Stephan Goerigk1, Eric Cretaz2, Bernardo Sampaio-Junior3, Érica Leandro Marciano Vieira4, Wagner Gattaz5, Izio Klein5, Beny Lafer6, Antônio Lúcio Teixeira7, André F Carvalho8, Paulo A Lotufo9, Isabela M Benseñor9, Markus Bühner10, Frank Padberg11, André R Brunoni12. 1. Department of Psychological Methodology and Assessment, Ludwig-Maximilians-University, Munich, Germany; Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-Universität, Nußbaumstraße 7, 80336 Munich, Germany; Hochschule Fresenius, University of Applied Sciences, Munich, Germany. 2. ECT Service, Department and Institute of Psychiatry, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil; Bipolar Disorder Research Program, Department and Institute of Psychiatry, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil. 3. Private practice, São Paulo, Brazil. 4. Interdisciplinary Laboratory of Medical Investigation, Faculdade de Medicina, Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centre for Addiction and Mental Healthy (CAMH), Toronto, ON, Canada. 5. Laboratory of Neurosciences (LIM-27), Instituto Nacional de Biomarcadores em Neuropsiquiatria (INBioN), Department and Institute of Psychiatry, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil. 6. Bipolar Disorder Research Program, Department and Institute of Psychiatry, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil. 7. Interdisciplinary Laboratory of Medical Investigation, Faculdade de Medicina, Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Neuropsychiatry Program, Department of Psychiatry and Behavioral Science, UT Health, Houston, United States of America. 8. Department of Psychiatry, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Centre for Addiction and Mental Healthy (CAMH), Toronto, ON, Canada. 9. Department of Internal Medicine, Faculdade de Medicina da Universidade de São Paulo & Hospital Universitário, Universidade de São Paulo, Av. Prof Lineu Prestes 2565, 05508-000 São Paulo, Brazil. 10. Department of Psychological Methodology and Assessment, Ludwig-Maximilians-University, Munich, Germany. 11. Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-Universität, Nußbaumstraße 7, 80336 Munich, Germany. 12. Laboratory of Neurosciences (LIM-27), Instituto Nacional de Biomarcadores em Neuropsiquiatria (INBioN), Department and Institute of Psychiatry, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil; Department of Internal Medicine, Faculdade de Medicina da Universidade de São Paulo & Hospital Universitário, Universidade de São Paulo, Av. Prof Lineu Prestes 2565, 05508-000 São Paulo, Brazil. Electronic address: brunoni@usp.br.
Abstract
OBJECTIVES: We investigated the role of peripheral biomarkers associated with neuroplasticity and immune-inflammatory processes on the effects of transcranial direct current stimulation (tDCS), a safe, affordable, and portable non-invasive neuromodulatory treatment, in bipolar depression. METHODS: This is an exploratory analysis using a dataset from the sham-controlled study the Bipolar Depression Electrical Treatment Trial (BETTER)(clinicaltrials.govNCT02152878). Participants were 52 adults with type I or II bipolar disorder in a moderate-to-severe depressive episode, randomized to 12 bifrontal active or sham tDCS sessions over a 6-week treatment course. Plasma levels of brain derived neurotrophic factor (BDNF), glial cell derived neurotrophic factor (GDNF), interleukins (IL) 2, 4, 6, 8, 10, 18, 33, 1β, 12p70, 17a, interferon gamma (IFN), tumor necrosis factor alpha (TNF) and its soluble receptors 1 and 2, ST2, and KLOTHO were investigated at baseline and endpoint. We performed analyses unadjusted for multiple testing to evaluate whether baseline biomarkers were predictive for depression improvement and changed during treatment using linear regression models. RESULTS: A time x group interaction (Cohen's d: -1.16, 95% CI = -1.96 to -0.3, p = .005) was found for IL-8, with greater reductions after active tDCS. Higher baseline IL-6 plasma levels was associated with symptomatic improvement after tDCS (F(1,43) = 5.43; p = .025). Other associations were not significant. CONCLUSIONS: Our exploratory findings suggested that IL-6 is a potential predictor of tDCS response and IL-8 might decrease after tDCS; although confirmatory studies are warranted due to the multiplicity of comparisons.
OBJECTIVES: We investigated the role of peripheral biomarkers associated with neuroplasticity and immune-inflammatory processes on the effects of transcranial direct current stimulation (tDCS), a safe, affordable, and portable non-invasive neuromodulatory treatment, in bipolar depression. METHODS: This is an exploratory analysis using a dataset from the sham-controlled study the Bipolar Depression Electrical Treatment Trial (BETTER)(clinicaltrials.govNCT02152878). Participants were 52 adults with type I or II bipolar disorder in a moderate-to-severe depressive episode, randomized to 12 bifrontal active or sham tDCS sessions over a 6-week treatment course. Plasma levels of brain derived neurotrophic factor (BDNF), glial cell derived neurotrophic factor (GDNF), interleukins (IL) 2, 4, 6, 8, 10, 18, 33, 1β, 12p70, 17a, interferon gamma (IFN), tumor necrosis factor alpha (TNF) and its soluble receptors 1 and 2, ST2, and KLOTHO were investigated at baseline and endpoint. We performed analyses unadjusted for multiple testing to evaluate whether baseline biomarkers were predictive for depression improvement and changed during treatment using linear regression models. RESULTS: A time x group interaction (Cohen's d: -1.16, 95% CI = -1.96 to -0.3, p = .005) was found for IL-8, with greater reductions after active tDCS. Higher baseline IL-6 plasma levels was associated with symptomatic improvement after tDCS (F(1,43) = 5.43; p = .025). Other associations were not significant. CONCLUSIONS: Our exploratory findings suggested that IL-6 is a potential predictor of tDCS response and IL-8 might decrease after tDCS; although confirmatory studies are warranted due to the multiplicity of comparisons.
Authors: Hyein Cho; Lais B Razza; Lucas Borrione; Marom Bikson; Leigh Charvet; Tracy A Dennis-Tiwary; Andre R Brunoni; Pedro Sudbrack-Oliveira Journal: Focus (Am Psychiatr Publ) Date: 2022-01-25