Original Paper

European Archives of Psychiatry and Clinical Neuroscience

, Volume 263, Issue 1, pp 65-74

Influence of ANKK1 and DRD2 polymorphisms in response to haloperidol

  • Ina GieglingAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
  • , Beatrice BalzarroAffiliated withInstitute of Psychiatry, University of Bologna
  • , Stefano PorcelliAffiliated withInstitute of Psychiatry, University of Bologna
  • , Martin SchäferAffiliated withDepartment of Psychiatry, Ludwig Maximilians UniversityKliniken Essen Mitte
  • , Annette M. HartmannAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
  • , Marion FriedlAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
  • , Bettina KonteAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
  • , Philipp KrämerAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
  • , Hans-Jürgen MöllerAffiliated withDepartment of Psychiatry, Ludwig Maximilians University
    • , Diana De RonchiAffiliated withInstitute of Psychiatry, University of Bologna
    • , Hans H. StassenAffiliated withPsychiatric University Hospital
    • , Alessandro SerrettiAffiliated withInstitute of Psychiatry, University of Bologna Email author 
    • , Dan RujescuAffiliated withDepartment of Psychiatry, Ludwig Maximilians UniversityDepartment of Psychiatry, University of Halle

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Abstract

The present study explores whether ankyrin repeat and kinase domain containing 1 (ANKK1) and dopamine receptor D2 (DRD2) variants could predict efficacy and tolerability of haloperidol in the treatment of psychotic patients. We also attempted to replicate findings in a group of schizophrenic patients from the Clinical Antipsychotic Trials in Intervention Effectiveness (CATIE) study. Eighty-eight acutely psychotic patients were genotyped for 9 ANKK1 and 27 DRD2 SNPs. Treatment efficacy and tolerability were assessed using the Positive and Negative Symptoms Scale and the Udvalg for Kliniske Undersogelser side effects rating scales, respectively. Multivariate analyses were employed to test possible influences of single-nucleotide polymorphisms on clinical and safety variables. Analysis of haplotypes was also performed. Outcomes in the replication sample were response versus nonresponse and the presence versus absence of motor side effects at 1 month of treatment. rs2242592 within ANKK1 gene and rs1124493 within DRD2 gene were associated with clinical improvement (p = 0.008 and p = 0.001, respectively). Results were confirmed in the allelic analysis. Three haplotype blocks, one among ANKK1 and two among DRD2 gene were associated with better clinical improvement. Our results were not replicated in the CATIE sample, although rs11604671, which is in strong linkage disequilibrium with rs2242592, was associated with response in the replication sample. Our findings support a possible role of ANKK1 and DRD2 variability on haloperidol efficacy. However, due to the discrepancies between the results in the two samples, our results need further validation.

Keywords

Pharmacogenetics Schizophrenia Antipsychotics Gene Haloperidol