title: Metabolic mapping using 2D 31P-MR spectroscopy reveals frontal and thalamic metabolic abnormalities in schizophrenia.
abstract: (31)Phosphorus magnetic resonance spectroscopy ((31)P-MRS) allows in vivo investigation of cerebral phospholipid and energy metabolism. Using 2D chemical shift imaging, this method can be applied to study multiple brain areas and to assess concentrations of both phospholipids and high-energy phosphates. The purpose of our study was to assess multiregional metabolic profiles in schizophrenia using a 2D-resolved MRS technique, and to assess the intercorrelation of findings. We applied (31)P-MRS chemical shift imaging in 31 schizophrenia patients (12 antipsychotic-naïve first-episode and 19 antipsychotic-free multi-episode patients) and 31 healthy age- and sex-matched controls. Spatially resolved maps were compared for the main metabolites of the (31)P spectrum. Metabolites of phospholipid (PME and PDE) and energy (PCr and Pi) metabolism were significantly reduced in bilateral prefrontal and medial temporal (including hippocampal) brain regions, caudate nucleus, thalamus and anterior cerebellum as compared to controls. Moreover, factor analysis of these changes showed a characteristic spatial pattern of changes, which demonstrates significant associations between alterations of phospholipid and energy metabolism, and between metabolic alterations and severity of symptoms (BPRS total score, but not SANS or SAPS scores). This suggests a pattern of intercorrelated changes of these metabolic markers. Results support the notion of disturbed phospholipid turnover in schizophrenia, probably unrelated to prior pharmacological treatment, and associated with increased energy demand.
authors.affiliation: Department of Psychiatry, Friedrich-Schiller-University Jena, Philosophenweg 3, D-07743 Jena, Germany. Stefan.Smesny@med.uni-jena.de
authors.forename: Stefan
authors.initials: S
authors.lastname: Smesny
authors.forename: Timm
authors.initials: T
authors.lastname: Rosburg
authors.forename: Igor
authors.initials: I
authors.lastname: Nenadic
authors.forename: Klaus Peter
authors.initials: KP
authors.lastname: Fenk
authors.forename: Sebastian
authors.initials: S
authors.lastname: Kunstmann
authors.forename: Reinhardt
authors.initials: R
authors.lastname: Rzanny
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Volz
authors.forename: Heinrich
authors.initials: H
authors.lastname: Sauer
mesh_terms: D000328:Adult; D001931:Brain Mapping; D004734:Energy Metabolism; D005260:Female; D005625:Frontal Lobe / Q000378:metabolism*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008297:Male; D053858:Metabolic Networks and Pathways; D010743:Phospholipids / Q000378:metabolism; D010759:Phosphorus Isotopes; D012559:Schizophrenia / Q000378:metabolism*; D013788:Thalamus / Q000378:metabolism*
chemical_list: D010743:Phospholipids; D010759:Phosphorus Isotopes