Dietary manipulation by perilla oil and fish oil of hepatic lipids and its influence on peroxisomal beta-oxidation and serum lipids in rat and mouse.
Rats and mice were fed a diet, prepared with soybean oil (SO), perilla oil (PO) or fish oil (FO), for 4 weeks. Compared with the groups of SO-feeding, FO-feeding increased content of eicosapentaenoic acid (20:5 n-3), docosapentaenoic acid (22:5 n-3) and docosahexaenoic acid (22:6 n-3) and PO-feeding elevated the content of alpha-linolenic acid (18:3 n-3), 20:5 n-3 and 22:5 n-3 or hepatic lipids of both rats and mice. FO-feeding increased the activity of peroxisomal beta-oxidation in the livers of both rats and mice. The activities of peroxisomal beta-oxidation in rats and mice that were fed FO diet at a high fat (40% of energy) concentration corresponded to 20% and 30%, respectively, of the maximum activities induced by peroxisome proliferators (4-chlorophenoxyisobutyric acid or perfluorooctanoic acid). To a lesser extent, PO-feeding elevated this activity too. There were significant correlations between peroxisomal beta-oxidation activity and the content of either 20:5 n-3, 22:5 n-3 or 22:6 n-3 in hepatic lipids. FO-feeding decreased effectively serum level of cholesterol of both rats and mice. The reduction in serum cholesterol by feeding PO was less pronounced than that observed with FO-feeding. A high correlation was found between 22:6 n-3 content in hepatic lipids and serum concentration of cholesterol. Although FO-feeding lowered the level of circulating triacylglycerol, PO-feeding produced no change. No substantial correlation was observed between the hepatic content of n-3 fatty acid and the concentration of serum triacylglycerol.(ABSTRACT TRUNCATED AT 250 WORDS)
Kawashima
Y
Y
Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Japan.
Kozuka
H
H
D000818:Animals; D004041:Dietary Fats / Q000494:pharmacology*; D005227:Fatty Acids / Q000378:metabolism; D005395:Fish Oils / Q000494:pharmacology*; D008041:Linoleic Acids / Q000494:pharmacology*; D050356:Lipid Metabolism; D008055:Lipids / Q000097:blood; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D051379:Mice; D008830:Microbodies / Q000378:metabolism*; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D017962:alpha-Linolenic Acid
D004041:Dietary Fats; D005227:Fatty Acids; D005395:Fish Oils; D008041:Linoleic Acids; D008055:Lipids; D010938:Plant Oils; D017962:alpha-Linolenic Acid; C058216:perilla seed oil