Repetitive Transcranial Magnetic Stimulation (rTMS) in the Treatment of First Rank Symptoms (FRS) on Schizophrenia (Schirang)

September 7, 2023 updated by: Assistance Publique - Hôpitaux de Paris

Repetitive Transcranial Magnetic Stimulation (rTMS) in the Treatment of First Rank Symptoms on Schizophrenia: Controlled, Randomised, Double Blind Trial

First rank symptoms are core symptoms of schizophrenia. the investigators want to offer an integrative approach to better understanding of the mechanisms involved in the first rank symptoms and therefore, in schizophrenia, as well as the neuronal modulation mechanisms obtained by rTMS. It will be to pass a functional magnetic resonance imaging (fMRI) at rest for healthy volunteers, and for patients before and after rTMS modulation, to view brain structures activated in the resting state network, and in order to study

  1. the difference of the resting-state network between healthy volunteers and people with schizophrenia,
  2. if the response to rTMS boost can be predicted by resting-state network of patients before treatment and
  3. if rTMS changes activations in the brain of patients. This will ultimately provide rTMS as a treatment of first rank symptoms.

Study Overview

Detailed Description

Schizophrenia is a common psychiatric disorder that affects approximately 1% of the general population. This disease can be described in three dimensions: disorganization, delusions and negative signs. The "first rank symptoms" (FRS) were first described by Kurt Schneider. These are core symptoms of schizophrenia that were combined to make pathognomonic signs of the disease and remain at the center of many classifications of the disease. These symptoms are voices or thoughts expressed aloud, voices who argue them, voices that comment on behavior or thoughts, delusional perceptions, experiences of body influences, thoughts influences, impulses from external influences, the will controlled by external forces, thoughts stolen by external forces or others, thoughts interferences by other thoughts, publication thoughts. These symptoms reveal difficulty in distinguishing self and other in action, thought or physical individual. Thus, the FRS are a gateway to agency disorder, disorder of the sense of body ownership and familiarity disorder.

Agency is the ability to distinguish ones own actions from those of others. The sense of body ownership is difficult to distinguish from the sense of agency. It is the knowledge that the arm (for example) which make this action is mine. A disorder of sense of body ownership may lead to the illusion of a phantom limb and it is very interesting to separate both mechanisms of body ownership and agency as wall as the networks involved in agency of those involved in the sense of body ownership. Familiarity is the feeling associated with the sight of someone close. Thus, in familiarity disorder, patient recognizes the facial features of relatives, but feels no sense of familiarity and attributes this to the replacement of the close by an impostor. Familiarity disorders can be understood through the 2-ways model of faces of processing in which the ventral pathway would be affected in the familiarity disorder. The ventral pathway involves a network which extends from the visual cortex to the superior temporal sulcus, the inferior parietal lobe and the cingulate gyrus to join the dorsal pathway in the hypothalamus.

In addition, agency studies imply the superior temporal sulcus and the inferior parietal lobule as regions involved in distinguishing self / others. Nowadays, remains a difficulty to clearly identify the different functions of the regions involved in agency.

Few neuroimaging studies can identify key areas of the sense of body ownership; in fact, protocols are difficult to adapt for use in a scanner. However, there are few studies that highlight, as was expected, extrastriatal body area as well as areas that may be involved in agency. Experiments have difficulty differentiating, as the investigators said, the sense of body ownership from agency, but the investigators have a validated tool, the rubber hand illusion, to differentiate sense of body ownership and agency. This tool has already been validated in healthy subjects , and was the subject of a study in our unit on patients with schizophrenia about to be published. In addition, several studies have shown that the performance at the rubber hand illusion task were modified by repeated Transcranial Magnetic Stimulation (rTMS) applied to the extrastriatal body area (EBA) or to the inferior parietal lobule (IPL) or to the temporo-parietal junction (TPJ).

Transcranial magnetic stimulation or TMS modulate cortical excitability without serious side effects when used at frequencies and intensities recommended in the literature. Low frequency rTMS is a recognized for treatment-resistant auditory hallucinations in schizophrenia. This is therefore an interesting therapeutic innovation that will benefit to residual symptoms, in adjunction to a well conducted medical treatment in schizophrenia.

To our knowledge, no study has been performed using rTMS as a treatment for FRS in schizophrenia. The investigators propose to evaluate the impact of treatment with low-frequency rTMS applied to the superior temporal sulcus in its posterior part (pSTS) on disorders of agency and familiarity. Indeed, it is well established that low-frequency rTMS (1 Hz) of the left TPJ was used to reduce auditory hallucinations in schizophrenia. On the same model, the investigators want to offer an innovative and integrative treatment of core symptoms of schizophrenia with the specificity of not focusing on a single symptom. The choice of pSTS allows also operating on the sense of body ownership inasmuch the TPJ is adjacent to the pSTS.

In addition, in order to have a more comprehensive study incorporating different aspects of the pathophysiology of schizophrenia, the investigators want to add a functional magnetic resonance imaging (fMRI) of resting-state. This would be to pass a fMRI for healthy volunteers. For people with schizophrenia, they will pass a fMRI before and after treatment for visualizing brain structures activated in the resting-state network, in order to study

  1. the difference in resting-state circuitry between healthy volunteers and schizophrenia patients
  2. whether the response to treatment with rTMS could be predicted by resting-state network of patients before treatment and
  3. whether treatment with rTMS could modulate brain activations of patients.

Indeed, the resting-state network is the brain activity that occurs when a subject leaves his mind at rest without any particular task. Self-awareness is involved in this resting-state network. This network involves bilateral structures with the main nodes in medial prefrontal cortex, posterior cingulate cortex, precuneus and angular gyrus. People with schizophrenia exhibit connectivity anomalies in the resting-state network that are temporal connection anomalies. In acoustico-verbal hallucinations, people with schizophrenia have a resting-state network particularly active in the auditory cortex. Authors have proposed that this hyperactivity of the auditory cortex in the resting-state network would make patients more vulnerable to attribute external stimuli to them.

Similarly, it can be postulated that patients with FRS would have a hyperactivity of the resting-state network especially in the pSTS and the TPJ, which would lead to a difficulty in distinguishing oneself and others and thus, to FRS. Thus, the investigators hypothesize that patients with abnormal functional connectivity in the resting-state network (mainly in the pSTS and TPJ, which the investigators will then be boost in rTMS) will have a better response to treatment and that, after rTMS treatment, a change will be visible on neuronal activation of resting-state network in fMRI.

Study Type

Interventional

Enrollment (Actual)

31

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

      • Colombes, France, 92700
        • Louis Mourier

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Suffering from schizophrenia (according to DSM IV-TR)
  • Presenting FRS at least once a day despite well-conducted antipsychotic treatment, objectified by FRS subscore of the SAPS (items 2, 3 and items 15-19) with at least two FRS listed > 1 of the corresponding item of the SAPS
  • Being informed of the objectives and constraints of the study and signing the consent form or signing by the guardian
  • Patient having had a preliminary clinical examination

Exclusion Criteria:

  • Left-lateralized
  • Previously treated with rTMS in the previous 6 month,
  • Contraindications of the rTMS practice: unstabilized epilepsy, presence of foreign eye metallic material, pacemaker, neurostimulator, cochlear implants and in general all medical equipment installed immovably, metal heart valve, vascular clips formerly located on cranial aneurysm
  • Pregnancy or breastfeeding women
  • hospitalization under constraint
  • Subject already involved in another interventional clinical research evaluating schizophrenia treatment
  • patient with severe drug use disorder (excluding coffee and tobacco) according to the DSM-5 criteria

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: rTMS treatment
patient will be treated with 10 sessions in 5 days with low frequency (1Hz) of Repetitive Transcranial Magnetic Stimulation (rTMS)
patient will be treated with 10 sessions in 5 days with low frequency (1Hz) of Repetitive Transcranial Magnetic Stimulation (rTMS)
Other Names:
  • intervention
Sham Comparator: Placebo treatment
patient will be treated with 10 sessions in 5 days with low frequency (1Hz) of Sham-controlled
patient will be treated with 10 sessions in 5 days with low frequency (1Hz) of Sham-controlled
Other Names:
  • placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluation of first rank symptoms
Time Frame: 5 days after inclusion
Number of first rank symptoms measured by items 2,3 and 15 to 19 of "first rank" subscore from SAPS
5 days after inclusion

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluation of both agency and sense of body ownership disorders with Rubber Hand Illusion test (RHI)
Time Frame: 5 days, 1 month and 3 months after inclusion

RHI Test is composite evaluation . A wooden hand will be placed in front of the subject while his proper hand rests, hidden from his vision. When applying identical and synchronous active movement to both the wooden and the subject hidden hand, subject feels rapidly as moving directly to the rubber hand level, and develops a sense of ownership to this artificial hand.

  1. The intensity of the illusion is measured subjectively by answering a questionnaire (over sense of one's own body and agency).
  2. The intensity of the illusion is measured objectively by measuring proprioceptive bias in millimeters after each stimulation by asking the subject to place his own hand after illusion induction.
5 days, 1 month and 3 months after inclusion
Evaluation of familiarity disorder
Time Frame: 5 days, 1 and 3 month after inclusion
Face morphing tasks have been used for a decade to identify facial recognition defects and allow calculating a recognition threshold (percentage of the faces morphed required for recognition). This threshold may be compared over time. Faces are morphed between the subject's face with same sex pictures either familiar (2 persons close to the patient) or unfamiliar (two faces from a database34). The subjects indicate when they recognize their relative or when a stranger emerges during computer presentation of morphed images, to a varying extent from 0 to 100% (by 10% step). A threshold of recognition per conditions (self, familiar, unknown) will be extract for each subject as a percentage
5 days, 1 and 3 month after inclusion
Evaluation of the severity of symptoms
Time Frame: 5 days, 1 and 3 month after inclusion
use of the Positive And Negative Symptoms Scale PANSS, an hetero evaluation of schizophrenia symptoms
5 days, 1 and 3 month after inclusion
Evaluation of the functioning
Time Frame: 5 days, 1 and 3 month after inclusion
By using the Global Assessment of Functioning (GAF)
5 days, 1 and 3 month after inclusion
Evaluation of quality of life
Time Frame: 5 days, 1 and 3 month after inclusion
By using the Shortened Quality of Life Questionnaire (S-QoL 18)
5 days, 1 and 3 month after inclusion
Evaluation of the side effects
Time Frame: 5 days after inclusion
By using the Side effects surveillance (UKU)
5 days after inclusion

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Aurely Ameller, MD, PhD, Assistance Publique - Hôpitaux de Paris

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 3, 2018

Primary Completion (Actual)

March 2, 2023

Study Completion (Actual)

March 3, 2023

Study Registration Dates

First Submitted

September 6, 2017

First Submitted That Met QC Criteria

September 11, 2017

First Posted (Actual)

September 15, 2017

Study Record Updates

Last Update Posted (Actual)

September 8, 2023

Last Update Submitted That Met QC Criteria

September 7, 2023

Last Verified

September 1, 2023

More Information

Terms related to this study

Other Study ID Numbers

  • P150906 / AOR 15085

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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