title: Protective effects of a mixture of dietary agents against 7,12-dimethylbenz[a]anthracene-induced genotoxicity and oxidative stress in mice.
abstract: We investigated the effects of pretreatment with tomato, garlic, and turmeric, alone and in combination, against 7,12-dimethylbenz[a]anthracene (DMBA)-induced genetic damage and oxidative stress in male Swiss mice. Measurement of the incidence of bone marrow micronuclei as well as the extent of lipid peroxidation and the status of the antioxidants reduced glutathione, glutathione peroxidase, and glutathione-S-transferase in the liver and erythrocytes were used as biomarkers of chemoprotection. In DMBA-treated animals, increased frequency of bone marrow micronuclei was accompanied by enhanced lipid peroxidation and antioxidant depletion. Pretreatment with tomato, garlic, and turmeric alone and a combination of these agents significantly reduced the frequencies of DMBA-induced bone marrow micronuclei as well as the extent of lipid peroxidation. These changes may be mediated by the antioxidant-enhancing effects of the dietary agents. The results of the present study suggest that a diet containing even low levels of different naturally occurring compounds is effective in exerting antigenotoxic effects by inhibiting DMBA-induced oxidative stress.
authors.affiliation: Department of Biochemistry, Faculty of Science, Annamalai University, Annamalainagar, Tamil Nadu, India.
authors.forename: K V P
authors.initials: KV
authors.lastname: Chandra Mohan
authors.forename: S K
authors.initials: SK
authors.lastname: Abraham
authors.forename: S
authors.initials: S
authors.lastname: Nagini
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000633:toxicity; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002273:Carcinogens / Q000633:toxicity; D030024:Curcuma; D004249:DNA Damage / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D004912:Erythrocytes / Q000201:enzymology; D005737:Garlic / Q000737:chemistry; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects*; D008099:Liver / Q000201:enzymology; D018551:Solanum lycopersicum / Q000737:chemistry; D008297:Male; D051379:Mice; D018384:Oxidative Stress / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology*; D011897:Random Allocation
chemical_list: D000975:Antioxidants; D002273:Carcinogens; D010936:Plant Extracts; D015127:9,10-Dimethyl-1,2-benzanthracene; C012596:turmeric extract; D005979:Glutathione Peroxidase; D005982:Glutathione Transferase; D005978:Glutathione