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1D Proton NMR Spectroscopic Determination of Ethanol and Ethyl Glucuronide in Human Urine

  • Kim, Siwon (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Lee, Minji (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Yoon, Dahye (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Lee, Dong-Kye (Department of Forensic Chemistry, National Forensic Service Southern District Office) ;
  • Choi, Hye-Jin (Department of Forensic Chemistry, National Forensic Service Southern District Office) ;
  • Kim, Suhkmann (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
  • 투고 : 2013.03.08
  • 심사 : 2013.05.20
  • 발행 : 2013.08.20

초록

Forensic and legal medicine require reliable data to indicate excessive alcohol consumption. Ethanol is oxidatively metabolized to acetate by alcohol dehydrogenase and non-oxidatively metabolized to ethyl glucuronide (EtG), ethyl sulfate (EtS), phosphatidylethanol, or fatty acid ethyl esters (FAEE). Oxidative metabolism is too rapid to provide biomarkers for the detection of ethanol ingestion. However, the non-oxidative metabolite EtG is a useful biomarker because it is stable, non-volatile, water soluble, highly sensitive, and is detected in body fluid, hair, and tissues. EtG analysis methods such as mass spectroscopy, chromatography, or enzyme-linked immunosorbent assay techniques are currently in use. We suggest that nuclear magnetic resonance (NMR) spectroscopy could be used to monitor ethanol intake. As with current conventional methods, NMR spectroscopy doesn't require complicated pretreatments or sample separation. This method has the advantages of short acquisition time, simple sample preparation, reproducibility, and accuracy. In addition, all proton-containing compounds can be detected. In this study, we performed $^1H$ NMR analyses of urine to monitor the ethanol and EtG. Urinary samples were collected over time from 5 male volunteers. We confirmed that ethanol and EtG signals could be detected with NMR spectroscopy. Ethanol signals increased immediately upon alcohol intake, but decreased sharply over time. In contrast, EtG signal increased and reached a maximum about 9 h later, after which the EtG signal decreased gradually and remained detectable after 20-25 h. Based on these results, we suggest that $^1H$ NMR spectroscopy may be used to identify ethanol non-oxidative metabolites without the need for sample pretreatment.

키워드

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피인용 문헌

  1. Meeting report: The biology of genomes and proteomes vol.37, pp.7, 2015, https://doi.org/10.1007/s13258-015-0305-2
  2. Automated Analysis of Large-Scale NMR Data Generates Metabolomic Signatures and Links Them to Candidate Metabolites vol.18, pp.9, 2013, https://doi.org/10.1021/acs.jproteome.9b00295