title: Anticarcinogenic effects of hexaamminecobalt(III) chloride in mice initiated with diethylnitrosamine.
abstract: Hexaamminecobalt(III) chloride ([Co(NH3)6]Cl3) was investigated for its antineoplastic role in relation to tumor marker enzymes, drug metabolizing enzymes, oxidative stress-related parameters, and histopathological analysis of liver and lung tissues of mice. Initiation was performed using a single intraperitoneal injection of diethylnitrosamine (DENA) at a carcinogenic dose of 90 mg/kg body weight. The cobalt complex supplementation at a dose of 100 ppm in drinking water was given ad libitum throughout the experimental period of 14 weeks. In comparison to lung, the cobalt complex supplementation was found to reverse DENA-induced biochemical changes more effectively in liver. Histological examination of liver and lung from DENA-initiated and cobalt-complex-supplemented mice showed considerable protection in the case of liver compared to that of lung. The involvement of the [Co(NH3)6]Cl3 in modulating several factors associated with carcinogenesis induced by DENA thus showed its anticarcinogenic potential against chemically induced hepatocarcinogenesis.
authors.affiliation: Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA. anaura@lsuhsc.edu
authors.forename: Amarjit S
authors.initials: AS
authors.lastname: Naura
authors.forename: Natwar R
authors.initials: NR
authors.lastname: Kalla
authors.forename: Raj P
authors.initials: RP
authors.lastname: Sharma
authors.forename: Rajeshwar
authors.initials: R
authors.lastname: Sharma
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D014408:Biomarkers, Tumor / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D003035:Cobalt / Q000494:pharmacology*; D004052:Diethylnitrosamine / Q000037:antagonists & inhibitors*; D005978:Glutathione / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008113:Liver Neoplasms / Q000139:chemically induced / Q000473:pathology; D008175:Lung Neoplasms / Q000139:chemically induced / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D013482:Superoxide Dismutase / Q000378:metabolism; D005723:gamma-Glutamyltransferase / Q000378:metabolism
chemical_list: D016588:Anticarcinogenic Agents; D014408:Biomarkers, Tumor; C030862:cobalt ammonium complex; D003035:Cobalt; D004052:Diethylnitrosamine; D007770:L-Lactate Dehydrogenase; D002374:Catalase; D013482:Superoxide Dismutase; D005723:gamma-Glutamyltransferase; D005982:Glutathione Transferase; D005978:Glutathione