Reassessing P-glycoprotein and Drug Resistance
Author Information
Author(s): S.B. Kaye
Primary Institution: CRC Department of Medical Oncology, CRC Beatson Laboratories, University of Glasgow, UK
Hypothesis
The resistant cell overexpresses an energy-dependent membrane-bound efflux pump (P-gp) protecting it from toxic natural products.
Conclusion
P-glycoprotein may play a role in cancer cell behavior beyond just drug resistance.
Supporting Evidence
- P-glycoprotein is found in many normal tissues and tumors.
- High levels of P-glycoprotein expression are associated with increased metastatic potential in cancer cells.
- Modulators of P-glycoprotein may affect normal physiological processes.
Takeaway
Some cancer cells have a special pump that helps them avoid medicine that is supposed to kill them, and this pump might also help them spread in the body.
Potential Biases
There may be other factors influencing treatment outcomes that are not related to drug resistance.
Limitations
The study discusses the complexity of drug resistance and the need for careful interpretation of P-gp expression in relation to treatment outcomes.
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