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European Archives of Psychiatry and Clinical Neuroscience

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01-02-2021 | Antidepressant Drugs | Original Paper

Prefrontal resting-state connectivity and antidepressant response: no associations in the ELECT-TDCS trial

Authors: Lucia Bulubas, Frank Padberg, Eva Mezger, Paulo Suen, Priscila V. Bueno, Fabio Duran, Geraldo Busatto, Edson Amaro Jr, Isabela M. Benseñor, Paulo A. Lotufo, Stephan Goerigk, Wagner Gattaz, Daniel Keeser, Andre R. Brunoni

Published in: European Archives of Psychiatry and Clinical Neuroscience | Issue 1/2021

Abstract

Functional and structural MRI of prefrontal cortex (PFC) may provide putative biomarkers for predicting the treatment response to transcranial direct current stimulation (tDCS) in depression. A recent MRI study from ELECT-TDCS (Escitalopram versus Electrical Direct-Current Theror Depression Study) showed that depression improvement after tDCS was associated with gray matter volumes of PFC subregions. Based thereon, we investigated whether antidepressant effects of tDCS are similarly associated with baseline resting-state functional connectivity (rsFC). A subgroup of 51 patients underwent baseline rsFC-MRI. All patients of ELECT-TDCS were randomized to three treatment arms for 10 weeks (anodal-left, cathodal-right PFC tDCS plus placebo medication; escitalopram 10 mg/day for 3 weeks and 20 mg/day thereafter plus sham tDCS; and placebo medication plus sham tDCS). RsFC was calculated for various PFC regions and analyzed in relation to the individual antidepressant response. There was no significant association between baseline PFC connectivity of essential structural regions, nor any other PFC regions (after correction for multiple comparisons) and patients’ individual antidepressant response. This study did not reveal an association between antidepressants effects of tDCS and baseline rsFC, unlike the gray matter volume findings. Thus, the antidepressant effects of tDCS may be differentially related to structural and functional MRI measurements.

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Title: Prefrontal resting-state connectivity and antidepressant response: no associations in the ELECT-TDCS trial
Authors: Lucia Bulubas
Frank Padberg
Eva Mezger
Paulo Suen
Priscila V. Bueno
Fabio Duran
Geraldo Busatto
Edson Amaro Jr
Isabela M. Benseñor
Paulo A. Lotufo
Stephan Goerigk
Wagner Gattaz
Daniel Keeser
Andre R. Brunoni
Publication date: 01-02-2021
Publisher: Springer Berlin Heidelberg
Keywords: Antidepressant Drugs
Affective Disorder
Repetitive Transcranial Magnetic Stimulation
Affective Disorder
Antidepressant Drugs
Escitalopram
Published in: European Archives of Psychiatry and Clinical Neuroscience / Issue 1/2021
Print ISSN: 0940-1334
Electronic ISSN: 1433-8491
DOI: https://doi.org/10.1007/s00406-020-01187-y

At a glance: The STEP trials

Springer Medicine

Prefrontal resting-state connectivity and antidepressant response: no associations in the ELECT-TDCS trial

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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