Study to Assess Safety and Tumor Lysis Risk of Venetoclax Combined With Obinutuzumab or Acalabrutinib in Adults With Untreated Chronic Lymphocytic Leukemia

What this Trial Is About

Chronic lymphocytic leukemia CLL is the most common type of leukemia affecting blood cells. Researchers are evaluating the safety of combining oral venetoclax with either intravenously infused obinutuzumab or oral acalabrutinib for treating previously untreated CLL. The study focuses on assessing adverse events and changes in disease activity in adult participants. Participants are randomly assigned to one of four treatment groups. Arm A receives oral venetoclax with IV obinutuzumab, including a 5-week venetoclax ramp-up period. Arms B, C, and D receive oral venetoclax combined with oral acalabrutinib, with different venetoclax ramp-up schedules varying between 5 weeks and modified ramp-up periods. The total study duration is approximately 28 months. Participants will attend regular hospital or clinic visits for medical assessments, blood tests, side effect checks, and questionnaires to monitor treatment effects. Researchers will measure the percentage of participants experiencing laboratory tumor lysis syndrome and hyperkalemia during treatment. Safety monitoring and evaluations of tumor burden changes will continue for up to 28 months throughout the study.

A Study to Evaluate the Risk of Tumor Lysis Syndrome (TLS) in Adult Participants Receiving Oral Venetoclax in Combination With Intravenously Infused Obinutuzumab or Oral Acalabrutinib for Previously Untreated Chronic Lymphocytic Leukemia (CLL)