Abstract
Background
Ethyl glucuronide (EtG) and ethyl sulfate (EtS) are non-oxidative minor metabolites of ethanol. They are detectable in various body fluids shortly after initial consumption of ethanol and have a longer detection time frame than the parent compound. They are regarded highly sensitive and specific markers of recent alcohol uptake. This study evaluates the determination of EtG and EtS from dried blood spots (DBS), a simple and cost-effective sampling method that would shorten the time gap between offense and blood sampling and lead to a better reflectance of the actual impairment.
Methods
For method validation, EtG and EtS standard and quality control samples were prepared in fresh human heparinized blood and spotted on DBS cards, then extracted and measured by an LC-ESI-MS/MS method. Additionally, 76 heparinized blood samples from traffic offense cases were analyzed for EtG and EtS as whole blood and as DBS specimens. The results from these measurements were then compared by calculating the respective mean values, by a matched-paired t test, by a Wilcoxon test, and by Bland–Altman and Mountain plots.
Results and discussion
Calibrations for EtG and EtS in DBS were linear over the studied calibration range. The precision and accuracy of the method met the requirements of the validation guidelines that were employed in the study. The stability of the biomarkers stored as DBS was demonstrated under different storage conditions. The t test showed no significant difference between whole blood and DBS in the determination of EtG and EtS. In addition, the Bland–Altman analysis and Mountain plot confirmed that the concentration differences that were measured in DBS specimens were not relevant.
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References
Schmitt G, Aderjan R, Keller T, Wu M (1995) Ethyl glucuronide: an unusual ethanol metabolite in humans. Synthesis, analytical data, and determination in serum and urine. J Anal Toxicol 19(2):91–94
Skipper GE, Weinmann W, Thierauf A, Schaefer P, Wiesbeck G, Allen JP, Miller M, Wurst FM (2004) Ethyl glucuronide: a biomarker to identify alcohol use by health professionals recovering from substance use disorders. Alcohol Alcohol 39(5):445–449
Wurst FM, Skipper GE, Weinmann W (2003) Ethyl glucuronide—the direct ethanol metabolite on the threshold from science to routine use. Addiction 98(Suppl 2):51–61
Litten RZ, Bradley AM, Moss HB (2010) Alcohol biomarkers in applied settings: recent advances and future research opportunities. Alcohol Clin Exp Res 34(6):955–967
Substance Abuse and Mental Health Services Administration (SAMHSA) (2012) The role of biomarkers in the treatment of alcohol use disorders. SAMHSA Advisory 11 (2)
Schmitt G, Droenner P, Skopp G, Aderjan R (1997) Ethyl glucuronide concentration in serum of human volunteers, teetotalers, and suspected drinking drivers. J Forensic Sci 42(6):1099–1102
Halter CC, Dresen S, Auwaerter V, Wurst FM, Weinmann W (2008) Kinetics in serum and urinary excretion of ethyl sulfate and ethyl glucuronide after medium dose ethanol intake. Int J Legal Med 122(2):123–128
Hoiseth G, Bernard JP, Karinen R, Johnsen L, Helander A, Christophersen AS, Morland J (2007) A pharmacokinetic study of ethyl glucuronide in blood and urine: applications to forensic toxicology. Forensic Sci Int 172(2–3):119–124
Helander A, Bottcher M, Fehr C, Dahmen N, Beck O (2009) Detection times for urinary ethyl glucuronide and ethyl sulfate in heavy drinkers during alcohol detoxification. Alcohol Alcohol 44(1):55–61
Pragst F, Balikova MA (2006) State of the art in hair analysis for detection of drug and alcohol abuse. Clin Chim Acta 370(1–2):17–49
Pragst F, Rothe M, Moench B, Hastedt M, Herre S, Simmert D (2010) Combined use of fatty acid ethyl esters and ethyl glucuronide in hair for diagnosis of alcohol abuse: interpretation and advantages. Forensic Sci Int 196(1–3):101–110
Morini L, Colucci M, Ruberto MG, Groppi A (2012) Determination of ethyl glucuronide in nails by liquid chromatography tandem mass spectrometry as a potential new biomarker for chronic alcohol abuse and binge drinking behavior. Anal Bioanal Chem 402(5):1865–1870
Guthrie R, Susi A (1963) A simple phenylalanine method for detecting phenylketonuria in large populations of newborn infants. Pediatrics 32:338–343
De Jesus VR, Mei JV, Bell CJ, Hannon WH (2010) Improving and assuring newborn screening laboratory quality worldwide: 30-year experience at the Centers for Disease Control and Prevention. Semin Perinatol 34(2):125–133
Edelbroek PM, van der Heijden J, Stolk LM (2009) Dried blood spot methods in therapeutic drug monitoring: methods, assays, and pitfalls. Ther Drug Monit 31(3):327–336
van der Heijden J, de Beer Y, Hoogtanders K, Christiaans M, de Jong GJ, Neef C, Stolk L (2009) Therapeutic drug monitoring of everolimus using the dried blood spot method in combination with liquid chromatography–mass spectrometry. J Pharm Biomed Anal 50(4):664–670
Garcia Boy R, Henseler J, Mattern R, Skopp G (2008) Determination of morphine and 6-acetylmorphine in blood with use of dried blood spots. Ther Drug Monit 30(6):733–739
Jantos R, Veldstra JL, Mattern R, Brookhuis KA, Skopp G (2011) Analysis of 3,4-methylenedioxymetamphetamine: whole blood versus dried blood spots. J Anal Toxicol 35(5):269–273
Ingels AS, De Paepe P, Anseeuw K, Van Sassenbroeck D, Neels H, Lambert W, Stove C (2011) Dried blood spot punches for confirmation of suspected gamma-hydroxybutyric acid intoxications: validation of an optimized GC-MS procedure. Bioanalysis 3(20):2271–2281
Mei JV, Alexander JR, Adam BW, Hannon WH (2001) Use of filter paper for the collection and analysis of human whole blood specimens. J Nutr 131(5):1631S–1636S
McDade TW, Williams S, Snodgrass JJ (2007) What a drop can do: dried blood spots as a minimally invasive method for integrating biomarkers into population-based research. Demography 44(4):899–925
Li W, Tse FL (2010) Dried blood spot sampling in combination with LC-MS/MS for quantitative analysis of small molecules. Biomed Chromatogr 24(1):49–65
Kissinger PT (2011) Thinking about dried blood spots for pharmacokinetic assays and therapeutic drug monitoring. Bioanalysis 3(20):2263–2266
O'Broin SD, Kelleher BP, Gunter E (1995) Evaluation of factors influencing precision in the analysis of samples taken from blood spots on filter paper. Clin Lab Haematol 17(2):185–188
Holub M, Tuschl K, Ratschmann R, Strnadova KA, Muhl A, Heinze G, Sperl W, Bodamer OA (2006) Influence of hematocrit and localisation of punch in dried blood spots on levels of amino acids and acylcarnitines measured by tandem mass spectrometry. Clin Chim Acta 373(1–2):27–31
Abu-Rabie P, Denniff P, Spooner N, Brynjolffssen J, Galluzzo P, Sanders G (2011) Method of applying internal standard to dried matrix spot samples for use in quantitative bioanalysis. Anal Chem 83(22):8779–8786
Jones J, Jones M, Plate C, Lewis D (2011) The detection of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanol in human dried blood spots. Analytical Methods 3(5):1101–1106
Faller A, Richter B, Kluge M, Koenig P, Seitz HK, Thierauf A, Gnann H, Winkler M, Mattern R, Skopp G (2011) LC-MS/MS analysis of phosphatidylethanol in dried blood spots versus conventional blood specimens. Anal Bioanal Chem 401(4):1163–1166
Hernandez Redondo A, Korber C, Konig S, Langin A, Al-Ahmad A, Weinmann W (2012) Inhibition of bacterial degradation of EtG by collection as dried urine spots (DUS). Anal Bioanal Chem 402(7):2417–2424
German Society of Toxicological and Forensic Chemistry (GTFCh) (2009) Anforderungen an die Validierung von Analysenmethoden. T + K 76:185–208
Dresen S, Weinmann W, Wurst FM (2004) Forensic confirmatory analysis of ethyl sulfate—a new marker for alcohol consumption—by liquid-chromatography/electrospray ionization/tandem mass spectrometry. J Am Soc Mass Spectrom 15(11):1644–1648
Bland JM, Altman DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1(8476):307–310
Mantha S, Roizen MF, Fleisher LA, Thisted R, Foss J (2000) Comparing methods of clinical measurement: reporting standards for Bland and Altman analysis. Anesth Analg 90(3):593–602
Krouwer JS, Monti KL (1995) A simple, graphical method to evaluate laboratory assays. Eur J Clin Chem Clin Biochem 33(8):525–527
Ingels AS, Lambert WE, Stove CP (2010) Determination of gamma-hydroxybutyric acid in dried blood spots using a simple GC-MS method with direct “on spot” derivatization. Anal Bioanal Chem 398(5):2173–2182
Suyagh MF, Iheagwaram G, Kole PL, Millership J, Collier P, Halliday H, McElnay JC (2010) Development and validation of a dried blood spot-HPLC assay for the determination of metronidazole in neonatal whole blood samples. Anal Bioanal Chem 397(2):687–693
Keevil BG (2011) The analysis of dried blood spot samples using liquid chromatography tandem mass spectrometry. Clin Biochem 44(1):110–118
Acknowledgments
The authors would like to thank Korbinian Seitz (University of Bern) for language editing and the Swiss National Foundation for financial support.
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Hernández Redondo, A., Schroeck, A., Kneubuehl, B. et al. Determination of ethyl glucuronide and ethyl sulfate from dried blood spots. Int J Legal Med 127, 769–775 (2013). https://doi.org/10.1007/s00414-012-0815-2
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DOI: https://doi.org/10.1007/s00414-012-0815-2