Genotype and ancestry modulate brain's DAT availability in healthy humans.

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ID: 47392
2011
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Abstract
The dopamine transporter (DAT) is a principal regulator of dopaminergic neurotransmission and its gene (the SLC6A3) is a strong biological candidate gene for various behavioral- and neurological disorders. Intense investigation of the link between the SLC6A3 polymorphisms and behavioral phenotypes yielded inconsistent and even contradictory results. Reliance on objective brain phenotype measures, for example, those afforded by brain imaging, might critically improve detection of DAT genotype-phenotype association. Here, we tested the relationship between the DAT brain availability and the SLC6A3 genotypes using an aggregate sample of 95 healthy participants of several imaging studies. These studies employed positron emission tomography (PET) with [¹¹C]cocaine wherein the DAT availability was estimated as Bmax/Kd; while the genotype values were obtained on two repeat polymorphisms--3-UTR- and intron 8--VNTRs. The main findings are the following: 1) both polymorphisms analyzed as single genetic markers and in combination (haplotype) modulate DAT density in midbrain; 2) ethnic background and age influence the strength of these associations; and 3) age-related changes in DAT availability differ in the 3-UTR and intron 8--genotype groups.
Reference Key
shumay2011genotypeplos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Shumay, Elena;Chen, John;Fowler, Joanna S;Volkow, Nora D;
Journal PloS one
Year 2011
DOI
DOI not found
URL
http://europepmc.org/articles/PMC3149615?pdf=render
Keywords
Biology (General) Medicine Science genetics

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