Haploidentical Transplants: Immune Reconstitution With and Without Augmentation Strategies

  • Antonio Di Stasi
  • Leo Luznik
Part of the Advances and Controversies in Hematopoietic Transplantation and Cell Therapy book series (ACHTCT)


Allogeneic hematopoietic cell transplantation (allo-HCT) is a lifesaving procedure for many neoplastic and nonmalignant hematologic disorders. As in HLA-matched transplantation, T-cell recovery after haplo-HCT relies on peripheral expansion of T-cells infused with the graft and the thymic reconstitution mediated by the precursors emerging from the donor progenitor cells. The reconstitution of T-cells in thymus is a slower process in adults, which usually explains a slower reconstitution in adults compared with children. CD4+ T-cells reconstitute later than CD8+ T-cells and depend more on thymic generation of naive T-cells with resulting inverted CD4+/CD8+ ratio earlier after allo-HCT. The B-cell compartment represents humoral immunity and in general has a slower recovery rate, as compared with T-cell compartment after allo-HCTs. The use of HLA-haploidentical donors has extended the applicability of allo-HCT for patients without HLA-matched donors. In this chapter we attempt to discuss current understanding of immune recovery and strategies to augment immune reconstitution after haploidentical transplantation.


Haploidentical transplants Immune CD4 CD8 Infections GvHD Relapse Mortality T-cell depletion Posttransplant Cyclophosphamide 


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Bone Marrow Transplantation and Cellular TherapyUniversity of Alabama at BirminghamBirminghamUSA
  2. 2.Department of Oncology, Hematologic MalignanciesJohns Hopkins University School of MedicineBaltimoreUSA

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