A Phase 4 Study to Evaluate Safety and Effectiveness of Luspatercept (ACE-536) for the Treatment of Anemia Due to IPSS-R Very Low, Low, or Intermediate Risk Myelodysplastic Syndromes (MDS) With Ring Sideroblasts Who Require Red Blood Cell Transfusions in Participants Who Have Had Unsatisfactory Response to or Are Ineligible to Erythropoietin Based Therapy and in Participants With Transfusion Dependent Anemia Due to Beta-Thalassemia
The purpose of this study is to evaluate the safety and effectiveness of luspatercept in participants who require regular blood cell transfusions due to b-thalassemia and myelodysplastic syndromes in India
⁃ β-Thalassemia Cohort
• Documented diagnosis of β-thalassemia or hemoglobin (Hb E/β-thalassemia). (β-thalassemia with mutation and/or multiplication of alpha \[α\] globin is allowed).
• Regularly transfused, defined as 6 RBC units to 20 RBC units in the 24 weeks prior to enrollment and no transfusion-free period for \> 35 days during that period.
⁃ MDS-RS Cohort
⁃ \- Participant has documented diagnosis of MDS according to World Health Organization (WHO) (2016)/French-American-British FAB classification that meets revised International Prognostic Scoring System (IPSS-R) classification of very low, low, or intermediate risk disease and the following criteria: i) RS ≥ 15% of erythroid precursors in bone marrow. If the SF3B1 mutation is present, RS ≥ 5% will be included.
⁃ ii) Less than 5% blasts in bone marrow and \< 1% peripheral blood blasts. iii) Peripheral blood white blood cell (WBC) count \< 13,000/ microliters (μL).
• If the participant was previously treated with erythropoiesis-stimulating agents (ESAs) or granulocyte colony-stimulating factor (G-CSF)/granulocyte-macrophage colony-stimulating factor (GM-CSF), both agents must have been discontinued ≥ 4 weeks prior to the date of enrollment.