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The-141C Ins/Del polymorphism of the dopamine D2 receptor gene is not associated with either migraine or Parkinson's disease

Maude S, Curtin JA, Breen G, Collier D, Russell G, Shaw D, St Clair D

Psychiatric Genetics. 2001;11, 1.

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Abstract

Abnormalities in dopamine neurotransmission at the dopamine D2 receptor (DRD2) have been implicated in both migraine and Parkinson's disease. Positive associations have also been found between polymorphisms within the DRD2 gene and both of these conditions. The -141C Ins/Del polymorphism in the DRD2 receptor gene is a putative functional polymorphism. The purpose of this study was to determine whether it and any genes in linkage disequilibrium with this marker are involved in either of these conditions. We have compared the genotype and allele frequencies of the -141C Ins/Del polymorphism in 200 migraineurs and 260 Parkinson's disease cases with 464 controls. We have found no association between the receptor gene and either condition (P = 0.89 and P = 0.56 respectively). Our findings do not support the hypothesis that this polymorphism is involved in the aetiology of migraine or Parkinson's disease. Psychiatr Genet 11:49-52 (C) 2001 Lippincott Williams & Wilkins.