title: Effects of structured lipids containing eicosapentaenoic or docosahexaenoic acid and caprylic acid on serum and liver lipid profiles in rats.
abstract: The physiological activity and effect on lipid metabolism of four types of structured lipids (SLs), that contain caprylic acid (C8) and either eicosapentaenoic (EPA) or docosahesaenoic acid (DHA), were evaluated in male Wistar rats fed experimental diets containing 7% (wt %) of each SL and 3% (wt %) soybean oil for 28 days. Control rats were fed a diet containing 10% (wt %) soybean oil. The relative perirenal adipose tissue weights of rats fed D-8-8 and 8-D-8 diets were significantly lower than those of other groups. We observed significantly lower serum cholesterol concentrations in rats fed SLs than those of control group over experimental period. The serum lipids concentrations in rats fed diets containing SLs were significantly lower P < 0.05) than those of soybean oil group. The fatty acid compositions of WAT did not reflect the structural differences in the triglyceride. These results suggest that the physiological effects of the SLs used in this study were due to the fatty acids rather than the structural specificity. Therefore, further study will be needed to ascertain the most desirable structural configuration.
authors.affiliation: Division of Food Science, Incorporated Administrative Agency, National Institute of Health and Nutrition, 1-23-1 Toyama, Shinjuku-Ku, Tokyo 162-8636, Japan. jnagata@nih.go.jp
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Nagata
authors.forename: Michio
authors.initials: M
authors.lastname: Kasai
authors.forename: Satoshi
authors.initials: S
authors.lastname: Negishi
authors.forename: Morio
authors.initials: M
authors.lastname: Saito
mesh_terms: D000273:Adipose Tissue / Q000187:drug effects / Q000378:metabolism; D000818:Animals; D004281:Docosahexaenoic Acids / Q000494:pharmacology*; D015118:Eicosapentaenoic Acid / Q000494:pharmacology*; D007700:Kinetics; D008049:Lipase / Q000378:metabolism; D050356:Lipid Metabolism; D008055:Lipids / Q000097:blood* / Q000494:pharmacology; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D051381:Rats; D017208:Rats, Wistar
chemical_list: D008055:Lipids; D004281:Docosahexaenoic Acids; D015118:Eicosapentaenoic Acid; D008049:Lipase