Biomarker analysis of the ASPEN study comparing zanubrutinib with ibrutinib for patients with Waldenström macroglobulinemia

Constantine S. Tam, Stephen Opat, Shirley D'Sa, Wojciech Jurczak, Hui Peng Lee, Gavin Cull, Roger G. Owen, Paula Marlton, Björn E. Wahlin, Ramon García-San, Helen McCarthy, Stephen Mulligan, Alessandra Tedeschi, Jorge J. Castillo, Jaroslaw Czyz, Carlos Fernandez De Larrea, David Belada, Edward Libby, Jeffrey Matous, Marina MottaTanya Siddiqi, Monica Tani, Marek Trnený, Monique C. Minnema, Christian Buske, Veronique Leblond, Steven P. Treon, Judith Trotman, Binghao Wu, Yiling Yu, Zhirong Shen, Wai Y. Chan, Jingjing Schneider, Heather Allewelt, Aileen Cohen, Meletios A. Dimopoulos

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The phase 3 ASPEN trial (NCT03053440) compared Bruton tyrosine kinase inhibitors (BTKis), zanubrutinib and ibrutinib, in patients with Waldenström macroglobulinemia (WM). Post-hoc biomarker analysis was performed using next-generation sequencing on pretreatment bone marrow samples from 98 patients treated with zanubrutinib and 92 patients treated with ibrutinib with mutated (MUT) MYD88 and 20 patients with wild-type (WT) MYD88 treated with zanubrutinib. Of 329 mutations in 52 genes, mutations in CXCR4 (25.7%), TP53 (24.8%), ARID1A (15.7%), and TERT (9.0%) were most common. TP53MUT, ARID1AMUT, and TERTMUTwere associated with higher rates of CXCR4MUT(P < .05). Patients with CXCR4MUT(frameshift or nonsense [NS] mutations) had lower very good partial response (VGPR) and complete response rates (CR; 17.0% vs 37.2%, P = .020) and longer time to response (11.1 vs 8.4 months) than patients with CXCR4WTtreated with BTKis. CXCR4NSwas associated with inferior progression-free survival (PFS; hazard ratio [HR], 3.39; P = .017) in patients treated with ibrutinib but not in those treated with zanubrutinib (HR, 0.67; P = .598), but VGPR + CR rates were similar between treatment groups (14.3% vs 15.4%). Compared with ibrutinib, patients with CXCR4NStreated with zanubrutinib had a favorable major response rate (MRR; 85.7% vs 53.8%; P = .09) and PFS (HR, 0.30; P = .093). In patients with TP53MUT, significantly lower MRRs were observed for patients treated with ibrutinib (63.6% vs 85.7%; P = .04) but not for those treated with zanubrutinib (80.8% vs 81.9%; P = .978). In TP53MUT, compared with ibrutinib, patients treated with zanubrutinib had higher VGPR and CR (34.6% vs 13.6%; P < .05), numerically improved MRR (80.8% vs 63.6%; P = .11), and longer PFS (not reached vs 44.2 months; HR, 0.66; P = .37). Collectively, patients with WM with CXCR4MUTor TP53MUThad worse prognosis compared with patients with WT alleles, and zanubrutinib led to better clinical outcomes.

Original languageEnglish
Pages (from-to)1639-1650
Number of pages12
JournalBlood advances
Volume8
Issue number7
DOIs
Publication statusPublished - 9 Apr 2024

Fingerprint

Dive into the research topics of 'Biomarker analysis of the ASPEN study comparing zanubrutinib with ibrutinib for patients with Waldenström macroglobulinemia'. Together they form a unique fingerprint.

Cite this