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The interaction between dopamine transporter function, gender differences, and possible laterality in depression.

Mei-Chun Hsiao1, Kun-Ju Lin, Chia-Yih Liu

  • 1Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou and Chang-Gung University School of Medicine, Taoyuan 333, Taiwan. nora.hsiao@msa.hinet.net

Psychiatry Research
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

Major depression is linked to higher Dopamine Transporter (DAT) availability. Bupropion treatment significantly decreased DAT binding in depressed patients, particularly in women.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Radiology

Background:

  • The Dopamine Transporter (DAT) is a key indicator of striatal dopamine activity.
  • Altered DAT levels are implicated in major depressive disorder (MDD).

Purpose of the Study:

  • To investigate the role of DAT in MDD patients before and after bupropion treatment.
  • To compare DAT availability between depressed patients and healthy controls.
  • To explore sex differences in DAT availability and treatment response.

Main Methods:

  • 23 MDD patients and 20 healthy controls underwent (99m)Tc-TRODAT-1 SPECT scans before and after 8 weeks of bupropion treatment.
  • Hamilton Depression Rating Scale (HDRS) was used for clinical assessment.
  • DAT binding ratios in the striatum, caudate, and putamen were calculated using SPECT imaging.

Main Results:

  • Depressed patients exhibited significantly higher DAT availability in the striatum compared to controls.
  • Bupropion treatment led to a significant decrease in striatal DAT binding in MDD patients.
  • Women showed higher initial and post-treatment DAT binding in the caudate compared to men.
  • DAT binding decreased in most brain regions in women but only in the right caudate in men after treatment.

Conclusions:

  • Increased DAT availability is associated with major depression.
  • Bupropion treatment effectively reduces DAT availability in depressed individuals.
  • Sex-based differences in DAT availability and treatment response warrant further investigation.