This phase I trial tests the feasibility, safety and effectiveness of genetically engineered hematopoietic stem progenitor cell transplantation followed by chimeric antigen receptor (CAR) T cell therapy for treating patients with acute myeloid leukemia (AML) that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). CD33 knockout hematopoietic stem progenitor cells (CD33KO-HSPC) are donor stem cells that have been modified so that the CD33 protein the cells usually show on their surface is not shown anymore. This makes the bone marrow cells "invisible" to the CAR T cells and makes the CAR T cell therapy safer. CAR T-cell therapy is a type of treatment in which the donors T cells (a type of immune system cell) are changed in the laboratory so they will attack cancer cells. T cells are taken from the donors 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 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. Conditioning chemotherapy before stem cell transplantation helps kill cancer cells in the body and helps make room in the bone marrow for new stem cells to grow. Giving CD33KO-HSPC followed by CAR T therapy may be safe, tolerable and/or effective in treating patients with relapsed or refractory AML.
Additional locations may be listed on ClinicalTrials.gov for NCT05945849.
Locations matching your search criteria
United States
Pennsylvania
Philadelphia
University of Pennsylvania/Abramson Cancer CenterStatus: Active
Contact: Noelle Frey
Phone: 215-662-2867
PRIMARY OBJECTIVES:
I. Determine the feasibility of manufacturing of allogeneic gene-edited CD33-knockout hematopoietic stem and progenitor cells (CD33KO-HSPC) based on the proportion of subjects whose product 1 (CD33KO-HSPC) meets release criteria.
II. Determine the safety of allogenic hematopoietic stem cell transplantation (alloHSCT) with CD33KO-HSPC based on the proportion of subjects infused with CD33KO-HSPC who experience dose limiting toxicity (DLT).
III. Determine the safety of product 2 (allogeneic CD33CAR-CD3zeta-4-1BB-expressing T-lymphocytes [chimeric antigen receptor T cells (CART)-33 cells]) based on the proportion of subjects infused with CART-33 who experience a DLT.
SECONDARY CLINICAL OBJECTIVES:
I. Estimate the efficacy of CD33KO-HSPC alloHSCT as defined by standard engraftment criteria for alloHSCT.
II. Estimate the efficacy of at least 1 dose of CART-33 cells after CD33KO-HSPC alloHSCT as defined by clinical response according to established criteria for acute myeloid leukemia (AML).
III. Estimate the overall survival (OS).
IV. Estimate the progression-free survival (PFS).
V. Estimate the duration of response (DOR).
SECONDARY CORRELATIVE OBJECTIVES:
I. Describe persistence of engrafted CD33KO-HSPC after treatment with CART-33.
II. Estimate persistence and trafficking of CART-33 cells.
III. Estimate CART-33 bioactivity.
OUTLINE:
Patients receive standard of care conditioning chemotherapy as determined by the physician and investigator. Patients then receive CD33KO-HSPC intravenously (IV) on day 0. After day +28, patients receive CART-33 IV every 4-6 weeks for up to 4 doses in the absence of disease progression or unacceptable toxicity and dependent on availability of the product. Patients undergo echocardiography or multigated acquisition (MUGA) scan during screening, and bone marrow biopsy and aspiration and blood sample collection throughout the study.
After completion of study treatment, patients are followed up on days 7, 14, 18, 21, 24 and 28 after CD33KO-HSPC infusion and months 2, 3, 4, 6, 8, 10, 12 after last CART-33 infusion, then every 6 months up to month 60 then yearly up to 15 years.
Lead OrganizationUniversity of Pennsylvania/Abramson Cancer Center
Principal InvestigatorNoelle Frey