Frontostriatal Connectivity Changes in Major Depressive Disorder After Repetitive Transcranial Magnetic Stimulation: A Randomized Sham-Controlled Study




Curated By TMS Solutions on Jul 3, 2017 12:00:00 AM
Curated By TMS Solutions

TITLE
Frontostriatal Connectivity Changes in Major Depressive Disorder After Repetitive Transcranial Magnetic Stimulation: A Randomized Sham-Controlled Study

AUTHORS
Kang JI; Lee H; Jhung K; Kim KR; An SK; Yoon KJ; Kim SI; Namkoong K; Lee E. Institution Kang, Jee In. Institute of Behavioral Science in Medicine & Department of Psychiatry, Yonsei University College of Medicine, Seoul, South Korea. Lee, Hyeongrae. Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul, South Korea. Jhung, Kyungun. Department of Adolescent Psychiatry, Seoul National Hospital, Seoul, South Korea. Kim, Kyung Ran. Institute of Behavioral Science in Medicine & Department of Psychiatry, Yonsei University College of Medicine, Seoul, South Korea. An, Suk Kyoon. Institute of Behavioral Science in Medicine & Department of Psychiatry, Yonsei University College of Medicine, Seoul, South Korea. Yoon, Kang-Jun. Department of Neurosurgery, St Peter's Hospital, Seoul, South Korea. Kim, Sun I. Department of Biomedical Engineering, Hanyang University, Seoul, South Korea. Namkoong, Kee. Institute of Behavioral Science in Medicine & Department of Psychiatry, Yonsei University College of Medicine, Seoul, South Korea. Lee, Eun. Department of Psychiatry, Yonsei University College of Medicine, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea. leeeun@yuhs.ac. Lee, Eun. Institute of Behavioral Science in Medicine & Department of Psychiatry, Yonsei University College of Medicine, Seoul, South Korea.

SOURCE
Journal of Clinical Psychiatry. 77(9):e1137-e1143, 2016 Sep.

OBJECTIVE
The aim of this randomized, sham-controlled study was to investigate the therapeutic effects of underlying neurobiological changes after 2-week repetitive transcranial magnetic stimulation (rTMS) treatment using functional connectivity magnetic resonance imaging in patients with major depression.

METHODS
Twenty-four patients with major depressive disorder diagnosed with DSM-IV-TR criteria were randomly assigned to the active rTMS (n = 13) or sham (n = 11) groups from January 2009 to June 2011. rTMS was given for 2 weeks at 110% of the motor threshold for 10 minutes at 10 Hz over the left dorsolateral prefrontal cortex (DLPFC). Resting state functional connectivity was evaluated before and after rTMS. The 17-item Hamilton Depression Rating Scale (HDRS) was administered, and neurocognitive tasks were performed. We examined between-group differences in functional connectivity changes from the bilateral DLPFC.

RESULTS
Participants in the active rTMS group showed significant clinical improvement in HDRS scores compared to those in the sham group (P < .001). After 2-week rTMS, there were significant differences in changes in DLPFC-left caudate connectivity (corrected P < .05): the active group showed a greater reduction of connectivity strength between the DLPFC and left caudate compared to the sham group. Reduced levels of DLPFC-left caudate connectivity predicted improvement in depressive symptoms (r = 0.58, P = .001). Additionally, a positive correlation between residual depressive symptoms and connectivity strength after 2-week rTMS was found (r = 0.46, P = .023).

COONCLUSIONS
High-frequency rTMS over the left DLPFC showed therapeutic effects in patients with major depression. The therapeutic effect of rTMS is related to the modulation of functional connectivity in the frontostriatal network.

TRIAL REGISTRATION
ClinicalTrials.gov identifier: NCT01325831.

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