NCT06784726 · University of Washington
Odronextamab for Relapsed and Refractory Large B-cell Lymphomas Before CAR-T
What this study is about
This phase II trial tests the effectiveness of odronextamab given before chimeric antigen receptor T (CAR-T) cell therapy (bridging therapy) in patients with large B-cell lymphomas that have come back after a period of improvement (relapsed) or that have not responded to previous treatment (refractory). Odronextamab is a bispecific antibody that can bind to two different antigens at the same time.
View original scientific description
This phase II trial tests the effectiveness of odronextamab given before chimeric antigen receptor T (CAR-T) cell therapy (bridging therapy) in patients with large B-cell lymphomas that have come back after a period of improvement (relapsed) or that have not responded to previous treatment (refractory). Odronextamab is a bispecific antibody that can bind to two different antigens at the same time. Odronextamab binds to CD3, a T-cell surface antigen, and CD20 (a tumor-associated antigen that is expressed on B-cells during most stages of B-cell development and is often overexpressed in B-cell cancers) and may interfere with the ability of cancer cells to grow and spread. Bridging therapy has been used to maintain disease control and to increase the chance of successful receipt of CAR-T cell therapy. However, bridging therapy is typically given after leukapheresis, which does not help prevent disease progression between the decision for CAR-T cell therapy and leukapheresis. Giving odronextamab as bridging therapy before leukapheresis may delay disease progression to allow leukapheresis and increase the likelihood of successful CAR-T cell therapy in patients with relapsed or refractory large B-cell lymphomas.
Interventions
BIOLOGICAL
Odronextamab
Given IV
PROCEDURE
Biospecimen Collection
Undergo collection of blood and oral or rectal swab samples
PROCEDURE
Bone Marrow Aspiration
Undergo bone marrow aspiration
PROCEDURE
Bone Marrow Biopsy
Undergo bone marrow biopsy
BIOLOGICAL
Chimeric Antigen Receptor T-Cell Therapy
Undergo CAR-T cell therapy
PROCEDURE
Computed Tomography
Undergo PET/CT
PROCEDURE
Leukapheresis
Undergo leukapheresis
PROCEDURE
Lumbar Puncture
Undergo lumbar puncture
PROCEDURE
Positron Emission Tomography
Undergo PET/CT
OTHER
Questionnaire Administration
Ancillary studies
PROCEDURE
Biopsy Procedure
Undergo tissue biopsy
Primary outcome measures
Failure to undergo leukapheresis
Time frame: Up to 5 years
Will include failures due to disease progression or adverse events (AEs) due to odronextamab (Odron), or requirement of other lymphoma-directed therapy for bridging before leukapheresis due to lack of response. Will report the total number and percentage with 95% confidence interval (CI).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Histologically confirmed large B cell lymphoma, including diffuse large B-cell lymphoma (DLBCL) not otherwise specified, primary mediastinal large B-cell lymphoma, high grade B-cell lymphoma, DLBCL arising from indolent lymphoma, follicular lymphoma (FL) grade 3B
- Measurable disease, defined as at least one measurable lesion ≥ 15 mm on PET, CT, or magnetic resonance imaging (MRI) within one month of screening, according to the International Working Group consensus response evaluation criteria in lymphoma
- Prior frontline therapy for large B cell lymphoma must have failed the patient, and criteria must be met for receiving commercial axicabtagene ciloleucel (axi-cel), lisocabtagene maraleucel (liso-cel), or tisagenlecleucel (tisa-cel) per Food and Drug Administration (FDA) label
- Age ≥ 18 years
- Capable of understanding and providing a written informed consent
- Prior treatment with an anti-CD20 antibody therapy
- Eastern Cooperative Oncology Group performance status of 0-1; we allow enrollment of patients with a performance status of 2 if it is attributed to lymphoma per discretion of the treating physician or principal investigator (PI)
- Creatinine clearance ≥ 45 mL/min calculated by Cockcroft-Gault equation
- Total bilirubin ≤ 1.5 x the upper limit of normal (ULN), except in patients with Gilbert's syndrome
- Aspartate aminotransferase and alanine aminotransferase ≤ 2.5 x the ULN
- Adequate pulmonary function, defined as ≤ grade 1 dyspnea and oxygen saturation (SpO2) ≥ 92% on room air
- Adequate cardiac function, defined as left ventricular ejection fraction ≥ 50% and without evidence for pericardial effusion
- Platelet count ≥ 75 x 10\^9 /L
- Hemoglobin (Hg) level ≥ 9 g/dL
- Absolute neutrophil count (ANC) ≥ 1 x 10\^9 /L
- Patients with bone marrow involvement or splenic sequestration: Platelet count ≥ 25 x 10\^9 /L
- Patients with bone marrow involvement or splenic sequestration: Hg ≥ 7.0 g/dL
- Patients with bone marrow involvement or splenic sequestration: ANC ≥ 0.5 x 10\^9 /L
- Negative serum pregnancy test within 2 days of initiating odronextamab for women of childbearing potential (WOCBP), defined as those who have not been surgically sterilized or who have not been free of menses for at least 1 year
- Fertile male and WOCBP patients must be willing to use highly effective contraceptive methods from study recruitment to at least 6 months after the CAR T-cell infusion
- Patients must not provide egg or sperm donation until at least 6 months after the completion of the last dose of Odron
Exclusion criteria
- Detectable cerebrospinal fluid malignant cells, or brain metastases, or with a history of cerebrospinal fluid malignant cells or brain metastases. Patients with a history of secondary central nervous system (CNS) lymphoma may be eligible provided that there has been no evidence of CNS disease from lymphoma for at least 3 months at the time of screening
- History of a seizure disorder, cerebrovascular ischemia/hemorrhage, dementia, cerebellar disease, or any autoimmune disease with central nervous system (CNS) involvement
- Standard anti-neoplastic chemotherapy (non-biologic) within 5-times the half-life or within 2 weeks, whichever is shorter, prior to first administration of study drug
- Standard radiotherapy within 2 weeks of first administration of study drug
- Prior treatment with an anti-CD20 x anti-CD3 bispecific therapy, unless all the following are met: disease responded to prior bispecific therapy (CR or PR per Lugano criteria) and did not experience disease progression within 12 months of the last dose of prior bispecific therapy, and the tumor must still express CD20 (CD20 examination per standard of care \[SOC\])
- Allogeneic stem cell transplantation
- Any CAR-T cell therapy
- Patients may not be receiving other investigational agents
- Treatment with rituximab, alemtuzumab, or other investigational or commercial biologic agent within 2 weeks prior to first administration of study drug
- Immunosuppressive therapy (other than biologic) within 2 weeks of first administration of study drug
- Treatment with an investigational non-biologic agent within 2 weeks of first administration of study drug
- History of allergic reactions attributed to compounds of similar chemical or biologic composition of study drug
- History of hypersensitivity to any compound in the tetracycline antibiotics group
- Concurrent active malignancy for which the patient is receiving systemic treatment, unless approved by PI
- Known active and uncontrolled bacterial, viral, fungal, mycobacterial, or other infection
- Evidence of significant concurrent disease or medical condition that could interfere with the conduct of the study, or put the patient at significant risk including, but not limited to, significant cardiovascular disease (e.g., New York Heart Association class III or IV cardiac disease, myocardial infarction within the previous 6 months, unstable arrhythmias, or unstable angina) and/or significant pulmonary disease (e.g., obstructive pulmonary disease and history of symptomatic bronchospasm)
- Ongoing systemic corticosteroid treatment, with the exception of corticosteroid use for other (non-tumor and non-immunosuppressive) indications up to a maximum of 10 mg/day of prednisone or equivalent. A short course of corticosteroid for lymphoma disease control during screening is allowed
- Infection with human immunodeficiency virus (unless viral load is undetectable and CD4 count ≥ 400) or chronic infection with hepatitis B virus or hepatitis C virus. Patients with hepatitis B (hepatitis B surface antigen positive \[HepBsAg+\]) with controlled infection were permitted upon consultation with the physician managing the infection
- Known hypersensitivity to both allopurinol and rasburicase
- Pregnant or breast-feeding women
- Administration of live vaccination within 28 days of first administration of study drug
Where
- Seattle, Washington
Collaborators
Regeneron Pharmaceuticals
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced May 6, 2026 · Source of record for eligibility and locations