Table 1

Correlation of ketamine N-demethylase activity with P450 isoform-specific activities in seven human liver microsomes

Isoform-specific ActivitiesSpearman Correlation Coefficient (r)
Nifedipine oxidase activity (CYP3A4)0.8991-150
Coumarin 7-hydroxylase activity (CYP2A6)0.725
Phenacetin deethylase activity (CYP1A2)0.551
S-Mephenytoin hydroxylase activity (CYP2C19)0.4
Dextromethorphan demethylase activity (CYP2D6)−0.3
Chlorzoxazone hydroxylase activity (CYP2E1)0.371
S-Mephenytoin N-demethylase activity (CYP2B6)0.8861-150
Tolbutamide hydroxylase activity (CYP2C9)0.029
  • 1-150p < 0.05.