State-dependent microstructural white matter changes in drug-naïve patients with first-episode psychosis
| Autor: | Marcus V. Zanetti, Guray Erus, Geraldo F. Busatto, Jimit Doshi, Mauricio H. Serpa, Mikael Cavallet, Paulo C. Sallet, Christos Davatzikos, Tiffany M. Chaim-Avancini, M.T. van de Bilt, Wagner F. Gattaz |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Psychosis Adolescent White matter Young Adult 03 medical and health sciences 0302 clinical medicine Internal medicine Fasciculus Fractional anisotropy medicine Humans Longitudinal Studies Inferior longitudinal fasciculus Applied Psychology biology business.industry Remission Induction Middle Aged biology.organism_classification medicine.disease White Matter 030227 psychiatry Psychiatry and Mental health Drug-naïve Diffusion Tensor Imaging medicine.anatomical_structure Psychotic Disorders Schizophrenia Case-Control Studies Disease Progression Cardiology Female business 030217 neurology & neurosurgery Follow-Up Studies medicine.drug Diffusion MRI |
| Zdroj: | Psychological Medicine. 47:2613-2627 |
| ISSN: | 1469-8978 0033-2917 |
| Popis: | BackgroundDiffusion tensor imaging (DTI) studies have consistently shown white matter (WM) microstructural abnormalities in schizophrenia. Whether or not such alterations could vary depending on clinical status (i.e. acute psychosis v. remission) remains to be investigated.MethodsTwenty-five treatment-naïve first-episode psychosis (FEP) patients and 51 healthy-controls (HC) underwent MRI scanning at baseline. Twenty-one patients were re-scanned as soon as they achieved sustained remission of symptoms; 36 HC were also scanned twice. Rate-of-change maps of longitudinal DTI changes were calculated for in order to examine WM alterations associated with changes in clinical status. We conducted voxelwise analyses of fractional anisotropy (FA) and trace (TR) maps.ResultsAt baseline, FEP presented reductions of FA in comparison with HC [p < 0.05, false-discovery rate (FDR)-corrected] affecting fronto-limbic WM and associative, projective and commissural fasciculi. After symptom remission, patients showed FA increase over time (p < 0.001, uncorrected) in some of the above WM tracts, namely the right anterior thalamic radiation, right uncinate fasciculus/inferior fronto-occipital fasciculus, and left inferior fronto-occipital fasciculus/inferior longitudinal fasciculus. We also found significant correlations between reductions in PANSS scores and FA increases over time (p < 0.05, FDR-corrected).ConclusionsWM changes affecting brain tracts critical to the integration of perceptual information, cognition and emotions are detectable soon after the onset of FEP and may partially reverse in direct relation to the remission of acute psychotic symptoms. Our findings reinforce the view that WM abnormalities in brain tracts are a key neurobiological feature of acute psychotic disorders, and recovery from such WM pathology can lead to amelioration of symptoms. |
| Databáze: | OpenAIRE |
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