硫福拉诱导HeLa细胞中的短暂反应性氧物种介导的DNA损伤
Sakine Kobayashi1, Seiya Nishiba1, Chinatsu Sato1
1School of Science and Technology, Gunma University, Kiryu, Japan.
Genes to cells : devoted to molecular & cellular mechanisms
|December 27, 2024
概括
硫福拉 (SFN) 可能通过减少谷氨 (GSH) 和增加活性氧物种 (ROS) 来导致DNA损伤. 这项研究表明,SFN在HeLa细胞中暂时诱导单链断裂 (SSB),可能是通过氧化应激.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 硫福拉 (SFN) 是一种来自Brassicaceae植物的化合物,具有抗氧化,诱导亡和放射敏感性.
- SFN的细胞毒性与DNA损伤诱导和修复抑制有关,包括单端双链断裂 (DSB).
- 由SFN引起的单链断裂 (SSB) 积累的确切机制尚不清楚.
研究的目的:
- 研究SFN在HeLa细胞中诱导SSB的机制.
- 为了确定参与SFN处理后SSB积累的因素.
- 阐明氧化应激在SFN诱导的DNA损伤中的作用.
主要方法:
- 用不同度的SFN对待HeLa细胞.
- 进行了测试,以测量DNA拓酶I活性,降低形式的谷氨 (GSH) 水平和细胞活力.
- 添加了 Askorbic 酸,以评估其保护作用.
- 聚ADP- рибо (PAR) 的积累被观察到作为SSB修复的指标.
主要成果:
- SFN没有抑制DNA拓酶I的活性.
- SFN治疗导致了依赖度的GSH水平下降.
- 在SFN处理的细胞中,甲酸部分挽救了细胞活力.
- 聚ADP-ribose) 积累表明SFN处理的细胞中早期的SSB修复激活.
结论:
- SFN可能会在HeLa细胞中诱导短暂的SSB,可能由活性氧物种 (ROS) 介导.
- 通过SFN减少GSH有助于增加氧化应激,促进SSB的形成.
- 这些发现为SFN.的DNA损伤机制提供了洞察力.
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