The Relationship between the SNAP-25 Polymorphism and Omission Errors in Korean Children with Attention Deficit Hyperactivity Disorder

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Authors: Eunjoo Kim ; Dong-Ho Song ; Nam-Wook Kim ; In-Jung Sohn ; Keun-Ah Cheon

Citation: CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE, Vol.15(3) : 222-228, 2017

Keywords: Attention deficit disorder with hyperactivity ; Continuous performance test ; Omission errors ; SNAP-25

Abstract: Objective: This study aimed to investigate the association between the synaptosomal-associated protein 25 kDa (SNAP-25) genotype and performance on the continuous performance test (CPT) in Korean children with attention-deficit/hyperactivity disorder (ADHD).

Methods: Eighty-seven children with ADHD (mean age, 9.23±1.99 years) participated in this study. Omission errors, commission errors, reaction time, and reaction time variability on the CPT were analyzed. The single-nucleotide polymorphism (SNP) rs3746544 (1065 T＞G) of SNAP-25 was genotyped to examine the association with CPT performance.

Results: We found significantly more omission errors on the CPT among children with the TT genotype of SNAP-25 (t=2.56, p=0.012) after correcting for multiple testing.

Conclusion: Our results suggest the possible involvement of the SNAP-25 1065 T＞G polymorphism in the inattention phenotype in children with ADHD. Further studies with more refined neuropsychological measures and much larger sample sizes are needed to confirm our findings.