铜过载促进子宫癌细胞中的铁亡,通过上调HMOX1的表达
Chengcheng Zhao1, Tianming Wang1, Yingfei Lu1
1Central Laboratory, Nanjing Jiangning Hospital, Nanjing, 211100, Jiangsu, China.
Discover oncology
|August 14, 2025
概括
埃莱斯克洛莫尔加铜通过上调HMOX1来诱导宫癌细胞中的铁亡,从而提供了潜在的新疗法. 这项研究揭示了宫癌中铜代谢的改变及其与细胞死亡途径的联系.
科学领域:
- 细胞死亡途径 细胞死亡途径
- 癌症生物学 癌症生物学
- 铜的新陈代谢
背景情况:
- 型亡是一种新型调节的细胞死亡途径,在癌症中具有治疗潜力.
- 宫癌细胞表现出对铁亡的抵抗力,这是已知的细胞死亡机制.
- 埃莱斯克洛莫尔 (ES) 诱导了依赖铜的铁,但其在宫癌中的作用仍然未被探索.
研究的目的:
- 为了研究 elesclomol (ES) 和铜 (Cu2+) 对宫癌细胞中铁亡的作用.
- 探索ES-Cu2+治疗宫癌的基础分子机制.
- 为了阐明铜代谢和宫癌中的铁亡之间的关系.
主要方法:
- 在宫癌组织中分析与铜代谢相关的基因表达 (ATP7A,ATP7B).
- 用ES和Cu2+治疗宫癌细胞,然后评估细胞增殖,死亡,活性氧物种和铁含量.
- 评估铁灭菌标记物 (GPX4,HMOX1,FTH1,TFRC) 和对铁灭菌抑制剂 (ferrostatin-1,DFO) 的反应.
- 基因敲除HMOX1以评估其在ES-Cu2+诱导影响中的作用.
主要成果:
- 在宫癌组织中观察到ATP7A和ATP7B的表达减少.
- 治疗ES-Cu2+抑制了宫癌细胞的增殖,促进了细胞死亡,但没有诱导亡.
- ES-Cu2+治疗增加了活性氧物种和Fe2+水平,并降低了GPX4的表达.
- 在ES-Cu2+治疗后,HMOX1和FTH1的表达增加,而TFRC则下降.
- 铁酶抑制剂减弱了ES-Cu2+诱导的GPX4下调,而HMOX1倒置减轻了这种效应.
- 在宫癌组织中,HMOX1被上调,与ATP7B负相关.
结论:
- 铜代谢在宫癌组织中发生显著的变化.
- 与ES-Cu2+联合治疗有效诱导子宫癌细胞中的铁亡,主要通过HMOX1上调.
- 这项研究为cuproptosis和ferroptosis之间的相互作用提供了新的见解,表明了宫癌的潜在治疗策略.
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