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An investigation of the alpha1A-adrenergic receptor gene and antipsychotic-induced side-effects

Pilar A Saiz1, Margaret T Susce, Dan A Clark

  • 1Clinical Neuropharmacology, Institute of Psychiatry-King's College, London, UK.

Human Psychopharmacology
|November 1, 2007
PubMed

Insights

Genetic variants in the alpha(1A)-adrenergic receptor are not strongly linked to antipsychotic side-effects like weight gain and tardive dyskinesia (TD). Further research is needed to understand these adverse drug reactions.

Area of Science:

  • Pharmacogenetics
  • Neuroscience
  • Psychiatry

Background:

  • Antipsychotic medications can cause significant side-effects, including tardive dyskinesia (TD), weight gain, sedation, and extrapyramidal side-effects (EPS).
  • Identifying factors contributing to these side-effects is crucial for improving patient outcomes and treatment efficacy.
  • Genetic variations in drug targets are hypothesized to influence the development of antipsychotic-induced adverse effects.

Purpose of the Study:

  • To investigate the potential association between specific genetic variants of the alpha(1A)-adrenergic receptor and the occurrence of side-effects in patients treated with antipsychotic drugs.
  • To determine if genetic variations in this receptor play a significant role in common antipsychotic-induced adverse effects.

Main Methods:

  • A cohort of 427 US Caucasian patients receiving antipsychotic medication was studied.
  • Genetic variants (-563-C/T, -4155-G/C, and -4884-A/G) in the alpha(1A)-adrenergic receptor gene were analyzed.
  • Associations between these genetic variants and reported side-effects were statistically evaluated.

Main Results:

  • Several marginal associations (p < 0.05) were observed between alpha(1A)-adrenergic receptor genetic variants and antipsychotic-induced side-effects.
  • These associations did not achieve statistical significance after corrections for multiple comparisons.
  • The study found no strong evidence to support a major role for these alpha(1A)-adrenergic genetic variants in obesity or other side-effects.

Conclusions:

  • The investigated genetic variants of the alpha(1A)-adrenergic receptor do not appear to be major contributors to the development of common side-effects associated with prolonged antipsychotic treatment.
  • Further research into other genetic factors or biological pathways may be necessary to fully understand the etiology of antipsychotic-induced adverse effects.

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