title: Cytotoxic activity, X-ray crystal structures and spectroscopic characterization of cobalt(II), copper(II) and zinc(II) coordination compounds with 2-substituted benzimidazoles.
abstract: Herein we present the synthesis, structural and spectroscopic characterization of coordination compounds of cobalt(II), copper(II) and zinc(II) with 2-methylbenzimidazole (2mbz), 2-phenylbenzimidazole (2phbz), 2-chlorobenzimidazole (2cbz), 2-benzimidazolecarbamate (2cmbz) and 2-guanidinobenzimidazole (2gbz). Their cytotoxic activity was evaluated using human cancer cell lines, PC3 (prostate), MCF-7 (breast), HCT-15 (colon), HeLa (cervic-uterine), SKLU-1 (lung) and U373 (glioblastoma), showing that the zinc(II) and copper(II) compounds [Zn(2mbz)(2)Cl(2)].0.5H(2)O, [Zn(2cmbz)(2)Cl(2)].EtOH, [Cu(2cmbz)Br(2)].0.7H(2)O and [Cu(2gbz)Br(2)] had significant cytotoxic activity. The isostructural cobalt(II) complexes showed not significant activity. The cytotoxic activity is related to the presence of halides in the coordination sphere of the metal ion. Recuperation experiments with HeLa cells, showed that the cells recuperated after removing the copper(II) compounds and, on the contrary, the cells treated with the zinc(II) compounds did not. These results indicate that the mode of action of the coordination compounds is different.
authors.affiliation: Departamento de Química Inorgánica, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, D.F. México, Mexico.
authors.forename: Obdulia
authors.initials: O
authors.lastname: Sánchez-Guadarrama
authors.forename: Horacio
authors.initials: H
authors.lastname: López-Sandoval
authors.forename: Francisco
authors.initials: F
authors.lastname: Sánchez-Bartéz
authors.forename: Isabel
authors.initials: I
authors.lastname: Gracia-Mora
authors.forename: Herbert
authors.initials: H
authors.lastname: Höpfl
authors.forename: Noráh
authors.initials: N
authors.lastname: Barba-Behrens
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D001562:Benzimidazoles / Q000737:chemistry* / Q000494:pharmacology; D045744:Cell Line, Tumor; D002470:Cell Survival; D002614:Chelating Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D015195:Drug Design; D004354:Drug Screening Assays, Antitumor; D006131:Growth Inhibitors / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D006367:HeLa Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D013053:Spectrophotometry; D019265:Spectroscopy, Near-Infrared; D013329:Structure-Activity Relationship; D015032:Zinc / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D001562:Benzimidazoles; D002614:Chelating Agents; D006131:Growth Inhibitors; D008024:Ligands; D009942:Organometallic Compounds; D003035:Cobalt; D003300:Copper; D015032:Zinc