A Study of NX-5948 in Adults With CLL/SLL Previously Treated With a Bruton's Tyrosine Kinase Inhibitor and a B-cell Lymphoma-2 Inhibitor (DAYBreak CLL-201)
A Single-arm, Phase 2, Open-label, Multicenter Study to Evaluate NX-5948 in Adults With Relapsed/Refractory (R/R) Chronic Lymphocytic Leukemia (CLL) or Small Lymphocytic Lymphoma (SLL) Previously Exposed to a Bruton's Tyrosine Kinase Inhibitor (BTKi) and a B-cell Lymphoma-2 Inhibitor (BCL-2i)
Nurix Therapeutics, Inc.
100 participants
Oct 15, 2025
INTERVENTIONAL
Conditions
Summary
This is a study for patients with relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) who have previously received treatment with a BTK inhibitor (covalent and non-covalent) and a BCL-2 inhibitor. The main purpose of this study is to test if NX-5948 (bexobrutideg) works to treat patients with CLL/SLL. Participation could last up to 5 years, and possibly longer, if the disease does not progress.
Eligibility
Inclusion Criteria7
- Age: ≥ 18 years
- Confirmed relapsed/refractory CLL/SLL that meets iwCLL criteria for diagnosis and systemic treatment
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
- Must have received a covalent BTK inhibitor (BTKi), a non-covalent BTKi, and a BCL-2 inhibitor either in separate lines of treatment or in combination
- Measurable disease by radiographic assessment
- Adequate organ and bone marrow function
- Must sign an informed consent form indicating that he or she understands the purpose of the procedures required for the study and is willing to participate
Exclusion Criteria10
- Known or suspected prolymphocytic leukemia or Richter's transformation before entering study
- Investigational agent or anticancer therapy within 5 half-lives or 14 days (whichever is shorter) before planned start of study drug
- Antibody therapy must stop at least 4 weeks before the first dose of study drug
- No other systemic anticancer therapy is allowed at the same time as this study; exception: continuation of hormonal therapy for breast and prostate cancer is allowed, if they are not on the list of prohibited concomitant medications in this study
- Radiotherapy within 2 weeks of the first dose of study drug except for focal palliative radiation
- Use of systemic corticosteroids \>20 mg/day prednisone or equivalent within the 7 days before start of study drug except for those used as premedication for radio diagnostic contrast
- Use of systemic immunosuppressive drugs other than systemic corticosteroids within 60 days before the first dose of study drug
- Previously treated with a BTK degrader
- Previous chimeric antigen receptor (CAR) T-cell therapy or autologous hematopoietic cell transplant \<1 year prior to enrollment
- Thromboembolic events (eg, deep vein thrombosis, pulmonary embolism, or symptomatic cerebrovascular events), stroke, or intracranial hemorrhage within 6 months of planned start of study drug
Interventions
Oral dose administered once daily. NX-5948 will be given in continuous 28-day cycles.
Locations(18)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT07221500