Metabolism of Nine Synthetic Cannabinoid Receptor Agonists Encountered in Clinical Casework: Major in vivo Phase I Metabolites of AM-694, AM-2201, JWH-007, JWH-019, JWH-203, JWH-307, MAM-2201, UR-144 and XLR-11 in Human Urine Using LC-MS/MS.

Abstract:

BACKGROUND:`Herbal mixtures` containing synthetic cannabinoid receptor agonists (SCRAs) are promoted as legal alternative to marihuana and are easily available via the Internet. Keeping analytical methods for the detection of these SCRAs up-to-date is a continuous challenge for clinicians and toxicologists due to the high diversity of the chemical structures and the frequent emergence of new compounds. Since many SCRAs are extensively metabolized, analytical methods used for urine testing require previous identification of the major metabolites of each compound. OBJECTIVE:The aim of this study was to identify the in vivo major metabolites of nine SCRAs (AM- 694, AM-2201, JWH-007, JWH-019, JWH-203, JWH-307, MAM-2201, UR-144, XLR-11) for unambiguous detection of a drug uptake by analysis of urine samples. METHOD:Positive urine samples from patients of hospitals, detoxification and therapy centers as well as forensic-psychiatric clinics were analyzed by means of liquid chromatography-tandem mass spectrometry (LC-MS/MS) and liquid chromatography-quadrupole time-of-flight mass spectrometry (LCqToF- MS) for investigation of the major in vivo metabolites. RESULTS:For all investigated SCRAs, monohydroxylation, dihydroxylation and/or formation of the Nhexanoic/ pentanoic acid metabolites were among the most abundant metabolites detected in human urine samples. Substitution of the fluorine atom was observed to be an important metabolic reaction for compounds carrying an N-(5-fluoropentyl) side chain. N-Dealkylated metabolites were not detected in vivo. CONCLUSION:The investigated metabolites facilitate the reliable detection of drug uptake by analysis of urine samples. For distinction between uptake of the fluorinated and the non-fluorinated analogs, the N-(4-hydroxypentyl) metabolite of the non-fluorinated analog was identified as a useful analytical target and consumption marker.

journal_name

Curr Pharm Biotechnol

authors

Hutter M,Broecker S,Kneisel S,Franz F,Brandt SD,Auwarter V

doi

10.2174/1389201019666180509163114

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

144-162

issue

2

eissn

1389-2010

issn

1873-4316

pii

CPB-EPUB-90312

journal_volume

19

pub_type

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