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由DNA损伤引起的衰老与乳腺癌细胞的代谢重编程有关
Neena George1, Manjunath B Joshi2, Kapaettu Satyamoorthy3
1Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576 104, India.
Biochimie
|September 27, 2023
概括
细胞衰老是由乳腺癌细胞的DNA损伤引发的,改变了新陈代谢. 这项研究确定了用多克索鲁比或辐射治疗的MCF-7细胞的关键代谢变化,提供了治疗点.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 代谢研究研究 代谢研究
背景情况:
- 细胞衰老,一种不可逆转的生长停止状态,是由各种压力引起的,包括DNA损伤.
- 衰老在癌症中起着复杂的作用,影响瘤发生,复发和治疗反应.
- 代谢重编程对于癌细胞维持衰老状态至关重要.
研究的目的:
- 为了研究由电离辐射和多克索鲁比辛诱导的衰老的MCF-7乳腺瘤细胞中的代谢重编程.
- 为了确定与乳腺癌中DNA损伤介导的衰老相关的特定代谢变化.
主要方法:
- 使用电离辐射和多克索鲁比辛在MCF-7细胞中诱导衰老.
- 对衰老标志物的评估,包括γH2AX,与衰老相关的β-galactosidase,p21和p16.
- 非向的细胞外代谢组分析,以分析代谢变化.
主要成果:
- 这两种治疗都诱导了衰老,由增加的DNA双链断裂和衰老标志物证实.
- 德克索鲁比治疗导致卡尼丁和泛酸的减少和S-adenosylhomocysteine的增加,这表明ROS介导的损伤和线粒体功能受损.
- 电离辐射暴露导致肌酸水平降低,表明氧化应激增加.
结论:
- 多克索鲁比和电离辐射诱导早期衰老的MCF-7乳腺癌细胞中明显的代谢重编程.
- 特定的代谢物,如卡尼丁,泛酸,S-adenosylhomocysteine和肌酸是诱导衰老期间代谢变化的关键影响者.
- 了解这些代谢变化为管理乳腺癌衰老提供了潜在的治疗点.
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