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Cancer remains an aggressive deadly disease, if drug resistance develops. This problem is aggravated by the fact that multiple rather than single mechanisms are involved in resistance and that multidrug resistance (MDR) phenomena cause inefficacy of many clinical established anticancer drugs. We are seeking for novel cytotoxic phytochemicals to combat drug-resistant tumour cells. In the present...
The expression of diverse resistance mechanisms in cancer cells is one of the major barriers to successful cancer chemotherapy. In the present study, we assessed the cytotoxicity of two naturally occurring flavonoids dorsmanin F (1, a flavanone) and poinsettifolin B (2, a chalcone) against 9 drug-sensitive and multidrug-resistant (MDR) cancer cell lines. The resazurin reduction assay was used to...
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