This study investigated the effect of naturally occurring flavonoids and synthetic aurone derivatives on the formation of cardiotoxic doxorubicinol and transport of doxorubicin in breast cancer cells. Quercetin significantly inhibited the formation of doxorubicinol. Quercetin and aurones did not significantly affect transport of [14C]doxorubicin in human resistant breast cancer cells. In conclusion, quercetin should be further tested for its potency to decrease doxorubicin-mediated toxicity.
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