非血缘关系造血干细胞移植61例分析

Objective To study the therapeutic effectiveness, associated complications and related factors of unrelated allogeneic hematopoietic stem cell transplantation (URD-HSCT). Methods Sixty-one patients with malignant hematological diseases received URD-HSCT. All cases were subjected to myeloablative or nonmyeloablative conditioning regimen according to primary diseases. Among 61 patients, 21 were donor-recipient 6/6 HLA-matched, 5 were 5/6 HLA antigen-matched, 24 were 1 HLA gene subtype-mismatched, 11 were 2 HLA gene subtype-mismatched. Eighteen patients were ABO-compatible with donors, while 43 ABO-incompatible with donors. The median of infused donor nucleated cells was 4.5×108/kg, and the median of CD34+ cells were 4.3×106/kg. The graft-versus-host disease (GVHD) prevention regimens were based on short-term MTX, cyclosporin A and mycophenolate mofetil (MMF) regimen. Forty-nine cases also received CD25 Mab on the day of transplantation, and the day 4 after transplantation. Nine cases were also administrated with antilymphocyte globulin (ALG) or antithymocyte globulin (ATG). Two cases received ALG and CD25 Mab. Results Among 61 patients, 59 cases were successfully engrafted, which was identified by blood type, chromosome test and DNA polymorphism. Twenty-three cases developed grade Ⅱ～Ⅳ acute GVHD. Twenty-five patients experienced chronic GVHD. Infection of bacterial and/or fungal within 100 days after URD-HSCT was documented in 48 cases. Thirty-six cases had cytomegalovirus infection. Major infection site was lower respiratory tract. Eighteen cases died after URD-HSCT, and the 2-year disease-free survival rate was (68.0±6.4)%. Among these 18 deaths, 12 cases died because of transplantation related complications with the transplantation related mortality (TRM) being 19.7 %, and the remaining 6 cases died of relapse with the relapse rate being 9. 8 %, respectively. Conclusions URD-HSCT is an effective therapeutic strategy for malignant hematopoietic diseases when related donor is not available Acute GVHD and infection are risk factors of therapeutic effect and prognosis after URD-HSCT. Early prediction and prevention of acute GVHD and infection are essential problems to overcome.

Clinical retrospective analysis of 61 cases of unrelated donor hematopoietic stem cell transplantation