title: Profiling analysis of biogenic amines and their acidic metabolites in mouse brain tissue using gas chromatography-tandem mass spectrometry.
abstract: The profiling analysis of biogenic amines, including catecholamines and serotonin, and their metabolites in mouse brain tissue provides an important key to understanding their roles in the body and the possibility of simple and accurate diagnosis of neural diseases. A novel approach in the analysis of biogenic amines and their acidic metabolites in brain tissue using gas chromatography-tandem mass spectrometry (GC-MS/MS) is presented. Biogenic amines and their acidic metabolites in brain tissue were effectively separated using a mixed-cation-exchange solid-phase extraction (MCX-SPE) cartridge with a variation in the composition of the SPE elution solvents. A selective derivatization with hexamethyldisilazane (HMDS) and N-methyl-bis-heptafluorobutyramide (MBHFBA) was used to increase the detection sensitivity and to prevent the formation of any side-products. The identification and quantification of the target analytes were performed by gas chromatography triple quadrupole mass spectrometry (GC-MS/MS) using multiple ion reaction monitoring (MRM) mode. The overall recovery yields of the biogenic amines and their metabolites were above 87.5% at 10ng/g and 92.4% at 100ng/g of spiking concentration range. The isotopic-labeled internal standards were used for the precise quantification of bioamines and their metabolites. The calibration curves for the biogenic amines and their metabolites obtained through GC-MS/MS were linear (r(2)>0.995) over the concentration range of 1 (2 or 3)-200ng/mL. The present method was reproducible (relative standard deviation range 0.6-9.3%) and accurate (range 85.4-107.9%), with LLOQs of 0.71-3.69ng/mL. The developed method was successfully applied to the determination and quantification of bioamines and their metabolites in rat brain tissue samples.
authors.affiliation: College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea.
authors.forename: Joo Yeon
authors.initials: JY
authors.lastname: Hong
authors.forename: Na Hyun
authors.initials: NH
authors.lastname: Park
authors.forename: Myung Sook
authors.initials: MS
authors.lastname: Oh
authors.forename: Hye-Sook
authors.initials: HS
authors.lastname: Lee
authors.forename: Heesoo
authors.initials: H
authors.lastname: Pyo
authors.forename: Jongki
authors.initials: J
authors.lastname: Hong
mesh_terms: D000818:Animals; D001679:Biogenic Amines / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D001923:Brain Chemistry; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D057230:Limit of Detection; D016014:Linear Models; D000432:Methanol / Q000737:chemistry; D051379:Mice; D008810:Mice, Inbred C57BL; D015203:Reproducibility of Results; D052616:Solid Phase Extraction; D053719:Tandem Mass Spectrometry / Q000379:methods
chemical_list: D001679:Biogenic Amines; D000432:Methanol
keywords: Acidic metabolites; Biogenic amines; GC–MS/MS; Mouse brain tissues; Selective derivatization