title: Synthesis of novel water-soluble 7-(aminoacylhydrazono)-formyl camptothecins with potent inhibition of DNA topoisomerase I.
abstract: Eighteen new water-soluble 7-(aminoacylhydrazono)-formyl camptothecins were synthesized and evaluated for their ability to cause protein-linked DNA breaks and to inhibit topoisomerase I activity. Compared with camptothecin, five of the compounds were as potent or more potent in these tw assays but were less toxic in several cancer cell lines. The results suggest that the 7 position in the B ring is a suitable location for introducing a polar moiety into camptothecin producing analogues with enhanced topoisomerase I inhibiting activity.
authors.affiliation: Natural Products Laboratory, School of Pharmacy, University of North Carolina at Chapel Hill 27599-7360, USA.
authors.forename: H K
authors.initials: HK
authors.lastname: Wang
authors.forename: S Y
authors.initials: SY
authors.lastname: Liu
authors.forename: K M
authors.initials: KM
authors.lastname: Hwang
authors.forename: G
authors.initials: G
authors.lastname: Taylor
authors.forename: K H
authors.initials: KH
authors.lastname: Lee
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002166:Camptothecin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D004249:DNA Damage; D004791:Enzyme Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D007624:KB Cells; D013058:Mass Spectrometry; D015394:Molecular Structure; D012995:Solubility; D013055:Spectrophotometry, Infrared; D059004:Topoisomerase I Inhibitors
chemical_list: D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; D059004:Topoisomerase I Inhibitors; D002166:Camptothecin