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Clinical Trial Summary

This phase I trial studies the side effects of CD19/CD22 chimeric antigen receptor (CAR) T cells when given together with chemotherapy and NKTR-255, and to see how well they work in treating patients with CD19 positive B acute lymphoblastic leukemia that has come back or does not respond to treatment. A CAR is a genetically-engineered receptor made so that immune cells (T cells) can attack cancer cells by recognizing and responding to the CD19/CD22 proteins. These proteins are commonly found on diffuse large B-cell lymphoma and B acute lymphoblastic leukemia. Drugs used in chemotherapy, such as cyclophosphamide and fludarabine phosphate, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. NKTR-255 is an investigational IL-15 receptor agonist designed to boost the immune system's natural ability to fight cancer. Giving CD19/CD22-CAR T cells and chemotherapy in combination with NKTR-255 may work better in treating patients with diffuse large B-cell lymphoma or B acute lymphoblastic leukemia.


Clinical Trial Description

PRIMARY OBJECTIVES: I. Determine the feasibility of producing CD19/CD22 CAR T cells meeting the established release criteria. II. Assess the safety of administering escalating doses of autologous CD19/CD22 CAR T cells that meet established release specifications in adults with B cell hematologic malignancies following a cyclophosphamide/fludarabine conditioning regimen. III. Assess the safety and feasibility of administering repeated doses of NKTR-255 intravenously after CD19/CD22-CAR T cell infusions in adults with ALL using a dose escalation design. IV. Determine the recommended phase 2 dose (RP2D) of NKTR-255 when administered following CD19/CD22-CAR T cell infusion in adults with ALL SECONDARY OBJECTIVES: I. Evaluate the ability of CD19/CD22 CAR T cells to mediate clinical activity in adults with DLBCL and adults with ALL. II. Characterize the pharmacokinetics (PK) of NKTR-255 when administered post CD19/CD22 CAR T cell infusion. III. Explore the rate of relapse, progression free survival (PFS) and overall survival (OS) in subjects receiving CD19/CD22 CAR T cells, followed by up to 6 cycles of NKTR-255 ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03233854
Study type Interventional
Source Stanford University
Contact
Status Active, not recruiting
Phase Phase 1
Start date September 1, 2017
Completion date September 1, 2035

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