Abstract

Background: The blood-brain barrier (BBB) is a major hurdle to successful pharmacotherapy of brain tumors. ABCB1 and ABCG2 are efflux transporters that are expressed in brain tumor vessels and reduce the uptake of many small molecule drugs. Elacridar and tariquidar are both dual ABCB1 and ABCG2 inhibitors. We aim to improve pharmacotherapy of brain cancer by concomitant use of potentially effective drugs with elacridar. Since tariquidar has mostly been used to assess the effects of ABC-transporters on brain uptake in human studies with PET tracers, we decided to compare both agents in our rodent models.

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