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Serotonin transporter gene (5-HTT) polymorphisms and compulsive buying.

E J Devor1, H J Magee, R M Dill-Devor

  • 1Integrated DNA Technologies, Coralville, Iowa 52241, USA. rdevor@idtdna.com

American Journal of Medical Genetics
|April 17, 1999
PubMed
Summary

Researchers investigated genetic links to compulsive buying disorder by examining serotonin transporter (5-HTT) gene polymorphisms in patients. No significant differences in these DNA markers were found between compulsive buyers and healthy controls.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Compulsive buying disorder (CBD) is a behavioral addiction characterized by excessive preoccupation and purchasing.
  • Serotonin transporter (5-HTT) gene polymorphisms have been implicated in various psychiatric disorders, including impulse control and mood disorders.

Purpose of the Study:

  • To investigate the association between two specific DNA sequence polymorphisms in the serotonin transporter (5-HTT) gene and compulsive buying disorder.
  • To determine if genetic variations in the 5-HTT gene are more prevalent in individuals with compulsive buying disorder compared to a healthy control group.

Main Methods:

  • Genotyping of two 5-HTT gene polymorphisms: a 44-base pair (bp) deletion in the promoter region and a variable number of tandem repeats (VNTR) in the second intron.

Related Experiment Videos

  • Analysis of DNA samples from a cohort of 21 patients diagnosed with compulsive buying disorder.
  • Comparison of genotype frequencies of the 5-HTT markers between the patient group and a control group of 38 psychiatrically normal individuals.

    • Main Results:

    • No statistically significant differences were observed in the frequencies of either the 5-HTT promoter region polymorphism or the 5-HTT intron polymorphism between patients with compulsive buying disorder and the control group.
    • The genetic variations examined in the 5-HTT gene do not appear to be associated with compulsive buying disorder in this study cohort.

    Conclusions:

    • The findings suggest that the investigated polymorphisms in the serotonin transporter (5-HTT) gene are not significantly associated with compulsive buying disorder.
    • Further research with larger sample sizes and examination of other genetic and environmental factors may be warranted to elucidate the genetic underpinnings of compulsive buying disorder.