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. 2010 Feb 1;67(3):279-82.
doi: 10.1016/j.biopsych.2009.08.036. Epub 2009 Oct 28.

Genomewide association study of movement-related adverse antipsychotic effects

Karolina Aberg  1 , Daniel E Adkins, József Bukszár, Bradley T Webb, Stanley N Caroff, Del D Miller, Jonathan Sebat, Scott Stroup, Ayman H Fanous, Vladimir I Vladimirov, Joseph L McClay, Jeffrey A Lieberman, Patrick F Sullivan, Edwin J C G van den Oord
Affiliations

Genomewide association study of movement-related adverse antipsychotic effects

Karolina Aberg et al. Biol Psychiatry. .

Abstract

Background: Understanding individual differences in the development of extrapyramidal side effects (EPS) as a response to antipsychotic therapy is essential to individualize treatment.

Methods: We performed genomewide association studies to search for genetic susceptibility to EPS. Our sample consisted of 738 schizophrenia patients, genotyped for 492K single nucleotide polymorphisms (SNPs). We studied three quantitative measures of antipsychotic adverse drug reactions-the Simpson-Angus Scale (SAS) for Parkinsonism, the Barnes Akathisia Rating Scale, and the Abnormal Involuntary Movement Scale (AIMS)-as well as a clinical diagnosis of probable tardive dyskinesia.

Results: Two SNPs for SAS, rs17022444 and rs2126709 with p = 1.2 x 10(-10) and p = 3.8 x 10(-7), respectively, and one for AIMS, rs7669317 with p = 7.7 x 10(-8), reached genomewide significance (Q value < .1). rs17022444 and rs7669317 were located in intergenic regions and rs2126709 was located in ZNF202 on 11q24. Fourteen additional signals were potentially interesting (Q value < .5). The ZNF202 is a transcriptional repressor controlling, among other genes, PLP1, which is the major protein in myelin. Mutations in PLP1 cause Pelizaeus-Merzbacher disease, which has Parkinsonism as an occurring symptom. Altered mRNA expression of PLP1 is associated with schizophrenia.

Conclusions: Although our findings require replication and validation, this study demonstrates the potential of genomewide association studies to discover genes and pathways that mediate adverse effects of antipsychotics.

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