Electrophysiological Biomarkers in Accelerated TMS for Depression
Electrophysiological Biomarkers of Treatment Response in Major Depressive Disorder Patients Receiving Accelerated Transcranial Magnetic Stimulation
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Intervence / Léčba
Intervence / Léčba
Typ studie
Typ studie
Zápis (Aktuální)
Zápis
Fáze
Fáze
- Nelze použít
Kontakty a umístění
Studijní místa
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Bakırköy
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Istanbul, Bakırköy, Turecko (Türkiye)
- Istanbul University-Cerrahpaşa Cerrahpaşa Medical Faculty Psychiatry Department
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Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
- Starší dospělý
Přijímá zdravé dobrovolníky
Popis
Inclusion Criteria:
- Adults aged 18 to 65 years
- Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) diagnosis of major depressive disorder, of at least moderate severity, confirmed by structured psychiatric interview
- Insufficient response to at least one adequate trials of antidepressant pharmacotherapy during the current episode
- Stable psychotropic medication regimen for at least 4 weeks prior to enrollment
- Ability to provide written informed consent
Exclusion Criteria:
- Cardiac arrhythmia or use of antiarrhythmic medication
- Benzodiazepine use exceeding the equivalent of 1 mg/day lorazepam
- Active suicidal ideation
- Comorbid psychiatric disorders other than anxiety disorders (including bipolar disorder, psychotic disorders, substance use disorders, and primary obsessive-compulsive disorder)
- Standard contraindications to transcranial magnetic stimulation, including history of seizure, intracranial metal implants, cochlear implants, or implanted neurostimulators
- Pregnancy
- Severe or unstable medical illness
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: N/A
- Intervenční model: Přiřazení jedné skupiny
- Maskování: Žádné (otevřený štítek)
Počet zbraní
Zbraně a zásahy
Skupina účastníků / ArmSkupina účastníků / Arm |
Intervence / LéčbaIntervence / Léčba |
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Experimentální: Accelerated bilateral dmPFC-iTBS with double-cone coil
Participants received accelerated bilateral intermittent theta-burst stimulation (iTBS) targeting the dorsomedial prefrontal cortex (dmPFC) using a Cool DB-80 double-cone coil.
Treatment consisted of four sessions per day, delivering 1,200 pulses per session (600 pulses per hemisphere, applied sequentially to left and right dmPFC), at 120% of resting motor threshold.
The total course comprised 20 to 30 sessions over 5 to 8 days.
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Stimulation was delivered using a MagPro R30 stimulator equipped with a Cool DB-80 double-cone coil (MagVenture A/S, Farum, Denmark).
The stimulation site was localized using the 25% nasion-inion scalp heuristic for dorsomedial prefrontal cortex (dmPFC) targeting.
The intermittent theta-burst stimulation (iTBS) protocol consisted of triplet 50 Hz bursts repeated at 5 Hz, applied as 2-second trains with 8-second inter-train intervals.
Each session delivered 600 pulses sequentially to the left and right dmPFC (1,200 pulses per session), at a target intensity of 120% of the hemisphere-specific resting motor threshold.
Four sessions were delivered per day with approximately 50-minute inter-session intervals.
The total treatment course was 20 sessions over 5 days, extended to 30 sessions over 8 days for partial responders.
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Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
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Change in Hamilton Depression Rating Scale (HAMD-17) Score
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Depression severity was assessed using the 17-item Hamilton Depression Rating Scale (HAMD-17) at baseline and within 1 week after completion of the accelerated iTBS course.
The HAMD-17 is a clinician-administered scale; scores range from 0 to 52, with higher scores indicating more severe depression.
Treatment response was defined as a 50% or greater reduction from baseline HAMD-17 score, and remission as a post-treatment HAMD-17 score of 7 or lower.
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Baseline, Day 5, and Day 8 for extended courses
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Sekundární výstupní opatření
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
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Heart rate deceleration during stimulation
Časové okno: Through completion of the treatment course, up to 8 days
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Heart rate was continuously sampled at 1-second intervals using a Polar H10 chest strap during every stimulation session.
Heart rate deceleration (HRD) was calculated as the percentage reduction from the 1-minute pre-stimulation baseline heart rate to the mean stimulation heart rate, using the formula: HRD (%) = [(HR_baseline - HR_stimulation) / HR_baseline] x 100.
HRD was computed across four parameters (all left-sided sessions, all right-sided sessions, highest-intensity left-sided sessions, highest-intensity right-sided sessions) and averaged per participant.
Higher values indicate greater stimulation-induced heart rate deceleration.
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Through completion of the treatment course, up to 8 days
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Change in Beck Depression Inventory (BDI)
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Beck Depression Inventory (BDI), a self-report scale; total scores range from 0 to 63, with higher scores indicating more severe depression.
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Baseline, Day 5, and Day 8 for extended courses
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Change in Beck Anxiety Inventory (BAI)
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Beck Anxiety Inventory (BAI), a self-report scale; total scores range from 0 to 63, with higher scores indicating more severe anxiety.
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Baseline, Day 5, and Day 8 for extended courses
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Change in Beck Scale for Suicide Ideation (BSS)
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Beck Scale for Suicide Ideation (BSS), a self-report scale; total scores range from 0 to 38, with higher scores indicating greater suicidal ideation.
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Baseline, Day 5, and Day 8 for extended courses
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Change in Quick Inventory of Depressive Symptomatology - Self-Report (QIDS-SR16) Total Score
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Quick Inventory of Depressive Symptomatology, Self-Report (QIDS-SR16); total scores range from 0 to 27, with higher scores indicating more severe depression.
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Baseline, Day 5, and Day 8 for extended courses
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Change in Clinical Global Impression - Severity (CGI-S)
Časové okno: Baseline, Day 5, and Day 8 for extended courses
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Clinical Global Impression - Severity (CGI-S); scores range from 1 (normal, not at all ill) to 7 (among the most extremely ill patients), with higher scores indicating greater illness severity.
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Baseline, Day 5, and Day 8 for extended courses
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Hamilton Depression Rating Scale (HAMD-17) Total Score at 30-Day Follow-up
Časové okno: 30 days post-treatment
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17-item Hamilton Depression Rating Scale (HAMD-17) assessed 30 days after completion of treatment; total scores range from 0 to 52, with higher scores indicating more severe depression.
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30 days post-treatment
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Resting State Quantitative EEG (qEEG) Spectral Power and Theta Cordance
Časové okno: Baseline and completion of treatment (Day5 or Day8 for extended courses)
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Absolute spectral power in the delta, theta, alpha, and beta frequency bands, derived from quantitative resting-state EEG (qEEG) analysis.
Power was computed across standard electrode regions.
Prefrontal theta cordance, a quantitative EEG measure combining absolute and relative theta-band power at prefrontal electrodes, derived from resting-state qEEG analysis.
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Baseline and completion of treatment (Day5 or Day8 for extended courses)
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Heart-Brain Coupling (HBC): Heart Rate Oscillation Power at the Stimulation Frequency
Časové okno: Single dedicated measurement session after the target dose was reached, up to Day 8
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Heart-brain coupling (HBC), a parameter quantifying the strength of stimulation-induced heart rate deceleration, computed as the mean oscillation power of cardiac rate at the frequency determined by the stimulation train interval (Dijkstra et al., 2023).
HBC ranges from 0 to 1. Measurements were obtained in a dedicated session using a 10 Hz protocol (50 pulses per train, 5-second train duration, 15 trains, 11-second inter-train interval), recorded with a Polar H10 chest strap and the HeartBrainConnect application.
HBC was assessed sequentially at four sites per participant: left dmPFC, left dorsolateral prefrontal cortex (DLPFC), right dmPFC and right DLPFC.
For each site, stimulation began at 28% below target intensity and increased by 2% per train, yielding 15 HBC values that were averaged to produce a per-site HBC value.
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Single dedicated measurement session after the target dose was reached, up to Day 8
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EEG Microstate Temporal Parameters
Časové okno: Baseline and completion of treatment (Day5 or Day8 for extended courses)
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Temporal parameters of the canonical resting-state EEG microstate classes (A, B, C, and D), including mean duration (milliseconds), occurrence (mean appearances per second), time coverage (percentage of recording time), and transition probabilities between classes.
Parameters were derived from microstate segmentation of resting-state EEG recordings.
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Baseline and completion of treatment (Day5 or Day8 for extended courses)
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Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Termíny studijních záznamů
Hlavní termíny studia
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Začátek studia
Primární dokončení (Aktuální)
Primární dokončení
Dokončení studie (Aktuální)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
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