Inhibit or Evade Multidrug Resistance P-Glycoprotein in Cancer Treatment
Deepali Waghray1, Qinghai Zhang1
1Department of Integrative Structural and Computational Biology , The Scripps Research Institute , La Jolla , California 92037 , United States.
Abstract:
Multidrug resistance (MDR) is a major cause of failure in cancer chemotherapy. P-glycoprotein (P-gp), a promiscuous drug efflux pump, has been extensively studied for its association with MDR due to overexpression in cancer cells. Several P-gp inhibitors or modulators have been investigated in clinical trials in hope of circumventing MDR, with only limited success. Alternative strategies are actively pursued, such as the modification of existing drugs, development of new drugs, or combination of novel drug delivery agents to evade P-gp-dependent efflux. Despite the importance and numerous studies, these efforts have mostly been undertaken without a priori knowledge of how drugs interact with P-gp at the molecular level. This review highlights and discusses progress toward and challenges impeding drug development for inhibiting or evading P-gp in the context of our improved understanding of the structural basis and mechanism of P-gp-mediated MDR.
Insights
Multidrug resistance (MDR) in cancer chemotherapy is often caused by P-glycoprotein (P-gp). Understanding P-gp
Area of Science:
- Oncology
- Molecular Biology
- Drug Discovery
Background:
- Multidrug resistance (MDR) significantly limits the efficacy of cancer chemotherapy.
- P-glycoprotein (P-gp) is a key efflux pump overexpressed in cancer cells, contributing to MDR.
- Previous strategies to inhibit or evade P-gp have shown limited clinical success.
Purpose of the Study:
- To review progress and challenges in developing drugs to overcome P-gp-mediated MDR.
- To highlight the importance of molecular-level understanding of drug-P-gp interactions.
- To discuss strategies for inhibiting or evading P-gp efflux.
Main Methods:
- Literature review of studies on P-gp inhibitors and modulators.
- Analysis of recent advancements in understanding P-gp structure and function.
- Discussion of novel drug development and delivery strategies.
Main Results:
- Despite extensive research, clinical success in circumventing P-gp-mediated MDR remains limited.
- Improved understanding of P-gp's structural basis and mechanism is crucial for effective drug development.
- Alternative strategies like drug modification and novel delivery systems are being explored.
Conclusions:
- Overcoming P-gp-mediated MDR requires a deeper molecular understanding of drug interactions.
- Future drug development must leverage structural insights into P-gp.
- Continued research into novel strategies is essential for improving cancer chemotherapy outcomes.
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