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Multicenter Study
. 2014 Dec 28;18(6):pyu098.
doi: 10.1093/ijnp/pyu098.

Association study indicates a protective role of phosphatidylinositol-4-phosphate-5-kinase against tardive dyskinesia

Affiliations
Multicenter Study

Association study indicates a protective role of phosphatidylinositol-4-phosphate-5-kinase against tardive dyskinesia

Olga Yu Fedorenko et al. Int J Neuropsychopharmacol. .

Abstract

Background: Tardive dyskinesia is a disorder characterized by involuntary muscle movements that occur as a complication of long-term treatment with antipsychotic drugs. It has been suggested to be related to a malfunctioning of the indirect pathway of the motor part of the cortical-striatal-thalamic-cortical circuit, which may be caused by oxidative stress-induced neurotoxicity.

Methods: The purpose of our study was to investigate the possible association between phosphatidylinositol-4-phosphate-5-kinase type IIa (PIP5K2A) function and tardive dyskinesia in 491 Caucasian patients with schizophrenia from 3 different psychiatric institutes in West Siberia. The Abnormal Involuntary Movement Scale was used to assess tardive dyskinesia. Individuals were genotyped for 3 single nucleotide polymorphisms in PIP5K2A gene: rs10828317, rs746203, and rs8341.

Results: A significant association was established between the functional mutation N251S-polymorphism of the PIP5K2A gene (rs10828317) and tardive dyskinesia, while the other 2 examined nonfunctional single nucleotide polymorphisms were not related.

Conclusions: We conclude from this association that PIP5K2A is possibly involved in a mechanism protecting against tardive dyskinesia-inducing neurotoxicity. This corresponds to our hypothesis that tardive dyskinesia is related to neurotoxicity at striatal indirect pathway medium-sized spiny neurons.

Keywords: PIP5K2A; gene polymorphism; medium spiny neurons; neurotoxicity; schizophrenia; tardive dyskinesia.

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Figures

Figure 1.
Figure 1.
The cortical-striatal-thalamic-cortical circuits, including the indirect and direct pathways. Activation of the direct pathway causes hyperkinesia and activation of the indirect pathway causes hypokinesia. ENK, enkephalin; GPe, globus pallidus, external segment; GPi, globus pallidus, internal segment; SNc, substantia nigra, pars compacta; SNr, substantia nigra, pars reticulata; SP/DYN, substance P/dynorphin; STh, subthalamic nucleus; D1, D2, medium-sized spiny neurons (MSNs) with D1 or D2 receptors. Red, excitatory (glutamatergic, dopaminergic); blue, inhibitory (GABAergic, dopaminergic).
Figure 2.
Figure 2.
Representation of the single nucleotide polymorphism positions of 3 studied polymorphisms of the PIP5K2A gene (He et al., 2007).

References

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