In vitro anticancer activity and evaluation of DNA duplex binding affinity of phenyl-substituted indoloquinolines
2011
Riechert-Krause, Fanny | Eick, Andrea | Grünert, Renate | Bednarski, Patrick J. | Weisz, Klaus
Phenyl-substituted indoloquinolines were studied for their biological activity and their DNA binding affinity. Water-soluble aminoalkyl derivatives were prepared and have shown significant in vitro anticancer activity. Unlike previous reports on the potential role of duplex DNA as target for various indoloquinoline based drugs, duplex UV melting experiments and fluorescence titrations suggest only weak and moderately strong binding of the phenyl-substituted indoloquinolines at 120mM and 20mM Na⁺ concentrations, respectively. Binding is suggested by ethidium displacement and circular dichroism experiments to be associated with drug intercalation between base pairs.
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