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Updated: Jul 23, 2026

Expression, Detergent Solubilization, and Purification of a Membrane Transporter, the MexB Multidrug Resistance Protein
Published on: December 3, 2010
[Multidrug resistance mediated by membrane P-glycoprotein in acute myeloid leukemia]
1Department of Hematology, The Second Teaching Hospital, Shanxi Medical University, Taiyuan 030001, China. lpsu588@sohu.com
Abstract:
A key issue in the treatment of acute leukemia is the development of resistance to chemotherapeutic drugs. Several mechanisms may account for this phenomenon, including failure of the cell to undergo apoptosis in response to chemotherapy, or failure of the drug to reach and/or affect its intracellular target. This review focuses on the latter mechanisms, and on intracellular drug transport resistance mechanisms in particular. Expression of the ATP-binding cassette (ABC) transporter P-glycoprotein (P-gp) has generally been reported to correlate with prognosis in acute myeloid leukemia (AML). Additionally, of more controversial, expression of the ABC transporter multidrug resistance protein (MRP) and the vault-transporter lung resistance protein (LRP) have been correlated with the outcome in AML.
Insights
Drug resistance in acute leukemia is a major challenge. This review examines how intracellular drug transport, particularly the role of transporters like P-glycoprotein (P-gp), contributes to treatment failure in acute myeloid leukemia (AML).
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Chemotherapeutic drug resistance is a significant obstacle in treating acute leukemia.
- Mechanisms include impaired apoptosis and reduced intracellular drug efficacy.
- This review specifically addresses intracellular drug transport resistance.
Purpose of the Study:
- To review the mechanisms of intracellular drug transport resistance in acute leukemia.
- To discuss the role of specific ATP-binding cassette (ABC) transporters in multidrug resistance.
- To explore the correlation between transporter expression and patient outcomes in acute myeloid leukemia (AML).
Main Methods:
- Literature review focusing on intracellular drug transport mechanisms.
- Analysis of studies investigating ATP-binding cassette (ABC) transporters, including P-glycoprotein (P-gp), multidrug resistance protein (MRP), and lung resistance protein (LRP).
- Examination of correlations between transporter expression and clinical outcomes in acute myeloid leukemia (AML).
Main Results:
- Expression of P-glycoprotein (P-gp) is generally linked to poorer prognosis in AML.
- Expression of multidrug resistance-associated protein (MRP) and lung resistance protein (LRP) also shows a correlation with AML outcomes, though this is more debated.
- Intracellular drug transport mechanisms are critical factors in chemotherapy resistance.
Conclusions:
- Intracellular drug transport, mediated by transporters like P-gp, MRP, and LRP, plays a crucial role in acute leukemia treatment failure.
- Understanding these mechanisms is vital for developing strategies to overcome drug resistance in AML.
- Targeting these transporters may offer new therapeutic avenues for improving patient outcomes.
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