| Literature DB >> 1976451 |
K Mizuno1, Y Furuhashi, O Maeda, M Iwata, T Misawa, M Kawai, T Kano, Y Tomoda.
Abstract
We prepared Adriamycin-resistant cancer cells by exposing an ovarian serous cystadenocarcinoma cell line to the drug. The resistant cells also showed cross-resistance to a wide variety of other compounds, including vincristine, vinblastine, actinomycin D, daunorubicin, mitomycin C and carboquone. Against vincristine, the cells showed a greater than 5,000-fold increase in resistance, far surpassing their resistance to the selection drug. The resistant cells displayed a decrease in intracellular Adriamycin content and an increase in the mRNA of the mdr-1 gene coding for P-glycoprotein, with no amplification of the DNA. In revertant cells, resistance to Adriamycin was lost, but that to mitomycin C was maintained. Adriamycin resistance was partially overcome by the addition of verapamil or cyclosporin A, but cross-resistance to mitomycin C was not influenced at all. These results strongly suggest that the resistance to mitomycin C observed in our Adriamycin-resistant cells was due to some other mechanism than that causing multidrug resistance.Entities:
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Year: 1990 PMID: 1976451 DOI: 10.1007/bf02897288
Source DB: PubMed Journal: Cancer Chemother Pharmacol ISSN: 0344-5704 Impact factor: 3.333