Activated Pregnenolone X-Receptor Is a Target for Ketoconazole and Its Analogs

Abstract excerpt

PURPOSE: Variations in biotransformation and elimination of microtubule-binding drugs are a major cause of unpredictable side effects during cancer therapy. Because the orphan receptor, pregnenolone X-receptor (PXR), coordinately regulates the expression of paclitaxel metabolizing and transport enzymes, controlling this process could improve therapeutic outcome. EXPERIMENTAL DESIGN: In vitro RNA-, protein-, and...

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