The Neuronal Transporter Gene SLC6A15 Confers Risk to Major Depression

MA Kohli, S Lucae, PG Saemann, MV Schmidt, Ayse Demirkan, Karin Hek, D Czamara, M Alexander, D Salyakina, S Ripke, D Hoehn, M Specht, A Menke, J Hennings, A Heck, C Wolf, M Ising, S Schreiber, M Czisch, MB MullerM Uhr, T Bettecken, A Becker, J Schramm, M Rietschel, W Maier, B Bradley, KJ Ressler, MM Nothen, S Cichon, IW Craig, G Breen, CM Lewis, Bert Hofman, Henning Tiemeier, Cornelia Duijn, F Holsboer, B Muller-Myhsok, EB Binder

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Abstract

Major depression (MD) is one of the most prevalent psychiatric disorders and a leading cause of loss in work productivity. A combination of genetic and environmental risk factors probably contributes to MD. We present data from a genome-wide association study revealing a neuron-specific neutral amino acid transporter (SLC6A15) as a susceptibility gene for MD. Risk allele carrier status in humans and chronic stress in mice were associated with a down-regulation of the expression of this gene in the hippocampus, a brain region implicated in the pathophysiology of MD. The same polymorphisms also showed associations with alterations in hippocampal volume and neuronal integrity. Thus, decreased SLC6A15 expression, due to genetic or environmental factors, might alter neuronal circuits related to the susceptibility for MD. Our convergent data from human genetics, expression studies, brain imaging, and animal models suggest a pathophysiological mechanism for MD that may be accessible to drug targeting.
Original languageUndefined/Unknown
Pages (from-to)252-265
Number of pages14
JournalNeuron
Volume70
Issue number2
DOIs
Publication statusPublished - 2011

Research programs

  • EMC NIHES-01-64-01
  • EMC NIHES-01-64-02
  • EMC OR-01-58-01

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