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Lack of 3 beta-hydroxy-delta 5-C27-steroid dehydrogenase/isomerase in fibroblasts from a child with urinary excretion of 3 beta-hydroxy-delta 5-bile acids. A new inborn error of metabolism. 1990

M S Buchmann, and E A Kvittingen, and H Nazer, and T Gunasekaran, and P T Clayton, and J Sjövall, and I Björkhem
Institute of Clinical Biochemistry, Rikshospitalet, University of Oslo, Norway.

Cultured fibroblasts were shown to be capable of catalyzing the conversion of 7 alpha-hydroxy-cholesterol to 7 alpha-hydroxy-4-cholesten-3-one, an important reaction in bile acid synthesis. The apparent Km was approximately 7 mumol/liter and Vmax varied between 3 and 9 nmol/mg protein per h under the assay conditions used. The assay was used to investigate fibroblasts from a patient who presented with a familial giant cell hepatitis and who was found to excrete the monosulfates of 3 beta, 7 alpha-dihydroxy-5-cholenoic acid and 3 beta, 7 alpha, 12 alpha-trihydroxy-5-cholenoic acid in urine (Clayton, P. T., J. V. Leonard, A. M. Lawson, K. D. R. Setchell, S. Andersson, B. Egestad, and J. Sjövall. 1987. J. Clin. Invest. 79:1031-1038). In addition 7 alpha-hydroxy-cholesterol was found to accumulate in the circulation. Cultured fibroblasts from this boy were completely devoid of 3 beta-hydroxy-delta 5-C27-steroid dehydrogenase/isomerase activity. Fibroblasts from his parents had reduced activity, compatible with a heterozygous genotype. The results provide strong evidence for the suggestion that this patient's liver disease was caused by a primary defect in the 3 beta-hydroxy-delta 5-C27-steroid dehydrogenase/isomerase involved in bile acid biosynthesis.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008052 Lipid Metabolism, Inborn Errors Errors in the metabolism of LIPIDS resulting from inborn genetic MUTATIONS that are heritable. Lipid Metabolism, Inborn Error
D008297 Male Males
D010375 Pedigree The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition. Family Tree,Genealogical Tree,Genealogic Tree,Genetic Identity,Identity, Genetic,Family Trees,Genealogic Trees,Genealogical Trees,Genetic Identities,Identities, Genetic,Tree, Family,Tree, Genealogic,Tree, Genealogical,Trees, Family,Trees, Genealogic,Trees, Genealogical
D005347 Fibroblasts Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules. Fibroblast
D005723 gamma-Glutamyltransferase An enzyme, sometimes called GGT, with a key role in the synthesis and degradation of GLUTATHIONE; (GSH, a tripeptide that protects cells from many toxins). It catalyzes the transfer of the gamma-glutamyl moiety to an acceptor amino acid. GGTP,Glutamyl Transpeptidase,gammaglutamyltransferase,gamma-Glutamyl Transpeptidase,Transpeptidase, Glutamyl,Transpeptidase, gamma-Glutamyl,gamma Glutamyl Transpeptidase,gamma Glutamyltransferase
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006863 Hydrogen-Ion Concentration The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D001647 Bile Acids and Salts Steroid acids and salts. The primary bile acids are derived from cholesterol in the liver and usually conjugated with glycine or taurine. The secondary bile acids are further modified by bacteria in the intestine. They play an important role in the digestion and absorption of fat. They have also been used pharmacologically, especially in the treatment of gallstones. Bile Acid,Bile Salt,Bile Salts,Bile Acids,Acid, Bile,Acids, Bile,Salt, Bile,Salts, Bile

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