TABLE 2

Inhibition of estradiol-17β-glucuronide metabolite formation in human microsomes or using yeast-expressed CYP 2C8

Thirty-minute incubations were performed using the indicated inhibitor concentrations and 1 μM P450 liver microsomes, or 0.5 μM expressed P450 and 50 μM substrate. Data are means of two independent determinations.



Concentration

Percentage Inhibition

Human Microsomes
CYP 2C8
μM
O2/CO gas 87
Miconazole 2 40
Sulfaphenazone 10 26
Furafylline 10 19
Quinidine 10 21
Bromocriptine 10 65 3
Ketoconazole 10 100
2 39 10
Chlorzoxazone 10 13
Quercetin 10 60 14
Paclitaxel
10
46
31