Cited by 64Attention Deficit Hyperactivity DisorderNeurotransmitter Receptor Influence on BehaviorPharmacogenetics and Drug Metabolism

Meta-analysis of the association between dopamine transporter genotype and response to methylphenidate treatment in ADHD

Kambeitz, J, Romanos, M, Ettinger, U·2014·The Pharmacogenomics Journal

Abstract

Attention-deficit/hyperactivity disorder (ADHD) is a prevalent childhood-onset neuropsychiatric disorder. Treatment with methylphenidate, which blocks dopamine and noradrenaline transporters, is clinically efficacious in reducing the symptoms of ADHD. However, a considerable proportion of patients show no or only insufficient response to methylphenidate. Following a pharmacogenetic approach, a number of studies have suggested that heterogeneity in treatment response across subjects might to some extent be due to genetic factors. In particular, a variable number tandem repeat (VNTR) polymorphism in the 3' untranslated region of the SLC6A3 gene, which codes for the dopamine transporter, has been considered as a predictor of treatment success. However, the literature has so far been inconsistent. Here we present results of a meta-analysis of studies investigating the moderating effect of the SLC6A3 VNTR on response to methylphenidate treatment in subjects with ADHD. Outcome measures from 16 studies including data from 1572 subjects were entered into a random-effects model. There was no significant summary effect for the SLC6A3 VNTR on the response to methylphenidate treatment (P>0.5) and no effect on specific symptom dimensions of hyperactivity/impulsivity and inattention (all P>0.2). However, in a subanalysis of naturalistic trials, we observed a significant effect of d=-0.36 (P=0.03), indicating that 10R homozygotes show less improvement in symptoms following treatment than the non-10/10 carriers. This meta-analysis indicates that SLC6A3 VNTR is not a reliable predictor of methylphenidate treatment success in ADHD. Our study leaves unanswered the question of whether other genetic polymorphisms or nongenetic factors may contribute to the observed heterogeneity in treatment response across ADHD subjects.

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Crossref · 10.1038/tpj.2013.9

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  • Recent meta-analyses did not support the polymorphism association hypothesis for methylphenidate treatment response.

    “However, recent meta-analyses did not support this polymorphism association hypothesis (Kambeitz et al., 2014; Bonvicini et al., 2016).”

    From A Review of Heterogeneity in Attention Deficit/Hyperactivity Disorder (ADHD) (2019) · cites this paper as Kambeitz et al., 2014

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Authors
Kambeitz, J., Romanos, M., & Ettinger, U.
Affiliations
  • Ludwig-Maximilians-Universität München (DE)
  • Universitätsklinikum Würzburg (DE)
  • University of Bonn (DE)
Corresponding author
Kambeitz, J
Venue
The Pharmacogenomics Journal
Published
2013-04-16
Volume
14
Issue
1
Pages
77-84
ISSN
  • 1470-269X (ISSN-L)
  • 1473-1150
OpenAlex
W2034027897
Cited by
64
References
84
Citations by year
2025: 1 · 2024: 2 · 2023: 4 · 2022: 1 · 2021: 6 · 2020: 5 · 2019: 7 · 2018: 4 · 2017: 4 · 2016: 11 · 2015: 7 · 2014: 9 · 2013: 2
FWCI
1.32
Type
journal article
Language
en
Open access
closed
Locations
  • The Pharmacogenomics Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
attention deficit hyperactivity disorder, methylphenidate, dopamine transporter, VNTR polymorphism, pharmacogenetics, treatment response, hyperactivity/impulsivity, inattention, genetic predictors of treatment response
MeSH terms
Attention Deficit Disorder with Hyperactivity, Genotype, Humans, Methylphenidate, Polymorphism, Genetic, Treatment Outcome, Dopamine Uptake Inhibitors, Tandem Repeat Sequences, 3' Untranslated Regions, Dopamine Plasma Membrane Transport Proteins

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