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Real‐world experience with belantamab mafodotin therapy for relapsed/refractory multiple myeloma: A multicentre retrospective study
Author(s) -
Shragai Tamir,
Magen Hila,
Lavi Noa,
Gatt Moshe,
Trestman Svetlana,
Zektser Miri,
Ganzel Chezi,
Jarchowsky Osnat,
Berger Tamar,
Tadmor Tamar,
Leiba Merav,
HertzogTzarfaty Katrin,
Horowitz Netanel,
Shapira Michael,
Varssano David,
Berger Yoav,
Frenkel Shahar,
Krauthammer Mark,
Avivi Irit,
Luttwak Efrat,
Cohen Yael C.
Publication year - 2023
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/bjh.18479
Subject(s) - medicine , adverse effect , refractory (planetary science) , retrospective cohort study , multiple myeloma , confidence interval , clinical trial , toxicity , surgery , astrobiology , physics
Summary Belantamab mafodotin, an immuno‐conjugate targeting B‐cell maturation antigen, showed single‐agent activity in phase 1 and 2 studies, and was recently approved for heavily pretreated relapsed/refractory multiple myeloma (RRMM) patients. Real‐world data and long‐term follow‐up are scarce. We conducted a multisite retrospective study aimed to assess safety and efficacy of belantamab mafodotin monotherapy administered via the GSK expanded access compassionate care programme. One‐hundred and six RRMM patients were treated with belantamab mafodotin between July 2019 and March 2021. The median age was 69.4 years. Patients were heavily pretreated with a median of six (range 2–11) prior therapy lines. Major adverse effects included ocular toxicity (keratopathy 68.4%, grade ≥3: 40.5%; blurred vision 36.8%, grade ≥3: 6.3%), thrombocytopenia (27.4%, grade ≥3: 17.9%) and infections (11.3%, grade ≥3: 7.5%). Median follow‐up time was 11.9 [95% confidence interval (CI) 10.0–13.8] months. Overall response rate was 45.5%. Median progression‐free survival was 4.7 (95% CI 3.5–5.9) months in the entire cohort and 8.8 (95% CI 6.6–10.9) months among responders. Median overall survival was 14.5 (95% CI 9.5–19.6) months, and not reached for responders. To conclude, in a real‐world setting, belantamab mafodotin monotherapy showed efficacy comparable with the prospective clinical trials, with a tolerable toxicity profile.