1
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Tameni A, Toffalori C, Vago L. Tricking the trickster: precision medicine approaches to counteract leukemia immune escape after transplant. Blood 2024; 143:2710-2721. [PMID: 38728431 DOI: 10.1182/blood.2023019962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 04/08/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
ABSTRACT Over the last decades, significant improvements in reducing the toxicities of allogeneic hematopoietic cell transplantation (allo-HCT) have widened its use as consolidation or salvage therapy for high-risk hematological malignancies. Nevertheless, relapse of the original malignant disease remains an open issue with unsatisfactory salvage options and limited rationales to select among them. In the last years, several studies have highlighted that relapse is often associated with specific genomic and nongenomic mechanisms of immune escape. In this review we summarize the current knowledge about these modalities of immune evasion, focusing on the mechanisms that leverage antigen presentation and pathologic rewiring of the bone marrow microenvironment. We present examples of how this biologic information can be translated into specific approaches to treat relapse, discuss the status of the clinical trials for patients who relapsed after a transplant, and show how dissecting the complex immunobiology of allo-HCT represents a crucial step toward developing new personalized approaches to improve clinical outcomes.
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Affiliation(s)
- Annalisa Tameni
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Vita-Salute San Raffaele University, Milan, Italy
| | - Cristina Toffalori
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Vita-Salute San Raffaele University, Milan, Italy
| | - Luca Vago
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Vita-Salute San Raffaele University, Milan, Italy
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
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2
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Amokrane K, Cherel M, Rouzaire PO, Walencik A, Dubois V. [Relapse with HLA loss after hematopoietic stem cell transplantation with non-HLA identical donor: Guidelines from the Francophone society of bone marrow transplantation and cellular therapy (SFGM-TC)]. Bull Cancer 2024; 111:S14-S21. [PMID: 37061368 DOI: 10.1016/j.bulcan.2023.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 04/17/2023]
Abstract
Loss of heterozygosity or HLA loss is a genomic-type escape mechanism highlighted in certain types of relapses after allogeneic hematopoietic stem cell transplantation with a non-HLA identical donor, and especially after haplo-identical transplantation. The diagnosis must be made with certainty because the result conditions the therapy. In this article, the different mechanisms and techniques that can be used for the diagnosis of loss of heterozygosity, as well as the therapeutic options are reviewed, making it possible to establish clinico-biological recommendations for the diagnosis confirmation and management of the patients in relapse.
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Affiliation(s)
- Kahina Amokrane
- Gustave-Roussy, centre de lutte contre le cancer, 114, rue Édouard-Vaillant, 94805 Villejuif, France
| | | | - Paul-Olivier Rouzaire
- EA(UR)7453 CHELTER-université de Clermont Auvergne, service d'histocompatibilité et d'immunogénétique, CHU de Clermont-Ferrand, Clermont-Ferrand, France
| | - Alexandre Walencik
- EFS Centre-Pays de la Loire, laboratoire histocompatibilité, Nantes, France
| | - Valérie Dubois
- Laboratoire HLA, EFS Auvergne Rhône Alpes, Lyon, France.
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3
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Filippini Velázquez G, Labopin M, Tischer J, Raiola AM, Angelucci E, Kulagin AD, Galieni P, Bermúdez A, Bulabois CE, Kröger N, Díez-Martín JL, Kwon M, Nagler A, Schmid C, Ciceri F, Mohty M. Second haploidentical stem cell transplantation (HAPLO-SCT2) after relapse from a first HAPLO-SCT in acute leukaemia-a study on behalf of the Acute Leukaemia Working Party (ALWP) of the European Society for Blood and Marrow Transplantation (EBMT). Bone Marrow Transplant 2023; 58:907-915. [PMID: 37160941 PMCID: PMC10400422 DOI: 10.1038/s41409-023-01985-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/20/2023] [Accepted: 04/04/2023] [Indexed: 05/11/2023]
Abstract
For patients with acute myeloid and lymphoblastic leukaemia (AML/ALL) lacking a matched sibling or unrelated donor, haploidentical stem cell transplantation (HAPLO-SCT) is increasingly used. However, available data on the treatment of relapse after HAPLO-SCT, including feasibility and efficacy of a second HAPLO-SCT (HAPLO-SCT2), is scarce. Hence, adults with AML/ALL, that had undergone HAPLO-SCT2 without ex-vivo manipulation after haematologic relapse from HAPLO-SCT1 were selected for a retrospective registry analysis. Eighty-two patients (AML, n = 63, ALL, n = 19, median follow-up: 33 months) were identified. Engraftment rate was 87%. At day +180, cumulative incidences of acute GvHD II-IV°/chronic GvHD were 23.9%/22.6%, respectively. Two-year overall survival/leukaemia-free survival (OS/LFS) were 34.3%/25.4%; 2-year non-relapse mortality (NRM) and relapse incidence (RI) were 17.6% and 57%. Leukaemia was the most frequent cause of death. Separated by disease, 2-year OS/LFS/NRM/RI were 28.7%/22.3%/16.2%/61.6% in AML, and 55.3%/38.4%/23.5%/38.2% in ALL patients. In a risk-factor analysis among patients with AML, stage at HAPLO-SCT1 and HAPLO-SCT2, and interval from HAPLO-SCT1 to relapse significantly influenced outcome. Our data demonstrate that HAPLO-SCT2 is a viable option in acute leukaemia relapse after HAPLO-SCT1. Engraftment, toxicity, risk factors and long-term outcome are comparable to data reported after allo-SCT2 in a matched donor setting.
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Affiliation(s)
| | - Myriam Labopin
- EBMT Paris Study Unit, Saint-Antoine Hospital, Paris, France
- Department of Haematology, Hôpital Saint-Antoine, Sorbonne University, INSERM UMRs 938, Paris, France
| | - Johanna Tischer
- Department of Internal Medicine III, University Hospital of Munich, Campus Grosshadern, Munich, Germany
| | - Anna Maria Raiola
- Hematology and cellular therapy unit, IRCCS Ospedale Policlinico San Martino, Genova, Italy
| | - Emanuele Angelucci
- Hematology and cellular therapy unit, IRCCS Ospedale Policlinico San Martino, Genova, Italy
| | - Alexander D Kulagin
- RM Gorbacheva Research Institute, Pavlov University, St. Petersburg, Russian Federation
| | - Piero Galieni
- Haematology Service, Mazzoni Hospital, Ascoli Piceno, Italy
| | - Arancha Bermúdez
- Servicio de Hematología-Hemoterapia, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Claude-Eric Bulabois
- Service d'Hématologie, CHU Grenoble Alpes-Université Grenoble Alpes, Grenoble, France
| | - Nicolaus Kröger
- University Medical Center Hamburg-Eppendorf, Department of Stem Cell Transplantation, Hamburg, Germany
| | | | - Mi Kwon
- Sección de Trasplante de Médula Ósea, Hospital Gregorio Marañón, Madrid, Spain
| | - Arnon Nagler
- Hematology and Bone Marrow Transplant Unit, Chaim Sheba Medical Center, Tel Hashomer, Israel
| | - Christoph Schmid
- Section for Stem Cell Transplantation, Augsburg University Hospital and Medical Faculty, Augsburg, Germany.
| | - Fabio Ciceri
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
| | - Mohamad Mohty
- Department of Haematology, Hôpital Saint-Antoine, Sorbonne University, INSERM UMRs 938, Paris, France
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4
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Biederstädt A, Rezvani K. How I treat high-risk acute myeloid leukemia using preemptive adoptive cellular immunotherapy. Blood 2023; 141:22-38. [PMID: 35512203 PMCID: PMC10023741 DOI: 10.1182/blood.2021012411] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 01/21/2023] Open
Abstract
Allogeneic hematopoietic stem cell transplantation (alloHSCT) is a potentially curative treatment for patients with high-risk acute leukemias, but unfortunately disease recurrence remains the major cause of death in these patients. Infusion of donor lymphocytes (DLI) has the potential to restore graft-versus-leukemia immunologic surveillance; however, efficacy varies across different hematologic entities. Although relapsed chronic myeloid leukemia, transplanted in chronic phase, has proven remarkably susceptible to DLI, response rates are more modest for relapsed acute myeloid leukemia and acute lymphoblastic leukemia. To prevent impending relapse, a number of groups have explored administering DLI preemptively on detection of measurable residual disease (MRD) or mixed chimerism. Evidence for the effectiveness of this strategy, although encouraging, comes from only a few, mostly single-center retrospective, nonrandomized studies. This article seeks to (1) discuss the available evidence supporting this approach while highlighting some of the inherent challenges of MRD-triggered treatment decisions post-transplant, (2) portray other forms of postremission cellular therapies, including the role of next-generation target-specific immunotherapies, and (3) provide a practical framework to support clinicians in their decision-making process when considering preemptive cellular therapy for this difficult-to-treat patient population.
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Affiliation(s)
- Alexander Biederstädt
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX
- Department of Medicine III: Hematology and Oncology, School of Medicine, Technical University of Munich, Munich, Germany
| | - Katayoun Rezvani
- Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX
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5
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Arnold PY. Review: HLA loss and detection in the setting of relapse from HLA-mismatched hematopoietic cell transplant. Hum Immunol 2022; 83:712-720. [DOI: 10.1016/j.humimm.2022.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/09/2022] [Accepted: 03/02/2022] [Indexed: 01/25/2023]
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6
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Blouin AG, Askar M. Chimerism analysis for clinicians: a review of the literature and worldwide practices. Bone Marrow Transplant 2022; 57:347-359. [PMID: 35082369 DOI: 10.1038/s41409-022-01579-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 12/18/2021] [Accepted: 01/12/2022] [Indexed: 11/09/2022]
Abstract
This review highlights literature pertinent to chimerism analysis in the context of hematopoietic cell transplantation (HCT). We also conducted a survey of testing practices of program members of CIBMTR worldwide. Questions included testing methods, time points, specimen type, cell lineage tested and testing indications. Recent literature suggests that detection of low level mixed chimerism has a clinical utility in predicting relapse. There is also increasing recognition of HLA loss relapse to potentially guide rescue decisions in cases of relapse. These developments coincide with wider access to high sensitivity next generation sequencing (NGS) in clinical laboratories. Our survey revealed a heterogeneity in practices as well as in findings and conclusions of published studies. Although the most commonly used method is STR, studies support more sensitive methods such as NGS, especially for predicting relapse. There is no conclusive evidence to support testing chimerism in BM over PB, particularly when using a high sensitivity testing method. Periodic monitoring of chimerism especially in diagnoses with a high risk of relapse is advantageous. Lineage specific chimerism is more sensitive than whole blood in predicting impending relapse. Further studies that critically assess how to utilize chimerism testing results will inform evidence based clinical management decisions.
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Affiliation(s)
- Amanda G Blouin
- Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Medhat Askar
- Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA. .,Department of Pathology & Laboratory Medicine, Baylor University Medical Center, Dallas, TX, USA. .,Department of Pathology and Laboratory Medicine, Texas A&M Health Science Center College of Medicine, Bryan, TX, USA. .,National Donor Marrow Program (NMDP)/Be The Match, Minneapolis, MN, USA.
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7
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Wang A, Li W, Zhao F, Zheng Z, Yang T, Wang S, Yan J, Lan J, Fan S, Zhao M, Shen J, Li X, Yang T, Lu Q, Lu Y, Bai H, Zhang H, Cai D, Wang L, Yuan Z, Jiang E, Zhou F, Song X. Clinical Characteristics and Outcome Analysis for HLA Loss Patients Following Partially Mismatched Related Donor Transplantation Using HLA Chimerism for Loss of Heterozygosity Analysis by Next-Generation Sequencing. Cell Transplant 2022; 31:9636897221102902. [PMID: 35670196 PMCID: PMC9178980 DOI: 10.1177/09636897221102902] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Genomic loss of mismatched human leukocyte antigen (HLA loss) is one of the most vital immune escape mechanisms of leukemic cells after allogeneic hematopoietic stem cell transplantation (allo-HSCT). However, the methods currently used for HLA loss analysis have some shortcomings. Limited literature has been published, especially in lymphoid malignancies. This study aims to evaluate the incidences, risk factors of HLA loss, and clinical outcomes of HLA loss patients. In all, 160 patients undergoing partially mismatched related donor (MMRD) transplantation from 18 centers in China were selected for HLA loss analysis with the next-generation sequencing (NGS)-based method, which was validated by HLA-KMR. Variables of the prognostic risk factors for HLA loss or HLA loss–related relapse were identified with the logistic regression or the Fine and Gray regression model. An HLA loss detection system, HLA-CLN [HLA chimerism for loss of heterozygosity (LOH) analysis by NGS], was successfully developed. Forty (25.0%) patients with HLA loss were reported, including 27 with myeloid and 13 with lymphoid malignancies. Surprisingly, 6 of those 40 patients did not relapse. The 2-year cumulative incidences of HLA loss (22.7% vs 22.0%, P = 0.731) and HLA loss–related relapse (18.4% vs 20.0%, P = 0.616) were similar between patients with myeloid and lymphoid malignancies. The number of HLA mismatches (5/10 vs <5/10) was significantly associated with HLA loss in the whole cohort [odds ratio (OR): 3.15, P = 0.021] and patients with myeloid malignancies (OR: 3.94, P = 0.021). A higher refined-disease risk index (OR: 6.91, P = 0.033) and donor–recipient ABO incompatibility (OR: 4.58, P = 0.057) contributed to HLA loss in lymphoid malignancies. To sum up, HLA-CLN could overcome the limitations of HLA-KMR and achieve a better HLA coverage for more patients. The clinical characteristics and outcomes were similar in patients with HLA loss between myeloid and lymphoid malignancies. In addition, the results suggested that a patient with HLA loss might not always relapse.
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Affiliation(s)
- Andi Wang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenjun Li
- Department of Hematology, No. 960 Hospital of People's Liberation Army, Jinan, China
| | - Fei Zhao
- Department of Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | | | - Ting Yang
- Department of Hematology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Sanbin Wang
- Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, China
| | - Jinsong Yan
- Department of Hematology, Liaoning Medical Center for Hematopoietic Stem Cell Transplantation, Second Hospital of Dalian Medical University, Dalian, China
| | - Jianpin Lan
- Department of Hematology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Shengjin Fan
- Department of Hematology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Mingfeng Zhao
- Department of Hematology, Tianjin First Central Hospital, Tianjin, China
| | - Jianpin Shen
- Department of Hematology, Zhejiang Provincial Hospital of Chinese Medicine, Hangzhou, China
| | - Xin Li
- Department of Hematology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Tonghua Yang
- Department of Hematology, First People's Hospital of Yunnan Province, Kunming University of Science and Technology Affiliated Kun Hua Hospital, Kunming, China
| | - Quanyi Lu
- Department of Hematology, Zhongshan Hospital of Xiamen University, Xiamen, China
| | - Ying Lu
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
| | - Hai Bai
- Department of Hematology, The 940th Hospital of the Joint Logistic Support Force of PLA, Lanzhou, China
| | - Haiyan Zhang
- Department of Hematology, Linyi People's Hospital, Linyi, China
| | - Dali Cai
- Department of Hematology, The First Hospital of China Medical University, Shenyang, China
| | - Ling Wang
- Department of Hematology, Affiliated Qingdao Central Hospital, Qingdao University, Qingdao, China
| | - Zhiyang Yuan
- Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - Erlie Jiang
- Department of Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Fang Zhou
- Department of Hematology, No. 960 Hospital of People's Liberation Army, Jinan, China
| | - Xianmin Song
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee, Shanghai, China
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8
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Kunadt D, Stölzel F. Effective Immunosurveillance After Allogeneic Hematopoietic Stem Cell Transplantation in Acute Myeloid Leukemia. Cancer Manag Res 2021; 13:7411-7427. [PMID: 34594134 PMCID: PMC8478160 DOI: 10.2147/cmar.s261721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/15/2021] [Indexed: 12/25/2022] Open
Abstract
The number of patients receiving allogeneic hematopoietic stem cell transplantation (alloHCT) has increased constantly over the last years due to advances in transplant technology development, supportive care, transplant safety, and donor availability. Currently, acute myeloid leukemia (AML) is the most frequent indication for alloHCT. However, disease relapse remains the main cause of therapy failure. Therefore, concepts of maintaining and, if necessary, reinforcing a strong graft-versus-leukemia (GvL) effect is crucial for the prognosis and long-term survival of the patients. Over the last decades, it has become evident that effective immunosurveillance after alloHCT is an entangled complex of donor-specific characteristics, leukemia-associated geno- and phenotypes, and acquired resistance mechanisms. Furthermore, adoption of effector cells such as natural killer (NK) cells, alloreactive and regulatory T-cells with their accompanying receptor repertoire, and cell–cell interactions driven by messenger molecules within the stem cell and the bone marrow niche have important impact. In this review of pre- and posttransplant elements and mechanisms of immunosurveillance, we highlight the most important mechanisms after alloHCT.
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Affiliation(s)
- Desiree Kunadt
- Department of Internal Medicine I, University Hospital Carl Gustav Carus, Technical University of Dresden, Dresden, Germany
| | - Friedrich Stölzel
- Department of Internal Medicine I, University Hospital Carl Gustav Carus, Technical University of Dresden, Dresden, Germany
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9
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Blouin AG, Ye F, Williams J, Askar M. A practical guide to chimerism analysis: Review of the literature and testing practices worldwide. Hum Immunol 2021; 82:838-849. [PMID: 34404545 DOI: 10.1016/j.humimm.2021.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/30/2021] [Accepted: 07/26/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE Currently there are no widely accepted guidelines for chimerism analysis testing in hematopoietic cell transplantation (HCT) patients. The objective of this review is to provide a practical guide to address key aspects of performing and utilizing chimerism testing results. In developing this guide, we conducted a survey of testing practices among laboratories that are accredited for performing engraftment monitoring/chimerism analysis by either the American Society for Histocompatibility & Immunogenetics (ASHI) and/or the European Federation of Immunogenetics (EFI). We interpreted the survey results in the light of pertinent literature as well as the experience in the laboratories of the authors. RECENT DEVELOPMENTS In recent years there has been significant advances in high throughput molecular methods such as next generation sequencing (NGS) as well as growing access to these technologies in histocompatibility and immunogenetics laboratories. These methods have the potential to improve the performance of chimerism testing in terms of sensitivity, availability of informative genetic markers that distinguish donors from recipients as well as cost. SUMMARY The results of the survey revealed a great deal of heterogeneity in chimerism testing practices among participating laboratories. The most consistent response indicated monitoring of engraftment within the first 30 days. These responses are reflective of published literature. Additional clinical indications included early detection of impending relapse as well as identification of cases of HLA-loss relapse.
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Affiliation(s)
- Amanda G Blouin
- Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Fei Ye
- Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Jenifer Williams
- Department of Pathology & Laboratory Medicine, Baylor University Medical Center, Dallas, TX, United States
| | - Medhat Askar
- Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, United States; Department of Pathology & Laboratory Medicine, Baylor University Medical Center, Dallas, TX, United States; Department of Pathology and Laboratory Medicine, Texas A&M Health Science Center College of Medicine, United States.
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10
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Muñiz P, Kwon M, Carbonell D, Chicano M, Bailén R, Oarbeascoa G, Suárez-González J, Andrés-Zayas C, Menárguez J, Dorado N, Gómez-Centurión I, Anguita J, Díez-Martín JL, Martínez-Laperche C, Buño I. Clinical Utility of the Detection of the Loss of the Mismatched HLA in Relapsed Hematological Patients After Haploidentical Stem Cell Transplantation With High-Dose Cyclophosphamide. Front Immunol 2021; 12:642087. [PMID: 33841425 PMCID: PMC8027082 DOI: 10.3389/fimmu.2021.642087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/24/2021] [Indexed: 11/13/2022] Open
Abstract
Haploidentical hematopoietic stem cell transplantation (Haplo-HSCT) with high-dose cyclophosphamide (PTCy) has resulted in a low incidence of graft-vs.-host disease (GVHD), graft failure, and non-relapse mortality. However, post-transplantation relapse remains a common cause of treatment failure in high-risk patients. Unraveling the mechanisms of relapse is therefore crucial for designing effective relapse treatment strategies. One of these mechanisms is the loss of the mismatched HLA on the recipient's leukemic cells. To study the incidence and clinical relevance of this phenomenon, we analyzed 181 patients treated with Haplo-HSCT with PTCy (2007–2019), of which 37 relapsed patients after transplantation. According to the kit employed for HLA-loss analysis, among 22 relapsed patients, we identified HLA loss at relapse in 6 of the 22 patients (27%) studied. Based on the results obtained, the genomic loss of HLA was more common in females than males (66 vs. 33%) and HLA-loss relapses occurred later than classical relapses (345 vs. 166 days). Moreover, the patients with HLA-loss had a greater presence of active disease at the time of transplantation and had undergone a larger number of treatment lines than the group with classical relapses (66 vs. 43% and 66 vs. 18%, respectively). Four of these relapses were studied retrospectively, while two were studied prospectively, the results of which could be considered for patient management. Additionally, two relapsed patients analyzed retrospectively had myeloid neoplasms. One patient had not undergone any treatment, and three had undergone donor lymphocyte infusions (DLIs) and chemotherapy. All presented severe GVHD and disease progression. In contrast, the two patients studied prospectively had a lymphoid neoplasm and were not treated with DLIs. One of them was treated with chemotherapy but died from disease progression, and the other patient underwent a second Haplo-HSCT from a different donor and is still alive. We can conclude that the detection of HLA-loss at the onset of relapse after Haplo-HSCT with PTCy could help in clinical practice to select appropriate rescue treatment, thereby avoiding the use of DLIs or a second transplantation from the same donor.
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Affiliation(s)
- Paula Muñiz
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Mi Kwon
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Diego Carbonell
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - María Chicano
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Rebeca Bailén
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Gillen Oarbeascoa
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Julia Suárez-González
- Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain.,Genomics Unit, Gregorio Marañón General University Hospital, Madrid, Spain
| | - Cristina Andrés-Zayas
- Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain.,Genomics Unit, Gregorio Marañón General University Hospital, Madrid, Spain
| | - Javier Menárguez
- Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain.,Pathology Department, Gregorio Marañón General University Hospital, Madrid, Spain
| | - Nieves Dorado
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Ignacio Gómez-Centurión
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Javier Anguita
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - José Luis Díez-Martín
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain.,Department of Medicine, School of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Carolina Martínez-Laperche
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain
| | - Ismael Buño
- Department of Hematology, Gregorio Marañón General University Hospital, Madrid, Spain.,Gregorio Marañón Health Research Institute (IiSGM), Madrid, Spain.,Genomics Unit, Gregorio Marañón General University Hospital, Madrid, Spain.,Department of Cell Biology, School of Medicine, Complutense University of Madrid, Madrid, Spain
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11
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Rovatti PE, Gambacorta V, Lorentino F, Ciceri F, Vago L. Mechanisms of Leukemia Immune Evasion and Their Role in Relapse After Haploidentical Hematopoietic Cell Transplantation. Front Immunol 2020; 11:147. [PMID: 32158444 PMCID: PMC7052328 DOI: 10.3389/fimmu.2020.00147] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 01/20/2020] [Indexed: 01/05/2023] Open
Abstract
Over the last decade, the development of multiple strategies to allow the safe transfer from the donor to the patient of high numbers of partially HLA-incompatible T cells has dramatically reduced the toxicities of haploidentical hematopoietic cell transplantation (haplo-HCT), but this was not accompanied by a similar positive impact on the incidence of post-transplantation relapse. In the present review, we will elaborate on how the unique interplay between HLA-mismatched immune system and malignancy that characterizes haplo-HCT may impact relapse biology, shaping the selection of disease variants that are resistant to the “graft-vs.-leukemia” effect. In particular, we will present current knowledge on genomic loss of HLA, a relapse modality first described in haplo-HCT and accounting for a significant proportion of relapses in this setting, and discuss other more recently identified mechanisms of post-transplantation immune evasion and relapse, including the transcriptional downregulation of HLA class II molecules and the enforcement of inhibitory checkpoints between T cells and leukemia. Ultimately, we will review the available treatment options for patients who relapse after haplo-HCT and discuss on how a deeper insight into relapse immunobiology might inform the rational and personalized selection of therapies to improve the largely unsatisfactory clinical outcome of relapsing patients.
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Affiliation(s)
- Pier Edoardo Rovatti
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy.,Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Valentina Gambacorta
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy.,Unit of Senescence in Stem Cell Aging, Differentiation and Cancer, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesca Lorentino
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Fabio Ciceri
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy.,Vita-Salute San Raffaele University, Milan, Italy
| | - Luca Vago
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, IRCCS San Raffaele Scientific Institute, Milan, Italy.,Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
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12
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McCurdy SR, Luznik L. How we perform haploidentical stem cell transplantation with posttransplant cyclophosphamide. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2019; 2019:513-521. [PMID: 31808908 PMCID: PMC6913422 DOI: 10.1182/hematology.2019001323] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
HLA-haploidentical hematopoietic stem cell transplantation is now one of the most commonly employed alternative donor techniques, with most centers applying T-cell-replete strategies such as that developed by the Baltimore group using high-dose posttransplant cyclophosphamide. HLA-haploidentical hematopoietic stem cell transplantation using posttransplant cyclophosphamide is associated with low rates of severe graft-versus-host disease and nonrelapse mortality and does not require graft manipulation or storage, which results in a low graft acquisition cost. Its remarkable safety when used with reduced-intensity conditioning has been demonstrated in patients up to 75 years old with outcomes similar to those of patients in their 50s. Several large, registry-based retrospective studies have confirmed the efficacy of HLA-haploidentical hematopoietic stem cell transplantation with posttransplant cyclophosphamide, achieving results comparable to those of HLA-matched hematopoietic stem cell transplantation. In this article, we describe our approach to this rapidly available and clinically simple platform and address some of the key clinical questions associated with its use.
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Affiliation(s)
- Shannon R McCurdy
- Abramson Cancer Center and
- Division of Hematology and Oncology, Hospital of the University of Pennsylvania, Philadelphia, PA; and
| | - Leo Luznik
- Department of Oncology and
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
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13
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Vago L. Clonal evolution and immune evasion in posttransplantation relapses. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2019; 2019:610-616. [PMID: 31808847 PMCID: PMC6913457 DOI: 10.1182/hematology.2019000005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Despite the considerable improvements witnessed over the last few decades in the feasibility and safety of allogeneic hematopoietic cell transplantation (allo-HCT) for hematological malignancies, disease relapse continues to represent a frequent occurrence, with largely unsatisfactory salvage options. Recent studies have shed new light on the biology of posttransplantation relapses, demonstrating that they can frequently be explained using an evolutionary perspective: The changes in disease clonal structure and immunogenicity that are often documented at relapse may in fact represent the end results of a process of selection, allowing the outgrowth of variants that are more capable of resisting the therapeutic control of allo-HCT. This review provides an overview of the mechanisms forming the basis of relapse, including clonal evolution, gain of tropism for privileged sites, genomic and nongenomic changes in the HLA asset, and enforcement of immune checkpoints. Finally, this review discusses how these mechanisms may combine in complex patterns and how understanding and untangling these interactions may provide key knowledge for the selection of personalized therapeutic approaches.
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Affiliation(s)
- Luca Vago
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, and
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
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14
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McCurdy SR, Luznik L. How we perform haploidentical stem cell transplantation with posttransplant cyclophosphamide. Blood 2019; 134:1802-1810. [PMID: 31751485 PMCID: PMC6872960 DOI: 10.1182/blood.2019001323] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 09/09/2019] [Indexed: 12/19/2022] Open
Abstract
HLA-haploidentical hematopoietic stem cell transplantation is now one of the most commonly employed alternative donor techniques, with most centers applying T-cell-replete strategies such as that developed by the Baltimore group using high-dose posttransplant cyclophosphamide. HLA-haploidentical hematopoietic stem cell transplantation using posttransplant cyclophosphamide is associated with low rates of severe graft-versus-host disease and nonrelapse mortality and does not require graft manipulation or storage, which results in a low graft acquisition cost. Its remarkable safety when used with reduced-intensity conditioning has been demonstrated in patients up to 75 years old with outcomes similar to those of patients in their 50s. Several large, registry-based retrospective studies have confirmed the efficacy of HLA-haploidentical hematopoietic stem cell transplantation with posttransplant cyclophosphamide, achieving results comparable to those of HLA-matched hematopoietic stem cell transplantation. In this article, we describe our approach to this rapidly available and clinically simple platform and address some of the key clinical questions associated with its use.
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Affiliation(s)
- Shannon R McCurdy
- Abramson Cancer Center and
- Division of Hematology and Oncology, Hospital of the University of Pennsylvania, Philadelphia, PA; and
| | - Leo Luznik
- Department of Oncology and
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD
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15
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Toffalori C, Zito L, Gambacorta V, Riba M, Oliveira G, Bucci G, Barcella M, Spinelli O, Greco R, Crucitti L, Cieri N, Noviello M, Manfredi F, Montaldo E, Ostuni R, Naldini MM, Gentner B, Waterhouse M, Zeiser R, Finke J, Hanoun M, Beelen DW, Gojo I, Luznik L, Onozawa M, Teshima T, Devillier R, Blaise D, Halkes CJM, Griffioen M, Carrabba MG, Bernardi M, Peccatori J, Barlassina C, Stupka E, Lazarevic D, Tonon G, Rambaldi A, Cittaro D, Bonini C, Fleischhauer K, Ciceri F, Vago L. Immune signature drives leukemia escape and relapse after hematopoietic cell transplantation. Nat Med 2019; 25:603-611. [PMID: 30911134 DOI: 10.1038/s41591-019-0400-z] [Citation(s) in RCA: 246] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 02/15/2019] [Indexed: 01/17/2023]
Abstract
Transplantation of hematopoietic cells from a healthy individual (allogeneic hematopoietic cell transplantation (allo-HCT)) demonstrates that adoptive immunotherapy can cure blood cancers: still, post-transplantation relapses remain frequent. To explain their drivers, we analyzed the genomic and gene expression profiles of acute myeloid leukemia (AML) blasts purified from patients at serial time-points during their disease history. We identified a transcriptional signature specific for post-transplantation relapses and highly enriched in immune-related processes, including T cell costimulation and antigen presentation. In two independent patient cohorts we confirmed the deregulation of multiple costimulatory ligands on AML blasts at post-transplantation relapse (PD-L1, B7-H3, CD80, PVRL2), mirrored by concomitant changes in circulating donor T cells. Likewise, we documented the frequent loss of surface expression of HLA-DR, -DQ and -DP on leukemia cells, due to downregulation of the HLA class II regulator CIITA. We show that loss of HLA class II expression and upregulation of inhibitory checkpoint molecules represent alternative modalities to abolish AML recognition from donor-derived T cells, and can be counteracted by interferon-γ or checkpoint blockade, respectively. Our results demonstrate that the deregulation of pathways involved in T cell-mediated allorecognition is a distinctive feature and driver of AML relapses after allo-HCT, which can be rapidly translated into personalized therapies.
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Affiliation(s)
- Cristina Toffalori
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Laura Zito
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Valentina Gambacorta
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Unit of Senescence in Stem Cell Aging, Differentiation and Cancer, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Michela Riba
- Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Giacomo Oliveira
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Dana-Farber Cancer Institute, Boston, MA, USA
| | - Gabriele Bucci
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Matteo Barcella
- Genomic and Bioinformatics Unit, Department of Health Sciences, University of Milano, Milano, Italy
| | - Orietta Spinelli
- Hematology and Bone Marrow Transplant Unit, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Raffaella Greco
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Lara Crucitti
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy.,University of Milano, Milano, Italy
| | - Nicoletta Cieri
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy.,University of Milano, Milano, Italy
| | - Maddalena Noviello
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Francesco Manfredi
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Elisa Montaldo
- Genomics of the Innate Immune System Unit, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Renato Ostuni
- Genomics of the Innate Immune System Unit, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Matteo M Naldini
- Translational Stem Cell and Leukemia Unit, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Bernhard Gentner
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Translational Stem Cell and Leukemia Unit, San Raffaele Telethon Institute for Gene Therapy, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Miguel Waterhouse
- Department of Hematology, Oncology and Stem Cell Transplantation, Universitätsklinikum Freiburg, Freiburg, Germany
| | - Robert Zeiser
- Department of Hematology, Oncology and Stem Cell Transplantation, Universitätsklinikum Freiburg, Freiburg, Germany
| | - Jurgen Finke
- Department of Hematology, Oncology and Stem Cell Transplantation, Universitätsklinikum Freiburg, Freiburg, Germany
| | - Maher Hanoun
- Department of Bone Marrow Transplantation, Universitätsklinikum Essen, Essen, Germany
| | - Dietrich W Beelen
- Department of Bone Marrow Transplantation, Universitätsklinikum Essen, Essen, Germany
| | - Ivana Gojo
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Leo Luznik
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Masahiro Onozawa
- Department of Hematology, Hokkaido University Faculty of Medicine, Graduate School of Medicine, Sapporo, Japan
| | - Takanori Teshima
- Department of Hematology, Hokkaido University Faculty of Medicine, Graduate School of Medicine, Sapporo, Japan
| | - Raynier Devillier
- Department of Haematology, Institut Paoli Calmettes, Marseille, France
| | - Didier Blaise
- Department of Haematology, Institut Paoli Calmettes, Marseille, France
| | | | - Marieke Griffioen
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Matteo G Carrabba
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Massimo Bernardi
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Jacopo Peccatori
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Cristina Barlassina
- Genomic and Bioinformatics Unit, Department of Health Sciences, University of Milano, Milano, Italy
| | - Elia Stupka
- Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dejan Lazarevic
- Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Giovanni Tonon
- Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Alessandro Rambaldi
- Hematology and Bone Marrow Transplant Unit, ASST Papa Giovanni XXIII, Bergamo, Italy.,Department of Oncology and Hemato-Oncology, University of Milano, Milano, Italy
| | - Davide Cittaro
- Center for Translational Genomics and Bioinformatics, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Chiara Bonini
- Experimental Hematology Unit, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,San Raffaele Vita-Salute University, Milano, Italy
| | - Katharina Fleischhauer
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy.,Institute for Experimental Cellular Therapy, Universitätsklinikum Essen, Essen, Germany
| | - Fabio Ciceri
- Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy.,San Raffaele Vita-Salute University, Milano, Italy
| | - Luca Vago
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology, Division of Immunology, Transplantation and Infectious Disease, IRCCS San Raffaele Scientific Institute, Milano, Italy. .,Unit of Hematology and Bone Marrow Transplantation, IRCCS San Raffaele Scientific Institute, Milano, Italy.
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16
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Mechanisms of immune escape after allogeneic hematopoietic cell transplantation. Blood 2018; 133:1290-1297. [PMID: 30578254 DOI: 10.1182/blood-2018-10-846824] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 12/15/2018] [Indexed: 02/04/2023] Open
Abstract
Relapse of the original disease is a major cause of death after allogeneic hematopoietic cell transplantation for acute leukemias. There is growing evidence that relapses may be explained not only by resistance to chemotherapy but also by the escape of tumor cells from the control of the allogeneic immune response. Mechanisms of immune evasion can involve abrogation of leukemia cell recognition due to loss of HLA genes, immunosuppression by immune-checkpoint ligand expression, production of anti-inflammatory factors, release of metabolically active enzymes, loss of proinflammatory cytokine production, and acquisition of novel driver mutations that promote leukemia outgrowth. These mechanisms, and therapeutic targeting of immune escape, will be discussed. We divide the evidence in support of immune-escape mechanisms into animal studies, human laboratory studies, and human clinical experience. A better understanding of the molecular pathways connected to immune escape and relapse may help to improve our therapeutic armamentarium against acute myeloid leukemia relapse.
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