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Handgretinger R, Arendt AM, Maier CP, Lang P. Ex vivo and in vivo T-cell depletion in allogeneic transplantation: towards less or non-cytotoxic conditioning regimens. Expert Rev Clin Immunol 2022; 18:1285-1296. [PMID: 36220154 DOI: 10.1080/1744666x.2022.2134857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Although tremendous progress has been made since the introduction of allogeneic hematopoietic stem cell transplantation (HSCT) decades ago, there are still many obstacles to overcome. A major obstacle is the presence of T-lymphocytes in the recipient and in the donor. Recipient-derived T-lymphocytes not eliminated by the conditioning regimen are a major barrier and can lead to mixed chimerism or to complete rejection of the graft. Donor-derived T-lymphocytes can induce severe acute and chronic Graft-versus-Host Disease (GvHD). AREAS COVERED Currently published strategies for in vivo depletion of recipient-derived T-lymphocytes are discussed including the increase of the intensity of the conditioning regimen, the addition of anti-thymocyte globulin (ATG) or the anti-CD52 monoclonal antibody Campath. For the depletion or tolerization of the donor-derived T-lymphocytes, ex vivo-T-cell depletion methods, such as positive selection of CD34+ stem cells, negative depletion of CD3+ or TcRαβ+ T-lymphocytes or the use of post-transplant cyclophosphamide (PTCy) have been developed. EXPERT COMMENTARY All these currently used approaches have their disadvantages and new approaches should be investigated. In this review, we discuss current and propose new possible strategies to overcome the HLA barrier by using more specific T-cell directed therapies and/or by the combinations of current methods.
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Affiliation(s)
- Rupert Handgretinger
- Department of Hematology/Oncology. Children's University Hospital, University of Tuebingen, Germany.,Abu Dhabi Stem Cells Center, Abu Dhabi, UAE
| | - Anne-Marie Arendt
- Department of Hematology/Oncology. Children's University Hospital, University of Tuebingen, Germany
| | - Claus-Philipp Maier
- Department of Hematology/Oncology. Children's University Hospital, University of Tuebingen, Germany.,Department of Hematology, Oncology, Clinical Immunology and Rheumatology, Center for Internal Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Peter Lang
- Department of Hematology/Oncology. Children's University Hospital, University of Tuebingen, Germany
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Blank G, Welker C, Sipos B, Sonntag K, Müller F, Eckert F, Seitz C, Nadalin S, LaCorcia G, Königsrainer A, Snell D, Handgretinger R, Schilbach K. Preemptive administration of human αβ T cell receptor-targeting monoclonal antibody GZ-αβTCR potently abrogates aggressive graft-versus-host disease in vivo. Ann Hematol 2015; 94:1907-19. [PMID: 26264693 DOI: 10.1007/s00277-015-2471-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 08/03/2015] [Indexed: 10/23/2022]
Abstract
GVHD, both acute and chronic, remains the major cause of morbidity and mortality after allogeneic hematopoietic stem cell transplantation. Thus, there is still a great need for therapeutic tools for the prevention and treatment of GVHD. Several biologics have shown promising results in salvage therapies but are attendant on an increased risk for opportunistic infections, lymphoproliferative disorders, and relapse. This is partly due to efficient T cell elimination that neither dissects alloreactive from non-alloreactive T cells nor considers functional and structural distinctiveness of pathogen- and malignancy-reactive γδ and iNKT T cells. A novel, humanized monoclonal antibody, GZ-αβTCR, specific for the human αβ T cell receptor, was evaluated in a xenogeneic GVHD model for its potential to prevent or ameliorate GVHD and prolong survival. We could show that GZ-αβTCR significantly attenuated clinical signs of GVHD and prolonged survival by preferential depletion of CD4 cells and the naïve T cell compartment, the trigger and driver of GVHD. In a regimen that included a preemptive dose, GZ-αβTCR treatment sufficiently abrogated GVHD. Importantly, GZ-αβTCR's specificity spared host cell-mediated immune competence of cell types other than αβT cells: namely γδT cells. GZ-αβTCR's outstanding capacity to prevent GVHD and ameliorate an ongoing GVHD while sparing immune cells other than αβT cells strongly recommends GZ-αβTCR for the prevention and treatment of acute GVHD in clinical settings.
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Affiliation(s)
- Gregor Blank
- Department of General, Visceral and Transplantation Surgery, University Hospital Tübingen, Tübingen, Germany.,Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Christian Welker
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Bence Sipos
- Department of Pathology, University Hospital Tübingen, Tübingen, Germany
| | - Katja Sonntag
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Friederike Müller
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Franziska Eckert
- Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany
| | - Christian Seitz
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Silvio Nadalin
- Department of General, Visceral and Transplantation Surgery, University Hospital Tübingen, Tübingen, Germany
| | | | - Alfred Königsrainer
- Department of General, Visceral and Transplantation Surgery, University Hospital Tübingen, Tübingen, Germany
| | | | - Rupert Handgretinger
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany
| | - Karin Schilbach
- Department of Pediatric Hematology and Oncology, University Children's Hospital Tübingen, Hoppe-Seyler Street 1, 72076, Tübingen, Germany.
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