Comparative effects of flaxseed and sesame seed on vitamin E and cholesterol levels in rats |
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Authors: | Email author" target="_blank">Kanae?YamashitaEmail author Saiko?Ikeda Mariko?Obayashi |
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Affiliation: | (1) Department of Food and Nutrition, School of Life Studies, Sugiyama Jogakuen University, 17-3 Hoshigaoka Motomachi, Chikusa-ku, 464-8662 Nagoya, Japan |
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Abstract: | Flaxseed and sesame seed both contain more than 40% fat, about 20% protein, and vitamin E, mostly γ-tocopherol. Furthermore,
both contain considerable amounts of plant lignans. However, flaxseed contains 54% α-linolenic acid, but sesame seed only
0.6%, and the chemical structures of flaxseed and sesame lignans are different. In this study, we investigated the differential
effects of flaxseed and sesame seed on plasma and tissue γ-tocopherol, TBARS, and cholesterol concentrations. Rats were fed
experimental diets for 4 wk: vitamin E-free, (-VE), γ-tocopherol, flaxseed (FS), sesame seed (SS), flaxseed oil (FO), FO with
sesamin (FOS), and defatted flaxseed (DFF). SS and FOS diets induced significantly higher γ-tocopherol concentrations in plasma
and liver compared with FS, FO, and DFF diets. Groups fed FS, FO, and FOS showed lower plasma total cholesterol compared with
the SS and DFF groups. Higher TBARS concentrations in plasma and liver were observed in the FS and FO groups but not in the
FOS groups. These results suggest that sesame seed and its lignans induced higher γ-tocopherol and lower TBARS concentrations,
whereas flaxseed lignans had no such effects. Further, α-linolenic acid produced strong plasma cholesterol-lowering effects
and higher TBARS concentrations. |
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Keywords: | |
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