technical-aspect-automated-synthesis-real-time-kinetic-evaluation

Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [<sup>11</sup>C]SNAP-7941

Positron emission tomography (PET) is an essential molecular imaging technique providing insights into pathways and using specific targeted radioligands ...

Medical University of Vienna

University of Vienna

Primary staging of prostate cancer relies on modalities, which are limited. We evaluate simultaneous [Ga]Ga-PSMA-11 PET (PSMA-PET)/MRI as a new diagnostic method for primary tumor-node-metastasis staging compared with histology and its impact on therapeutic decisions.

PSMA Ligand PET/MRI for Primary Prostate Cancer: Staging Performance and Clinical Impact.

Increased cerebral monoamine oxidase A (MAO-A) levels have been shown in non-seasonal depression using positron emission tomography (PET). Seasonal affective disorder (SAD) is a sub-form of major depressive disorder and is typically treated with bright light therapy (BLT). The serotonergic system is affected by season and light. Hence, this study aims to assess the relevance of brain MAO-A levels to the pathophysiology and treatment of SAD. Changes to cerebral MAO-A distribution (1) in SAD in comparison to healthy controls (HC), (2) after treatment with BLT and (3) between the seasons, were investigated in 24 patients with SAD and 27 HC using [C]harmine PET. PET scans were performed in fall/winter before and after 3 weeks of placebo-controlled BLT, as well as in spring/summer. Cerebral MAO-A distribution volume (V, an index of MAO-A density) did not differ between patients and HC at any of the three time-points. However, MAO-A V decreased from fall/winter to spring/summer in the HC group (F = 4.79, p < 0.050), while SAD showed no change. In addition, BLT, but not placebo, resulted in a significant reduction in MAO-A V (F = 25.96, p < 0.001). This is the first study to demonstrate an influence of BLT on human cerebral MAO-A levels in vivo. Furthermore, we show that SAD may lack seasonal dynamics in brain MAO-A levels. The lack of a cross-sectional difference between patients and HC, in contrast to studies in non-seasonal depression, may be due to the milder symptoms typically shown by patients with SAD.

Brain monoamine oxidase A in seasonal affective disorder and treatment with bright light therapy.

Electroconvulsive therapy (ECT) constitutes one of the most effective antidepressant treatment strategies in major depression (MDD). Despite its common use and uncontested efficacy, its mechanism of action is still insufficiently understood. Previously, we showed that ECT is accompanied by a global decrease of serotonin-1A receptors in MDD; however, further studies to investigate the involvement of the serotonergic system in the mechanism of action of ECT are warranted. The monoamine oxidase A (MAO-A) represents an important target for antidepressant treatments and was found to be increased in MDD. Here, we investigated whether ECT impacts on MAO-A levels in treatment-resistant patients (TRD).

The effect of electroconvulsive therapy on cerebral monoamine oxidase A expression in treatment-resistant depression investigated using positron emission tomography.

Theresa Balber

Department of Biomedical Imaging and Image-guided Therapy,
Division of Nuclear Medicine,
Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine

Medical University of Vienna

Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [¹¹C]SNAP-7941

Theresa Balber

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Department of Biomedical Imaging and Image-guided Therapy,Division of Nuclear Medicine,Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine

Medical University of Vienna

Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [11C]SNAP-7941

Department of Biomedical Imaging and Image-guided Therapy,
Division of Nuclear Medicine,
Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine

Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [¹¹C]SNAP-7941