No association between the dihydropyrimidinase-related protein 2 (DRP-2) gene and bipolar disorder in humans

  • Nakata K
  • Ujike H
  • Tanaka Y
 et al. 
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Several susceptibility loci for both of schizophrenia and bipolar disorder (BPD) have been found to overlap on several chromosomes including 8p21. Expression of dihydropyrimidinase-related protein 2 (DRP-2), which gene is located on 8p21, was found to be reduced in the brains of individuals with schizophrenia and BPD. Recently, we demonstrated a significant association between the DRP-2 gene and schizophrenia. Based on the rationale, we investigated the genetic association of the DRP-2 gene with BPD using a case-control study in the Japanese population. However, no significant associations were found between five polymorphisms of the DRP-2 gene (-975C>G, 352G>A, 426C>T, 1506T>C, and *2236T>C), and BPD, nor were associations detected between either of the polymorphisms and any subtype of BPD, bipolars I and II. The present study did not provide any evidence for a contribution of the DRP-2 gene to susceptibility to BPD. © 2003 Published by Elsevier Ireland Ltd.

Author-supplied keywords

  • Association study
  • Bipolar disorder
  • Collapsin response mediator protein 2
  • Dihydropyrimidinase-related protein 2
  • Polymorphism

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  • Kenji Nakata

  • Hiroshi Ujike

  • Yuji Tanaka

  • Manabu Takaki

  • Ayumu Sakai

  • Akira Nomura

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