A Phase 1/2 Study of the Safety and Tolerability of MT-125 in GBM Patients

The purpose of the study is to determine the recommended dose and further understand the safety of MT-125 in participants who have been diagnosed with glioblastoma, a primary brain tumor, when administered in combination with your standard of care treatment. Initially, participants with newly diagnosed glioblastoma will be given different doses of MT-125 in combination with radiotherapy (RT) with the goal of identifying the highest tolerated dose. Up to 36 people with glioblastoma who are at least18 years old are being invited to join this study. MT-125 is a type of study treatment which acts on cancer cells in the brain to destroy them. It will be administered on the same day as your standard of care radiotherapy because it is also designed to help radiotherapy work better. However, this is the first time MT-125 will be studied in humans. Therefore, the use is considered investigational. If you would like more details about MT-125 in glioblastoma participants, please ask the Study Doctor. You will be among the first participants with glioblastoma to receive this study treatment. Its safety and effectiveness have not yet been established in humans. Thus, we do not know whether it will work for you. Your condition may improve, may get worse, or there may be no change. The selected participant population-individuals newly diagnosed with histologically and/or molecularly confirmed IDH wild-type, MGMT-unmethylated glioblastoma-represents those least likely to experience safety concerns or adverse events related to the study treatment, and most likely to derive therapeutic benefit. There are certain tests/questions you must complete to find out if you meet the requirements to be in the study. If you do not meet these requirements, you cannot take part in the study. If this happens, you can talk to your Study Doctor about other options.

NCT Number	NCT07185880
Lead Sponsor	Myosin Therapeutics Inc. Collaborators: Mayo Clinic, National Cancer Institute (NCI)
Conditions	Glioblastoma (GBM)
Enrollment	36 participants
Start Date	2026-04-01
Primary Completion	2026-10-31 (estimated)
Study Completion	2032-02 (estimated)
Updated on ClinicalTrials.gov	2026-04-14