NCT04515238

Sequential Regimen of Bendamustine Followed by Obinutuzumab (GA101), Zanubrutinib (BGB-3111) and Venetoclax (ABT-199) in Patients With Relapsed/Refractory CLL

A Prospective, Open-label, Multicenter Phase-II Trial to Evaluate the Efficacy and Safety of a Sequential Regimen of Bendamustine Followed by Obinutuzumab (GA101), Zanubrutinib (BGB-3111) and Venetoclax (ABT-199) in Patients With Relapsed/Refractory CLL (CLL2-BZAG Protocol)

• Status: Active Not Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 42 (actual)
• Sponsor: German CLL Study Group · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

CLL2-BZAG is a prospective, open-label, multicenter phase-II trial to evaluate the efficacy and safety of a sequential regimen of bendamustine followed by obinutuzumab (GA101), zanubrutinib (BGB-3111) and venetoclax (ABT-199) in patients with relapsed/refractory CLL.

Detailed description

In the CLL2-BZAG trial will be included a total of 40 patients with relapsed or refractory CLL in need of treatment. This trial will evaluate a debulking with two cycles bendamustine (only for patients with a high tumor load), followed by an induction and maintenance treatment with obinutuzumab, zanubrutinib and venetoclax in patients with relapsed/refractory CLL. Thus, this trial combines one established (chemotherapy) and three novel, synergistic (antibody, Bruton's tyrosine kinase(BTK)-inhibitor and Bcl-2 antagonist) principles of action in order to achieve deep and long lasting remissions with a short duration of treatment. Additionally, this trial has an extensive accompanying scientific program aiming at a better understanding of the kinetics of response and clonal evolution of CLL.

Conditions

• Chronic Lymphoid Leukemia

Interventions

Type	Name	Description
DRUG	Bendamustine	Debulking: Cycles 1-2: d1+2 - 70mg/m² i.v.
BIOLOGICAL	Obinutuzumab	Induction: Cycle 1: d1 - 100 mg, d1 (or d2) - 900 mg, d8 + d15 - 1000 mg i.v.; Cycle 2 - 6: 1000 mg, d1 i.v. Maintenance: Cycle 1 - 8: 1000 mg, d1 i.v.
BIOLOGICAL	Zanubrutinib	Induction: Cycle 1: --; Cycles 2 - 6: d1-28: 2 x 160mg p.o. Maintenance: Cycle 1 - 8: d1-84: 2 x 160mg p.o
BIOLOGICAL	Venetoclax	Induction: Cycles 1 + 2: --; Cycle 3: d1-7: 20mg, d8-14: 50mg, d15-21: 100mg, d22-28: 200mg p.o.; Cycle 4 - 6: d1-28: 400 mg p.o. Maintenance: Cycle 1 - 8: d1-84: 400 mg p.o.

Timeline

• Start date: 2020-10-01
• Primary completion: 2026-12-01
• Completion: 2026-12-01
• First posted: 2020-08-17
• Last updated: 2025-06-10

Locations

11 sites across 1 country: Germany