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Jie Z, Qin S, Liu F, Xu D, Sun J, Qin G, Hou X, Xu P, Zhang W, Gao C, Lu J. Analysis on dynamic changes of etizolam and its metabolites and exploration of its development prospect using UPLC-Q-exactive-MS. J Pharm Biomed Anal 2024; 240:115936. [PMID: 38183733 DOI: 10.1016/j.jpba.2023.115936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/17/2023] [Accepted: 12/21/2023] [Indexed: 01/08/2024]
Abstract
As one of the most widely abused designer benzodiazepines in the world, etizolam has been found in many cases in many countries. In this study, UPLC-Q-Exactive-MS was used for the first time to establish a dynamic change model of etizolam and its metabolites in rats. Compared with previous studies, the detection sensitivity and reproducibility of the instrument were higher. In the experiment, we optimized the traditional pharmacokinetic model based on Gauss function. According to the significant difference of etizolam in the plasma elimination phase of rats, a new pharmacokinetic model based on Lorentz function was established to describe the dynamic changes of etizolam more rigorously, which made the error effects lower and the accuracy of the pharmacokinetic parameters was improved. At the same time, the pharmacokinetic parameters of etizolam were compared with four other designer benzodiazepines reported in previous studies in rats, and we found the direct reason for the popularity of etizolam in the NPS market and explored the future development of etizolam for the first time. In addition, 21 metabolites were found through rat experiments to effectively detect etizolam abuse for a long time, of which 4 metabolites had the longest detection window and could be used as long-acting metabolites for experiments, which greatly prolongs the detection window and extends the time range in which etizolam was detected in real cases. This study is the first to conduct a systematic and comprehensive study on the metabolism and pharmacokinetics of etizolam and find out the direct reason for the prevalence of etizolam abuse, and we also discuss the development trend of etizolam in the future market of new psychoactive substances, which is beneficial for forensic experts to assess the trend of drug abuse and can provide reference for relevant drug control and drug treatment.
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Affiliation(s)
- Zhaowei Jie
- School of Investigation, People's Public Security University of China, Beijing 100038, China
| | - Shiyang Qin
- Forensic Science Service of Beijing Public Security Bureau, Key Laboratory of Forensic Toxicology, Ministry of Public Security, Beijing 100192, China
| | - Fubang Liu
- School of Investigation, People's Public Security University of China, Beijing 100038, China
| | - Duoqi Xu
- Shanghai Key Laboratory of Forensic Medicine, Scientific Research Institute of Forensic Expertise, Shanghai 200063, China
| | - Jing Sun
- Forensic Science Service of Beijing Public Security Bureau, Key Laboratory of Forensic Toxicology, Ministry of Public Security, Beijing 100192, China
| | - Ge Qin
- School of Investigation, People's Public Security University of China, Beijing 100038, China
| | - Xiaolong Hou
- School of Investigation, People's Public Security University of China, Beijing 100038, China
| | - Peng Xu
- Key Laboratory of Drug Monitoring, Control and Anti drug Key Technologies of the Ministry of Public Security, Anti drug Information Technology Center of the Ministry of Public Security, Beijing 100193, China
| | - Wenfang Zhang
- Forensic Science Service of Beijing Public Security Bureau, Key Laboratory of Forensic Toxicology, Ministry of Public Security, Beijing 100192, China.
| | - Chunfang Gao
- School of Investigation, People's Public Security University of China, Beijing 100038, China.
| | - Jianghai Lu
- Drug and Food Anti-doping Laboratory, China Anti-Doping Agency, 1st Anding Road, Chaoyang, Beijing 100029, China.
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