Avermectins inhibit multidrug resistance of tumor cells
| Autor: | Tamara S. Novik, L. N. Kublik, N V Ermakova, Vera V. Shaposhnikova, Yuri N. Korystov, Mosin Vladimir A, T S Sterlina, Maria Kh. Levitman, Drinyaev Viktor A, Kruglyak Elena B |
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| Rok vydání: | 2003 |
| Předmět: |
Male
Vincristine Paclitaxel Cell Survival Drug Evaluation Preclinical Biology Pharmacology Rhodamine 123 Fluorescence Russia chemistry.chemical_compound Mice Cell Line Tumor medicine Animals Humans Avermectin Cisplatin Ivermectin Dose-Response Relationship Drug Leukemia P388 Drug Synergism Fluoresceins Drug Resistance Multiple Calcein Multiple drug resistance Drug Combinations chemistry Cell culture Cyclosporine Efflux Cell Division medicine.drug |
| Zdroj: | European journal of pharmacology. 493(1-3) |
| ISSN: | 0014-2999 |
| Popis: | The modification of the sensitivity of Hep-2 and P388 tumor cells to taxol and vincristine, substrates of multidrug resistance proteins, by naturally occurring avermectins and the effect of avermectins on the accumulation of calcein in cells and the efflux of rhodamine 123 were studied. While avermectins did not affect the sensitivity of tumor cells to hydrogen peroxide and cisplatin, they significantly enhanced the sensitivity of cells of both wild-type and resistant strains to taxol and vincristine. The coefficients of modification for resistant strains were substantially higher. Avermectins suppressed the efflux of rhodamine 123 from cells and increased the accumulation of calcein in cells. The relative inhibitory activity of avermectins depended on the cell type and on the substrate of multidrug resistance proteins whose transport they suppressed (vincristine, taxol, rhodamine 123, calcein acetoxymethyl ester). The least active was avermectin B1 or ivermectin; the most active avermectins varied depending on the substrate and the cell type. In the case of vincristine transport, the most active avermectin was almost by one order of magnitude more effective than the traditional inhibitor of multidrug resistance cyclosporin A. This property of avermectins can be used in tumor therapy by combining application of avermectins with antitumor preparations, the substrates of multidrug resistance proteins. |
| Databáze: | OpenAIRE |
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