Mipetresgene autoleucel

The target populations for this phase I study with TBI-1301 are patients with advanced solid tumors. Patients' tumors will be required to express NY-ESO-1, which include but is not limited to ovarian cancer, synovial sarcoma, esophageal cancer, lung cancer, bladder cancer, liver cancer, and malignant melanoma. Patients must be positive for HLA-A*02:01 or HLA-A*02:06 and the patient's tumor tissue must be positive for NY-ESO-1 antigen expression. The study will take the subject's T cells, which are a natural type of immune cell in the blood, and send them to a laboratory to be modified. The changed T cells used in this study will be the subject's own T cells that have been genetically changed with the aim of attacking and destroying cancer cells.
The manufacturing of T cells takes about 1 month to complete. The T cells will be given back to the subject through an intravenous infusion. The purpose of this study is to test the safety of genetically changed T cells and find out what effects, if any, they have in subjects with advanced solid tumors.
The purpose of this study is to evaluate the safety profile of TBI-1301, to determine the recommended phase 2 (RP2D) dose of TBI-1301 when administered following cyclophosphamide and fludarabine pre-treatment, to evaluate the safety of repeat dosing of TBI-1301, to assess the presence/absence of RCR appearance after TBI-1301 infusion, to assess the presence or absence of clonality by LAM-PCR, and to evaluate evidence of efficacy of TBI-1301 using RECIST v1.1.

Following pre-treatment with cyclophosphamide and/or fludarabine, NY-ESO-1-specific TCR gene transduced T lymphocytes are transferred to the patients with NY-ESO-1-expressing solid tumors.