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Oxidative Stress of Mouse Fed Irradiated Diet Containing High Unsaturated Fatty Acid  

Seo, Dae-Young (Department of Food and Nutrition, Chungnam National University)
Park, Sun-Young (Department of Food and Nutrition, Chungnam National University)
Kang, Myoung-Hee (Department of Food and Nutrition, Hannam University)
Suh, Kwang-Sun (Department of Pathology, Chungnam National University School of Medicine)
Ly, Sun-Yung (Department of Food and Nutrition, Chungnam National University)
Publication Information
Journal of Nutrition and Health / v.39, no.7, 2006 , pp. 599-609 More about this Journal
Abstract
In this study, we investigated the in vivo effect by intake of the irradiated foods such as mackerel and sesame seed which are high in unsaturated fatty acid through TBARS (thiobarbituric acid reactive subtance) and the tissue pathological and genotoxicological test. Thirty two ICR mice are divided into four groups, one non-irradiated (control) group and three irradiated (5, 10, 20 kGy, respectively) groups. Sesame seed and pulverized mackerel in modified AIN93M diet were mixed together then divided into four identical parts. Three parts of them were irradiated by doses of 5, 10, and 20 kGy. These experimental diet were fed to each group for 4, 8 and] 6 weeks. The results of the study were as follows: No significant differences in weight gain were found in each group. Peroxide value of the irradiated diet was higher than that of the non-radiated one and also increased according to the storage period. TBA values in plasma, liver, kidney and Peyer's patch were not significantly different among 4 groups. DNA% in tail, tail length (TL) and tail moment (TM) values of the blood lymphocyte in 4, 8 and 16 week groups and the liver in 16 week group were much measured over the control DNA % in tail of kidney of 8 week group was significantly than the control and TL and TM of 8 week and TM of 16 week groups showed a tendency of higher values. By Peyer's DNA % in tail of 8 week group, DNA % in tail and TM of 16 week groups increased significantly over the control, Ultrastructural examination shows myeline figures and swollen mitochondria in parietal cells and intestinal epithelial cells of 8 and 16 weeks groups. After this study, we need further investigations on the safety of highly consumed foods which contain high contents of unsaturated fatty acid, largely imported and which are possible to be irradiated.
Keywords
irradiation food; alkaline comet assay; TBA; myeline figure;
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