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Updated: May 29, 2026

Expression, Detergent Solubilization, and Purification of a Membrane Transporter, the MexB Multidrug Resistance Protein
Published on: December 3, 2010
[Transmembrane transporters ABCC - structure, function and role in multidrug resistance of cancer cells]
Sylwia Dębska1, Agata Owecka, Urszula Czernek
1Klinika Chemioterapii Nowotworów Katedry Onkologii UM w Łodzi, Szpital Specjalistyczny im. M. Kopernika w Łodzi. sylwia.debska@o2.pl
Abstract:
Resistance to cytotoxic drugs is a significant problem of systemic treatment of cancers. Apart from drug inactivation, changes in target enzymes and proteins, increased DNA repair and suppression of apoptosis, an important mechanism of resistance is an active drug efflux from cancer cells. Drug efflux across the cell membrane is caused by transport proteins such as ABC proteins (ATP-binding cassette). This review focuses on the ABCC protein subfamily, whose members are responsible for multidrug cross-resistance of cancer cells to cytotoxic agents. The authors discuss the structure of ABCC proteins, their physiological function and diseases provoked by mutations of respective genes, their expression in many different malignancies and its connection with resistance to anticancer drugs, as well as methods of reversion of such resistance.
Insights
Cancer cells resist cytotoxic drugs through active drug efflux, primarily mediated by ATP-binding cassette (ABC) proteins. This review examines the ABCC subfamily
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Context:
- Cytotoxic drug resistance is a major challenge in cancer chemotherapy.
- Active drug efflux via transport proteins contributes significantly to treatment failure.
- The ATP-binding cassette (ABC) transporter superfamily plays a critical role in cellular drug transport.
Purpose:
- To review the role of the ABCC protein subfamily in multidrug resistance in cancer.
- To discuss the structure, function, and disease relevance of ABCC proteins.
- To explore strategies for overcoming ABCC-mediated drug resistance.
Summary:
- The ABCC protein subfamily is implicated in multidrug cross-resistance in cancer cells.
- These transporters facilitate the active efflux of cytotoxic agents out of cancer cells.
- Understanding ABCC protein function is crucial for developing effective cancer therapies.
Impact:
- Provides insights into a key mechanism of cancer drug resistance.
- Highlights the ABCC subfamily as a potential therapeutic target.
- Informs the development of strategies to revert multidrug resistance and improve patient outcomes.
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