Abnormalities in brain white matter in adolescents with 22q11.2 deletion syndrome and psychotic symptoms |
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| Authors: | Zora Kikinis Kang Ik K Cho Ioana L Coman Petya D Radoeva Sylvain Bouix Yingying Tang Ryan Eckbo Nikos Makris Jun Soo Kwon Marek Kubicki Kevin M Antshel Wanda Fremont Martha E Shenton Wendy R Kates |
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| Institution: | 1.Psychiatry Neuroimaging Laboratory, Department of Psychiatry,Brigham and Women’s Hospital, Harvard Medical School,Boston,USA;2.Brain and Cognitive Sciences, Department of Natural Sciences,Seoul National University,Seoul,South Korea;3.Department of Psychiatry and Behavioral Sciences,SUNY Upstate Medical University,Syracuse,USA;4.Department of EEG and Imaging, Shanghai Mental Health Center,Shanghai Jiao Tong University School of Medicine,Shanghai,China;5.Psychiatry and Neurology Departments, Massachusetts General Hospital,Harvard Medical School,Boston,USA;6.Department of Psychiatry,Seoul National University College of Medicine,Seoul,Republic of Korea;7.Department of Radiology, Brigham and Women’s Hospital,Harvard Medical School,Boston,USA;8.Department of Psychology,Syracuse University,Syracuse,USA;9.VA Boston Healthcare System,Harvard Medical School,Brockton,USA |
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| Abstract: | Background22q11.2 Deletion Syndrome (22q11DS) is considered to be a promising cohort to explore biomarkers of schizophrenia risk based on a 30 % probability of developing schizophrenia in adulthood. In this study, we investigated abnormalities in the microstructure of white matter in adolescents with 22q11DS and their specificity to prodromal symptoms of schizophrenia.MethodsDiffusion Magnetic Resonance Imaging (dMRI) data were acquired from 50 subjects with 22q11DS (9 with and 41 without prodromal psychotic symptoms), and 47 matched healthy controls (mean age 18 +/?2 years). DMRI measures, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were calculated and compared between groups using the Tract Based Spatial Statistics (TBSS) method. Additionally, correlations between dMRI measures and scores on positive symptoms were performed.ResultsReductions in MD, AD and RD (but not FA) were found in the corpus callosum (CC), left and right superior longitudinal fasciculus (SLF), and left and right corona radiata in the entire 22q11DS group. In addition, the 22q11DS subgroup with prodromal symptoms showed reductions in AD and MD, but no changes in RD when compared to the non-prodromal subgroup, in CC, right SLF, right corona radiata and right internal capsule. Finally, AD values in these tracts correlated with the scores on the psychosis subscale.ConclusionMicrostructural abnormalities in brain white matter are present in adolescent subjects with prodromal psychotic symptoms. |
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