Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/22772
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Type: Journal article
Title: Enantioselective assay for the determination of perhexiline enantiomers in human plasma by liquid chromatography
Author: Davies, B.
Herbert, M.
Culbert, J.
Pyke, S.
Coller, J.
Somogyi, A.
Milne, R.
Sallustio, B.
Citation: Journal of Chromatography. B, Analytical Techniques in the Biomedical and Life Sciences, 2006; 832(1):114-120
Publisher: Elsevier Science BV
Issue Date: 2006
ISSN: 1570-0232
1873-376X
Statement of
Responsibility: 
Benjamin J. Davies, Megan K. Herbert, Julie A. Culbert, Simon M. Pyke, Janet K. Coller, Andrew A. Somogyi, Robert W. Milne and Benedetta C. Sallustio
Abstract: Effective use of the antianginal agent perhexiline is difficult because saturable metabolism by the polymorphic cytochrome P450 2D6 (CYP2D6) isoform produces elevated plasma perhexiline concentrations that have been associated with serious hepatic and neurological toxicity. Perhexiline is marketed for therapeutic use as a racemate and there is evidence for differences in the disposition of its enantiomers. The current study describes an enantioselective HPLC-fluorescent method utilising pre-column derivatization with (R)-(−)-1-(1-napthyl)ethyl isocyanate. Following derivatization, the enantiomers are resolved on a C18 column with gradient elution using a mobile phase composed of methanol and water. The method described is suitable for the quantification of (+)- and (−)-perhexiline in human plasma following clinical doses and demonstrates sufficient sensitivity, accuracy and precision between 0.01 and 2.00 mg/l for each enantiomer, with intra-assay coefficients of variation and bias <20% at 0.01 mg/l and <10% at 2.00 mg/l, and inter-assay coefficients of variation and biases <15% at 0.03 mg/l and <10% at 0.40 and 0.75 mg/l. The application of this method to plasma samples collected from a patient treated with perhexiline revealed that (+)-perhexiline concentrations were higher than (−)-perhexiline concentrations, confirming the stereoselective disposition of perhexiline. The current study describes an enantioselective method that utilises pre-column formation of fluorescent diastereomers that are resolved on a C18 HPLC column using a gradient of methanol and water.
Keywords: Enantiomer separation; HPLC; perhexiline
Description: Copyright © Elsevier B.V. All rights reserved.
RMID: 0020060120
DOI: 10.1016/j.jchromb.2005.12.046
Description (link): http://www.elsevier.com/wps/find/journaldescription.cws_home/643040/description#description
Appears in Collections:Pharmacology publications

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