Scientific article

The AmpliChip CYP450 test: cytochrome P450 2D6 genotype assessment and phenotype prediction

Published inPharmacogenomics journal, vol. 9, no. 1, p. 34-41
Publication date2009

Polymorphisms of the cytochrome P450 2D6 (CYP2D6) gene affecting enzyme activity are involved in interindividual variability in drug efficiency/toxicity. Four phenotypic groups are found in the general population: ultra rapid (UM), extensive (EM), intermediate (IM) and poor (PM) metabolizers. The AmpliChip CYP450 test is the first genotyping array allowing simultaneous analysis of 33 CYP2D6 alleles. The main aim of this study was to evaluate the performance of this test in CYP2D6 phenotype prediction. We first verified the AmpliChip CYP450 test genotyping accuracy for five CYP2D6 alleles routinely analysed in our laboratory (alleles 3,4,5,6, x N; n=100). Results confirmed those obtained by real-time PCR. Major improvements using the array are the detection of CYP2D6 intermediate alleles and identification of the duplicated alleles. CYP2D6 phenotype was determined by assessing urinary elimination of dextromethorphan and its metabolite dextrorphan and compared to the array prediction (n=165). Although a low sensitivity of UM prediction by genotyping was observed, phenotype prediction was optimal for PM and satisfying for EM and IM.

  • Cytochrome P-450 CYP2D6/genetics
  • Dextromethorphan/pharmacokinetics/urine
  • Dextrorphan/pharmacokinetics/urine
  • Gene Frequency
  • Genotype
  • Humans
  • Metabolic Clearance Rate/genetics
  • Oligonucleotide Array Sequence Analysis
  • Pharmacogenetics/methods
  • Phenotype
  • Predictive Value of Tests
  • Reverse Transcriptase Polymerase Chain Reaction
Citation (ISO format)
REBSAMEN, M C. et al. The AmpliChip CYP450 test: cytochrome P450 2D6 genotype assessment and phenotype prediction. In: Pharmacogenomics journal, 2009, vol. 9, n° 1, p. 34–41. doi: 10.1038/tpj.2008.7
Main files (1)
Article (Accepted version)
ISSN of the journal1470-269X

Technical informations

Creation05/20/2009 4:18:00 PM
First validation05/20/2009 4:18:00 PM
Update time03/14/2023 3:05:22 PM
Status update03/14/2023 3:05:22 PM
Last indexation01/15/2024 6:27:56 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack