Antidepressant treatment effects on dopamine transporter availability in patients with major depression: a prospective 123 I-FP-CIT SPECT imaging genetic study

Journal of Neural Transmission
Sabine HellwigPhilipp T Meyer

Abstract

We investigated if sleep deprivation (SD) and electroconvulsive therapy (ECT) affect striatal dopamine transporter (DAT) availability assessed by single-photon emission computed tomography (SPECT) and 123I-FP-CIT, if dopamine transporter gene (SLC6A3; DAT) variation modifies aforementioned parameters, and if SD response or SD-induced DAT changes correlate with ECT response. Sixteen patients with major depression (MDD) referred for ECT and 12 matched controls were prospectively recruited for imaging and SLC6A3 VNTR genotyping. After withdrawal from any psychiatric medication, 123I-FP-CIT-SPECT was acquired at baseline, after SD and after ECT series. Striatal DAT availability was assessed by volume-of-interest analysis of SPECT data. Eleven patients underwent combined treatment with SD and ECT (five ECT responders and six non-responders). Per-protocol analyses yielded no significant effect of SD or ECT on striatal DAT availability using repeated-measures ANOVA. However, intention-to-treat analysis indicated a significant decrease of striatal DAT availability due to SD (paired t test, p < 0.01). Stratification by SLC6A3 VNTR genotype suggested the 9R allele to drive this effect. In an exploratory analysis, SD-induced change in DAT...Continue Reading

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Citations

May 15, 2019·Current Opinion in Neurology·Sabine Hellwig, Katharina Domschke

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