Development and characterization of a small electromembrane extraction probe coupled with mass spectrometry for real-time and online monitoring of in vitro drug metabolism

A small and very simple electromembrane extraction probe (EME-probe) was developed and coupled directly to electrospray ionization mass spectrometry (ESI-MS), and this system was used to monitor in real time in vitro metabolism by rat liver microsomes of drug substances from a small reaction (incuba...

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Veröffentlicht in:Analytical and bioanalytical chemistry 2014-01, Vol.406 (2), p.421-429
Hauptverfasser: Dugstad, Helene Bonkerud, Petersen, Nickolaj Jacob, Jensen, Henrik, Gabel-Jensen, Charlotte, Hansen, Steen Honoré, Pedersen-Bjergaard, Stig
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container_issue 2
container_start_page 421
container_title Analytical and bioanalytical chemistry
container_volume 406
creator Dugstad, Helene Bonkerud
Petersen, Nickolaj Jacob
Jensen, Henrik
Gabel-Jensen, Charlotte
Hansen, Steen Honoré
Pedersen-Bjergaard, Stig
description A small and very simple electromembrane extraction probe (EME-probe) was developed and coupled directly to electrospray ionization mass spectrometry (ESI-MS), and this system was used to monitor in real time in vitro metabolism by rat liver microsomes of drug substances from a small reaction (incubation) chamber (37 °C). The drug-related substances were continuously extracted from the 1.0 mL metabolic reaction mixture and into the EME-probe by an electrical potential of 2.5 V. The extraction probe consisted of a 1-mm long and 350-μm ID thin supported liquid membrane (SLM) of 2-nitrophenyl octyl ether. The drugs and formed metabolites where extracted through the SLM and directly into a 3 μL min −1 flow of 60 mM HCOOH inside the probe serving as the acceptor solution. The acceptor solution was directed into the ESI-MS-system, and the MS continuously monitored the drug-related substances extracted by the EME-probe. The extraction efficiency of the EME-probe was dependant on the applied electrical potential and the length of the SLM, and these parameters as well as the volume of the reaction chamber were set to the values mentioned above to avoid serious depletion from the reaction chamber (soft extraction). Soft extraction was mandatory in order not to affect the reaction kinetics by sample composition changes induced by the EME-probe. The EME-probe/MS-system was used to establish kinetic profiles for the in vitro metabolism of promethazine, amitriptyline and imipramine as model substances.
doi_str_mv 10.1007/s00216-013-7378-z
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Soft extraction was mandatory in order not to affect the reaction kinetics by sample composition changes induced by the EME-probe. The EME-probe/MS-system was used to establish kinetic profiles for the in vitro metabolism of promethazine, amitriptyline and imipramine as model substances.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>24196121</pmid><doi>10.1007/s00216-013-7378-z</doi><tpages>9</tpages></addata></record>
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subjects Amitriptyline - isolation & purification
Amitriptyline - metabolism
Analytical Chemistry
Animals
Biochemistry
Biotransformation
Challenges and New Directions in Analytical Sample Preparation
Chambers
Characterization and Evaluation of Materials
Chemical properties
Chemistry
Chemistry and Materials Science
Drugs
Electric potential
Electrochemical Techniques - methods
Electrodes
Ethers - chemistry
Extraction
Food Science
Imipramine - isolation & purification
Imipramine - metabolism
In vitro testing
Ionization
Laboratory Medicine
Male
Mass spectrometry
Mathematical models
Membranes, Artificial
Metabolism
Metabolites
Methods
Microsomes, Liver - metabolism
Monitoring/Environmental Analysis
Power supply
Promethazine - isolation & purification
Promethazine - metabolism
Rats
Rats, Sprague-Dawley
Research Paper
Sample preparation
Scientific imaging
Solid Phase Extraction - methods
Spectrometry, Mass, Electrospray Ionization
Time Factors
title Development and characterization of a small electromembrane extraction probe coupled with mass spectrometry for real-time and online monitoring of in vitro drug metabolism
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