alexa The beta-carboline alkaloid harmine inhibits BCRP and can reverse resistance to the anticancer drugs mitoxantrone and camptothecin in breast cancer cells.
Oncology

Oncology

Chemotherapy: Open Access

Author(s): Ma Y, Wink M, Ma Y, Wink M, Ma Y, Wink M, Ma Y, Wink M

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Abstract Multidrug resistance (MDR), mediated by highly expressed ABC transporters, is one of the most important mechanisms in tumor cells. Breast cancer resistance protein (BCRP) is a member of the ABC transporter family. This transporter expels different kinds of lipophilic anticancer drugs, which have diffused into the cells. In this study, 96-well plate based assays and flow cytometry analysis were employed to screen natural products for BCRP inhibition. The beta-carboline alkaloid harmine inhibited BCRP in a BCRP overexpressing breast cancer cell line (MDA-MB-231). Harmine reduced resistance to the anticancer drugs mitoxantrone and camptothecin mediated by BCRP and might be an interesting new reversal agent. Harmine did not inhibit P-glycoprotein (P-gp) mediated drug efflux. (c) 2009 John Wiley & Sons, Ltd. This article was published in Phytother Res and referenced in Chemotherapy: Open Access

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