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A Study of Pirtobrutinib (LOXO-305) Versus Bendamustine Plus Rituximab (BR) in Untreated Patients With Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL)

A Phase 3 Open-Label, Randomized Study of Pirtobrutinib (LOXO-305) Versus Bendamustine Plus Rituximab in Untreated Patients With Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05023980
Acronym
BRUIN CLL-313
Enrollment
309
Registered
2021-08-27
Start date
2021-09-23
Completion date
2027-10-01
Last updated
2026-01-22

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

Keywords

BTKi, BTK Inhibitor, Hematologic Disease, Lymphoma, non-Hodgkin's, Lymphoma, B-cell

Brief summary

The purpose of this study is to compare the efficacy and safety of pirtobrutinib (LOXO-305; Arm A) compared to BR (Arm B) in patients with CLL/SLL who have not been treated. Participation could last up to five years.

Interventions

DRUGPirtobrutinib

Oral

DRUGBendamustine

IV

DRUGRituximab

IV

Sponsors

Loxo Oncology, Inc.
Lead SponsorINDUSTRY
Eli Lilly and Company
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Eligible patients will be randomized 1:1 into Arm A and Arm B. Patients randomized to Arm B who have disease progression (PD) confirmed by independent review committee (IRC) may be eligible to crossover into Arm A.

Eligibility

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

Inclusion criteria

* Confirmed diagnosis of CLL/SLL requiring therapy, per iwCLL 2018 criteria * Eastern Cooperative Oncology Group (ECOG) Performance Status 0-2 * Adequate organ function * Platelets greater than or equal to (≥)75 x 10⁹/liter (L) (≥50 × 10⁹/L for patients with evidence of bone marrow infiltrate), hemoglobin ≥8 grams/deciliter (g/dL), and absolute neutrophil count ≥0.75 x 10⁹/L * Kidney function: Estimated creatinine clearance ≥40 milliliters per minute (mL/min)

Exclusion criteria

* Known or suspected Richter's transformation at any time preceding enrollment * Prior systemic therapy for CLL/SLL * Presence of 17p deletion * Central nervous system (CNS) involvement * Active uncontrolled auto-immune cytopenia (e.g., autoimmune hemolytic anemia \[AIHA\], idiopathic thrombocytopenic purpura \[ITP\]) * Significant cardiovascular disease * Active hepatitis B or hepatitis C * Active cytomegalovirus (CMV) infection * Active uncontrolled systemic bacterial, viral, fungal, or parasitic infection * Known human immunodeficiency virus (HIV) infection, regardless of cluster of differentiation 4 (CD4) count * Concurrent use of investigational agent or anticancer therapy except hormonal therapy * Patients requiring therapeutic anticoagulation with warfarin or another Vitamin K antagonist * Vaccination with a live vaccine within 28 days prior to randomization * Patients with the following hypersensitivity: * Known hypersensitivity, including anaphylaxis, to any component or excipient of pirtobrutinib or bendamustine * Prior significant hypersensitivity to rituximab

Design outcomes

Primary

MeasureTime frameDescription
To evaluate progression-free survival (PFS) of pirtobrutinib (Arm A) compared to bendamustine and rituximab (Arm B)Up to approximately 5 yearsAssessed by blinded independent review committee (IRC) per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) 2018 Response Criteria

Secondary

MeasureTime frameDescription
To evaluate the effectiveness of Arm A compared to Arm B: Progression-free survival (PFS)Up to approximately 5 yearsAssessments of effectiveness include PFS, assessed by investigator
To evaluate the effectiveness of Arm A compared to Arm B: Overall survival (OS)Up to approximately 5 yearsAssessments of effectiveness include OS, assessed by investigator
To evaluate the effectiveness of Arm A compared to Arm B: Time to next treatment (TTNT)Up to approximately 5 yearsAssessments of effectiveness include TTNT, assessed by investigator
To evaluate the effectiveness of Arm A compared to Arm B: Overall response rate (ORR)Up to approximately 5 yearsAssessments of effectiveness include ORR, assessed by investigator and IRC
To evaluate the effectiveness of Arm A compared to Arm B: Duration of Response (DOR)Up to approximately 5 yearsAssessments of effectiveness include DOR, assessed by investigator and IRC
To evaluate the effectiveness of Arm A compared to Arm B in patient-reported disease-related symptomsUp to approximately 5 yearsBased on time to worsening of CLL/SLL-related symptoms
To evaluate the effectiveness of Arm A compared to Arm B in patient-reported physical functioningUp to approximately 5 yearsBased on time to worsening of physical functioning

Countries

Australia, Austria, Brazil, Bulgaria, China, Czechia, France, Hungary, Italy, Japan, New Zealand, Poland, Portugal, Romania, Russia, South Korea, Spain, Taiwan, United Kingdom, United States

Contacts

STUDY_DIRECTORCall 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern time (UTC/GMT - 5 hours, EST)

Eli Lilly and Company

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 29, 2026