Dopamine transporter availability in medication free and in bupropion treated depression: A 99mTc-TRODAT-1 SPECT study

Miklós Árgyelán, Zoltán Szabó, Balázs Kanyó, Attila Tanács, Zsuzsanna Kovács, Zoltán Janka, László Pávics

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Background: Bupropion is thought to exert its antidepressive effect by blocking the dopamine transporter (DAT). The purpose of this study was to evaluate the DAT activity in depressed patients by means of 99mTc- TRODAT-1 SPECT in relation to the efficacy of bupropion treatment. Methods: In 12 healthy controls and 16 depressed patients the baseline DAT activity was examined. Nine of the 16 patients went through an additional second SPECT investigation, after 4 weeks of bupropion treatment. Results: In the depressed patients, the baseline DAT striatum-occipital ratio (SOR) (1.04 ± .36, mean ± SD) was not significantly different from that in the control group (1.12 ± .33) (p > .05). Correlation was found between baseline SOR and HAM-D score change (r = - .745, p = .02) of the bupropion treated patients. The average DAT occupancy due to the bupropion treatment was 20.84 ± 27.7%. No significant correlation between the therapeutical effectiveness and the occupancy was observed. Limitations: One of the limiting factors of our study has been the lack of drug monitoring. Conclusions: In good agreement with other PET studies, we found 20.84% DAT occupancy during bupropion treatment. The lack of correlation between the efficacy of therapy and occupancy of DAT may raise the question as to whether other mechanisms are involved in the effect of bupropion.

Original languageEnglish
Pages (from-to)115-123
Number of pages9
JournalJournal of affective disorders
Volume89
Issue number1-3
DOIs
Publication statusPublished - Dec 1 2005

Keywords

  • Bupropion
  • DAT
  • Depression
  • Occupancy
  • SPECT
  • TRODAT-1

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'Dopamine transporter availability in medication free and in bupropion treated depression: A <sup>99m</sup>Tc-TRODAT-1 SPECT study'. Together they form a unique fingerprint.

  • Cite this