3'3-ditrifluoromethyldiphenyl diselenide: a new organoselenium compound with interesting antigenotoxic and antimutagenic activities.
The trace element selenium (Se), once known only for its potential toxicity, is now a well-established essential micronutrient for mammals. The organoselenium compound diphenyl diselenide (DPDS) has shown interesting antioxidant and neuroprotective activities. On the other hand, this compound has also presented pro-oxidant and mutagenic effects. The compound 3'3-ditrifluoromethyldiphenyl diselenide (DFDD), a structural analog of diphenyl diselenide, has proven antipsychotic activity in mice. Nevertheless, as opposed to DPDS, little is known on the biological and toxicological properties of DFDD. In the present study, we report the genotoxic effects of the organoselenium compound DFDD on Salmonella typhimurium, Saccharomyces cerevisiae and Chinese hamster lung fibroblasts (V79 cells). DFDD protective effects against hydrogen peroxide (H(2)O(2))-induced DNA damage in vitro are demonstrated. DFDD did not cause mutagenic effects on S. typhimurium or S. cerevisiae strains; however, it induced DNA damage in V79 cells at doses higher than 25 microM, as detected by comet assay. DFDD protected S. typhimurium and S. cerevisiae against H(2)O(2)-induced mutagenicity, and, at doses lower than 12.5 microM, prevented H(2)O(2)-induced genotoxicity in V79 cells. The in vitro assays demonstrated that DFDD mimics catalase activity better than DPDS, but neither presents superoxide dismutase action. The products of the reactions of DFDD or DPDS with H(2)O(2) were different, as determined by electrospray mass spectrometry analysis (ESI-MS). These results suggest that DFDD is not mutagenic for bacteria or yeast; however, it may induce weak genotoxic effects on mammalian cells. In addition, DFDD has a protective effect against H(2)O(2)-induced damage probably by mimicking catalase activity, and the distinct products of the reaction DFDD with H(2)O(2) probably have a fundamental role in the protective effects of DFDD.
Departamento de Biofísica/Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Miriana da Silva
Mda S
Machado
Izabel Vianna
IV
Villela
Dinara Jaqueline
DJ
Moura
Renato Moreira
RM
Rosa
Mirian
M
Salvador
Norberto P
NP
Lopes
Antonio Luiz
AL
Braga
Rafael
R
Roesler
Jenifer
J
Saffi
João Antonio P
JA
Henriques
D000818:Animals; D016587:Antimutagenic Agents / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D002478:Cells, Cultured; D006224:Cricetinae; D003412:Cricetulus; D019610:Cytoprotection / Q000187:drug effects; D004249:DNA Damage / Q000187:drug effects*; D004353:Drug Evaluation, Preclinical; D008954:Models, Biological; D009152:Mutagenicity Tests; D016566:Organoselenium Compounds / Q000494:pharmacology*; D012441:Saccharomyces cerevisiae / Q000187:drug effects; D012486:Salmonella typhimurium / Q000187:drug effects; D013234:Stem Cells / Q000187:drug effects; D013482:Superoxide Dismutase / Q000378:metabolism; D000072105:Superoxide Dismutase-1
C517388:3',3-ditrifluoromethyldiphenyl diselenide; D016587:Antimutagenic Agents; D016566:Organoselenium Compounds; D002374:Catalase; C000606291:Sod1 protein, mouse; D013482:Superoxide Dismutase; D000072105:Superoxide Dismutase-1