Abstract
The sensitivity to clofazimine, B669 and eight standard anti-tumour chemotherapeutic agents of four intrinsically multidrug resistant (MDR) cell lines [three human hepatocellular carcinoma cell lines (HepG2, PLC and Mahlavu) and a human colorectal carcinoma cell line (CaCo2)] were compared with that of a human cervix epithelioid carcinoma cell line (HeLa). The MDR cell lines and HeLa cells showed equivalent sensitivity to the riminophenazines, methotrexate and 5-fluorouracil, but exhibited ranging levels of resistance to vinblastine, doxorubicin, mitomycin C, daunorubicin, etoposide and vincristine. Riminophenazines may be useful agents in the chemotherapy of tumours with intrinsic MDR.
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