title: Variability assessment of (15)N metabolic labeling-based proteomics workflow in mouse plasma and brain.
abstract: (15)N metabolic labeling-based quantitative proteomics is used for the identification of disease- and phenotype-related alterations in live organisms. The variability of (15)N metabolic labeling proteomics workflows has been assessed in plants and bacteria. However, no study has addressed this topic in mice. We have investigated the repeatability of a quantitative in vivo(15)N metabolic labeling proteomics workflow in mice by assessing LC variability, peptide and protein profiling characteristics and overall (15)N/(14)N protein quantification accuracy in technical replicates of plasma and brain specimens. We furthermore examined how sample preparation affects these parameters in plasma and brain. We found that specimen type (i.e. plasma or brain) influences the variability of the (15)N metabolic labeling workflow in an LC-independent manner.
authors.affiliation: Max Planck Institute of Psychiatry, Kraepelinstr. 2, Munich, 80804, Germany. maccarrone@mpipsykl.mpg.de.
authors.forename: Michaela D
authors.initials: MD
authors.lastname: Filiou
authors.forename: Magdalena
authors.initials: M
authors.lastname: Soukupova
authors.forename: Christiane
authors.initials: C
authors.lastname: Rewerts
authors.forename: Christian
authors.initials: C
authors.lastname: Webhofer
authors.forename: Chris W
authors.initials: CW
authors.lastname: Turck
authors.forename: Giuseppina
authors.initials: G
authors.lastname: Maccarrone
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis / Q000097:blood / Q000378:metabolism*; D001921:Brain / Q000378:metabolism*; D002853:Chromatography, Liquid; D007553:Isotope Labeling; D008297:Male; D051379:Mice; D009587:Nitrogen Isotopes / Q000032:analysis / Q000097:blood / Q000378:metabolism*; D020543:Proteome / Q000032:analysis / Q000378:metabolism*; D040901:Proteomics / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry
chemical_list: D015415:Biomarkers; D009587:Nitrogen Isotopes; D020543:Proteome