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BRUKINSA WAS STUDIED IN PATIENTS WHO DISCONTINUED ACALABRUTINIB OR IBRUTINIB DUE TO ADVERSE EVENTS (AEs)1-3
Study 215 was a Phase 2, single-arm, open-label exploratory study of BRUKINSA in patients with CLL/SLL who were intolerant to acalabrutinib or ibrutinib.*
Primary endpoint: Recurrence and change in severity of acalabrutinib- and/or ibrutinib-intolerant events (investigator assessed)
- AEs were collected retrospectively and evaluated and graded according to the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. In patients with CLL, treatment-emergent cytopenias were graded per iWCLL criteria‡
Select secondary endpoints: DCR, ORR
All data are exploratory and descriptive in nature.
*This analysis included patients with CLL/SLL, MCL, MZL, or WM (N=84). Of the 27 patients who were intolerant to acalabrutinib, 14 were intolerant to acalabrutinib only, and 13 were intolerant to both ibrutinib and acalabrutinib.3
†Study is ongoing.3
‡AEs were considered to have recurred if the same Medical Dictionary for Regulatory Activities preferred term, independent of grade, occurred while on BRUKINSA.
~70% OF INTOLERANCE EVENTS THAT OCCURRED WITH ACALABRUTINIB OR IBRUTINIB DID NOT OCCUR WITH BRUKINSA3,4BRUKINSA incidence and severity of AEs (primary endpoint)3BRUKINSA tolerability in acalabrutinib-intolerant patients (n=27)3
BRUKINSA tolerability in ibrutinib-intolerant patients (n=57)4
There are no head-to-head trials between BRUKINSA and acalabrutinib.
No adverse events occurred at a higher grade with BRUKINSA3,4
- <10% of patients treated with BRUKINSA discontinued treatment due to AEs4
Response rates maintained or improved with BRUKINSA3,496%of patients treated with BRUKINSA maintained or improved their response after acalabrutinib or ibrutinib intolerance (secondary endpoint)3
All data are exploratory and descriptive in nature.
Assessed by investigator; median follow-up: 25.2 months for acalabrutinib and ibrutinib.4
BID=twice daily; BTKis=Bruton’s tyrosine kinase inhibitors; CLL=chronic lymphocytic leukemia; DCR=disease control rate; iWCLL=International Workshop on Chronic Lymphocytic Leukemia; MCL=mantle cell lymphoma; MZL=marginal zone lymphoma; ORR=overall response rate; QD=once daily; SLL=small lymphocytic lymphoma; WM=Waldenström’s macroglobulinemia.
References: 1. Shadman M, Burke JM, Zafar SF, et al. A phase 2 study of zanubrutinib in previously treated B-cell malignancies intolerant to ibrutinib and/or acalabrutinib: preliminary results for patients with CLL/SLL. Poster presented at: International Conference on Malignant Lymphoma (ICML); June 13-17, 2023. Poster 345. 2. Shadman M, Flinn IW, Levy MY, et al. Zanubrutinib in patients with previously treated B-cell malignancies intolerant of previous Bruton tyrosine kinase inhibitors in the USA: a phase 2, open-label, single-arm study. Lancet Haematol. 2023;10(1):e35-e45. 3. Shadman M, Flinn IW, Kingsley EC, et al. Zanubrutinib in acalabrutinib-intolerant patients with B-cell malignancies. Poster presented at: American Society of Hematology (ASH) Annual Meeting and Exposition; December 9-12, 2023. Abstract 3279. 4. Shadman M, Levy MY, Burke JM, et al. Updated safety and efficacy results of zanubrutinib in patients with B-cell malignancies who are intolerant of ibrutinib and/or acalabrutinib. Poster presented at: European Hematology Association (EHA) 2023 Hybrid Congress; June 8-15, 2023. Abstract P633.