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Association of response to methylphenidate in adults with ADHD with a polymorphism in SLC6A3 (DAT1)
Published online by Cambridge University Press: 16 April 2020
Abstract
During this presentation, the first pharmacogenetic study on response to methylphenidate (MPH) in adults with ADHD will be reported.
We performed a stratified analysis of the association between response to MPH, assessed under double-blind conditions, in 42 adults with ADHD, and polymorphisms in the genes encoding the dopamine transporter, SLC6A3 (DAT1), the norepinephrine transporter, SLC6A2 (NET), and the dopamine receptor D4, DRD4.
Polymorphisms in the DRD4 and the SLC6A2 (NET) genes were not significantly associated with the response to MPH treatment; however, the VNTR polymorphism in the 3'untranslated region of SLC6A3 (DAT1) was significantly associated with an increased likelihood of a response to MPH treatment (odds ratio 5.4; 95% CI 1.4-21.9) in heterozygous 10-repeat allele carriers in comparison with the 10/10 homozygotes: 52.2% of the participants heterozygous for the 10-repeat allele improved significantly on MPH treatment whereas only 22.2% of the 10/10 homozygous individuals did.
This study confirms that the SLC6A3 (DAT1) genotype may have an influential role in determining the response to MPH in the treatment of ADHD. The SLC6A3 (DAT1) gene might be a factor worth evaluating further in the future regarding choice of treatment and possibly dose adjustment.
- Type
- S41. Symposium: Genes, Endophenotypes and Treatment of Adult ADHD
- Information
- European Psychiatry , Volume 22 , Issue S1: 15th AEP Congress - Abstract book - 15th AEP Congress , March 2007 , pp. S62
- Copyright
- Copyright © European Psychiatric Association 2007
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