NCT06191887

Phase 1a/1b Dose Escalation and Cohort Expansion Study of the Safety and Efficacy of B-Cell Activating Factor Receptor (BAFFR)-Based Chimeric Antigen Receptor T-Cells (MC10029) in Subjects With Relapsed or Refractory BAFFR-Expressing B-Cell Hematologic Malignancies

Study Summary

This phase I trial tests safety, side effects and best dose of B-cell activating factor receptor (BAFFR)-based chimeric antigen receptor T-cells, with fludarabine and cyclophosphamide lymphodepletion, for the treatment of patients with B-cell hematologic malignancies that has come back after a period of improvement (relapsed) or that does not respond to treatment (refractory). BAFFR-based chimeric antigen receptor T-cells is a type of treatment in which a patient's T cells (a type of immune system cell) are changed in the laboratory so they will attack cancer cells. T cells are taken from a patient's blood. Then the gene for a special receptor that binds to a certain protein on the patient's cancer cells is added to the T cells in the laboratory. The special receptor is called a chimeric antigen receptor (CAR). Large numbers of the CAR T cells are grown in the laboratory and given to the patient by infusion for treatment of certain cancers. Giving chemotherapy, such as fludarabine and cyclophosphamide, helps ill cancer cells in the body and helps prepare the body to receive the BAFFR based chimeric antigen receptor T-cells. Giving BAFFR based chimeric antigen receptor T-cells with fludarabine and cyclophosphamide for lymphodepletion may work better for the treatment of patients with relapsed or refractory B-cell hematologic malignancies.

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Interventions

Autologous BAFFR-targeting CAR T CellsBIOLOGICAL
Given IV
BendamustineDRUG
Given IV
BiopsyPROCEDURE
Undergo biopsy
Biospecimen CollectionPROCEDURE
Undergo blood sample collection
Bone Marrow Aspiration and BiopsyPROCEDURE
Undergo bone marrow biopsy/aspirate
Computed TomographyPROCEDURE
Undergo CT scan
CyclophosphamideDRUG
Given IV
EchocardiographyPROCEDURE
Undergo echocardiography
FludarabineDRUG
Given IV
LeukapheresisPROCEDURE
Undergo leukapheresis
Magnetic Resonance ImagingPROCEDURE
Undergo MRI
Positron Emission TomographyPROCEDURE
Undergo PET scan

Study Locations

FacilityCityStateCountry
Mayo Clinic in FloridaJacksonvilleFloridaUnited States

Official Trial Information

View on ClinicalTrials.gov

Data sourced from ClinicalTrials.gov. Last updated: April 14, 2026