Study by 1H NMR of Blood Metabolome Changes During Electroconvulsive Therapy in Patients With Major Depressive Episode
Led by Hôpital le Vinatier · Updated on 2025-07-24
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52 weeks
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What this Trial Is About
Researchers are studying the changes in blood metabolome in patients undergoing electroconvulsive therapy (ECT) for a major depressive episode. This includes patients diagnosed with major depressive disorder or bipolar disorder who currently have a major depressive episode. The goal is to explore whether blood metabolome measured by proton nuclear magnetic resonance (1H NMR) can help predict patient response to ECT and better understand the biological mechanisms involved in this treatment.
Electroconvulsive therapy is given through electrodes placed on the frontotemporal region under anesthesia, with the stimulation dose set by titration during the first session. Patients typically receive 12 to 20 ECT sessions, twice a week. Blood samples are collected during anesthesia at multiple time points: before and after the first session, before the 6th, 12th, and last sessions. Alongside blood sampling, depression severity, perceived severity, global functioning, convulsive characteristics, and cognitive tolerance are assessed at each time.
Participants will be involved in regular clinical assessments including MADRS, BDI, CGI, EGF, and MOCA scales. Researchers will measure metabolic profile changes mainly between baseline and before the 6th ECT session, and observe variations over the course of treatment. Safety and cognitive function will be monitored throughout. The study duration may last up to 10 weeks, with repeated measurements to track biological effects and clinical responses to ECT.
CONDITIONS
Brief Title
Metabolomics During ElectroConvulsivoTherapy
Who Can Participate
Age: 18Years +
All Genders
Eligibility Criteria
You may qualify if you...
Have a major depressive episode according to DSM-5 criteria
Diagnosed with major depressive disorder or bipolar disorder
MADRS score greater than 22
Given written, free, and informed consent
Not under protective measures
Have failed at least two antidepressants at effective doses for at least 6 weeks
Currently indicated for ECT treatment for major depressive episode
You will not qualify if you...
Unable to give valid consent or refuse to participate
Deprived of liberty by judicial or administrative decision
Have specific risks that contraindicate ECT treatment
Diagnosed with schizophrenia spectrum disorders or persistent delusional disorder
Have neurological disorders such as multiple sclerosis, epilepsy, or encephalitis
Have neurodegenerative disorders such as Parkinson's disease or Alzheimer's disease
Suffer from acute or chronic systemic inflammatory diseases requiring immunomodulators or immunosuppressors
Have recurrent inflammatory diseases that may mimic depressive episodes as per DSM-5 criteria listed in major depressive disorder criterion C
Any other condition that contraindicates ECT or study participation as determined by investigators or DSM-5 criteria related to major depressive disorder exclusion factors listed above
Deprivation of consent or inability to participate due to legal reasons or refusal to participate in the study
Conditions posing particular risks against ECT cure, as judged by investigators or guidelines in DSM-5 criteria for major depressive disorder exclusions listed above
Other unspecified contraindications related to neurological, neurodegenerative, or inflammatory disorders as detailed above or judged by study personnel in line with DSM-5 criteria exclusions for major depressive disorder criterion C and D status exclusions stated above
Patients with schizophrenia spectrum or persistent delusional disorder diagnosis according to DSM-5 Criterion D for major depressive disorder
Patients with neurological or neurodegenerative disorders as per DSM-5 criterion C for major depressive disorder
Patients with systemic inflammatory diseases requiring specific treatments or recurrent inflammatory disease requiring management that may confound diagnosis of depressive episode as per DSM-5 criterion C for major depressive disorder
Patients deprived of liberty by judicial or administrative decision
Patients who cannot provide informed consent or refuse participation in the study
Patients contraindicated for ECT treatment due to particular risks or medical conditions as assessed by the investigators or DSM-5 criteria related to major depressive disorder exclusions above
Patients with acute or chronic systemic inflammatory diseases needing immunomodulatory or suppressive therapies
Patients with recurrent inflammatory diseases that could mimic depressive episodes according to DSM-5 criteria
Any other exclusion conditions described for major depressive disorder in DSM-5 criteria or judged by investigators for safety and appropriateness of ECT treatment or study participation
Patients refusing to participate or unable to provide valid consent
Patients under protective legal measures preventing participation
Patients with medical or psychiatric conditions contraindicating ECT as per DSM-5 criteria and investigator judgment
Patients with neurological, neurodegenerative, or inflammatory disorders described above that exclude participation in the study
Any other contraindications for ECT treatment as determined by study investigators or DSM-5 major depressive disorder exclusion criteria above
Patients with diagnoses or conditions that contraindicate study participation as specified in DSM-5 major depressive disorder exclusion criteria or by investigators' clinical judgment
Patients who are legally restricted from consenting or participating
Patients refusing study participation
Patients with risks contraindicating ECT treatment
Patients with schizophrenia spectrum or persistent delusional disorder diagnoses
Patients with neurological or neurodegenerative disorders
Patients with systemic inflammatory diseases requiring immunomodulatory treatment or recurrent inflammatory diseases
Patients with conditions that may mimic depressive episodes or contraindicate participation in the study
Patients deprived of liberty by judicial or administrative decision
Patients unable or unwilling to consent to the study
Patients contraindicated for ECT treatment due to medical or psychiatric risks
Patients with neurological, neurodegenerative, or inflammatory diseases as exclusion criteria
Patients refusing to participate or unable to consent
Patients legally deprived of liberty
Patients contraindicated for ECT cure due to risks
Patients with schizophrenia spectrum or persistent delusional disorder
Patients with neurological or neurodegenerative disorders
Patients with systemic or recurrent inflammatory diseases requiring treatment
Patients with conditions that may cause differential diagnosis issues
Patients deprived of liberty
Patients unable or unwilling to consent
Patients contraindicated for ECT due to risks
Patients with significant neurological, neurodegenerative, or inflammatory diseases
Patients refusing participation
Patients legally restricted or deprived of liberty
Patients with risks contraindicating ECT
Patients with schizophrenia spectrum or persistent delusional disorder
Patients with neurological or neurodegenerative disorders
Patients with systemic inflammatory diseases
Patients with recurrent inflammatory diseases
Patients with conditions mimicking depressive episodes
Patients deprived of liberty by judicial or administrative decision
Patients unable or unwilling to consent
Patients contraindicated for ECT
Patients with medical conditions as exclusion factors
Patients refusing participation
Patients legally deprived of liberty
Patients with risks contraindicating ECT
Patients with schizophrenia spectrum or persistent delusional disorder
Patients with neurological or neurodegenerative disorders
Patients with systemic or recurrent inflammatory diseases
Patients with differential diagnosis conditions
Patients deprived of liberty
Patients unable or unwilling to consent
Patients contraindicated for ECT
Patients refusing participation
Patients legally deprived of liberty
Patients contraindicated for ECT cure
Patients with schizophrenia spectrum or persistent delusional disorder
Patients with neurological or neurodegenerative disorders
Patients with systemic inflammatory diseases
Patients with recurrent inflammatory diseases
Patients with conditions causing differential diagnosis
Patients deprived of liberty
Patients unable or unwilling to consent
Patients contraindicated for ECT
Patients refusing participation
Patients deprived of liberty
Patients contraindicated for ECT
Patients with psychiatric or neurological disorders incompatible with study
Patients with inflammatory diseases requiring immunomodulatory treatment
Patients with conditions mimicking depressive episodes
Patients deprived of liberty
Patients unable to consent or refusing participation
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Your Study Journey
Screening
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Treatment
Duration - Up to 6 weeks (12 to 20 sessions)
Participants receive electroconvulsive therapy (ECT) with 2 sessions per week. Blood samples and clinical assessments are taken before and after sessions to monitor metabolic changes and clinical response.
Canadian Network for Mood and Anxiety Treatments (CANMAT) and International Society for Bipolar Disorders (ISBD) 2018 guidelines for the management of patients with bipolar disorder.
Lakshmi N Yatham, Sidney H Kennedy, Sagar V Parikh...