UNIGE document Scientific Article
previous document  unige:97033  next document
add to browser collection
Title

Psychotic symptoms influence the development of anterior cingulate BOLD variability in 22q11.2 deletion syndrome

Authors
Published in Schizophrenia Research. 2018, vol. 193, p. 319-328
Abstract Chromosome 22q11.2 deletion syndrome (22q11DS) is a neurodevelopmental disorder associated with a broad phenotype of clinical, cognitive and psychiatric features. Due to the very high prevalence of schizophrenia (30-40%), the investigation of psychotic symptoms in the syndrome is promising to reveal biomarkers for the development of psychosis, also in the general population. Since schizophrenia is seen as a disorder of the dynamic interactions between brain networks, we here investigated brain dynamics, assessed by the variability of blood oxygenation level dependent (BOLD) signals, in patients with psychotic symptoms. We included 28 patients with 22q11DS presenting higher positive psychotic symptoms, 29 patients with lower positive psychotic symptoms and 69 healthy controls between 10 and 30years old. To overcome limitations of mass-univariate approaches, we employed multivariate analysis, namely partial least squares correlation, combined with proper statistical testing, to analyze resting-state BOLD signal variability and its age-relationship in patients with positive psychotic symptoms. Our results revealed a missing positive age-relationship in the dorsal anterior cingulate cortex (dACC) in patients with higher positive psychotic symptoms, leading to globally lower variability in the dACC in those patients. Patients without positive psychotic symptoms and healthy controls had the same developmental trajectory in this region. Alterations of brain structure and function in the ACC have been previously reported in 22q11DS and linked to psychotic symptoms. The present results support the implication of this region in the development of psychotic symptoms and suggest aberrant BOLD signal variability development as a potential biomarker for psychosis.
Keywords BOLD signal variabilityPsychotic symptoms22q11.2 deletion syndromeSalience network
Identifiers
PMID: 28803847
Full text
Article (Published version) (2.3 MB) - document accessible for UNIGE members only Limited access to UNIGE
Article (Accepted version) (5.8 MB) - public document Free access
Supplemental data (289 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Research groups Laboratoire d'imagerie et de psychopathologie développementale (693)
Traitement d'images médicales (893)
NCCR Synapsy
Projects FNS: 32473B_121996 and 234730_144260
FNS: 51AU40_125759 and 51NF40_158776
FNS: 145250
FNS: 163859
Citation
(ISO format)
ZOELLER, Daniela et al. Psychotic symptoms influence the development of anterior cingulate BOLD variability in 22q11.2 deletion syndrome. In: Schizophrenia Research, 2018, vol. 193, p. 319-328. doi: 10.1016/j.schres.2017.08.003 https://archive-ouverte.unige.ch/unige:97033

297 hits

24 downloads

Update

Deposited on : 2017-09-26

Export document
Format :
Citation style :