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The Dopamine D3 Receptor Gene and Posttraumatic Stress Disorder

Citation

Wolf, Erika J.; Mitchell, Karen S.; Logue, Mark W.; Baldwin, Clinton T.; Reardon, Annemarie F.; Aiello, Allison E.; Galea, Sandro; Koenen, Karestan C.; Uddin, Monica; & Wildman, Derek E., et al. (2014). The Dopamine D3 Receptor Gene and Posttraumatic Stress Disorder. Journal of Traumatic Stress, 27(4), 379-387. PMCID: PMC4147673

Abstract

The dopamine D3 receptor (DRD3) gene has been implicated in schizophrenia, autism, and substance use-disorders and is related to emotion reactivity, executive functioning, and stress-responding, processes impaired in posttraumatic stress disorder (PTSD). The aim of this candidate gene study was to evaluate DRD3 polymorphisms for association with PTSD. The discovery sample was trauma-exposed White, non-Hispanic U.S. veterans and their trauma-exposed intimate partners (N = 491); 60.3% met criteria for lifetime PTSD. The replication sample was 601 trauma-exposed African American participants living in Detroit, Michigan; 23.6% met criteria for lifetime PTSD. Genotyping was based on high-density bead chips. In the discovery sample, 4 single nucleotide polymorphisms (SNPs), rs2134655, rs201252087, rs4646996, and rs9868039, showed evidence of association with PTSD and withstood correction for multiple testing. The minor alleles were associated with reduced risk for PTSD (OR range = 0.59 to 0.69). In the replication sample, rs2251177, located 149 base pairs away from the most significant SNP in the discovery sample, was nominally associated with PTSD in men (OR = 0.32). Although the precise role of the D3 receptor in PTSD is not yet known, its role in executive functioning and emotional reactivity, and the sensitivity of the dopamine system to environmental stressors could potentially explain this association.

URL

http://dx.doi.org/10.1002/jts.21937

Reference Type

Journal Article

Year Published

2014

Journal Title

Journal of Traumatic Stress

Author(s)

Wolf, Erika J.
Mitchell, Karen S.
Logue, Mark W.
Baldwin, Clinton T.
Reardon, Annemarie F.
Aiello, Allison E.
Galea, Sandro
Koenen, Karestan C.
Uddin, Monica
Wildman, Derek E.
Miller, Mark W.

PMCID

PMC4147673