Improving Obsessive-compulsive Disorder Treatments: From Lesions to Neuromodulation Targets (ON-TARGET)
While in most cases of obsessive-compulsive disorder (OCD) a cause cannot be identified, this syndrome may develop as a consequence of focal brain lesions. Neuropsychiatric disorders secondary to brain insults are open windows to understand their underlying neurobiology. Different neuroimaging analysis methods, including pooled lesion topography and lesion network mapping, can be used to study lesional neuropsychiatric syndromes, including OCD. If successful, these strategies can also reveal new neuromodulation treatment targets, including for transcranial magnetic stimulation (TMS). Indeed, TMS targets to treat depression evolved from evidence extracted from lesional studies that were then refined and validated. For OCD treatment with TMS, already approved by the FDA and European Commission, targets were defined using a distinct approach, not involving causal brain lesions, which may contribute to lower than desirable remission rates. Lesional OCD is characterized by specific dysfunctional brain circuits. These circuits may be effectively targeted by TMS, which may optimize treatment of OCD. To address these hypotheses, we will test the therapeutic benefits of optimizing brain targets for the currently used TMS treatment of OCD, using information from the lesional-OCD brain network namely refining the target in the medial orbitofrontal cortex, bilaterally. Specifically, we will conduct a randomized clinical interventional study, using TMS to treat patients with OCD with inadequate response to other treatments, comparing, within the approved protocol for OCD treatment, the most frequently used stimulation site with a new target, adjusted according to the connectivity of lesions associated with the occurrence of OCD. If successful, our results may have immediate clinical implications in OCD treatment, as it will contribute to refine current therapeutic TMS strategies for OCD and defining new clinical research strategies in this domain.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
In this study, we hypothesize that the cortical region identified from connectivity networks associated with lesional OCD may be a more effective TMS stimulation site than the one currently used in OCD treatment. Thus, we intend to compare the efficacy of the TMS protocol as approved for OCD, between its application at the currently used stimulation site (bilateral dorsomedial prefrontal cortex) and its application at an adjusted stimulation site, according to the more specific cortical areas of dysfunctional circuits associated with lesional OCD, namely the bilateral medial orbitofrontal cortex (OFC) region.
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.
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Lisbon, Portugal, 1400-038
- Champalimaud Foundation
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Age between 18 and 75 years;
- 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:
- Obsessive-compulsive symptoms severity assessed at baseline visit with the instrument Yale-Brown Obsessive Compulsive Scale - II (YBOCS-II) ≤ 24;
- 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.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Verdreifachen
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
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Aktiver Komparator: 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. |
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.
Andere Namen:
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 (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.
Andere Namen:
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Experimental: 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. |
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.
Andere Namen:
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 (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.
Andere Namen:
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Yale-Brown Obsessive Compulsive Scale - II (YBOCS-II)
Zeitfenster: Before and after TMS treatment cycle. The latter will be considered the primary endpoint (end-of-study visit) and will occur preferably between 2-3 weeks after last TMS session.
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Assessment instrument for the severity of OCD symptoms; scores can range from 0-50; higher scores mean worse outcome. |
Before and after TMS treatment cycle. The latter will be considered the primary endpoint (end-of-study visit) and will occur preferably between 2-3 weeks after last TMS session.
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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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State Trait Anxiety Inventory (STAI)
Zeitfenster: Before and after TMS treatment cycle. The latter will be considered the primary endpoint (end-of-study visit) and will occur preferably between 2-3 weeks after last TMS session.
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Self-report instrument that measures anxiety in the dimensions of state anxiety and trait anxiety that often occur in comorbidity with OCD symptoms; scores for both state anxiety and trait anxiety can range from 20-80; higher scores mean worse outcome for both state anxiety and trait anxiety. |
Before and after TMS treatment cycle. The latter will be considered the primary endpoint (end-of-study visit) and will occur preferably between 2-3 weeks after last TMS session.
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Beck Depression Inventory II (BDI-II)
Zeitfenster: Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Self-report scale that measures the severity of depressive symptoms often occurring in comorbidity with OCD symptoms; scores can range from 0-63; higher scores mean worse outcome. |
Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Obsessive-Compulsive Inventory - Revised (OCI-R)
Zeitfenster: Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Self-report scale that allows the assessment of dimensions present in OCD; scores can range from 0-72; higher scores mean worse outcome. |
Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Young Mania Rating Scale (YMRS)
Zeitfenster: Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Assessment instrument for the severity of manic symptoms, a possible neuropsychiatric adverse effect of TMS; scores can range from 0-60; higher scores mean worse outcome. |
Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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World Health Organization Five Well-Being Index (WHO-5)
Zeitfenster: Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Self-report scale that measures subjective quality of life based on mood, vitality, and interest in things in general; scores can range from 0-25; higher scores mean better outcome. |
Before TMS treatment cycle. Every 5 TMS treatment cycle visits (1st, 6th, 11th, 16th, 21st, and 26th visits). After TMS treatment cycle, i.e., 2-3 weeks after last TMS session.
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Albino J. Oliveira-Maia, MD, MPH, PhD, Champalimaud Foundation
- Hauptermittler: Gonçalo Cotovio, MD, PhD, Champalimaud Foundation
Publikationen und hilfreiche Links
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Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Psychische Störungen
- Angststörungen
- Zwangsstörung
- Untersuchungstechniken
- Therapeutika
- Chirurgische Eingriffe, operativ
- Chemie -Techniken, analytisch
- Spektrumanalyse
- Magnetfeldtherapie
- Stereotaktische Techniken
- Neurochirurgische Verfahren
- Operation, computergestützt
- Magnetresonanzspektroskopie
- Transkranielle magnetische Stimulation
- Neuronavigation
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- ON-TARGET
- 31379 (Andere Zuschuss-/Finanzierungsnummer: 2023 NARSAD Young Investigator Grant, BBRF)
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Beschreibung des IPD-Plans
To date there is no plan to make individual participant data (IPD) available to other researchers.
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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