Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 58, Issue 7, Pages 3188-3208Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.5b00136
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Funding
- National Institutes of Health (NIH) [U01CA089566, P30CA023168]
- Purdue Research Foundation Grant
- NIH, National Cancer Institute, Center for Cancer Research [Z01-BC006161]
- National Cancer Institute, National Institutes of Health [HHSN261200800001E]
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The structureactivity relationships and hit-to-lead optimization of dual Top1-TDP1 inhibitors in the indenoisoquinoline drug class were investigated. A series of nitrated 7-, 8-, 9-, and 10-hydroxyindenoisoquinolines were synthesized and evaluated. Several compounds displayed potent dual Top1-TDP1 inhibition. The 9-hydroxy series exhibited potencies and cytotoxicities vs Top1 that surpassed those of camptothecin (CPT), the natural alkaloid that is being used as a standard in the Top1-mediated DNA cleavage assay. One member of this series was a more potent Top1 inhibitor at a concentration of 5 nM and produced a more stable ternary drugDNATop1 cleavage complex than CPT.
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