Lilly's Jaypirca (pirtobrutinib), the first and only approved non-covalent (reversible) BTK inhibitor, significantly improved progression-free survival in patients with treatment-naïve CLL/SLL

Core Insights - The Phase 3 BRUIN CLL-313 study demonstrated that pirtobrutinib significantly improves progression-free survival (PFS) compared to bendamustine plus rituximab in treatment-naïve patients with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) without 17p deletions, marking a notable effect size for a single-agent BTK inhibitor in front-line CLL studies [1][2][4] Study Details - BRUIN CLL-313 is a global, randomized, open-label Phase 3 study involving 282 patients, comparing pirtobrutinib (200 mg orally once daily) to chemoimmunotherapy (bendamustine plus rituximab) [5] - The primary endpoint of the study was progression-free survival (PFS), assessed by an independent review committee (IRC), with secondary endpoints including overall response rate (ORR), duration of response (DoR), overall survival (OS), and safety [5] Future Plans - Results from BRUIN CLL-313 and BRUIN CLL-314 will support label expansions for earlier lines of therapy, with global regulatory submissions expected to begin later this year [1][3][4] Safety Profile - The overall safety profile of pirtobrutinib in the BRUIN CLL-313 study was consistent with previous trials, with serious adverse reactions occurring in a notable percentage of patients [2][10][11]