Striatal neurometabolite levels in patients with schizophrenia undergoing long-term antipsychotic treatment: A proton magnetic resonance spectroscopy and reliability study.

TitleStriatal neurometabolite levels in patients with schizophrenia undergoing long-term antipsychotic treatment: A proton magnetic resonance spectroscopy and reliability study.
Publication TypeJournal Article
Year of Publication2018
AuthorsPlitman E, Chavez S, Nakajima S, Iwata Y, Chung JKu, Caravaggio F, Kim J, Alshehri Y, M Chakravarty M, De Luca V, Remington G, Gerretsen P, Graff-Guerrero A
JournalPsychiatry Res Neuroimaging
Volume273
Pagination16-24
Date Published2018 Mar 30
ISSN1872-7506
Abstract

Previous proton magnetic resonance spectroscopy (H-MRS) studies have reported disrupted levels of various neurometabolites in patients with schizophrenia. An area of particular interest within this patient population is the striatum, which is highly implicated in the pathophysiology of schizophrenia. The present study examined neurometabolite levels in the striatum of 12 patients with schizophrenia receiving antipsychotic treatment for at least 1 year and 11 healthy controls using 3-Tesla H-MRS (PRESS, TE = 35 ms). Glutamate, glutamate+glutamine (Glx), myo-inositol, choline, N-acetylaspartate, and creatine levels were estimated using LCModel, and corrected for fraction of cerebrospinal fluid in the H-MRS voxel. Striatal neurometabolite levels were compared between groups. Multiple study visits permitted a reliability assessment for neurometabolite levels (days between paired H-MRS acquisitions: average = 90.33; range = 7-306). Striatal neurometabolite levels did not differ between groups. Within the whole sample, intraclass correlation coefficients for glutamate, Glx, myo-inositol, choline, and N-acetylaspartate were fair to excellent (0.576-0.847). The similarity in striatal neurometabolite levels between groups implies a marked difference from the antipsychotic-naïve first-episode state, especially in terms of glutamatergic neurometabolites, and might provide insight regarding illness progression and the influence of antipsychotic medication.

DOI10.1016/j.pscychresns.2018.01.004
Alternate JournalPsychiatry Res Neuroimaging
PubMed ID29414127

McGill Logo

CIUSSS ouest montreal logo

 



  • Douglas Hospital
  • Dobell Pavillion
  • Brain imaging centre