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Harika-Germaneau G, Gosez J, Bokam P, Guillevin R, Doolub D, Thirioux B, Wassouf I, Germaneau A, Langbour N, Jaafari N. Investigating brain structure and tDCS response in obsessive-compulsive disorder. J Psychiatr Res 2024; 177:39-45. [PMID: 38971055 DOI: 10.1016/j.jpsychires.2024.06.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 06/21/2024] [Accepted: 06/28/2024] [Indexed: 07/08/2024]
Abstract
Obsessive-Compulsive Disorder (OCD) is characterized by intrusive thoughts and repetitive behaviors, with associated brain abnormalities in various regions. This study explores the correlation between neural biomarkers and the response to transcranial Direct Current Stimulation (tDCS) in OCD patients. Using structural MRI data from two tDCS trials involving 55 OCD patients and 28 controls, cortical thickness, and gray matter morphometry was analyzed. Findings revealed thicker precentral and paracentral areas in OCD patients, compared to control (p < 0.001). Correlations between cortical thickness and treatment response indicated a significant association between a thinner precentral area and reduced Yale-Brown Obsessive Compulsive Scale (YBOCS) scores (p = 0.02). While results highlight the complexity of treatment response predictors, this study sheds light on potential neural markers for tDCS response in OCD patients. Further investigations with larger datasets are warranted to better understand the underpinnings of these biomarkers and their implications for personalized treatment approaches.
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Affiliation(s)
- Ghina Harika-Germaneau
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France
| | - Julien Gosez
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Institut Pprime, UPR 3346, Université de Poitiers, France; Ansys France.
| | | | - Rémy Guillevin
- CHU de Poitiers, Service de Radiologie, Poitiers, France; LabCom I3M, eq. Dactim Mis, LMA, UMR CNRS 7348, Poitiers, France
| | - Damien Doolub
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France
| | - Berangere Thirioux
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France
| | - Issa Wassouf
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France; Centre Hospitalier Nord Deux-Sèvres, Service de Psychiatrie Adulte, Niort, France
| | | | - Nicolas Langbour
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France
| | - Nematollah Jaafari
- Unité de Recherche Clinique Intersectorielle en Psychiatrie à Vocation Régionale Pierre Deniker, Centre Hospitalier Henri Laborit, Poitiers, France; Centre de Recherches sur la Cognition et l'Apprentissage, CNRS 7295, Université de Poitiers, France
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Agrawal A, Agarwal V, Kar SK, Arya A. Transcranial direct current stimulation as early augmentation in adolescent obsessive compulsive disorder: A pilot proof-of-concept randomized control trial. World J Clin Pediatr 2024; 13:93138. [PMID: 38947993 PMCID: PMC11212764 DOI: 10.5409/wjcp.v13.i2.93138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/09/2024] [Accepted: 04/24/2024] [Indexed: 06/07/2024] Open
Abstract
BACKGROUND Transcranial direct current stimulation (tDCS) is proven to be safe in treating various neurological conditions in children and adolescents. It is also an effective method in the treatment of OCD in adults. AIM To assess the safety and efficacy of tDCS as an add-on therapy in drug-naive adolescents with OCD. METHODS We studied drug-naïve adolescents with OCD, using a Children's Yale-Brown obsessive-compulsive scale (CY-BOCS) scale to assess their condition. Both active and sham groups were given fluoxetine, and we applied cathode and anode over the supplementary motor area and deltoid for 20 min in 10 sessions. Reassessment occurred at 2, 6, and 12 wk using CY-BOCS. RESULTS Eighteen adolescents completed the study (10-active, 8-sham group). CY-BOCS scores from baseline to 12 wk reduced significantly in both groups but change at baseline to 2 wk was significant in the active group only. The mean change at 2 wk was more in the active group (11.8 ± 7.77 vs 5.25 ± 2.22, P = 0.056). Adverse effects between the groups were comparable. CONCLUSION tDCS is safe and well tolerated for the treatment of OCD in adolescents. However, there is a need for further studies with a larger sample population to confirm the effectiveness of tDCS as early augmentation in OCD in this population.
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Affiliation(s)
- Aditya Agrawal
- Department of Psychiatry, King George Medical University, Uttar Pradesh, Lucknow 226003, India
| | - Vivek Agarwal
- Department of Psychiatry, King George Medical University, Uttar Pradesh, Lucknow 226003, India
| | - Sujita Kumar Kar
- Department of Psychiatry, King George Medical University, Uttar Pradesh, Lucknow 226003, India
| | - Amit Arya
- Department of Psychiatry, King George Medical University, Uttar Pradesh, Lucknow 226003, India
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3
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Fineberg NA, Cinosi E, Smith MVA, Busby AD, Wellsted D, Huneke NTM, Garg K, Aslan IH, Enara A, Garner M, Gordon R, Hall N, Meron D, Robbins TW, Wyatt S, Pellegrini L, Baldwin DS. Feasibility, acceptability and practicality of transcranial stimulation in obsessive compulsive symptoms (FEATSOCS): A randomised controlled crossover trial. Compr Psychiatry 2023; 122:152371. [PMID: 36709558 DOI: 10.1016/j.comppsych.2023.152371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Transcranial direct current stimulation (tDCS) is a non-invasive form of neurostimulation with potential for development as a self-administered intervention. It has shown promise as a safe and effective treatment for obsessive compulsive disorder (OCD) in a small number of studies. The two most favourable stimulation targets appear to be the left orbitofrontal cortex (L-OFC) and the supplementary motor area (SMA). We report the first study to test these targets head-to-head within a randomised sham-controlled trial. Our aim was to inform the design of future clinical research studies, by focussing on the acceptability and safety of the intervention, feasibility of recruitment, adherence to and tolerability of tDCS, and the size of any treatment-effect. METHODS FEATSOCS was a randomised, double-blind, sham-controlled, cross-over, multicentre study. Twenty adults with DSM-5-defined OCD were randomised to treatment, comprising three courses of clinic-based tDCS (SMA, L-OFC, Sham), randomly allocated and delivered in counterbalanced order. Each course comprised four 20-min 2 mA stimulations, delivered over two consecutive days, separated by a 'washout' period of at least four weeks. Assessments were carried out by raters who were blind to stimulation-type. Clinical outcomes were assessed before, during, and up to four weeks after stimulation. Patient representatives with lived experience of OCD were actively involved at all stages. RESULTS Clinicians showed willingness to recruit participants and recruitment to target was achieved. Adherence to treatment and study interventions was generally good, with only two dropouts. There were no serious adverse events, and adverse effects which did occur were transient and mostly mild in intensity. Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) scores were numerically improved from baseline to 24 h after the final stimulation across all intervention groups but tended to worsen thereafter. The greatest effect size was seen in the L-OFC arm, (Cohen's d = -0.5 [95% CI -1.2 to 0.2] versus Sham), suggesting this stimulation site should be pursued in further studies. Additional significant sham referenced improvements in secondary outcomes occurred in the L-OFC arm, and to a lesser extent with SMA stimulation. CONCLUSIONS tDCS was acceptable, practicable to apply, well-tolerated and appears a promising potential treatment for OCD. The L-OFC represents the most promising target based on clinical changes, though the effects on OCD symptoms were not statistically significant compared to sham. SMA stimulation showed lesser signs of promise. Further investigation of tDCS in OCD is warranted, to determine the optimal stimulation protocol (current, frequency, duration), longer-term effectiveness and brain-based mechanisms of effect. If efficacy is substantiated, consideration of home-based approaches represents a rational next step. TRIAL REGISTRATION ISRCTN17937049. https://doi.org/10.1186/ISRCTN17937049.
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Affiliation(s)
- Naomi A Fineberg
- Hertfordshire Partnership NHS University Foundation Trust, Highly Specialised OCD and BDD Service, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK; School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK; Clinical Medical School, University of Cambridge, UK
| | - Eduardo Cinosi
- Hertfordshire Partnership NHS University Foundation Trust, Highly Specialised OCD and BDD Service, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK; School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - Megan V A Smith
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK.
| | - Amanda D Busby
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - David Wellsted
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - Nathan T M Huneke
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK; Southern Health NHS Foundation Trust, Tatchbury Mount, Southampton, UK
| | - Kabir Garg
- The Lishman Unit, South London and Maudsley NHS Foundation Trust, UK
| | - Ibrahim H Aslan
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Arun Enara
- Camden and Islington NHS Foundation Trust, London, UK
| | - Matthew Garner
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK; School of Psychology, University of Southampton, Southampton, UK
| | - Robert Gordon
- Southern Health NHS Foundation Trust, Tatchbury Mount, Southampton, UK
| | - Natalie Hall
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - Daniel Meron
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK; Somerset NHS Foundation Trust, Taunton, Somerset, UK
| | | | - Solange Wyatt
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - Luca Pellegrini
- Hertfordshire Partnership NHS University Foundation Trust, Highly Specialised OCD and BDD Service, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK; School of Life and Medical Sciences, University of Hertfordshire, Hatfield, Hertfordshire, UK
| | - David S Baldwin
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK; Southern Health NHS Foundation Trust, Tatchbury Mount, Southampton, UK; University Department of Psychiatry and Mental Health, University of Cape Town, South Africa
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Pinto BS, Cavendish BA, da Silva PHR, Suen PJC, Marinho KAP, Valiengo LDCL, Vanderhasselt MA, Brunoni AR, Razza LB. The Effects of Transcranial Direct Current Stimulation in Obsessive-Compulsive Disorder Symptoms: A Meta-Analysis and Integrated Electric Fields Modeling Analysis. Biomedicines 2022; 11:80. [PMID: 36672588 PMCID: PMC9855366 DOI: 10.3390/biomedicines11010080] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/23/2022] [Accepted: 11/01/2022] [Indexed: 12/31/2022] Open
Abstract
Transcranial direct current stimulation (tDCS) has been showing promising effects for the treatment of obsessive-compulsive disorder (OCD), but there is still no conclusion on its efficacy for this disorder. We performed a systematic review and meta-analysis of trials using tDCS for OCD and a computer modeling analysis to evaluate the electric field (EF) strengths of different electrode assemblies in brain regions of interest (ROIs) (PROSPERO-42021262465). PubMed/MEDLINE, Embase, Cochrane Library and Web of Science databases were searched from inception to 25 September 2022. Randomized controlled trials (RCTs) and open-label studies were included. The primary aim was the effect size (Hedges' g) of continuous outcomes and potential moderators of response. For EF modeling, SimNIBS software was used. Four RCTs and four open-label trials were included (n = 241). Results revealed a large effect of tDCS in the endpoint, but no significant effect between active and sham protocols. No predictor of response was found. EF analysis revealed that montages using the main electrode over the (pre)supplementary motor area with an extracephalic reference electrode might lead to stronger EFs in the predefined ROIs. Our results revealed that tDCS might be a promising intervention to treat OCD; however, larger studies are warranted.
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Affiliation(s)
- Bianca Silva Pinto
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Beatriz Araújo Cavendish
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Pedro Henrique Rodrigues da Silva
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Paulo Jeng Chian Suen
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Kalian Almeida Pereira Marinho
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Programa de Fisiopatologia Experimental, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Leandro da Costa Lane Valiengo
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Programa de Fisiopatologia Experimental, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Laboratório de Neurociências (LIM-27), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Marie-Anne Vanderhasselt
- Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Corneel Heymanslaan, 9000 Ghent, Belgium
- Ghent Experimental Psychiatry (GHEP) Lab, 9000 Ghent, Belgium
| | - André Russowsky Brunoni
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Laboratório de Neurociências (LIM-27), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Departamento de Clínica Médica, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
| | - Laís Boralli Razza
- Serviço Interdisciplinar de Neuromodulação (SIN), Instituto de Psiquiatria do Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo 05403-903, Brazil
- Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Corneel Heymanslaan, 9000 Ghent, Belgium
- Ghent Experimental Psychiatry (GHEP) Lab, 9000 Ghent, Belgium
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5
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Gao T, Du J, Tian S, Liu W. A meta-analysis of the effects of non-invasive brain stimulation on obsessive-compulsive disorder. Psychiatry Res 2022; 312:114530. [PMID: 35378452 DOI: 10.1016/j.psychres.2022.114530] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 03/26/2022] [Accepted: 03/26/2022] [Indexed: 12/25/2022]
Affiliation(s)
- Tangyu Gao
- Department of Psychiatry, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Jian Du
- Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu, China
| | - Shiqi Tian
- Department of Psychiatry, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Wei Liu
- Department of Psychiatry, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
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Adams TG, Cisler JM, Kelmendi B, George JR, Kichuk SA, Averill CL, Anticevic A, Abdallah CG, Pittenger C. Transcranial direct current stimulation targeting the medial prefrontal cortex modulates functional connectivity and enhances safety learning in obsessive-compulsive disorder: Results from two pilot studies. Depress Anxiety 2022; 39:37-48. [PMID: 34464485 PMCID: PMC8732293 DOI: 10.1002/da.23212] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 06/29/2021] [Accepted: 07/09/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Exposed-based psychotherapy is a mainstay of treatment for obsessive-compulsive disorder (OCD) and anxious psychopathology. The medial prefrontal cortex (mPFC) and the default mode network (DMN), which is anchored by the mPFC, promote safety learning. Neuromodulation targeting the mPFC might augment therapeutic safety learning and enhance response to exposure-based therapies. METHODS To characterize the effects of mPFC neuromodulation on functional connectivity, 17 community volunteers completed resting-state functional magnetic resonance imaging scans before and after 20 min of frontopolar anodal multifocal transcranial direct current stimulation (tDCS). To examine the effects of tDCS on therapeutic safety learning, 24 patients with OCD completed a pilot randomized clinical trial; they were randomly assigned (double-blind, 50:50) to receive active or sham frontopolar tDCS before completing an in vivo exposure and response prevention (ERP) challenge. Changes in subjective emotional distress during the ERP challenge were used to index therapeutic safety learning. RESULTS In community volunteers, frontal pole functional connectivity with the middle and superior frontal gyri increased, while connectivity with the anterior insula and basal ganglia decreased (ps < .001, corrected) after tDCS; functional connectivity between DMN and salience network also decreased after tDCS (ps < .001, corrected). OCD patients who received active tDCS exhibited more rapid therapeutic safety learning (ps < .05) during the ERP challenge than patients who received sham tDCS. CONCLUSIONS Frontopolar tDCS may modulate mPFC and DMN functional connectivity and can accelerate therapeutic safety learning. Though limited by small samples, these findings motivate further exploration of the effects of frontopolar tDCS on neural and behavioral targets associated with exposure-based psychotherapies.
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Affiliation(s)
- Thomas G Adams
- Department of Psychology, University of Kentucky, Lexington, Kentucky, USA
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Clinical Neuroscience Division of the National Center for PTSD, West Haven VA Medical Center, Yale University, New Haven, Connecticut, USA
| | - Josh M Cisler
- Department of Psychiatry, University of Wisconsin, Madison, Wisconsin, USA
- Department of Psychiatry & Behavioral Sciences, Dell Medical School, University of Texas, Austin, Texas, USA
| | - Benjamin Kelmendi
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Clinical Neuroscience Division of the National Center for PTSD, West Haven VA Medical Center, Yale University, New Haven, Connecticut, USA
| | - Jamilah R George
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Department of Psychological Sciences, University of Connecticut, Mansfield, Connecticut, USA
| | - Stephen A Kichuk
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Christopher L Averill
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Clinical Neuroscience Division of the National Center for PTSD, West Haven VA Medical Center, Yale University, New Haven, Connecticut, USA
- Michael E. DeBakey VA Medical Center, Houston, Texas, USA
- Menninger Department of Psychiatry, Baylor College of Medicine, Houston, Texas, USA
| | - Alan Anticevic
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Chadi G Abdallah
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Clinical Neuroscience Division of the National Center for PTSD, West Haven VA Medical Center, Yale University, New Haven, Connecticut, USA
- Michael E. DeBakey VA Medical Center, Houston, Texas, USA
- Menninger Department of Psychiatry, Baylor College of Medicine, Houston, Texas, USA
| | - Christopher Pittenger
- Department of Psychiatry, School of Medicine, Yale University, New Haven, Connecticut, USA
- Child Study Center, Yale University, New Haven, Connecticut, USA
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7
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Cinosi E, Adam D, Aslan I, Baldwin D, Chillingsworth K, Enara A, Gale T, Garg K, Garner M, Gordon R, Hall N, Huneke NTM, Kucukterzi-Ali S, McCarthy J, Meron D, Monji-Patel D, Mooney R, Robbins T, Smith M, Sireau N, Wellsted D, Wyatt S, Fineberg NA. Feasibility and acceptability of transcranial stimulation in obsessive-compulsive symptoms (FEATSOCS): study protocol for a randomised controlled trial of transcranial direct current stimulation (tDCS) in obsessive-compulsive disorder (OCD). Pilot Feasibility Stud 2021; 7:213. [PMID: 34872621 PMCID: PMC8646008 DOI: 10.1186/s40814-021-00945-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 11/01/2021] [Indexed: 11/30/2022] Open
Abstract
Background Obsessive–compulsive disorder (OCD) is a neuropsychiatric disorder which often proves refractory to current treatment approaches. Transcranial direct current stimulation (tDCS), a noninvasive form of neurostimulation, with potential for development as a self-administered intervention, has shown potential as a safe and efficacious treatment for OCD in a small number of trials. The two most promising stimulation sites are located above the orbitofrontal cortex (OFC) and the supplementary motor area (SMA). Methods The aim of this feasibility study is to inform the development of a definitive trial, focussing on the acceptability, safety of the intervention, feasibility of recruitment, adherence and tolerability to tDCS and study assessments and the size of the treatment effect. To this end, we will deliver a double-blind, sham-controlled, crossover randomised multicentre study in 25 adults with OCD. Each participant will receive three courses of tDCS (SMA, OFC and sham), randomly allocated and given in counterbalanced order. Each course comprises four 20-min stimulations, delivered over two consecutive days, separated by at least 4 weeks’ washout period. We will collect information about recruitment, study conduct and tDCS delivery. Blinded raters will assess clinical outcomes before, during and up to 4 weeks after stimulation using validated scales. We will include relevant objective neurocognitive tasks, testing cognitive flexibility, motor disinhibition, cooperation and habit learning. Discussion We will analyse the magnitude of the effect of the interventions on OCD symptoms alongside the standard deviation of the outcome measure, to estimate effect size and determine the optimal stimulation target. We will also measure the duration of the effect of stimulation, to provide information on spacing treatments efficiently. We will evaluate the usefulness and limitations of specific neurocognitive tests to determine a definitive test battery. Additionally, qualitative data will be collected from participants to better understand their experience of taking part in a tDCS intervention, as well as the impact on their overall quality of life. These clinical outcomes will enable the project team to further refine the methodology to ensure optimal efficiency in terms of both delivering and assessing the treatment in a full-scale trial. Trial registration ISRCTN17937049. (date applied 08/07/2019). Recruitment (ongoing) began 23rd July 2019 and is anticipated to complete 30th April 2021.
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Affiliation(s)
- Eduardo Cinosi
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK. .,University of Hertfordshire, Hertfordshire, UK.
| | - David Adam
- ORCHARD-Advancing Global OCD Research Charity, Cambridge, UK
| | - Ibrahim Aslan
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK
| | - David Baldwin
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK
| | - Kieran Chillingsworth
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK
| | - Arun Enara
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK
| | - Tim Gale
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK.,University of Hertfordshire, Hertfordshire, UK
| | - Kabir Garg
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK
| | - Matthew Garner
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK
| | - Robert Gordon
- Southern Health NHS Foundation Trust, Southampton, UK
| | | | - Nathan T M Huneke
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK.,Southern Health NHS Foundation Trust, Southampton, UK
| | - Sonay Kucukterzi-Ali
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK.,University of Hertfordshire, Hertfordshire, UK
| | | | - Daniel Meron
- Faculty of Medicine, Clinical and Experimental Sciences (CNS and Psychiatry), University of Southampton, Southampton, UK.,Somerset NHS Foundation Trust, Taunton, UK
| | - Deela Monji-Patel
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK.,University of Hertfordshire, Hertfordshire, UK
| | | | - Trevor Robbins
- Department of Psychology, Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Megan Smith
- University of Hertfordshire, Hertfordshire, UK
| | - Nick Sireau
- ORCHARD-Advancing Global OCD Research Charity, Cambridge, UK
| | | | | | - Naomi A Fineberg
- Highly Specialised OCD and BDD Service, Hertfordshire Partnership NHS University Foundation Trust, Rosanne House, Parkway, Welwyn Garden City, Hertfordshire, UK.,University of Hertfordshire, Hertfordshire, UK.,Department of Psychology, Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
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