通过调节GPX4-介导的铁亡,SNX3促进多克索鲁比诱导的心肌病变
Shuai Huang1, Fan Zou1, Hao Zhou2
1Department of Cardio-Thoracic Surgery, The Third Affiliated Hospital, Sun Yat-Sen University, 510630, Guangzhou, China.
International journal of medical sciences
|July 15, 2024
概括
排序nexin 3 (SNX3) 缺乏,通过抑制铁亡,保护心脏免受多克索鲁比诱导的心肌病变. 在小鼠中消去SNX3使心脏功能正常化,并在多克索鲁治疗后减少损伤标志物.
科学领域:
- 心脏病学 心脏病学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- doxorubicin 是一种强大的化疗剂,具有已知的心脏毒性副作用.
- 驱动多克索鲁比诱导心肌病的精确分子途径尚未完全理解.
- 铁死是一种受调节的细胞死亡形式,与多克索鲁比心脏毒性有关.
研究的目的:
- 为了研究排序nexin 3 (SNX3) 在多克索鲁比诱导心肌病的作用.
- 通过ferroptosis调节来确定SNX3剥离是否可以通过doksorubicin诱导的心肌损伤进行保护.
- 阐明SNX3,铁和多克索鲁比辛心脏毒性之间的分子机制.
主要方法:
- 产生特定于心肌细胞的SNX3淘汰小鼠.
- 对野生型和SNX3缺乏的小鼠给予多克索鲁比辛.
- 评估心脏功能,损伤生物标志物,炎症和氧化应激.
- 对铁灭菌标记物 (GPX4),内质网膜 (ER) 应激和线粒体功能的分子分析.
- 在SNX3-贫乏心肌细胞中使用埃拉斯 (ferroptosis诱导剂) 的体外研究.
主要成果:
- 在多克索鲁比暴露后,SNX3删除使心脏收缩和放松功能正常化.
- SNX3 缺乏减少了心脏损伤生物标志物,炎症和氧化应激.
- 德克索鲁比辛治疗激活了GPX4依赖性铁,由SNX3损失阻止.
- SNX3 缺乏缓解了多克索鲁比诱导的细胞死亡,ER 压力和线粒体功能障碍.
- 埃拉斯在SNX3贫乏心肌细胞中加剧了多克索鲁比的有害作用.
结论:
- 在调解多克索鲁比诱导的心脏毒性方面,SNX3起着至关重要的作用.
- 缺少SNX3可以防止多克索鲁比诱导的心肌功能障碍.
- 通过SNX3调节GPX4相关铁亡是多克索鲁比心脏毒性的关键机制.
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