title: LC/ESI-tandem mass spectrometric determination of bile acid 3-sulfates in human urine 3beta-Sulfooxy-12alpha-hydroxy-5beta-cholanoic acid is an abundant nonamidated sulfate.
abstract: We developed a highly sensitive and quantitative method to detect bile acid 3-sulfates in human urine employing liquid chromatography/electrospray ionization-tandem mass spectrometry. This method allows simultaneous analysis of bile acid 3-sulfates, including nonamidated, glycine-, and taurine-conjugated bile acids, cholic acid (CA), chenodeoxycholic acid (CDCA), deoxycholic acid (DCA), ursodeoxycholic acid (UDCA), and lithocholic acid (LCA), using selected reaction monitoring (SRM) analysis. The method was applied to analyze bile acid 3-sulfates in human urine from healthy volunteers. The results indicated an unknown compound with the nonamidated common bile acid 3-sulfates on the chromatogram obtained by the selected reaction monitoring analysis. By comparison of the retention behavior and MS/MS spectrum of the unknown peak with the authentic specimen, the unknown compound was identified as 3beta,12alpha-dihydroxy-5beta-cholanoic acid 3-sulfate.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Goto
authors.forename: Khin Than
authors.initials: KT
authors.lastname: Myint
authors.forename: Koichi
authors.initials: K
authors.lastname: Sato
authors.forename: Osamu
authors.initials: O
authors.lastname: Wada
authors.forename: Genta
authors.initials: G
authors.lastname: Kakiyama
authors.forename: Takashi
authors.initials: T
authors.lastname: Iida
authors.forename: Takanori
authors.initials: T
authors.lastname: Hishinuma
authors.forename: Nariyasu
authors.initials: N
authors.lastname: Mano
authors.forename: Junichi
authors.initials: J
authors.lastname: Goto
mesh_terms: D000328:Adult; D001647:Bile Acids and Salts / Q000652:urine*; D002793:Cholic Acids / Q000652:urine*; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: C518438:3beta-sulfooxy-12alpha-hydroxy-5beta-cholanoic acid; D001647:Bile Acids and Salts; D002793:Cholic Acids; C020980:bile acid sulfates