title: Chemopreventive efficacy of selenium against N-nitrosodiethylamine-induced hepatoma in albino rats.
abstract: The chemopreventive/chemotherapeutic effect of sodium selenite on tricarboxylic acid cycle key enzymes was investigated against hepatoma induced by environmental carcinogen N-nitrosodiethylamine. Decreased activities of TCA cycle key enzymes such as isocitrate dehydrogenase (ICDH), succinate dehydrogenase (SDH), malate dehydrogenase (MDH) and alpha-ketoglutarate dehydrogenase (alpha-KGDH) in hepatoma and surrounding tissues of hepatoma-bearing rats were observed. Upon selenium supplementation the above biochemical changes were reverted in a dose- and duration-dependent manner. This study further confirms the chemopreventive/chemotherapeutic effect of sodium selenite which is found to be more effective in the initiation phase of carcinogenesis.
authors.affiliation: Department of Medical Biochemistry, Dr ALM Post-Graduate Institute of Basic Medical Sciences, University of Madras, India.
authors.forename: C
authors.initials: C
authors.lastname: Thirunavukkarasu
authors.forename: J P
authors.initials: JP
authors.lastname: Singh
authors.forename: K
authors.initials: K
authors.lastname: Selvendiran
authors.forename: D
authors.initials: D
authors.lastname: Sakthisekaran
mesh_terms: D000477:Alkylating Agents / Q000633:toxicity; D000818:Animals; D016588:Anticarcinogenic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D002952:Citric Acid Cycle; D019587:Dietary Supplements; D004052:Diethylnitrosamine / Q000633:toxicity*; D006801:Humans; D007521:Isocitrate Dehydrogenase / Q000378:metabolism; D007655:Ketoglutarate Dehydrogenase Complex / Q000378:metabolism; D007668:Kidney / Q000187:drug effects / Q000201:enzymology; D008114:Liver Neoplasms, Experimental / Q000139:chemically induced / Q000188:drug therapy / Q000201:enzymology / Q000517:prevention & control*; D008291:Malate Dehydrogenase / Q000378:metabolism; D008297:Male; D008928:Mitochondria / Q000201:enzymology; D008930:Mitochondria, Liver / Q000187:drug effects / Q000201:enzymology; D051381:Rats; D017208:Rats, Wistar; D012643:Selenium / Q000008:administration & dosage / Q000378:metabolism*; D018038:Sodium Selenite / Q000008:administration & dosage / Q000627:therapeutic use*; D013385:Succinate Dehydrogenase / Q000378:metabolism
chemical_list: D000477:Alkylating Agents; D016588:Anticarcinogenic Agents; D004052:Diethylnitrosamine; D008291:Malate Dehydrogenase; D007521:Isocitrate Dehydrogenase; D007655:Ketoglutarate Dehydrogenase Complex; D013385:Succinate Dehydrogenase; D012643:Selenium; D018038:Sodium Selenite