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- Title
Effects of the BDNF Val<sup>66</sup>Met Polymorphism on White Matter Microstructure in Healthy Adults.
- Authors
Tost, Heike; Alam, Tajvar; Geramita, Matthew; Rebsch, Christine; Kolachana, Bhaskar; Dickinson, Dwight; Verchinski, Beth A; Lemaitre, Herve; Barnett, Alan S; Trampush, Joey W; Weinberger, Daniel R; Marenco, Stefano
- Abstract
The BDNF Val66Met polymorphism, a possible risk variant for mental disorders, is a potent modulator of neural plasticity in humans and has been linked to deficits in gray matter structure, function, and cognition. The impact of the variant on brain white matter structure, however, is controversial and remains poorly understood. Here, we used diffusion tensor imaging to examine the effects of BDNF Val66Met genotype on white matter microstructure in a sample of 85 healthy Caucasian adults. We demonstrate decreases of fractional anisotropy and widespread increases in radial diffusivity in Val/Val homozygotes compared with Met-allele carriers, particularly in prefrontal and occipital pathways. These data provide an independent confirmation of prior imaging genetics work, are consistent with complex effects of the BDNF Val66Met polymorphism on human brain structure, and may serve to generate hypotheses about variation in white matter microstructure in mental disorders associated with this variant.
- Subjects
BRAIN-derived neurotrophic factor; GENETIC polymorphism research; NEUROPLASTICITY; DIFFUSION tensor imaging; ANISOTROPY; ALLELES; CAUCASIAN race
- Publication
Neuropsychopharmacology, 2013, Vol 38, Issue 3, p525
- ISSN
0893-133X
- Publication type
Article
- DOI
10.1038/npp.2012.214