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MedKoo CAT#: 201065
CAS#: 129716-58-1 (free base)
Description: Dofequidar, also known as MS-209, is a quinolone-derived sphingomyelin synthase inhibitor that blocks P-glycoprotein and multidrug resistance-associated protein-1, is under development by Schering for the potential treatment of multidrug resistant tumors. Dofequidar was found to sensitizes cancer stem-like side population cells to chemotherapeutic drugs by inhibiting ABCG2/BCRP-mediated drug export.
MedKoo Cat#: 201065
Name: Dofequidar
CAS#: 129716-58-1 (free base)
Chemical Formula: C30H31N3O3
Exact Mass: 481.23654
Molecular Weight: 481.59
Elemental Analysis: C, 74.82; H, 6.49; N, 8.73; O, 9.97
Related CAS #: 129716-58-1 (free base); 153653-30-6 (furamate salt);
Synonym: MS-209; MS 209; MS209; Dofequidar
IUPAC/Chemical Name: 1-(4-(2-hydroxy-3-(quinolin-5-yloxy)propyl)piperazin-1-yl)-2,2-diphenylethanone
InChi Key: KLWUUPVJTLHYIM-UHFFFAOYSA-N
InChi Code: InChI=1S/C30H31N3O3/c34-25(22-36-28-15-7-14-27-26(28)13-8-16-31-27)21-32-17-19-33(20-18-32)30(35)29(23-9-3-1-4-10-23)24-11-5-2-6-12-24/h1-16,25,29,34H,17-22H2
SMILES Code: OC(COC1=C2C=CC=NC2=CC=C1)CN3CCN(C(C(C4=CC=CC=C4)C5=CC=CC=C5)=O)CC3
A substance that is being studied for its ability to make cancer cells respond better to chemotherapy drugs to which they have become resistant. It belongs to the family of drugs called quinolone antibiotics. A synthetic quinoline derivative with multidrug resistance (MDR) modulating properties. Dofequidar fumarate, like many other MDR reversal agents, binds competitively to the drug-binding site of the transmembrane P-glycoprotein efflux pump (P-gp). Once bound to the P-gp efflux pump, dofequidar is transported out of transformed cells by a mechanism similar to that used by cytotoxic drugs, thereby blocking the efflux of these compounds from the cell. Inhibition of the efflux pump by this agent leads to a retention of the cytotoxic drug resulting in increased intracellular drug concentrations, thereby enhancing cytotoxicity. Dofequidar has demonstrated reversal of the MDR phenotype in those cells exposed to various chemotherapeutic agents, such as vinca alkaloids and anthracyclines.
1. Katayama R, Koike S, Sato S, Sugimoto Y, Tsuruo T, Fujita N. Dofequidar fumarate sensitizes cancer stem-like side population cells to chemotherapeutic drugs by inhibiting ABCG2/BCRP-mediated drug export. Cancer Sci. 2009 Nov;100(11):2060-8. doi: 10.1111/j.1349-7006.2009.01288.x. Epub 2009 Jul 17. PubMed PMID: 19673889.
