title: Studies on neurosteroids XII. Determination of enzymatically formed catechol estrogens and guaiacol estrogens by rat brains using liquid chromatography-mass spectrometry-mass spectrometry.
abstract: Enzymic formations of catechol- and guaiacol-estrogens by rat brains have been investigated using classical- and catechol-estrogens as substrates, respectively. The incubation mixtures were pretreated with liquid-liquid and/or solid-phase extraction, and the products were identified by comparison with authentic samples using liquid chromatography-mass spectrometry (-mass spectrometry) [LC-MS (-MS)]. The enzymic activities were also determined by measuring the formed products with LC-MS.
authors.affiliation: Faculty of Pharmaceutical Sciences, Kanazawa University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Mitamura
authors.forename: M
authors.initials: M
authors.lastname: Yatera
authors.forename: K
authors.initials: K
authors.lastname: Shimada
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D002394:Catechol O-Methyltransferase / Q000378:metabolism*; D002396:Catechols / Q000737:chemistry; D002853:Chromatography, Liquid / Q000379:methods*; D019363:Cytochrome P-450 CYP1A1; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D004967:Estrogens / Q000032:analysis* / Q000096:biosynthesis / Q000737:chemistry; D006139:Guaiacol / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods*; D051381:Rats; D017208:Rats, Wistar; D013250:Steroid Hydroxylases / Q000378:metabolism*
chemical_list: D002396:Catechols; D004967:Estrogens; D006139:Guaiacol; D003577:Cytochrome P-450 Enzyme System; D013250:Steroid Hydroxylases; D019363:Cytochrome P-450 CYP1A1; C020120:estrogen 2-hydroxylase; D002394:Catechol O-Methyltransferase; C034221:catechol