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Association between glutamate transporter gene polymorphisms and obsessive-compulsive disorder/trait empathy in a Korean population

 Hae Won Kim  ;  Jee In Kang  ;  Eun Hee Hwang  ;  Se Joo Kim 
 PLoS One, Vol.13(1) : e0190593, 2018 
Journal Title
 PLoS One 
Issue Date
Adult ; *Empathy ; Excitatory Amino Acid Transporter 3/*genetics ; Female ; Humans ; Male ; Obsessive-Compulsive Disorder/*genetics ; Single Nucleotide *Polymorphism ; Republic of Korea ; Young Adult
Accumulating evidence suggests that the glutamatergic system plays a major role in the pathophysiology of obsessive compulsive disorder (OCD) and empathic processing. Particularly, genetic influence of glutamate transporter gene (SLC1A1) on OCD has been frequently replicated in previous studies, but several studies did not replicate the result. Therefore, we aimed to replicate the associations between the SLC1A1 and OCD in a Korean population. In addition, we investigated the influence of SLC1A1 on trait empathy, impairments in which are characteristic of OCD. Six single-nucleotide polymorphisms (SNP) of SLC1A1 were genotyped in 615 patients with OCD and 508 healthy controls. The interpersonal reactivity index (IRI)-which consists of four subscales (perspective taking, PT; fantasy seeking, FS; empathic concern, EC; personal distress, PD)-was assessed from 277 patients with OCD and 395 controls. There were no significant associations between OCD and SNPs or haplotypes of SLC1A1. Patients with OCD exhibited significantly lower PT and higher PD scores than controls. The C-T-G haplotype at rs301430-rs301434-rs3087879 of SLC1A1 was significantly associated with higher PD scores after adjusted for age, sex, and OCD status. Our results suggest that six common SNPs of SLC1A1 may not contribute to the development of OCD, but may contribute to certain aspect of trait empathy such as personal distress. However, insufficient sample size and limited number of SLC1A1 SNPs may have reduced the likelihood of detecting significant associations. Therefore, further studies with larger sample size and more tag SNPs of the SLC1A1 gene were warranted.
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1. College of Medicine (의과대학) > Dept. of Psychiatry (정신과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Medical Education (의학교육학과) > 1. Journal Papers
Yonsei Authors
Kang, Jee In(강지인) ORCID logo https://orcid.org/0000-0002-2818-7183
Kim, Se Joo(김세주) ORCID logo https://orcid.org/0000-0002-5438-8210
Kim, Hae Won(김혜원) ORCID logo https://orcid.org/0000-0002-9321-8361
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