Abstract
Deficiency of the purine salvage enzyme adenosine deaminase leads to SCID (ADA-SCID). Hematopoietic cell transplantation (HCT) can lead to a permanent cure of SCID; however, little data are available on outcome of HCT for ADA-SCID in particular. In this multicenter retrospective study, we analyzed outcome of HCT in 106 patients with ADA-SCID who received a total of 119 transplants. HCT from matched sibling and family donors (MSDs, MFDs) had significantly better overall survival (86% and 81%) in comparison with HCT from matched unrelated (66%; P < .05) and haploidentical donors (43%; P < .001). Superior overall survival was also seen in patients who received unconditioned transplants in comparison with myeloablative procedures (81% vs 54%; P < .003), although in unconditioned haploidentical donor HCT, nonengraftment was a major problem. Long-term immune recovery showed that regardless of transplant type, overall T-cell numbers were similar, although a faster rate of T-cell recovery was observed after MSD/MFD HCT. Humoral immunity and donor B-cell engraftment was achieved in nearly all evaluable surviving patients and was seen even after unconditioned HCT. These data detail for the first time the outcomes of HCT for ADA-SCID and show that, if patients survive HCT, long-term cellular and humoral immune recovery is achieved.
Original language | English |
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Pages (from-to) | 3615-24; quiz 3626 |
Journal | Blood |
Volume | 120 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- Adenosine Deaminase
- Agammaglobulinemia
- Child
- Child, Preschool
- Female
- Graft Survival
- Hematopoietic Stem Cell Transplantation
- Histocompatibility Testing
- Humans
- Immunity, Cellular
- Immunity, Humoral
- Infant
- Infant, Newborn
- Kaplan-Meier Estimate
- Lymphocyte Count
- Male
- Myeloablative Agonists
- Retrospective Studies
- Severe Combined Immunodeficiency
- Siblings
- T-Lymphocytes
- Transplantation Conditioning
- Treatment Outcome
- Unrelated Donors