Cytochrome P450 bio-affinity detection coupled to gradient HPLC: On-line screening of affinities to cytochrorne P4501A2 and 2D6

J. Kool, S.M. van Liempd, S. Harmsen, J. Beckman, D.A. van Elswijk, J.N.M. Commandeur, H. Irth, N.P.E. Vermeulen

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Here we describe novel on-line human CYP1A2 and CYP2D6 Enzyme Affinity Detection (EAD) systems coupled to gradient HPLC. The use of the systems lies in the detection of individual inhibitory ligands in mixtures (e.g. metabolic mixtures or herbal extracts) towards two relevant drug metabolizing human CYPs. The systems can rapidly detect individual compounds in mixtures with affinities to CYP1A2 or 2D6. The HPLC-EAD systems were first evaluated and validated in flow injection analysis mode. IC50 values of known ligands for both CYPs, tested both in flow injection and in HPLC mode, were well comparable with those measured in microplate reader formats. Both EAD systems were also connected to gradient HPLC and used to screen known compound mixtures for the presence of CYP1A2 and 2D6 inhibitors. Finally, the on-line CYP2D6 EAD system was used to screen for the inhibitory activities of stereoisomers of a mixture of five methylenedioxy-alkylamphetamines (XTC analogs) on a chiral analytical column. © 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)49-58
Number of pages10
JournalJournal of Chromatography B
Volume858
Issue number1-2
Early online date17 Aug 2007
DOIs
Publication statusPublished - 15 Oct 2007

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