A DRD2/ANNK1 -COMT Interaction, Consisting of Functional Variants, Confers Risk of Post-traumatic Stress Disorder in Traumatized Chinese

Frontiers in Psychiatry
Kunlin ZhangIsrael Liberzon

Abstract

Objective: Post-traumatic stress disorder (PTSD) is a trauma- and stress-related psychiatric syndrome that occurs after exposure to extraordinary stressors. The neurotransmitter dopamine (DA) plays important roles in neurobiological processes like reward and stress, and a link between PTSD and the dopaminergic system has been reported. Thus, the investigation of an association between PTSD and gene-gene interaction (epistasis) within dopaminergic genes could uncover the genetic basis of dopamine-related PTSD symptomatology and contribute to precision medicine. Methods: We genotyped seven single nucleotide polymorphisms (SNPs) of three dopaminergic genes DRD2/ANNK1 (rs1800497 and rs1801028), COMT (rs6269, rs4633, rs4818 and rs4680) and DBH (rs1611115), in a Chinese predominantly adult cohort that had been exposed to an earthquake (156 PTSD cases and 978 controls). Results: Statistical genetics analysis identified a DRD2/ANNK1-COMT interaction (rs1800497 × rs6269), which is associated with PTSD diagnosis (Pinteraction = 0.0008055 and Pcorrected = 0.0169155). Single-variant and haplotype-based subset analyses showed that rs1800497 modulates the association directions of both the rs6269 G allele and the rs6269-rs4633-rs4818-rs4680 ...Continue Reading

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Citations

Feb 7, 2019·Behavioural Pharmacology·Simona CabibStefano Puglisi Allegra
Dec 24, 2019·Cranio : the Journal of Craniomandibular Practice·Rafaela ScariotJoão Cesar Zielak
Nov 11, 2020·International Journal of Environmental Research and Public Health·Yu JiangJiwen Liu

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Methods Mentioned

BETA
genotyping
PCR

Software Mentioned

R
Haploview
PLINK
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