A Study of the Bruton's Tyrosine Kinase Inhibitor Ibrutinib Given in Combination With Bendamustine and Rituximab in Patients With Newly Diagnosed Mantle Cell Lymphoma

Primary Outcome Measures:

• Progression-free survival [ Time Frame: Up to the end-of-study visit until 265 progression-free survival events have been observed (up to 7 years after the last patient is randomized) ]
  

Secondary Outcome Measures:

• Overall survival [ Time Frame: Up to the end-of-study visit until 60% of all enrolled patients have died (up to 7 years after the last patient is randomized) ]
  
• Overall response rate [ Time Frame: Up to the end-of-study visit up to 7 years after the last patient is randomized ]
  
• Number of participants with change in Lym subscale scores of the Functional Assessment of Cancer Therapy-Lymphoma (FACT Lym) [ Time Frame: Screening, Day 1 of the first 6 cycles, then every 12 weeks in the first 12 months, thereafter every 16 weeks up to 7 years after the last patient is randomized ]
  
• Minimal residual disease negative rate [ Time Frame: For participants with complete response, every 12 weeks in the first 12 months, thereafter every 16 weeks and at disease progression or up to the end-of-study visit (up to 7 years after the last patient is randomized) ]
  
• Duration of response [ Time Frame: Up to the end-of-study visit up to 7 years after the last patient is randomized ]
  
• Time-to-next treatment [ Time Frame: Up to the end-of-study visit up to 7 years after the last patient is randomized ]
  
• Number of participants affected by an adverse event [ Time Frame: Up to 30 days after the last dose of any study treatment ]
  
• Oral plasma clearance of ibrutinib as derived from population pharmacokinetics [ Time Frame: Predose on Day 2 Cycles 1-3, postdose on Day 2 Cycles 1 and 2 at 1, 2, and 4 hours after administration of ibrutinib study dose ]
  
• Oral volume of distribution at steady state of ibrutinib as derived from population pharmacokinetics [ Time Frame: Predose on Day 2 Cycles 1-3, postdose on Day 2 Cycles 1 and 2 at 1, 2, and 4 hours after administration of ibrutinib study dose ]
  
• Area under the concentration curve of ibrutinib as derived from population pharmacokinetics [ Time Frame: Predose on Day 2 Cycles 1-3, postdose on Day 2 Cycles 1 and 2 at 1, 2, and 4 hours after administration of ibrutinib study dose ]
  
• Minimum observed plasma concentration of ibrutinib as derived from population pharmacokinetics [ Time Frame: Predose on Day 2 Cycles 1-3, postdose on Day 2 Cycles 1 and 2 at 1, 2, and 4 hours after administration of ibrutinib study dose ]
  
• Maximum observed plasma concentration of ibrutinib as derived from population pharmacokinetics [ Time Frame: Predose on Day 2 Cycles 1-3, postdose on Day 2 Cycles 1 and 2 at 1, 2, and 4 hours after administration of ibrutinib study dose ]
  

This is a randomized (individuals assigned to study treatment by chance), double blind (neither physician nor participant knows the treatment that the participant receives), placebo (an inactive substance that is compared with a drug to test whether the drug has a real effect in a clinical trial)-controlled study to compare the efficacy and safety of ibrutinib given in combination with bendamustine and rituximab (BR) with BR alone in participants newly diagnosed with mantle cell lymphoma (MCL) who are 65 years of age or older. Approximately 520 participants will be randomly assigned in a 1:1 ratio and stratified by simplified Mantle Cell Lymphoma International Prognostic Index (MIPI) score (low risk [0-3] versus intermediate risk [4-5] versus high risk [6-11]). The treatment phase will extend from randomization until discontinuation of all study treatment or the clinical cutoff for the end of study. A cycle is defined as 28 days. All participants will receive open-label (identity of assigned study drug will be known) BR background therapy for a maximum of 6 cycles; participants with a complete response or partial response will continue to receive open-label background therapy with rituximab maintenance every second cycle for a maximum of 12 additional doses. In addition to the background therapy, all participants will receive blinded study drug (ibrutinib or placebo). Participants randomized to treatment Arm A will receive placebo capsules and participants randomized to treatment Arm B will receive ibrutinib capsules. Study drug will be administered daily and continuously until disease progression, unacceptable toxicity, or study end. Participants with stable disease after initial chemoimmunotherapy (BR+ibrutinib/placebo) should continue treatment with ibrutinib/placebo until disease progression, unacceptable toxicity, or study end. Participants with progressive disease must discontinue all study treatment. For participants who discontinue background therapy and do not have progressive disease, treatment with study drug will continue until disease progression or unacceptable toxicity or the clinical cutoff for the final analysis of progression-free survival (PFS). Participants receiving BR, rituximab, or ibrutinib at the clinical cutoff for the final analysis of PFS will continue open-label treatment until disease progression or unacceptable toxicity. Placebo will be stopped when the study is unblinded for the clinical cutoff for the final analysis of PFS. The posttreatment follow-up phase will begin once a participant discontinues bendamustine and rituximab and study drug. Participants who discontinue for reasons other than disease progression must continue to have disease evaluations as outlined in the protocol. Participants who discontinue due to disease progression will be followed for survival and subsequent anti-MCL therapy. The posttreatment follow-up phase will continue until death, lost to follow up, consent withdrawal, or study end, whichever occurs first. Four clinical cutoffs are planned. The first 3 clinical cutoffs will occur when approximately 134, 180, and 265 PFS events have been observed, respectively. The interim analyses and the final analysis of PFS will take place at these 3 clinical cutoffs, respectively; participant treatment assignment will be unblinded at the clinical cutoff for the final analysis of PFS. The last cutoff will occur at the end of study, when 60% of the randomized participants have died or the Sponsor terminates the study, whichever comes first. Efficacy assessments will be conducted in accordance with the Revised Response Criteria for Malignant Lymphoma. Safety will be monitored throughout the study and summarized. Blood samples will be drawn for assessment of pharmacokinetic parameters. Blood and bone marrow will be collected for assessment of minimal residual disease and biomarker studies.