Genes of the Glutamatergic System and Tardive Dyskinesia in Patients with Schizophrenia

oleh: Olga Yu. Fedorenko, Diana Z. Paderina, Elena G. Kornetova, Evgeniya G. Poltavskaya, Ivan V. Pozhidaev, Anastasiia A. Goncharova, Maxim B. Freidin, Anna V. Bocharova, Nikolay A. Bokhan, Anton J. M. Loonen, Svetlana A. Ivanova

Format: Article
Diterbitkan: MDPI AG 2022-06-01

Deskripsi

Background: Tardive dyskinesia (TD) is an extrapyramidal side effect of the long-term use of antipsychotics. In the present study, the role of glutamatergic system genes in the pathogenesis of total TD, as well as two phenotypic forms, orofacial TD and limb-truncal TD, was studied. Methods: A set of 46 SNPs of the glutamatergic system genes (<i>GRIN2A</i>, <i>GRIN2B</i>, <i>GRIK4</i>, <i>GRM3</i>, <i>GRM7</i>, <i>GRM8</i>, <i>SLC1A2</i>, <i>SLC1A3</i>, <i>SLC17A7</i>) was studied in a population of 704 Caucasian patients with schizophrenia. Genotyping was performed using the MassARRAY Analyzer 4 (Agena Bioscienceā„¢). Logistic regression analysis was performed to test for the association of TD with the SNPs while adjusting for confounders. Results: No statistically significant associations between the SNPs and TD were found after adjusting for multiple testing. Since three SNPs of the <i>SLC1A2</i> gene demonstrated nominally significant associations, we carried out a haplotype analysis for these SNPs. This analysis identified a risk haplotype for TD comprising CAT alleles of the <i>SLC1A2</i> gene SNPs rs1042113, rs10768121, and rs12361171. Nominally significant associations were identified for <i>SLC1A3</i> rs2229894 and orofacial TD, as well as for <i>GRIN2A</i> rs7192557 and limb-truncal TD. Conclusions: Genes encoding for mGlu3, EAAT2, and EAAT1 may be involved in the development of TD in schizophrenia patients.