Background: Pharmacogenetics of tardive dyskinesia and dopamine D3 (DRD3), serotonin 2A (HTR2A), and 2C (HTR2C) receptors has been examined in various populations, but not in Russians. Purpose: To investigate the association between orofaciolingual (TDof) and limb-truncal dyskinesias (TDlt) and Ser9Gly (DRD3), -1438G>A (HTR2A), and Cys23Ser (HTR2C) polymorphisms in Russian psychiatric inpatients from Tomsk, Siberia. Methods: In total, 146 subjects were included. Standard protocols were applied for genotyping. TDof and TDlt were assessed with AIMS items 1-4 and 5-7, respectively. Two-part model, logistic and log-normal regression analyses were applied to assess different variables (e.g., allele-carriership status, age, gender, and medication use). Results: TDlt, but not TDof, exhibited an association with Ser9Gly and Cys23Ser (with 9Gly and 23Ser alleles exhibiting opposite effects). However, -1438G>A was not associated with TDof and Dlt. Conclusions: This is the first pharmacogenetic report on tardive dyskinesia in Russians. Subject to further replication, our findings extend and support the available data.

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Keywords DRD3, Extrapyramidal syndromes, HTR2A, HTR2C, Pharmacogenetics, Tardive dyskinesia
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Journal Progress in Neuro-Psychopharmacology & Biological Psychiatry
Al Hadithy, A.F.Y, Ivanova, S.A, Pechlivanoglu, P, Semke, A, Fedorenko, O, Kornetova, E, … Loonen, A.J.M. (2009). Tardive dyskinesia and DRD3, HTR2A and HTR2C gene polymorphisms in Russian psychiatric inpatients from Siberia. Progress in Neuro-Psychopharmacology & Biological Psychiatry, 33(3), 475–481. doi:10.1016/j.pnpbp.2009.01.010