title: Antitumor AHMA linked to DNA minor groove binding agents: synthesis and biological evaluation.
abstract: DNA minor groove binder hybrid molecules, netropsin derivatives such as N-[2-(dimethylamino)ethyl]-1-methyl-4-aminopyrrolo-2-carboxamide (MePy) or its derivatives containing two units of N-methylpyrrolecarboxamide (diMePy) and bisbenzimidazole (Ho33258), were linked to the NH(2) function of AHMA or to the CH(2)OH group of AHMA-ethylcarbamate to form AHMA-N-netropsins (13-16) and AHMA-ethylcarbamate-O-netropsins (19-22), and AHMA-bisbenzimidazole (AHMA-Ho33258, 25), respectively. These conjugates' in vitro antitumor activity, inhibition of a variety of human tumor cell growth, revealed that AHMA-ethylcarbamate-O-netropsin derivatives were more cytotoxic than AHMA-N-netropsin compounds. In the same studies, all compounds bearing MePy were more potent than those compounds linked with diMePy. Moreover, AHMA-netropsin derivatives bearing a succinyl chain as the linking spacer were more potent than those compounds having a glutaryl bridge. Among these hybrid molecules, AHMA-ethylcarbamate-O-succinyl-MePy (19) was 2- to 6-fold more cytotoxic than the parent compound AHMA (5) in various cell lines, whereas compound 25 had very poor solubility and was inactive. Studies on the inhibitory effect against topoisomerase II (Topo II) and DNA interaction of these conjugates showed no correlation between the potency of DNA binding and inhibitory activity against Topo II.
authors.affiliation: Laboratory of Bioorganic Chemistry, Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan.
authors.forename: Kamesh
authors.initials: K
authors.lastname: Rastogi
authors.forename: Jang-Yang
authors.initials: JY
authors.lastname: Chang
authors.forename: Wen-Yu
authors.initials: WY
authors.lastname: Pan
authors.forename: Ching-Huang
authors.initials: CH
authors.lastname: Chen
authors.forename: Ting-Chao
authors.initials: TC
authors.lastname: Chou
authors.forename: Li-Tzong
authors.initials: LT
authors.lastname: Chen
authors.forename: Tsann-Long
authors.initials: TL
authors.lastname: Su
mesh_terms: D000166:Acridines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000814:Aniline Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002219:Carbamates / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D004247:DNA / Q000737:chemistry / Q000378:metabolism*; D004278:DNA, Superhelical / Q000737:chemistry; D004354:Drug Screening Assays, Antitumor; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D009429:Netropsin / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D059005:Topoisomerase II Inhibitors; D014407:Tumor Cells, Cultured
chemical_list: C466640:3-(9-acridinylamino)-5-hydroxymethylaniline; C401318:3-(9-acridinylamino)-5-hydroxymethylaniline ethylcarbamate; D000166:Acridines; D000814:Aniline Compounds; D000970:Antineoplastic Agents; D002219:Carbamates; D004278:DNA, Superhelical; D004791:Enzyme Inhibitors; D059005:Topoisomerase II Inhibitors; D009429:Netropsin; D004247:DNA