定量PCR和西式涂抹,通过量化脂成分和测量关键脂原酶 (SCD,FASN,FADS2,ELOVL5,ACSL4) 的表达来分析脂质代谢.
- 药理上抑制了醇-CoA脱酶1 (SCD) 和脂肪酸脱酶2 (FADS2).
主要成果:
- 不同形式的EMT激活,包括TGFβ刺激和获得的治疗耐药性,显著增加癌细胞对铁亡的敏感性.
- 这种较高的铁灭敏感性取决于上皮细胞-介质细胞过渡转录因子Zeb1.1.
- 泽布1调节脂质酶的表达,改变了亲铁素多不和脂肪酸和细胞保护性单不和脂肪酸的平衡.
- 对SCD和FADS2的药理抑制可以操纵铁灭的敏感性,特别是在具有高Zeb1表达的癌细胞中.
结论:
- 在癌细胞中,EMT激活促进铁灭的易感性,转录因子Zeb1.1的介导下.
- Zeb1通过调节参与脂肪酸脱和延长的脂质代谢酶来调节铁灭的敏感性.
- 向像SCD这样的脂质酶,与铁灭激活剂结合,代表了对高Zeb1表达的侵袭性癌症的有前途的治疗方法.
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