title: Determination of 3 beta-hydroxy-5-cholen-24-oic acid and its sulfate in human serum by gas chromatography-mass spectrometry.
abstract: The glycine conjugate of 3 beta-hydroxy-5-cholen-24-oic acid and its sulfate labeled with deuterium at the C-2, -4, and -23 positions were synthesized. A highly sensitive and specific quantitative assay of the bile acid has been developed by selected ion monitoring in gas chromatography-mass spectrometry of the methyl ester trimethylsilyl ether derivatives using the deuterium labeled conjugates as internal standards. Calibration curves for the bile acid and its sulfate exhibited a linear relationship over the range of 0.01-100 micrograms/ml in human serum.
mesh_terms: D001647:Bile Acids and Salts / Q000097:blood; D002793:Cholic Acids / Q000097:blood*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans
chemical_list: D001647:Bile Acids and Salts; D002793:Cholic Acids; C014596:3 beta-hydroxy-delta 5-cholenic acid; C046265:3-hydroxy-5-cholen-24-oic acid 3-sulfate ester