title: Inhibitory effect of dibenzoylmethane on mutagenicity of food-derived heterocyclic amine mutagens.
abstract: Dibenzoylmethane (DBM), a structural analogue of curcumin (a bioactive phytochemical present in a widely used spice turmeric) was screened for its inhibitory effect against seven cooked food mutagens (heterocyclic amines): 2-amino-3-methylimidazo[4,5-f]quinoline (IQ), 2-amino-3,4-dimethylimidazo[4,5-f]quinoline (MeIQ), 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1), 3-amino-1-methyl-5H-pyrido[4,3-b]indole (Trp-P-2), 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) and 2-amino-6-methyldipyrido[1,2-a:3',2'-d]imidazole (Glu-P-1), in both TA98 and TA100 strains of Salmonella typhimurium using Ames Salmonella/reversion assay in the presence of Aroclor1254-induced rat liver S9 homogenate. DBM has been reported to antagonize the mutagenicity of several chemical carcinogens in vitro and has recently been shown to be even more effective than curcumin in suppressing the 7,12-dimethylbenz[a]anthracene (DMBA)-induced mammary tumors in rats. But there are no reports regarding its antimutagenic properties against cooked food mutagens. Results of the present investigations clearly indicate that dibenzoylmethane is a very potent antimutagenic agent, that could effectively inhibit mutagenicity induced by all the tested cooked food mutagens in both the frame shift (TA98) as well as the base pair mutation sensitive (TA100) strains of S. typhimurium. These highly potent inhibitory effects of dibenzoylmethane against heterocyclic amines observed in our preliminary investigations strongly warrant further studies of its efficacy as a cancer chemopreventive agent.
mesh_terms: D000588:Amines / Q000037:antagonists & inhibitors / Q000633:toxicity*; D000818:Animals; D016587:Antimutagenic Agents / Q000494:pharmacology*; D001565:Benzoates / Q000494:pharmacology*; D047188:Chalcones; D005502:Food; D006801:Humans; D008297:Male; D009152:Mutagenicity Tests; D008517:Phytotherapy; D051381:Rats; D017207:Rats, Sprague-Dawley; D012486:Salmonella typhimurium / Q000145:classification / Q000235:genetics
chemical_list: D000588:Amines; D016587:Antimutagenic Agents; D001565:Benzoates; D047188:Chalcones; C061481:dibenzoylmethane