代谢
最近,涉及新型阿片类药物的不良事件数量持续增加,包括死亡,为法医和医疗界带来了额外的持续挑战。确定新兴新型阿片类药物可能会很困难,由于检测窗口和未知的代谢概况而变得复杂。在这项研究中,使用了人肝微粒体来生成U-47700和U-49900的体外代谢概况。生成的代谢物通过SCIEX TripleTOF 5600+四级飞行时间质谱仪进行分析,所得数据文件使用MetabolitePilot进行处理。通过分析在U-47700或U-49900过量服用案例中收集到的真实人尿样本来验证了确定的代谢物。总共,U-47700在尿样中确定了四个代谢物,而U-49900确定了五个代谢物。确定了N-Desmethyl-U-47700为U-47700的主要代谢物。亲本U-47700在所有尿样中都被识别出来。在获得标准参考材料后,首次在本次研究中确认了N-Desmethyl-U-47700和N,N-didesmethyl-U-47700的结构。确定了N-Desethyl-U-49900为U-49900微粒体培养后的主要代谢物,而N,N-didesethyl-N-desmethyl-U-49900在尿样中含量最丰富。在U-47700和U-49900之间发现了相似的代谢转化,产生了一个共同的代谢物和同分异构体物种。在涉及U-47700或U-49900的案件中,应考虑这些现象。这是首次使用人肝微粒体绘制U-47700和U-49900的代谢概况的研究,也是首次报告涉及U-49900和案例分析的案件文献。
Recently, the number of adverse events, including death, involving novel opioids has continued to increase, providing additional and sustained challenges for forensic and medical communities. Identification of emerging novel opioids can be challenging, compounded by detection windows and unknown metabolic profiles. In this study, human liver microsomes were used for the generation of in vitro metabolic profiles of U-47700 and U-49900. Generated metabolites were analyzed via a SCIEX TripleTOF 5600+ quadrupole time-of-flight mass spectrometer and resulting data files were processing using MetabolitePilot. Characterized metabolites were verified in vivo by analysis of authentic human urine specimens collected after analytically confirmed cases of overdose involving U-47700 or U-49900. In total, four metabolites were identified and present in urine specimens for U-47700, and five metabolites for U-49900. N-Desmethyl-U-47700 was determined to be the primary metabolite of U-47700. Parent U-47700 was identified in all urine specimens. N-Desmethyl-U-47700 and N,N-didesmethyl-U-47700 were structurally confirmed for the first time during this study following acquisition of standard reference material. N-Desethyl-U-49900 was determined to be the primary metabolite of U-49900 following microsomal incubations, while N,N-didesethyl-N-desmethyl-U-49900 was the most abundant in a urine specimen. Similarities in metabolic transformation were identified between U-47700 and U-49900, resulting in a common metabolite and isomeric species. These phenomena should be considered in cases involving U-47700 or U-49900. This study is the first to map the metabolic profiles of U-47700 and U-49900 using human liver microsomes, as well as the first to report any literature involving U-49900 and analysis of case specimens.
来源:Hazardous Substances Data Bank (HSDB)