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Effect of childhood maltreatment and brain-derived neurotrophic factor on brain morphology
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Journal Article
Effect of childhood maltreatment and brain-derived neurotrophic factor on brain morphology
2016
Overview
Childhood maltreatment (CM) has been associated with altered brain morphology, which may partly be due to a direct impact on neural growth, e.g. through the brain-derived neurotrophic factor (BDNF) pathway. Findings on CM, BDNF and brain volume are inconsistent and have never accounted for the entire BDNF pathway. We examined the effects of CM, BDNF (genotype, gene expression and protein level) and their interactions on hippocampus, amygdala and anterior cingulate cortex (ACC) morphology. Data were collected from patients with depression and/or an anxiety disorder and healthy subjects within the Netherlands Study of Depression and Anxiety (NESDA) (
N
= 289). CM was assessed using the Childhood Trauma Interview. BDNF Val66Met genotype, gene expression and serum protein levels were determined in blood and T1 MRI scans were acquired at 3T. Regional brain morphology was assessed using FreeSurfer. Covariate-adjusted linear regression analyses were performed. Amygdala volume was lower in maltreated individuals. This was more pronounced in maltreated met-allele carriers. The expected positive relationship between BDNF gene expression and volume of the amygdala is attenuated in maltreated subjects. Finally, decreased cortical thickness of the ACC was identified in maltreated subjects with the val/val genotype. CM was associated with altered brain morphology, partly in interaction with multiple levels of the BNDF pathway. Our results suggest that CM has different effects on brain morphology in met-carriers and val-homozygotes and that CM may disrupt the neuroprotective effect of BDNF.
Publisher
Oxford University Press
Subject
/ Alleles
/ Anxiety Disorders - genetics
/ Anxiety Disorders - physiopathology
/ Anxiety Disorders - psychology
/ Brain-derived neurotrophic factor
/ Brain-Derived Neurotrophic Factor - genetics
/ Brain-Derived Neurotrophic Factor - physiology
/ Cerebral Cortex - physiopathology
/ Child
/ Depressive Disorder - genetics
/ Depressive Disorder - physiopathology
/ Depressive Disorder - psychology
/ Female
/ Gene Expression Regulation - genetics
/ Genotype
/ Gyrus Cinguli - physiopathology
/ Hippocampus - physiopathology
/ Humans
/ Image Processing, Computer-Assisted
/ Magnetic Resonance Imaging - methods
/ Male
/ Neural Pathways - physiopathology
/ Original
