Leishmania amazonensis: multidrug resistance in vinblastine-resistant promastigotes is associated with rhodamine 123 efflux, DNA amplification, and RNA overexpression of a Leishmania mdr1 gene.


A vinblastine-resistant Leishmania amazonensis cell line (RV100) which exhibits cross-resistance to the unrelated drug adriamycin, and thus is considered to be multidrug resistant (MDR), was isolated after stepwise selection with increasing concentrations of vinblastine. This phenotype was partially reverted by the calcium channel antagonist verapamil. Drug… (More)


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