Longer term outcomes with single-agent belantamab mafodotin in patients with relapsed or refractory multiple myeloma: 13-month follow-up from the pivotal DREAMM-2 study
Author
Lonial, SagarLee, Hans C
Badros, Ashraf
Trudel, Suzanne
Nooka, Ajay K
Chari, Ajai
Abdallah, Al-Ola
Callander, Natalie
Sborov, Douglas
Suvannasankha, Attaya
Weisel, Katja
Voorhees, Peter M
Womersley, Lynsey
Baron, January
Piontek, Trisha
Lewis, Eric
Opalinska, Joanna
Gupta, Ira
Cohen, Adam D
Date
2021-07-27Journal
CancersPublisher
Wiley-BlackwellType
Article
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BACKGROUND: On the basis of the DREAMM-2 study (ClinicalTrials.gov identifier NCT03525678), single-agent belantamab mafodotin (belamaf) was approved for patients with relapsed or refractory multiple myeloma (RRMM) who received ≥4 prior therapies, including anti-CD38 therapy. The authors investigated longer term efficacy and safety outcomes in DREAMM-2 after 13 months of follow-up among patients who received belamaf 2.5 mg/kg. METHODS: DREAMM-2 is an ongoing, phase 2, open-label, 2-arm study investigating belamaf (2.5 or 3.4 mg/kg) in patients with RRMM who had disease progression after ≥3 lines of therapy and were refractory to immunomodulatory drugs and proteasome inhibitors and refractory and/or intolerant to an anti-CD38 therapy. The primary outcome was the proportion of patients that achieved an overall response, assessed by an independent review committee. RESULTS: As of January 31, 2020, 10% of patients still received belamaf 2.5 mg/kg. Thirty-one of 97 patients (32%; 97.5% confidence interval [CI], 21.7%-43.6%) achieved an overall response, and 18 responders achieved a very good partial response or better. Median estimated duration of response, overall survival, and progression-free survival were 11.0 months (95% CI, 4.2 months to not reached), 13.7 months (95% CI, 9.9 months to not reached), and 2.8 months (95% CI, 1.6-3.6 months), respectively. Response and survival outcomes in patients who had high-risk cytogenetics or renal impairment were consistent with outcomes in the overall population. Outcomes were poorer in patients with extramedullary disease. In patients who had a clinical response and prolonged dose delays (>63 days; mainly because of corneal events), 88% maintained or deepened responses during their first prolonged dose delay. Overall, there were no new safety signals during this follow-up. CONCLUSIONS: Extended follow-up confirms sustained clinical activity without new safety signals with belamaf in this heavily pretreated patient population with RRMM. © 2021 The Authors.Rights/Terms
© 2021 The Authors. Cancer published by Wiley Periodicals LLC on behalf of American Cancer Society.Keyword
B-cell maturation antigenantibody-drug conjugate
clinical activity
monoclonal antibody
multiple myeloma
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http://hdl.handle.net/10713/16324ae974a485f413a2113503eed53cd6c53
10.1002/cncr.33809
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