Genetic basis of multidrug resistance of tumor cells |
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Authors: | Susan E Kane Ira Pastan Michael M Gottesman |
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Institution: | (1) Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, 20892 Bethesda, Maryland;(2) Present address: Division of Surgery, City of Hope Medical Center, 91010 Duarte, California;(3) Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, 20892 Bethesda, Maryland |
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Abstract: | Multidrug resistance in animal cells is defined as the simultaneous resistance to a variety of compounds which appear to be structurally and mechanistically unrelated. One type of multidrug resistance is characterized by the decreased accumulation of hydrophobic natural product drugs, a phenotype which is mediated by an ATP-dependent integral membrane multidrug transporter termed P-glycoprotein or P170. The gene coding for P170 is calledMDR. The nucleotide-binding domain of P-glycoprotein shares sequence homology with a family of bacterial permease ATP-binding components. In addition, P170 as a whole is structurally very similar to a number of prokaryotic and eukaryotic proteins believed to be involved in transport activities. This review summarizes our current knowledge of the molecular biology and clinical significance ofMDR expression and P-glycoprotein transport activity, as well as some theories about the function of this protein in normal cells. |
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Keywords: | Chemotherapy ATP drug transport colchicine actinomycin D doxorubicin vinblastine vincristine introns evolution P-glycoprotein transmembrane domains MDR1 gene |
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