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Recurrent Mantle Cell LymphomaPhase 1NCT06675123

Pacritinib in Combination With a BTK Inhibitor for the Treatment of Patients With Relapsed or Refractory Mantle Cell Lymphoma

A Phase 1 study testing Biopsy, Biospecimen Collection and Bone Marrow Aspiration in people with Recurrent Mantle Cell Lymphoma and Refractory Mantle Cell Lymphoma, run by City of Hope Medical Center at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This phase I trial tests the safety and side effects of pacritinib in combination with a Bruton's tyrosine kinase (BTK) inhibitor and how well it works in treating patients with mantle cell lymphoma that has come back after a period of improvement (relapsed) or that has not responded to previous treatment… Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Biopsy, Biospecimen Collection and Bone Marrow Aspiration
Could I receive a placebo?
No, everyone receives an active treatment
How many people
10 participants
Where
1 siteUnited States
Study dates
29 Sep 2026to 8 Mar 2028
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Documented informed consent of the participant and/or legally authorized representative
  • Be willing to provide tissue from a fresh core or excisional biopsy (performed as standard of care) of a tumor lesion prior to starting study therapy or from diagnostic tumor biopsies
  • If unavailable, exceptions may be granted with study principal investigator (PI) approval
  • Age: ≥ 18 years
  • Eastern Cooperative Oncology Group (ECOG) ≤ 2
  • Histologically confirmed diagnosis of mantle cell lymphoma according to the World Health Organization (WHO) classification with a characteristic immunophenotypic profile with CD5+, CD20+, and with either cyclin D1 expression by immunohistochemistry (IHC), or positive by fluorescence in situ hybridization (FISH) or cytogenetics for the t(11,14) translocation, or both. Patients whose tumor is negative for cyclin D1 expression are allowed providing hemato-pathology confirmation of the diagnosis of MCL
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  • Relapsed or refractory disease after at least 1 prior line of systemic therapy
  • Relapse must have been confirmed histologically with hematopathology review. Exceptions may be granted with study PI approval
  • Patient must be receiving treatment with single agent ibrutinib or another covalent BTK inhibitor (e.g., acalabrutinib, zanubrutinib), and must have previously achieved complete response (CR) or partial response (PR) to the BTK inhibitor, and must show evidence of progressive MCL at the time of enrollment
  • Radiographically measurable disease by Lugano criteria (e.g., one or more nodal sites of disease ≥ 1.5 cm and/or extranodal sites of disease ≥ 1.0 cm in longest dimension)
  • If measurable bone marrow involvement or circulating disease has been confirmed in the absence of radiographically measurable disease, exceptions may be granted with study PI approval
  • Fully recovered from the acute toxic effects (except alopecia) to ≤ grade 1 to prior anti-cancer therapy
  • WITHOUT BONE MARROW INVOLVEMENT: Absolute neutrophil count (ANC) ≥ 1,000/mm^3
  • NOTE: Growth factor is not permitted within 7 days of ANC assessment unless cytopenia is secondary to disease involvement
  • WITH BONE MARROW INVOLVEMENT: ANC ≥ 500/mm^3
  • NOTE: Growth factor is not permitted within 7 days of ANC assessment unless cytopenia is secondary to disease involvement
  • WITHOUT BONE MARROW INVOLVEMENT: Platelets ≥ 75,000/mm^3
  • NOTE: Platelet transfusions are not permitted within 7 days of platelet assessment unless cytopenia is secondary to disease involvement
  • WITH BONE MARROW INVOLVEMENT: Platelets ≥ 25,000/mm^3
  • NOTE: Platelet transfusions are not permitted within 7 days of platelet assessment unless cytopenia is secondary to disease involvement
  • Total bilirubin ≤ 4 x upper limit of normal (ULN) (If hepatic involvement by lymphoma, or Gilbert's disease: ≤ 3 x ULN)
  • Aspartate aminotransferase (AST) ≤ 3 x ULN (If hepatic involvement by lymphoma: AST ≤ 5 x ULN)
  • Alanine aminotransferase (ALT) ≤ 3 x ULN (If hepatic involvement by lymphoma: ALT ≤ 5 x ULN)
  • Creatinine clearance of ≥ 30 mL/min per 24 hour urine test or the Cockcroft-Gault formula
  • IF NOT RECEIVING ANTICOAGULANTS: International normalized ratio (INR) OR prothrombin (PT) ≤ 1.5 x ULN
  • IF ON ANTICOAGULANT THERAPY: PT must be within therapeutic range of intended use of anticoagulants
  • IF NOT RECEIVING ANTICOAGULANTS: Activated partial thromboplastin time (aPTT) ≤ 1.5 x ULN
  • Left ventricular ejection fraction (LVEF) ≥ 50%
  • Mean corrected QT interval (QTc) (calculated from 3 electrocardiograms using Fridericia formula) ≤ 480 ms
  • WOMEN OF CHILDBEARING POTENTIAL: (WOCBP): Negative urine or serum pregnancy test
  • If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required
  • Agreement by females and males of childbearing potential to abstain from heterosexual intercourse or use a highly effective method of birth control (defined as those resulting in a failure rate of < 1% per year) during the treatment period until at least 90 days after the last dose of pacritinib and until at least 30 days after the last dose of BTK inhibitor
  • Childbearing potential defined as not being surgically sterilized (men and women) or have not been free from menses for > 1 year (women only) with no identified cause other than menopause
  • Examples of contraceptive methods with a failure rate of < 1% per year include bilateral tubal ligation, male sterilization, hormone releasing intrauterine devices, and copper intrauterine devices. Note that oral contraceptives or progestin injection (e.g., Depo-Provera) alone are not considered highly effective methods of contraception on their own in combination with pacritinib; an additional barrier method (diaphragm with spermicidal gel or condoms with spermicide), double-barrier methods (diaphragm with spermicidal gel and condoms with spermicide), partner vasectomy, or total abstinence are required

Who cannot join

  • Autologous hematopoietic stem cell transplant within 3 months of day 1 of protocol therapy
  • Prior allogeneic stem cell transplant
  • Prior treatment with pacritinib or a janus kinase 2 (JAK2) inhibitor
  • Concomitant treatment with pirtobrutinib
  • Strong CYP3A4 inducers/ inhibitors within 14 days prior to day 1 of protocol therapy
  • Note: Shorter washout periods may be permitted with approval of the study PI, provided that the washout period is at least five half-lives of the drug prior to day 1 of protocol therapy
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  • Systemic treatment with medications that increase the risk of bleeding, including anticoagulants, antiplatelet agents (except for aspirin dosages of ≤ 100 mg per day), anti-vascular endothelial growth factor (anti-VEGF) agents, and daily use of cytochrome C oxidase subunit 1 (COX-1) inhibiting non-steroidal anti-inflammatory drugs (NSAIDs) within 14 days prior to day 1 of protocol therapy
  • Systemic treatment with medications with arrhythmogenic potential within 14 days prior to day 1 of protocol therapy. Shorter washout periods may be permitted with approval of the study PI, provided that the washout period is at least five half-lives of the drug prior to day 1 of protocol therapy
  • Systemic steroid therapy for any cause must be tapered down to ≤ 20 mg/day prednisone or equivalent. Exceptions are:
  • Use of brief (≤ 7 days) course of high dose corticosteroids (100 mg/day prednisone or equivalent) prior to initiation of study therapy for control of lymphoma-related symptoms
  • Inhaled or topical steroids
  • Use of mineralocorticoids for management of orthostatic hypotension
  • Use of physiologic doses of corticosteroids for management of adrenal insufficiency
  • Significant recent bleeding history defined as National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) grade ≥ 2 within 3 months prior to day 1 of protocol therapy, unless precipitated by an inciting event (e.g., surgery, trauma, or injury)
  • Known bleeding disorders (e.g., von Willebrand's disease or hemophilia)
  • Factors that increase the risk for QT interval prolongation (eg, hypokalemia [defined as serum potassium < 3.0 mEq/L that is persistent and refractory to correction], or history of long QT interval syndrome)
  • Clinically significant cardiovascular disease such as symptomatic arrhythmias, congestive heart failure, or myocardial infarction within 3 months of screening, any class III or IV cardiac disease as defined by the New York Heart Association (NYHA) Functional Classification, or any class C or D cardiac disease as defined by the NYHA Objective Assessment
  • Note: Subjects with controlled, asymptomatic atrial fibrillation/flutter can enroll on study
  • Inability to swallow and retain an oral medication
  • Any active gastro-intestinal or metabolic condition that could significantly interfere with absorption of oral medication
  • Active or uncontrolled inflammatory or chronic functional bowel disorder such as Crohn's disease, inflammatory bowel disease, chronic diarrhea, or chronic constipation
  • Known hypersensitivity to compounds of similar chemical composition to study agent or any of the following inactive ingredients: microcrystalline cellulose, polyethylene glycol, and magnesium stearate, or to loperamide or equivalent antidiarrheal medication
  • Known active central nervous system (CNS) involvement by lymphoma, including leptomeningeal involvement
  • Known history of progressive multifocal leukoencephalopathy (PML)
  • Prior or concurrent malignancy whose natural history or treatment could interfere with the safety or efficacy assessment of the protocol therapy
  • Known active bacterial, viral, fungal, mycobacterial, parasitic, or other infection (excluding fungal infections of nail beds) at study enrollment or any major episode of infection (as evaluated by the investigator) within 4 weeks prior to day 1 of protocol therapy
  • Known active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection. Testing to be done only in patients suspected of having infections or exposures. Patients with history of HBV infection (defined as negative hepatitis B surface antigen [HBsAg] and positive hepatitis B core antibody [HBcAb]) are eligible if HBV deoxyribonucleic acid (DNA) is undetectable, if they are willing to undergo DNA testing on day 1 of every cycle and every three months for at least 12 months after the last cycle of study treatment and appropriate antiviral therapy. Patients who are positive for HCV antibody are eligible if polymerase chain reaction (PCR) is negative for HCV RNA (PCR testing only required if HCV antibody testing is positive).
  • Known active human immunodeficiency virus (HIV) infection. Subjects who have an undetectable or unquantifiable HIV viral load with CD4 > 200 and are on highly active antiretroviral therapy (HAART) medication are allowed. Testing to be done only in patients suspected of having infections or exposures
  • FEMALES ONLY: Pregnant or breastfeeding
  • Any other condition that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures
  • Prospective participants who, in the opinion of the investigator, may not be able to comply with all study procedures (including compliance issues related to feasibility/logistics)

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United States1 site, 1 recruiting

  • City of Hope Medical Center

    Duarte, California, 91010

    Tycel J. Phillips, 626-256-4673 ext. 82405, tphillips@coh.org

    Tycel J. Phillips

    Recruiting

Other trials in United States

About this study

Official title: A Pilot Study of Pacritinib Combined With a BTK Inhibitor in Patients With Relapsed/Refractory Mantle Cell Lymphoma

This phase I trial tests the safety and side effects of pacritinib in combination with a Bruton's tyrosine kinase (BTK) inhibitor and how well it works in treating patients with mantle cell lymphoma that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). Pacritinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. BTK inhibitors block a protein called BTK which is present on B-cell (a type of white blood cell) cancers such as mantle cell lymphoma at abnormal levels. This may help keep tumor cells from growing and spreading. Giving pacritinib in combination with a BTK inhibitor may be safe, tolerable and/or effective in treating patients with relapsed or refractory mantle cell lymphoma.

Read the detailed description

PRIMARY OBJECTIVE:

  1. Obtain a preliminary estimate of the safety and tolerability of the combination of pacritinib with a covalent BTK inhibitor (e.g., ibrutinib, acalabrutinib, zanubrutinib) in patients with relapsed/refractory (R/R) mantle cell lymphoma (MCL).

SECONDARY OBJECTIVES:

  1. Obtain a preliminary estimate of the overall response rate (ORR) of the combination of pacritinib with a BTK inhibitor in patients with R/R MCL.

II. Obtain a preliminary estimate of the duration of response and progression-free survival in patients with R/R MCL treated with a combination of pacritinib with a BTK inhibitor.

EXPLORATORY OBJECTIVES:

  1. Explore the association between clinical outcomes, elimination of tumor associated macrophages (TAMs), and expression of IL-10.

II. Evaluate minimal residual disease (MRD) in patients who obtain a complete metabolic response to therapy.

OUTLINE:

Patients receive pacritinib orally (PO) twice daily (BID) on days 1-28 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients also continue to receive BTK inhibitor per standard of care. Additionally, patients undergo blood sample collection, optional tissue biopsy, bone marrow biopsy and aspiration and positron emission tomography (PET)/computed tomography (CT) throughout the study.

After completion of study treatment, patients are followed up at 30 days. Patients without progression are followed up every 3 months.

Being tested
Biopsy, Biospecimen Collection, Bone Marrow Aspiration, Bone Marrow Biopsy, BTK Inhibitor
Medical subject headings
Lymphoma, Mantle-Cell

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • BiopsyProcedure or surgery

    Also called BIOPSY_TYPE, Bx

    Undergo optional tissue biopsy

  • Biospecimen CollectionProcedure or surgery

    Also called Biological Sample Collection, Biospecimen Collected, Specimen Collection

    Undergo blood sample collection

  • Bone Marrow AspirationProcedure or surgery

    Undergo bone marrow biopsy and aspiration

  • Bone Marrow BiopsyProcedure or surgery

    Also called Biopsy of Bone Marrow, Biopsy, Bone Marrow

    Undergo bone marrow biopsy and aspiration

  • BTK InhibitorDrug

    Also called Tyrosine-Protein Kinase BTK Protein

    Given BTK inhibitor

  • Computed TomographyProcedure or surgery

    Also called CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography

    Undergo PET/CT

  • PacritinibDrug

    Also called Oral JAK2 Inhibitor SB1518, SB 1518, SB-1518, SB1518

    Given PO

  • Positron Emission TomographyProcedure or surgery

    Also called Medical Imaging, Positron Emission Tomography, PET, PET Scan, Positron emission tomography (procedure)

    Undergo PET/CT

Study groups in NCT06675123
Study groupRoleWhat they receive
Treatment (pacritinib, BTK inhibitor)ExperimentalPatients receive pacritinib PO BID on days 1-28 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients also continue to receive BTK inhibitor per standard of care. Additionally, patients undergo blood sample collection, optional tissue biopsy, bone marrow biopsy and aspiration and PET/CT throughout the study.
Receives: Procedure: Biopsy; Procedure: Biospecimen Collection; Procedure: Bone Marrow Aspiration; Procedure: Bone Marrow Biopsy; Drug: BTK Inhibitor; Procedure: Computed Tomography; Drug: Pacritinib; Procedure: Positron Emission Tomography

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of adverse events (AEs)

    Will be graded using National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0. AEs will be summarized by type, severity, and attribution.

    Measured: Up to 30 days after last dose of study drug

Secondary outcomes (3)

  1. Overall response rate (ORR)

    Will be defined as the proportion of response evaluable participants that achieve a best response of either complete metabolic response (CMR) or partial metabolic response (PMR) after the start of protocol therapy and prior to disease progression and/or start of other anti-lymphoma therapy. ORR will be estimated along with the 95% exact binomial confidence interval.

    Measured: Up 12 months

  2. Duration of response (DOR)

    DOR will be estimated using the product-limit method of Kaplan and Meier along with the Greenwood estimator of standard error, 95% confidence interval will be constructed based on log-log transformation. Median DOR will be estimated when available. Descriptive analyses may be done separately for particular Bruton's tyrosine kinase (BTK) inhibitor(s) depending on the number of patients treated.

    Measured: From the first achievement of PMR or CMR to time of progressive disease or death, whichever is earlier, assessed up to 12 months

  3. Progression-free survival (PFS)

    PFS will be estimated using the product-limit method of Kaplan and Meier along with the Greenwood estimator of standard error, 95% confidence interval will be constructed based on log-log transformation. Median PFS will be estimated when available. Descriptive analyses may be done separately for particular BTK inhibitor(s) depending on the number of patients treated.

    Measured: From start of protocol treatment to time of disease relapse/progression or death due to any cause, whichever occurs earlier, assessed up to 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 Nov 2024
  2. Study start29 Sep 2026
  3. Primary completion8 Mar 2028 (estimated)
  4. Study completion8 Mar 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
10 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06675123
Sponsor's protocol ID
23184
Other IDs
NCI-2024-08854, 23184, P30CA033572
Status last verified
Oct 2026
First submitted
4 Nov 2024
Last updated
14 Oct 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Biopsy, Biospecimen Collection and Bone Marrow Aspiration in people with Recurrent Mantle Cell Lymphoma and Refractory Mantle Cell Lymphoma, run by City of Hope Medical Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 34 inclusion and 31 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 14 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of adverse events (AEs) (time frame: Up to 30 days after last dose of study drug). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06675123.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Oct 2026.

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