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Féray C, Taupin JL, Sebagh M, Allain V, Demir Z, Allard MA, Desterke C, Coilly A, Saliba F, Vibert E, Azoulay D, Guettier C, Chatton A, Debray D, Caillat-Zucman S, Samuel D. Donor HLA Class 1 Evolutionary Divergence Is a Major Predictor of Liver Allograft Rejection : A Retrospective Cohort Study. Ann Intern Med 2021; 174:1385-1394. [PMID: 34424731 DOI: 10.7326/m20-7957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The HLA evolutionary divergence (HED), a continuous metric quantifying the peptidic differences between 2 homologous HLA alleles, reflects the breadth of the immunopeptidome presented to T lymphocytes. OBJECTIVE To assess the potential effect of donor or recipient HED on liver transplant rejection. DESIGN Retrospective cohort study. SETTING Liver transplant units. PATIENTS 1154 adults and 113 children who had a liver transplant between 2004 and 2018. MEASUREMENTS Liver biopsies were done 1, 2, 5, and 10 years after the transplant and in case of liver dysfunction. Donor-specific anti-HLA antibodies (DSAs) were measured in children at the time of biopsy. The HED was calculated using the physicochemical Grantham distance for class I (HLA-A or HLA-B) and class II (HLA-DRB1 or HLA-DQB1) alleles. The influence of HED on the incidence of liver lesions was analyzed through the inverse probability weighting approach based on covariate balancing, generalized propensity scores. RESULTS In adults, class I HED of the donor was associated with acute rejection (hazard ratio [HR], 1.09 [95% CI, 1.03 to 1.16]), chronic rejection (HR, 1.20 [CI, 1.10 to 1.31]), and ductopenia of 50% or more (HR, 1.33 [CI, 1.09 to 1.62]) but not with other histologic lesions. In children, class I HED of the donor was also associated with acute rejection (HR, 1.16 [CI, 1.03 to 1.30]) independent of the presence of DSAs. There was no effect of either donor class II HED or recipient class I or class II HED on the incidence of liver lesions in adults and children. LIMITATION The DSAs were measured only in children. CONCLUSION Class I HED of the donor predicts acute or chronic rejection of liver transplant. This novel and accessible prognostic marker could orientate donor selection and guide immunosuppression. PRIMARY FUNDING SOURCE Institut National de la Santé et de la Recherche Médicale.
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Affiliation(s)
- Cyrille Féray
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Jean-Luc Taupin
- Laboratoire d'Immunologie et Histocompatibilité, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université de Paris, and unité Institut National de la Santé et de la Recherche Médicale 976, Université de Paris, Paris, France (J.T., S.C.)
| | - Mylène Sebagh
- Laboratoire d'Anatomopathologie, Assistance Publique-Hôpitaux de Paris, Hôpital Paul-Brousse, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale, Physiopathogénèse et traitement des maladies du Foie, and FHU Hepatinov, Villejuif, France (M.S., C.G.)
| | - Vincent Allain
- Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université de Paris, Laboratoire d'Immunologie et Histocompatibilité, and Institut National de la Santé et de la Recherche Médicale, Paris, France (V.A.)
| | - Zeynep Demir
- Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris, and Unité d'Hépatologie pédiatrique, Paris, France (Z.D., D.D.)
| | - Marc-Antoine Allard
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Christophe Desterke
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Audrey Coilly
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Faouzi Saliba
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Eric Vibert
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Daniel Azoulay
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
| | - Catherine Guettier
- Laboratoire d'Anatomopathologie, Assistance Publique-Hôpitaux de Paris, Hôpital Paul-Brousse, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale, Physiopathogénèse et traitement des maladies du Foie, and FHU Hepatinov, Villejuif, France (M.S., C.G.)
| | - Arthur Chatton
- Institut National de la Santé et de la Recherche Médicale UMR 1246-SPHERE, Nantes University, Tours University, Nantes, and IDBC, Pacé, France (A.C.)
| | - Dominique Debray
- Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris, Université de Paris, and Unité d'Hépatologie pédiatrique, Paris, France (Z.D., D.D.)
| | - Sophie Caillat-Zucman
- Laboratoire d'Immunologie et Histocompatibilité, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université de Paris, and unité Institut National de la Santé et de la Recherche Médicale 976, Université de Paris, Paris, France (J.T., S.C.)
| | - Didier Samuel
- Centre Hépato-Biliaire, Hôpital Paul-Brousse, Assistance Publique-Hôpitaux de Paris, Université Paris-Saclay, unité Institut National de la Santé et de la Recherche Médicale 1193, Villejuif, France (C.F., M.A., C.D., A.C., F.S., E.V., D.A., D.S.)
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Gandini A, Mampeule N, Jugwanth S, Gededzha MP, Mayne E. A Retrospective Study on Human Leukocyte Antigen Types and Haplotypes in a South African Population. Arch Pathol Lab Med 2021; 145:441-447. [PMID: 32960949 DOI: 10.5858/arpa.2020-0042-oa] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2020] [Indexed: 11/06/2022]
Abstract
CONTEXT.— Human leukocyte antigen (HLA) is a polymorphic protein of the immune system with a central role in organ transplantation. Organ recipients can be sensitized against HLA from previous exposure, which increases the likelihood of antidonor immune responses and subsequently organ rejection. HLA matching represents an attractive option to improve graft function, reduce sensitization of recipients in first transplantations, and improve organ allocation. OBJECTIVE.— To examine the feasibility of the reintroduction of HLA matching into the criteria in the Johannesburg program, we retrospectively assessed HLA types in our donor population. DESIGN.— HLA types of 782 deceased and related living donors from 2015 until 2019 were recorded and analyzed to identify the most common HLA types and haplotypes. A virtual crossmatch was also done to examine the anti-HLA antibodies in the recipient population compared with the common HLA types identified in this study. RESULTS.— Of the most common HLA types identified, at least 1 was present in 732 (93.6%) of the renal donors assessed. The virtual crossmatch confirmed that most recipients are sensitized against most donors, and this greatly impacts the number of recipients who can receive organ transplants. CONCLUSIONS.— This study determined the most common HLA types and haplotypes in a South African organ donor population. This information, combined with the evidence suggesting the immunogenic potential of these common types, the high number of recipients with antibodies against common HLA types, and the ethnic distribution of the donor and recipient populations, informs the recommendation that the pretransplantation workup should not reinclude HLA matching.
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Affiliation(s)
- Anastasia Gandini
- From the Department of Immunology, Faculty of Health Sciences, University of Witwatersrand (Gandini, Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa
| | - Nakampe Mampeule
- From the Department of Immunology, Faculty of Health Sciences, University of Witwatersrand (Gandini, Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa.,and the National Health Laboratory Service (Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa
| | - Sarika Jugwanth
- From the Department of Immunology, Faculty of Health Sciences, University of Witwatersrand (Gandini, Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa.,and the National Health Laboratory Service (Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa
| | - Maemu P Gededzha
- From the Department of Immunology, Faculty of Health Sciences, University of Witwatersrand (Gandini, Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa.,and the National Health Laboratory Service (Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa
| | - Elizabeth Mayne
- From the Department of Immunology, Faculty of Health Sciences, University of Witwatersrand (Gandini, Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa.,and the National Health Laboratory Service (Mampeule, Jugwanth, Gededzha, and Mayne), Johannesburg, South Africa
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3
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High-resolution HLA phased haplotype frequencies to predict the success of unrelated donor searches and clinical outcome following hematopoietic stem cell transplantation. Bone Marrow Transplant 2019; 54:1701-1709. [PMID: 30953025 PMCID: PMC7198472 DOI: 10.1038/s41409-019-0520-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/18/2019] [Indexed: 02/06/2023]
Abstract
HLA matching is a critical factor for successful allogeneic hematopoietic stem cell transplantation. For unrelated donor searches, matching is usually based on high-resolution typing at five HLA loci, looking for a 10/10 match. Some studies have proposed that further matching at the haplotype level could be beneficial for clinical outcome. In this study, we determined the phased haplotypes of 291 patients using family members and segregation analysis. The sum of ranks of the haplotypes carried by patients was used as a surrogate predictor of a successful unrelated donor search. The putative impact of haplotypes was then analyzed in a cohort of 211 recipients transplanted with 10/10 matched unrelated donors. A logistic regression analysis showed a highly significant effect of the haplotypes in the outcome of a search, but we did not find any significant effect on overall survival, graft versus host disease or relapse/progression following HSCT. This study provides useful data for the optimization of unrelated bone marrow donor searches, but does not confirm previous reports that matching at the haplotype level has a clinical impact following HSCT. Due to the extreme polymorphism of HLA genes, further studies are warranted to better understand the many factors at play.
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Snanoudj R, Kamar N, Cassuto E, Caillard S, Metzger M, Merville P, Thierry A, Jollet I, Grimbert P, Anglicheau D, Hazzan M, Choukroun G, Hurault De Ligny B, Janbon B, Vuiblet V, Devys A, Le Meur Y, Delahousse M, Morelon E, Bailly E, Girerd S, Amokrane K, Legendre C, Hertig A, Rondeau E, Taupin JL. Epitope load identifies kidney transplant recipients at risk of allosensitization following minimization of immunosuppression. Kidney Int 2019; 95:1471-1485. [PMID: 30955869 DOI: 10.1016/j.kint.2018.12.029] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 12/07/2018] [Accepted: 12/28/2018] [Indexed: 12/01/2022]
Abstract
Human leukocyte antigen (HLA) mismatching and minimization of immunosuppression are two major risk factors for the development of de novo donor-specific antibodies, which are associated with reduced kidney graft survival. Antibodies do not recognize whole HLA antigens but rather individual epitopes, which are short sequences of amino acids in accessible positions. However, compatibility is still assessed by the simple count of mismatched HLA antigens. We hypothesized that the number of mismatched epitopes, or ("epitope load") would identify patients at the highest risk of developing donor specific antibodies following minimization of immunosuppression. We determined epitope load in 89 clinical trial participants who converted from cyclosporine to everolimus 3 months after kidney transplantation. Twenty-nine participants (32.6%) developed de novo donor specific antibodies. Compared to the number of HLA mismatches, epitope load was more strongly associated with the development of donor specific antibodies. Participants with an epitope load greater than 27 had a 12-fold relative risk of developing donor-specific antibodies compared to those with an epitope load below that threshold. Using that threshold, epitope load would have missed only one participant who subsequently developed donor specific antibodies, compared to 8 missed cases based on a 6-antigen mismatch. DQ7 was the most frequent antigenic target of donor specific antibodies in our population, and some DQ7 epitopes appeared to be more frequently involved than others. Assessing epitope load before minimizing immunosuppression may be a more efficient tool to identify patients at the highest risk of allosensitization.
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Affiliation(s)
- Renaud Snanoudj
- Service de Néphrologie, Hémodialyse et Transplantation Rénale, Hôpital Foch, Suresnes, France; CESP, INSERM, Université Paris-Sud, UVSQ, Université Paris-Saclay, Villejuif, France.
| | - Nassim Kamar
- Service de Néphrologie et Transplantation d'organe, CHU Rangueil, Toulouse, France
| | | | - Sophie Caillard
- Service de Néphrologie et Transplantation, CHU de Strasbourg, Strasbourg, France
| | - Marie Metzger
- CESP, INSERM, Université Paris-Sud, UVSQ, Université Paris-Saclay, Villejuif, France
| | - Pierre Merville
- Service de Néphrologie et Transplantation, Hôpital Pellegrin, Bordeaux, France
| | - Antoine Thierry
- Service de Néphrologie et Transplantation, CHU de Poitiers, Poitiers, France
| | | | - Philippe Grimbert
- Service de Néphrologie et Transplantation, Hôpital Henri Mondor, Créteil, France
| | - Dany Anglicheau
- Service de Transplantation et Néphrologie, Hôpital Necker, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Marc Hazzan
- Service de Néphrologie, Hôpital Claude Huriez, CHRU de Lille, Lille, France
| | | | | | - Bénedicte Janbon
- Service de Néphrologie et Transplantation, CHU de Grenoble, Grenoble, France
| | - Vincent Vuiblet
- Service de Néphrologie, Hôpital Maison Blanche, Reims, France
| | - Anne Devys
- Etablissement français du sang - Centre Pays de Loire, Angers, France
| | - Yann Le Meur
- Service de Néphrologie, CHU de Brest, Brest, France
| | - Michel Delahousse
- Service de Néphrologie, Hémodialyse et Transplantation Rénale, Hôpital Foch, Suresnes, France
| | - Emmanuel Morelon
- Service de Transplantation, Néphrologie et Immunologie Clinique, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - Elodie Bailly
- Service de Néphrologie, Hôpital Bretonneau, CHU de Tours, Tours, France
| | - Sophie Girerd
- Service de Néphrologie, CHU Nancy Brabois, Nancy, France
| | - Kahina Amokrane
- Laboratoire d'Immunologie et Histocompatibilité Hôpital Saint-Louis, Paris, France; INSERM UMRs 1160, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris, France
| | - Christophe Legendre
- Service de Transplantation et Néphrologie, Hôpital Necker, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Alexandre Hertig
- Service de Néphrologie et Transplantation, Hôpital Tenon, Paris, France
| | - Eric Rondeau
- Service de Néphrologie et Transplantation, Hôpital Tenon, Paris, France
| | - Jean-Luc Taupin
- Laboratoire d'Immunologie et Histocompatibilité Hôpital Saint-Louis, Paris, France; INSERM UMRs 1160, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris, France
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5
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Hellmann DM, Radojska S, Fimmers R, Gathof BS. Probability of success in the search for a related bone marrow donor in Cologne, Germany using HLA-A, -B and -DRB1 haplotype frequencies. HLA 2018; 92:154-159. [PMID: 30054987 PMCID: PMC6749562 DOI: 10.1111/tan.13356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 07/04/2018] [Accepted: 07/23/2018] [Indexed: 12/12/2022]
Abstract
Between 2004 and 2013, 603 patients and their relatives (n = 1297) were typed as part of the search for a suitable HLA-matched donor in their nuclear and extended families at the central service provider for transfusion medicine at the University Hospital of Cologne. The high success rate in finding donors over the years at our center (38.1%) led us to examine our database retrospectively in order to evaluate the donor search and haplotype frequencies (HFs) in the sample. Our goal was to identify the factors contributing to this high success rate and also to compare the HFs we observed with other reported haplotype frequency estimations (HFE) for the Cologne area. Probability estimations for a successful donor search were constructed based on the HFEs for the sample.
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Affiliation(s)
- Daniel M Hellmann
- Transfusion Medicine, University Hospital of Cologne, Cologne, Germany
| | - Stela Radojska
- Transfusion Medicine, University Hospital of Cologne, Cologne, Germany
| | - Rolf Fimmers
- Institute of Medical Biometry, Informatics and Epidemiology (IMBIE), University of Bonn, Bonn, Germany
| | - Birgit S Gathof
- Transfusion Medicine, University Hospital of Cologne, Cologne, Germany
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6
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Dubois V, Detrait M, Sobh M, Morisset S, Labussière H, Giannoli C, Nicolini F, Moskovtchenko P, Mialou V, Ducastelle S, Rey S, Thomas X, Barraco F, Tedone N, Marry E, Garnier F, Bertrand Y, Michallet M. Using EasyMatch® to anticipate the identification of an HLA identical unrelated donor: A validated efficient time and cost saving method. Hum Immunol 2016; 77:1008-1015. [DOI: 10.1016/j.humimm.2016.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 02/16/2016] [Accepted: 02/18/2016] [Indexed: 02/01/2023]
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Jazairi B, Khansaa I, Ikhtiar A, Murad H. Frequency of HLA-DRB1 and HLA-DQB1 Alleles and Haplotype Association in Syrian Population. Immunol Invest 2016; 45:172-9. [PMID: 26853713 DOI: 10.3109/08820139.2015.1131293] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The study of Human Leukocyte Antigen (HLA) system is very important in health and diseases. As the HLA loci are the most polymorphic in the human genome, it plays a very important role in the immune responses to self and nonself antigens. In the light of the growing importance of typing the HLA alleles in transplantation, autoimmune diseases, cancer, and many other diseases, we studied 225 unrelated healthy Syrian subjects for their HLA class II genotypes in an attempt to reveal the distribution of the HLA (DRB1-DQB1) alleles in the general Syrian population. Our results revealed that the most common alleles for the DRB1 locus were DRB1*11 (26.4%), DRB1*04 (14%), and DRB1*07 (12%). However, the most frequent alleles for the DQB1 locus were DQB1*03 (40.9%) and DQB1*05 (25.1%). The frequent of two-locus haplotypes carry the most frequent alleles at these loci. The most frequently detected class II ''haplotypes'' are DRB1*11-DQB1*03 (8.9%), DRB1*01-DQB1*05 (3.6%), and DRB1*04-DQB1*03 (2.7%). Compared with other populations, our result, deduced from the analysis of genetic distances and the construction of neighbor-joining (NJ) dendrogram, and principal component analysis (PCA) indicates that Syrians are related to Middle Eastern populations. Our data about the Syrian population will aid researchers in studying the relation of HLA class II with different diseases in a Syrian population and will add to the available international literature associated with these loci.
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Affiliation(s)
- Batoul Jazairi
- a Molecular Biology and Biotechnology Department , Atomic Energy Commission , Damascus , Syria
| | - Issam Khansaa
- a Molecular Biology and Biotechnology Department , Atomic Energy Commission , Damascus , Syria
| | - Adnan Ikhtiar
- a Molecular Biology and Biotechnology Department , Atomic Energy Commission , Damascus , Syria
| | - Hossam Murad
- a Molecular Biology and Biotechnology Department , Atomic Energy Commission , Damascus , Syria
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Designing of Complex Multi-epitope Peptide Vaccine Based on Omps of Klebsiella pneumoniae: An In Silico Approach. Int J Pept Res Ther 2015. [DOI: 10.1007/s10989-015-9461-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Grubic Z, Burek Kamenaric M, Mikulic M, Stingl Jankovic K, Maskalan M, Zunec R. HLA-A, HLA-B and HLA-DRB1 allele and haplotype diversity among volunteer bone marrow donors from Croatia. Int J Immunogenet 2014; 41:211-21. [PMID: 24762167 DOI: 10.1111/iji.12117] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 02/09/2014] [Accepted: 02/23/2014] [Indexed: 01/01/2023]
Abstract
The determination of human leucocyte antigen (HLA)-A, HLA-B and HLA-DRB1 alleles in the routine procedure of a volunteer hematopoietic stem cell (HSC) donor's registration in the Croatian Bone Marrow Donor Registry (CBMDR) is performed to enhance the odds of finding a suitable HLA compatible donor for patients in need of a HSC transplantation worldwide. However, besides its original purpose, it also provides valuable information about the HLA polymorphism among Croats. The aim of the present study was to analyse the HLA allele and haplotype frequencies in a sample of 4000 donors from CBMDR. The distribution of HLA-A, HLA-B and HLA-DRB1 alleles did not demonstrate significant differences from the data reported for other European populations. The higher frequency of B*40:02 allele in comparison with B*40:01 and DRB1*11:04 in comparison with DRB1*11:01 is interesting because it represents a difference in comparison with the Western and Northern European populations which are a main source of donors for Croatian patients. The haplotype frequencies show a greater variation and difference in comparison with data from other registries and populations; however, due to a lack of high-resolution haplotype data, comparison was possible only with a very limited number of other populations.
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Affiliation(s)
- Z Grubic
- Tissue Typing Center, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia
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Testi M, Andreani M, Locatelli F, Arcese W, Troiano M, Battarra M, Gaziev J, Lucarelli G. Influence of the HLA characteristics of Italian patients on donor search outcome in unrelated hematopoietic stem cell transplantation. ACTA ACUST UNITED AC 2014; 84:198-205. [DOI: 10.1111/tan.12355] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/11/2014] [Accepted: 03/19/2014] [Indexed: 11/28/2022]
Affiliation(s)
- M. Testi
- Laboratory of Immunogenetics and Transplant Biology; IME Foundation at Polyclinic of Tor Vergata; Rome Italy
| | - M. Andreani
- Laboratory of Immunogenetics and Transplant Biology; IME Foundation at Polyclinic of Tor Vergata; Rome Italy
| | - F. Locatelli
- Department of Pediatric Hematology-Oncology, IRCCS Bambino Gesù Children's Hospital; University of Pavia; Rome Italy
| | - W. Arcese
- Rome Transplant Network, Department of Hematology, Stem Cell Transplant Unit; Tor Vergata University; Rome Italy
| | - M. Troiano
- Laboratory of Immunogenetics and Transplant Biology; IME Foundation at Polyclinic of Tor Vergata; Rome Italy
| | - M. Battarra
- Laboratory of Immunogenetics and Transplant Biology; IME Foundation at Polyclinic of Tor Vergata; Rome Italy
| | - J. Gaziev
- Rome Transplant Network, Department of Hematology, Stem Cell Transplant Unit; Tor Vergata University; Rome Italy
| | - G. Lucarelli
- International Center for Transplantation in Thalassemia and Sickle Cell Anemia; IME Foundation at Polyclinic of Tor Vergata; Rome Italy
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Wang Y, Aïssi-Rothe L, Virion JM, De Carvalho Bittencourt M, Ulas N, Audonnet S, Salmon A, Clement L, Venard V, Jeulin H, Stoltz JF, Decot V, Bensoussan D. Combination of Epstein-Barr virus nuclear antigen 1, 3 and lytic antigen BZLF1 peptide pools allows fast and efficient stimulation of Epstein-Barr virus-specific T cells for adoptive immunotherapy. Cytotherapy 2013; 16:122-34. [PMID: 24094498 DOI: 10.1016/j.jcyt.2013.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 06/10/2013] [Accepted: 07/23/2013] [Indexed: 12/18/2022]
Abstract
BACKGROUND Epstein-Barr virus (EBV) infection is a major cause of morbidity following hematopoietic stem cell transplantation. EBV-infected B cells may not respond to rituximab treatment and may lead to a life-threatening post-transplantation lymphoproliferative disorder. Adoptive cellular immunotherapy using EBV-lymphoblastoid cell lines (LCL) as stimulating antigen has proved effective in restoring specific immunity. However, EBV presents several immunodominant antigens, and developing a swift and effective clinical-grade immunotherapy relies on the definition of a Good Manufacturing Practices (GMP) universal stimulating antigen. METHODS Peripheral blood mononuclear cells (PBMCs) from six donors with a cellular immune response against EBV were immunoselected after stimulation with a new EBV antigen associated with an EBNA3 peptide pool. RESULTS After immunoselection, a mean of 0.53 ± 0.25 × 10⁶ cells was recovered consisting of a mean of 24.77 ± 18.01% CD4⁺-secreting interferon (IFN)-γ and 51.42 ± 26.92% CD8⁺-secreting IFN-γ. The T memory stem cell sub-population was identified. EBV-specific T cells were expanded in vitro, and their ability to secrete IFN-γ and to proliferate after re-stimulation with EBV antigen was confirmed. A specific lysis was observed against autologous target cells pulsed with EBV peptide pools (57.6 ± 11.5%) and against autologous EBV-LCL (18.3 ± 7.3%). A mean decrease of 94.7 ± 3.3% in alloreactivity against third-party donor mononuclear cells with EBV-specific T cells was observed compared with PBMCs before selection. CONCLUSIONS Our results show that a combination of peptide pools including EBNA3 is needed to generate EBV-specific T cells with good specific cytotoxicity and devoid of alloreactivity, but as yet GMP grade is not fully achieved.
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Affiliation(s)
- Yingying Wang
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France; CNRS, UMR 7365 et FR 3209, Faculté de Médecine, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Lamia Aïssi-Rothe
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France; CNRS, UMR 7365 et FR 3209, Faculté de Médecine, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Jean Marc Virion
- CHU de Nancy, Epidémiologie et Evaluation Cliniques, Vandoeuvre-lès-Nancy, France
| | | | - Neslihan Ulas
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France
| | - Sandra Audonnet
- CHU de Nancy, Laboratoire d'Immunologie et Plateforme Nancytomique, Vandoeuvre-lès-Nancy, France
| | | | | | - Veronique Venard
- CHU de Nancy, Laboratoire de Virologie, Vandoeuvre-lès-Nancy, France
| | - Helène Jeulin
- CHU de Nancy, Laboratoire de Virologie, Vandoeuvre-lès-Nancy, France
| | - Jean-François Stoltz
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France; CNRS, UMR 7365 et FR 3209, Faculté de Médecine, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Veronique Decot
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France; CNRS, UMR 7365 et FR 3209, Faculté de Médecine, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - Danièle Bensoussan
- CHU de Nancy, Unité de Thérapie Cellulaire et Tissus, Vandoeuvre-lès-Nancy, France; CNRS, UMR 7365 et FR 3209, Faculté de Médecine, Université de Lorraine, Vandoeuvre-lès-Nancy, France; Faculté de Pharmacie, Département de Microbiologie-Immunologie, Université de Lorraine, Nancy Cedex, France.
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12
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HLA class II high-resolution genotyping in Greek children with celiac disease and impact on disease susceptibility. Pediatr Res 2012; 72:625-30. [PMID: 23041663 DOI: 10.1038/pr.2012.133] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Celiac disease (CD) has been associated with HLA class II heterodimers. This study aimed at determining the HLA genotypic and allelic distribution in Greek children with CD as compared with the general population. METHODS A total of 118 children with CD and 120 healthy individuals serving as controls were included in the study. RESULTS Higher frequencies for HLA-DQB1*02:01 (40.25 vs. 9.58%, P < 0.001) and DQB1*02:02 (20.34 vs. 5.42%, P < 0.001) were observed in patients with CD, whereas HLA-DQB1*03:01 (16.53 vs. 30.42%, P < 0.001), DQB1*05:01 (0.85 vs. 10%, P < 0.001), and DQB1*05:02 (5.51 vs. 17.92%, P < 0.001) were significantly lower, as compared with the controls. DQA1*02:01 (patients with CD vs. controls: 20.76 vs. 6.67%, P < 0.001) and DQA1*05:01 (40.25 vs. 9.58%, P < 0.001) were significantly more frequent in patients. The frequencies of HLA-DQA1* 01:01, *01:02, *01:04, and *05:05 were significantly lower in patients (P < 0.001). The haplotype mainly associated with CD was DRB1*03-DQB1*02:01-DQA1*05:01; patients with CD vs. controls: 39.83 vs. 9.58%, P < 0.001. In total, 84.75% of patients carried DQ2 (vs. 21.67% in controls, P < 0.001), whereas 11.02% were DQ8 positive/DQ2 negative. CONCLUSION This study confirms the existing data and provides additional evidence supporting a strong genetic predisposition for CD associated with the class II alleles DQB1*02 and DQA1*05 encoding the serological specificity DQ2.
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13
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Jöris MM, Lankester AC, von dem Borne PA, Kuball J, Bierings M, Cornelissen JJ, Groenendijk-Sijnke ME, van der Holt B, Haasnoot GW, van der Zanden HGM, van Walraven SM, van Rood JJ, Claas FHJ, Oudshoorn M. The impact of frequent HLA haplotypes in high linkage disequilibrium on donor search and clinical outcome after unrelated haematopoietic SCT. Bone Marrow Transplant 2012; 48:483-90. [PMID: 23064039 DOI: 10.1038/bmt.2012.189] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The MHC region on chromosome 6 contains a large number of non-HLA genes next to the HLA genes. Matching for HLA in unrelated hematopoietic SCT (HSCT) does not necessarily mean that these non-HLA genes are also matched. We selected 348 Northwest European patients transplanted with an HLA-A-, -B-, -C-, -DRB1-, -DQB1-matched unrelated donor (MUD) between 1987 and 2008. Patients' haplotypes were identified via descend. We were unable to determine the haplotypes of the donor; therefore we used frequent haplotypes (FH) in high linkage disequilibrium (LD) as a proxy for haplotype matching. Presence of a FH in a patient positively affected the probability and speed of identifying a matched unrelated donor. Competing risk survival analysis showed that patients with one or two FH have a statistically significantly decreased probability of developing ≥ grade II acute GVDH (aGVHD) without increased risk of relapse compared to patients without FH (HR (95% CI): 0.53 (0.31-0.91)). This association was strongest for those FH with the highest LD between both HLA-A and -C or -B, and HLA-C or -B and -DRB1 (HR (95% CI): 0.49 (0.26-0.92)). These results extend evidence that non-HLA allele coding regions have a significant impact on development of ≥ grade II aGVHD. We conclude that there is more to successful HSCT than matching for HLA genes.
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Affiliation(s)
- M M Jöris
- Europdonor Foundation, Leiden, The Netherlands.
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14
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Grubic Z, Stingl K, Zunec R. Heterogeneity of HLA-DRB1*04 alleles and haplotypes in the Croatian population. ACTA ACUST UNITED AC 2012; 80:219-23. [PMID: 22881058 DOI: 10.1111/j.1399-0039.2012.01917.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Analysis of allele distribution at the HLA-DRB1*04 gene, as one of the frequent ones among Croatians, and their HLA-A-B-DRB1 haplotypes in the Croatian population was performed in this study. Using LABType® SSO and PCR-SSP method, 11 DRB1*04 subtypes were observed, of which DRB1*04:01 was the most frequent (28.0%) followed by DRB1*04:02 (26.3%), DRB1*04:03 (22.3%), and DRB1*04:04 (14.2%). The significant haplotypes (with highest P value) for given DRB1*04 allele were the following combinations: HLA-B*15:01-DRB1*04:01, HLA-B*38:01-DRB1*04:02, HLA-B*35:03-DRB1*04:03, HLA-B*35:03-DRB1*04:08, HLA-B*14:01-DRB1*04:04, and HLA-B*49-DRB1*04:05. Marked differences in the distribution of our most frequent haplotypes of HLA-B-DRB1*04 (HLA-B*38:01-DRB1*04:02 and HLA-B*15:01-DRB1*04:01) were found in comparison to other European populations investigated so far. Additionally, comparison of HLA-A-B-DRB1*04 haplotypes showed that although there are similarities in the haplotype structure between our and other populations, there are also noteworthy differences. In summary, the identification of conserved and unusual DRB1*04 haplotypes in the present study of Croats should have important clinical implications for donor-recipient matching in the hematopoietic stem cell transplantation program, help in the understanding of HLA polymorphisms in different European populations, and also prove to be very useful in the determination of possible susceptibility genes involved in HLA-DRB1*04-associated diseases.
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Affiliation(s)
- Z Grubic
- Clinical Unit for Tissue Typing, Clinical Department for Transfusion Medicine and Transplantation Biology, University Hospital Centre Zagreb, Zagreb, Croatia.
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15
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The distribution of human leukocyte antigen-A, -B, and -DRB1 alleles and haplotypes based on high-resolution genotyping of 167 families from Jiangsu Province, China. Hum Immunol 2011; 72:872-6. [PMID: 21762744 DOI: 10.1016/j.humimm.2011.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 05/27/2011] [Accepted: 06/27/2011] [Indexed: 10/18/2022]
Abstract
We investigated the human leukocyte antigen (HLA)-A, -B, and -DRB1 allele frequencies, the A-B-DRB1, A-B, B-DRB1, and A-DRB1 haplotype frequencies, and the characteristics of linkage disequilibrium between 2 loci in high resolution based on 167 unrelated families from Jiangsu Province, China. A total of 26 alleles at the A locus, 55 alleles at the B locus, and 34 alleles at the DRB1 locus were reported in this study. The top 5 most frequent HLA alleles at the HLA-A, -B, and -DRB1 loci, respectively, were A*11:01, A*24:02, A*02:01, A*33:03, A*30:01; B*13:02, B*40:01 B*46:01, B*58:01, B*54:01; DRB1*09:01, DRB1*07:01, DRB1*12:02, DRB1*15:01, and DRB1*08:03. Several haplotypes with high frequencies were deduced in this study. The top 3 most common A-B-DRB1 haplotypes observed were A*30:01-B*13:02-DRB1*07:01, A*33:03-B*58:01-DRB1*03:01, and A*02:07-B*46:01-DRB1*09:01. The top 3 most common A-B haplotypes were A*30:01-B*13:02, A*33:03-B*58:01, and A*02:07-B*46:01. The top 4 most common A-DRB1 haplotypes were A*30:01-DRB1*07:01, A*33:03-DRB1*13:02, A*24:02-DRB1*09:01, and A*33:03-DRB1*03:01. Finally, the top 3 most common B-DRB1 haplotypes were B*13:02-DRB1*07:01, B*46:01-DRB1*09:01, and B*58:01-DRB1*03:01. From the linkage disequilibrium calculation, the most prominent associations were A*30:01-B*13:02, B*13:02-DRB1*07:01, and A*01:03-DRB1*01:02. These allele and haplotype frequencies could be useful for finding the best matched donors for patients in the China Marrow Donor Program Jiangsu Branch.
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16
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Balas A, García-Sánchez F, Vicario JL. Allelic and haplotypic HLA frequency distribution in Spanish hematopoietic patients. Implications for unrelated donor searching. ACTA ACUST UNITED AC 2011; 77:45-53. [PMID: 21155721 DOI: 10.1111/j.1399-0039.2010.01578.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Histocompatibility criteria for unrelated donor selection are based on high-resolution definition of HLA genes. In spite of the expansion of the unrelated donor registries, HLA matching remains a problem for many patients because of the great diversity of HLA alleles and haplotypes. The availability of matched donors at an allelic level depends on the frequency of the patient's alleles and haplotypes. Therefore, data regarding HLA distribution for each population are needed in order to evaluate the donor searching approach and, may be, even the therapeutic strategy. In the present report, we have analyzed 253 haematological Spanish patients awaiting unrelated haematopoietic stem cell (HSC) donors. HLA allele and haplotype frequencies have been defined at high resolution for the first time in this population. Significant differences in HLA distribution have been reported when comparing two patient groups, one that received full-match (10/10) unrelated donors and one that did not. Factors like rare alleles, presence of B*510101 (because of the association with multiple HLA-C alleles), as well as infrequent B-C and DRB1-DQB1 associations, showed a negative value for finding a suitable donor, whereas the presence of one of the six-gene haplotypes with a frequency ≥ 0.9% in our sample was a positive factor influencing donor searching. These differences will be useful in donor searching advising and in the use of different therapeutic strategies.
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Affiliation(s)
- A Balas
- Departamento de Histocompatibilidad, Centro de Transfusión de la Comunidad de Madrid, Madrid, Spain.
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17
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Canossi A, Piancatelli D, Aureli A, Oumhani K, Ozzella G, Del Beato T, Liberatore G, El Aouad R, Adorno D. Correlation between genetic HLA class I and II polymorphisms and anthropological aspects in the Chaouya population from Morocco (Arabic speaking). ACTA ACUST UNITED AC 2010; 76:177-93. [PMID: 20492599 DOI: 10.1111/j.1399-0039.2010.01498.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The aim of this study was to provide genetic and anthropological information on the Chaouya (CH), an Arabic-speaking population living in West Morocco, Atlantic coast (Settat). In 98 unrelated healthy CH volunteers, we first investigated the human leukocyte antigen (HLA) class I and II allele polymorphisms using a sequence-based typing method and examined haplotypes and relatedness of this group to other African and Mediterranean populations. The study showed the close relatedness with Tunisian population and other North Africans, together with a strong influence of various immigrations, mainly Spaniards, French, and Portuguese, as expected. Nevertheless, analysis of class II allele frequencies (afs) showed that Oromo and Amhara Ethiopian groups cluster together with the Berbers and other North Africans, confirming the relationship between these populations (Afro-Asiatic linguistic group, Hamites). South and sub-Saharan Africans cluster separately at a great distance from CH, except the sub-Saharan Bantu population from Congo Kinshasa, which shows a relatively close genetic relationship ascribable to the effect of a diversifying selection. On the other hand, considering HLA class I afs analyses, it was noteworthy that CH grouped together with sub-Saharans, showing a close genetic distance mainly with Ugandas and Kenians Luo.
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Affiliation(s)
- A Canossi
- CNR Institute Organ Transplants and Immunocitology, L'Aquila, Italy.
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18
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Bettens F, Nicoloso de Faveri G, Tiercy JM. HLA-B51 and haplotypic diversity of B-Cw associations: implications for matching in unrelated hematopoietic stem cell transplantation. ACTA ACUST UNITED AC 2009; 73:316-25. [PMID: 19317740 DOI: 10.1111/j.1399-0039.2009.01215.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In unrelated hematopoietic stem cell transplantation (HSCT), human leukocyte antigen (HLA)-C locus incompatibilities occur frequently and are associated with increased risk of posttransplant complications. Because HLA-B51 is associated with a high rate of Cw disparities, we performed a comprehensive four-digit typing analysis of 140 ABCDRB1 B51 genotypes proven by pedigree analysis and 311 unrelated donors selected for 75 B51-positive patients. In addition, 145 A1/Ax-B8/B51-DR3/DRx donors were HLA typed at a high-resolution level and tested for three microsatellite (Msat) polymorphisms located in the HLA class I and III regions. Based on these data sets, 182 different ABCDR haplotypes with 14 different B-Cw associations were detected. Rates of Cw mismatches were shown to be highly correlated with the ABDRB1 haplotypes. We have computed 21 B51 haplotypes that disclose a high probability of HLA-C allele matching and 30 haplotypes with a low (<25%) probability. The HLA-C allele frequency profiles were quite different in these two groups, with a more heterogeneous distribution in the low matching probability group. HLA-Cw*1502 was inversely correlated with the likelihood to identify a Cw-mismatched donor: it was present in 61% of the high vs 18% of the low probability group (P < 0.0001). The analysis of three Msats in the class I and III regions showed a higher allelic diversity in B51-positive haplotypes compared with the conserved A1-B8-DR3 haplotype. HLA-B51 haplotypes therefore exhibit a high diversity at the level of B-Cw associations and of non-HLA polymorphisms in the class I and III regions. Such heterogeneity negatively impacts on overall matching in HSCT.
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Affiliation(s)
- F Bettens
- Transplantation Immunology Unit, National Reference Laboratory for Histocompatibility, University Hospital, 24 rue Micheli-du-Crest, Geneva, Switzerland
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19
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Prediction of duration and success rate of unrelated hematopoietic stem cell donor searches based on the patient's HLA-DRB1 allele and DRB1-DQB1 haplotype frequencies. Bone Marrow Transplant 2009; 44:433-40. [PMID: 19290000 DOI: 10.1038/bmt.2009.53] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Rapid identification of a matched unrelated donor is essential for patients in need of hematopoietic SCT. We carried out a retrospective evaluation of 549 unrelated donor searches (UDSs), which were completed in 2005 for 23 German transplant centers. On the basis of the patient's HLA-DRB1 allele and DRB1-DQB1 haplotype frequencies, UDSs were divided into four groups with different search success probability predictions. For 90.5% of the patients, an acceptable HLA-matched, and for 61.6% an HLA-A-B-Cw-DRB1-DQB1-identical (10/10 matched) unrelated donor was found. The median search duration was 22 days. In the groups with high (n = 318), medium (n = 157), low (n = 56) and very low (n = 18) UDS success probability, an acceptable donor was found for 99.1, 86.6, 75.0 and 22.2% of the patients, and a 10/10-matched donor was found for 78.3, 49.7, 17.9 and 4.5% of the patients, respectively. The median search duration was 20, 27, 45 and 477 days in the groups with high, medium, low and very low probability, respectively. The search success rate and duration can be predicted on the basis of the patient's HLA-DRB1 allele and HLA-DRB1-DQB1 haplotype frequencies. An unrelated donor can be found for most of the patients, even if the indication for transplantation is urgent.
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Abstract
The identification of the novel human leukocyte antigen (HLA)-B*4207 allele, which was found in a blood donor of Caucasian origin, is described. The sequence of the new allele differs from HLA-B*4201 in three nucleotide substitutions in exon 2, resulting in three consecutive amino acid (AA) exchanges at position 69, 70, and 71. AA positions 69 and 70 affect the peptide-binding site of the HLA molecule in the formation of pockets A, B, and C. Therefore, it is likely that the peptide-binding motif of HLA-B*4207 differs from the HLA-B*4201 motif. HLA-B*4207 exhibits a high level of structural homology to HLA-B*08 alleles as well as to HLA-B*4201. Rating of the AA variations of these alleles according to the AA distance matrix score gives the lowest overall matching score between the HLA-B*4207 and the HLA-B*0801 alleles, indicating a high functional similarity. To further address this, homology modeling was performed using B8 as the closest structural template. The portion of the molecule that is accessible to the T-cell receptor and antibodies is identical between B*4207 and B*0801. Under consideration of allele frequencies, close inspection of these sequences shows that the new allele is most likely a result of a recombination involving B*0702 and B*0801. Unfortunately, patient consent could not be obtained for retrospective serological typing to definitively determine whether B*4207 reacts in the B8 serological group.
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Affiliation(s)
- B Eiz-Vesper
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
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21
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Tiercy JM, Nicoloso G, Passweg J, Schanz U, Seger R, Chalandon Y, Heim D, Güngör T, Schneider P, Schwabe R, Gratwohl A. The probability of identifying a 10/10 HLA allele-matched unrelated donor is highly predictable. Bone Marrow Transplant 2007; 40:515-22. [PMID: 17646842 DOI: 10.1038/sj.bmt.1705787] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Identification of an unrelated HLA allele-matched hematopoietic stem cell (HSC) donor is a costly and time-consuming procedure. To improve search logistics, we have limited the search period to 6 months and have introduced a probability estimate of the chances of identifying a 10/10 HLA allele-matched donor. Probabilities were classified as high (>95%), intermediate (50%) and low (<5% chance) based on allele and haplotype frequencies. By analyzing 350 consecutive searches between 2002 and 2005 (1719 donors tested), the probability estimates turned out to be correct for 96% (high), 88% (low) and 56% (intermediate) patients. For searches with a high probability of success, at least one of the 10 most frequent haplotypes in Caucasoids was found in 69% of the patients, but in only 11% of the patients with a low-probability estimate (P<0.00001). Survival probability at 3 years was significantly higher for HSCT patients classified with a high-probability estimate when compared to patients in the intermediate/low-probability groups (74 vs 51 and 54% respectively, P=0.01). The same difference in survival probabilities was observed when only 10/10 matched unrelated HSCT patients were analyzed. In the intermediate-/low-probability groups, patients with alternative (haploidentical, autologous) or mismatched unrelated donors had similar survival estimates. Probability prediction is therefore feasible in the search process for unrelated donors and can guide the therapeutic strategy.
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Affiliation(s)
- J-M Tiercy
- Department of Internal Medicine, National Reference Laboratory for Histocompatibility, University Hospital, Geneva, Switzerland.
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Alvarez I, Carrascal M, Canals F, Muixí L, Abián J, Jaraquemada D. Analysis of the HLA class I associated peptide repertoire in a hepatocellular carcinoma cell line reveals tumor-specific peptides as putative targets for immunotherapy. Proteomics Clin Appl 2007; 1:286-98. [DOI: 10.1002/prca.200600388] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Mueller SM, Schaetz B, Eismann K, Bergmann S, Bauerle M, Schmitt-Haendle M, Walter H, Schmidt B, Korn K, Sticht H, Spriewald B, Harrer EG, Harrer T. Dual selection pressure by drugs and HLA class I-restricted immune responses on human immunodeficiency virus type 1 protease. J Virol 2007; 81:2887-98. [PMID: 17202219 PMCID: PMC1866003 DOI: 10.1128/jvi.01547-06] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
To determine the influence of human immunodeficiency virus type 1 (HIV-1)-specific CD8+ T cells on the development of drug resistance mutations in the HIV-1 protease, we analyzed protease sequences from viruses from a human leukocyte antigen class I (HLA class I)-typed cohort of 94 HIV-1-positive individuals. In univariate statistical analyses (Fisher's exact test), minor and major drug resistance mutations as well as drug-associated polymorphisms showed associations with HLA class I alleles. All correlations with P values of 0.05 or less were considered to be relevant without corrections for multiple tests. A subset of these observed correlations was experimentally validated by enzyme-linked immunospot assays, allowing the definition of 10 new epitopes recognized by CD8+ T cells from patients with the appropriate HLA class I type. Several drug resistance-associated mutations in the protease acted as escape mutations; however, cells from many patients were still able to generate CD8+ T cells targeting the escape mutants. This result presumably indicates the usage of different T-cell receptors by CD8+ T cells targeting these epitopes in these patients. Our results support a fundamental role for HLA class I-restricted immune responses in shaping the sequence of the HIV-1 protease in vivo. This role may have important clinical implications both for the understanding of drug resistance pathways and for the design of therapeutic vaccines targeting drug-resistant HIV-1.
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Affiliation(s)
- Sandra M Mueller
- Immunodeficiency Center of the Department of Medicine III, University Hospital Erlangen, Krankenhausstrasse 12, 91054 Erlangen, Germany.
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24
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Pédron B, Yakouben K, Guérin V, Borsali E, Auvrignon A, Landman J, Alberti C, Leverger G, Baruchel A, Sterkers G. HLA alleles and haplotypes in French North African immigrants. Hum Immunol 2006; 67:540-50. [PMID: 16829309 DOI: 10.1016/j.humimm.2005.10.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2005] [Revised: 09/27/2005] [Accepted: 10/10/2005] [Indexed: 11/25/2022]
Abstract
Human leukocyte antigen (HLA) haplotypes (n = 187) were genotyped and assigned by the mode of inheritance in migrant families from North Africa who reside in the Paris, France, area. The distribution of alleles and haplotypes in that population was compared with the one obtained in a control population of ancient French natives residing in the same area (248 independent haplotypes also assigned by the mode of inheritance were studied). The results in migrants reveal the following: (1) a higher diversity in the distribution of HLA-A and -DRB1 alleles; (2) lower frequencies of alleles common in our region, such as A*0201 B*1501, B*4001, and DRB1*0401 and increased frequencies of minor subtypes, such as A*3002 and DRB1*0402; and (3) distinct distributions of B/Cw, DRB1/DQB1 or B/Cw/DRB1/DQB1 haplotypes. The results also revealed that the four most frequent five-allele haplotypes in controls i.e., HLA-A*0101/B*0801/Cw*0701/DRB1*0301/DQB1*0201; A*0301/B*0702/Cw*0702/DRB1*1501/DQB1*0602 (both of Indo-Celtic origin); A*2902/B*4403/Cw*1601/DRB1*0701/DQB1*0202 (frequent in Western-Europeans); and A*0201/B*1501/Cw*0304/DRB1*0401/DQB1*0302, represent 10.5% of the total haplotypes in controls but 1.6% in North Africans. Conversely, 9 five-allele haplotypes in multiple copy in North Africans (among which A*3002/B*1801/Cw*0501/DRB1*0301/DQB1*0201 of Paleo-North African origin and A*0201/B*0702/Cw*0702/DRB1*1501/DQB1*0602 of ancient European and Paleo-North African origin) represent 9.6% of the total haplotypes in North Africans but 2.4% in controls. These results thus suggest a low degree of admixture between the two populations.
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Affiliation(s)
- Béatrice Pédron
- Laboratory of Immunology, Hôpital Robert Debré, Paris, France
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