Table 2

The in vitro CYP-specific enzyme activities (picomoles per minute per milligram of microsomal protein) of the characterized human hepatic microsomes used in the NVP hydroxylation assays

Specific Activity2-bMicrosomes2-a
23567910111213
EROD43.547.728.19.9240.426.214.095.311.331.7
CNDM7053471568347189738
CH1997849721080710120230958271249
EFCOD124756322755100ND3124057
MND103545425867100532914555
TMH275106133226187118151120103158
MPH15655278113287223437
DODM10927281<55814474231182176
CZH6860163025602960197039802300171014501910
TSTH10100125011401250024302040100063908613260
LAH8907708401100770740480530310790
  • ND = Not detected

  • 2-a Microsome identification number provided by Human Biologics, Inc. (Phoenix, AZ).

  • 2-b EROD = 7-Ethoxyresorufin-O-deethylase (CYP1A)

  • CNDM = Caffeine N-demethylase (CYP1A2)

  • CH = Coumarin 7-hydroxylase (CYP2A6)

  • EFCOD = furafylline-inhibited 7-ethoxy-4-trifluoromethyl coumarin-O-deethylase (CYP2B6)

  • MND = S-Mephenytoin N-demethylase (CYP2B6)

  • TMH = Tolbutamide methyl-hydroxylase (CYP 2C9)

  • MPH = S-Mephenytoin 4-hydroxylase (CYP2C19)

  • DODM = Dextromethorphan O-demethylase (CYP2D6)

  • CZH = Chlorzoxazone 6-hydroxylase (CYP2E1)

  • TSTH = Testosterone 6β-hydroxylase (CYP3A4)

  • LAH = Lauric acid 12-hydroxylase (CYP4A)