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• W2909163548 abstract "Abstract β-thalassemia is a hereditary disorder with limited approved treatment options; patients experience anemia and its complications, including iron overload. The study aim was to determine whether luspatercept could improve anemia and disease complications in patients with β-thalassemia. This open-label, nonrandomized, uncontrolled study consisted of a 24-week dose-finding and expansion stage (initial stage) and a 5-year extension stage, currently ongoing. Sixty-four patients were enrolled; 33 were non–transfusion dependent (mean hemoglobin, &lt;10.0 g/dL; &lt;4 red blood cell [RBC] units transfused per 8 weeks), and 31 were transfusion dependent (≥4 RBC units per 8 weeks). Patients received 0.2 to 1.25 mg/kg luspatercept subcutaneously every 21 days for ≥5 cycles (dose-finding stage) and 0.8 to 1.25 mg/kg (expansion cohort and 5-year extension). The primary end point was erythroid response, defined as hemoglobin increase of ≥1.5 g/dL from baseline for ≥14 consecutive days (without RBC transfusions) for non–transfusion-dependent patients or RBC transfusion burden reduction ≥20% over a 12-week period vs the 12 weeks before treatment for transfusion-dependent patients. Eighteen non–transfusion-dependent patients (58%) receiving higher dose levels of luspatercept (0.6-1.25 mg/kg) achieved mean hemoglobin increase ≥1.5 g/dL over ≥14 days vs baseline. Twenty-six (81%) transfusion-dependent patients achieved ≥20% reduction in RBC transfusion burden. The most common grade 1 to 2 adverse events were bone pain, headache, and myalgia. As of the cutoff, 33 patients remain on study. In this study, a high percentage of β-thalassemia patients receiving luspatercept had hemoglobin or transfusion burden improvements. These findings support a randomized clinical trial to assess efficacy and safety. This study was registered at www.clinicaltrials.gov as #NCT01749540 and #NCT02268409." @default.
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• W2909163548 date "2019-03-21" @default.
• W2909163548 modified "2023-10-12" @default.
• W2909163548 title "Luspatercept improves hemoglobin levels and blood transfusion requirements in a study of patients with β-thalassemia" @default.
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• W2909163548 doi "https://doi.org/10.1182/blood-2018-10-879247" @default.
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