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  • Title: Bile acid structure and biliary lipid secretion. II. A comparison of three hydroxy and two keto bile acids.
    Author: Hoffman NE, Sewell RB, Smallwood RA.
    Journal: Am J Physiol; 1978 Jun; 234(6):E637-40. PubMed ID: 665767.
    Abstract:
    The effect of five bile acids on biliary lipid secretion was studied in the pentobarbital-anesthetized cat. The dihydroxy acid, taurohyodeoxycholic acid, was indistinguishable from another dihydroxy acid, taurochenodeoxycholic acid, but secretion of both phospholipid and cholesterol was considerably reduced with two mono-keto dihydroxy acids, tauro-3alpha,12alpha-dihydroxy-7-keto-5beta-cholanoic acid and tauro-3alpha,7alpha-dihydroxy-12-keto-5beta-cholanoic acid. The effect of a trihydroxy bile acid, taurocholic acid was as previously described. The effect of the keto bile acids may be explained by the ability of these bile acids to solubilize lipid, but such an explanation is inadequate for the difference between di- and trihydroxy bile acids. An intracellular effect of bile acid is postulated.
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