The multifactorial nature of chemotherapy failure in controlling cancer is often associated with the occurrence of multidrug resistance (MDR), a phenomenon likely related to the increased expression of members of the ATP binding cassette (ABC) transporter superfamily. In this respect, the most extensively characterized MDR transporters include ABCB1 (also known as MDR1 or P-glycoprotein) and ABCC1 (also known as MRP1) whose inhibition remains a priority to circumvent drug resistance. Herein, we report how the simple galloyl benzamide scaffold can be easily and properly decorated for the preparation of either MRP1 or P-gp selective inhibitors. In particular, some gallamides and pyrogallol-1-monomethyl ethers congeners showed remarkable affinity and selectivity toward MRP1 (e.g. 15g: IC50 = 9.50 μM, > 100 μM). On the other hand, trimethyl ether galloyl anilides, with few exceptions, exhibited moderate to very high and selective P-gp inhibition (e.g., 11g: IC50 = 0.2 μM, > 100μM).
Potent galloyl-based selective modulators targeting multidrug resistance associated protein 1 and P-glycoprotein.
STEFANACHI, ANGELA;NISO, MAURO;CAROTTI, Angelo;LEONETTI, Francesco;NICOLOTTI, ORAZIO;PERRONE, Roberto;BERARDI, Francesco;CELLAMARE, Saverio;COLABUFO, Nicola Antonio
2012-01-01
Abstract
The multifactorial nature of chemotherapy failure in controlling cancer is often associated with the occurrence of multidrug resistance (MDR), a phenomenon likely related to the increased expression of members of the ATP binding cassette (ABC) transporter superfamily. In this respect, the most extensively characterized MDR transporters include ABCB1 (also known as MDR1 or P-glycoprotein) and ABCC1 (also known as MRP1) whose inhibition remains a priority to circumvent drug resistance. Herein, we report how the simple galloyl benzamide scaffold can be easily and properly decorated for the preparation of either MRP1 or P-gp selective inhibitors. In particular, some gallamides and pyrogallol-1-monomethyl ethers congeners showed remarkable affinity and selectivity toward MRP1 (e.g. 15g: IC50 = 9.50 μM, > 100 μM). On the other hand, trimethyl ether galloyl anilides, with few exceptions, exhibited moderate to very high and selective P-gp inhibition (e.g., 11g: IC50 = 0.2 μM, > 100μM).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.