NCT04555577

Peposertib and Radiation Therapy, Followed by Temozolomide for the Treatment of Patients With Newly Diagnosed MGMT Unmethylated Glioblastoma or Gliosarcoma

Phase I Trial of DNA-PK Inhibitor (M3814) in Combination With Radiation and Adjuvant Temozolomide in Newly Diagnosed MGMT Unmethylated Glioblastoma

• Status: Recruiting
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 29 (estimated)
• Sponsor: M.D. Anderson Cancer Center · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This phase I trial investigates the side effects and best dose of Peposertib, and to see how well it works in combination with radiation therapy in treating patients with newly diagnosed MGMT unmethylated glioblastoma or gliosarcoma. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Peposertib may further stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Chemotherapy drugs, such as temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving Peposertib with radiation therapy may work better than radiation therapy alone in treating patients with glioblastoma or gliosarcoma.

Detailed description

PRIMARY OBJECTIVES: I. To determine the maximum tolerated dose (MTD) of Peposertib (M3814) in combination with standard of care radiation dose (60 Gy, 2 Gy/fraction over 6 weeks) in patients with newly diagnosed MGMT unmethylated glioblastoma (GBM). (Stage I) II. To determine the ability of M3814 to cross the blood brain barrier and to evaluate their pharmacodynamic properties in resected tissue. (Stage II) SECONDARY AND EXPLORATORY OBJECTIVES: I. To evaluate the dose limiting toxicities (DLT). (Stage I) (Secondary Objective) II. To determine the overall response rate (ORR), median progression free survival (mPFS) and median overall survival (mOS) of M3814 in combination with radiation. (Stage I) (Secondary Objective) II. To determine the overall response rate (ORR), median progression free survival (mPFS) and median overall survival (mOS) of M3814 in combination with radiation. (Stage II) (Exploratory Objective) CORRELATIVE OBJECTIVES: I. To evaluate pharmacodynamic properties of M3814. II. To assess the alterations in tumor immune microenvironment as a result of deoxyribonucleic acid (DNA)-dependent protein kinase (DNA-PK) inhibition. OUTLINE: This is a dose-escalation study of Peposertib. Patients are assigned to 1 of 2 stages. STAGE I (CONCURRENT): Patients undergo standard of care radiation therapy daily (Monday-Friday) for 30 fractions. Patients also receive Peposertib orally (PO) on each day of radiation therapy and given 1-2 hours before each treatment fraction. Treatment continues for 6 weeks in the absence of disease progression or unacceptable toxicity. STAGE I (ADJUVANT): Patients receive temozolomide PO once daily (QD) on days 1-5. Treatment repeats every 28 days for up to 6 cycles in the absence of disease progression or unacceptable toxicity. STAGE II (CONCURRENT): Patients receive Peposertib and undergo standard of care radiation therapy as in Stage I. Within 1-14 days after the completion of radiation therapy, patients undergo surgical resection. STAGE II (ADJUVANT): Patients receive temozolomide as in Stage I. After completion of study treatment, patients are followed up every 3 months.

Conditions

• Glioblastoma
• Gliosarcoma

Interventions

Type	Name	Description
DRUG	Peposertib	Given PO
RADIATION	Radiation Therapy	Undergo radiation therapy
PROCEDURE	Resection	Undergo surgical resection
DRUG	Temozolomide	Given PO

Timeline

• Start date: 2020-09-20
• Primary completion: 2027-12-31
• Completion: 2027-12-31
• First posted: 2020-09-18
• Last updated: 2025-10-29

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study