title: Synthesis and antitumor activity of novel 10-substituted camptothecin analogues.
abstract: In an attempt to improve the antitumor activity and decrease the cytotoxicity of camptothecin, 18 new 10-substituted camptothecin derivatives were prepared. The cytotoxicity in vitro on cancer cell lines and antitumor activity in vivo, and inhibitory properties of topoisomerase I of these derivatives were evaluated. Most of these derivatives possessed lower cytotoxicities than CPT, and the compounds 13, 21, 22, 23, and 24 showed similar topoisomerase I inhibitory activity to CPT. Analogues 13 exhibited the best antitumor activity in vivo among all derivatives we prepared.
authors.affiliation: Key Laboratory of Forest Plant Ecology, Northeast Forestry University, Ministry of Education, Harbin 150040, China.
authors.forename: Qingyong
authors.initials: Q
authors.lastname: Li
authors.forename: Yuangang
authors.initials: Y
authors.lastname: Zu
authors.forename: Rongzhen
authors.initials: R
authors.lastname: Shi
authors.forename: Liping
authors.initials: L
authors.lastname: Yao
authors.forename: Yujie
authors.initials: Y
authors.lastname: Fu
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Yang
authors.forename: Lei
authors.initials: L
authors.lastname: Li
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000138:chemical synthesis* / Q000494:pharmacology*; D002166:Camptothecin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D045744:Cell Line, Tumor; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008807:Mice, Inbred BALB C; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D002166:Camptothecin