Optimizing lymphoDepletion to Improve Outcomes In Patients Receiving Cell Therapy With Yescarta

Recruiting now · Phase 1

Conditions studied: DLBCL - Diffuse Large B Cell Lymphoma

In brief

This is a Phase 1b study of participants with Diffuse Large B Cell Lymphoma (DLBCL). The purpose of this study is to identify an optimized lymphodenpletion (LD) regimen by evaluating standard and intermediate doses of Fludarabine (Flu) / Cyclophosphamide (Cy) with or without a fixed dose of total lymphoid irradiation (TLI) in the setting of standard of care CAR T cell therapy.

Key facts

Study ID

NCT05950802

Run by

University Health Network, Toronto

People needed

40

Starts

2023-07-14

Expected to finish

2027-09-01

Last updated by the study team

2025-12-08

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age ≥ 18 years at the time of informed consent
• Life expectancy ≥ 12 weeks
• Biopsy-proven and histologically confirmed R/R large B cell lymphoma, including R/R DLBCL, transformation from FL, and R/R PMBCL.
• Radiographically documented measurable disease as per Lugano response criteria (i.e. LDi > 1.5 cm that is FDG avid).
• At least 2 weeks or 5 half-lives, whichever is shorter, must have elapsed since any prior systemic cancer therapy at the time the subject provides consent
• Eligible for standard of care CAR T cell therapy, specifically, relapsed or refractory large B cell lymphoma after two or more lines of systemic therapy, and subjects must have received adequate first-line therapy including at a minimum:
• Anti-CD20 monoclonal antibody unless investigator determines that tumor is CD20 negative, and
• An anthracycline containing chemotherapy regimen
• Patient does not have active CNS disease
• Patient is sufficiently stable to facilitate planned CAR T-cell therapy (e.g. not rapidly progressing on temporizing therapy, no significant compromise of vital organ functions (intubation, dialysis, requiring ICU/vasopressor support)) and has good performance status
• ECOG performance status 0 or 1 at enrollment
• Patient has not received prior adoptive T-cell immunotherapy
• Patient is not HIV positive
• Patient did not receive prior allogeneic stem cell transplant
• Adequate bone marrow, renal, hepatic, pulmonary and cardiac function
• Females of childbearing potential must have a negative serum or urine pregnancy test (females who have undergone surgical sterilization or who have been postmenopausal for at least 2 years are not considered to be of childbearing potential)
• Sexually active males who accept to use a condom during intercourse during treatment and for 6 months after treatment as they should not father a child in this period. A condom is required to be used also by vasectomized men (as well as during intercourse with a male partner) in order to prevent delivery of the drug via seminal fluid
• Must have an apheresis product of non-mobilized cells accepted for manufacturing.

You may not qualify if…

• Persisting disease bulk (defined as ≥10 cm) on restaging imaging following bridging therapy.
• History of malignancy other than nonmelanoma skin cancer or carcinoma in situ (e.g. cervix, bladder, breast) unless disease free for at least 3 years
• History of Richter's transformation of CLL
• History of allogeneic stem cell transplant
• Received < 2 lines of therapy for large B cell lymphoma
• Prior CD19 targeted therapy
• Subject has received or undergone the following:
• o Therapeutic doses of corticosteroids (defined as >20 mg/day prednisone or equivalent) within 7 days prior to leukapheresis.
• Physiologic steroid replacement, topical, and inhaled steroids are permitted.
• Cytotoxic chemotherapeutic agents that are not considered lymphotoxic, and intrathecal (IT) chemotherapy must be stopped ≥ 7 days prior to leukapheresis.
• Lymphotoxic chemotherapeutic agents (eg, cyclophosphamide > 300 mg/m2, ifosfamide, bendamustine) 4 weeks prior to leukapheresis.
• Experimental agents within 4 weeks prior to signing the ICF, unless no response or PD is documented on the experimental therapy and at least 5 half-lives have elapsed prior to leukapheresis.
• Ibrutinib, lenalidomide and PI3K inhibitor within 5 half-lives prior to leukapheresis
• Immunosuppressive therapies within 4 weeks prior to leukapheresis (eg, calcineurin inhibitors, methotrexate or other chemotherapeutics, mycophenolate, rapamycin thalidomide, immunosuppressive antibodies such as anti-tumor necrosis factor [TNF], anti-IL6, or anti- IL6R)
• Radiation within 6 weeks of leukapheresis. Subject must have progressive disease in irradiated lesions or have additional nonirradiated, PET-positive lesions to be eligible. Radiation to a single lesion, if additional non-irradiated PET-positive lesions are present, is allowed up to 2 weeks prior to leukapheresis (discuss with sponsor).
• Treatment with systemic immunostimulatory agents (including but not limited to interferon and IL-2) within 6 weeks or 5 half-lives of the drug, whichever is shorter, prior to the infusion of axicabtagene ciloleucel
• Prior chimeric antigen receptor therapy or other genetically modified T-cell therapy
• Presence of fungal, bacterial, viral, or other infection that is uncontrolled or requiring intravenous (IV) antimicrobials for management. Simple urinary tract infection (UTI) and uncomplicated bacterial pharyngitis are permitted if responding to active treatment.
• Known history of infection with human immunodeficiency virus (HIV) or hepatitis B (HBsAg positive) or hepatitis C virus (anti-HCV positive). If there is a positive history of treated hepatitis B or hepatitis C, the viral load must be undetectable per quantitative polymerase chain reaction (PCR) and/or nucleic acid testing.
• Active tuberculosis
• Presence of any indwelling line or drain (eg, percutaneous nephrostomy tube, indwelling Foley catheter, biliary drain, or pleural/peritoneal/pericardial catheter). Dedicated central venous access catheters such as a Port-a-Cath or Hickman catheter are permitted
• Subjects with detectable cerebrospinal fluid malignant cells or known CNS involvement; a history of prior treated CNS lymphoma which is not active at the time of relapse is permitted
• History or presence of significant non-malignant CNS disorder such as seizure disorder, cerebrovascular ischemia/hemorrhage, dementia, cerebellar disease, or any autoimmune disease with CNS involvement
• Subjects with cardiac atrial or cardiac ventricular lymphoma involvement
• History of myocardial infarction, cardiac angioplasty or stenting, unstable angina, New York Heart Association Class II or greater congestive heart failure, or other clinically significant cardiac disease within 12 months of enrollment

Where it is running

• Princess Margaret Cancer Centre — Toronto, Ontario, Canada (enrolling)

Full record on ClinicalTrials.gov

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