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Electrophysiological Biomarkers in Accelerated TMS for Depression

22 maja 2026 zaktualizowane przez: Ali Tarık Altunç, Istanbul University - Cerrahpasa

Electrophysiological Biomarkers of Treatment Response in Major Depressive Disorder Patients Receiving Accelerated Transcranial Magnetic Stimulation

This study investigates whether physiological signals recorded during transcranial magnetic stimulation (TMS) can predict which patients with major depression respond to treatment. Thirty-two adults with major depressive disorder receive an accelerated TMS protocol targeting the dorsomedial prefrontal cortex using a double-cone coil, delivered as four sessions per day over five to eight days. Heart rate is continuously monitored throughout every stimulation session using a chest-strap sensor, and electroencephalography (EEG) is recorded before and after treatment. Heart-brain coupling was assessed in a separate dedicated session after the target stimulation dose was reached.The primary clinical outcome is the change in depression severity measured by the Hamilton Depression Rating Scale (HAMD-17) from baseline to post-treatment. Prespecified physiological outcomes include stimulation-evoked heart rate deceleration, resting-state EEG parameters, and heart-brain coupling metrics. The aim is to evaluate whether these electrophysiological measures index target engagement and predict antidepressant response, potentially supporting their use as functional biomarkers for personalizing accelerated TMS in depression.

Przegląd badań

Typ studiów

Interwencyjne

Zapisy (Rzeczywisty)

32

Faza

  • Nie dotyczy

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Lokalizacje studiów

    • Bakırköy
      • Istanbul, Bakırköy, Turcja (Türkiye)
        • Istanbul University-Cerrahpaşa Cerrahpaşa Medical Faculty Psychiatry Department

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

  • Dorosły
  • Starszy dorosły

Akceptuje zdrowych ochotników

Nie

Opis

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

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Leczenie
  • Przydział: Nie dotyczy
  • Model interwencyjny: Zadanie dla jednej grupy
  • Maskowanie: Brak (otwarta etykieta)

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Eksperymentalny: 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.
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.

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Change in Hamilton Depression Rating Scale (HAMD-17) Score
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
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.
Baseline, Day 5, and Day 8 for extended courses

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Heart rate deceleration during stimulation
Ramy czasowe: Through completion of the treatment course, up to 8 days
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.
Through completion of the treatment course, up to 8 days
Change in Beck Depression Inventory (BDI)
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
Beck Depression Inventory (BDI), a self-report scale; total scores range from 0 to 63, with higher scores indicating more severe depression.
Baseline, Day 5, and Day 8 for extended courses
Change in Beck Anxiety Inventory (BAI)
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
Beck Anxiety Inventory (BAI), a self-report scale; total scores range from 0 to 63, with higher scores indicating more severe anxiety.
Baseline, Day 5, and Day 8 for extended courses
Change in Beck Scale for Suicide Ideation (BSS)
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
Beck Scale for Suicide Ideation (BSS), a self-report scale; total scores range from 0 to 38, with higher scores indicating greater suicidal ideation.
Baseline, Day 5, and Day 8 for extended courses
Change in Quick Inventory of Depressive Symptomatology - Self-Report (QIDS-SR16) Total Score
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
Quick Inventory of Depressive Symptomatology, Self-Report (QIDS-SR16); total scores range from 0 to 27, with higher scores indicating more severe depression.
Baseline, Day 5, and Day 8 for extended courses
Change in Clinical Global Impression - Severity (CGI-S)
Ramy czasowe: Baseline, Day 5, and Day 8 for extended courses
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.
Baseline, Day 5, and Day 8 for extended courses
Hamilton Depression Rating Scale (HAMD-17) Total Score at 30-Day Follow-up
Ramy czasowe: 30 days post-treatment
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.
30 days post-treatment
Resting State Quantitative EEG (qEEG) Spectral Power and Theta Cordance
Ramy czasowe: Baseline and completion of treatment (Day5 or Day8 for extended courses)
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.
Baseline and completion of treatment (Day5 or Day8 for extended courses)
Heart-Brain Coupling (HBC): Heart Rate Oscillation Power at the Stimulation Frequency
Ramy czasowe: Single dedicated measurement session after the target dose was reached, up to Day 8
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.
Single dedicated measurement session after the target dose was reached, up to Day 8
EEG Microstate Temporal Parameters
Ramy czasowe: Baseline and completion of treatment (Day5 or Day8 for extended courses)
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.
Baseline and completion of treatment (Day5 or Day8 for extended courses)

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Rzeczywisty)

13 czerwca 2024

Zakończenie podstawowe (Rzeczywisty)

14 marca 2025

Ukończenie studiów (Rzeczywisty)

14 kwietnia 2025

Daty rejestracji na studia

Pierwszy przesłany

18 maja 2026

Pierwszy przesłany, który spełnia kryteria kontroli jakości

22 maja 2026

Pierwszy wysłany (Rzeczywisty)

29 maja 2026

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

29 maja 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

22 maja 2026

Ostatnia weryfikacja

1 maja 2026

Więcej informacji

Terminy związane z tym badaniem

Inne numery identyfikacyjne badania

  • 37949

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

NIE

Opis planu IPD

De-identified individual-level data are not publicly available due to privacy and ethical restrictions on sensitive clinical data, but may be available from the corresponding author upon reasonable request and with appropriate ethics committee approval.

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .

Badania kliniczne na Duże zaburzenie depresyjne (MDD)

  • The University of Hong Kong
    Rekrutacyjny
    Myśli samobójcze | Zaburzenie lękowe | Atak paniki | Duże zaburzenie depresyjne (MDD) | Zaburzenie afektywne dwubiegunowe typu I | Zaburzenia związane z używaniem alkoholu (AUD) | Zaburzenie afektywne dwubiegunowe II | Zespół stresu pourazowego (PTSD) | Maniakalny odcinek | Zaburzenie obsesyjno-kompulsyjne (OCD) i inne warunki
    Hongkong

Badania kliniczne na Accelerated bilateral dmPFC-iTBS

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