Recruiting

Focused Ultrasound

Sponsor:

Mayo Clinic

Code:

NCT05733312

Conditions

Brain Tumor

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

InSightec's ExAblate Neuro Model 4000 Type 2.0 (220 KHz) system

Study Details

Brief summary:

This study seeks to determine the impact of focused ultrasound (FUS) on the composition of the tumor extracellular microenvironment. Researchers will evaluate regions that are very abnormal, as well as regions that have less evidence of disease. A sub-portion of each of these areas will be targeted by focused ultrasound. Microdialysis catheters will then be placd into each region that has and has not been exposed to FUS (total of 4 catheters) to determine how FUS impacts the the brain and tumor extracellular metabolome, including concentration of routine drugs systemically administered prior to, and during surgery. Researchers hope that this information will help reveal the relative contribution of blood-derived compounds to the tumor microenvironment. If successful, microdialysis could be leveraged in the future to simultaneously evaluate pharmacokinetic and pharmacodynamic impacts of future candidate therapies, including those delivered with the aid of FUS.

Conditions

Brain Tumor

Study ID

NCT05733312

Start date

Jan 24, 2024

Status verified date

Sep, 2026

Completion date

Jan 15, 2027

Anticipated

Primary completion date

Jan 15, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Clinical and radiographic evidence suggesting a diagnosis of a diffuse glioma, or a prior diagnosis of a diffuse glioma, which is large enough (≥3cm) for half of the tumor to be targeted by FUS, but small enough for the standard-of-care resection to incorporate some regions of relatively normal brain adjacent to tumor.
  • Planned neurosurgical resection of this suspected or previously diagnosed brain tumor as part of routine clinical care.
  • Provide written informed consent for the current study and the Neuro-Oncology biorepository for archiving of microdialysate and blood samples collected on this protocol.
  • ECOG performance status (PS) 0, 1, or 2. Willing to undergo neurosurgical resection at Mayo Clinic (Rochester, MN).

Exclusion Criteria:

  • Patients who are not appropriate surgical candidates due to current or past medical history or uncontrolled concurrent illness which limits safety of or compliance to study proceedings.
  • Vulnerable populations: pregnant or nursing women, prisoners, mentally handicapped.
  • Contraindication to Definity®.
  • Cardiac disease or coagulative disease (such as cerebral or systemic vasculopathy, abnormal platelets, documented MI within 6 months of enrollment, pacemaker, hemodynamically unstable cardiac arrhythmia, unstable congestive heart failure, or left ventricular ejection fraction <50%), that would preclude the use of Definity ®, FUS-induced BBB disruption, or surgical resection.
  • Any blood-borne infection that may lead to meningitis or brain abscess due to BBB-disruption.
  • Active seizure disorder that is not attributable to the patient's tumor which is not controlled by medication or due to active drug or alcohol disorder which may be worsened by BBB-disruption.
  • Patients for whom the surgeon feels 5-ALA would be required to perform an optimal resection, since 5-ALA will not be permitted for patients participating in this study.
  • Patients who are at risk of FUS-related complications due to potential risks associated with skull anatomy as determined by pre-operative CT assessment, based on skull thickness, curvature, density, or other features that would increase the risk of skull complications with FUS.

Study Design

Enrollment

6 participants

Anticipated

Intervention Model

Single group

Primary purpose

Basic Science

Interventions and Outcome Measures

Arms

experimental: Focused Ultrasound

Subjects with known or suspected glioma (≥3cm) undergoing routine planned neurosurgical resection will undergo a focused ultrasound prior to the surgery with the InSightec's ExAblate Neuro Model 4000 Type 2.0 (220 KHz) system

Interventions

InSightec's ExAblate Neuro Model 4000 Type 2.0 (220 KHz) system

Focused ultrasound which targets energy to a specific area in the brain based on imaging and disrupts the blood brain barrier which keeps certain drugs and other molecules out of the brain.

Primary outcome measure

  • Adverse events [ Time Frame: 3 months post-surgery ]
  • Number of microdialysate aliquots [ Time Frame: 3 months post-surgery ]

Central Contacts and Locations

Central contacts

Neurologic Surgery Research Team

507-266-6858hoplin.matthew@mayo.edu

Clinical Trials Referral Office

855-776-0015mayocliniccancerstudies@mayo.edu

Locations

Mayo Clinic Minnesota

Recruiting

Rochester, Minnesota, United States, 55905

Contacts

Neurologic Surgery Research Team

507-266-6858hoplin.matthew@mayo.edu

Principal Investigator:

Terry Burns, MD, PhD

More Information

Sponsor

Mayo Clinic

Last update posted

Sep 23, 2026

Last verified

Sep, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-10-23. This information was provided to ClinicalTrials.gov by Mayo Clinic on 2026-09-23. Recruitment status is synced daily from ClinicalTrials.gov and may not reflect the sponsor's current status. Confirm during your call.