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Durable Cord Blood Cell Engraftment in a Patient with Severe Aplastic Anemia after a Matched Sibling Bone Marrow Transplantation and an Unrelated Cord Blood Transplantation. | LitMetric

AI Article Synopsis

  • * To enhance treatment effectiveness, the patient received an unrelated cord blood stem cell transplantation alongside the matched donor cells.
  • * Results showed successful blood formation, with the cord blood source becoming predominant over time, indicating its potential as a strong treatment option for older SAA patients.

Article Abstract

Objective: Severe aplastic anemia (SAA) is a fatal bone marrow failure disease. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) with a matched sibling donor is the first-line treatment for older SAA patients. However, the number of CD34 cells collected from a matched donor is often lower than expected. To overcome the problem, this study was conducted to combine a matched sibling donor with an unrelated cord blood transplantation for the treatment of a patient with SAA.

Case Report: A 45-year-old male patient with SAA was treated with a sibling-matched allo-HSCT. Due to the low amount of donor CD34 cells, an unrelated umbilical cord blood stem cell transplantation (UCBT) with 9/10 HLA matching was subsequently carried out. Successful hematopoietic reconstitution was achieved by the dual transplantation. Unexpectedly, beginning in the fourth month after transplantation, the sibling donor chimerism was transformed to a stable and complete UCB source.

Conclusion: This study provides evidence that UCB-derived HSCs have a higher capacity for hematopoietic reconstitution, suggesting that UCB plus an HLA-matched sibling donor is a good alternative for older patients with SAA.

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