Romiplostim N01 for Platelet Recovery After Haploidentical HSCT

This is a prospective, randomized, controlled clinical study designed to evaluate the efficacy and safety of Romiplostim N01 in promoting platelet engraftment after haploidentical allogeneic hematopoietic stem cell transplantation (haplo-HSCT) in patients with hematologic malignancies. A total of 130 patients who undergo haplo-HSCT for acute myeloid leukemia (AML), myelodysplastic syndromes (MDS), or other hematologic malignancies will be enrolled and randomized 1:1 into a treatment group and a control group. The treatment group will receive Romiplostim N01 subcutaneously once weekly at a starting dose of 5 µg/kg, with dose adjustments based on platelet counts (maximum 10 µg/kg), for up to 4 weeks or until platelet counts reach ≥100 × 10⁹/L. The control group will not receive rh-TPO or any thrombopoietin receptor agonist (TPO-RA) therapy. Supportive care including transfusions and growth factors (G-CSF, ESA) is allowed in both groups. The primary endpoint is the cumulative platelet engraftment rate by day +21 post-transplant, defined as sustained platelet counts \> 20 × 10⁹/L for at least 7 consecutive days without transfusion. Secondary endpoints include median time to platelet engraftment, median time to achieve platelet counts ≥ 50 × 10⁹/L and ≥ 100 × 10⁹/L, total platelet transfusion volume, erythroid and neutrophil responses within 4 weeks, and overall hematopoietic recovery. Safety endpoints include the incidence of adverse events, thromboembolic events, and treatment…

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