Blood Brain Barrier (BBB) Disruption Using Exablate Focused Ultrasound With Doxorubicin for Treatment of Pediatric DIPG

Phase 1

Recruiting

• Conditions: Brain Tumor
• Interventions: Device: Exablate; Drug: Doxorubicin

• Registration Number: NCT05615623
• Lead Sponsor: InSightec

Brief Summary

The purpose of this study is to evaluate the safety and efficacy of targeted blood brain barrier disruption with Exablate Model 4000 Type 2.0/2.1 in combination with Doxorubicin therapy for the treatment of DIPG in pediatric patients

Detailed Description

This is a prospective, single arm, non-randomized feasibility study to evaluate the safety, feasibility and preliminary efficacy of Blood Brain Barrier Disruption (BBBD) using the Exablate Type 2 system in pediatric patients with Diffuse Intrinsic Pontine Gliomas (DIPG) undergoing Doxorubicin chemotherapy. The study will be conducted at a single center in Canada. Patients will undergo 3 treatment cycles, approximately 4 -6 weeks apart. The study aims to establish feasibility and safety of Exablate BBBD in conjunction with Doxorubicin in the treatment of pediatric DIPG and assess preliminary efficacy in this patient population.

Study Timeline

• Study First Submitted: 2022-11-07
• Study First Submitted QC: 2022-11-07
• Study First Posted: 2022-11-14
• Study Start: 2023-01-04
• Status Verified: 2025-04
• Last Update Submitted: 2025-04-28
• Last Update Posted: 2025-04-30
• Primary Completion: 2026-01
• Study Completion: 2026-07

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

• Age between 5 and 18 years, inclusive
• Patient diagnosed with DIPG
• At least 4-week and not greater than 12 weeks from completion of radiation therapy
• Post-radiation imaging does not show evidence of necrosis/ hemorrhage or other features that contraindicate MRgFUS
• Able to attend all study visits and with life expectancy of at least 6 months
• Able and willing to give consent and/or assent or have a legal guardian who is able and willing to do so
• If on steroids, stable or decreasing dose for at least 7 days prior to study entry
• If brain surgery occurred, at least 14 days passed since last brain surgery and the patient is fully recovered and neurologically stable

Exclusion Criteria

• Evidence of cranial or systemic infection
• Known life-threatening systemic disease
• Previous treatment with complete cumulative doses of Doxorubicin, daunorubicin, idarubicin, and/or other anthracyclines and anthracenediones
• Contraindication to Doxorubicin. - Known sensitivity to DEFINITY® ultrasound contrast agent or known hypersensitivity to perflutren microsphere or its components, e.g., polyethylene glycol. - Known sensitivity to gadolinium-based contrast agents
• Active seizure disorder or epilepsy (seizures despite medical treatment) for a minimum of 4 weeks prior to first cycle/Exablate BBBD procedure captured by history
• Patients with positive HIV status. - Immunosuppression (corticosteroids to prevent/treat brain edema are permitted)
• Cerebral or systemic vasculopathy, including intracranial thrombosis, vascular malformation, cerebral aneurysm, or vasculitis
• Hypertension per age
• History of a bleeding disorder, coagulopathy or with a history of spontaneous tumour hemorrhage
• Anti-coagulant therapy, or medications known to increase risk of hemorrhage, (e.g., ASA, non-steroidal anti-inflammatory drugs [NSAIDs], statins) within washout period prior to treatment
• Patient receiving bevacizumab (Avastin) therapy or increasing doses of steroids
• Symptoms and signs of increased intracranial pressure
• Previous participation in other chemotherapy, molecularly targeted therapy or immunotherapy treatment-related phase 1 or 2 trials
• Tumor not visible on any pre-therapy or post-radiation imaging

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Blood Brain Barrier Disruption (BBBD)	Exablate	Exablate MR Guided Focused Ultrasound for Blood Brain Barrier Disruption with Doxorubicin for treating pediatric patients with DIPG
Blood Brain Barrier Disruption (BBBD)	Doxorubicin	Exablate MR Guided Focused Ultrasound for Blood Brain Barrier Disruption with Doxorubicin for treating pediatric patients with DIPG

Primary Outcome Measures

Name	Time	Method
Adverse Events	2 years	All adverse events from first treatment to end of study will be documented and reported according to the CTCAE terminology and severity scale

Secondary Outcome Measures

Name	Time	Method
Blood Brain Barrier Disruption (BBBD)	Immediately post BBBD sonication	BBBD will be assessed as a comparative ratio measured in pre and post-sonication contrast-enhanced MR images

Trial Locations

Locations (1)

Sunnybrook Research Institute; 🇨🇦 Toronto, Ontario, Canada