| Assay Method Information | |
| | Inhibition Assay |
| Description: | CYP17 activity was assayed according to the following procedure. Solutions of each test compound and isozyme inhibitor (ketoconazole) were separately prepared at concentrations of 2700, 540, 90, 18, 3, 0.6 and 0.1 uM by serial dilution with DMSO:ACN (50:50 v/v). The individual test compound and isozyme inhibitor solutions were then diluted 20-fold with deionized water (50:950 v/v) to concentrations of 135, 27, 4.5, 0.9, 0.15, 0.03 and 0.005 uM. The percent of organic solvent attributable to the test compound or inhibitor mixture in the final reaction mixture is 1%. Pooled rat testicular microsome suspension (20 mg/mL) was diluted with phosphate buffer to obtain a 1.25 mg/mL suspension. A solution of NADPH was prepared in phosphate buffer at a concentration of 2.5x. A stock solution of the substrate was prepared in DMSO:MeCN (50:50 v/v), mixed, and diluted in phosphate buffer to obtain a single solution containing the substrate at 5 uM. |
| Affinity data for this assay | |
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