Thalamic transcranial ultrasound stimulation in treatment resistant depression.
Joline M Fan, Kai Woodworth, Keith R Murphy...
https://pubmed.ncbi.nlm.nih.gov/39173737/Actively Recruiting
Led by University of California, San Francisco · Updated on 2026-07-02
40
Participants Needed
1
Research Sites
N/A
Total Duration
Researchers are studying the effects of non-invasive, low intensity focused ultrasound LIFU stimulation on seizure frequency and brain activity in adults with drug-resistant epilepsy. This trial aims to understand how LIFU can modulate deep brain regions involved in seizures, using electroencephalography EEG and behavioral tasks to observe changes in brain networks. The study includes adults aged 21 to 65 who experience frequent seizures despite medication. Participants will undergo a series of LIFU sessions using the ATTN201 wearable device, which targets personalized brain areas based on MRI scans to optimize treatment response. The study uses a within-subject, randomized, sham-controlled design, meaning each participant receives both active and placebo sham LIFU during different sessions. If an optimal brain target is found, participants will then receive repeated LIFU stimulation at that target over several months. During the approximately four-month study period, participants will track seizure counts daily for at least one month before starting and continue throughout the study and for two months after. Brain network changes will be assessed using functional MRI and electrophysiology at baseline and after serial stimulation. Cognitive tests will be performed at multiple points to monitor effects. Participants will wear the LIFU device as a headband and complete scheduled visits and seizure logs to help researchers measure seizure frequency and brain changes.
CONDITIONS
Non-Invasive Low Intensity Focused Ultrasound Stimulation for Drug-Resistant Epilepsy
S
Study Coordinator
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University of California, San Francisco
Lead Sponsor
Attune Neurosciences Inc
Collaborating Sponsor
This table compares participation in this trial with other options available for this condition. The information is drawn from published research and the trial’s study details and is provided for educational purposes only.
| Factors | Target‑optimization LIFU | Serial LIFU stimulation | Standard neuromodulation or surgery |
|---|---|---|---|
| What this option is | Device‑based low‑intensity focused ultrasound delivered via wearable ATTN201 device guided by MRI positioning to optimize deep brain target for seizure network modulation. | Repeated sessions of low‑intensity focused ultrasound using ATTN201 wearable device on targets selected via initial optimization to modulate epileptogenic network. | Established neuromodulation or surgical options such as responsive neurostimulation, deep brain stimulation, or resective surgery for drug‑resistant epilepsy. |
| Role in trial | One of the randomized investigational arms. | The other randomized investigational arm. | Not part of the study arms; presented for clinical context. |
| Primary purpose | Neuromodulation of epileptogenic networks to reduce seizure frequency. | Neuromodulatory intervention to assess network response and reduce seizures following optimization. | Control or management of seizures in drug‑resistant epilepsy using approved neuromodulation or surgery. |
| How it is given or performed | Single session delivered via ATTN201 wearable device, positioned using MRI guidance to select optimal target. | Multiple LIFU sessions via ATTN201 device applied to targets defined during optimization phase. | Performed per clinical standards: may involve implanted stimulators or surgical resection under neurosurgical guidance. |
| Current evidence status | Safety and feasibility under investigation; no published human efficacy evidence yet. | Similarly under evaluation; no confirmed seizure reduction evidence in humans to date. | Clinical benefit demonstrated in many patients with drug‑resistant epilepsy through neuromodulation or surgery. |
| Known risks | Safety under study; preclinical data show promise but human safety outcomes are not yet published. | Same as above: safety being evaluated experimentally; no known serious risks yet documented. | Known surgical and neuromodulation risks include bleeding, infection, device‑related complications, and potential neurologic side effects. |
| Important limitations | No human efficacy data; feasibility and optimal targeting parameters are untested clinically. | Unclear whether serial stimulation improves outcomes over single optimization alone; long‑term effects unknown. | Invasive options have surgical risks; not all patients are eligible due to seizure focus localization issues or comorbidities. |
Disclaimer: This comparison is created with the help of artificial intelligence(AI) and may contain errors or missing information. It is not medical advice and does not mean one option is better or safer than another. Clinical trials are still being studied, and joining a trial is your choice. Please consult your healthcare professional before making any decisions.
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Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
Duration - Approximately 1 month
Participants undergo sessions of low intensity focused ultrasound to identify optimal brain targets for stimulation using a wearable device guided by MRI scans. They receive both active and sham stimulation in a randomized order.
Duration - Around 4 months
Participants receive repeated ultrasound stimulation at the identified optimal brain target to assess clinical and physiological responses over several months.
Duration - Up to 2 months
Seizure frequency and brain activity are monitored for up to 2 months after the final stimulation session to assess lasting effects.
Study Type
INTERVENTIONAL
Masking
TRIPLE
Allocation
RANDOMIZED
Model
SINGLE_GROUP
Primary Purpose
TREATMENT
Number of Arms
2
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Joline M Fan, Kai Woodworth, Keith R Murphy...
https://pubmed.ncbi.nlm.nih.gov/39173737/University of California, San Francisco
Lead Sponsor
Attune Neurosciences Inc
Collaborating Sponsor