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A Phase 3 Study of LOXO-305 in Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma

A Phase 3 Open-Label, Randomized Study of LOXO-305 versus Investigator's Choice of Idelalisib plus Rituximab or Bendamustine plus Rituximab in BTK Inhibitor Pretreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma - BRUIN CLL-321

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2021210031
Enrollment
250
Registered
2021-08-24
Start date
2022-02-14
Completion date
Unknown
Last updated
2026-06-29

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

Interventions

Drug: LOXO-305 Oral LOXO-305 Other Name: Pirtobrutinib Drug: Idelalisib Oral Other Name: Zydelig Drug: Bendamustine IV Other Name: Treanda, Treakisym, Ribomustin, Levact Drug: Rituximab IV Other Name:

Sponsors

Masaki Takeshi
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Confirmed diagnosis of CLL/SLL requiring therapy as defined by iwCLL 2018 criteria. Previously treated with a covalent BTK inhibitor. Eastern Cooperative Oncology Group (ECOG) 0-2. Absolute neutrophil count >= 0.75 x 10^9/L without granulocyte-colony-stimulating factor support, or >= 0.50 x 10^9/L in patients with documented bone marrow involvement considered to impair hematopoiesis. Granulocyte-colony-stimulating factor support is permitted in patients with documented bone marrow involvement. Hemoglobin >= 8 g/dL or >= 6 g/dL in patients with documented bone marrow involvement considered to impair hematopoiesis. Transfusion support is permitted in patients with bone marrow involvement. Platelets >= 50 x 10^9/L. If an investigator has chosen bendamustine/rituximab as the Arm B treatment, platelets must be >= 75 x 10^9/L. Patients may enroll below these thresholds if the Investigator determines the cytopenia is related to bone marrow involvement considered to impair hematopoiesis. Patients with a platelet count = 30 mL/min.

Exclusion criteria

Exclusion criteria: Known or suspected Richter's transformation at any time preceding enrollment. Known or suspected history of central nervous system (CNS) involvement by CLL/SLL. Ongoing drug-induced liver injury. Active uncontrolled auto-immune cytopenia. Significant cardiovascular disease. History of allogeneic or stem cell transplantation (SCT) or chimeric antigen receptor-modified T cells (CAR-T) therapy within the past 60 days. Active hepatitis B or hepatitis C. Known active cytomegalovirus (CMV) infection. Active uncontrolled systemic bacterial, viral, fungal or parasitic infection. Known Human Immunodeficiency Virus (HIV) infection, regardless of CD4 count. Clinically significant active malabsorption syndrome or inflammatory bowel disease Prior exposure to non-covalent (reversible) BTK inhibitor. Patients requiring therapeutic anticoagulation with warfarin or another Vitamin K antagonist. Current treatment with strong cytochrome P450 (CYP) 3A4 (CYP3A4) inhibitors or inducers. Vaccination with a live vaccine within 28 days prior to randomization. Patients with the following hypersensitivity: 1. Known hypersensitivity, including anaphylaxis, to any component or excipient of LOXO-305. For patients planned to receive idelalisib, known hypersensitivity, including anaphylaxis, to any component or excipient of idelalisib. For patients planned to receive bendamustine, known hypersensitivity, including anaphylaxis, to any component or excipient of bendamustine. 2. Prior significant hypersensitivity to rituximab.

Design outcomes

Primary

MeasureTime frame
To evaluate progression-free survival (PFS) of LOXO-305 monotherapy (Arm A) compared to investigator's choice of idelalisib plus rituximab (IdelaR) or bendamustine plus rituximab (BR) (Arm B) [ Time Frame: Up to approximately 36 months ] Assessed per iwCLL 2018

Countries

Australia, Austria, Belgium, Canada, China, Croatia, Czech Republic, France, Germany, Hungary, Ireland, Israel, Italy, Japan, Poland, Russia, Singapore, South Korea, Spain, Switzerland, Taiwan, Turkey, United Kingdom, United States

Contacts

Public ContactjRCT Inquiry Contact IQVIA Services Japan G.K.

IQVIA Services Japan G.K.

JP_LOXO-BTK-20019_20020_CRA@iqvia.com+81-3-6859-9500

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026