铁上的结直肠癌利用Heme-Complex II轴抵抗氧化细胞死亡
bioRxiv : the preprint server for biology
|November 24, 2025
概括
结肠直肠癌细胞利用铁来生长,但可以死于铁过载. 一种新的血糖酸脱酶 (SDH) - 共酶Q (CoQ) 途径通过排毒氧化应激来帮助这些细胞在有毒铁水平下生存.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 结肠直肠癌 (CRC) 细胞表现出高度依赖铁的扩散.
- 高水平的细胞内铁通常具有细胞毒性,这就在富含铁的环境中对CRC细胞生存提出了疑问.
- 铁,一种依赖于铁的细胞死亡,是已知的途径,但其在CRCin vivo中铁诱导的细胞死亡中的作用尚未完全理解.
研究的目的:
- 研究结直肠癌细胞耐受和利用富含铁的环境的机制.
- 确定参与缓冲CRC中铁诱导的氧化应激的新途径.
- 探索血红素酸脱酶 (SDH) -辅酶Q (CoQ) 轴在CRC细胞存活中的作用.
主要方法:
- 多个omics的配置文件.
- 通过CRISPR查进行查.
- 在活体中,小鼠模型.
- 生物化学测定 生物化学测定
主要成果:
- 在CRC细胞中发现了一种新型的依赖于血红素的酸脱酶 (SDH) -Coenzyme Q (CoQ) 轴.
- 这个轴使CRC细胞能够通过降低CoQ.通过降低CoQ.缓冲铁诱导的氧化应激.
- 降低的CoQ作为一种捕捉激素的抗氧化剂,在线粒体和血膜上排毒脂质反应性氧物种 (ROS).
- 这种途径独立于或与法定铁灭调节剂并行运作.
结论:
- 结肠直肠癌细胞选择代谢途径,包括SDH-CoQ轴,以在有毒铁条件下生存.
- 这种血红-SDH-CoQ通路对于CRC中铁诱导的氧化应激排毒至关重要.
- 这些发现揭示了结直肠癌与铁代谢和氧化应激管理相关的新疗法脆弱性.
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