Potential Bile Acid Metabolites. 25. Synthesis and Chemical Properties of Stereoisomeric 3.ALPHA.,7.ALPHA.,16- and 3.ALPHA.,7.ALPHA.,15-Trihydroxy-5.BETA.-cholan-24-oic Acids.
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چکیده
منابع مشابه
Identification of human hepatic cytochrome p450 enzymes involved in the biotransformation of cholic and chenodeoxycholic acid.
3alpha,7alpha,12alpha-trihydroxy-5beta-cholan-24-oic (cholic) and 3alpha,7alpha-dihydroxy-5beta-cholan-24-oic (chenodeoxycholic) acids are the predominant hepatic and biliary bile acids of most mammalian species including humans. Cholic and chenodeoxycholic acids are synthesized from cholesterol and accumulate in the liver during cholestasis. Biotransformation by hepatic cytochrome P450 (P450) ...
متن کاملBile salts of germ-free domestic fowl and pigs.
1. The bile of germ-free domestic fowl contains taurine conjugates of 3alpha,7alpha-dihydroxy-5beta-cholan-24-oic acid (chenodeoxycholic acid), 3alpha,7alpha,12alpha-trihydroxy-5beta-cholan-24-oic acid (cholic acid) and its 5alpha-epimer (allocholic acid): that of germ-free pigs contains glycine and taurine conjugates of chenodeoxycholic acid, 3alpha,6alpha-dihydroxy-5beta-cholan-24-oic acid (h...
متن کاملIdentification of bile acids in the serum and urine in cholestasis. Evidence for 6alpha-hydroxylation of bile acids in man.
In this qualitative study of the pattern of bile acid excretion in cholestasis, methods are described for the isolation of bile acids from large volumes of urine and plasma. The bile acids were subjected to a group separation and identified by combined gas chromatography-mass spectrometry. The techniques were developed to allow identification of the minor components of the bile acid mixture. Fo...
متن کاملIdentification of a novel bile acid in swans, tree ducks, and geese: 3a,7a,15a-trihydroxy-5b-cholan-24-oic acid
By HPLC, a taurine-conjugated bile acid with a retention time different from that of taurocholate was found to be present in the bile of the black-necked swan, Cygnus melanocoryphus. The bile acid was isolated and its structure, established by H and C NMR and mass spectrometry, was that of the taurine N-acyl amidate of 3a,7a,15a-trihydroxy5b-cholan-24-oic acid. The compound was shown to have ch...
متن کاملPhysicochemical and biological properties of natural and synthetic C-22 and C-23 hydroxylated bile acids.
In order to define the effect of a side chain hydroxy group on bile acid (BA) physicochemical and biological properties, 23-hydroxylated bile acids were synthesized following a new efficient route involving the alpha-oxygenation of silylalkenes. 22-Hydroxylated bile acids were also studied. The synthesized bile acids included R and S epimers of 3 alpha,7 alpha,23-trihydroxy-5 beta-cholan-24-oic...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 2002
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.50.1327