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Erschienen in: Clinical Pharmacokinetics 2/2016

01.02.2016 | Review Article

Alternative Sampling Strategies for Cytochrome P450 Phenotyping

verfasst von: Pieter M. M. De Kesel, Willy E. Lambert, Christophe P. Stove

Erschienen in: Clinical Pharmacokinetics | Ausgabe 2/2016

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Abstract

Interindividual variability in the expression and function of drug metabolizing cytochrome P (CYP) 450 enzymes, determined by a combination of genetic, non-genetic and environmental parameters, is a major source of variable drug response. Phenotyping by administration of a selective enzyme substrate, followed by the determination of a specific phenotyping metric, is an appropriate approach to assess the in vivo activity of CYP450 enzymes as it takes into account all influencing factors. A phenotyping protocol should be as simple and convenient as possible. Typically, phenotyping metrics are determined in traditional matrices, such as blood, plasma or urine. Several sampling strategies have been proposed as an alternative for these traditional sampling techniques. In this review, we provide a comprehensive overview of available methods using dried blood spots (DBS), hair, oral fluid, exhaled breath and sweat for in vivo CYP450 phenotyping. We discuss the relation between phenotyping metrics measured in these samples and those in conventional matrices, along with the advantages and limitations of the alternative sampling techniques. Reliable phenotyping procedures for several clinically relevant CYP450 enzymes, including CYP1A2, CYP2C19 and CYP2D6, are currently available for oral fluid, breath or DBS, while additional studies are needed for other CYP450 isoforms, such as CYP3A4. The role of hair analysis for this purpose remains to be established. Being non- or minimally invasive, these sampling strategies provide convenient and patient-friendly alternatives for classical phenotyping procedures, which may contribute to the implementation of CYP450 phenotyping in clinical practice.
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Metadaten
Titel
Alternative Sampling Strategies for Cytochrome P450 Phenotyping
verfasst von
Pieter M. M. De Kesel
Willy E. Lambert
Christophe P. Stove
Publikationsdatum
01.02.2016
Verlag
Springer International Publishing
Erschienen in
Clinical Pharmacokinetics / Ausgabe 2/2016
Print ISSN: 0312-5963
Elektronische ISSN: 1179-1926
DOI
https://doi.org/10.1007/s40262-015-0306-y

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