Improving Obsessive-compulsive Disorder Treatments: from Lesions to Neuromodulation Targets
NCT ID: NCT06490965
Last Updated: 2024-11-18
Study Results
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Basic Information
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RECRUITING
NA
32 participants
INTERVENTIONAL
2024-11-07
2026-12-31
Brief Summary
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Detailed Description
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The participants in this study will be recruited at the Champalimaud Foundation. The physicians on the research team will identify patients who are being treated for OCD in the Neuropsychiatry Unit, or who are referred to the unit for this purpose. In this study, we aim to prospectively recruit 32 individuals according to the eligibility criteria specified in the respective section.
We propose to conduct a randomized, double-blinded interventional study, open only to the technician administering the treatment. After agreeing to participate in the study, the participant will be invited to attend the first study visit. There, participants will be assigned a unique identification number to maintain their anonymity in the study. Then, a qualified team member will ask the participant to complete the sociodemographic and clinical questionnaire to confirm the conditions for TMS and MRI, including an appropriate screening tool for the occurrence of seizures and/or epilepsy. The Mini International Neuropsychiatric Interview (MINI) and he Structured Clinical Interview for Diagnostic and statistical manual of mental disorders (SCID) will serve the purpose of verifying the eligibility criteria of the study participant, including confirmation of the OCD diagnosis, using SCID. After confirming their eligibility, the participant will be invited to complete the remaining psychometric assessment, which will reflect the baseline values of each instrument. The following will be assessed: YBOCS-II (primary outcome), BDI-II, OCI-R, STAI, World Health Organization Five Well-Being Index (WHO-5), and YMRS (secondary outcomes), and Edinburgh Handedness Inventory (EHI).
In this study, to ensure that the TMS target site used is precisely located, we will use neuronavigation in each TMS session performed. Thus, in the next step of the first visit, the participant will be invited to undergo an MRI scan. This procedure cannot be waived, as without the MRI scan of each individual, the appropriate use of neuronavigation is compromised. If the participant cannot or does not want to undergo this procedure, they will be excluded from the study. The MRI protocol will include the collection of structural and functional neuroimaging data. The duration of this neuroimaging exam will be approximately 20-30 minutes.
After completing this step, the participant will be randomized to one of the two study arms. Please see details of each study arm in the respective section. The first visit of the TMS treatment cycle will be scheduled later. During this first visit of the TMS treatment cycle, the motor hotspot and the motor excitability threshold will be determined, which will be subsequently used to define the appropriate treatment intensity for each individual. Finally, the stimulation site will be determined using the neuronavigation system utilizing each individual's MRI scan. It is emphasized that the stimulation site will be mandatory determined at all TMS treatment visits. The TMS protocol will then commence, characterized by 20 Hz frequency irrespective of study arm. At the beginning of each TMS treatment cycle visit, the presence of potential side effects since the last TMS session will be screened. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits), the following psychometric scales will be repeated at the beginning of each visit: BDI-II, WHO-5, OCI-R, and YMRS (secondary outcomes). Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits), the motor hotspot and the motor excitability threshold will be redefined, and consequently, the treatment stimulation intensity will be adjusted. At the end of each TMS treatment cycle visit, the next visit will be scheduled to occur on a daily basis, on business days, for a total of 30 visits. After the end of the TMS treatment cycle, the last study visit will be scheduled (primary endpoint, end-of-study visit), which should preferably occur between 2-3 weeks after the 30th TMS treatment cycle visit. During this visit, the YBOCS-II (primary outcome) will be applied. Participants will also be invited to undergo a new MRI scan, with the same characteristics as identified above.
Clinical efficacy will be assessed by changes in the severity of OCD symptoms compared to baseline, evaluated (using YBOCS-II; primary outcome) after 30 daily sessions of TMS, comparing the two study arms.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
TRIPLE
Study Groups
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Arm A
Standard of care rTMS protocol, i.e., daily frequency of repetitive excitatory TMS at 20 Hz of the medial prefrontal cortex - approximate duration of each session between 40-60 minutes.
Repetitive Transcranial Magnetic Stimulation
Transcranial Magnetic Stimulation (TMS) involves generating a magnetic field with specific spatial and temporal properties, allowing the induction of electric current in conductive material near this field. The electro-physiological principle of TMS is based on placing a coil over the skull that will induce a magnetic field generating action potentials in neuronal tissue in response to each TMS pulse. The repetitive application of TMS pulses (rTMS) allows for the modulation of neuronal excitability for a period after rTMS, ranging from inhibition, in the case of low frequencies (\~1 Hz), or facilitation if high frequencies (equal to or greater than 5 Hz) are used.
Neuronavigation
Neuronavigation is a non-invasive method that allows the creation of computerized three-dimensional models of brain structures based on neuroimaging exams of each individual (e.g., cranial magnetic resonance imaging). As such, this method has been used for various purposes, such as assisting in neurosurgery or mapping functional regions of the brain, but also in the context of TMS (Transcranial Magnetic Stimulation). In this latter area, its use as support for TMS has been employed for therapeutic, diagnostic, and research purposes. The neuronavigation system consists of several components, namely a locating camera, locators for the TMS coil, an adjustable headband with locators, a calibration system for these elements, and the neuronavigation software, which is installed on a supporting computer.
Magnetic Resonance Imaging
Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging technique that generates detailed images of the internal structures of the body using a strong magnetic field and radio waves. It provides high-resolution images of soft tissues, such as organs, muscles, and the brain, helping doctors diagnose and monitor various conditions, including injuries, tumors, and neurological disorders. MRI is particularly useful because it does not involve ionizing radiation, making it safer for patients than other imaging methods like X-rays or CT scans.
Arm B
Standard of care rTMS protocol, i.e., daily frequency of repetitive excitatory TMS at 20 Hz with adjustment of the stimulation site to primarily target the bilateral medial orbitofrontal cortex.
Repetitive Transcranial Magnetic Stimulation
Transcranial Magnetic Stimulation (TMS) involves generating a magnetic field with specific spatial and temporal properties, allowing the induction of electric current in conductive material near this field. The electro-physiological principle of TMS is based on placing a coil over the skull that will induce a magnetic field generating action potentials in neuronal tissue in response to each TMS pulse. The repetitive application of TMS pulses (rTMS) allows for the modulation of neuronal excitability for a period after rTMS, ranging from inhibition, in the case of low frequencies (\~1 Hz), or facilitation if high frequencies (equal to or greater than 5 Hz) are used.
Neuronavigation
Neuronavigation is a non-invasive method that allows the creation of computerized three-dimensional models of brain structures based on neuroimaging exams of each individual (e.g., cranial magnetic resonance imaging). As such, this method has been used for various purposes, such as assisting in neurosurgery or mapping functional regions of the brain, but also in the context of TMS (Transcranial Magnetic Stimulation). In this latter area, its use as support for TMS has been employed for therapeutic, diagnostic, and research purposes. The neuronavigation system consists of several components, namely a locating camera, locators for the TMS coil, an adjustable headband with locators, a calibration system for these elements, and the neuronavigation software, which is installed on a supporting computer.
Magnetic Resonance Imaging
Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging technique that generates detailed images of the internal structures of the body using a strong magnetic field and radio waves. It provides high-resolution images of soft tissues, such as organs, muscles, and the brain, helping doctors diagnose and monitor various conditions, including injuries, tumors, and neurological disorders. MRI is particularly useful because it does not involve ionizing radiation, making it safer for patients than other imaging methods like X-rays or CT scans.
Interventions
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Repetitive Transcranial Magnetic Stimulation
Transcranial Magnetic Stimulation (TMS) involves generating a magnetic field with specific spatial and temporal properties, allowing the induction of electric current in conductive material near this field. The electro-physiological principle of TMS is based on placing a coil over the skull that will induce a magnetic field generating action potentials in neuronal tissue in response to each TMS pulse. The repetitive application of TMS pulses (rTMS) allows for the modulation of neuronal excitability for a period after rTMS, ranging from inhibition, in the case of low frequencies (\~1 Hz), or facilitation if high frequencies (equal to or greater than 5 Hz) are used.
Neuronavigation
Neuronavigation is a non-invasive method that allows the creation of computerized three-dimensional models of brain structures based on neuroimaging exams of each individual (e.g., cranial magnetic resonance imaging). As such, this method has been used for various purposes, such as assisting in neurosurgery or mapping functional regions of the brain, but also in the context of TMS (Transcranial Magnetic Stimulation). In this latter area, its use as support for TMS has been employed for therapeutic, diagnostic, and research purposes. The neuronavigation system consists of several components, namely a locating camera, locators for the TMS coil, an adjustable headband with locators, a calibration system for these elements, and the neuronavigation software, which is installed on a supporting computer.
Magnetic Resonance Imaging
Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging technique that generates detailed images of the internal structures of the body using a strong magnetic field and radio waves. It provides high-resolution images of soft tissues, such as organs, muscles, and the brain, helping doctors diagnose and monitor various conditions, including injuries, tumors, and neurological disorders. MRI is particularly useful because it does not involve ionizing radiation, making it safer for patients than other imaging methods like X-rays or CT scans.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* Established diagnosis of Obsessive-Compulsive Disorder according to Diagnostic and statistical manual of mental disorders 5 (DSM5) criteria;
* Capacity to give consent;
* Fluent in Portuguese and/or English;
* If potential for pregnancy, agrees to use an effective method of contraception throughout the study period.
Exclusion Criteria
* Presence of uncontrolled active medical illness;
* Known structural lesion of the central nervous system;
* Electric or metallic implants in the body not compatible with electromagnetic radiation;
* Electric or metallic brain implants;
* Cardiac implants;
* Epilepsy;
* Pregnant, breastfeeding, or planning pregnancy women;
* Alcohol or substance abuse and/or dependence;
* Major Neurocognitive Disorder;
* Developmental disorders with low intelligence quotient or any other form of cognitive deficit;
* Active neurological disease;
* Individuals presenting with any psychotic or mood disorder requiring hospitalization at the time of eligibility criteria assessment;
* Contraindication for performing MRI;
* Individuals who have already been treated for OCD with TMS;
* Any other reason that renders the individual unable to provide informed consent.
18 Years
75 Years
ALL
No
Sponsors
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Fundacao Champalimaud
OTHER
Responsible Party
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Principal Investigators
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Gonçalo Cotovio, MD, PhD
Role: PRINCIPAL_INVESTIGATOR
Champalimaud Foundation
Albino J. Oliveira-Maia, MD, MPH, PhD
Role: PRINCIPAL_INVESTIGATOR
Champalimaud Foundation
Locations
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Champalimaud Foundation
Lisbon, , Portugal
Countries
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Central Contacts
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Facility Contacts
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Gonçalo Cotovio, MD, PhD
Role: backup
Albino J Oliveira-Maia, MD, MPH, PhD
Role: backup
References
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Other Identifiers
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31379
Identifier Type: OTHER_GRANT
Identifier Source: secondary_id
ON-TARGET
Identifier Type: -
Identifier Source: org_study_id
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