A potential new metabolite of gamma-hydroxybutyrate: sulfonated gamma-hydroxybutyric acid

Detection of gamma-hydroxybutyric acid (GHB) became crucial in many clinical and forensic settings due to its increasing use for recreational purposes and drug-facilitated sexual assault. Its narrow window of detection of about 3-12 h in urine represents a major problem. Analogous to ethyl glucuroni...

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Hauptverfasser: Hanisch, Stephanie (VerfasserIn) , Stachel, Nicole (VerfasserIn) , Skopp, Gisela (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2016
In: International journal of legal medicine
Year: 2015, Jahrgang: 130, Heft: 2, Pages: 411-414
ISSN:1437-1596
DOI:10.1007/s00414-015-1235-x
Online-Zugang:Verlag, Volltext: https://doi.org/10.1007/s00414-015-1235-x
Verlag, Volltext: https://link.springer.com/article/10.1007%2Fs00414-015-1235-x
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Verfasserangaben:Stephanie Hanisch, Nicole Stachel, Gisela Skopp

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520 |a Detection of gamma-hydroxybutyric acid (GHB) became crucial in many clinical and forensic settings due to its increasing use for recreational purposes and drug-facilitated sexual assault. Its narrow window of detection of about 3-12 h in urine represents a major problem. Analogous to ethyl glucuronide, the recently identified GHB-glucuronide exhibits a longer window of detection than the parent drug. It appeared reasonable that a sulfonated metabolite of GHB (GHB-SUL) will also be formed. Due to the lack of an appropriate standard, GHB was incubated with a human liver cytosolic fraction to produce GHB-SUL. Following development of a liquid chromatography/tandem mass spectrometry (LC-MS/MS) assay to measure GHB and GHB-SUL, authentic urine samples (n = 5) were tested for GHB-SUL. These investigations revealed detectable signals of both GHB and GHB-SUL, strongly indicating that GHB is not only glucuronidated but also sulfonated. Given that sulfonated metabolites generally have longer half-life times than the corresponding free drugs, GHB-SUL may serve as a biomarker of GHB misuse along with its glucuronide. 
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