title: Simultaneous determination of endocannabinoids (arachidonylethanolamide and 2-arachidonylglycerol) and isoprostane (8-epiprostaglandin F2alpha) by gas chromatography-mass spectrometry-selected ion monitoring for medical samples.
abstract: This article describes the overall procedure for the simultaneous determination of endocannabinoids (arachidonylethanolamide and 2-arachidonyglycerol) and isoprostane by gas chromatography-mass spectrometry in the selected-ion monitoring SIM mode (GC-MS-SIM) for medical samples. It also describes the general points of this method which a scientist who wants to assay a new, unidentified prostanoids and related compounds in medical samples would need to be clarified. The similar structures of prostaglandins, thromboxane, their metabolites, isoprostane, and arachidonyl compounds, allow them to be assayed after the simultaneous preparation of a single sample. The dimethyl isopropylsilyl ether forms of derivatized compounds are suitable for multiple GC-MS-SIM assay because of their molecular stability, and because they produce positive, strong, and large fragments on MS.
authors.affiliation: Department of Molecular Cell Biology, Institute of DNA Medicine, Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato-ku, Tokyo 105-8461, Japan. abatat@jikei.ac.jp
authors.forename: Toru
authors.initials: T
authors.lastname: Obata
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Sakurai
authors.forename: Youichi
authors.initials: Y
authors.lastname: Kase
authors.forename: Yasumasa
authors.initials: Y
authors.lastname: Tanifuji
authors.forename: Toru
authors.initials: T
authors.lastname: Horiguchi
mesh_terms: D001095:Arachidonic Acids / Q000097:blood*; D063388:Endocannabinoids; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D005989:Glycerides / Q000097:blood*; D006801:Humans; D028421:Isoprostanes / Q000097:blood*; D053284:Polyunsaturated Alkamides; D012680:Sensitivity and Specificity; D012772:Shock, Septic / Q000097:blood
chemical_list: D001095:Arachidonic Acids; D063388:Endocannabinoids; D005989:Glycerides; D028421:Isoprostanes; D053284:Polyunsaturated Alkamides; C094503:glyceryl 2-arachidonate; C078814:anandamide