Combination of experimental and in silico methods for the assessment of the phototransformation products of the antipsychotic drug/metabolite Mesoridazine
作者:Marcelo L. Wilde、Jakob Menz、Christoph Leder、Klaus Kümmerer
DOI:10.1016/j.scitotenv.2017.08.040
日期:2018.3
tests (OECD 301 D and 301F) were applied to MESO and the mixture of TPs present after 256min of photolysis. Most of TPs were not biodegraded, demonstrating their tendency to persist in aquatic environments. The ecotoxicity towards Vibrio fischeri showed a decrease in toxicity during the photolysis process. The in silico QSAR tools QSARINS and US-EPA PBT profiler were applied for the screening of TPs
缺乏对环境中药物代谢产物的命运和影响的研究令人担忧。代谢产物作为其母体化合物进入水生环境,并经历生物和非生物过程。在这方面,光解起着重要作用。这项研究结合了实验和计算机模拟的定量构效关系(QSAR)方法,以评估美索达嗪(MESO)的命运和作用,美索达嗪是一种具有药理活性的人药和抗精神病药噻达嗪的代谢产物,其转化产物是通过氙气灯照射。256分钟后,MESO·苯磺酸盐(50mgL-1)的光降解分别达到了一次消除和矿化的90.4%和6.9%。灯(200-600nm)发射的光子通量为169.55Jcm-2。液相色谱-高分辨率质谱(LC-HRMS)检测了16种TPs,并基于MSn碎片图谱提出了结构。主要的转化反应是亚砜氧化,羟基化,脱氢和亚砜消除。证明了MESO向硫代哒嗪的反转化。将有氧生物降解测试(OECD 301 D和301F)应用于MESO,并在256min的光解后存在TP的混合物。多数TPs