for people ages 18 years and up (full criteria)
study started
completion around



This is a Phase 1/2 dose-escalation study of BTCT4465A (Mosunetuzumab) administered as a single agent and in combination with atezolizumab in participants with relapsed or refractory B-cell NHL and CLL. The study will consist of a dose-escalation stage and an expansion stage where participants will be enrolled into indication-specific cohorts.

Official Title

An Open-Label, Multicenter, Phase I/II Trial Evaluating the Safety, Efficacy, and Pharmacokinetics of Escalating Doses of Mosunetuzumab (BTCT4465A) as a Single Agent and Combined With Atezolizumab in Patients With Relapsed or Refractory B-Cell Non-Hodgkin's Lymphoma and Chronic Lymphocytic Leukemia


Lymphocytic Leukemia, Chronic, Lymphoma, Non Hodgkin, Lymphoma, Leukemia, Non-Hodgkin Lymphoma, Lymphoid Leukemia, Leukemia, Lymphocytic, Chronic, B-Cell, Atezolizumab, BTCT4465A (Mosunetuzumab) IV, BTCT4465A (Mosunetuzumab) SC


You can join if…

Open to people ages 18 years and up

  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
  • B-cell hematologic malignancies expected to express the cluster of differentiation 20 (CD20) antigen who have relapsed after or failed to respond to at least one prior treatment regimen and for whom there is no available therapy expected to improve survival
  • Adequate hepatic, hematologic, and renal function

You CAN'T join if...

  • Pregnant or lactating women
  • Monoclonal antibody, radioimmunoconjugate, antibody-drug conjugate, chemotherapy, or other investigational anti-cancer agent within 4 weeks prior to study drug
  • Treatment with radiotherapy within 2 weeks prior to the first BTCT4465A (Mosunetuzumab) administration
  • Systemic immunosuppressive medication within 2 weeks prior to study drug
  • Autologous stem cell transplantation (SCT) within 100 days prior to study drug, or any prior allogeneic SCT or solid organ transplantation
  • Autoimmune disease with the exception of controlled/treated hypothyroidism, disease-related immune thrombocytopenic purpura, or hemolytic anemia
  • History of central nervous system (CNS) lymphoma or other CNS disease
  • Significant cardiovascular or pulmonary disease
  • Hepatitis B or C or human immunodeficiency virus (HIV)
  • Receipt of a live attenuated vaccine within 4 weeks prior to study drug
  • Prior treatment with chimeric antigen receptor T-cell (CAR-T) therapy within 30 days before first BTCT4465A (Mosunetuzumab) administration


  • University of California San Diego Moores Cancer Center
    La Jolla California 92037 United States
  • City of Hope National Medical Center
    Duarte California 91010 United States


in progress, not accepting new patients
Start Date
Completion Date
Genentech, Inc.
Phase 1/2 research study
Study Type
Expecting 836 study participants
Last Updated