活细胞采用乌比奎丁-保护体系统和核酸切割修复途径去除反应性氧物种诱导的DNA-蛋白交叉链接 (ROS-DPCs)
bioRxiv : the preprint server for biology
|February 23, 2026
概括
活性氧物种 (ROS) 诱导的DNA-蛋白质交叉链接 (DPC) 是有毒的,而且人们对其了解甚少. 这项研究确定了参与ROS-DPC形成的蛋白质,并揭示了细胞修复机制,提供了潜在的治疗策略.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 活性氧物种 (ROS) 造成的氧化DNA损伤导致衰老和疾病.
- 由ROS诱导的DNA-蛋白质交叉链 (DPC) 是有毒的,但表征不佳.
- 了解ROS-DPC的形成和修复对于细胞健康至关重要.
研究的目的:
- 在人体细胞中描述ROS诱导的DPC.
- 为了阐明ROS-DPC去除的机制.
- 探索预防ROS-DPC形成的治疗策略.
主要方法:
- 过氧化 (H2O2) 治疗人类纤维瘤 (HT1080) 细胞.
- 基于质谱的蛋白质组学用于识别DPC形成中的蛋白质.
- 分析DNA复制和转录在DPC检测和修复中的作用.
主要成果:
- 已经确定了100多种参与ROS-DPC形成的细胞蛋白,其中许多与DNA代谢有关.
- DNA复制和转录有助于ROS-DPC检测.
- 在ROS-DPC去除过程中,无素-蛋白质系统 (UPS),SPRTN金属蛋白酶和核酸切除修复 (NER) 是关键.
- 一种谷氨 (GSH) 模拟物 (ψ-GSH) 阻断了ROS-DPC的形成.
结论:
- 活细胞拥有识别和去除ROS诱导的DPC的机制.
- 在修复这些病变方面,SPRTN和NER起着至关重要的作用.
- 谷氨类型显示出预防ROS-DPC相关疾病的潜力.
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