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The Journal of allergy and clinical immunology · 2017

T-cell receptor αβ+ and CD19+ cell-depleted haploidentical and mismatched hematopoietic stem cell transplantation in primary immune deficiency.

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Shah Ravi M, Elfeky Reem, Nademi Zohreh, Qasim Waseem, Amrolia Persis, Chiesa Robert, Rao Kanchan, Lucchini Giovanna, Silva Juliana M F, Worth Austen, Barge Dawn, Ryan David, Conn Jane, Cant Andrew J, Skinner Roderick, Abd Hamid Intan Juliana, Flood Terence, Abinun Mario, Hambleton Sophie, Gennery Andrew R, Veys Paul, Slatter Mary

Аннотация

BACKGROUND: Allogeneic hematopoietic stem cell transplantation (HSCT) is used as a therapeutic approach for primary immunodeficiencies (PIDs). The best outcomes have been achieved with HLA-matched donors, but when a matched donor is not available, a haploidentical or mismatched unrelated donor (mMUD) can be useful. Various strategies are used to mitigate the risk of graft-versus-host disease (GvHD) and rejection associated with such transplants.

OBJECTIVE: We sought to evaluate the outcomes of haploidentical or mMUD HSCT after depleting GvHD-causing T-cell receptor (TCR) αβ CD3+ cells from the graft.

METHODS: CD3+TCRαβ+/CD19+ depleted grafts were given in conditioned (except 3) children with PIDs. Treosulfan (busulfan in 1 patient), fludarabine, thiotepa, and anti-thymocyte globulin or alemtuzumab conditioning were used in 77% of cases, and all but 4 received GvHD prophylaxis.

RESULTS: Twenty-five patients with 12 types of PIDs received 26 HSCTs. Three underwent transplantation for refractory GvHD that developed after the first cord transplantation. At a median follow-up of 20.8 months (range, 5 month-3.3 years), 21 of 25 patients survived and were cured of underlying immunodeficiency. Overall and event-free survival at 3 years were 83.9% and 80.4%, respectively. Cumulative incidence of grade II to IV acute GvHD was 22% ± 8.7%. No case of visceral or chronic GvHD was seen. Cumulative incidences of graft failure, cytomegalovirus, and/or adenoviral infections and transplant-related mortality at 1 year were 4.2% ± 4.1%, 58.8% ± 9.8%, and 16.1% ± 7.4%, respectively. Patients undergoing transplantation with systemic viral infections had poor survival in comparison with those with absent or resolved infections (33.3% vs 100%).

CONCLUSION: CD3+TCRαβ+ and CD19+ cell-depleted haploidentical or mMUD HSCT is a practical and viable alternative for children with a range of PIDs.

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