Characterization of rat liver microsomal metabolites of AM-630, a potent cannabinoid receptor antagonist, by high-performance liquid chromatography/electrospray ionization tandem mass spectrometry

Journal of Mass Spectrometry : JMS
Qiang ZhangGuangdi Wang

Abstract

The in vitro metabolism of AM-630 was studied by high-performance liquid chromatography coupled with tandem mass spectrometry. AM-630 is an aminoalkylindole analogue that behaves primarily as a potent CB2-selective antagonist. In this study, 17 metabolic products were identified that resulted from the incubation of AM-630 in rat liver microsome preparations. Six metabolic pathways were proposed to account for all detected metabolites: (1) o-demethylation of the methoxyphenyl group, (2) morpholinyl ring opening, (3) hydroxylation on the methoxy/hydroxyl phenyl ring, (4) hydroxylation on the indole ring, (5) hydroxylation on the morpholine ring and (6) loss of the morpholine ring leading to metabolites containing either a hydroxylated or a carboxylated alkyl terminal. Three metabolites were identified as morpholinyl ring-opening products: M1, M6 and M13. Six metabolites (M2-M5, M7 and M8) were proposed to be the products of o-demethylation, hydroxylation on the methoxyphenyl group or the morpholinyl ring, dehydration following morpholinyl ring monohydroxylation, or a combination of the above metabolic pathways. The remaining eight metabolites were attributed to a pathway involving the loss of the morpholine ring at various points...Continue Reading

Citations

Aug 15, 2013·Rapid Communications in Mass Spectrometry : RCM·Nik De BrabanterPeter Van Eenoo
Jun 15, 2010·European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences·Qiang ZhangGuangdi Wang
Oct 27, 2005·British Journal of Cancer·B P NutleyF I Raynaud
Jun 13, 2020·Critical Reviews in Toxicology·Vera L AlvesJosé S Câmara
Nov 8, 2012·Therapeutic Drug Monitoring·Markus R Meyer, Frank T Peters
Dec 24, 2004·Drug Metabolism and Disposition : the Biological Fate of Chemicals·Qiang ZhangGuangdi Wang

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