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- W2135655138 abstract "The glutamate system including N ‐methyl‐ d ‐aspartate (NMDA) affects synaptic formation, plasticity and maintenance. Recent studies have shown a variable (GT)n polymorphism in the promoter region of the NMDA subunit gene ( GRIN2A ) and a length‐dependent inhibition of transcriptional activity by the (GT)n repeat. In the present study, we examined whether the GRIN2A polymorphism is associated with regional brain volume especially in medial temporal lobe structures, in which the NMDA‐dependent synaptic processes have been most extensively studied. Gray matter regions of interest (ROIs) for the bilateral amygdala and hippocampus were outlined manually on the magnetic resonance images of 144 healthy individuals. In addition, voxel‐based morphometry (VBM) was conducted to explore the association of genotype with regional gray matter volume from everywhere in the brain in the same sample. The manually measured hippocampal and amygdala volumes were significantly larger in subjects with short allele carriers ( n = 89) than in those with homozygous long alleles ( n = 55) when individual differences in intracranial volume were accounted for. The VBM showed no significant association between the genotype and regional gray matter volume in any brain region. These findings suggest that the functional GRIN2A (GT)n polymorphism could weakly but significantly impact on human medial temporal lobe volume in a length‐dependent manner, providing in vivo evidence of the role of the NMDA receptor in human brain development." @default.
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- W2135655138 date "2010-04-01" @default.
- W2135655138 modified "2023-10-16" @default.
- W2135655138 title "Functional (GT)n polymorphisms in promoter region ofN-methyl-d-aspartate receptor 2A subunit (GRIN2A) gene affect hippocampal and amygdala volumes" @default.
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- W2135655138 doi "https://doi.org/10.1111/j.1601-183x.2009.00557.x" @default.
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