Abstract
Tardive dystonia is one of the most serious types of extrapyramidal symptoms that antipsychotics can cause. There is no established treatment to relieve this symptom, and its etiology is unclear. Recently, we identified very rare single-nucleotide polymorphisms (SNPs) on ZNF806 and SART3 by exome sequencing in three patients with profoundly severe tardive dystonia. Here, we conducted an association study (case, N = 16 vs. control, N = 96) on the rarest SNP selected from each gene. The results showed that rs2287546 on SART3 was not related to tardive dystonia and that rs4953961 on ZNF806 was a heterozygote in all the subjects, implying the absence of a rare SNP in this locus. We found three other genomic regions with high similarity to the relevant region on ZNF806 by BLAT searches. This strongly suggested a misalignment error in this region in our previous exome sequence. In conclusion, ZNF806 and SART3 are unlikely to be related to tardive dystonia.
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