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Updated: May 13, 2026

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
[Modulation of nuclear receptors on drug-metabolizing enzymes and transporters]
1Department of Drug Metabolism and Pharmacokinetics of Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
Abstract:
PXR, CAR and PPAR, widely distributed in the body, are important members of the nuclear receptors (NRs) family. The activities and gene expressions of drug-metabolizing enzymes (DMEs) and transporters can be regulated by the activation of NRs, which effect the drug disposition. Multidrug resistance (MDR) is the leading cause of failure in cancer therapy. NRs, including PXR, CAR and PPAR, were shown to regulate the expressions of DMEs and transporters involved in the drug metabolism and clearance, suggesting that the modulation of NRs can be considered as a new target to overcome MDR. This review described the research progress of NR family members PXR, CAR, PPAR and their transcriptional activation mechanism, the regulation of DMEs and transporters by NRs, which may provide a valuable reference for clinical medication and overcome of MDR.
Insights
Nuclear receptors (NRs) like PXR, CAR, and PPAR regulate drug metabolism and transport. Targeting these NRs offers a new strategy to overcome multidrug resistance (MDR) in cancer therapy.
Area of Science:
- Pharmacology
- Molecular Biology
- Biochemistry
Background:
- Nuclear receptors (NRs) are crucial regulators of drug disposition.
- Drug-metabolizing enzymes (DMEs) and transporters are key to drug metabolism and clearance.
- Multidrug resistance (MDR) is a major challenge in cancer treatment.
Purpose of the Study:
- To review the role of PXR, CAR, and PPAR in regulating DMEs and transporters.
- To explore the potential of NRs as a therapeutic target to overcome MDR.
- To provide insights into NR transcriptional activation mechanisms.
Main Methods:
- Literature review of research on PXR, CAR, and PPAR.
- Analysis of NR-mediated regulation of DMEs and transporters.
- Examination of NR transcriptional activation pathways.
Main Results:
- NRs, including PXR, CAR, and PPAR, significantly influence drug metabolism and transport.
- These NRs regulate the expression of key DMEs and transporters.
- Modulation of NRs presents a promising approach to combat MDR.
Conclusions:
- NRs play a critical role in drug disposition and MDR.
- Targeting NRs offers a novel strategy for overcoming therapeutic resistance.
- Further research into NR mechanisms can inform clinical medication strategies.
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