Structure-activity relationship and molecular mechanisms of ethyl 2-amino-6-(3,5-dimethoxyphenyl)-4-(2-ethoxy-2-oxoethyl)-4H-chromene-3-carboxylate (CXL017) and its analogues.

Abstract:

:Multidrug resistance (MDR) in cancer is a phenomenon in which administration of a single chemotherapeutic agent causes cross-resistance of cancer cells to a variety of therapies even with different mechanisms of action. Development of MDR against standard therapies is a major challenge in the treatment of cancer. Previously we have demonstrated a unique ability of CXL017 (5) to selectively target MDR cancer cells and synergize with mitoxantrone (MX) in HL60/MX2 MDR cells. Here we expand its scope and demonstrate that 5 can synergize with both vincristine and paclitaxel in three different MDR cell lines (HL60/DNR, K562/HHT300, and CCRF-CEM/VLB100). We also demonstrate that 5 has potent cytotoxicity in the NCI-60 panel of cell lines with an average IC(50) of 1.04 μM. In addition, 5 has a unique mechanism of action in comparison with standard agents in the NCI database based on COMPARE analysis. Further structure-activity relationship study led to the development of a more potent analogue, compound 7d, with an IC(50) of 640 nM in HL60/MX2. Additionally, one enantiomer of 5 is 13-fold more active than the less active enantiomer. Taken together, our study has led to the discovery of a series of analogues that selectively target drug-resistant cancer cells with the potential for the treatment of drug-resistant cancers.

journal_name

J Med Chem

authors

Das SG,Srinivasan B,Hermanson DL,Bleeker NP,Doshi JM,Tang R,Beck WT,Xing C

doi

10.1021/jm200764t

subject

Has Abstract

pub_date

2011-08-25 00:00:00

pages

5937-48

issue

16

eissn

0022-2623

issn

1520-4804

journal_volume

54

pub_type

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