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Napoli C, Benincasa G, Fiorelli A, Strozziero MG, Costa D, Russo F, Grimaldi V, Hoetzenecker K. Lung transplantation: Current insights and outcomes. Transpl Immunol 2024; 85:102073. [PMID: 38889844 DOI: 10.1016/j.trim.2024.102073] [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: 11/16/2023] [Revised: 06/10/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Until now, the ability to predict or retard immune-mediated rejection events after lung transplantation is still limited due to the lack of specific biomarkers. The pressing need remains to early diagnose or predict the onset of chronic lung allograft dysfunction (CLAD) and its differential phenotypes that is the leading cause of death. Omics technologies (mainly genomics, epigenomics, and transcriptomics) combined with advanced bioinformatic platforms are clarifying the key immune-related molecular routes that trigger early and late events of lung allograft rejection supporting the biomarker discovery. The most promising biomarkers came from genomics. Both unregistered and NIH-registered clinical trials demonstrated that the increased percentage of donor-derived cell-free DNA in both plasma and bronchoalveolar lavage fluid showed a good diagnostic performance for clinically silent acute rejection events and CLAD differential phenotypes. A further success arose from transcriptomics that led to development of Molecular Microscope® Diagnostic System (MMDx) to interpret the relationship between molecular signatures of lung biopsies and rejection events. Other immune-related biomarkers of rejection events may be exosomes, telomer length, DNA methylation, and histone-mediated neutrophil extracellular traps (NETs) but none of them entered in registered clinical trials. Here, we discuss novel and existing technologies for revealing new immune-mediated mechanisms underlying acute and chronic rejection events, with a particular focus on emerging biomarkers for improving precision medicine of lung transplantation field.
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Affiliation(s)
- Claudio Napoli
- Department of Advanced Medical and Surgical Sciences (DAMSS), University of Campania "Luigi Vanvitelli", 80138 Naples, Italy; U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Clinical Department of Internal Medicine and Specialistics, University of Campania "L. Vanvitelli,", Naples, Italy
| | - Giuditta Benincasa
- Department of Advanced Medical and Surgical Sciences (DAMSS), University of Campania "Luigi Vanvitelli", 80138 Naples, Italy.
| | - Alfonso Fiorelli
- Thoracic Surgery Unit, Department of Translation Medicine, University of Campania "L. Vanvitelli", Naples, Italy
| | | | - Dario Costa
- U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Clinical Department of Internal Medicine and Specialistics, University of Campania "L. Vanvitelli,", Naples, Italy
| | | | - Vincenzo Grimaldi
- U.O.C. Division of Clinical Immunology, Immunohematology, Transfusion Medicine and Transplant Immunology, Clinical Department of Internal Medicine and Specialistics, University of Campania "L. Vanvitelli,", Naples, Italy
| | - Konrad Hoetzenecker
- Department of Thoracic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
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2
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Pedini P, Hubert L, Carlini F, Baudey JB, Tous A, Jordier F, Basire A, Bagnis C, Reynaud-Gaubert M, Coiffard B, Chiaroni J, Silvy M, Picard C. Low Prevalence of HLA-G Antibodies in Lung Transplant Patients Detected using MAIPA-Adapted Protocol. Int J Mol Sci 2023; 24:16479. [PMID: 38003669 PMCID: PMC10671704 DOI: 10.3390/ijms242216479] [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: 08/30/2023] [Revised: 11/12/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023] Open
Abstract
Lung transplantation is often complicated by acute and/or chronic rejection leading to graft-function loss. In addition to the HLA donor-specific antibodies (HLA-DSA), a few autoantibodies are correlated with the occurrence of these complications. Recently, antibodies directed against non-classical HLA molecules, HLA-G, -E, and -F have been detected in autoimmune diseases, like systemic lupus erythematosus. Non-classical HLA molecules are crucial in the immunological acceptance of the lung graft, and some of their isoforms, like HLA-G*01:04 and -G*01:06, are associated with a negative clinical outcome. The aim of this study is to determine the frequency of detection of HLA-G antibodies in lung transplant recipients (LTRs) and their impact on the occurrence of clinical complications. After incubating the cell lines SPI-801, with and without three different HLA-G isoform expression, with sera from 90 healthy blood donors and 35 LTRs (before and after transplantation), HLA-G reactivity was revealed using reagents from commercial monoclonal antibody immobilization of platelet antigen assay (MAIPA ApDIA®). Only one serum from one blood donor had specific reactivity against the HLA-G transduced lines. Non-specific reactivity in many sera from LTRs was observed with transduced- and wild-type cell lines, which may suggest recognition of an autoantigen expressed by the SPI-801 cell line. In conclusion, this study allowed the development of a specific detection tool for non-denatured HLA-G antibodies. These antibodies seem uncommon, both in healthy subjects and in complicated LTRs. This study should be extended to patients suffering from autoimmune diseases as well as kidney and heart transplant recipients.
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Affiliation(s)
- Pascal Pedini
- Immunogenetics Laboratory, Etablissement Français du Sang, 13005 Marseille, France (C.P.)
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | - Lucas Hubert
- Immunogenetics Laboratory, Etablissement Français du Sang, 13005 Marseille, France (C.P.)
| | | | - Jean Baptiste Baudey
- Immunogenetics Laboratory, Etablissement Français du Sang, 13005 Marseille, France (C.P.)
| | - Audrey Tous
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | - Francois Jordier
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | - Agnès Basire
- Immunogenetics Laboratory, Etablissement Français du Sang, 13005 Marseille, France (C.P.)
| | - Claude Bagnis
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | | | - Benjamin Coiffard
- Lung Transplant Department, Aix-Marseille University, APHM, 13015 Marseille, France
| | - Jacques Chiaroni
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | - Monique Silvy
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
| | - Christophe Picard
- Immunogenetics Laboratory, Etablissement Français du Sang, 13005 Marseille, France (C.P.)
- ADES UMR 7268, Aix Marseille University, 13005 Marseille, France; (A.T.)
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3
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Cross-Najafi AA, Farag K, Isidan A, Li W, Zhang W, Lin Z, Walsh JR, Lopez K, Park Y, Higgins NG, Cooper DK, Ekser B, Li P. Co-expression of HLA-E and HLA-G on genetically modified porcine endothelial cells attenuates human NK cell-mediated degranulation. Front Immunol 2023; 14:1217809. [PMID: 37529053 PMCID: PMC10387534 DOI: 10.3389/fimmu.2023.1217809] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/30/2023] [Indexed: 08/03/2023] Open
Abstract
Natural killer (NK) cells play an important role in immune rejection in solid organ transplantation. To mitigate human NK cell activation in xenotransplantation, introducing inhibitory ligands on xenografts via genetic engineering of pigs may protect the graft from human NK cell-mediated cytotoxicity and ultimately improve xenograft survival. In this study, non-classical HLA class I molecules HLA-E and HLA-G were introduced in an immortalized porcine liver endothelial cell line with disruption of five genes (GGTA1, CMAH, β4galNT2, SLA-I α chain, and β-2 microglobulin) encoding three major carbohydrate xenoantigens (αGal, Neu5Gc, and Sda) and swine leukocyte antigen class I (SLA-I) molecules. Expression of HLA-E and/or HLA-G on pig cells were confirmed by flow cytometry. Endogenous HLA-G molecules as well as exogenous HLA-G VL9 peptide could dramatically enhance HLA-E expression on transfected pig cells. We found that co-expression of HLA-E and HLA-G on porcine cells led to a significant reduction in human NK cell activation compared to the cells expressing HLA-E or HLA-G alone and the parental cell line. NK cell activation was assessed by analysis of CD107a expression in CD3-CD56+ population gated from human peripheral blood mononuclear cells. CD107a is a sensitive marker of NK cell activation and correlates with NK cell degranulation and cytotoxicity. HLA-E and/or HLA-G on pig cells did not show reactivity to human sera IgG and IgM antibodies. This in vitro study demonstrated that co-expression of HLA-E and HLA-G on genetically modified porcine endothelial cells provided a superior inhibition in human xenoreactive NK cells, which may guide further genetic engineering of pigs to prevent human NK cell mediated rejection.
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Affiliation(s)
- Arthur A. Cross-Najafi
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kristine Farag
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Abdulkadir Isidan
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Wei Li
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Wenjun Zhang
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Zhansong Lin
- Ragon Institute of Massachusetts General Hospital (MGH), Massachusetts Institute of Technology (MIT), and Harvard, Cambridge, MA, United States
| | - Julia R. Walsh
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kevin Lopez
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Yujin Park
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Nancy G. Higgins
- Transplant Immunology, Indiana University Health, Indianapolis, IN, United States
| | - David K.C. Cooper
- Center for Transplantation Sciences, Massachusetts General Hospital/Harvard Medical School, Cambridge, MA, United States
| | - Burcin Ekser
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Ping Li
- Transplant Division, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
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Le Floc’h B, Costet N, Vu N, Bernabeu-Gentey P, Pronier C, Houssel-Debry P, Boudjéma K, Renac V, Samson M, Amiot L. Involvement of circulating soluble HLA-G after liver transplantation in the low immunogenicity of hepatic allograft. PLoS One 2023; 18:e0282736. [PMID: 36897848 PMCID: PMC10004504 DOI: 10.1371/journal.pone.0282736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023] Open
Abstract
Graft rejection is a critical risk in solid-organ transplantation. To decrease such risk, an understanding of the factors involved in low immunogenicity of liver allografts could potentially make it possible to transfer this tolerogenic property to other transplanted organs. HLA-G, a natural physiological molecule belonging to the Human Leukocyte Antigen class (HLA) Ib family that induces tolerance, is associated with fewer rejections in solid-organ transplantation. In contrast to HLA-G, HLA antigen incompatibilities between donor and recipient can lead to rejection, except in liver transplantation. We compared HLA-G plasma levels and the presence of anti-HLA antibodies before and after LT to understand the low immunogenicity of the liver. We conducted a large prospective study that included 118 patients on HLA-G plasma levels during a 12-month follow-up and compared them to the status of anti-HLA antibodies. HLA-G plasma levels were evaluated by ELISA at seven defined pre- and post-LT time points. HLA-G plasma levels were stable over time pre-LT and were not associated with patient characteristics. The level increased until the third month post-LT, before decreasing to a level comparable to that of the pre-LT period at one year of follow-up. Such evolution was independent of biological markers and immunosuppressive treatment, except with glucocorticoids. An HLA-G plasma level ≤ 50 ng/ml on day 8 after LT was significantly associated with a higher rejection risk. We also observed a higher percentage of rejection in the presence of donor specific anti-HLA antibodies (DSA) and an association between the increase in HLA-G plasma levels at three months and the absence of DSA. The low immunogenicity of liver allografts could be related to early elevated levels of HLA-G, which lead, in turn, to a decrease in anti-HLA antibodies, opening potential new therapeutic strategies using synthetic HLA-G proteins.
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Affiliation(s)
- Bastien Le Floc’h
- Service de Chirurgie Digestive, Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, CHU Rennes, Univ Rennes, Rennes, France
| | - Nathalie Costet
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, Univ Rennes, Rennes, France
| | - Nicolas Vu
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, Univ Rennes, Rennes, France
| | - Pénélope Bernabeu-Gentey
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, Univ Rennes, Rennes, France
| | - Charlotte Pronier
- Pôle de Biologie, Service de Virologie Générale et Rétrovirologie, Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, CHU Rennes, Univ Rennes, Rennes, France
| | - Pauline Houssel-Debry
- Service des Maladies du Foie (SMF), Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, CHU Rennes, Univ Rennes, Rennes, France
| | - Karim Boudjéma
- Service de Chirurgie Digestive, Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, CHU Rennes, Univ Rennes, Rennes, France
| | - Virginie Renac
- EFS Rennes, Laboratoire Histocompatibilité-Immunogénétique / Immunologie Leuco-plaquettaire (HLA/HPA), Rennes, France
| | - Michel Samson
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) - UMR_S 1085, Univ Rennes, Rennes, France
| | - Laurence Amiot
- Pôle de Biologie, Laboratoire de Cytologie-Cytometrie en flux Inserm, EHESP, IRSET (Institut de Recherche en santé, Environnement et Travail) - UMR_S 1085, CHU Rennes, Univ Rennes, Rennes, France
- * E-mail:
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5
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Fiouane S, Chebbo M, Beley S, Paganini J, Picard C, D'Journo X, Thomas P, Chiaroni J, Chanez P, Gras D, Di Cristofaro J. Mobilisation of HLA-F on the surface of bronchial epithelial cells and platelets in asthmatic patients. HLA 2022; 100:491-499. [PMID: 35988034 PMCID: PMC9804204 DOI: 10.1111/tan.14782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 07/26/2022] [Accepted: 08/16/2022] [Indexed: 01/05/2023]
Abstract
Uncontrolled inflammation of the airways in chronic obstructive lung diseases leads to exacerbation, accelerated lung dysfunction and respiratory insufficiency. Among these diseases, asthma affects 358 million people worldwide. Human bronchial epithelium cells (HBEC) express both anti-inflammatory and activating molecules, and their deregulated expression contribute to immune cell recruitment and activation, especially platelets (PLT) particularly involved in lung tissue inflammation in asthma context. Previous results supported that HLA-G dysregulation in lung tissue is associated with immune cell activation. We investigated here HLA-F expression, reported to be mobilised on immune cell surface upon activation and displaying its highest affinity for the KIR3DS1-activating NK receptor. We explored HLA-F transcriptional expression in HBEC; HLA-F total expression in PBMC and HBEC collected from healthy individuals at rest and upon chemical activation and HLA-F membrane expression in PBMC, HBEC and PLT collected from healthy individuals at rest and upon chemical activation. We compared HLA-F transcriptional expression in HBEC from healthy individuals and asthmatic patients and its surface expression in HBEC and PLT from healthy individuals and asthmatic patients. Our results support that HLA-F is expressed by HBEC and PLT under healthy physiological conditions and is retained in cytoplasm, barely expressed on the surface, as previously reported in immune cells. In both cell types, HLA-F reaches the surface in the inflammatory asthma context whereas no effect is observed at the transcriptional level. Our study suggests that HLA-F surface expression is a ubiquitous post-transcriptional process in activated cells. It may be of therapeutic interest in controlling lung inflammation.
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Affiliation(s)
- Sabrina Fiouane
- CNRS, EFS, ADES, UMR7268Aix Marseille UniversityMarseilleFrance,Etablissement Français du Sang PACA CorseMarseilleFrance
| | - Mohamad Chebbo
- INSERM 1263, INRAE 1260, C2VNAix Marseille UniversityMarseilleFrance
| | - Sophie Beley
- CNRS, EFS, ADES, UMR7268Aix Marseille UniversityMarseilleFrance,Etablissement Français du Sang PACA CorseMarseilleFrance
| | | | - Christophe Picard
- CNRS, EFS, ADES, UMR7268Aix Marseille UniversityMarseilleFrance,Etablissement Français du Sang PACA CorseMarseilleFrance
| | - Xavier‐Benoît D'Journo
- Department of Thoracic Surgery, North HospitalAix‐Marseille University and Assistance Publique‐Hôpitaux de MarseilleMarseilleFrance
| | - Pascal‐Alexandre Thomas
- Department of Thoracic Surgery, North HospitalAix‐Marseille University and Assistance Publique‐Hôpitaux de MarseilleMarseilleFrance
| | - Jacques Chiaroni
- CNRS, EFS, ADES, UMR7268Aix Marseille UniversityMarseilleFrance,Etablissement Français du Sang PACA CorseMarseilleFrance
| | - Pascal Chanez
- INSERM 1263, INRAE 1260, C2VNAix Marseille UniversityMarseilleFrance,Clinique des Bronches, Allergies et SommeilNorth Hospital, Assistance Publique‐Hôpitaux de MarseilleMarseilleFrance
| | - Delphine Gras
- INSERM 1263, INRAE 1260, C2VNAix Marseille UniversityMarseilleFrance
| | - Julie Di Cristofaro
- CNRS, EFS, ADES, UMR7268Aix Marseille UniversityMarseilleFrance,Etablissement Français du Sang PACA CorseMarseilleFrance
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6
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Liu S, Bos NA, Verschuuren EAM, van Baarle D, Westra J. Biological Characteristics of HLA-G and Its Role in Solid Organ Transplantation. Front Immunol 2022; 13:902093. [PMID: 35769475 PMCID: PMC9234285 DOI: 10.3389/fimmu.2022.902093] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 05/19/2022] [Indexed: 11/18/2022] Open
Abstract
Organ transplantation is a lifesaving option for patients with advanced diseases. Rejection is regarded as one of the most severe risk factors post-transplantation. A molecule that contributes to immune tolerance and resisting rejection is human leukocyte antigen (HLA)-G, which belongs to the non-classical major histocompatibility complex class (MHC) I family. HLA-G was originally found to play a role during pregnancy to maintain immune tolerance between mother and child. It is expressed in the placenta and detected in several body fluids as soluble factor as well as different membrane isoforms on cells. Recent findings on HLA-G show that it can also play multifaceted roles during transplantation. This review will explain the general characteristics and biological function of HLA-G and summarize the views supporting the tolerogenic and other roles of HLA-G to better understand its role in solid organ transplantation (SOT) and its complications. Finally, we will discuss potential future research on the role of HLA-G in prevention, diagnosis, and treatment in SOT.
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Affiliation(s)
- Siqi Liu
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Nicolaas A. Bos
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Erik A. M. Verschuuren
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Debbie van Baarle
- Department of Medical Microbiology and Infection Prevention, University Medical Center Groningen, Groningen, Netherlands
| | - Johanna Westra
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- *Correspondence: Johanna Westra,
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Wang P, Greenland JR. HLA-G/ILT2 signaling on the path to tolerance. J Heart Lung Transplant 2022; 41:852-853. [PMID: 35382979 PMCID: PMC10842902 DOI: 10.1016/j.healun.2022.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/05/2022] [Accepted: 03/08/2022] [Indexed: 02/05/2023] Open
Affiliation(s)
- Ping Wang
- Department of Medicine, University of California, San Francisco, California
| | - John R Greenland
- Department of Medicine, University of California, San Francisco, California; Medical Service, San Francisco VA Health Care System, San Francisco, California.
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8
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Silva TD, Voisey J, Hopkins P, Apte S, Chambers D, O'Sullivan B. Markers of rejection of a lung allograft: state of the art. Biomark Med 2022; 16:483-498. [PMID: 35315284 DOI: 10.2217/bmm-2021-1013] [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: 11/21/2022] Open
Abstract
Chronic lung allograft dysfunction (CLAD) affects approximately 50% of all lung transplant recipients by 5 post-operative years and is the leading cause of death in lung transplant recipients. Early CLAD diagnosis or ideally prediction of CLAD is essential to enable early intervention before significant lung injury occurs. New technologies have emerged to facilitate biomarker discovery, including epigenetic modification and single-cell RNA sequencing. This review examines new and existing technologies for biomarker discovery and the current state of research on biomarkers for identifying lung transplant rejection.
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Affiliation(s)
- Tharushi de Silva
- School of Biomedical Sciences, Centre for Genomics & Personalised Heath, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.,Queensland Lung Transplant Service, Ground Floor, Clinical Sciences Building, The Prince Charles Hospital, Rode Road, Chermside, 4032, Brisbane, Queensland, Australia
| | - Joanne Voisey
- School of Biomedical Sciences, Centre for Genomics & Personalised Heath, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Peter Hopkins
- Queensland Lung Transplant Service, Ground Floor, Clinical Sciences Building, The Prince Charles Hospital, Rode Road, Chermside, 4032, Brisbane, Queensland, Australia.,Prince Charles Hospital Northside Clinical Unit, Faculty of Medicine, The University of Queensland, 4032, Brisbane, Queensland, Australia
| | - Simon Apte
- Queensland Lung Transplant Service, Ground Floor, Clinical Sciences Building, The Prince Charles Hospital, Rode Road, Chermside, 4032, Brisbane, Queensland, Australia.,Prince Charles Hospital Northside Clinical Unit, Faculty of Medicine, The University of Queensland, 4032, Brisbane, Queensland, Australia
| | - Daniel Chambers
- School of Biomedical Sciences, Centre for Genomics & Personalised Heath, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.,Queensland Lung Transplant Service, Ground Floor, Clinical Sciences Building, The Prince Charles Hospital, Rode Road, Chermside, 4032, Brisbane, Queensland, Australia.,Prince Charles Hospital Northside Clinical Unit, Faculty of Medicine, The University of Queensland, 4032, Brisbane, Queensland, Australia
| | - Brendan O'Sullivan
- School of Biomedical Sciences, Centre for Genomics & Personalised Heath, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.,Queensland Lung Transplant Service, Ground Floor, Clinical Sciences Building, The Prince Charles Hospital, Rode Road, Chermside, 4032, Brisbane, Queensland, Australia.,Prince Charles Hospital Northside Clinical Unit, Faculty of Medicine, The University of Queensland, 4032, Brisbane, Queensland, Australia
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9
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Cansever M, Göktaş MA, Arslan D, Patiroğlu T. Serum levels of soluble HLA-G correlate with disease activity in pediatric patients with Crohn's disease. Saudi J Gastroenterol 2022; 28:233-238. [PMID: 35042317 PMCID: PMC9212116 DOI: 10.4103/sjg.sjg_327_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Human leukocyte antigen (HLA)-G, a member of the HLA family, is crucial for fetomaternal tolerance. Transmembrane or circulating/soluble HLA-G (sHLA-G) is elevated in autoimmune conditions and the tumor microenvironment. Circulating sHLA-G levels and their association with disease activity have not yet been assessed in pediatric patients with inflammatory bowel disease (IBD). This study aimed to quantify the serum sHLA-G levels of pediatric patients with IBD and assess the association of serum sHLA-G with disease activity. METHODS : We enrolled 24 pediatric IBD patients Crohn's disease (CD) and ulcerative colitis (UC), n = 12 each] and 24 healthy controls. Based on the disease activity index, five and seven of the CD patients had mild and moderate/severe disease, respectively, whereas six of the UC patients were in remission and six had mild disease. Serum was collected and sHLA-G levels were determined by enzyme-linked immunosorbent assay (ELISA). RESULTS : Pediatric patients with CD had significantly higher sHLA-G levels compared with patients with UC and healthy controls. Notably, serum sHLA-G levels were significantly higher in patients with moderate/severe CD than in those with mild CD. CONCLUSIONS : Serum sHLA-G levels correlate with disease activity in pediatric patients with CD and are higher in CD patients than in UC patients. Thus, sHLA-G is a potential biomarker for disease activity in CD.
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Affiliation(s)
- Murat Cansever
- Department of Pediatrics, Division of Immunology, School of Medicine, Erciyes University, Kayseri, Turkey,Address for correspondence: Dr. Murat Cansever, Department of Pediatrics, Division of Immunology, Faculty of Medicine, Erciyes University, 38034, Kayseri, Turkey. E-mail:
| | - Mehmet Akif Göktaş
- Department of Pediatrics, Division of Gastroenterology, School of Medicine, Hacettepe University, Kayseri, Turkey
| | - Duran Arslan
- Department of Pediatrics, Division of Gastroenterology, School of Medicine, Erciyes University, Kayseri, Turkey
| | - Türkan Patiroğlu
- Department of Pediatrics, Division of Immunology, School of Medicine, Erciyes University, Kayseri, Turkey
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10
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Olivier B, Domitille M, Julie T, Alexandre V, Isabelle K, Sandrine H, Benjamin RP, Martine RG, Ana N, Vincent B, Jonathan M, Xavier D, Julie M, Jérôme LP, Gaëlle D, Christel SR, Loic F, Antoine M, Clément P, Antoine R, Edgardo C, Joel LM, Nathalie RF, the COLT Consortium. Chronic lung allograft dysfunction is associated with an early increase of circulating cytotoxic CD4+CD57+ILT2+ T cells, selectively inhibited by the immune check-point HLA-G. J Heart Lung Transplant 2022; 41:626-640. [DOI: 10.1016/j.healun.2022.01.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 12/10/2021] [Accepted: 01/14/2022] [Indexed: 01/01/2023] Open
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Mouchet N, Vu N, Turlin B, Rioux-Leclercq N, Jouneau S, Samson M, Amiot L. HLA-G Is Widely Expressed by Mast Cells in Regions of Organ Fibrosis in the Liver, Lung and Kidney. Int J Mol Sci 2021; 22:ijms222212490. [PMID: 34830373 PMCID: PMC8618089 DOI: 10.3390/ijms222212490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/18/2021] [Accepted: 11/03/2021] [Indexed: 01/14/2023] Open
Abstract
We previously demonstrated that mast cells expressing HLA-G are associated with regions of hepatitis C virus-induced liver fibrosis. Here, we aimed to determine whether HLA-G expression in mast cells is specific to viral etiology, the liver, or to the general process of fibrosis. We enumerated HLA-G+ cells and mast cells by the immunohistochemistry of (i) liver blocks from 41 cases of alcoholic cirrhosis, (ii) 10 of idiopathic pulmonary fibrosis (IPF), and (iii) 10 of renal fibrosis. The nature of the HLA-G+ cells was specified by multiplex immunofluorescence using software. More than half of all HLA-G+ cells were mast cells in fibrotic areas of alcoholic cirrhosis and IPF. In the kidneys, subjected to fibrosis, the HLA-G+ cells were indeed mast cells but could not be counted. Moreover, in certain cases of the liver and lung, we observed a number of cellular nodes, which were secondary or tertiary follicles, in which HLA-G was highly expressed by B lymphocytes. In conclusion, HLA-G+ mast cells could be observed in the fibrotic regions of all organs studied. Previous studies suggest a protective role for HLA-G+ mast cells against inflammation and fibrosis. The observed follicles with B lymphocytes that express HLA-G may also reinforce their antifibrotic role.
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Affiliation(s)
- Nicolas Mouchet
- Univ Rennes, INSERM, CNRS, Biosit, Core Facility H2P2, F-35000 Rennes, France;
- France BioImaging, Biogenouest, IBISA, F-35000 Rennes, France
| | - Nicolas Vu
- Univ Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, F-35000 Rennes, France; (N.V.); (M.S.)
| | - Bruno Turlin
- Univ Rennes, CHU Rennes, F-35000 Rennes, France;
| | - Nathalie Rioux-Leclercq
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, F-35000 Rennes, France; (N.R.-L.); (S.J.)
| | - Stéphane Jouneau
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, F-35000 Rennes, France; (N.R.-L.); (S.J.)
| | - Michel Samson
- Univ Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, F-35000 Rennes, France; (N.V.); (M.S.)
| | - Laurence Amiot
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, F-35000 Rennes, France; (N.R.-L.); (S.J.)
- Correspondence: ; Tel.: +(330)-223-23-48-62
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Kumano S, Okushi Y, Fujimoto K, Adachi H, Furuichi K, Yokoyama H. Role and expression of non-classical human leukocyte antigen-G in renal transplanted allografts. Clin Exp Nephrol 2021; 25:428-438. [PMID: 33398603 DOI: 10.1007/s10157-020-01999-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/19/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND The non-classical class I molecule human leukocyte antigen-G (HLA-G) has great potential to modulate the immune response. However, the mechanism underlying HLA-G induction remains unknown. Therefore, this study aimed to determine the factors that induce HLA-G expression on proximal tubular epithelial cells (pTECs) in renal transplanted allografts in vivo and in vitro. METHODS This study included 40 adult Japanese patients with renal allografts (35 and five patients with kidneys from living and deceased donors, respectively) who survived for at least 1 year. We evaluated HLA-G1/5 expression using an immunofluorescence method and investigated the induction of HLA-G expression in primary cultured human pTECs by cytokines and immunosuppressants. RESULTS The HLA-G expression was identified in the perinuclear region or on the basement membrane of pTECs of renal biopsy tissue in 12 (30%) of 40 patients at 2-4 weeks and at 1 year following transplantation. A reduction of 30% in the estimated glomerular filtration rate was lower in the HLA-G-positive group than that of the negative group (p = 0.016). Cox proportional hazard models also demonstrated that HLA-G1/5 expression on pTECs was an independent predictor of improved renal allograft function (hazard ratio, 0.189; 95% CI 0.041-0.850, p = 0.030). Interferon-beta was the most powerful inducer of HLA-G expression in vitro, whereas the immunosuppressants everolimus, tacrolimus, cyclosporin, and dexamethasone did not induce any expression. CONCLUSION Unlike immunosuppressants, acquired HLA-G expression might confer long-term renal preservation effects in renal transplanted allografts.
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Affiliation(s)
- Sho Kumano
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan.
| | - Yuki Okushi
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Keiji Fujimoto
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiroki Adachi
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Kengo Furuichi
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Hitoshi Yokoyama
- Department of Nephrology, Kanazawa Medical University School of Medicine, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan.
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Expression of membrane-bound human leucocyte antigen-G in systemic sclerosis and systemic lupus erythematosus. Hum Immunol 2019; 81:162-167. [PMID: 31848026 DOI: 10.1016/j.humimm.2019.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/20/2022]
Abstract
Human leucocyte antigen-G (HLA-G) is a nonclassical class I major histocompatibility complex (MHC) molecule characterized by complex immunoregulatory and tolerogenic functions. Membrane-bound HLA-G is expressed on the surface of different cell populations in both physiological and pathological conditions. Systemic sclerosis (SSc) is a multisystem autoimmune disease characterized by widespread tissue fibrosis, vascular lesions and immunological alterations. Systemic lupus erythematosus is the prototypic systemic autoimmune disease affecting virtually any organ system, such as skin, joints, central nervous system, or kidneys. In SSc and SLE patients, the membrane expression of HLA-G on monocytes (0.88 ± 1.54 and 0.43 ± 0.75, respectively), CD4+ (0.42 ± 0.78 and 0.63 ± 0.48, respectively), CD8+ (2.65 ± 3.47 and 1.29 ± 1.34, respectively) and CD4+ CD8+ double-positive cells (13.87 ± 15.97 and 3.79 ± 3.11, respectively) was significantly higher than in healthy controls (0.12 ± 0.07; 0.01 ± 0.01; 0.14 ± 0.20 and 0.32 ± 0.38, respectively) (p < 0.0001). Our results show that in SSc and SLE the membrane expression of HLA-G by different subpopulations of peripheral blood mononuclear cells (PBMC) is increased, suggesting a potential role of HLA-G molecules in the complex immunological pathogenesis of these two autoimmune disorders.
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Toni Ho GG, Heinen F, Stieglitz F, Blasczyk R, Bade-Döding C. Dynamic Interaction between Immune Escape Mechanism and HLA-Ib Regulation. Immunogenetics 2019. [DOI: 10.5772/intechopen.80731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Lazarte J, Ma J, Martinu T, Levy L, Klement W, White M, Pelling J, Guan Z, Azad S, Tikkanen J, Rao V, Tomlinson G, Delgado D, Keshavjee S, Juvet SC. Donor human leukocyte antigen-G single nucleotide polymorphisms are associated with post-lung transplant mortality. Eur Respir J 2019; 54:13993003.02126-2018. [DOI: 10.1183/13993003.02126-2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 05/12/2019] [Indexed: 01/10/2023]
Abstract
Human leukocyte antigen (HLA)-G is a non-classical HLA that inhibits immune responses. Its expression is modified by single nucleotide polymorphisms (SNPs), which are associated with transplant outcomes. Our aim was to investigate the association of donor and recipient HLA-G SNPs with chronic lung allograft dysfunction (CLAD) and mortality after lung transplantation.In this single-centre study, we examined 11 HLA-G SNPs in 345 consecutive recipients and 297 donors of a first bilateral lung transplant. A multivariable Cox proportional hazards model assessed associations of SNPs with death and CLAD. Transbronchial biopsies (TBBx) and bronchoalveolar lavage (BAL) samples were examined using quantitative PCR, ELISA and immunofluorescence.Over a median of 4.75 years, 142 patients (41%) developed CLAD; 170 (49%) died. Multivariable analysis revealed donor SNP +3142 (GG+CG versus CC) was associated with increased mortality (hazard ratio 1.78, 95% CI 1.12–2.84; p=0.015). In contrast, five donor SNPs, -201(CC), -716(TT), -56(CC), G*01:03(AA) and 14 bp INDEL, conferred reduced mortality risk. Specific donor–recipient SNP pairings reduced CLAD risk. Predominantly epithelial HLA-G expression was observed on TBBx without rejection. Soluble HLA-G was present in higher concentrations in the BAL samples of patients who later developed CLAD.Specific donor SNPs were associated with mortality risk after lung transplantation, while certain donor–recipient SNP pairings modulated CLAD risk. TBBx demonstrated predominantly epithelial, and therefore presumably donor-derived, HLA-G expression in keeping with these observations. This study is the first to demonstrate an effect of donor HLA-G SNPs on lung transplantation outcome.
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The association of HLA-G polymorphisms and the synergistic effect of sMICA and sHLA-G with chronic kidney disease and allograft acceptance. PLoS One 2019; 14:e0212750. [PMID: 30794652 PMCID: PMC6386361 DOI: 10.1371/journal.pone.0212750] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 02/10/2019] [Indexed: 11/19/2022] Open
Abstract
The HLA-G and MICA genes are stimulated under inflammatory conditions and code for soluble (sMICA and sHLA-G) or membrane-bound molecules that exhibit immunomodulatory properties. It is still unclear whether they would have a synergistic or antagonistic effect on the immunomodulation of the inflammatory response, such as in chronic kidney disease (CKD), contributing to a better prognosis after the kidney transplantation. In this study, we went from genetic to plasma analysis, first evaluating the polymorphism of MICA, NKG2D and HLA-G in a cohort from Southern Brazil, subdivided in a control group of individuals (n = 75), patients with CKD (n = 94), and kidney-transplant (KT) patients (n = 64). MICA, NKG2D and HLA-G genotyping was performed by polymerase chain reaction with specific oligonucleotide probes, Taqman and Sanger sequencing, respectively. Levels of soluble forms of MICA and HLA-G were measured in plasma with ELISA. Case-control analysis showed that the individuals with haplotype HLA-G*01:01/UTR-4 have a lower susceptibility to develop chronic kidney disease (OR = 0.480; p = 0.032). Concerning the group of kidney-transplant patients, the HLA-G genotypes +3010 GC (rs1710) and +3142 GC (rs1063320) were associated with higher risk for allograft rejection (OR = 5.357; p = 0.013 and OR = 5.357, p = 0.013, respectively). Nevertheless, the genotype +3010 GG (OR = 0.136; p = 0.041) was associated with kidney allograft acceptance, suggesting that it is a protection factor for rejection. In addition, the phenotypic analysis revealed higher levels of sHLA-G (p = 0.003) and sMICA (p < 0.001) in plasma were associated with the development of CKD. For patients who were already under chronic pathological stress and underwent a kidney transplant, a high sMICA (p = 0.001) in pre-transplant proved to favor immunomodulation and allograft acceptance. Even so, the association of genetic factors with differential levels of soluble molecules were not evidenced, we displayed a synergistic effect of sMICA and sHLA-G in response to inflammation. This increase was observed in CKD patients, that when undergo transplantation, had this previous amount of immunoregulatory molecules as a positive factor for the allograft acceptance.
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17
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Rezaei F, Zareei N, Razmi N, Nikeghbalian S, Azarpira N. Genetic Polymorphism of HLA-G 14-bp Insertion/Deletion in Pancreas Transplant Recipients and Its Association With Type 1 Diabetes Mellitus. EXP CLIN TRANSPLANT 2019; 19:154-159. [PMID: 30702046 DOI: 10.6002/ect.2018.0162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Human leukocyte antigen-G is an immuno-modulatory factor that affects acute allograft rejection and autoimmune diseases such as type 1 diabetes mellitus. In this study, possible associations between human leukocyte antigen-G 14-bp insertion/deletion polymorphism and acute pancreas rejection were investigated. MATERIALS AND METHODS Human leukocyte antigen-G genotyping was assessed in 102 Iranian pancreas transplant recipients (including 41 with acute rejection and 61 with nonacute rejection). Results were compared with 100 individuals in a normal control group. RESULTS No significant differences in genotype frequencies of human leukocyte antigen-G 14-bp insertion / deletion were observed in recipients who had acute rejection episodes. On the other hand, the insertion / insertion genotype was a risk factor for susceptibility to type 1 diabetes mellitus (odds ratio = 3.82, 95% confidence interval, 1.37- 11.22; P = .005). CONCLUSIONS Our results provided evidence revealing that the human leukocyte antigen-G insertion / insertion genotype might be involved in the pathogenesis of type 1 diabetes mellitus.
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Affiliation(s)
- Firoozeh Rezaei
- From the Shiraz Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; and the Department of Biochemistry, Faculty of Basic Sciences, Shiraz Branch, Islamic Azad University, Shiraz, Iran
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18
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Ajith A, Portik-Dobos V, Nguyen-Lefebvre AT, Callaway C, Horuzsko DD, Kapoor R, Zayas C, Maenaka K, Mulloy LL, Horuzsko A. HLA-G dimer targets Granzyme B pathway to prolong human renal allograft survival. FASEB J 2019; 33:5220-5236. [PMID: 30620626 DOI: 10.1096/fj.201802017r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Human leukocyte antigen G (HLA-G), a nonclassic HLA class Ib molecule involved in the maintenance of maternal tolerance to semiallogeneic fetal tissues during pregnancy, has emerged as a potential therapeutic target to control allograft rejection. We demonstrate here that the level of soluble HLA-G dimer was higher in a group of 90 patients with a functioning renal allograft compared with 40 patients who rejected (RJ) their transplants. The HLA-G dimer level was not affected by demographic status. One of the potential mechanisms in tissue-organ allograft rejection involves the induction of granzymes and perforin, which are the main effector molecules expressed by CD8+ cytotoxic T lymphocytes and function to destroy allogeneic transplants. Using genomics and molecular and cellular analyses of cells from T-cell-mediated RJ and nonrejected kidney transplant patients, cells from leukocyte Ig-like receptor B1 (LILRB1) transgenic mice, humanized mice, and genetically engineered HLA-G dimer, we demonstrated a novel mechanism by which HLA-G dimer inhibits activation and cytotoxic capabilities of human CD8+ T cells. This mechanism implicated the down-regulation of Granzyme B expression and the essential involvement of LILRB1. Thus, HLA-G dimer has the potential to be a specific and effective therapy for prevention of allograft rejection and prolongation of graft survival.-Ajith, A., Portik-Dobos, V., Nguyen-Lefebvre, A. T., Callaway, C., Horuzsko, D. D., Kapoor, R., Zayas, C., Maenaka, K., Mulloy, L. L., Horuzsko, A. HLA-G dimer targets Granzyme B pathway to prolong human renal allograft survival.
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Affiliation(s)
- Ashwin Ajith
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Vera Portik-Dobos
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Anh Thu Nguyen-Lefebvre
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Christine Callaway
- Division of Nephrology, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Daniel D Horuzsko
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Rajan Kapoor
- Division of Nephrology, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Carlos Zayas
- Division of Nephrology, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Katsumi Maenaka
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Laura L Mulloy
- Division of Nephrology, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Anatolij Horuzsko
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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Contini P, Negrini S, Murdaca G, Borro M, Puppo F. Evaluation of membrane-bound and soluble forms of human leucocyte antigen-G in systemic sclerosis. Clin Exp Immunol 2018; 193:152-159. [PMID: 29660112 PMCID: PMC6046504 DOI: 10.1111/cei.13134] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2018] [Indexed: 12/26/2022] Open
Abstract
Systemic sclerosis (SSc) is a complex disease characterized by immune dysregulation, extensive vascular damage and widespread fibrosis. Human leucocyte antigen-G (HLA-G) is a non-classic class I major histocompatibility complex (MHC) molecule characterized by complex immunomodulating properties. HLA-G is expressed on the membrane of different cell lineages in both physiological and pathological conditions. HLA-G is also detectable in soluble form (sHLA-G) deriving from the shedding of surface isoforms (sHLA-G1) or the secretion of soluble isoforms (HLA-G5). Several immunosuppressive functions have been attributed to both membrane-bound and soluble HLA-G molecules. The plasma levels of sHLA-G were higher in SSc patients (444·27 ± 304·84 U/ml) compared to controls (16·74 ± 20·58 U/ml) (P < 0·0001). The plasma levels of transforming growth factor (TGF)-β were higher in SSc patients (18 937 ± 15 217 pg/ml) compared to controls (11 099 ± 6081 pg/ml; P = 0·003), and a significant correlation was found between TGF-β and the plasma levels of total sHLA-G (r = 0·65; P < 0·01), sHLA-G1 (r = 0·60; P = 0·003) and HLA-G5 (r = 0·47; P = 0·02). The percentage of HLA-G-positive monocytes (0·98 ± 1·72), CD4+ (0·37 ± 0·68), CD8+ (2·05 ± 3·74) and CD4+ CD8+ double-positive cells (14·53 ± 16·88) was higher in SSc patients than in controls (0·11 ± 0·08, 0·01 ± 0·01, 0·01 ± 0·01 and 0·39 ± 0·40, respectively) (P < 0·0001). These data indicate that in SSc the secretion and/or shedding of soluble HLA-G molecules and the membrane expression of HLA-G by peripheral blood mononuclear cells (PBMC) is clearly elevated, suggesting an involvement of HLA-G molecules in the immune dysregulation of SSc.
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Affiliation(s)
- P. Contini
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - S. Negrini
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - G. Murdaca
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - M. Borro
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
| | - F. Puppo
- Department of Internal MedicineClinical Immunology Unit, University of Genoa and Ospedale Policlinico San MartinoGenoaItaly
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Lazarte J, Adamson MB, Tumiati LC, Delgado DH. 10-Year Experience with HLA-G in Heart Transplantation. Hum Immunol 2018; 79:587-593. [PMID: 29859206 DOI: 10.1016/j.humimm.2018.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 11/19/2022]
Abstract
The Human Leukocyte Antigen-G (HLA-G) is a MHC-class Ib molecule with robust immunomodulatory properties; in transplant, it inhibits cytotoxic activity of immune cells and thus has a pivotal role in protecting the allograft from immune attack. The present review details a 10-year experience investigating the influence of HLA-G on heart transplantation, allograft rejection and cardiac allograft vasculopathy development. Exploration of HLA-G in transplantation began with the initial findings of its increased expression in allograft hearts. Since then, HLA-G has been recognized as an important factor in transplant immunology. We discuss inducers of HLA-G expression, and the importance of HLA-G as a potential biomarker in allograft rejection and heart failure. We also highlight the importance of polymorphisms and how they may influence both HLA-G expression and clinical outcomes. There remains much to be done in this field, however we hope that findings from our group and other groups will ignite interest and facilitate further expansion of HLA-G research in transplantation.
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Affiliation(s)
- Julieta Lazarte
- Departments of Medicine, Schulich School of Medicine, Western University, London, Ontario, Canada.
| | - Mitchell B Adamson
- Department of Medicine, Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Laura C Tumiati
- Department of Cardiovascular Surgery, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada
| | - Diego H Delgado
- Department of Cardiology, Hear Failure and Transplant Program, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada
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Inhibition of T Cell Alloreactivity by Bronchial Epithelium Is Impaired in Lung Transplant Recipients, Through Pathways Involving TGF-β, IL-10 and HLA-G. Transplantation 2017; 101:2192-2199. [PMID: 27820781 DOI: 10.1097/tp.0000000000001553] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Bronchiolitis obliterans syndrome (BOS) after lung transplantation (LTx) results from bronchial epithelial cell (BECs) damages, thought to be orchestrated by T cells primed by antigen-presenting cell presenting alloantigens. In this cell cross-talk, BECs are also suspected to play a pivotal immunosuppressive role in T cell alloreactivity. We studied the immunomodulating role of BECs in a human ex vivo model of allogeneic T cell response, both in healthy subjects and LTx recipients. METHODS BECs from 35 LTx recipients (n = 22 stable, n = 13 BOS) and healthy controls (n = 25) were cultured as primary cell cultures. Their inhibitory capacities through the involvement of tolerogenic molecules (HLA-G, TGF-β, and IL-10) were tested on a mixed lymphocyte reaction between antigen-presenting cells and recipient T cells. RESULTS Control BECs inhibited T cell alloproliferation by a mean of 53 ± 7%. This inhibitory effect of BECs was significantly reduced in the stable LTx group (24 ± 8%, P = 0.009), but not in the BOS TxP group (53 ± 10%, P = 0.97). Neutralization of HLA-G, TGF-β, and IL-10 partially restored T cell alloproliferation, arguing for their involvement in the immunosuppressive effect of BECs. BECs culture supernatant from stable LTx patients with impaired BEC properties showed a skewed Th2-type secretion profile (high IL-4/IFN-γ ratio). CONCLUSIONS The inhibitory properties of BECs are dysregulated in stable LTx recipients, which could suggest their instrumental role in the initiation of BOS process and potential targeted therapies.
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The Selective JAK1/3-Inhibitor R507 Mitigates Obliterative Airway Disease Both With Systemic Administration and Aerosol Inhalation. Transplantation 2017; 100:1022-31. [PMID: 26910327 DOI: 10.1097/tp.0000000000001110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND The efficacy of selective Janus kinase 1/3 inhibitor R507 to prevent obliterative airway disease was analyzed in preclinical airway transplantation models. METHODS Orthotopic trachea transplantations were performed between Lewis donors and Brown Norway rat recipients. Oral everolimus (4 mg/kg once per day) or oral respective inhaled R507 (60 mg/kg twice per day, each) was used for immunosuppression. Grafts were retrieved after 6 or 60 days. Toxicity and anti-inflammatory effects of R507 were analyzed on human airway epithelial cells. RESULTS In 6-day animals, oral and inhaled R507 more potently diminished mononuclear graft infiltration than everolimus and preserved ciliated pseudostratified columnar respiratory epithelium. Everolimus and R507 similarly suppressed systemic cellular and humoral immune activation. In untreated rats, marked obliterative airway disease developed over 60 days. Oral and inhaled R507 was significantly more effective in reducing airway obliteration and preserved the morphology of the airway epithelium. Luciferase-positive donors revealed that a substantial amount of smooth muscle cells within the obliterative tissue was of donor origin. Only everolimus but not R507, adversely altered kidney function and lipid profiles. The R507 aerosol did not show airway toxicity in vitro but effectively suppressed activation of inflammatory signaling pathways induced by IL-1β. CONCLUSIONS The Janus kinase 1/3 inhibitor R507 is a very well-tolerated immunosuppressant that similarly diminished obliterative airway disease with systemic or inhaled administration.
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Okushi Y, Okino K, Mukai K, Matsui Y, Hayashi N, Fujimoto K, Adachi H, Yamaya H, Yokoyama H. Circulating and renal expression of HLA-G prevented chronic renal allograft dysfunction in Japanese recipients. Clin Exp Nephrol 2017; 21:932-940. [DOI: 10.1007/s10157-016-1378-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/05/2016] [Indexed: 11/28/2022]
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Lazarte J, Goldraich L, Manlhiot C, Kozuszko S, Rao V, Delgado D. Human Leukocyte Antigen-G Polymorphisms Association With Cancer Post-Heart Transplantation. Hum Immunol 2016; 77:805-11. [DOI: 10.1016/j.humimm.2016.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/22/2015] [Accepted: 01/04/2016] [Indexed: 11/30/2022]
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Allergen-driven HLA-G expression and secretion in peripheral blood mononuclear cells from allergic rhinitis patients. Hum Immunol 2016; 77:1172-1178. [PMID: 27527921 DOI: 10.1016/j.humimm.2016.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 07/21/2016] [Accepted: 08/10/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND It has been reported that soluble HLA-G serum levels are increased in patients with pollen-induced allergic rhinitis and decrease after immunotherapy. However, no functional study has been conducted so far. The aim of this study was to evaluate the membrane expression and secretion of HLA-G molecules in peripheral blood mononuclear cells from allergic rhinitis patients after in vitro incubation with the causal allergen. METHODS AND RESULTS Twenty-two allergic rhinitis patients and ten healthy subjects were enrolled. Membrane HLA-G expression was determined by flow cytometry and soluble HLA-G in culture supernatant was determined by immunoenzymatic assay. HLA-G expression was detected in CD4+ (T-helper-2) cells and monocytes after in vitro stimulation with the causal allergen but not with non specific stimuli and non causal allergens. Accordingly, the release of soluble HLA-G in culture supernatant occurred only after the stimulation with the causal allergen. Collectively, these results were confirmed by Western blot analysis. CONCLUSIONS The present study provides the first in vitro evidence that in allergic patients HLA-G expression and secretion is specifically induced by the causal allergen. These data may add new insights into the pathogenetic mechanisms underlying allergic inflammation and allergen specific immunotherapy.
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von Websky MW, Kitamura K, Ludwig-Portugall I, Kurts C, von Laffert M, LeMaoult J, Carosella ED, Abu-Elmagd K, Kalff JC, Schäfer N. Recombinant HLA-G as Tolerogenic Immunomodulant in Experimental Small Bowel Transplantation. PLoS One 2016; 11:e0158907. [PMID: 27404095 PMCID: PMC4942037 DOI: 10.1371/journal.pone.0158907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/23/2016] [Indexed: 11/18/2022] Open
Abstract
The non-classical MHC I paralogue HLA-G is expressed by cytotrophoblast cells and implicated with fetomaternal tolerance by downregulating the maternal adaptive and innate immune response against the fetus. HLA-G expression correlates with favorable graft outcome in humans and recently promising immunosuppressive effects of therapeutic HLA-G in experimental transplantation (skin allograft acceptance) were shown. Consequently, we examined this novel therapeutic approach in solid organ transplantation. In this study, therapeutic recombinant HLA-G5 was evaluated for the first time in a solid organ model of acute rejection (ACR) after orthotopic intestinal transplantation (ITX). Allogenic ITX was performed in rats (Brown Norway to Lewis) with and without HLA-G treatment. It was found that HLA-G treatment significantly reduced histologically proven ACR at both an early and late postoperative timepoint (POD 4/7), concomitant to a functionally preserved graft contractility at POD 7. Interestingly, graft infiltration by myeloperoxidase+ cells was significantly reduced at POD7 by HLA-G treatment. Moreover, HLA-G treatment showed an effect on the allogenic T-cell immune response as assessed by flow cytometry: The influx of recipient-derived CD8+ T-cells into the graft mesenteric lymphnodes at POD7 was significantly reduced while CD4+ populations were not affected. As a potential mechanism of action, an induction of T-reg populations in the mesenteric lymphnodes was postulated, but flow cytometric analysis of classical CD4+/CD25+/FoxP3+Treg-cells showed no significant alteration by HLA-G treatment. The novel therapeutic approach using recombinant HLA-G5 reported herein demonstrates a significant immunosuppressive effect in this model of allogenic experimental intestinal transplantation. This effect may be mediated via inhibition of recipient-derived CD8+ T-cell populations either directly or by induction of non-classical Treg populations.
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Affiliation(s)
| | - Koji Kitamura
- Department of Surgery, University Hospital of Bonn, Bonn, Germany
- Department of Hepatobiliary Pancreatic Surgery and Transplantation, Kyoto University Hospital, Kyoto, Japan
| | | | - Christian Kurts
- Institute for Experimental Immunology, University of Bonn, Germany
| | | | - Joel LeMaoult
- CEA, iMETI, Research Division in Hematology and Immunology, Saint-Louis Hospital, Paris, France
| | - Edgardo D. Carosella
- CEA, iMETI, Research Division in Hematology and Immunology, Saint-Louis Hospital, Paris, France
| | - Kareem Abu-Elmagd
- Transplant Center, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Joerg C. Kalff
- Department of Surgery, University Hospital of Bonn, Bonn, Germany
| | - Nico Schäfer
- Department of Surgery, University Hospital of Bonn, Bonn, Germany
- * E-mail:
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Human leukocyte antigen G single-nucleotide polymorphism -201 (CC-CC) donor-recipient genotype matching as a predictor of severe cardiac allograft vasculopathy. J Heart Lung Transplant 2016; 35:1101-7. [PMID: 27287629 DOI: 10.1016/j.healun.2016.04.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 03/23/2016] [Accepted: 04/13/2016] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND In heart transplant recipients, human leukocyte antigen G (HLA-G) has been shown to inhibit endothelial and smooth muscle cells injury in vitro, suggesting protection against cardiac allograft vasculopathy (CAV). Although the expression of HLA-G is regulated by single-nucleotide polymorphisms (SNPs), their association with CAV remains unknown. Therefore, the objective of this study was to determine the association between recipient and donor HLA-G SNPs with CAV. METHODS We retrospectively analyzed DNA for HLA-G SNPs of 251 adult heart recipients, 196 of whom had their corresponding donors included. Severe CAV was defined as ISHLT Category 2 or 3. The association between donor-recipient genotypes and diagnosis of severe CAV over time was evaluated with parametric hazard regression models. RESULTS Recipient age was 48 ± 12 years, whereas donor age was 35 ± 14 years. Median follow-up was 5.0 years (range 1 day to 13.2 years). At 10 years after transplantation, freedom from severe CAV, retransplantation or death was 64%. In multivariable analysis adjusted for donor age, recipient weight and pre-transplant Class II antibodies, the presence of donor-recipient SNP -201 (CC-CC) matching was associated with an increased risk of severe CAV (hazard ratio 11.9; 95% confidence interval 4.3 to 32.9; p < 0.001). CONCLUSIONS Matching of donor-recipient SNP -201 (CC-CC) was an independent risk factor for the diagnosis of severe CAV. HLA-G SNP genotypes may reveal a pathogenic pathway to be explored for diagnostic and therapeutic strategies for CAV.
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Lazarte J, Tumiati LC, Rao V, Delgado DH. New Developments in HLA-G in Cardiac Transplantation. Hum Immunol 2015; 77:740-5. [PMID: 26707934 DOI: 10.1016/j.humimm.2015.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 12/08/2015] [Accepted: 12/08/2015] [Indexed: 12/20/2022]
Abstract
Human Leukocyte Antigen-G (HLA-G) is a non-classical class 1b protein, whose gene is located on chromosome 6 (6p21.31). HLA-G inhibits the immune cells' cytotoxic activity by interacting with specific receptors on their membranes. Since it is a naturally occurring immune modulator, HLA-G has been investigated in transplantation. Indeed, a number of investigations reveal that HLA-G expression is influenced by genetic polymorphisms and in turn, those polymorphisms are associated with detrimental or beneficial outcomes in various pathological situations. The present review introduces the HLA-G molecule, the gene and its polymorphisms. It focuses on the expression of HLA-G and the role of polymorphisms primarily in heart transplant outcomes, secondarily in other transplant organs, as well as the role of the allograft and effect of medical therapy. We discuss the limitations in HLA-G transplant investigations and future directions. The immune inhibiting activity of HLA-G has a great deal of potential for its utilization in enhancing diagnostic, preventive and therapeutic strategies against rejection in the setting of transplantation.
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Affiliation(s)
- Julieta Lazarte
- Division of Cardiovascular Surgery, Peter Munk Cardiac Centre, Toronto General Hospital-University Health Network, Toronto, Ontario, Canada.
| | - Laura C Tumiati
- Division of Cardiovascular Surgery, Peter Munk Cardiac Centre, Toronto General Hospital-University Health Network, Toronto, Ontario, Canada
| | - Vivek Rao
- Division of Cardiovascular Surgery, Peter Munk Cardiac Centre, Toronto General Hospital-University Health Network, Toronto, Ontario, Canada
| | - Diego H Delgado
- Division of Cardiology, Peter Munk Cardiac Centre, Toronto General Hospital-University Health Network, Toronto, Ontario, Canada
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Prominent HLA-G Expression in Liver Disease But Not After Liver Transplantation. Transplantation 2015; 99:2514-22. [DOI: 10.1097/tp.0000000000000761] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Žilinská Z, Bandžuchová H, Chrastina M, Trebatický B, Breza J, Handzušová M, Kuba D, Tirpáková J, Pavlechová M, Dedinská I, Rychlý B, Poláková K. Expression of HLA-G transcripts in graft biopsy samples of renal transplant recipients. Transpl Immunol 2015; 33:159-65. [DOI: 10.1016/j.trim.2015.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 10/02/2015] [Accepted: 10/04/2015] [Indexed: 10/22/2022]
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Di Cristofaro J, Reynaud-Gaubert M, Carlini F, Roubertoux P, Loundou A, Basire A, Frassati C, Thomas P, Gomez C, Picard C. HLA-G*01:04∼UTR3 Recipient Correlates With Lower Survival and Higher Frequency of Chronic Rejection After Lung Transplantation. Am J Transplant 2015; 15:2413-20. [PMID: 25989360 DOI: 10.1111/ajt.13305] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/11/2015] [Accepted: 03/05/2015] [Indexed: 01/25/2023]
Abstract
Lung transplantation (LTx) is a valid therapeutic option for selected patients with end-stage lung disease. Soluble HLA-G (sHLA-G) has been associated with increased graft survival and decreased rejection episodes in solid organ transplantation. HLA-G haplotypes named UTRs, defined by SNPs from both the 5'URR and 3'UTR, have been reported to reliably predict sHLA-G level. The aim of this retrospective study was to determine the impact of HLA-G alleles and UTR polymorphism from LTx recipients on anti-HLA allo-immunization risk, overall survival and chronic rejection (CLAD). HLA-G SNPs were genotyped in 124 recipients who underwent LTx from 1996 to 2010 in Marseille, 123 healthy individuals and 26 cystic fibrosis patients not requiring LTx. sHLA-G levels were measured for 38 LTx patients at D0, M3 and M12 and for 123 healthy donors. HLA-G*01:06∼UTR2 was associated with a worse evolution of cystic fibrosis (p = 0.005) but not of long-term survival post-LTx. HLA-G*01:04∼UTR3 haplotype was associated with lower levels of sHLA-G at D0 and M3 (p = 0.03), impaired long-term survival (p = 0.001), increased CLAD occurrence (p = 0.03) and the production of de novo donor-specific antibodies (DSA) at M3 (p = 0.01). This study is the first to show the deleterious association of different HLA-G alleles and UTRs in LTx.
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Affiliation(s)
- J Di Cristofaro
- Aix-Marseille Université, CNRS, EFS, ADES UMR 7268, Marseille, France
| | - M Reynaud-Gaubert
- Service de Pneumologie et Transplantation Pulmonaire, CHU Nord Faculté de Médecine, URMITE - CNRS-UMR 6236, Aix Marseille Université, Marseille, France
| | - F Carlini
- Aix-Marseille Université, CNRS, EFS, ADES UMR 7268, Marseille, France
| | - P Roubertoux
- Inserm U491, Génétique Médicale et Développement, Aix-Marseille Université, Faculté de Médecine, Marseille, France
| | - A Loundou
- Department of Public Health -EA 3279 Research Unit, University Hospital Marseille, Aix-Marseille University, Marseille, France
| | - A Basire
- Immunogenetics laboratory, EFS-Alpes Méditerranée, Marseille, France
| | - C Frassati
- Immunogenetics laboratory, EFS-Alpes Méditerranée, Marseille, France
| | - P Thomas
- Service de Chirurgie Thoracique, Hôpital Nord, Marseille, France
| | - C Gomez
- Service de Pneumologie et Transplantation Pulmonaire, CHU Nord Faculté de Médecine, URMITE - CNRS-UMR 6236, Aix Marseille Université, Marseille, France
| | - C Picard
- Aix-Marseille Université, CNRS, EFS, ADES UMR 7268, Marseille, France.,Immunogenetics laboratory, EFS-Alpes Méditerranée, Marseille, France
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Amiot L, Vu N, Samson M. Biology of the immunomodulatory molecule HLA-G in human liver diseases. J Hepatol 2015; 62:1430-7. [PMID: 25772038 DOI: 10.1016/j.jhep.2015.03.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 02/05/2015] [Accepted: 03/02/2015] [Indexed: 01/16/2023]
Abstract
The non-classical human leukocyte antigen-G (HLA-G), plays an important role in inducing tolerance, through its immunosuppressive effects on all types of immune cells. Immune tolerance is a key issue in the liver, both in liver homeostasis and in the response to liver injury or cancer. It would therefore appear likely that HLA-G plays an important role in liver diseases. Indeed, this molecule was recently shown to be produced by mast cells in the livers of patients infected with hepatitis C virus (HCV). Furthermore, the number of HLA-G-positive mast cells was significantly associated with fibrosis progression. The generation of immune tolerance is a role common to both HLA-G, as a molecule, and the liver, as an organ. This review provides a summary of the evidence implicating HLA-G in liver diseases. In the normal liver, HLA-G transcripts can be detected, but there is no HLA-G protein. However, HLA-G protein is detectable in the liver tissues and/or plasma of patients suffering from hepatocellular carcinoma, hepatitis B or C, or visceral leishmaniasis and in liver transplant recipients. The cells responsible for producing HLA-G differ between diseases. HLA-G expression is probably induced by microenvironmental factors, such as cytokines. The expression of HLA-G receptors, such as ILT2, ILT4, and KIRD2L4, on liver cells has yet to be investigated, but these receptors have been detected on all types of immune cells, and such cells are present in liver. The tolerogenic properties of HLA-G explain its deleterious effects in cancers and its beneficial effects in transplantation. Given the key role of HLA-G in immune tolerance, new therapeutic agents targeting HLA-G could be tested for the treatment of these diseases in the future.
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Affiliation(s)
- Laurence Amiot
- Institut National de la Santé et de la Recherche Médicale (Inserm), U.1085, Institut de Recherche Santé Environnement & Travail (IRSET), F-35043 Rennes, France; Université de Rennes 1, F-35043 Rennes, France; Fédération de Recherche BioSit de Rennes UMS 3480, F-35043 Rennes, France; Department of Biology, University Hospital Pontchaillou, CHU Pontchaillou, Rennes, France.
| | - Nicolas Vu
- Institut National de la Santé et de la Recherche Médicale (Inserm), U.1085, Institut de Recherche Santé Environnement & Travail (IRSET), F-35043 Rennes, France; Université de Rennes 1, F-35043 Rennes, France; Fédération de Recherche BioSit de Rennes UMS 3480, F-35043 Rennes, France
| | - Michel Samson
- Institut National de la Santé et de la Recherche Médicale (Inserm), U.1085, Institut de Recherche Santé Environnement & Travail (IRSET), F-35043 Rennes, France; Université de Rennes 1, F-35043 Rennes, France; Fédération de Recherche BioSit de Rennes UMS 3480, F-35043 Rennes, France
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Poláková K, Bandžuchová H, Žilinská Z, Chreňová S, Kuba D, Russ G. Analysis of HLA-G expression in serum and biopsy samples of kidney transplant recipients. Immunobiology 2015; 220:533-7. [DOI: 10.1016/j.imbio.2014.10.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/17/2014] [Accepted: 10/20/2014] [Indexed: 01/05/2023]
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Brugière O, Thabut G, Krawice-Radanne I, Rizzo R, Dauriat G, Danel C, Suberbielle C, Mal H, Stern M, Schilte C, Pretolani M, Carosella ED, Rouas-Freiss N. Role of HLA-G as a predictive marker of low risk of chronic rejection in lung transplant recipients: a clinical prospective study. Am J Transplant 2015; 15:461-71. [PMID: 25488753 DOI: 10.1111/ajt.12977] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 08/04/2014] [Accepted: 08/07/2014] [Indexed: 01/25/2023]
Abstract
Human leukocyte antigen G (HLA-G) expression is thought to be associated with a tolerance state following solid organ transplantation. In a lung transplant (LTx) recipient cohort, we assessed (1) the role of HLA-G expression as a predictor of graft acceptance, and (2) the relationship between (i) graft and peripheral HLA-G expression, (ii) HLA-G expression and humoral immunity and (iii) HLA-G expression and lung microenvironment. We prospectively enrolled 63 LTx recipients (median follow-up 3.26 years [min: 0.44-max: 5.03]). At 3 and 12 months post-LTx, we analyzed graft HLA-G expression by immunohistochemistry, plasma soluble HLA-G (sHLA-G) level by enzyme-linked immunosorbent assay, bronchoalveolar lavage fluid (BALF) levels of cytokines involved in chronic lung allograft dysfunction (CLAD) and anti-HLA antibodies (Abs) in serum. In a time-dependent Cox model, lung HLA-G expression had a protective effect on CLAD occurrence (hazard ratio: 0.13 [0.03-0.58]; p = 0.008). The same results were found when computing 3-month and 1-year conditional freedom from CLAD (p = 0.03 and 0.04, respectively [log-rank test]). Presence of anti-HLA Abs was inversely associated with graft HLA-G expression (p = 0.02). Increased BALF level of transforming growth factor-β was associated with high plasma sHLA-G level (p = 0.02). In conclusion, early graft HLA-G expression in LTx recipients with a stable condition was associated with graft acceptance in the long term.
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Affiliation(s)
- O Brugière
- Service de Pneumologie B et de Transplantation Pulmonaire, Centre Hospitalier Universitaire (CHU) Bichat-Claude Bernard, Paris, France; Faculté de Médecine Denis Diderot, Université Paris 7, Paris, France; Assistance Publique des Hôpitaux de Paris (AP-HP), Paris, France; DHU Fire, Paris, France; CEA, Institut des Maladies Emergentes et des Therapies Innovantes (IMETI), Service de Recherche en Hemato-Immunologie (SRHI), Hopital Saint-Louis, Paris, France; Sorbonne Paris Cité, University Paris Diderot, IUH, Hopital Saint-Louis, Paris, France
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White SR, Floreth T, Liao C, Bhorade SM. Association of soluble HLA-G with acute rejection episodes and early development of bronchiolitis obliterans in lung transplantation. PLoS One 2014; 9:e103643. [PMID: 25068264 PMCID: PMC4113443 DOI: 10.1371/journal.pone.0103643] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 07/04/2014] [Indexed: 12/25/2022] Open
Abstract
Lung transplantation has evolved into a life-saving therapy for select patients with end-stage lung diseases. However, long-term survival remains limited because of bronchiolitis obliterans syndrome (BOS). Soluble HLA-G, a mediator of adaptive immunity that modulates regulatory T cells and certain classes of effector T cells, may be a useful marker of survival free of BOS. We conducted a retrospective, single-center, pilot review of 38 lung transplant recipients who underwent collection of serum and bronchoalveolar lavage fluid 3, 6 and 12 months after transplantation, and compared soluble HLA-G concentrations in each to the presence of type A rejection and lymphocytic bronchiolitis in the first 12 months and to the presence of BOS at 24 months after transplantation. Lung soluble HLA-G concentrations were directly related to the presence of type A rejection but not to lymphocytic bronchiolitis. Our data demonstrate that soluble HLA-G concentrations in bronchoalveolar lavage but not in serum correlates with the number of acute rejection episodes in the first 12 months after lung transplantation, and thus may be a reactive marker of rejection.
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Affiliation(s)
- Steven R. White
- Departments of Medicine and Health Studies, University of Chicago, Chicago, Illinois, United States of America
- * E-mail:
| | - Timothy Floreth
- Departments of Medicine and Health Studies, University of Chicago, Chicago, Illinois, United States of America
| | - Chuanhong Liao
- Departments of Medicine and Health Studies, University of Chicago, Chicago, Illinois, United States of America
| | - Sangeeta M. Bhorade
- Department of Medicine, Northwestern University, Chicago, Illinois, United States of America
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Rebmann V, da Silva Nardi F, Wagner B, Horn PA. HLA-G as a tolerogenic molecule in transplantation and pregnancy. J Immunol Res 2014; 2014:297073. [PMID: 25143957 PMCID: PMC4131093 DOI: 10.1155/2014/297073] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/07/2014] [Accepted: 05/21/2014] [Indexed: 12/28/2022] Open
Abstract
HLA-G is a nonclassical HLA class I molecule. In allogeneic situations such as pregnancy or allograft transplantation, the expression of HLA-G has been related to a better acceptance of the fetus or the allograft. Thus, it seems that HLA-G is crucially involved in mechanisms shaping an allogeneic immune response into tolerance. In this contribution we focus on (i) how HLA-G is involved in transplantation and human reproduction, (ii) how HLA-G is regulated by genetic and microenvironmental factors, and (iii) how HLA-G can offer novel perspectives with respect to therapy.
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Affiliation(s)
- Vera Rebmann
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
| | - Fabiola da Silva Nardi
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
- CAPES Foundation, Ministry of Education of Brazil, 70.040-020 Brasília, DF, Brazil
| | - Bettina Wagner
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
| | - Peter A. Horn
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
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Osteodifferentiated mesenchymal stem cells from bone marrow and adipose tissue express HLA-G and display immunomodulatory properties in HLA-mismatched settings: implications in bone repair therapy. J Immunol Res 2014; 2014:230346. [PMID: 24877156 PMCID: PMC4022112 DOI: 10.1155/2014/230346] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/10/2014] [Indexed: 12/20/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are multipotent cells that can be obtained from several sources such as bone marrow and adipose tissue. Depending on the culture conditions, they can differentiate into osteoblasts, chondroblasts, adipocytes, or neurons. In this regard, they constitute promising candidates for cell-based therapy aimed at repairing damaged tissues. In addition, MSCs display immunomodulatory properties through the expression of soluble factors including HLA-G. We here analyse both immunogenicity and immunosuppressive capacity of MSCs derived from bone marrow and adipose tissue before and after osteodifferentiation. Results show that HLA-G expression is maintained after osteodifferentiation and can be boosted in inflammatory conditions mimicked by the addition of IFN-γ and TNF-α. Both MSCs and osteodifferentiated MSCs are hypoimmunogenic and exert immunomodulatory properties in HLA-mismatched settings as they suppress T cell alloproliferation in mixed lymphocyte reactions. Finally, addition of biomaterials that stimulate bone tissue formation did not modify MSC immune properties. As MSCs combine both abilities of osteoregeneration and immunomodulation, they may be considered as allogenic sources for the treatment of bone defects.
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Liu H, Chen Y, Xuan L, Wu X, Zhang Y, Fan Z, Huang F, Zhang X, Jiang Q, Sun J, Liu Q. Soluble human leukocyte antigen G molecule expression in allogeneic hematopoietic stem cell transplantation: good predictor of acute graft-versus-host disease. Acta Haematol 2013; 130:160-8. [PMID: 23711991 DOI: 10.1159/000350488] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 02/28/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Graft-versus-host disease (GVHD) remains a main complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT). Human leukocyte antigen G (HLA-G) is a non-classical class I molecule exerting multiple immunoregulatory functions. The aim of this study was to explore the relationship between soluble HLA-G (sHLA-G) and GVHD after allo-HSCT. METHODS The sHLA-G levels were examined using enzyme-linked immunosorbent assay in patients with hematological malignancies (n = 106) before transplantation, on days +15 and +30 after transplantation, as well as healthy volunteers (n = 10). RESULTS The levels of sHLA-G5, sHLA-G6 and sHLA-G7 in patients on days +15 and +30 after transplantation were all significantly higher than those before transplantation (all p ≤ 0.001). The increased levels of sHLA-G5 on days +15 and +30 after transplantation were both significantly higher in patients with grade 0-I acute GVHD (aGVHD) compared to those with grade II-IV aGVHD (both p < 0.001). The increased levels of sHLA-G5 on days +15 and +30 after transplantation were both negatively correlated with the severity of aGVHD (both p < 0.001). CONCLUSION sHLA-G5 might be a predictor of the occurrence and severity of aGVHD, which may help to establish individual prophylaxis against aGVHD and improve the survival for patients after allo-HSCT.
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Affiliation(s)
- Hui Liu
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
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Impact of HLA-G 14-bp polymorphism on acute rejection and cytomegalovirus infection in kidney transplant recipients from northwestern China. Transpl Immunol 2012; 27:69-74. [DOI: 10.1016/j.trim.2012.06.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 06/21/2012] [Accepted: 06/22/2012] [Indexed: 11/21/2022]
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Lazana I, Zoudiari A, Kokkinou D, Themeli M, Liga M, Papadaki H, Papachristou D, Spyridonidis A. Identification of a novel HLA-G+ regulatory population in blood: expansion after allogeneic transplantation and de novo HLA-G expression at graft-versus-host disease sites. Haematologica 2012; 97:1338-47. [PMID: 22419574 DOI: 10.3324/haematol.2011.055871] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The human leukocyte antigen-G (HLA-G) has been considered to be an important tolerogeneic molecule playing an essential role in maternal-fetal tolerance, which constitutes the perfect example of successful physiological immunotolerance of semi-allografts. In this context, we investigated the putative role of this molecule in the allogeneic hematopoietic cell transplantation setting. DESIGN AND METHODS The percentage of HLA-G(+) cells in peripheral blood of healthy donors and allo-transplanted patients was evaluated by flow cytometry. Their immunoregulatory and tolerogeneic properties were investigated in in vitro immunostimulatory and immunosuppression assays. Immunohistochemical analysis for HLA-G expression was performed in skin biopsies from allo-transplanted patients and correlated with the occurrence of graft-versus-host disease. RESULTS We identified a CD14(+)HLA-G(pos) population with an HLA-DR(low) phenotype and decreased in vitro immunostimulatory capacity circulating in peripheral blood of healthy individuals. Naturally occurring CD14(+)HLA-G(pos) cells suppressed T-cell responses and exerted an immunotolerogenic action on T cells by rendering them hyporesponsive and immunosuppressive in vitro. After allogeneic hematopoietic cell transplantation, HLA-G(pos) cells increase in blood. Interestingly, besides an increase in CD14(+)HLA-G(pos) cells, there was also a pronounced expansion of CD3(+)HLA-G(pos) cells. Of note, CD3(+)HLA-G(pos) and CD14(+)HLA-G(pos) cells from transplanted patients were suppressive in in vitro lymphoproliferation assays. Furthermore, we found an upregulation of HLA-G expression in skin specimens from transplanted patients that correlated with graft-versus-host disease. Inflammatory cells infiltrating the dermis of transplanted patients were also HLA-G(pos). CONCLUSIONS We report the presence of naturally occurring HLA-G(pos) monocytic cells with in vitro suppressive properties. HLA-G expressing regulatory blood cells were found in increased numbers after allogeneic transplantation. Epithelial cells in skin affected by graft-versus-host disease revealed elevated HLA-G expression.
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Affiliation(s)
- Ioanna Lazana
- Department of Internal Medicine, Hematology Division, BMT Unit, Greece
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Cilião Alves DC, de Oliveira Crispim JC, Castelli EC, Mendes-Junior CT, Deghaide NHS, Barros Silva GE, Costa RS, Saber LT, Moreau P, Donadi EA. Human leukocyte antigen–G 3′ untranslated region polymorphisms are associated with better kidney allograft acceptance. Hum Immunol 2012; 73:52-9. [DOI: 10.1016/j.humimm.2011.10.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 10/04/2011] [Accepted: 10/07/2011] [Indexed: 11/29/2022]
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Lymphocyte cell-cycle inhibition by HLA-G is mediated by phosphatase SHP-2 and acts on the mTOR pathway. PLoS One 2011; 6:e22776. [PMID: 21887223 PMCID: PMC3160837 DOI: 10.1371/journal.pone.0022776] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Accepted: 07/05/2011] [Indexed: 11/19/2022] Open
Abstract
Human leukocyte antigen G (HLA-G) is involved in regulating T-cell responses through its interaction with inhibitory receptors belonging to the immunoglobulin-like transcript family (ILT). In this context, we investigated the pathways involved in the control of cell-cycle entry of T cells following HLA-G interaction with its inhibitory receptor. We show that HLA-G acts through its interaction with the LILRB1 receptor expressed on T lymphocytes. Both HLA-G and LILRB1 antibodies block the inhibitory effect of HLA-G and restore T-cell proliferation. The interaction of HLA-G with T lymphocytes is associated with phosphorylation of SHP-2 phosphatase, but not SHP-1. In addition, in activated T cells, their incubation with HLA-G is not associated with a decrease in the TCR or CD28 downstream pathways, but is associated with dephosphorylation of the mTOR molecule and p70S6K. In contrast, Akt, which acts upstream of mTOR, is not affected by HLA-G. The inhibition of SHP-2 by NSC-87877(5 µM), a chemical inhibitor of SHP-2, or the use of siRNA, abrogates dephosphorylation of mTOR and impairs the overexpression of p27kip in the presence of HLA-G. Together, these results indicate that HLA-G is associated with activation of phosphatase SHP-2, which inhibits the mTOR pathway and favors the inhibition of the cell-cycle entry of human-activated T cells.
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Lu N, Zhang Y, Zou X, Yang X, Tian J, Zhen J, Zhou Y, Zhao S, Shi W. HLA-G on peripheral blood CD4(+) T lymphocytes: a potential predictor for acute renal rejection. Transpl Int 2011; 24:1103-11. [PMID: 21848900 DOI: 10.1111/j.1432-2277.2011.01314.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
HLA-G Expression in grafts and serum has been shown to improve graft acceptance. However, its expression on peripheral blood lymphocytes (PBLs) during acute rejection (AR) remains unknown. In this study, we serially monitored HLA-G expression on CD4(+) and CD8(+) PBLs of 66 recipients undergoing renal transplantation using flow cytometry at different time points before and after transplantation, as well as during AR episode. In stable recipients, HLA-G expression on CD4(+) PBLs declined during the first week after transplantation and increased continuously with immunosuppressive therapy. Then, expression declined gradually after 1 month and remained at a higher level compared with pretransplantation. When AR occurred, HLA-G expression decreased significantly compared with the stable level. In three recipients suffering from recurrent rejection, it remained at a low level despite impact immunosuppressive treatment. With mix lymphocyte assay, HLA-G(+) CD4(+) T cells showed inhibitory role on proliferation of peripheral blood mononuclear cell. HLA-G expression on CD8(+) PBLs was almost undetectable at different time points in the recipients and healthy controls. Our results suggest that HLA-G on CD4(+) PBLs might provide a potential marker for the early diagnosis of renal AR and for the immunosuppressive status of recipients.
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Affiliation(s)
- Nan Lu
- Institute of Diagnostics, School of Medicine, Shandong University, Jinan, PR China.
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HLA-G level on monocytoid dendritic cells correlates with regulatory T-cell Foxp3 expression in liver transplant tolerance. Transplantation 2011; 91:1132-40. [PMID: 21423069 DOI: 10.1097/tp.0b013e31821414c9] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Human leukocyte antigen (HLA)-G is a nonclassical HLA class I molecule expressed as membrane-bound and soluble isoforms. Interaction of HLA-G with its receptor, immunoglobulin-like transcript 4 on dendritic cells (DCs) down-regulates their T-cell stimulatory ability. METHODS We examined expression of HLA-G, immunoglobulin-like transcript 4, other immune regulatory molecules (inducible costimulator ligand and glucocorticoid-induced tumor necrosis factor-related receptor ligand), and the activation marker CMRF44 on circulating monocytoid dendritic cell (mDC) and plasmacytoid dendritic cell by monoclonal antibody staining and flow cytometry. Three groups of stable liver transplant recipients: operationally tolerant (TOL), prospective immunosuppressive drug weaning, and maintenance immunosuppression (MI) were studied, together with healthy controls (HC). Serum HLA-G levels were measured by enzyme-linked immunosorbent assay. RESULTS In TOL patients, monocytoid dendritic cell (mDC) but not plasmacytoid dendritic cell expressed higher HLA-G than in MI patients or HC. In TOL patients, the incidence of CD4(+)CD25(hi)CD127(-) regulatory T cells (Treg) and the intensity of Treg forkhead box p3 (Foxp3) expression were significantly higher than in the MI group. HLA-G expression on circulating mDC correlated significantly with that of Foxp3 in the TOL group. There was no correlation between immunosuppressive drug (tacrolimus) dose or trough level and HLA-G expression or Treg frequency or Foxp3 expression. The incidence of patients with circulating HLA-G levels more than 100 ng/mL was highest in the TOL group, although statistical significance was not achieved. CONCLUSIONS Higher HLA-G expression on circulating mDC in TOL recipients compared with MI or HC, suggests a possible role of HLA-G in immune regulation possibly mediated by enhanced host Treg Foxp3 expression.
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Vargas RG, Sarturi PR, Mattar SB, Bompeixe EP, Silva JDS, Pirri A, da Graça Bicalho M. Association of HLA-G alleles and 3′ UTR 14 bp haplotypes with recurrent miscarriage in Brazilian couples. Hum Immunol 2011; 72:479-85. [DOI: 10.1016/j.humimm.2011.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 02/14/2011] [Accepted: 02/22/2011] [Indexed: 11/26/2022]
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Role of HLA-G in tumor escape through expansion of myeloid-derived suppressor cells and cytokinic balance in favor of Th2 versus Th1/Th17. Blood 2011; 117:7021-31. [PMID: 21482709 DOI: 10.1182/blood-2010-07-294389] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The expression of HLA-G by malignant cells has been proposed as a tumor escape mechanism from immunosurveillance. However, although the inhibitory effect of HLA-G on antitumoral immune effectors has been documented in vitro, it remains to be resolved in vivo. In this context, the development of an animal model is now a priority to establish the proof of concept that an HLA-G(+) tumor cell develops and tolerizes the host antitumor immune response in vivo. In the present study, we provide the first in vivo evidence of such a role by a xenotumor model in mice based on the interactions between human HLA-G and the murine paired immunoglobulin-like receptor-B (PIR-B). We demonstrate that human tumor cells expressing HLA-G grow in an immunocompetent host by affecting both innate and adaptive immunity. Expansion of blood myeloid-derived CD11b(+)Gr1(+)PIR-B(+) suppressor cells, loss of peripheral T cells, and cytokinic balance in favor of Th2 versus Th1/Th17 constitute the main mechanisms by which HLA-G promotes tumor expansion. These data demonstrate for the first time that HLA-G plays a crucial role in in vivo tumor evasion. Finally, blocking HLA-G function by a specific Ab inhibits the in vivo development of the tumor, offering a new innovative therapeutic strategy in cancer.
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Deschaseaux F, Delgado D, Pistoia V, Giuliani M, Morandi F, Durrbach A. HLA-G in organ transplantation: towards clinical applications. Cell Mol Life Sci 2011; 68:397-404. [PMID: 21103908 PMCID: PMC11114658 DOI: 10.1007/s00018-010-0581-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 10/22/2010] [Indexed: 11/28/2022]
Abstract
HLA-G plays a particular role during pregnancy in which its expression at the feto-maternal barrier participates into the tolerance of the allogenic foetus. HLA-G has also been demonstrated to be expressed in some transplanted patients, suggesting that it regulates the allogenic response. In vitro data indicate that HLA-G modulates NK cells, T cells, and DC maturation through its interactions with various inhibitory receptors. In this paper, we will review the data reporting the HLA-G involvement of HLA-G in human organ transplantation, then factors that can modulate HLA-G, and finally the use of HLA-G as a therapeutic tool in organ transplantation.
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Affiliation(s)
| | - Diego Delgado
- Heart Transplant Program, Peter Munk Cardiac Centre, Toronto General Hospital, University Health Network, Toronto, ON Canada
| | - Vito Pistoia
- Department of Neurosciences, Ophthalmology and Genetics, University of Genoa, Genoa, Italy
| | - Massimo Giuliani
- INSERM U1014, Département de Néphrologie, Hôpital du Kremlin-Bicêtre, IFRNT, Université Paris XI, 78 rue du Général Leclerc, 94270 Le Kremlin-Bicêtre, France
| | - Fabio Morandi
- Department of Neurosciences, Ophthalmology and Genetics, University of Genoa, Genoa, Italy
| | - Antoine Durrbach
- INSERM U1014, Département de Néphrologie, Hôpital du Kremlin-Bicêtre, IFRNT, Université Paris XI, 78 rue du Général Leclerc, 94270 Le Kremlin-Bicêtre, France
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Carosella ED, Gregori S, Rouas-Freiss N, LeMaoult J, Menier C, Favier B. The role of HLA-G in immunity and hematopoiesis. Cell Mol Life Sci 2011; 68:353-68. [PMID: 21116680 PMCID: PMC11114977 DOI: 10.1007/s00018-010-0579-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 10/22/2010] [Indexed: 12/14/2022]
Abstract
The non-classical HLA class I molecule HLA-G was initially shown to play a major role in feto-maternal tolerance. Since this discovery, it has been established that HLA-G is a tolerogenic molecule which participates to the control of the immune response. In this review, we summarize the recent advances on (1) the multiple structures of HLA-G, which are closely associated with their role in the inhibition of NK cell cytotoxicity, (2) the factors that regulate the expression of HLA-G and its receptors, (3) the mechanism of action of HLA-G at the immunological synapse and through trogocytosis, and (4) the generation of suppressive cells through HLA-G. Moreover, we also review recent findings on the non-immunological functions of HLA-G in erythropoiesis and angiogenesis.
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Affiliation(s)
- Edgardo D Carosella
- CEA, I2BM, Service de Recherches en Hemato-Immunologie, 75475 Paris, France.
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Donadi EA, Castelli EC, Arnaiz-Villena A, Roger M, Rey D, Moreau P. Implications of the polymorphism of HLA-G on its function, regulation, evolution and disease association. Cell Mol Life Sci 2010; 68:369-95. [PMID: 21107637 PMCID: PMC3021195 DOI: 10.1007/s00018-010-0580-7] [Citation(s) in RCA: 245] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 10/22/2010] [Indexed: 12/27/2022]
Abstract
The HLA-G gene displays several peculiarities that are distinct from those of classical HLA class I genes. The unique structure of the HLA-G molecule permits a restricted peptide presentation and allows the modulation of the cells of the immune system. Although polymorphic sites may potentially influence all biological functions of HLA-G, those present at the promoter and 3′ untranslated regions have been particularly studied in experimental and pathological conditions. The relatively low polymorphism observed in the MHC-G coding region both in humans and apes may represent a strong selective pressure for invariance, whereas, in regulatory regions several lines of evidence support the role of balancing selection. Since HLA-G has immunomodulatory properties, the understanding of gene regulation and the role of polymorphic sites on gene function may permit an individualized approach for the future use of HLA-G for therapeutic purposes.
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Affiliation(s)
- Eduardo A Donadi
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo, Av. Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brazil.
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