DAT1methylation is associated with methylphenidate response on oppositional and hyperactive-impulsive symptoms in children and adolescents with ADHD

DING, Kaijing, YANG, Jianzhong, REYNOLDS, Gavin, CHEN, Bing, SHAO, Jingru, LIU, Ruixiang, QIAN, Qiujin, LIU, Hua, YANG, Runxu, WEN, Jianfan and KANG, Chuanyuan (2016). DAT1methylation is associated with methylphenidate response on oppositional and hyperactive-impulsive symptoms in children and adolescents with ADHD. The World Journal of Biological Psychiatry, 1-9. (In Press)

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/1562297...
Link to published version:: 10.1080/15622975.2016.1224928

Abstract

Objectives: To examine the association of the DNA methylation of DAT1 and DRD4 gene with methylphenidate (MPH) response in attention deficit hyperactivity disorder (ADHD). Methods: One hundred and eleven DSM-IV defined ADHD Chinese Han children were recruited. Inattention, hyperactivity–impulsivity and oppositional symptoms were evaluated by the Swanson, Nolan and Pelham–IV–parent rating scale (SNAP-IV-P) at baseline and 6 weeks after MPH treatment. DNA methylation of CpG sites in the promoter sequences of DAT1 and DRD4 was examined for association with treatment response. Results: Greater improvement on the SNAP-IV-P total score and percentage change from baseline score were both significantly correlated with DAT1 methylation (rho =−0.222, P = .019 and rho = −0.203, P = .032, respectively). A secondary analysis demonstrated that the effect of DAT1 methylation on symptom response was primarily related to the percentage change in oppositional symptoms (rho = −0.242; P = .012), with a smaller significant effect on hyperactivity–impulsivity (rho = −0.192; P = .045). No significant correlation was found between the treatment effect on inattention and DAT1 methylation (rho = −0.101; P = .292). No significant correlation was observed between mean DRD4 methylation and measures of treatment outcome or baseline symptoms. Conclusions: Our findings provide initial evidence for the involvement of the epigenetic alterations of DAT1 in modulating the response to MPH treatment in ADHD, primarily on oppositional and hyperactive-impulsive symptoms

Item Type: Article
Research Institute, Centre or Group: Biomolecular Sciences Research Centre
Identification Number: 10.1080/15622975.2016.1224928
Depositing User: Carmel House
Date Deposited: 19 Oct 2016 10:11
Last Modified: 19 Oct 2016 10:11
URI: http://shura.shu.ac.uk/id/eprint/13822

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