Lilly's Jaypirca (pirtobrutinib), the first and only approved non-covalent (reversible) BTK inhibitor, met its primary endpoint in a head-to-head Phase 3 trial versus Imbruvica (ibrutinib) in CLL/SLL
BRUIN CLL-314 is the first ever head-to-head trial versus ibrutinib in CLL to include treatment-naïve patients. This important subpopulation (n=225) had the longest follow-up and a particularly pronounced PFS effect size in favor of pirtobrutinib.
The overall safety profile of pirtobrutinib in BRUIN CLL-314 was similar to previously reported trials. Detailed results will be presented at a medical congress later in 2025.
'We launched the pirtobrutinib randomized development program with an ambitious suite of clinical trials, including head-to-head studies against modern standards of care and examinations of patient populations that reflect real world use, such as BTK inhibitor-pretreated patients,' said Jacob Van Naarden, executive vice president and president of Lilly Oncology. 'These data mark the second positive Phase 3 study in the program, as we continue to build evidence supporting the potential role of pirtobrutinib in treating people with CLL/SLL and hopefully enabling future regulatory approvals that allow physicians to use the medicine in various disease settings, whether treatment-naïve or BTK inhibitor-pretreated.'
These data build on the previously reported positive results from the BRUIN Phase 1/2 trial and the Phase 3 BRUIN CLL-321 trial, the first randomized, controlled study ever conducted in an exclusively post-covalent BTK inhibitor population. The BRUIN CLL-313 Phase 3 study of pirtobrutinib versus chemoimmunotherapy in treatment naïve CLL/SLL is expected to read out later in 2025 and combined with the results of BRUIN CLL-314, will form the basis of regulatory submissions globally. For more information on the BRUIN Phase 3 clinical trial program, please visit clinicaltrials.gov.
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