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A Study of Nemtabrutinib vs Chemoimmunotherapy for Participants With Previously Untreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL) Without TP53 Aberrations (MK-1026-008, BELLWAVE-008)

A Phase 3, Randomized Study to Compare the Efficacy and Safety of Nemtabrutinib Versus Chemoimmunotherapy for Previously Untreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma Without TP53 Aberrations

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05624554
Enrollment
300
Registered
2022-11-22
Start date
2023-03-16
Completion date
2031-03-17
Last updated
2026-03-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma

Brief summary

Researchers are looking for new ways to treat people with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL). CLL and SLL are types of blood cancer. Researchers want to know if people who take nemtabrutinib compared to those who take the standard treatments in this study will live longer without their cancer growing, spreading or returning (progression free survival).

Interventions

DRUGNemtabrutinib

65 mg administered orally daily until disease progression, unacceptable toxicity, or discontinuation criteria met.

DRUGFludarabine

25 mg/m\^2 administered via intravenous (IV) infusion on Days 1, 2, and 3 of each 28-day cycle up to 6 cycles.

DRUGCyclophosphamide

250 mg/m\^2 administered via IV infusion on Days 1, 2, and 3 of each 28-day cycle up to 6 cycles.

DRUGBendamustine

Administered via IV infusion on Days 1 and 2 of each 28-day cycle up to 6 cycles. The first dose is given as 70 to 90 mg/m\^2. Subsequent doses may be escalated up to 90 mg/m\^2, if applicable and as per local guidelines.

BIOLOGICALRituximab

Administered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.

BIOLOGICALTruxima

Administered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.

BIOLOGICALRuxience

Administered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.

BIOLOGICALRiabni

Administered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

The main inclusion and

Exclusion criteria

include but are not limited to the following: Inclusion Criteria: * Confirmed diagnosis of chronic lymphocytic leukemia (CLL)/ small lymphocytic lymphoma (SLL) and active disease clearly documented to have a need to initiate therapy * Has previously untreated CLL/SLL participants without tumor protein 53 (TP53) aberrations and documented 11q status and immunoglobulin heavy chain gene (IGHV) mutational status * The ability to swallow and retain oral medication

Design outcomes

Primary

MeasureTime frameDescription
Progression-Free Survival (PFS) per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) Criteria 2018 as Assessed by Blinded Independent Central Review (BICR)Up to approximately 49 monthsPFS is defined as the time from randomization to the first documented progressive disease (PD) or death due to any cause, whichever occurs first. PD is evaluated per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) criteria 2018 as assessed by blinded independent central review (BICR).

Secondary

MeasureTime frameDescription
Overall Survival (OS)Up to approximately 94 monthsOS is defined as the time from randomization to death due to any cause.
Objective Response Rate (ORR) per iwCLL Criteria 2018 as Assessed by BICRUp to approximately 36 monthsORR is defined as the percentage of participants with complete response (CR), complete response with an incomplete recovery of the participant's bone marrow (CRi), nodular partial response (nPR), or Partial response (PR), per iwCLL criteria 2018 as assessed by BICR.
Time to Next Therapy (TTNT)Up to approximately 94 monthsTTNT is defined as the time from randomization to initiation of the first dose of a new systemic anticancer therapy for chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL) or death due to any cause, whichever occurs first.
Duration of Response (DOR) per iwCLL Criteria 2018 as Assessed by BICRUp to approximately 94 monthsFor participants who demonstrate a CR, CRi, nPR, or PR per iwCLL criteria as assessed by BICR, DOR is defined as the time from the first documented evidence of CR, CRi, nPR, or PR that led to response until disease progression or death due to any cause, whichever occurs first.
Number of Participants Who Experience an Adverse Event (AE)Up to approximately 94 monthsAn AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention.
Number of Participants Who Discontinue Study Treatment Due to an AEUp to approximately 94 monthsAn AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention.

Countries

Australia, Brazil, Bulgaria, Chile, China, Colombia, Denmark, Guatemala, Hong Kong, Hungary, Lithuania, Malaysia, Mexico, Poland, Romania, Singapore, South Africa, Taiwan, Turkey (Türkiye), Ukraine, United States

Contacts

STUDY_DIRECTORMedical Director

Merck Sharp & Dohme LLC

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 17, 2026