Identification of monoamine oxidase and cytochrome P450 isoenzymes involved in the deamination of phenethylamine-derived designer drugs (2C-series)
摘要:
In recent years, several compounds of the phenethyl amine-type (2C-series) have entered the illicit drug market as designer drugs. In former studies, the qualitative metabolism of frequently abused 2Cs (2C-B, 2C-I, 2C-D, 2C-E, 2C-T-2, 2C-T-7) was studied using a rat model. Major phase I metabolic steps were deamination and O-demethylation. Deamination to the corresponding aldehyde was the reaction, which was observed for all studied compounds. Such reactions could in principal be catalyzed by two enzyme systems: monoamine oxidase (MAO) and cytochrome P450 (CYP). The aim of this study was to determine the human MAO and CYP isoenzymes involved in this major metabolic step and to measure the Michaelis-Menten kinetics of the deamination reactions. For these studies, cDNA-expressed CYPs and MAOs were used. The formation of the aldehyde metabolite was measured using GC-MS after extraction. For all compounds studied, MAO-A and MAO-B were the major enzymes involved in the deamination. For 2C-D, 2C-E, 2C-T-2 and 2C-T-7, CYP2D6 was also involved, but only to a very small extent. Because of the isoenzymes involved, the 2Cs are likely to be susceptible for drug-drug interactions with MAO inhibitors. (c) 2006 Elsevier Inc. All rights reserved.
Convergent 18F-labeling and evaluation of N-benzyl-phenethylamines as 5-HT2A receptor PET ligands
作者:Ida Nymann Petersen、Jonas Villadsen、Hanne Demant Hansen、Anders A. Jensen、Szabolcs Lehel、Nic Gillings、Matthias M. Herth、Gitte M. Knudsen、Jesper L. Kristensen
DOI:10.1016/j.bmc.2016.08.056
日期:2016.11
Positron emission tomography (PET) investigations of the 5-HT2A receptor (5-HT2AR) system can be used as a research tool in diseases such as depression, Alzheimer's disease and schizophrenia. We have previously developed a C-11-labeled agonist PET ligand ([C-11]Cimbi-36), and the aim of this study was to identify a F-18-labeled analogue of this PET-ligand. Thus, we developed a convergent radiochemical approach giving easy access to 5 different F-18-labeled ligands structurally related to Cimbi-36 from a common F-18-labeled intermediate. After intravenous injection, all ligands entered the pig brain. However, since within-scan intervention with ketanserin, a known orthosteric 5-HT2A receptor antagonist, did not result in significant blocking, the radioligands seem unsuitable for neuroimaging of the 5-HT2AR in vivo. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis and Structure–Activity Relationships of <i>N</i>-Benzyl Phenethylamines as 5-HT<sub>2A/2C</sub> Agonists
作者:Martin Hansen、Karina Phonekeo、James S. Paine、Sebastian Leth-Petersen、Mikael Begtrup、Hans Bräuner-Osborne、Jesper L. Kristensen
DOI:10.1021/cn400216u
日期:2014.3.19
N-Benzyl substitution of 5-HT2A receptor agonists of the phenethylamine structural class of psychedelics (such as 4-bromo-2,5-dimethoxyphenethylamine, often referred to as 2C-B) confer a significant increase in binding affinity as well as functional activity of the receptor. We have prepared a series of 48 compounds with structural variations in both the phenethylamine and N-benzyl part of the molecule to determine the effects on receptor binding affinity and functional activity at 5-HT2A and 5-HT2c receptors. The compounds generally had high affinity for the 5-HT2A receptor with 8b having the highest affinity at 0.29 nM but with several other compounds also exhibiting subnanomolar binding affinities. The functional activity of the compounds was distributed over a wider range with lb being the most potent at 0.074 nM. Most of the compounds exhibited low to moderate selectivity (1- to 40-fold) for the 5-HT2A receptor in the binding assays, although one compound 6b showed an impressive 100-fold selectivity for the 5-HT2A receptor. In the functional assay, selectivity was generally higher with lb being more than 400-fold selective for the 5-HT2A receptor.
CATHINONE TEST
申请人:University of Technology Sydney
公开号:US20200348320A1
公开(公告)日:2020-11-05
A method of detecting the presence of a cathinone moiety in a sample, such as a suspected illicit drug sample, which comprises contacting the sample with a solution comprising neocuproine, a source of copper(II) and a catalyst and observing a colour change, where present, that correlates with the presence of cathinone. The method is operable at environmental temperature. Mechanical elements may be employed to accelerate the colour change if desired.
Identification of monoamine oxidase and cytochrome P450 isoenzymes involved in the deamination of phenethylamine-derived designer drugs (2C-series)
作者:Denis S. Theobald、Hans H. Maurer
DOI:10.1016/j.bcp.2006.09.022
日期:2007.1
In recent years, several compounds of the phenethyl amine-type (2C-series) have entered the illicit drug market as designer drugs. In former studies, the qualitative metabolism of frequently abused 2Cs (2C-B, 2C-I, 2C-D, 2C-E, 2C-T-2, 2C-T-7) was studied using a rat model. Major phase I metabolic steps were deamination and O-demethylation. Deamination to the corresponding aldehyde was the reaction, which was observed for all studied compounds. Such reactions could in principal be catalyzed by two enzyme systems: monoamine oxidase (MAO) and cytochrome P450 (CYP). The aim of this study was to determine the human MAO and CYP isoenzymes involved in this major metabolic step and to measure the Michaelis-Menten kinetics of the deamination reactions. For these studies, cDNA-expressed CYPs and MAOs were used. The formation of the aldehyde metabolite was measured using GC-MS after extraction. For all compounds studied, MAO-A and MAO-B were the major enzymes involved in the deamination. For 2C-D, 2C-E, 2C-T-2 and 2C-T-7, CYP2D6 was also involved, but only to a very small extent. Because of the isoenzymes involved, the 2Cs are likely to be susceptible for drug-drug interactions with MAO inhibitors. (c) 2006 Elsevier Inc. All rights reserved.