Skip to main content

Rituximab and Zanubrutinib in Patients With Indolent B-cell Lymphomas

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment43 people
  • Recruiting US sites1
  • SponsorH. Lee Moffitt Cancer Center and Research Institute
  • RegistryNCT06350318

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

Rituximab and Zanubrutinib in Patients With Indolent B-cell Lymphomas: a one-minute explainerNCT063503181 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age18 Years to no maximum
  • SexAll
  • Healthy volunteersNo

You may be able to join if

  • Cohort A: Previously untreated MZL. Prior therapy with H. Pylori antibiotic therapy or hepatitis C antiviral therapy are allowed on Cohort A.
  • Cohort B: Previously untreated FL
  • Pathological confirmation of lymphoma: availability of archival tissue confirming diagnosis of MZL (cohort A) or FL (cohort B). Availability of formalin-fixed, paraffin-embedded (FFPE) archival tumor specimens from within past 18 months from screening and pathological diagnosis confirmed by a pathologist at the participating site or willingness of the participant to undergo a fresh tumor biopsy if adequate archival tissue not available is required. This includes:
  • MZL (Cohort A):
  • Nodal MZL requiring systemic therapy
  • Splenic MZL requiring systemic therapy
  • Extra-nodal marginal zone lymphoma:
  • Non-gastric/non-cutaneous MZL requiring systemic therapy.
  • Cutaneous MZL will be eligible only if they have pathologically confirmed extra-cutaneous disease.
  • Gastric MZL only if advanced stage disease requiring systemic therapy (e.g., stage IIE, II2, IV- supradiaphragmatic nodal or disseminated extranodal disease such as bone marrow or additional extra nodal sites.
  • FL (Cohort B):
  • a. Pathological grade 1, 2, or 3a based on the World Health Organization (WHO 2008) classification of tumors of hematopoietic and lymphoid tissue.
  • Please note, grade 3B are excluded.
  • All participants must have disease requiring systemic therapy rather than local radiation (ie, stage II only if not eligible for radiation therapy or with stage III/IV).
  • All participants should have measurable disease. Measurable disease is defined as a lymph node or tumor mass that is ≥ 1.5 cm in at least one dimension by CT or the CT portion of the PET/CT.
  • Documentation of CD20+ status.
  • All participants must have an indication for therapy such as: symptoms attributable to lymphoma, threatened end-organ function, or cytopenia secondary to lymphoma.
  • All participants must be 18 years of age or older.
  • All participants must have an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-2.
  • All participants must be able to swallow whole pills.
  • All participants must have the ability and willingness to comply with the requirements of the study protocol.
  • All female participants who are of non-reproductive potential (i.e., post-menopausal by history - no menses for ≥1 year; OR history of hysterectomy; OR history of bilateral tubal ligation; OR history of bilateral oophorectomy).
  • All female participants of childbearing potential must have a negative serum pregnancy test upon study entry.
  • All male and female participants of reproductive potential who agree to use both a highly effective method of birth control (e.g., implants, injectables, combined oral contraceptives, some intrauterine devices [IUDs], complete abstinence, or sterilized partner) and a barrier method (e.g., condoms, vaginal ring, sponge, etc) during the period of therapy. Female participants of reproductive potential who are not surgically sterile must practice adequate birth control for a minimum of 30 days after last dose of zanubrutinib or 12 months after last dose of rituximab, whichever is longer. Male participants are eligible if abstinent, vasectomized, or if they agree to the use of barrier contraception in combination with other methods described above during the study treatment period and for ≥ 30 days after the last dose of zanubrutinib, or 12 months after the last dose of rituximab, whichever is longer.
  • All participants must have adequate organ function.

You cannot join if

  • Prior therapy for lymphoma including chemotherapy or immunotherapy. Participant may have received corticosteroids but should be off them 5 days prior to study entry.
  • Prior exposure to a BTK inhibitor.
  • Known prior significant hypersensitivity to rituximab (not including infusion reactions).
  • Prior history of malignancies unless the patient has been disease free for ≥ 2 years. Exceptions include basal cell carcinoma or squamous cell carcinoma of the skin; carcinoma in situ of cervix; carcinoma in situ of breast, localized prostate cancer, or superficial bladder cancer that has undergone curative therapy.
  • Participants with evidence of large B cell transformation or other aggressive histology (such as large cells seen on biopsy or high PET avidity in a single node seen on PET scan) are not eligible.
  • Known central nervous system (CNS) involvement by lymphoma.
  • Known bleeding disorders (e.g., von Willebrand's disease or hemophilia).
  • Concomitant use of warfarin or other Vitamin K antagonists.
  • Requires ongoing treatment with a moderate or strongCYP3A inhibitor or inducer.
  • Known active bacterial, viral, fungal, mycobacterial, or other infection (excluding fungal infections of nail beds) or any major episode of infection requiring treatment with IV antibiotics or hospitalization (related to the completion of the course of antibiotics) within 4 weeks before the start of Cycle 1.
  • Known infection with human immunodeficiency virus (HIV).
  • Viral Hepatitis:
  • Participants with active hepatitis B defined by hepatitis B surface antigen positivity or core antibody positivity in the presence of detectable serum hepatitis B DNA viremia are not eligible for this study.
  • Participants with a positive hepatitis B core antibody but with negative hepatitis B DNA may be considered for participation, but must agree to receive appropriate hepatitis B antiviral therapy while on rituximab and have hepatitis B DNA monitored with real-time PCR by the treating physician. These patients should be referred to a hepatologist or gastroenterologist for appropriate monitoring and management.
  • Hepatitis C: Patients with positive hepatitis C serology unless HCV RNA is confirmed negative by PCR.
  • Vaccination with a live vaccine ≤ 28 days prior to the start of treatment.
  • Participants should not have a history of uncontrolled seizures.
  • Currently active, clinically significant cardiovascular disease, such as uncontrolled arrhythmia or Class 3 or 4 congestive heart failure as defined by the New York Heart Association Functional Classification; or a history of myocardial infarction, unstable angina, or acute coronary syndrome within 6 months prior to enrollment on the study.
  • Uncontrolled hypertension as indicated by a minimum of 2 consecutive blood pressure measurements showing systolic blood pressure > 170 mmHg and diastolic blood pressure > 105 mmHg at screening.
  • Participants should not have a stroke or intracranial hemorrhage within last 6 months.
  • Participants may not have had major surgery within 28 days of enrollment, or minor surgery within 7 days of enrollment. Examples of minor surgery include dental surgery, insertion of a venous access device, skin biopsy, or aspiration of a joint. The decision about whether a surgery is major or minor can be made at the discretion of the treating physician.
  • Any life-threatening illness, medical condition, or organ system dysfunction that, in the investigator's opinion, could compromise the subject's safety or put the study outcomes at undue risk.

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

zanubrutinib. An inhibitor of Bruton's tyrosine kinase (BTK) with potential antineoplastic activity. Upon administration, zanubrutinib inhibits the activity of BTK and prevents the activation of the B-cell antigen receptor (BCR) signaling pathway. This prevents both B-cell activation and BTK-mediated activation of downstream survival pathways, which leads to the inhibition of the growth of malignant B-cells that overexpress BTK. BTK, a member of the Src-related BTK/Tec family of cytoplasmic tyrosine kinases, is overexpressed in B-cell malignancies; it plays an important role in B-lymphocyte development, activation, signaling, proliferation and survival. NCI Drug Dictionary

R-CHOP regimen. A regimen consisting of cyclophosphamide, doxorubicin, prednisone, rituximab and vincristine that may be used for the treatment of AIDS-related B-cell lymphomas, Castleman disease, chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL), diffuse large B-cell lymphoma (DLBCL), follicular lymphoma, gastric and nongastric MALT lymphomas, nodular lymphocyte-predominant Hodgkin lymphoma, mantle cell Lymphoma, nodal marginal zone lymphoma (NMZL), splenic marginal zone lymphoma (SMZL), Waldenström macroglobulinemia and lymphoplasmacytic lymphoma, and post-transplant lymphoproliferative disorders. NCI Drug Dictionary

Treatments listed in the registry

  • Zanubrutinib (Drug): Zanubrutinib is an anti-cancer medication administered orally.
  • Rituximab (Drug): Rituximab is a biologic medication administered intravenously or subcutaneously.

The study

Treatment groups

Non Randomized · Parallel · masking: None

Cohort A: Untreated Marginal Zone Lymphoma (Experimental)

Rituximab (Standard of Care) will be administered for up to 6 cycles (28-day cycles). Cycle 1: Days 1, 8, 15, and 22. Cycle 2-6: Day 1, every 28 days. Rituximab: Intravenous rituximab formulations (IV rituximab or IV rituximab biosimilars will be administered by IV infusion at a dose of 375 mg/m2 per local institutional guidelines) or subcutaneous rituximab formulations (RITUXAN HYCELA) 1,400 mg/23,400 Units (1,400 mg rituximab and 23,400 Units hyaluronidase human) subcutaneously at a fixed dose per local institutional guidelines. Zanubrutinib 320 mg will be administered orally once daily starting on day 1 of cycle 1. Zanubrutinib will be continued once daily for up to 24 cycles or until disease progression or unacceptable toxicity occurs.

Cohort B: Untreated Follicular Lymphoma (Experimental)

Rituximab (Standard of Care) will be administered for up to 6 cycles (28-day cycles). Cycle 1: Days 1, 8, 15, and 22. Cycle 2-6: Day 1, every 28 days. Rituximab: Intravenous rituximab formulations (IV rituximab or IV rituximab biosimilars will be administered by IV infusion at a dose of 375 mg/m2 per local institutional guidelines) or subcutaneous rituximab formulations (RITUXAN HYCELA) 1,400 mg/23,400 Units (1,400 mg rituximab and 23,400 Units hyaluronidase human) subcutaneously at a fixed dose per local institutional guidelines. Zanubrutinib 320 mg will be administered orally once daily starting on day 1 of cycle 1. Zanubrutinib will be continued once daily for up to 24 cycles or until disease progression or unacceptable toxicity occurs.

Goals

What the study measures

Main goals

  • Overall Response Rate: Cohort A (Up to 6 Months)
  • Overall Response Rate: Cohort B (Up to 6 Months)

Other goals

  • Efficacy of Zanubrutinib and Rituximab
  • Safety and tolerability of combination Zanubrutinib and Rituximab

Planned enrollment: 43 (estimated).

Where

Recruiting US sites

  • Moffitt Cancer Center, Tampa, Florida

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Sep 27, 2026. Public record; not medical advice.

For you, or someone you love

Whether or not this trial is the one, bring AI into your corner.

A complex diagnosis brings new questions every week, in a trial and out of one. Triangle keeps your whole medical file together, reads it with you in plain language, and helps you and your family decide what to ask next.

Start your 7-day free trial

Then $9 a month. Cancel anytime.

  • Every record in one place

    Requested from your hospitals and clinics through the national networks. Add scans, pathology and anything on paper.

  • Read in plain words

    Reports explained as they come in, with lab values you can follow before treatment, during a trial and after.

  • Ready for every appointment

    Ask about your own file, and walk in with questions for your oncologist or the trial team.

  • Your people, in the loop

    Share one profile with the family helping you, and with your doctors.

Members also get a deeper analysis of their records and any sequencing data, including clinical trials that may fit, reviewed by a licensed physician before they receive it.

Already in a trial?

It turns into a project to manage: visits, scans, labs, side effects and paperwork. Triangle keeps it organized in one place for you or for whoever's helping.

Organize my trial

7-day free trial, then $9 a month. Cancel anytime.