Abstract
Allogeneic hematopoietic stem cell transplantation (HSCT) is curative for a variety of nonmalignant disorders including osteopetrosis, bone marrow failures, and immune deficiencies. Haploidentical HSCT is a readily available option in the absence of a matched donor, but engraftment failure and other post-transplant complications are a concern. Post-transplant cyclophosphamide (PT-Cy) regimens are gaining popularity and recent reports show promising results. We report our experience with nine pediatric patients with nonmalignant diseases who were transplanted from a haploidentical donor with PT-Cy. From 2015 to 2019, nine children with nonmalignant diseases underwent haploidentical HSCT with PT-Cy, two as a second transplant and seven as primary grafts after upfront serotherapy and busulfan-based myeloablative conditioning. Patient’s diseases included osteopetrosis (n = 5), congenital amegakaryocytic thrombocytopenia (n = 2), hemophagocytic lymphohistiocytosis (n = 1), and Wiskott Aldrich syndrome (n = 1). Two patients failed to engraft following upfront PT-Cy transplants, one was salvaged with a second PT-Cy transplant, and the other with a CD34+ selected graft. None of the patients suffered from graft-versus-host disease. Three patients died from early posttransplant infectious complications and six patients are alive and well. In conclusion, haploidentical HSCT with PT-Cy is a feasible option for pediatric patients with nonmalignant diseases lacking a matched donor.
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Acknowledgements
We thank our patients and their families for putting their trust in our care and allowing us to publish this paper. We thank our departmental nursing and administrative staff for their devoted work. We also thank Professor Zeev Rotstein, director of Hadassah Medical Center, for his support of our department. Shadur B’s position is supported by the Australian Government Research Training Program Scholarship and Hadassah, Australia. This work was supported by the Deutsche Forschungsgemeinschaft (Discovery and Evaluation of new Combined Immunodeficiency Disease Entities (DECIDE); grant DFG WA 1597/4-2) and the ERA-Net ERARE Consortium EURO-CID.
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Even-Or, E., NaserEddin, A., Dinur Schejter, Y. et al. Haploidentical stem cell transplantation with post-transplant cyclophosphamide for osteopetrosis and other nonmalignant diseases. Bone Marrow Transplant 56, 434–441 (2021). https://doi.org/10.1038/s41409-020-01040-9
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DOI: https://doi.org/10.1038/s41409-020-01040-9
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