RT Journal Article T1 A phase 2 study of ibrutinib in combination with bortezomib and dexamethasone in patients with relapsed/refractory multiple myeloma. A1 Hajek, Roman A1 Pour, Ludek A1 Ozcan, Muhit A1 Martin Sánchez, Jesus A1 García Sanz, Ramon A1 Anagnostopoulos, Achilles A1 Oriol, Albert A1 Cascavilla, Nicola A1 Terjung, Andreas A1 Lee, Yihua A1 Briso, Eva M A1 Dobkowska, Edyta A1 Hauns, Bernhard A1 Špička, Ivan K1 bortezomib K1 dexamethasone K1 ibrutinib K1 multiple myeloma AB We evaluated ibrutinib, a once-daily inhibitor of Bruton's tyrosine kinase, combined with bortezomib and dexamethasone in patients with relapsed or relapsed/refractory multiple myeloma who had received 1-3 prior therapies. This was a phase 2, single-arm, open-label, multicentre study (NCT02902965). The primary endpoint was progression-free survival (PFS). Seventy-six patients were enrolled; 74 received ≥1 dose of study treatment. After median follow-up of 19.6 months, median PFS was 8.5 months (95% CI: 6.2-10.8); median overall survival was not reached. Overall response rate was 57% (95% CI: 45-68), and median duration of response was 9.5 months (95% CI: 6.9-10.6). Grade 3/4 AEs occurred in 73% of patients and fatal AEs occurred in 15% of patients. Incidence of major haemorrhage was 5%; one patient died from cerebral haemorrhage. After an observed increased incidence of serious (42%) and fatal (11%) infections, enrolment was suspended to implement risk-minimisation measures. The safety profile was otherwise consistent with known safety profiles of the individual drugs. Ibrutinib combined with bortezomib and dexamethasone elicited clinical responses. However, efficacy assessments conducted at potential restart of enrolment indicated that the targeted PFS could not be reached with additional patient enrolment, and the study was terminated. YR 2020 FD 2020-03-07 LK http://hdl.handle.net/10668/14899 UL http://hdl.handle.net/10668/14899 LA en DS RISalud RD Apr 10, 2025