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  • Title: Similarity of unusual bile acids in human umbilical cord blood and amniotic fluid from newborns and in sera and urine from adult patients with cholestatic liver diseases.
    Author: Shoda J, Mahara R, Osuga T, Tohma M, Ohnishi S, Miyazaki H, Tanaka N, Matsuzaki Y.
    Journal: J Lipid Res; 1988 Jul; 29(7):847-58. PubMed ID: 3411245.
    Abstract:
    Unusual bile acids in umbilical cord blood and amniotic fluid of term newborns and in sera and urine from adult patients with cholestatic liver diseases were analyzed by use of gas-liquid chromatography-mass spectrometry. These bile acids were compared in order to elucidate possible similarities of bile acid metabolism between fetal and cholestatic liver. In both umbilical cord blood and amniotic fluid, 14 unusual bile acids were found in addition to normal bile acids (cholic, chenodeoxycholic, deoxycholic, and lithocholic acids), and 15, excluding ursodeoxycholic acid, were found in sera and urine from patients with cholestatic liver diseases. Of the unusual bile acids detected, 12 were common to both samples. Six unusual bile acids, 3 beta-hydroxy- and 3 beta,12 alpha-dihydroxy-5-cholenoic acids, 3 alpha,6 alpha,7 alpha-trihydroxy-5 beta-cholanoic acid, 1 beta,3 alpha,12 alpha-trihydroxy-1 beta,3 alpha,7 alpha-trihydroxy-, and 1 beta,3 alpha,7 alpha,12 alpha-tetrahydroxy-5 beta-cholanoic acids were more abundant than others. They could be classified into three groups, i.e., unsaturated, 6-hydroxylated, and 1 beta-hydroxylated bile acids. 1 beta-Hydroxylated bile acids, which were not found in serum specimens, were detected in sera from umbilical cord blood and from patients with cholestatic liver diseases. The presence of these unusual bile acids suggested similarities between the altered metabolic states of the two groups examined.
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