Beginning Radiation Immediately With GammaTile at GBM Excision Versus Standard of Care

Study Purpose

This is a Phase 3 prospective, randomized, superiority, open-label, multi-site study. The overview of this study is as follows:

- A Screening/Baseline Period of 21 days.

During this time, patients will be randomized into a 1:2 allocation of Arm A:Arm B.

- A Perioperative/Operative Phase where patients will undergo tumor resection (Arm A) or tumor resection plus GammaTile implantation (Arm B).

- An EBRT Prior to Start Period.

This occurs within 10 business days prior to EBRT and Concurrent TMZ Phase.

- An EBRT and Concurrent TMZ Phase, which will begin 30 ±10 days post-surgery.

EBRT (30 fractions) and TMZ will be administered up to 5 days a week for 6 weeks in Arm A, and EBRT (20 fractions) and TMZ will be administered for up to 5 days a week for 4 weeks in Arm B. TMZ will be administered at a dose of 75 mg/m2/day orally for each Arm.

- An Adjuvant TMZ Phase, which begins 28 ±7 days following the EBRT and Concurrent TMZ Phase, and is comprised of six 28-day cycles.

TMZ (150-200 mg/m2/day orally) will be administered for the first 5 days of each 28-day cycle for each Arm. Tumor treating fields are allowed but are not mandated during this phase. Up to 6 additional cycles (for a total of 12) can be completed at the discretion of the Investigator.

- An Early Discontinuation/Follow-Up Phase will occur 28 ±7 days after completion of Cycle 6 of the Adjuvant TMZ Phase, regardless of the total number of cycles completed or any delays in cycle start.

If fewer than six cycles are completed, the first follow-up assessment will occur 28 ±7 days after the last administered dose of adjuvant TMZ. If patient has a qualifying event requiring entrance to Early Discontinuation Phase, the first follow-up assessment will occur as soon as feasible, but within 28 days. For any unscheduled visits, data collected should be documented in the case report form (CRF) and must include, but are not limited to, safety evaluations, survival status, and disease status.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Interventional
Eligible Ages	18 Years and Over
Gender	All

More Inclusion & Exclusion Criteria

Major Criteria Includes the Following: Inclusion Criteria.

- Patients must be ≥18 years of age.

- Have radiographic suspicion of newly diagnosed glioblastoma (GBM).

o If final pathology reports IDH mutant glioma, then the patients found to have an IDH mutation will be followed for safety and QoL measures but will not be included in the primary and secondary comparative survival and efficacy analyses.

- Are medically and surgically appropriate for resection.

- Have an estimated Karnofsky Performance Scale (KPS) score of ≥70.

- Are able to receive standard of care treatment.

Exclusion Criteria.

- A previous biopsy diagnosis other than IDH wild-type GBM.

- Have contraindications to TMZ, magnetic resonance imaging, gadolinium, or non-contrast computed tomography.

- Have multi-focal enhancing tumors that cannot be encompassed in one operative field.

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT07195591
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.	Phase 3
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	GT Medical Technologies, Inc.
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	N/A
Principal Investigator Affiliation	N/A
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Industry
Overall Status	Not yet recruiting
Countries	United States
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Glioblastoma

Arms & Interventions

Arms

Active Comparator: Maximal safe resection followed by EBRT with concurrent TMZ followed by adjuvant TMZ (Arm A)

All patients will undergo tumor resection. Start TMZ (75 mg/m2/day orally) on the first day of EBRT and will be administered concurrently with EBRT, up to 5 days per week, for the 30-fraction course of EBRT for 6 weeks within 30±10 days post-surgery. After EBRT and concurrent TMZ phase, the first cycle begins 28 ±7 days following the last day of the EBRT and Concurrent TMZ Phase. Adjuvant TMZ includes 5 days of TMZ treatment at the start of each 28-day cycle. Additional cycles (up to a maximum of 12), which may be given at the discretion of the Investigator, will be documented, and performed in the same manner as done in the first 6 cycles.

Experimental: Maximal safe resection + GammaTile followed by EBRT with concurrent TMZ then adjuvant TMZ (Arm B)

All patients will undergo tumor resection + GammaTile implantation. Start TMZ (75 mg/m2/day orally) on the first day of EBRT and will be administered concurrently with EBRT, up to 5 days per week, for the 20-fraction course of EBRT for 4 weeks within 30±10 days post-surgery. After EBRT and concurrent TMZ phase, the first cycle begins 28 ±7 days following the last day of the EBRT and Concurrent TMZ Phase. Adjuvant TMZ includes 5 days of TMZ treatment at the start of each 28-day cycle. Additional cycles (up to a maximum of 12), which may be given at the discretion of the Investigator, will be documented, and performed in the same manner as done in the first 6 cycles.

Interventions

Device: - GammaTile®

GammaTiles are a U.S. FDA-cleared, surgically targeted radiation therapy for patients with certain brain tumors. GammaTile consists of bioresorbable collagen tiles embedded with Cesium-131 (Cs-131) radioactive seeds

Radiation: - External Beam Radiation Therapy

External beam radiation therapy (EBRT) is a type of radiation therapy that is standard of care. EBRT uses a machine outside the body to deliver high-energy beams of radiation to cancerous areas within the body

Drug: - Temozolomide

TMZ (Chemotherapy) is used as a first-line treatment, often in combination with radiation therapy after surgical resection of the tumor

Contact a Trial Team

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Sponsor, Tempe 5317058, Arizona 5551752

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Tempe 5317058, Arizona 5551752, 85281

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