Screening of soy protein-derived hypotriglyceridemic di-peptides in vitro and in vivo |
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Authors: | Nao Inoue Koji Nagao Kotaro Sakata Naomi Yamano Pathma Elgoda Ranawakage Gunawardena Seo-Young Han Toshiro Matsui Toshihiro Nakamori Hitoshi Furuta Kiyoharu Takamatsu Teruyoshi Yanagita |
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Affiliation: | 1. Department of Biotechnology, Lund University, P.O. Box 124, SE-221 00, Lund, Sweden 2. Department of Clinical Sciences, Laboratory of Gastroenterology and Nutrition, Biomedical Centre B11, Lund University, SE-221 84, Lund, Sweden
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Abstract: | Background Postprandial lipaemia varies with gender and the composition of dietary fat due to the partitioning of fatty acids between beta-oxidation and incorporation into triacylglycerols (TAGs). Increasing evidence highlights the importance of postprandial measurements to evaluate atherogenic risk. Postprandial effects of alpha-linolenic acid (ALA) in women are poorly characterized. We therefore studied the postprandial lipid response of women to an ALA-rich oil in comparison with olive oil and butter, and characterized the fatty acid composition of total lipids, TAGs, and non-esterified fatty acids (NEFAs) in plasma. Methods A randomized crossover design (n = 19) was used to compare the postprandial effects of 3 meals containing 35 g fat. Blood samples were collected at regular intervals for 7 h. Statistical analysis was carried out with ANOVA (significant difference = P < 0.05). Results No significant difference was seen in incremental area under the curve (iAUC) plasma-TAG between the meals. ALA and oleic acid levels were significantly increased in plasma after ALA-rich oil and olive oil meals, respectively. Palmitic acid was significantly increased in plasma-TAG after the butter meal. The ratios of 18:2 n-6 to18:3 n-3 in plasma-TAGs, three and seven hours after the ALA-rich oil meal, were 1.5 and 2.4, respectively. The corresponding values after the olive oil meal were: 13.8 and 16.9; and after the butter meal: 9.0 and 11.6. Conclusions The postprandial p-TAG and NEFA response in healthy pre-menopausal women was not significantly different after the intake of an ALA-rich oil, olive oil and butter. The ALA-rich oil significantly affected different plasma lipid fractions and improved the ratio of n-6 to n-3 fatty acids several hours postprandially. |
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