通过 Src 介导的 PHB2 酸化通过肝细胞癌中的心素分离破坏了线粒体晶状体
Zhehua Shao1, Xinnuo Yang2, Binben Wang3
1Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
Redox biology
|February 10, 2026
概括
Src 激酶通过酸化禁忌素2 (PHB2) 触发肝细胞癌 (HCC) 的生长,破坏线粒体结构并促进代谢转变. 针对这种酸化可能会提供新的HCC治疗策略.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 在瘤学瘤学.
背景情况:
- 肝细胞癌 (HCC) 呈现线粒体功能障碍,包括氧化还原失衡和无组织的晶状体.
- 在HCC中这种线粒体功能障碍的分子驱动因素在很大程度上是未知的.
研究的目的:
- 阐明分子机制,将氧化应激与线粒体功能障碍和HCC中的代谢重编程联系起来.
- 确定关键的监管事件和潜在的治疗目标.
主要方法:
- 研究了Src酶和禁素2 (PHB2) 酸化在HCC中的作用.
- 利用生物化学分析,基于细胞的实验和异种移植模型.
- 采用了耐化和耐化PHB2突变物来评估功能后果.
主要成果:
- 在氧化应激下,Src酶在Y34和Y77酸化PHB2,破坏其心脂蛋白相互作用和PHB1/2复合体.
- 这导致OMA1激活,过度的OPA1裂变,严重的形重塑和电子输送链功能受损.
- 线粒体功能障碍促使新陈代谢转向糖解,增强HCC瘤的生长.
- 抗酸化PHB2突变体逆转了这些影响,恢复了线粒体的完整性并抑制了瘤的进展.
结论:
- Src介导的PHB2酸化起到氧化还原敏感开关的作用,通过PHB2-心脂蛋白-晶状体轴驱动HCC代谢重编程.
- 这种酸化事件代表了HCC的可用药物的脆弱性,HCC是一种具有有限治疗选择的恶性瘤.
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