NCT05765812
A Study of Zedoresertib (Debio 0123) in Combination With Temozolomide in Adult Participants With Recurrent or Progressive Glioblastoma and of Zedoresertib (Debio 0123) in Combination With Temozolomide and Radiotherapy in Adult Participants With Newly Diagnosed Glioblastoma
Recruiting · Phase 1, Phase 2 · Debiopharm International SA · registry updated 2026-10-28
Inclusion and exclusion lines below are quoted from ClinicalTrials.gov. No match score is shown, because a score needs a person's age, biomarkers, and treatment dates. Confirm the record with the study team.
The primary purpose of the Phase 1 (Dose Escalation) of this study is to identify the dose-limiting toxicities (DLTs) of zedoresertib combined with temozolomide (TMZ) (Arm A) and with TMZ and radiotherapy (RT) (Arms B and C) and to characterize the safety and tolerability of these combinations in adult participants with glioblastoma (GBM). Arm B which was previously added to the protocol, has been permanently halted per the safety monitoring committees' decision on the safety findings of this arm. The primary purpose of Phase 1 (Dose expansion) of the study is to assess the doses studied under Phase 1 (Dose Escalation) Arm A and identify the recommended dose (RD) for further development. The Phase 2 will start once the RD Phase 1 has been defined. The primary objective of Phase 2 is to assess the efficacy of zedoresertib at the RD for further development in combination with TMZ, compared to the standard of care (SOC) in adult participants with GBM.
Inclusion
- Inclusion Criteria for Phase 1 and Phase 2:
- Signed written informed consent approved before undertaking any study-specific procedures.
- Age ≥18 years of age.
- Willing to provide archived or fresh tumor sample, if available. Receipt of tumor sample is not required for the start of study treatment.
- Adequate bone marrow, hepatic, and renal function.
- Willingness and ability to comply with scheduled visits, treatment plans, laboratory tests, and other study procedures.
Exclusion
- exclusion criteria for Phase 1 Arm A • Prior treatment with more than 2 lines of therapy for GBM, IDH-wildtype, Grade 4, or for astrocytoma, IDH-mutant, Grade 3
- Additional specific exclusion criteria for Phase 1 and Phase 2
- Known contraindication to undergoing for Gd-based, contrast-enhanced MRI.
- Any anticancer treatment, monoclonal antibodies/biologics, investigational treatment, or RT with curative intent within 28 days prior to starting study treatment.
- Hypersensitivity to zedoresertib, TMZ, dacarbazine, or any of the excipients found in the formulation for zedoresertib or TMZ.
- Prior exposure to any WEE1 inhibitor.