A Phase 1 interventional study of Autologous BAFFR-targeting CAR T Cells and Biospecimen Collection in Recurrent B Acute Lymphoblastic Leukemia, Recurrent B Lymphoblastic Lymphoma and Refractory B Acute Lymphoblastic Leukemia, sponsored by City of Hope Medical Center. Not yet recruiting at 2 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-11.
Sponsored by City of Hope Medical Center · Phase 1, Interventional, and Treatment
This phase I trial tests the safety and side effects of B-cell activating factor receptor (BAFFR) chimeric antigen receptor (CAR) T cells and how well they work in treating patients with B-cell acute lymphoblastic leukemia (B-ALL) and B-cell lymphoblastic lymphoma that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). CAR T-cell therapy, such as BAFFR-CAR 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 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 BAFFR-CAR T cells may be safe, tolerable and/or effective in treating patients with relapsed or refractory B-cell ALL and B-cell lymphoblastic lymphoma.
PRIMARY OBJECTIVE:
I. Assess the safety of administering autologous BAFFR-targeting CAR T cells (BAFFR[EQ]BBζ/EGFRt T cells) (also known as [aka], BAFFR-CAR T cells).
SECONDARY OBJECTIVES:
I. Evaluate the ability of BAFFR-CAR T cells to mediate clinical response in participants with B-ALL.
II. Evaluate the level of residual disease in participants who achieve remission after BAFFR-CAR T cell treatment.
III. Evaluate the duration of B cell aplasia as a surrogate for BAFFR-CAR T cell activity.
IV. Evaluate the rate and severity of graft-versus-host disease (GVHD) in recipients of prior allogeneic hematopoietic stem cell transplantation (allogeneic hematopoietic stem cell transplantation [allo-HCT]).
V. Evaluate progression-free survival (PFS) and overall survival (OS).
EXPLORATORY OBJECTIVES:
I. Measure expansion and persistence of BAFFR-CAR T cells in the peripheral blood (PB), bone marrow (BM), and cerebrospinal fluid (CSF), when available, and explore the correlation with BAFFR-CAR T cell efficacy.
II. Measure BAFF-R expression on leukemic cells, as well as other disease markers, before and after BAFFR-CAR T cell treatment and explore association with response and relapse, when feasible.
III. Measure cytokine levels in PB and CSF, when available, and explore association with response.
OUTLINE:
Patients undergo leukapheresis and may receive bridging therapy per treating physician discretion. Patients then receive lymphodepletion therapy with cyclophosphamide intravenously (IV) and fludarabine IV on days -5 to -3 and BAFFR-CAR T cells IV over 10-15 minutes on day 0. Patients also undergo blood sample collection, bone marrow aspiration and biopsy, chest x-ray, and positron emission tomography (PET)/computed tomography (CT) or CT throughout the study. Additionally, patients may also undergo liver ultrasonographic elastography at screening at discretion of investigator and brain magnetic resonance imaging (MRI) or CT, CSF specimen collection, and echocardiography (ECHO) or multigated acquisition scan (MUGA) throughout the study
After completion of study treatment, patients are followed up within 18-24 hours, at least every 2 days for 14 days, at 14, 21, 28, 60, and 100 days, at 4, 6, 7, and 12 months, then yearly for up to a total of 15 years.
976 studies on the registry are indexed under Burkitt Lymphoma; 159 are open to participants now.
This study's planned enrollment of 16 is below the median of 36 across 765 interventional studies indexed under Burkitt Lymphoma.
Browse Burkitt Lymphoma studies →City of Hope Medical Center is the lead sponsor of 677 studies on the registry; 181 are open to participants now.
Of its 31 completed or terminated interventional studies of FDA-regulated products, 12 (39%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Agreement to allow the use of from diagnostic tumor biopsies
Ineligible for or failed prior CD19-targeted immunotherapy (e.g., blinatumomab or CD19-CAR T cells)
For participants who had prior CD19-CAR T cell therapy:
Seronegative for quantitative polymerase chain reaction (qPCR), virus (HCV), and active virus (HBV) (surface antigen negative), and syphilis (rapid plasma reagin [RPR])
Meets other institutional and federal requirements for infectious disease titer requirements
Women of (WOCBP): Negative urine or serum pregnancy test
QuantiFERON-tuberculosis (TB) Gold or equivalent
Agreement by females and males of childbearing potential to use an effective method of or abstain from heterosexual activity for the course of the study through at least 3 months after the last dose of protocol therapy
Exclusion Criteria:
History of venous occlusive disease (VOD), or GvHD
Subjects with a history of the following GvHD may still be included in the study:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Histologically or cytologically confirmed
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GVHD (graft-versus-host disease)
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients undergo leukapheresis and may receive bridging therapy per treating physician discretion. Patients then receive lymphodepletion therapy with cyclophosphamide IV and fludarabine IV on days -5 to -3 and BAFFR-CAR T cells IV over 10-15 minutes on day 0. Patients also undergo blood sample collection, bone marrow aspiration and biopsy, chest x-ray, and PET/CT or CT throughout the study. Additionally, patients may also undergo liver ultrasonographic elastography at screening at discretion of investigator and brain MRI or CT, CSF specimen collection, and ECHO or MUGA throughout the study.
Biological: Autologous BAFFR-targeting CAR T Cells · Procedure: Biospecimen Collection · Procedure: Bone Marrow Aspiration · Procedure: Bone Marrow Biopsy · Procedure: Bridge Therapy · Procedure: Chest Radiography · Procedure: Computed Tomography · Drug: Cyclophosphamide · Procedure: Echocardiography Test · Drug: Fludarabine · Procedure: Leukapheresis · Procedure: Magnetic Resonance Imaging · Procedure: Multigated Acquisition Scan · Procedure: Positron Emission Tomography · Procedure: Ultrasonographic Elastography
Given IV
Also known as: Autologous BAFFR-CAR T Cells, Autologous BAFFR-CAR-expressing T-cells
Undergo blood and CSF specimen collection
Also known as: Biological Sample Collection, Biospecimen Collected, Sample Collection, Specimen Collection
Undergo bone marrow aspiration and biopsy
Undergo bone marrow aspiration and biopsy
Also known as: Biopsy of Bone Marrow, Biopsy, Bone Marrow
Receive bridging therapy
Also known as: Holding Therapy
Undergo chest x-ray
Also known as: Chest X-ray
Undergo CT or PET/CT
Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized axial tomography (procedure), Computerized Tomography, Computerized Tomography (CT) scan, CT, CT Scan, Diagnostic CAT Scan, Diagnostic CAT Scan Service Type, tomography
Given IV
Also known as: (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Asta B 518, B 518, B-518, B518, Carloxan, Ciclofosfamida, Ciclofosfamide, Cicloxal, Clafen, Claphene, CP monohydrate, CTX, CYCLO-cell, Cycloblastin, Cycloblastine, Cyclophospham, Cyclophosphamid monohydrate, Cyclophosphamide Monohydrate, Cyclophosphamidum, Cyclophosphan, Cyclophosphane, Cyclophosphanum, Cyclostin, Cyclostine, Cytophosphan, Cytophosphane, Cytoxan, Fosfaseron, Frindovyx, Genoxal, Genuxal, Ledoxina, Mitoxan, Neosar, Revimmune, Syklofosfamid, WR 138719, WR- 138719, WR-138719, WR138719
Undergo ECHO
Also known as: EC, Echocardiography
Given IV
Also known as: Fluradosa
Undergo leukapheresis
Also known as: Leukocyte Adsorptive Apheresis, Leukocytopheresis, Therapeutic Leukopheresis, White Blood Cell Reduction Apheresis
Undergo brain MRI
Also known as: Magnetic Resonance, Magnetic Resonance Imaging (MRI), Magnetic resonance imaging (procedure), Magnetic Resonance Imaging Scan, Medical Imaging, Magnetic Resonance / Nuclear Magnetic Resonance, MR, MR Imaging, MRI, MRI Scan, MRIs, NMR Imaging, NMRI, Nuclear Magnetic Resonance Imaging, sMRI, Structural MRI
Undergo MUGA
Also known as: Blood Pool Scan, Equilibrium Radionuclide Angiography, Gated Blood Pool Imaging, Gated Heart Pool Scan, MUGA, MUGA Scan, Multi-Gated Acquisition Scan, Radionuclide Ventriculogram Scan, Radionuclide Ventriculography, RNV Scan, RNVG, SYMA Scanning, Synchronized Multigated Acquisition Scanning
Undergo PET/CT
Also known as: Medical Imaging, Positron Emission Tomography, PET, PET Scan, Positron emission tomography (procedure), Positron Emission Tomography Scan, Positron-Emission Tomography, PT
Undergo liver ultrasonographic elastography
Also known as: Ultrasound Elastography
Incidence of adverse events
Will be graded using Common Terminology Criteria for Adverse Events version 5.0, American Society for Transplantation and Cellular Therapy Consensus Criteria on Cytokine Release Syndrome/Neurotoxicity, graft-versus-host disease (GVHD) criteria, and Immune Effector Cell-Associated Hemophagocytic Lymphohistiocytosis-Like Syndrome identification and grading. Will be summarized by organ involved, severity, time of onset, and attribution.
Time frame: Up to 28 days after chimeric antigen receptor (CAR) T cells
Dose-limiting toxicity
Will be described individually.
Time frame: From the start of CAR T infusion up to 28 days
Disease response rate
Will be defined as complete response (CR) or CR with incomplete blood count recovery or CR with partial hematological recovery. Will be evaluated using European LeukemiaNet criteria. Rates and associated 95% binomial exact confidence limits will be estimated.
Time frame: At 4 weeks
Minimal residual disease negative rate
Will be defined by malignant cells \< 0.01% by flow cytometry or clonoSEQ. Rates and associated 95% binomial exact confidence limits will be estimated.
Time frame: At 4 weeks
Duration of B-cell aplasia
Will be measured by serum immunoglobulin G level. Will be summarized by descriptive statistics.
Time frame: Up to 15 years
Severity of GVHD in recipients of prior allogeneic hematopoietic stem cell transplantation
Will be defined per Keystone criteria for acute GVHD and revised National Institutes of Health consensus on grading of chronic GVHD. Competing risk method will be used to estimate.
Time frame: Within 8 weeks after T cell infusion
Progression-free survival
Kaplan-Meier product limit method with log-log transformation for the confidence interval will be used to estimate.
Time frame: From T cell infusion to the first observation of disease relapse/progression or death from any cause, whichever occurs first, assessed up to 15 years
Overall survival
Kaplan-Meier product limit method with log-log transformation for the confidence interval will be used to estimate.
Time frame: From T cell infusion to death from any cause, assessed up to 15 years
This study is not yet recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drugs tested here: Cyclophosphamide · Fludarabine