Objective: To explore the efficacy and safety of HLA-mismatched stem-cell microtransplantation in patients with refractory lymphoma.
Methods: This study included 10 patients with relapsing or refractory lymphoma at Department of Hematology, Second Artillery General Hospital from October 2009 to February 2012. All patients received programmed infusions of G-CSF-mobilized HLA-mismatched donor peripheral blood stem cell (G-PBSC) after each cycle of Hyper-CVAD/MA conditioning without graft-versus-host disease (GVHD) prophylaxis.
Results: A total of 31 cycles of microtransplantation were performed. Among them, 6 patients achieved a complete remission (CR) and 2 got partial remission (PR). And the overall response was 8/10. The occurrence of grades III-IV neutrocytopenia and thrombocytopenia was almost 100% after Hyper-CVAD/MA conditioning, but the median recovery times of neutrophils and platelets were 9 days and 14 days respectively because of programmed infusions of G-PBSCs. And 18 bouts of G-PBSC infusion related fever were observed. No GVHD was observed in any of them during treatment. Up to March 2013, 6 patients survived while another 4 died. The 1- and 3-year overall survival and disease-free survival rates were the same (60%).
Conclusion: The novel therapy of microtransplantation may improve outcome and avoid GVHD in patients with relapsing or refractory lymphoma.
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