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Common and distinct structural features of schizophrenia and bipolar disorder: The European Network on Psychosis, Affective disorders and Cognitive Trajectory (ENPACT) study

Abstract: INTRODUCTION: Although schizophrenia (SCZ) and bipolar disorder (BD) share elements of pathology, their neural underpinnings are still under investigation. Here, structural Magnetic Resonance Imaging (MRI) data collected from a large sample of BD and SCZ patients and healthy controls (HC) were analyzed in terms of gray matter volume (GMV) using both voxel based morphometry (VBM) and a region of interest (ROI) approach. METHODS: The analysis was conducted on two datasets, Dataset1 (802 subjects: 243 SCZ, 176 BD, 383 HC) and Dataset2, a homogeneous subset of Dataset1 (301 subjects: 107 HC, 85 BD and 109 SCZ). General Linear Model analyses were performed 1) at the voxel-level in the whole brain (VBM study), 2) at the regional level in the anatomical regions emerged from the VBM study (ROI study). The GMV comparison across groups was integrated with the analysis of GMV correlates of different clinical dimensions. RESULTS: The VBM results of Dataset1 showed 1) in BD compared to HC, GMV deficits in right cingulate, superior temporal and calcarine cortices, 2) in SCZ compared to HC, GMV deficits in widespread cortical and subcortical areas, 3) in SCZ compared to BD, GMV deficits in insula and thalamus (p<0.05, cluster family wise error corrected). The regions showing GMV deficits in the BD group were mostly included in the SCZ ones. The ROI analyses confirmed the VBM results at the regional level in most of the clusters from the SCZ vs. HC comparison (p<0.05, Bonferroni corrected). The VBM and ROI analyses of Dataset2 provided further evidence for the enhanced GMV deficits characterizing SCZ. Based on the clinical-neuroanatomical analyses, we cannot exclude possible confounding effects due to 1) age of onset and medication in BD patients, 2) symptoms severity in SCZ patients. CONCLUSION: Our study reported both shared and specific neuroanatomical characteristics between the two disorders, suggesting more severe and generalized GMV deficits in SCZ, with a specific role for insula and thalamus.

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 Fuente: PLoS One. 2017 Nov 14;12(11):e0188000

Editorial: Public Library of Science

 Año de publicación: 2017

Nº de páginas: 22

Tipo de publicación: Artículo de Revista

 DOI: 10.1371/journal.pone.0188000

ISSN: 1932-6203

Url de la publicación: https://dx.doi.org/10.1371/journal.pone.0188000

Autores/as

MAGGIONI, ELEONORA

NENADIC, IGOR

BENEDETTI, FRANCESCO

GASER, CHRISTIAN

SAUER, HEINRICH

ROBERTO ROIZ SANTIAÑEZ

POLETTI, SARA

MARINELLI, VERONICA

BELLANI, MARCELLA

PERLINI, CINZIA

RUGGERI, MIRELLA

ALTAMURA, A. CARLO

DIWADKAR, VAIBHAV A.

BRAMBILLA, PAOLO

ENPACT GROUP