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Association Between the SLC1A1 Glutamate Transporter Gene and Obsessive-Compulsive Disorder in the Chinese Han Population

Authors Huang X, Liu J, Cong J, Zhang X

Received 24 September 2020

Accepted for publication 7 January 2021

Published 5 February 2021 Volume 2021:17 Pages 347—354


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Taro Kishi

Xing Huang,1 Jie Liu,2 Jinzhi Cong,3 Xinhua Zhang1

1Department of Psychology and Psychiatry, Medical College, Qingdao University, Qingdao, People’s Republic of China; 2Department of Psychiatry, Qingdao Mental Health Center, Qingdao, People’s Republic of China; 3Health Convergence Media Communication Division, Shandong Health Publicity and Education Center, Jinan, People’s Republic of China

Correspondence: Xinhua Zhang
Department of Psychology and Psychiatry, Medical College, Qingdao University, 38 Dengzhou Road, Qingdao, 266021, People’s Republic of China
Tel +86 532 8279 0547
Fax +86 532 8291 1385

Background: Obsessive-compulsive disorder (OCD) is a common, serious and genetically related mental illness; the etiology of OCD has not yet reached a definitive conclusion. Multiple evidence suggests that the glutamatergic system plays a major role in the pathophysiology of OCD. However, subsequent studies on the glutamate transporter gene are not consistent. OCD is a heterogeneous disease. To resolve the complex genetic basis of OCD, division the disorder into different subphenotypes is an effective method for studying the pathogenesis of OCD.
Methods: We recruited 438 OCD patients and 465 age- and sex-matched controls from a Chinese Han population. rs10491734, rs3780412, rs301434 and rs3087879 SNPs were genotyped by real-time TaqMan polymerase chain reaction, and the chi-squared test was used to compare allele and genotype frequencies of variants between the two groups.
Results: The genotype of rs301434 was statistically significant in total patients with OCD and the controls. After grouping by age and gender, the genotype of rs301434 was statistically significant in early-onset OCD, late-onset OCD as well as male OCD, the allele and genotype of rs3780412 was associated with late-onset OCD. Haplotype analysis showed that four loci haplotypes (G-A-A-G and G-G-A-G) were associated with total OCD, (G-G-A-G) was associated with female OCD, (G-A-G-G) was associated with male OCD, (G-A-A-G and G-G-A-G) were associated with late-onset OCD.
Conclusion: This study provides suggestive evidence that SLC1A1 may be involved in the development of OCD in the Han population. However, these findings require further replication.

Keywords: obsessive-compulsive disorder, glutamate transporter gene, haplotype

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