title: Identification of 3 alpha, 6 alpha, 7 alpha, 12 alpha-tetrahydroxy-5 beta-cholestanoic acid in Zellweger's syndrome.
abstract: In order to confirm the occurrence of 3 alpha, 6 alpha, 7 alpha, 12 alpha-tetrahydroxy-5 beta-cholestanoic acid in Zellweger's syndrome, the nature of tetrahydroxycholestanoic acids present in a patient with this disease was studied. Urinary bile acids were extracted with a Sep-pak C18 cartridge and methylated after alkaline hydrolysis. The methyl esters were purified by silica gel column chromatography, and the methyl tetrahydroxycholestanoate fraction was analyzed by gas liquid chromatography-mass spectrometry. Along with already known side chain hydroxylated derivatives of 3 alpha, 7 alpha, 12 alpha-trihydroxy-5 beta-cholestanoic acid, 3 alpha, 7 alpha, 12 alpha, 24- and 3 alpha, 7 alpha, 12 alpha, 26-tetrahydroxy-5 beta-cholestanoic acids, three nuclear hydroxylated derivatives of 3 alpha, 7 alpha, 12 alpha-trihydroxy-5 beta-cholestanoic acid were found. One of them was identified as 3 alpha, 6 alpha, 7 alpha, 12 alpha-tetrahydroxy-5 beta-cholestanoic acid by direct comparison with the authentic standard which was chemically synthesized from 3 alpha, 6 alpha, 7 alpha, 12 alpha-tetrahydroxy-5 beta-cholanoic acid by side chain elongation.
authors.affiliation: Institute of Pharmaceutical Sciences, Hiroshima University School of Medicine.
authors.forename: M
authors.initials: M
authors.lastname: Une
authors.forename: N
authors.initials: N
authors.lastname: Kisaka
authors.forename: M
authors.initials: M
authors.lastname: Yoshii
authors.forename: T
authors.initials: T
authors.lastname: Hoshita
mesh_terms: D001647:Bile Acids and Salts / Q000652:urine; D002777:Cholestanols / Q000138:chemical synthesis / Q000652:urine*; D002849:Chromatography, Gas; D006801:Humans; D007223:Infant; D015211:Zellweger Syndrome / Q000652:urine*
chemical_list: D001647:Bile Acids and Salts; D002777:Cholestanols; C062293:3,6,7,12-tetrahydroxycholestanoic acid