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Published in: Brain Structure and Function 6/2018

Open Access 01-07-2018 | Original Article

Influence of the DRD2/ANKK1 Taq1A polymorphism on caudate volume in older adults without dementia

Authors: Xin Li, Goran Papenberg, Grégoria Kalpouzos, Lars Bäckman, Jonas Persson

Published in: Brain Structure and Function | Issue 6/2018

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Abstract

Dopaminergic neuromodulation is critically important for brain and cognitive integrity. The DRD2/ANKK1 Taq1A polymorphism is associated with striatal dopamine (DA) D2 receptor availability. Some previous studies have found that the A allele of the Taq1A polymorphism influences brain structure, but the results are inconsistent, likely due to population heterogeneity and small sample sizes. We investigated the genetic effect on caudate volume in a large sample of older adults without dementia. Results show that A-allele carriers have smaller caudate volume compared to non-carriers in relatively older adults (n = 167; Mage = 77.8 years), whereas the genotype did not influence caudate volume in a younger age group (n = 220; Mage = 62.8 years). Cognitive performance was not significantly affected by the DRD2 gene. Our findings extend previous observations by showing magnified genetic effects on brain volume in old age, and provide evidence for a link between a DA-related genetic polymorphism and grey matter volume in a brain region within the nigrostriatal dopaminergic pathway.
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Metadata
Title
Influence of the DRD2/ANKK1 Taq1A polymorphism on caudate volume in older adults without dementia
Authors
Xin Li
Goran Papenberg
Grégoria Kalpouzos
Lars Bäckman
Jonas Persson
Publication date
01-07-2018
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 6/2018
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-018-1650-0

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