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Association Between Glutathione Peroxidase-1 (GPx-1) Polymorphisms and Schizophrenia in the Chinese Han Population

Authors Shao X, Yan C, Sun D, Fu C, Tian C, Duan L, Zhu G

Received 15 July 2020

Accepted for publication 7 September 2020

Published 6 October 2020 Volume 2020:16 Pages 2297—2305


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Dr Yuping Ning

Xiaojun Shao1 *,* Ci Yan1 *,* Dongxue Sun,1 Chunfeng Fu,1 Chunsheng Tian,1 Li Duan,1 Gang Zhu1,2

1Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, People’s Republic of China; 2Central Laboratory, The First Affiliated Hospital of China Medical University, Shenyang 110001, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Gang Zhu
Department of Psychiatry, Tthe First Affiliated Hospital of China Medical University, Shenyang 110001, People’s Republic of China
Tel/ Fax +86-24-83282184
Email [email protected]

Objective: The dopamine and oxidative stress hypotheses are leading theories of the pathoetiology of schizophrenia (SCZ). Glutathione Peroxidase 1 (GPx-1), a major antioxidant enzyme, and the most abundantly expressed member of the GPx family, plays an important role in metabolic dopamine changes, which are closely related to neurological and psychiatric disorders. The impact of GPx-1 polymorphisms has rarely been explored in the field of SCZ. Here, we explored the possible relationship between GPx-1 gene polymorphisms and SCZ in Chinese Han subjects by using the polymerase chain reaction-restriction fragment length polymorphism method.
Methods: DNA from 786 patients (360 patients with schizophrenia and 426 healthy controls) was genotyped for the single-nucleotide polymorphisms rs1800668 C/T and rs1050450 C/T in GPx-1 using polymerase chain reaction-restriction fragment length polymorphism analysis. Analysis of the association between GPx-1 and SCZ was performed using SPSS 22.0, while Haploview 4.2 software and SHEsis software were used to perform linkage disequilibrium analysis and haplotype analysis.
Results: The results indicated that the GPx-1 polymorphisms rs1050450 and rs1800668 were associated with SCZ. We found that the C-allele of rs1800668 C/T may be a protection factor against SCZ in general, but in particular, for males. Furthermore, the CT and TC (GPx-1 rs1800668 C/T and rs1050450 C/T) haplotypes may be susceptible to SCZ in the population. Finally, no significant differences in allelic or genotypic frequencies of rs1050450 were detected between cases and controls from whole or stratification analyses by gender.
Conclusion: GPx-1 polymorphisms are related to SCZ in Chinese Han subjects. Our results suggested that GPx-1 may be a potential gene that influences SCZ.

Keywords: case-control study, Chinese Han population, GPx1, polymorphism, schizophrenia

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