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Plasma lipoprotein cholesterol levels in rats fed a diet enriched in cholesterol and cholic acid. 1998

M T Chiang, and Y C Chen, and A L Huang
Department of Marine Food Science, National Taiwan Ocean University, Keelung, R.O.C.

To investigate the effects of dietary cholesterol and cholic acid on plasma cholesterol levels, rats fed a cholesterol-free diet or a diet enriched in cholesterol (0.5% or 1%) with or without cholic acid supplementation were studied for 4 weeks. Although 0.5% cholesterol supplementation showed no effect on plasma total cholesterol and LDL-cholesterol levels in rats fed a diet without cholic acid treatment, the addition of dietary cholic acid caused an increase in plasma total cholesterol, LDL-cholesterol and VLDL-cholesterol levels in rats fed a cholesterol-rich diet. There was no significant change in HDL-cholesterol levels among the dietary groups. Rats fed a diet enriched in cholesterol have increased liver total lipids and total cholesterol contents. In addition, lower liver lipid peroxide concentration was found in rats fed a cholesterol-rich diet when compared with those fed the control diet. It is interesting that cholic acid supplementation led to an increase in hepatic cholesterol content and a decrease in liver lipid peroxide concentration in rats fed a cholesterol-rich diet. Results from this study suggest that dietary cholesterol and cholic acid might play an important role in regulation of lipid metabolism in rats.

UI MeSH Term Description Entries
D008054 Lipid Peroxides Peroxides produced in the presence of a free radical by the oxidation of unsaturated fatty acids in the cell in the presence of molecular oxygen. The formation of lipid peroxides results in the destruction of the original lipid leading to the loss of integrity of the membranes. They therefore cause a variety of toxic effects in vivo and their formation is considered a pathological process in biological systems. Their formation can be inhibited by antioxidants, such as vitamin E, structural separation or low oxygen tension. Fatty Acid Hydroperoxide,Lipid Peroxide,Lipoperoxide,Fatty Acid Hydroperoxides,Lipid Hydroperoxide,Lipoperoxides,Acid Hydroperoxide, Fatty,Acid Hydroperoxides, Fatty,Hydroperoxide, Fatty Acid,Hydroperoxide, Lipid,Hydroperoxides, Fatty Acid,Peroxide, Lipid,Peroxides, Lipid
D008055 Lipids A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed) Lipid
D008074 Lipoproteins Lipid-protein complexes involved in the transportation and metabolism of lipids in the body. They are spherical particles consisting of a hydrophobic core of TRIGLYCERIDES and CHOLESTEROL ESTERS surrounded by a layer of hydrophilic free CHOLESTEROL; PHOSPHOLIPIDS; and APOLIPOPROTEINS. Lipoproteins are classified by their varying buoyant density and sizes. Circulating Lipoproteins,Lipoprotein,Lipoproteins, Circulating
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D009929 Organ Size The measurement of an organ in volume, mass, or heaviness. Organ Volume,Organ Weight,Size, Organ,Weight, Organ
D002784 Cholesterol The principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord, and in animal fats and oils. Epicholesterol
D002791 Cholesterol, Dietary Cholesterol present in food, especially in animal products. Dietary Cholesterol
D005526 Food, Formulated Food and dietary formulations including elemental (chemically defined formula) diets, synthetic and semisynthetic diets, space diets, weight-reduction formulas, tube-feeding diets, complete liquid diets, and supplemental liquid and solid diets. Diet, Chemically Defined,Diet, Elemental,Diet, Formula,Diet, Synthetic,Dietary Formulations,Chemically Defined Diet,Synthetic Diet,Chemically Defined Diets,Dietary Formulation,Diets, Chemically Defined,Diets, Elemental,Diets, Formula,Diets, Synthetic,Elemental Diet,Elemental Diets,Foods, Formulated,Formulated Food,Formulated Foods,Formulation, Dietary,Formulations, Dietary
D000284 Administration, Oral The giving of drugs, chemicals, or other substances by mouth. Drug Administration, Oral,Administration, Oral Drug,Oral Administration,Oral Drug Administration,Administrations, Oral,Administrations, Oral Drug,Drug Administrations, Oral,Oral Administrations,Oral Drug Administrations
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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