Influence of bile acids upon biliary cholesterol and phospholipid secretion in the dog. 1976

R Poupon, and R Poupon, and M L Grosdemouge, and M Dumont, and S Erlinger

The relationship between taurocholate or taurochenodeoxycholate secretion and cholesterol and phospholipid secretion in bile was studied in anaesthetized dogs infused with graded doses of these bile acids. Cholesterol output was linearly related to bile acid output during both taurocholate and taurochenodeoxycholate infusions. On the average 1.45 nmol and 4.70 nmol of cholesterol were secreted per mumol of taurocholate or taurochenodeoxycholate respectively (P less than 0.001). A linear relationship was also observed between phospholipid secretion rate and taurocholate or taurochenodeoxycholate secretion rates. However, the amounts of phospholipid secreted per mumol of taurocholate or taurochenodeoxycholate (respectively 0.10 and 0.15 mumol) were not significantly different. Thus, bile was less saturated with cholesterol during taurocholate infusions than during taurochenodeoxycholate infusions. These results are consistent with the hypothesis that micelle formation by bile acids is a major determinant of cholesterol and phospholipid secretion in the dog.

UI MeSH Term Description Entries
D010743 Phospholipids Lipids containing one or more phosphate groups, particularly those derived from either glycerol (phosphoglycerides see GLYCEROPHOSPHOLIPIDS) or sphingosine (SPHINGOLIPIDS). They are polar lipids that are of great importance for the structure and function of cell membranes and are the most abundant of membrane lipids, although not stored in large amounts in the system. Phosphatides,Phospholipid
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
D002793 Cholic Acids The 3 alpha,7 alpha,12 alpha-trihydroxy-5 beta-cholanic acid family of bile acids in man, usually conjugated with glycine or taurine. They act as detergents to solubilize fats for intestinal absorption, are reabsorbed by the small intestine, and are used as cholagogues and choleretics. Cholalic Acids,Acids, Cholalic,Acids, Cholic
D004285 Dogs The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065) Canis familiaris,Dog
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
D001646 Bile An emulsifying agent produced in the LIVER and secreted into the DUODENUM. Its composition includes BILE ACIDS AND SALTS; CHOLESTEROL; and ELECTROLYTES. It aids DIGESTION of fats in the duodenum. Biliary Sludge,Sludge, Biliary
D013656 Taurocholic Acid The product of conjugation of cholic acid with taurine. Its sodium salt is the chief ingredient of the bile of carnivorous animals. It acts as a detergent to solubilize fats for absorption and is itself absorbed. It is used as a cholagogue and cholerectic. Cholyltaurine,Taurine Cholate,Taurocholate,Sodium Taurocholate,Taurocholate Sodium,Taurocholic Acid, (5 alpha)-Isomer,Taurocholic Acid, (7 beta)-Isomer,Taurocholic Acid, Monolithium Salt,Taurocholic Acid, Monosodium Salt,Taurocholate, Sodium

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