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Biol Psychiatry. 2009 Apr 1;65(7):625-30. doi: 10.1016/j.biopsych.2008.09.035. Epub 2008 Dec 5.

A common variant in DRD3 receptor is associated with autism spectrum disorder.

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  • 1Department of Neuroscience and Pharmacology and Department of Child and Adolescent Psychiatry, Rudolph Magnus Institute of Neuroscience, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, The Netherlands.

Abstract

BACKGROUND:

The presence of specific and common genetic etiologies for autism spectrum disorders (ASD) and attention-deficit/hyperactivity disorder (ADHD) was investigated for 132 candidate genes in a two-stage design-association study.

METHODS:

1,536 single nucleotide polymorphisms (SNPs) covering these candidate genes were tested in ASD (n = 144) and ADHD (n = 110) patients and control subjects (n = 404) from The Netherlands. A second stage was performed with those SNPs from Stage I reaching a significance threshold for association of p < .01 in an independent sample of ASD patients (n = 128) and controls (n = 124) from the United Kingdom and a Dutch ADHD (n = 150) and control (n = 149) sample.

RESULTS:

No shared association was found between ASD and ADHD. However, in the first and second ASD samples and in a joint statistical analysis, a significant association between SNP rs167771 located in the DRD3 gene was found (joint analysis uncorrected: p = 3.11 x 10(-6); corrected for multiple testing and potential stratification: p = .00162).

CONCLUSIONS:

The DRD3 gene is related to stereotyped behavior, liability to side effects of antipsychotic medication, and movement disorders and may therefore have important clinical implications for ASD.

PMID:
19058789
[PubMed - indexed for MEDLINE]
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