title: Sterol 27-hydroxylase: expression in human arterial endothelium.
abstract: Human endothelium obtained from both the aorta and the pulmonary artery has been evaluated for the presence of the messenger RNA coding for the expression of sterol 27-hydroxylase. Unique oligomers were designed to detect the mRNA by reverse transcription followed by the polymerase chain reaction. The amplified product was sequenced and was found to be identical to the published sequence for nucleotides 491 to 802 of the human sterol 27-hydroxylase cDNA. Northern blot analysis confirmed the presence of 27-hydroxylase mRNA in pulmonary artery and aortic endothelium. As part of these studies, enzymatic activity was assayed in cultured arterial endothelium using cholesterol as a substrate and isotope ratio gas-liquid chromatography-mass spectrometry to identify the metabolites, 27-hydroxycholesterol and 3 beta-hydroxy-5-cholestenoic acid, in the medium. Localization of sterol 27-hydroxylase to vascular endothelium indicates intracellular production of the biologically active metabolite 27-hydroxycholesterol.
authors.affiliation: Division of Hepatic Diseases, New York University Medical Center, NY 10016, USA.
authors.forename: A B
authors.initials: AB
authors.lastname: Reiss
authors.forename: K O
authors.initials: KO
authors.lastname: Martin
authors.forename: D E
authors.initials: DE
authors.lastname: Rojer
authors.forename: S
authors.initials: S
authors.lastname: Iyer
authors.forename: E A
authors.initials: EA
authors.lastname: Grossi
authors.forename: A C
authors.initials: AC
authors.lastname: Galloway
authors.forename: N B
authors.initials: NB
authors.lastname: Javitt
mesh_terms: D001011:Aorta / Q000166:cytology; D001483:Base Sequence; D015152:Blotting, Northern; D002478:Cells, Cultured; D053493:Cholestanetriol 26-Monooxygenase; D002784:Cholesterol / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis / Q000235:genetics*; D017931:DNA Primers / Q000737:chemistry; D004587:Electrophoresis, Agar Gel; D004730:Endothelium, Vascular / Q000737:chemistry / Q000378:metabolism*; D015971:Gene Expression Regulation, Enzymologic / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011651:Pulmonary Artery / Q000166:cytology; D012333:RNA, Messenger / Q000032:analysis* / Q000235:genetics; D013250:Steroid Hydroxylases / Q000096:biosynthesis / Q000235:genetics*
chemical_list: D017931:DNA Primers; D012333:RNA, Messenger; D003577:Cytochrome P-450 Enzyme System; D002784:Cholesterol; D013250:Steroid Hydroxylases; C506831:CYP27A1 protein, human; D053493:Cholestanetriol 26-Monooxygenase