罗斯马林酸是一种天然的多,通过NADH介导的氧化DNA损伤具有潜在的亲氧化风险
Hatasu Kobayashi1, Yuichiro Hirao1,2, Shosuke Kawanishi3
1Department of Environmental and Molecular Medicine, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu, 514-8507, Mie, Japan.
概括
罗斯马林酸 (RA) 通过铜和NADH氧化还原循环诱导氧化DNA损伤. 这一过程产生了活性氧物种,导致DNA链断裂和基因修饰,特别是在低RA度下.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 氧化压力研究研究 氧化压力研究
背景情况:
- 罗斯马林酸 (RA) 具有健康益处,但可以诱导金属介导的活性氧物种 (ROS) 和DNA损伤.
- 由于RA引起的DNA损伤的确切机制,特别是它与金属的相互作用,仍然不太清楚.
- 这项研究调查了RA及其类似物异酸的金属介导DNA损伤潜力.
研究的目的:
- 阐明罗斯马林酸诱导金属介导氧化DNA损伤的机制.
- 研究铜,NADH和特定ROS在RA引起的DNA损伤中的作用.
- 为了比较RA的DNA损伤效应及其类型的异酸.
主要方法:
- 用RA和异酸在金属离子 (Cu,II,Fe,III) 的存在下对隔离的小牛胸腺DNA和P标记的DNA进行处理.
- 定量 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) 的形成,作为氧化 DNA 损伤的标志物.
- 使用 piperidine 处理和特定位点裂变分析的 DNA 裂变和基质修饰的分析.
- 使用ROS (catalase,methional) 清除剂,铜化剂 (bathocuproine) 和超氧化物失调酶 (SOD) 的抑制研究.
主要成果:
- 带有Cu (II) 的RA显著增加了8-oxodG的形成,表明氧化DNA损伤,而Fe (III) 则没有观察到这种效应.
- 在RA中,catechol组参与了8-oxodG的形成,而NADH显著增强了RA引起的损伤.
- RA加Cu(II) 导致DNA链断裂和基修饰,涉及H2O2,Cu(I),以及除基基 (•OH) 之外的ROS,具有特定位置的损伤模式.
结论:
- 从生理上相关的RA度诱导氧化DNA损伤在隔离的DNA通过氧化还原循环与铜和NADH.
- 该机制涉及Cu ((I) 和H2O2的生成,导致由ROS介导的氧化DNA损伤,而不是OH.
- 通过减少RA衍生的基因,NADH显著放大氧化DNA损伤,特别是在RA度低的情况下.
关键词:
8-oxo-7,8-dihydro-2-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-8-oxo-7,8-dihydro-2-deoxyguanosine-8-oxo-7,8-dihydro-2-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-8-oxo-7,8-dihydro-2-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine-deoxyguanosine铜铜 铜铜 铜铜造成的DNA损伤是DNA损伤.它们是NADH和NADH.有反应性氧物种的反应性氧物种.罗斯马林酸是一种酸.相关概念视频
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