Transplante de progenitores hematopoyéticos (TPH) alogénico no mieloablativo: Casuística de un solo centro

The aim of this paper is to investigate the toxicity and demonstrate the feasibility and efficacy of hematopoietic graft from an HLA-identical related donor after non-myeloablative conditioning in patients with high-risk hematological diseases. Includes 37 patients who underwent a peripheral blood HSCT from HLA-identical sibling. The median of infused mononuclear cells, CD 3 + cells and CD 34 + cells, was 4.7 (1-9.7) x 108/Kg, 5,8 (1-36.3) x 107/Kg and 3.1 (1 .3-9) x 106/Kg, respectively. Neutrophil recovery occurred at 17 days postinfusion (7-9) and platelets at 15 post-infusion. In most patients detected a mixed chimerism became a full three months after transplantation, nine patients required donor lymphocyte infusion. The majority of which became fully mixed at 3 months after transplantation, 9 patients required the infusion of donor lymphocytes. Sixteen patients presented acute GVHD (42%) (7 of them grade III-IV), 2 developed hepatic veno-occlusive disease and 9 chronic GVHD. After a median follow up of 20 months, 14 patients (38%) are alive, 23 have died (62%), 9 (24%) for progression, 6 (16%) for acute GVHD and 8 (22%) for further complications. Overall survival actuarial 2 years is 32% (16-49 months) and progression-free survival of 60% (43-77 months). It is shown that the combination of a non-myeloablative conditioning with cytostatic and immunosuppressive drugs produces a moderate toxicity and allows the graft with total chimerism in patients not candidates for conventional transplantation high-risk