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Study of BTK Inhibitor LOXO-305 Versus Approved BTK Inhibitor Drugs in Patients With Mantle Cell Lymphoma (MCL)

A Phase 3 Open-Label, Randomized Study of LOXO-305 Versus Investigator Choice of BTK Inhibitor in Patients With Previously Treated BTK Inhibitor Naive Mantle Cell Lymphoma (BRUIN MCL-321)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2021210026
Enrollment
500
Registered
2021-08-13
Start date
2021-11-04
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

Lymphoma, Mantle-Cell

Interventions

Drug: Pirtobrutinib Oral Other Names: LOXO-305 LY3527727 Drug: Ibrutinib Oral Other Name: Imbruvica Drug: Acalabrutinib Oral Other Name: Calquence Drug: Zanubrutinib Oral Other Name: Brukinsa [Study

Sponsors

Masaki Takeshi
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Confirmed MCL diagnosis - Previously treated with at least one prior line of systemic therapy for MCL - Measurable disease per Lugano criteria - Eastern Cooperative Oncology Group (ECOG) 0-2 - Absolute neutrophil count >= 0.75 x 109/L): independent of growth factor support within 7 days of Screening assessment - Hemoglobin >= 8 g/dL: independent of transfusions, and of growth factor support within 7 days of Screening assessment - Platelets >= 50 x 109/L: independent of transfusions, and of growth factor support within 7 days of Screening assessment - AST and ALT = 30 mL/min according to Cockcroft/Gault Formula

Exclusion criteria

Exclusion criteria: - Prior treatment with an approved or investigational BTK inhibitor - History of bleeding diathesis - History of stroke or intracranial hemorrhage within 6 months of randomization - History of allogeneic or autologous stem cell transplant (SCT) or chimeric antigen receptor modified T-cell (CAR-T) therapy within 60 days of randomization - Clinically significant cardiovascular disease - Prolonged QT interval corrected using Fridericia's formula (QTcF) > 470 ms on 2/3 consecutive ECGs, and mean QTcF>470 ms on all 3 ECGs - Known HIV infection or active HBV, HCV, or CMV infections - Clinically significant active malabsorption syndrome or other condition likely to affect gastrointestinal (GI) absorption - Current treatment with strong cytochrome P450 3A4 (CYP3A4) inhibitors or inducers and/or strong P-gp inhibitors. - Patients requiring therapeutic anticoagulation with warfarin or another Vitamin K antagonist. - Vaccination with live vaccine within 28 days prior to randomization

Design outcomes

Primary

MeasureTime frame
To compare progression-free survival (PFS) of pirtobrutinib as monotherapy (Arm A) to investigator choice of covalent BTK inhibitor monotherapy (Arm B) in patients with previously treated mantle cell lymphoma (MCL) [ Time Frame: Up to approximately 24 months ] Assessed per Lugano criteria

Countries

Australia, Austria, Belgium, Brazil, Canada, China, Czechia, Denmark, France, Germany, Hungary, Ireland, Israel, Italy, Japan, Netherlands, New Zealand, Poland, Portugal, Republic of Korea, Russian Federation, Spain, Switzerland, Taiwan, 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