[Up-to-date approaches to clinical estimate of phenotype of multiple drug resistance associated with function of ABC-transporters in human solid tumors].

The data on the discovery, specific features and evolution of the aftereffects of functioning in the cells of the ABC-transporters Pgp, MRP and BCRP, the markers of multiple drug resistance (MDRABC), are discussed. The results of the estimate of the MDRABC phenotype of human solid tumors were critically analyzed using different methodic approaches. It was shown that the frequency of the MDRABC phenotype detection by expression of the genes, encoding the ABC-transporter synthesis, was higher than that in detection of transport proteins in the cell. It was concluded that the only adequate clinical method for diagnosis of the MDRABC phenotype could be differential estimate of the functional activity of the ABC-transporters controlling not only the drug release to the cell, but also the drug intracellular compartmentization or division between the cytoplasm and nucleus.