Progesterone–adenine hybrids as bivalent inhibitors of P-glycoprotein-mediated multidrug efflux: Design, synthesis, characterization and biological evaluation
2012
Zeinyeh, Waël | Mahiout, Zahia | Radix, Sylvie | Lomberget, Thierry | Dumoulin, Axel | Barret, Roland | Grenot, Catherine | Rocheblave, Luc | Matera, Eva-Laure | Dumontet, Charles | Walchshofer, Nadia
Bivalent ligands were designed on the basis of the described close proximity of the ATP-site and the putative steroid-binding site of P-glycoprotein (ABCB1). The syntheses of 19 progesterone–adenine hybrids are described. Their abilities to inhibit P-glycoprotein-mediated daunorubicin efflux in K562/R7 human leukemic cells overexpressing P-glycoprotein were evaluated versus progesterone. The hybrid with a hexamethylene linker chain showed the best inhibitory potency. The efficiency of these progesterone-adenine hybrids depends on two main factors: (i) the nature of the linker and (ii) its attachment point on the steroid skeleton.
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