Autologous recovery following non-myeloablative unrelated donor bone marrow transplantation for severe aplastic anaemia

Elebute, M.; Ball, S.; Gordon-Smith, E.; Sage, D.; Marsh, J.
July 2002
Annals of Hematology;Jun2002, Vol. 81 Issue 7, p378
Academic Journal
We report the outcome of nine unrelated bone marrow transplants performed for acquired severe aplastic anaemia at a single centre. Six patients received transplants from fully matched donors. Three donor/recipient pairs were mismatched, two at a single allele on high resolution typing. Pre-transplant conditioning consisted of cyclophosphamide and in vivo Campath-1 monoclonal antibody. One patient also received total body irradiation (TBI), and another patient with a coexisting paroxysmal nocturnal haemoglobinuria (PNH) clone received additional busulphan. Cyclosporin A was given for 12 months as prophylaxis against graft-versus-host disease (GVHD). Six of nine patients are alive and transfusion independent with a mean follow-up of 24 months (range: 1.5–94). All six patients who received fully matched transplants are alive; the three who received mismatched grafts died. Four long-term survivors developed autologous haematological recovery following rejection of their grafts. Acute GVHD grade II+ occurred in two patients. We highlight the importance of high-resolution HLA typing, including Cw matching in reducing the incidence of graft rejection and GVHD, resulting in improved survival in our patient group. This study also shows that autologous recovery with long-term survival can occur following non-irradiation conditioning regimens.


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