Efficacy and safety of bortezomib maintenance in patients with newly diagnosed multiple myeloma: a meta-analysis

Chun-Yan Sun, Jun-Ying Li, Zhang-Bo Chu, Lu Zhang, Lei Chen, Yu Hu, Chun-Yan Sun, Jun-Ying Li, Zhang-Bo Chu, Lu Zhang, Lei Chen, Yu Hu

Abstract

Multiple myeloma (MM) is a B-cell neoplasm with a high incidence of relapse. Bortezomib has been extensively studied for the maintenance treatment of MM. Here, we carried out a meta-analysis to determine the efficacy and safety of maintenance therapy with bortezomib. We searched for clinical trials in PubMed (Medline), Embase (OVID), and the Cochrane Library. Two randomized controlled trials (RCTs) enrolling a total of 1338 patients were included. Bortezomib maintenance statistically significantly improved both progression-free survival (PFS) (hazard ratio (HR) 0.67, 95% confidence interval (CI) = 0.51 to 0.87, P=0.003) and overall survival (OS) (HR = 0.75 therapy, 95% CI = 0.63 to 0.89, P=0.001) more than did non-bortezomib maintenance therapy. Our analysis revealed higher incidence of neutropenia (risks ratios (RR) = 1.39; 95% CI = 1.08 to 1.79), peripheral neuropathy (PN) (RR = 2.23; 95% CI = 1.38 to 3.61, P=0.001), and cardiologic events (RR = 1.91; 95% CI = 1.12 to 3.28, P=0.02) in patients with bortezomib maintenance therapy. Our meta-analysis demonstrates OS and PFS benefits of bortezomib maintenance therapy in patients with newly diagnosed MM. However, the therapy is associated with increased risk of adverse events. Additionally, more RCTs are needed for better understanding and determination of optimal bortezomib maintenance therapy in MM.

Keywords: bortezomib; maintenance therapy; meta-analysis; multiple myeloma.

Conflict of interest statement

The authors declare that there are no competing interests associated with the manuscript.

© 2017 The Author(s).

Figures

Figure 1. Flow diagram of study selection.
Figure 1. Flow diagram of study selection.
Figure 2. Pooled HRs of PFS comparing…
Figure 2. Pooled HRs of PFS comparing bortezomib maintenance therapy arm with non-borzomib maintenance therapy arm.
Figure 3. Pooled HRs of OS comparing…
Figure 3. Pooled HRs of OS comparing bortezomib maintenance therapy arm with non-borzomib maintenance therapy arm.
Figure 4. Pooled RR of grade 3–4…
Figure 4. Pooled RR of grade 3–4 adverse events comparing bortezomib maintenance therapy arm with non-bortezomib maintenance therapy arm: Different events are separately shown from subparts (a) to (h)
(a) Neutropenia, (b) thrombocytopenia, (c) anemia, (d) infection, (e) deep vein thrombosis, (f) PN, (g) cardiologic events, and (h) GI symptoms.

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Source: PubMed

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