title: {(1R,2R,4R)-4-methyl-1,2-cyclohexanediamine}oxalatoplatinum(II): a novel enantiomerically pure oxaliplatin derivative showing improved anticancer activity in vivo.
abstract: Novel derivatives of the clinically established anticancer drug oxaliplatin were synthesized. Cytotoxicity of the compounds was studied in six human cancer cell lines by means of the MTT assay. Additionally, most promising complexes were also investigated in cisplatin- and oxaliplatin-resistant human cancer cell models. The therapeutic efficacy in vivo was studied in the murine L1210 leukemia model. Most remarkably, {(1R,2R,4R)-4-methyl-1,2-cyclohexanediamine}oxalatoplatinum(II), comprising an equatorial methyl substituent at position 4 of the cyclohexane ring, was as potent as oxaliplatin in vitro but distinctly more effective in the L1210 model in vivo at the optimal dose. The advantage observed in the in vivo situation was mainly based on a more favorable therapeutic index. The maximum tolerated dose of the novel analogue was higher than that of oxaliplatin and caused a greater increase in life span (>200% versus 152%), with more animals experiencing long-term survival (5/6 versus 2/6). These data support further (pre)clinical development of the methyl-substituted oxaliplatin analogue with improved anticancer activity.
authors.affiliation: University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42, A-1090 Vienna, Austria.
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Abramkin
authors.forename: Ute
authors.initials: U
authors.lastname: Jungwirth
authors.forename: Seied M
authors.initials: SM
authors.lastname: Valiahdi
authors.forename: Claudia
authors.initials: C
authors.lastname: Dworak
authors.forename: Ladislav
authors.initials: L
authors.lastname: Habala
authors.forename: Kristof
authors.initials: K
authors.lastname: Meelich
authors.forename: Walter
authors.initials: W
authors.lastname: Berger
authors.forename: Michael A
authors.initials: MA
authors.lastname: Jakupec
authors.forename: Christian G
authors.initials: CG
authors.lastname: Hartinger
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Nazarov
authors.forename: Mathea Sophia
authors.initials: MS
authors.lastname: Galanski
authors.forename: Bernhard K
authors.initials: BK
authors.lastname: Keppler
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D045744:Cell Line, Tumor; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007939:Leukemia L1210 / Q000188:drug therapy / Q000473:pathology; D051379:Mice; D008811:Mice, Inbred DBA; D009368:Neoplasm Transplantation; D009944:Organoplatinum Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000077150:Oxaliplatin; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: C553263:(4-methyl-1,2-cyclohexanediamine)oxalatoplatinum(II); D000970:Antineoplastic Agents; D056831:Coordination Complexes; D009944:Organoplatinum Compounds; D000077150:Oxaliplatin