Abstract
Sickle cell anemia (SCA) remains associated with high risks of morbidity and early death. Allogeneic hematopoietic SCT (HSCT) is the only curative treatment for SCA. We report our experience with transplantation in a group of patients with the non-Black African variant and the Black African variant of SCA. This study included 40 consecutive SCA patients (13 patients with the non-Black African variant and 27 with the Black African variant) who underwent BM transplantation from HLA-identical sibling donors between June 2004 and May 2013, following a myeloablative-conditioning regimen. All patients obtained sustained engraftment. One patient (non-Black African variant) became a stable mixed chimera with 25% donor cells more than 6 years after transplantation. The probabilities of survival, SCA-free survival and TRM at 5 years after transplant were 91%, 91% and 9%, respectively. All surviving patients remained free of any SCA-related events after transplantation. Our results confirm that it is possible to offer a greater than 90% chance of cure to children with SCA. HSCT should be considered the standard of care for who have an HLA-identical donor, before complications result from the sickling of RBC.
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Acknowledgements
We are very grateful to Professor Franklin Bunn for his precious criticism and advices during the development of this study. There is no funding source to declare.
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AI designed the research, analyzed data and wrote the paper. PS, MM, JG, KP, CG, LC, MR, CA, GDA, DA, OOA and TTW followed the clinical aspects of the patients. AA performed genetic analyses. MA and MT performed HLA typing and the assessment of chimerism. GL supervised the research and contributed to the writing of the paper. All authors approved the final manuscript.
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Lucarelli, G., Isgrò, A., Sodani, P. et al. Hematopoietic SCT for the Black African and non-Black African variants of sickle cell anemia. Bone Marrow Transplant 49, 1376–1381 (2014). https://doi.org/10.1038/bmt.2014.167
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DOI: https://doi.org/10.1038/bmt.2014.167