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  • Title: Haploidentical T Cell-Replete Transplantation with Post-Transplantation Cyclophosphamide for Patients in or above the Sixth Decade of Age Compared with Allogeneic Hematopoietic Stem Cell Transplantation from an Human Leukocyte Antigen-Matched Related or Unrelated Donor.
    Author: Blaise D, Fürst S, Crocchiolo R, El-Cheikh J, Granata A, Harbi S, Bouabdallah R, Devillier R, Bramanti S, Lemarie C, Picard C, Chabannon C, Weiller PJ, Faucher C, Mohty B, Vey N, Castagna L.
    Journal: Biol Blood Marrow Transplant; 2016 Jan; 22(1):119-24. PubMed ID: 26341397.
    Abstract:
    It has recently been shown that a T cell-replete allogeneic (allo) hematopoietic stem cell transplantation (HSCT) from a haploidentical donor (haplo-ID) could be a valid treatment for hematological malignancies. However, little data exist concerning older populations. We provided transplantation to 31 patients over the age of 55 years from a haplo-ID and compared their outcomes with patients of the same ages who underwent transplantation from a matched related (MRD) or an unrelated donor (UD). All 3 groups were comparable, except for their conditioning. Patients in haplo-ID group received 2 days of post-transplantation high-dose cyclophosphamide followed by cyclosporine A and mycophenolate mofetil, whereas patients in other groups received pretransplantation antithymocyte globulin, cyclosporine A, and additional mycophenolate mofetil in case of 1-antigen mismatch. All patients but 1 in the haplo-ID group engrafted. The incidence of grades 2 to 4 acute graft-versus-host disease (GVHD) was not statistically different between recipients from haplo-ID (cumulative incidence, 23%) and MRD (cumulative incidence, 21%) transplantations but it was lower than after UD HSCT (cumulative incidence, 44%). No patient in the haplo-ID group developed severe chronic GVHD, compared with cumulative incidences of 16% and 14% after MRD (P = .02) and UD (P = .03) grafts, respectively. The cumulative incidences of relapse were similar in the 3 groups, whereas nonrelapse mortality after UD HSCT was 3-fold higher than after haplo-ID or MRD HSCT. Overall, 2-year overall survival (70%), progression-free survival (67%), and progression and severe chronic GVHD-free survival (67%) probabilities after haplo-ID did not statistically differ from MRD transplantation (78%, 64%, and 51%, respectively), although they were higher than after UD transplantation (51% [P = .08], 38% [P = .02], and 31% [P = .007]). We conclude that T cell-replete haplo-ID HSCT followed by post-transplantation high-dose- cyclophosphamide in patients over 55 years is associated with promising results, similar to MRD HSCT, and is deserving prospective evaluation.
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