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Improving Obsessive-compulsive Disorder Treatments: From Lesions to Neuromodulation Targets (ON-TARGET)

2026년 10월 1일 업데이트: Fundacao Champalimaud

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.

연구 개요

상세 설명

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.

연구 유형

중재적

등록 (추정된)

32

단계

  • 해당 없음

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 장소

      • Lisbon, 포르투갈, 1400-038
        • Champalimaud Foundation

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

18년 (성인, 고령자)

건강한 자원 봉사자를 받아들입니다

아니

연구 대상 성별

모두

설명

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.

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 병렬 할당
  • 마스킹: 삼루타

무기와 개입

참가자 그룹 / 팔
개입 / 치료
활성 비교기: 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.

다른 이름들:
  • TMS
  • rTMS
  • 비침습적 뇌 자극

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.

다른 이름들:
  • MRI
실험적: 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.

다른 이름들:
  • TMS
  • rTMS
  • 비침습적 뇌 자극

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.

다른 이름들:
  • MRI

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Yale-Brown Obsessive Compulsive Scale - II (YBOCS-II)
기간: 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.

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.

2차 결과 측정

결과 측정
측정값 설명
기간
State Trait Anxiety Inventory (STAI)
기간: 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.

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.
Beck Depression Inventory II (BDI-II)
기간: 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.

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.
Obsessive-Compulsive Inventory - Revised (OCI-R)
기간: 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.

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.
Young Mania Rating Scale (YMRS)
기간: 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.

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.
World Health Organization Five Well-Being Index (WHO-5)
기간: 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.

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.

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

수사관

  • 수석 연구원: Albino J. Oliveira-Maia, MD, MPH, PhD, Champalimaud Foundation
  • 수석 연구원: Gonçalo Cotovio, MD, PhD, Champalimaud Foundation

간행물 및 유용한 링크

연구에 대한 정보 입력을 담당하는 사람이 자발적으로 이러한 간행물을 제공합니다. 이것은 연구와 관련된 모든 것에 관한 것일 수 있습니다.

일반 간행물

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (실제)

2024년 11월 7일

기본 완료 (추정된)

2026년 12월 31일

연구 완료 (추정된)

2026년 12월 31일

연구 등록 날짜

최초 제출

2024년 7월 1일

QC 기준을 충족하는 최초 제출

2024년 7월 1일

처음 게시됨 (실제)

2024년 7월 8일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 10월 5일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 10월 1일

마지막으로 확인됨

2026년 8월 1일

추가 정보

이 연구와 관련된 용어

개별 참가자 데이터(IPD) 계획

개별 참가자 데이터(IPD)를 공유할 계획입니까?

아니요

IPD 계획 설명

To date there is no plan to make individual participant data (IPD) available to other researchers.

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

구독하다