| Assay Method Information | |
| | In vitro CYP3A4 Inhibition Assay |
| Description: | Cytochrome P450 is a large and diverse group of enzymes that catalyze the oxidation of organic substances. Some members of the CYP family contribute to the elimination of ATRA by catalyzing its 4-hydroxylation in the mammalian liver and skin, including that of humans as well as swine. Applicant evaluated the potential RAMBA activity of several azoles using pig liver microsomes, a rich source of CYP activity, comprising many different CYP 450 isoforms. Therefore, this approach, while a reasonable way to assess CYP inhibitors with broad activities may or may not be the best way to discover RAMBAs with selectivity for the skin, which has a much more narrow complement of CYP expression. As understanding in this area has progressed, a more specific CYP inhibition assay can be used to provide better predictivity of activity in human skin. Nevertheless, this assay may still be used as a general predictor of overall CYP activity. |
| Affinity data for this assay | |
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