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Annu Rev Genet. 1995;29:607-49.

Genetic analysis of the multidrug transporter.

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  • 1Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.


The analysis of how human cancers evade chemotherapy has revealed a rich variety of cell-based genetic changes resulting in drug resistance. One of the best studied of these genetic alterations is increased expression of an ATP-dependent plasma membrane transport system, known as P-glycoprotein, or the multidrug transporter. This transporter actively effluxes a large number of natural product, hydrophobic, cytotoxic drugs, including many important anticancer agents. This review focuses on the genetic and molecular genetic analysis of the human multidrug transporter, including structure-function analysis, pre- and posttranslational regulation of expression, the role of gene amplification in increased expression, and the properties of transgenic and "knock-out" mice. One important feature of the MDR gene is its potential for the development of new selectable vectors for human gene therapy.

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