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Clinical Trial Summary

To learn if the combination of pirtobrutinib (also called LOXO-305), venetoclax, and obinutuzumab is safe and effective when given to patients with chronic lymphocytic leukemia (CLL) or Richter transformation (RT) who have not previously received treatment.


Clinical Trial Description

Primary Objective: 1. Estimate the therapeutic activity (undetectable measurable residual disease [U-MRD] rate) of combined pirtobrutinib, venetoclax, and obinutuzumab in patients with previously untreated CLL/SLL (cohort 1) by undetectable measurable residual disease (U-MRD) rate and Richter transformation (cohort 2) by overall response rate (ORR) (defined as CMR//PMR). Secondary Objectives: 1. To estimate the therapeutic activity of combination therapy by determining: 1. Combined response rate (defined as CR/CRi/PR) as assessed by the investigator for cohort 1 (CLL/SLL) 2. Progression free survival (PFS) and overall survival (OS). 3. U-MRD response with next generation sequencing assay for cohort 2 2. To determine the safety and tolerability of this combination therapy Exploratory Objective: 1. To study immunological and molecular changes in the peripheral blood and bone marrow in response to pirtobrutinib, venetoclax, and obinutuzumab. 2. To evaluate the kinetics of MRD response over time ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05536349
Study type Interventional
Source M.D. Anderson Cancer Center
Contact Nitin Jain, MD
Phone (713) 745-6080
Email njain@mdanderson.org
Status Recruiting
Phase Phase 2
Start date December 20, 2022
Completion date April 25, 2025

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