PT  - JOURNAL ARTICLE
AU  - Girault, Igor
AU  - Rougier, Nathalie
AU  - Chesné, Christophe
AU  - Lidereau, Rosette
AU  - Beaune, Philippe
AU  - Bieche, Ivan
AU  - de Waziers, Isabelle
TI  - SIMULTANEOUS MEASUREMENT OF 23 ISOFORMS FROM THE HUMAN CYTOCHROME P450 FAMILIES 1 TO 3 BY QUANTITATIVE REVERSE TRANSCRIPTASE-POLYMERASE CHAIN REACTION
AID  - 10.1124/dmd.105.005173
DP  - 2005 Dec 01
TA  - Drug Metabolism and Disposition
PG  - 1803--1810
VI  - 33
IP  - 12
4099  - http://dmd.aspetjournals.org/content/33/12/1803.short
4100  - http://dmd.aspetjournals.org/content/33/12/1803.full
SO  - Drug Metab Dispos2005 Dec 01; 33
AB  - Drug metabolism in humans is essentially performed by three cytochrome P450 (P450) families (1 to 3), including 23 isoforms. The expression of these P450s is highly variable, and the rate and nature of the metabolites produced depend on the nature and the concentration of individual isoforms. P450 expression pattern is therefore a necessary tool to evaluate the effects of a given drug on P450 expression, its potential toxicity, and eventual interference with other drugs administered concomitantly. This pattern provides a general outline of the induction/repression effects of drugs leading to further mechanistic studies. A real-time quantitative reverse transcription-polymerase chain reaction (RT-PCR) assay was developed to evaluate the overall P450 expression pattern and measure human CYP1 to CYP3 mRNAs involved in drug metabolism. Our RT-PCR-based P450 mRNA assay enables us to quantify P450s rapidly with high specificity, a single annealing temperature, and low amounts of biological sample. All 23 single assays were validated by assessing the effects (induction or repression) of known inducers (ethanol, 3-methylcholanthrene, rifampicin, dexamethasone, phenobarbital) on P450 expression in human primary hepatocytes. Since this method may be used to determine human P450 expression in any human tissue or cell culture, it is a valuable tool for reliable prediction of drug safety, drug toxicity, and drug-drug interference. The American Society for Pharmacology and Experimental Therapeutics