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Abstract #5030

White Matter Microstructure Alterations and Their Link to Symptomatology in Early Psychosis and Schizophrenia

Tommaso Pavan1,2, Yasser Alemán-Gómez1,2, Pascal Steullet1, Zoe Schilliger1,3, Daniella Dwir1, Raoul Jenni1,3, Martine Cleusix1, Luis Alameda1,3, Kim Q. Do1,3, Philippe Conus1, Paul Klauser1,3, Patric Hagmann1, and Ileana Jelescu1
1Lausanne University Hospital (CHUV), Lausanne, Switzerland, 2University of Lausanne, Lausanne, Switzerland, 3University of Lausanne (UNIL), Lausanne, Switzerland

Synopsis

Keywords: Psychiatric Disorders, White Matter, Neuroinflammation, DKI, DTI, DWI, Psychosis

Motivation: Schizophrenia features complex symptomatology. Increased dMRI measures specificity is the key to capture the relation of white matter microstructure alterations with patients psychopathology.

Goal(s): We aim to better characterize WM pathology and, thus, understand its relation with the symptomatology of early-psychosis and schizophrenia.

Approach: Diffusion Kurtosis Imaging and White Matter Tract Integrity–Watson were estimated in 275 individuals. Whole-brain WM estimates were compared between patients and controls, and associated with patients psychopathology.

Results: dMRI patterns suggest that WM alterations are already present and widespread in EP. Two trends of WM deterioration with concomitant demyelination vs neuroinflammation were found associated with clinical scales regression analysis.

Impact: Our findings possibly provide a missing link between specific symptoms and underlying pathology. The association between patients' psychopathology and advanced dMRI metrics may spark further interest in linking specific symptom in psychiatry diseases to microstructure alterations.

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Keywords