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在DNA中胺的三倍能量
Francisco Bosca1, Virginie Lhiaubet-Vallet, M Consuelo Cuquerella
1Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia, Avda de los Naranjos s/n, 46022 Valencia, Spain.
Journal of the American Chemical Society
|May 11, 2006
概括
诺夫洛克萨 (NFX) 通过形成丁氨酸二次体 (T<>T) 引起DNA损伤,与其衍生物ANFX不同. 这种光敏化与NFX有关.
科学领域:
- 摄影化学的使用.
- 分子生物学分子生物学
- 药品安全 药品安全
背景情况:
- 诺夫洛克萨 (NFX) 是一种诺基诺类抗生素.
- 光毒性是一些药物的已知副作用,包括NFX.
- NFX诱导的DNA损伤的机制需要进一步阐明.
研究的目的:
- 调查诺夫洛克萨 (NFX) 和其衍生物N(4') - 乙诺夫洛克萨 (ANFX) 的光敏化特性.
- 为了确定三重能量在NFX诱导的DNA损伤中的作用.
- 为了估计DNA中胺的三倍能量.
主要方法:
- 用T4内核酶V对DNA进行酶性处理.
- 凝电泳检测DNA单链断裂的方法.
- 使用双和乙烯衍生物的三倍能量转移火实验来估计NFX和ANFX的三倍能量.
主要成果:
- 诺夫洛克萨 (NFX) 能使DNA中胺二元体 (T<>T) 的形成变得光敏感.
- N(4') - 乙norfloxacin (ANFX) 不会诱导T<>T的形成.
- 估计的三重能量:NFX为273kJ/mol,ANFX为268kJ/mol. 这两种能量均为三重能量.
- 估计DNA中胺的三重能量为270kJ/mol.
结论:
- NFX形成T<>T的光敏化能力归因于其三倍能量.
- 由于ANFX没有形成T<>T,这表明它具有较低的三倍能量或改变的光化学.
- 丁胺在DNA中的三倍能量为引起T<>T的光敏化剂提供了一个基准.
相关概念视频
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