代谢
一个卟啉/过氧亚硝酸盐生物模拟系统被用来研究过氧亚硝酸盐诱导的茚[1,2,3-cd]芘(IND)的代谢。代谢物通过高效液相色谱与电喷雾离子化串联质谱鉴定为OH-IND、IND-醌和2NO2-IND。通过在不同阶段停止反应,我们发现IND首先转化为IND-醌和2NO2-IND,然后转化为OH-IND。包括Ames试验和细胞转化实验在内的突变分析显示,经过过氧亚硝酸盐/Fe(III)卟啉系统的活化后,突变性增强。结果还表明,在代谢活化后,2NO2-IND和IND-醌在多环芳烃的突变性中发挥了关键作用。
A porphyrin/peroxynitrite biomimetic system was used to study the metabolism of indeno[1,2,3-cd]pyrene (IND) induced by peroxynitrite. The metabolites were identified using high-performance liquid chromatography coupled with electro-spray ionization tandem mass spectrometry as OH-IND, IND-quinone and 2NO2-IND. By stopping the reaction at different stages, we discovered that IND was first transformed to IND-quinone and 2NO2-IND, which were then transformed to OH-IND. Mutation assays including Ames tests and cell transformation experiments showed enhancement of the mutagenicity after the activation by the peroxynitrite/Fe(III)porphyrin system. The results also showed that 2NO2-IND and IND-quinone played key roles in the mutagenicity of PAHs after metabolic activation.
来源:Hazardous Substances Data Bank (HSDB)