ALOX15通过反应性氧物种介导的MAPK途径在多克索鲁比诱导的心脏毒性中调节铁
Xingang Sun1, Lu Chen2, Jie Han2
1Department of Cardiology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China.
Antioxidants & redox signaling
|June 2, 2025
概括
这项研究揭示了15-lipoxygenase-1 (ALOX15) 通过ferroptosis驱动化疗诱导的心脏毒性. 抑制ALOX15通过减少活性氧物种和减轻MAPK通路激活来保护心脏免受多克索鲁比损伤.
科学领域:
- 生物化学 生物化学
- 心脏病学 心脏病学
- 分子生物学分子生物学
背景情况:
- 多克索鲁比 (Dox) 是一种重要的化疗药物,但由于心脏毒性,其使用受到限制.
- 确切的Dox诱导心脏毒性 (DIC) 背后的机制尚未完全理解,尽管涉及铁.
- 脂质过氧化中的关键酶15-lipoxygenase-1 (ALOX15) 在DIC中的作用尚不清楚.
研究的目的:
- 调查ALOX15在Dox引起的心脏毒性的作用.
- 阐明ALOX15对DIC.有所贡献的分子机制.
主要方法:
- 在Dox处理的动物和细胞模型中评估ALOX15表达.
- 使用ALOX15抑制和基因沉默技术.
- 评估了脂质过氧化,铁灭菌标志物,心脏功能和反应性氧物种 (ROS) 水平.
- 研究了基因激活蛋白激酶 (MAPK) 信号通路的参与.
主要成果:
- 在DIC模型中,ALOX15表达被上调.
- ALOX15的抑制或沉默降低了Dox治疗患者的脂质过氧化,铁和心脏功能障碍.
- ALOX15 功能保护细胞因Dox和RSL3毒性而丧失功能.
- 通过ROS生成和MAPK通路激活,ALOX15调解了Dox诱导的铁亡.
结论:
- ALOX15在通过铁死调解Dox诱导的心脏毒性方面发挥着关键作用.
- ALOX15通过调节ROS生产和MAPK信号通路来调节铁亡.
- 准ALOX15是一个潜在的治疗策略,可以缓解Dox引起的心脏毒性.
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