title: Modulation of MRP-1-mediated multidrug resistance by indomethacin analogues.
abstract: Multidrug resistance (MDR) is a major limiting factor in the development and application of drug candidates. MDR caused by MRP-1 is known to be modulated by the nonsteroidal antiinflammatory drug indomethacin. We have synthesized and biologically evaluated a library of indomethacin analogues. The indomethacin-derived compound library was synthesized employing the Fischer-indole synthesis as the key transformation and making use of a "resin-capture-release" strategy. Sixty representative members of the library were evaluated in a cell biological cytotoxicity assay employing the MRP-1 expressing human glioblastoma cell line T98G as a model system. Nine of the 60 tested derivatives increased the doxorubicin-mediated cytotoxicity at a comparable or higher level than indomethacin itself. Analysis of these derivatives revealed an interesting structure-function relationship. Most remarkably, two substances increased the toxicity, when doxorubicin was used at clinically relevant low concentrations, at a higher degree than indomethacin.
authors.affiliation: Abteilung Chemische Biologie, Max-Planck-Institut für Molekulare Physiologie, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany.
authors.forename: Claudia
authors.initials: C
authors.lastname: Rosenbaum
authors.forename: Sonja
authors.initials: S
authors.lastname: Röhrs
authors.forename: Oliver
authors.initials: O
authors.lastname: Müller
authors.forename: Herbert
authors.initials: H
authors.lastname: Waldmann
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D045744:Cell Line, Tumor; D020650:Combinatorial Chemistry Techniques; D004317:Doxorubicin / Q000494:pharmacology; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D004357:Drug Synergism; D006801:Humans; D007213:Indomethacin / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013329:Structure-Activity Relationship
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D004317:Doxorubicin; D007213:Indomethacin; D027425:ATP-Binding Cassette, Sub-Family C Proteins; C421109:multidrug resistance-associated protein 1