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Jordier F, Gras D, De Grandis M, D'Journo XB, Thomas PA, Chanez P, Picard C, Chiaroni J, Paganini J, Di Cristofaro J. HLA-H: Transcriptional Activity and HLA-E Mobilization. Front Immunol 2020; 10:2986. [PMID: 32010122 PMCID: PMC6978722 DOI: 10.3389/fimmu.2019.02986] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/05/2019] [Indexed: 01/25/2023] Open
Abstract
Little attention is paid to pseudogenes from the highly polymorphic HLA genetic region. The pseudogene HLA-H is defined as a non-functional gene because it is deleted at different frequencies in humans and because it encodes a potentially non-functional truncated protein. However, different studies have shown HLA-H transcriptional activity. We formerly identified 13 novel HLA-H alleles, including the H*02:07 allele, which reaches 19.6% in East Asian populations and encodes a full-length HLA protein. The aims of this study were to explore the expression and possible function of the HLA-H molecule. HLA-H may act as a transmembrane molecule and/or indirectly via its signal peptide by mobilizing HLA-E to the cell surface. We analyzed HLA-H RNA expression in Peripheral Blood Mononuclear Cells (PBMC), Human Bronchial Epithelial Cells (HBEC), and available RNA sequencing data from lymphoblastoid cell lines, and we looked to see whether HLA-E was mobilized at the cell surface by the HLA-H signal peptide. Our data confirmed that HLA-H is transcribed at similar levels to HLA-G. We characterized a hemizygous effect in HLA-H expression, and expression differed according to HLA-H alleles; most interestingly, the HLA-H*02:07 allele had the highest level of mRNA expression. We showed that HLA-H signal peptide incubation mobilized HLA-E molecules at the cell surface of T-Lymphocytes, monocytes, B-Lymphocytes, and primary epithelial cells. Our results suggest that HLA-H may be functional but raises many biological issues that need to be addressed.
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Affiliation(s)
- François Jordier
- Aix-Marseille University, CNRS, EFS, ADES, “Biologie des Groupes Sanguins”, Marseille, France
- Etablissement Français du Sang PACA Corse, Marseille, France
| | - Delphine Gras
- Aix-Marseille University, INSERM, INRA, C2VN, Marseille, France
| | - Maria De Grandis
- Aix-Marseille University, CNRS, EFS, ADES, “Biologie des Groupes Sanguins”, Marseille, France
- Etablissement Français du Sang PACA Corse, Marseille, France
| | - Xavier-Benoît D'Journo
- Department of Thoracic Surgery, North Hospital, Aix-Marseille University & Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Pascal-Alexandre Thomas
- Department of Thoracic Surgery, North Hospital, Aix-Marseille University & Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Pascal Chanez
- Aix-Marseille University, INSERM, INRA, C2VN, Marseille, France
- Clinique des Bronches, Allergie et Sommeil, North Hospital, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Christophe Picard
- Aix-Marseille University, CNRS, EFS, ADES, “Biologie des Groupes Sanguins”, Marseille, France
- Etablissement Français du Sang PACA Corse, Marseille, France
| | - Jacques Chiaroni
- Aix-Marseille University, CNRS, EFS, ADES, “Biologie des Groupes Sanguins”, Marseille, France
- Etablissement Français du Sang PACA Corse, Marseille, France
| | | | - Julie Di Cristofaro
- Aix-Marseille University, CNRS, EFS, ADES, “Biologie des Groupes Sanguins”, Marseille, France
- Etablissement Français du Sang PACA Corse, Marseille, France
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Xu YP, Wieten L, Wang SX, Cai Y, Olieslagers T, Zhang L, He LM, Tilanus MGJ, Hong WX. Clinical significance of HLA-E genotype and surface/soluble expression levels between healthy individuals and patients with acute leukemia. Leuk Lymphoma 2019; 60:208-215. [PMID: 29969046 DOI: 10.1080/10428194.2018.1474521] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 04/03/2018] [Accepted: 04/30/2018] [Indexed: 01/09/2023]
Abstract
Human leukocyte antigen (HLA)-E is a nonclassical HLA molecule with limited polymorphisms. Genotype frequency and expression of HLA-E were examined here for the first time in acute leukemia patients and healthy controls. The frequency of HLA-E*01:03/*01:03 individuals was significantly higher (p = .008, OR = 1.845), while the frequency of HLA-E*01:01/*01:01 individuals was much lower in the patient group (p = .002, OR = .363) than in control group. The surface expression on HLA-E*01:03/*01:03 individuals was found to be significantly higher than on HLA-E*01:01/*01:01 individuals in both of acute leukemia and control groups, but no significant difference was observed between the corresponding genotypes in two groups. However, the level of expression of soluble HLA-E is significantly higher in patients than in the control group, but there was no genotype-specific expression in either group. These findings indicate that soluble HLA-E secretion and HLA-E*01:03/*01:03 genotype that brings higher surface expression might play important roles in the mechanisms underlying tumor escape in acute leukemia.
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Affiliation(s)
- Yun-Ping Xu
- a Immunogenetics Laboratory , Shenzhen Institute of Transfusion Medicine, Shenzhen Blood Center , Shenzhen , China
- b Transplantation Immunology, Tissue Typing Laboratory , Maastricht University Medical Center , Maastricht , The Netherlands
| | - Lotte Wieten
- b Transplantation Immunology, Tissue Typing Laboratory , Maastricht University Medical Center , Maastricht , The Netherlands
| | - Song-Xing Wang
- a Immunogenetics Laboratory , Shenzhen Institute of Transfusion Medicine, Shenzhen Blood Center , Shenzhen , China
| | - Yun Cai
- c Department of Hematopathology , Shenzhen Second People's Hospital , Shenzhen , China
| | - Timo Olieslagers
- b Transplantation Immunology, Tissue Typing Laboratory , Maastricht University Medical Center , Maastricht , The Netherlands
| | - Li Zhang
- a Immunogenetics Laboratory , Shenzhen Institute of Transfusion Medicine, Shenzhen Blood Center , Shenzhen , China
| | - Liu-Mei He
- a Immunogenetics Laboratory , Shenzhen Institute of Transfusion Medicine, Shenzhen Blood Center , Shenzhen , China
| | - Marce G J Tilanus
- b Transplantation Immunology, Tissue Typing Laboratory , Maastricht University Medical Center , Maastricht , The Netherlands
| | - Wen-Xu Hong
- a Immunogenetics Laboratory , Shenzhen Institute of Transfusion Medicine, Shenzhen Blood Center , Shenzhen , China
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3
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Goel R, Kabeerdoss J, Mohan H, Danda S, Jayaseelan V, Kumar TS, Jude J, Bacon P, Joseph G, Danda D. Soluble-HLA-E: A follow up biomarker in Takayasu arteritis, independent of HLA-E genotype. Int J Rheum Dis 2018; 21:532-540. [PMID: 28425192 DOI: 10.1111/1756-185x.13027] [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] [Indexed: 11/28/2022]
Abstract
AIM Disease activity assessment in Takayasu arteritis (TA) is challenging. Human leukocyte antigen E (HLA-E) is shed from endothelium into serum as a soluble molecule (sHLA-E) in response to inflammation. We aimed to study: (i) utility of sHLA-E as a biomarker of disease activity; and (ii) association of HLA-E polymorphism rs1264457 with clinical disease in Asian-Indian TA patients. MATERIALS AND METHODS In phase-1, sHLA-E levels were estimated in sera of 50 consecutive TA patients at baseline visit and 27 healthy controls. Serial estimations were performed in 27 of them. In phase-2, DNA of 150 TA patients and 264 healthy controls were genotyped for rs1264457 polymorphism. RESULTS At baseline visit, disease was classified as active, stable and grumbling in 23, 18 and nine patients, respectively. sHLA-E levels were higher in active TA (43; interquartile range [IQR]: 25.3-64.6) pg/mL) than stable disease (12.9; IQR: 7.6-21.6 pg/mL) (P = 0.001). At first follow-up visit, sHLA-E levels were numerically higher in active disease than stable disease (P = 0.06) but this trend was blunted at second follow-up. sHLA-E levels increased in 54% versus 25% of patients with persistently active/relapsing and persistent stable course, respectively. rs1264457 polymorphism was not associated with susceptibility to TA and did not affect sHLA-E levels. CONCLUSION sHLA-E level is useful as a biomarker of disease activity and course in TA patients. rs1264457 polymorphism is neither associated with susceptibility nor did it influence sHLA-E levels in TA.
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Affiliation(s)
- Ruchika Goel
- Department of Clinical Immunology and Rheumatology, Christian Medical College, Vellore, India
| | - Jayakanthan Kabeerdoss
- Department of Clinical Immunology and Rheumatology, Christian Medical College, Vellore, India
| | - Hindhumathi Mohan
- Department of Clinical Immunology and Rheumatology, Christian Medical College, Vellore, India
| | - Sumita Danda
- Department of Medical Genetics, Christian Medical College, Vellore, India
| | - Visali Jayaseelan
- Department of Biostatistics, Christian Medical College, Vellore, India
| | - T Sathish Kumar
- Department of Child Health, Christian Medical College, Vellore, India
| | - John Jude
- Department of Microbiology, Christian Medical College, Vellore, India
| | - Paul Bacon
- School of Immunity and Infection, College of Medicine and Dentistry, University of Birmingham, Birmingham, UK
| | - George Joseph
- Department of Cardiology, Christian Medical College, Vellore, India
| | - Debashish Danda
- Department of Clinical Immunology and Rheumatology, Christian Medical College, Vellore, India
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Olieslagers TI, Voorter CEM, Groeneweg M, Xu Y, Wieten L, Tilanus MGJ. New insights in HLA-E polymorphism by refined analysis of the full-length gene. HLA 2017; 89:143-149. [PMID: 28127896 DOI: 10.1111/tan.12965] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 12/02/2016] [Accepted: 01/05/2017] [Indexed: 01/25/2023]
Abstract
BACKGROUND Human leukocyte antigen (HLA)-E is a non-classical HLA class I molecule that plays a role in both the innate and the adaptive immune response through interaction with receptors on natural killer- and T-cells. The HLA-E gene is characterized by limited polymorphism compared with the classical HLA loci on chromosome 6. At the start of this study, only 13 variable sites had been identified (IPD-IMGT/HLA Database v3.18.0). While most previous studies focused on polymorphism in exons 2 and 3 or specific gene regions, polymorphism in the other exons and introns could influence protein expression and function as well. Studies that investigate extended HLA-E polymorphism are therefore needed to better understand the functional relevance of HLA-E in health and disease. AIMS The aim of this study was to examine the variability of the full-length HLA-E gene region in individuals originating from different populations. MATERIALS AND METHODS/RESULTS A total of 7 new HLA-E alleles were identified using full-length HLA-E sequencing of 123 individuals from Asian, Dutch or Hunan Han origin. Furthermore, genome variation analysis of the third phase of the 1000 genomes database showed 107 new variable sites in 2504 individuals originating from 26 different populations. DISCUSSION AND CONCLUSION Our study demonstrates that the nucleotide variability of the HLA-E gene is much higher than previously known, albeit in only a limited number of individuals. Overall only 2 variants, HLA-E*01:01 and *01:03, are frequently present worldwide, suggesting that balancing selection is acting on HLA-E.
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Affiliation(s)
- T I Olieslagers
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, the Netherlands
| | - C E M Voorter
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, the Netherlands
| | - M Groeneweg
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Y Xu
- Immunogenetics Laboratory, Shenzhen Blood Center, Shenzhen, China
| | - L Wieten
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, the Netherlands
| | - M G J Tilanus
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, the Netherlands
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HLA-F coding and regulatory segments variability determined by massively parallel sequencing procedures in a Brazilian population sample. Hum Immunol 2016; 77:841-853. [PMID: 27448841 DOI: 10.1016/j.humimm.2016.07.231] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 07/18/2016] [Accepted: 07/19/2016] [Indexed: 12/30/2022]
Abstract
Human Leucocyte Antigen F (HLA-F) is a non-classical HLA class I gene distinguished from its classical counterparts by low allelic polymorphism and distinctive expression patterns. Its exact function remains unknown. It is believed that HLA-F has tolerogenic and immune modulatory properties. Currently, there is little information regarding the HLA-F allelic variation among human populations and the available studies have evaluated only a fraction of the HLA-F gene segment and/or have searched for known alleles only. Here we present a strategy to evaluate the complete HLA-F variability including its 5' upstream, coding and 3' downstream segments by using massively parallel sequencing procedures. HLA-F variability was surveyed on 196 individuals from the Brazilian Southeast. The results indicate that the HLA-F gene is indeed conserved at the protein level, where thirty coding haplotypes or coding alleles were detected, encoding only four different HLA-F full-length protein molecules. Moreover, a same protein molecule is encoded by 82.45% of all coding alleles detected in this Brazilian population sample. However, the HLA-F nucleotide and haplotype variability is much higher than our current knowledge both in Brazilians and considering the 1000 Genomes Project data. This protein conservation is probably a consequence of the key role of HLA-F in the immune system physiology.
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Di Cristofaro J, Pelardy M, Loundou A, Basire A, Gomez C, Chiaroni J, Thomas P, Reynaud-Gaubert M, Picard C. HLA-E(⁎)01:03 Allele in Lung Transplant Recipients Correlates with Higher Chronic Lung Allograft Dysfunction Occurrence. J Immunol Res 2016; 2016:1910852. [PMID: 27493971 PMCID: PMC4967441 DOI: 10.1155/2016/1910852] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/08/2016] [Accepted: 05/19/2016] [Indexed: 11/24/2022] Open
Abstract
Lung transplantation (LTx) is a valid therapeutic option for selected patients with end-stage lung disease. HLA-E seems to play a major role in the immune response to different viral infections and to affect transplantation outcome, in Hematopoietic Stem Cell Transplantation, for example. Two nonsynonymous alleles, HLA-E(⁎)01:01 and HLA-E(⁎)01:03, have functional differences, involving relative peptide affinity, cell surface expression, and potential lytic activity of NK cells. The aim of this retrospective study was to determine the impact of these two alleles for LTx recipients on anti-HLA alloimmunization risk, overall survival, and chronic rejection (CLAD). HLA-E was genotyped in 119 recipients who underwent LTx from 1998 to 2010 in a single transplantation center. In univariate analysis, both HLA-E homozygous states were associated with impaired overall survival compared to heterozygous HLA-E alleles (p = 0.01). In multivariate analysis, HLA-E(⁎)01:03 allele showed increased CLAD occurrence when compared to homozygous HLA-E(⁎)01:01 status (HR: 3.563 (CI 95%, 1.016-12), p = 0.047). HLA-E allele did not affect pathogen infection or the production of de novo DSA. This retrospective study shows an uninvestigated, deleterious association of HLA-E alleles with LTx and requires verification using a larger cohort.
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Affiliation(s)
| | - Mathieu Pelardy
- Immunogenetics Laboratory, EFS-Alpes Méditerranée, 13005 Marseille, France
| | - Anderson Loundou
- Department of Public Health, EA 3279 Research Unit, Marseille University Hospital, Aix-Marseille University, Marseille, France
| | - Agnès Basire
- Immunogenetics Laboratory, EFS-Alpes Méditerranée, 13005 Marseille, France
| | - Carine Gomez
- Service de Pneumologie, Hôpital Nord, 13015 Marseille, France
| | - Jacques Chiaroni
- CNRS, EFS, ADES UMR 7268, Aix-Marseille Université, 13916 Marseille, France
| | - Pascal Thomas
- Service de Chirurgie Thoracique, Hôpital Nord, 13015 Marseille, France
| | | | - Christophe Picard
- CNRS, EFS, ADES UMR 7268, Aix-Marseille Université, 13916 Marseille, France
- Immunogenetics Laboratory, EFS-Alpes Méditerranée, 13005 Marseille, France
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7
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Fotoohi M, Ghasemi N, Mirghanizadeh SA, Vakili M, Samadi M. Association between HLA-E gene polymorphism and unexplained recurrent spontaneous abortion (RSA) in Iranian women. Int J Reprod Biomed 2016. [DOI: 10.29252/ijrm.14.7.7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Castelli EC, Mendes-Junior CT, Sabbagh A, Porto IOP, Garcia A, Ramalho J, Lima THA, Massaro JD, Dias FC, Collares CVA, Jamonneau V, Bucheton B, Camara M, Donadi EA. HLA-E coding and 3' untranslated region variability determined by next-generation sequencing in two West-African population samples. Hum Immunol 2015; 76:945-53. [PMID: 26187162 DOI: 10.1016/j.humimm.2015.06.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 05/26/2015] [Accepted: 06/20/2015] [Indexed: 12/30/2022]
Abstract
HLA-E is a non-classical Human Leucocyte Antigen class I gene with immunomodulatory properties. Whereas HLA-E expression usually occurs at low levels, it is widely distributed amongst human tissues, has the ability to bind self and non-self antigens and to interact with NK cells and T lymphocytes, being important for immunosurveillance and also for fighting against infections. HLA-E is usually the most conserved locus among all class I genes. However, most of the previous studies evaluating HLA-E variability sequenced only a few exons or genotyped known polymorphisms. Here we report a strategy to evaluate HLA-E variability by next-generation sequencing (NGS) that might be used to other HLA loci and present the HLA-E haplotype diversity considering the segment encoding the entire HLA-E mRNA (including 5'UTR, introns and the 3'UTR) in two African population samples, Susu from Guinea-Conakry and Lobi from Burkina Faso. Our results indicate that (a) the HLA-E gene is indeed conserved, encoding mainly two different protein molecules; (b) Africans do present several unknown HLA-E alleles presenting synonymous mutations; (c) the HLA-E 3'UTR is quite polymorphic and (d) haplotypes in the HLA-E 3'UTR are in close association with HLA-E coding alleles. NGS has proved to be an important tool on data generation for future studies evaluating variability in non-classical MHC genes.
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Affiliation(s)
- Erick C Castelli
- School of Medicine of Botucatu, UNESP - Univ Estadual Paulista, Department of Pathology, Botucatu, State of São Paulo, Brazil.
| | - Celso T Mendes-Junior
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, SP, Brazil
| | - Audrey Sabbagh
- Institute of Research for Development, Mixed Research Unit 216 MERIT, Paris, France; Faculté de Pharmacie, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Iane O P Porto
- School of Medicine of Botucatu, UNESP - Univ Estadual Paulista, Department of Pathology, Botucatu, State of São Paulo, Brazil
| | - André Garcia
- Institute of Research for Development, Mixed Research Unit 216 MERIT, Paris, France; Faculté de Pharmacie, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Jaqueline Ramalho
- School of Medicine of Botucatu, UNESP - Univ Estadual Paulista, Department of Pathology, Botucatu, State of São Paulo, Brazil
| | - Thálitta H A Lima
- School of Medicine of Botucatu, UNESP - Univ Estadual Paulista, Department of Pathology, Botucatu, State of São Paulo, Brazil
| | - Juliana D Massaro
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo - USP, Ribeirão Preto, SP, Brazil
| | - Fabrício C Dias
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo - USP, Ribeirão Preto, SP, Brazil
| | - Cristhianna V A Collares
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo - USP, Ribeirão Preto, SP, Brazil
| | - Vincent Jamonneau
- International Center for Development Research on Aging in Sub-Humid Areas (CIRDES), Bobo-Dioulasso, Burkina Faso; Institute of Research for Development, Mixed Research Unit IRD-CIRAD 177, Montpellier, France
| | - Bruno Bucheton
- Institute of Research for Development, Mixed Research Unit IRD-CIRAD 177, Montpellier, France; National Sleeping Sickness Control Program, Ministry of Health and Public Hygiene, Conakry, Guinea
| | - Mamadou Camara
- National Sleeping Sickness Control Program, Ministry of Health and Public Hygiene, Conakry, Guinea
| | - Eduardo A Donadi
- Division of Clinical Immunology, Department of Medicine, School of Medicine of Ribeirão Preto, University of São Paulo - USP, Ribeirão Preto, SP, Brazil
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Martín P, Krsnik I, Navarro B, Provencio M, García JF, Bellas C, Vilches C, Gomez-Lozano N. HLA Allele E*01:01 Is Associated with a Reduced Risk of EBV-Related Classical Hodgkin Lymphoma Independently of HLA-A*01/*02. PLoS One 2015; 10:e0135512. [PMID: 26261988 PMCID: PMC4532421 DOI: 10.1371/journal.pone.0135512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 07/22/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND An inefficient immune response against Epstein-Barr virus (EBV) infection is related to the pathogenesis of a subgroup of classical Hodgkin lymphomas (cHL). Some EBV immune-evasion mechanisms target HLA presentation, including the non-classical HLA-E molecule. HLA-E can be recognized by T cells via the TCR, and it also regulates natural killer (NK) cell signaling through the inhibitory CD94/NKG2A receptor. Some evidences indicate that EBV-infected B-cells promote the proliferation of NK subsets bearing CD94/NKG2A, suggesting a relevant function of these cells in EBV control. Variations in CD94/NKG2A-HLA-E interactions could affect NK cell-mediated immunity and, consequently, play a role in EBV-driven transformation and lymphomagenesis. The two most common HLA-E alleles, E*01:01 and E*01:03, differ by a single amino acid change that modifies the molecule function. We hypothesized that the functional differences in these variants might participate in the pathogenicity of EBV. AIM We studied two series of cHL patients, both with EBV-positive and-negative cases, and a cohort of unrelated controls, to assess the impact of HLA-E variants on EBV-related cHL susceptibility. RESULTS We found that the genotypes with at least one copy of E*01:01 (i.e., E*01:01 homozygous and heterozygous) were underrepresented among cHL patients from both series compared to controls (72.6% and 71.6% vs 83%, p = 0.001). After stratification by EBV status, we found low rates of E*01:01-carriers mainly among EBV-positive cases (67.6%). These reduced frequencies are seen independently of other factors such as age, gender, HLA-A*01 and HLA-A*02, HLA alleles positively and negatively associated with the disease (adjusted OR = 0.4, p = 0.001). Furthermore, alleles from both HLA loci exert a cumulative effect on EBV-associated cHL susceptibility. CONCLUSIONS These results indicate that E*01:01 is a novel protective genetic factor in EBV-associated cHL and support a role for HLA-E recognition on the control of EBV infection and lymphomagenesis.
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Affiliation(s)
- Paloma Martín
- Group of Molecular Pathology, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Isabel Krsnik
- Department of Hematology, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Belen Navarro
- Department of Hematology, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Mariano Provencio
- Department of Oncology, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Juan F. García
- Department of Pathology, MD Anderson Cancer Center, Madrid, Spain
| | - Carmen Bellas
- Group of Molecular Pathology, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Carlos Vilches
- Group of Immunogenetics and Histocompatibility, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
| | - Natalia Gomez-Lozano
- Group of Immunity and lymphoproliferative diseases, Instituto de Investigación Sanitaria Puerta de Hierro (IDIPHIM), Majadahonda, Spain
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Abstract
Hematopoietic stem cell transplantation (HSCT) is a procedure in which infusion of hematopoietic stem cells is used to reestablish hematopoietic function in patients with damaged or defective bone marrow or immune systems. Early and late complications following allogeneic HSCT include acute and chronic graft-versus-host disease (GVHD), donor rejection, graft failure, relapse of primary malignancy, conditioning-related toxicity, immunodeficiency and infections. Immunology has a central role in allogeneic hematopoietic cell transplantation. Any appreciation of the immunological mechanism involved in engraftment, GVHD, the development of tolerance, immune reconstitution, and the control of malignancy requires some understanding of the immunologic basis for immune reactions provoked by grafting tissue from one individual to another. In the future it should be possible to learn what gene(s) must be activated and which must be repressed to force stem cells into division without maturation; to engineer a mechanism into the cells that stops proliferation and sets the stage for amplification; to search if there could be a universal donor cell line, neatly packaged and stabilized in sealed vials and distributed by the pharmaceutical industry; to modify the transplanted cells in such a way that they have a proliferative advantage over those of the host and to deliver the lethal blow against the neoplasm, perhaps the cells that are infused will be engineered in such a way as to be able to distinguish between normal host cells and tumor.
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Affiliation(s)
- Youssef Mohamed Mosaad
- Clinical Immunology Unit, Clinical Pathology Department & Mansoura Research Center for Cord Stem Cell (MARC-CSC), Mansoura Faculty of Medicine, Mansoura University , Mansoura , Egypt
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Ravindranath MH, Terasaki PI, Pham T, Jucaud V. The Monospecificity of Novel Anti-HLA-E Monoclonal Antibodies Enables Reliable Immunodiagnosis, Immunomodulation of HLA-E, and Upregulation of CD8+ T Lymphocytes. Monoclon Antib Immunodiagn Immunother 2015; 34:135-53. [PMID: 26090591 DOI: 10.1089/mab.2014.0096] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In human cancers, over-expression of HLA-E is marked by gene expression. However, immunolocalization of HLA-E on tumor cells is impeded by the HLA-Ia reactivity of commercial anti-HLA-E monoclonal antibodies (MAbs). So there was a clear need to develop monospecific anti-HLA-E MAbs for reliable immunodiagnosis of HLA-E, particularly considering the prognostic relevance of HLA-E in human cancer. HLA-E overexpression is correlated with disease progression and poor survival of patients, both of which are attributed to the suppression of anti-tumor activity of cytotoxic T cells mediated by HLA-E. The suppression mechanism involves the binding of HLA-E-specific amino acids located on the α1 and α2 helices of HLA-E to the inhibitory receptors (CD94/NKG2a) on CD8+ T lymphocytes. An anti-HLA-E MAb that recognizes these HLA-E-specific sequences can not only be a monospecific MAb with potential for specific immunolocalization of HLA-E but can also block the sequences from interacting with the CD94/NKG2a receptors. We therefore developed several clones that secrete such HLA-E-specific MAbs; then we assessed the ability of the MAbs to bind to the amino acid sequences interacting with the CD94/NKG2a receptors by inhibiting them from binding to HLA-E with peptides that inhibit receptor binding. Elucidation of the immunomodulatory capabilities of these monospecific MAbs showed that they can induce proliferation of CD8+ T cells with or without co-stimulation. These novel MAbs can serve a dual role in combating cancer by blocking interaction of HLA-E with CD94/NKG2a and by promoting proliferation of both non-activated and activated CD8+ cytotoxic αβ T cells.
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Affiliation(s)
| | | | - Tho Pham
- Terasaki Foundation Laboratory , Los Angeles, California
| | - Vadim Jucaud
- Terasaki Foundation Laboratory , Los Angeles, California
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Mossallam GI, Fattah RA, El-Haddad A, Mahmoud HK. HLA-E polymorphism and clinical outcome after allogeneic hematopoietic stem cell transplantation in Egyptian patients. Hum Immunol 2015; 76:161-5. [PMID: 25543014 DOI: 10.1016/j.humimm.2014.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 10/20/2014] [Accepted: 12/15/2014] [Indexed: 02/06/2023]
Abstract
UNLABELLED Human leukocyte antigen-E (HLA)-E in a non-classical major histocompatibility complex (MHC) class I (Ib) molecule. HLA-E-peptide complex acts as a ligand for natural killer (NK) cells and CD8+ T lymphocytes playing a dual role in natural and acquired immune responses. The difference in expression levels between HLA-E alleles was suggested to have impact on transplantation outcome. The aim of the study is to evaluate the clinical effect of HLA-E alleles on transplantation in a group of Egyptian patients. HLA-E genotyping was analyzed in eighty-eight recipients of stem cell transplantation using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). HLA-E*01:03 allele showed a trend towards lower cumulative incidence of relapse at 2 years compared to homozygous HLA-E*01:01 genotype (8% versus 21.5%, p=0.09, HR: 0.30, 95% CI: 0.91-1.69). HLA-E was the only factor showing near significant association with relapse incidence. HLA-E polymorphism did not affect the cumulative incidence of acute GVHD grades II-IV at 100 days, the 2-year cumulative incidence of extensive chronic GVHD, transplant related mortality (TRM) or overall survival (OS). CONCLUSION the suggested association of HLA-E polymorphism with reduced risk of relapse needs verification in a larger cohort. However, its proposed role in GVL helps better understanding of alloreactivity of T cells and NK cells and their implication in immunotherapy post allogeneic hematopoietic stem cell transplantation.
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Affiliation(s)
- Ghada I Mossallam
- Bone Marrow Transplantation Laboratory Unit, National Cancer Institute, Cairo University, Cairo, Egypt.
| | - Raafat Abdel Fattah
- Department of Medical Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Alaa El-Haddad
- Department of Pediatric Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Hossam K Mahmoud
- Department of Medical Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
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Li L, Tian W, Wang W, Liu K, Wang J, Jin H, Cai J, Wang J. NKG2C copy number variations in five distinct populations in mainland China and susceptibility to nasopharyngeal carcinoma (NPC). Hum Immunol 2015; 76:90-4. [PMID: 25636564 DOI: 10.1016/j.humimm.2015.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 10/02/2014] [Accepted: 01/15/2015] [Indexed: 01/10/2023]
Abstract
In this study, copy number variation (CNV) of NKG2C gene was investigated in 1129 normal, unrelated individuals representing two southern Chinese Han populations (Hunan Han and Guangdong Han), two northern Chinese populations (Inner Mongolia Han and Inner Mongolia Mongol) and one southeastern Chinese Han population (Fujian Han) using polymerase chain reaction-sequence-specific priming (PCR-SSP) method. CNV of NKG2C gene did not vary significantly among the five Chinese populations, with NKG2C gene deletion showing a frequency ranging from 0.2031 to 0.2688. Compared with worldwide ethnic groups, very significant difference was observed between the five Chinese populations and the Mexican mestizos (all Pcorrected=0.0025), and between the Fujian Han population and the German population (Pcorrected=0.005). We further examined CNV of NKG2C and HLA-E allelic distribution in 653 patients afflicted with nasopharyngeal carcinoma (NPC) in Hunan province. Neither CNV of NKG2C nor HLA-E was associated with NPC. There was a trend of reduced NPC risk in individuals who were homozygous for both HLA-E(∗)01:03 and NKG2C deletion (0.46% vs. 2.51%, P=0.0076, Pcorrected=0.0684, OR (95% CI)=0.1794 (0.0473-0.6809)). Taken together, our results suggest that NKG2C deletion and HLA-E signalling pathway does not play a major role in determining genetic susceptibility to NPC.
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Affiliation(s)
- LiXin Li
- Immunogenetics Research Group, Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China
| | - Wei Tian
- Immunogenetics Research Group, Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China.
| | - WenYi Wang
- Immunogenetics Research Group, Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China
| | - KangLong Liu
- Department of Nuclear Medicine, Hunan Cancer Hospital, The Affiliated Cancer Hospital of XiangYa Medical School of Central South University, Changsha, Hunan 410006, People's Republic of China
| | - JunLong Wang
- Department of Laboratory Medicine, The 5th Hospital of Zhangzhou City, Zhangzhou, Fujian, People's Republic of China
| | - HeKun Jin
- Department of Radiotherapy, Hunan Cancer Hospital, The Affiliated Cancer Hospital of XiangYa Medical School of Central South University, Changsha, Hunan 410006, People's Republic of China
| | - JinHong Cai
- Immunogenetics Research Group, Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China
| | - JunJie Wang
- Immunogenetics Research Group, Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China; Eight-Year Medical Educational Program, Central South University, School of Medicine, Changsha, Hunan, People's Republic of China
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Harmon QE, Engel SM, Wu MC, Moran TM, Luo J, Stuebe AM, Avery CL, Olshan AF. Polymorphisms in inflammatory genes are associated with term small for gestational age and preeclampsia. Am J Reprod Immunol 2014; 71:472-84. [PMID: 24702779 PMCID: PMC4040534 DOI: 10.1111/aji.12241] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 02/26/2014] [Indexed: 02/01/2023] Open
Abstract
PROBLEM Inflammatory biomarkers are associated with preeclampsia (PE) and poor fetal growth; however, genetic epidemiologic studies have been limited by reduced gene coverage and the exclusion of African American mothers. METHOD OF STUDY Cases and controls (N = 1646) from a pregnancy cohort were genotyped for 503 tagSNPs in 40 genes related to inflammation. Gene-set analyses were stratified by race and were followed by a single SNP analysis within significant gene sets. RESULTS Gene-level associations were found for IL6 and KLRD1 for term small for gestational age (SGA) among African Americans. LTA/TNF and TBX21 were associated with PE among European Americans. The strongest association was for PE among European Americans for an upstream regulator of TNF with RR = 1.8 (95% CI 1.1-2.7). CONCLUSION Although previous studies have suggested null associations, increased tagging and stratification by genetic ancestry suggests important associations between IL6 and term SGA for African Americans, and a TNF regulator and PE among European Americans (N = 149).
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Affiliation(s)
- Quaker E. Harmon
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Stephanie M. Engel
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Michael C. Wu
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Thomas M. Moran
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jingchun Luo
- Mammalian Genotyping Core, Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Alison M. Stuebe
- Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Christy L. Avery
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Andrew F. Olshan
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
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15
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Carvalho dos Santos L, Tureck LV, Wowk PF, Mattar SB, Gelmini GF, Magalhães JCM, Bicalho MDG, Roxo VMMS. HLA-E polymorphisms in an Afro-descendant Southern Brazilian population. Hum Immunol 2013; 74:199-202. [PMID: 23137877 DOI: 10.1016/j.humimm.2012.10.020] [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: 04/25/2012] [Revised: 10/18/2012] [Accepted: 10/26/2012] [Indexed: 11/30/2022]
Abstract
HLA-E is a non-classical I (Ib) gene which has limited polymorphism and low levels of tissue expression. Currently, 11 alleles are described in the literature with only three protein products. In the present study we investigated HLA-E gene variations at exons 2 and 3 and calculated allele, genotype and haplotype frequencies in a sample of 152 individuals who reported themselves as being Afro-descendants and who are voluntary bone marrow donors living in the state of Paraná, Brazil. The most frequent allele in the sample analyzed was the E(∗)01:01 (59.21%). The presence of the E(∗)01:04 allele was not detected suggesting that it has a very low worldwide frequency or that this allele may be an artifact of sequencing. We reported the most frequent alleles found as well as genotypes and haplotypes and compared our results with the few other studies found in the literature. This study is the first to investigate Afro-descendants from the South of Brazil.
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Affiliation(s)
- Luana Carvalho dos Santos
- Laboratory of Immunogenetics and Histocompatibility, Genetics Department, Universidade Federal do Paraná, Curitiba, Brazil
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16
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Antoun A, Vekaria D, Salama RA, Pratt G, Jobson S, Cook M, Briggs D, Moss P. The genotype of RAET1L (ULBP6), a ligand for human NKG2D (KLRK1), markedly influences the clinical outcome of allogeneic stem cell transplantation. Br J Haematol 2012; 159:589-98. [PMID: 23025544 DOI: 10.1111/bjh.12072] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 08/27/2012] [Indexed: 12/01/2022]
Abstract
NKG2D (KLRK1) is an activating receptor on natural killer (NK) and T-cells and binds a diverse panel of polymorphic ligands encoded by the MIC and RAET1 gene families. We studied the clinical importance of retinoic acid early transcript-1 (RAET1) polymorphism in allogeneic stem cell transplantation (SCT) by determining the frequency of 18 single nucleotide polymorphisms (SNPs) and individual RAET1 alleles in 371 patient-donor pairs and relating this to clinical outcome. A strong association was observed between the presence of five SNPs within the patient RAET1L (ULBP6) gene and relapse-free survival and overall survival. Two common alleles of RAET1L were determined and the presence of the protective RAET1L*02 allele in the patient was associated with a relapse-free survival of 44% at 8 years compared with just 25% in patients who lacked a RAET1L*02 allele (P < 0·001). Overall survival at this time was 55% in those with RAET1L*02 allele compared to 39% in patients who lacked a RAET1L*02 allele (P = 0·003). These novel findings indicate a critical role for NKG2D-RAET1L interactions in determining SCT clinical outcome and show RAET1L may have an important influence on regulating the strength of the alloreactive immune response. The data will be of value in guiding the development of future transplant therapy protocols.
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Affiliation(s)
- Ayman Antoun
- School of Cancer Sciences, University of Birmingham, Birmingham, UK.
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17
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Liu XX, Pan FH, Tian W. Characterization of HLA-E polymorphism in four distinct populations in Mainland China. TISSUE ANTIGENS 2012; 80:26-35. [PMID: 22486789 DOI: 10.1111/j.1399-0039.2012.01873.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, human leukocyte antigen (HLA)-E allelic typing was performed for 690 individuals from two southern Chinese Han populations (Hunan Han and Guangdong Han) and two northern Chinese populations (Inner Mongolia Han and Inner Mongolia Mongol) using polymerase chain reaction-sequence-specific priming (PCR-SSP) method. Our data showed that (1) HLA-E*01:01 and HLA-E*01:03, but not E*01:04 allele, were detected in the four populations, HLA-E distribution differed significantly between each of the two southern Chinese Han populations and the Inner Mongolia Mongol population, and between Hunan Han population and Inner Mongolia Han population; (2) HLA-G*01:05N-A*30-E*01:01-C*06-B*13:02-DRB1*07 was a conserved extended haplotype in the Chinese Han populations; (3) five HLA-A-E haplotypes showed significant linkage disequilibrium (LD) in at least one population, including HLA-A*02-E*01:03 in populations except for the Inner Mongolia Mongol group, HLA-A*01-E*01:01 and HLA-A*30-E*01:01 in the Hunan Han and the Inner Mongolia Han populations, HLA-A*33-E*01:01 in the two southern Chinese Han populations and HLA-A*03-E*01:03 in the Inner Mongolia Mongol group; and (4) Ewens-Watterson homozygosity test showed a trend for balancing selection at the HLA-E locus in each of the four populations. Our data unraveled the peculiarity in terms of HLA-E allelic and haplotypic repertoire in four main ethnic groups in Mainland China, findings shown here are valuable for future studies of the potential role of HLA-E in allogeneic organ transplantation and HLA-linked disease association in related ethnic groups.
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Affiliation(s)
- X X Liu
- Department of Immunology, College of Basic Medical Sciences, Central South University, Changsha, Hunan, People's Republic of China
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18
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Abstract
Human leukocyte antigen-E (HLA-E) is a non-classical HLA class I gene that shows a limited degree of polymorphism compared to the classical HLA genes. The HLA-E molecule can bind peptides derived from the leader sequence of various HLA class I alleles and some viral homologues, including CMV. The HLA-E peptide complex can act as a ligand for the CD94/NKG2 receptors expressed on the surface of natural killer cells and T cell subsets. Differences in expression levels between the different HLA-E alleles have been reported and a role for HLA-E polymorphism in stem cell transplantation has been postulated. This chapter focuses on routine technologies for HLA-E typing: the sequence-specific primer-PCR method that uses sequence-specific primers, the PCR sequence-specific oligonucleotides Luminex method, using sequence-specific probes attached to beads and the sequencing-based typing method, where sequencing of the alleles is performed.
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Affiliation(s)
- Nina Lauterbach
- Transplantation Immunology, Tissue Typing Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
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19
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Hassen E, Ghedira R, Ghandri N, Farhat K, Gabbouj S, Bouaouina N, Abdelaziz H, Nouri A, Chouchane L. Lack of association between human leukocyte antigen-E alleles and nasopharyngeal carcinoma in Tunisians. DNA Cell Biol 2011; 30:603-9. [PMID: 21332388 DOI: 10.1089/dna.2010.1140] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC), a cancer with a remarkable geographical and worldwide ethnic distribution, has been strongly associated with human leukocyte antigen (HLA) class I genes. The presence of additional HLA risk factors has been suggested by several reports. In the present study, we analyzed the implication of HLA-E gene polymorphisms in NPC susceptibility in Tunisians, a population characterized by an intermediate incidence of NPC with specific clinical features. Peripheral blood DNA was obtained from 185 patients with NPC and 177 matched controls. Genotyping for three single-nucleotide polymorphisms, codon 83Gly/Arg, codon 157Arg/Gly, and codon 107Arg/Gly, was performed using the polymerase chain reaction method. The HLA-E*01:01 and HLA-E*01:03 were the only alleles found among Tunisians. The HLA-E*01:03 allele had a slight increase in patients with NPC (43%) compared with controls (37%), but the difference did not reach a statistical significance. Our results show the lack of association between HLA-E alleles and NPC in the Tunisian population. This is not in agreement with the previous studies, suggesting a potential implication of HLA-E gene polymorphisms in the susceptibility to NPC among populations with high-risk incidence. Our study further supports the dissimilarity of NPC between populations with different NPC incidence.
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Affiliation(s)
- Elham Hassen
- Molecular Immuno-Oncology Laboratory, Faculty of Medicine, Monastir University, Monastir, Tunisia.
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Mosaad YM, Abdel-Dayem Y, El-Deek BS, El-Sherbini SM. Association between HLA-E *0101 homozygosity and recurrent miscarriage in Egyptian women. Scand J Immunol 2011; 74:205-9. [PMID: 21410502 DOI: 10.1111/j.1365-3083.2011.02559.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The objective was to investigate the frequency of human leucocyte antigen (HLA)-E alleles in Egyptian women with and without recurrent miscarriage (RM) to evaluate their role on the maintenance of pregnancy. A case-control study was adopted. HLA-E gene polymorphism typing was carried out by restriction fragment length polymorphism for 108 women with RM and 120 fertile female controls. The frequency of HLA-E *0101 allele was higher in patients with RM and HLA-E*0103 allele was higher in fertile controls, and the difference was statistically significant (P=0.003, P(c)=0.006). HLA-E*0101/0101 genotype was the most frequent genotype in patients (45.4%), followed by HLA-E*0101/0103 (44.4%) and finally HLA-E*0103/0103 genotype (10.2%). The difference in the frequency of HLA-E*0101/0101 homozygous genotype in patients with RM compared with that in the fertile controls was statistically significant (OR=2.02, 95% CI=1.13-3.62, P=0.011, P(c)=0.033). We found an increased frequency of homozygosity for HLA-E*0101 in Egyptian women with RM. HLA-E*0101 homozygosity may thus be a risk factor for RM.
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Affiliation(s)
- Y M Mosaad
- Mansoura Faculty of Medicine, Clinical Pathology Department, Clinical Immunology Unit, Mansoura, Egypt.
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21
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Di Cristofaro J, Julie DC, Buhler S, Frassati C, Basire A, Galicher V, Baier C, Essautier A, Regnier A, Granier T, Lepfoundzou AD, Chiaroni J, Picard C. Linkage disequilibrium between HLA-G*0104 and HLA-E*0103 alleles in Tswa Pygmies. TISSUE ANTIGENS 2011; 77:193-200. [PMID: 21299523 DOI: 10.1111/j.1399-0039.2010.01599.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nonclassical human leukocyte antigen (HLA)-G and -E loci are separated by approximately 660 kb on the short arm of chromosome 6. Interestingly, some functional and expression characteristics are relatively identical or associated for both molecules. For example, expression of HLA-E on the cell surface has been linked to preferential binding of nonameric leader peptides derived from the signal sequence of HLA-G. It has been suggested that these two molecules act synergistically in modulating susceptibility to infectious or chronic inflammatory diseases. A possible explanation for these observations is that HLA-E and HLA-G are evolving under analogous selective pressures and have functions that place them under selective regimes differing from classical HLA genes. The purpose of this study was to investigate the consistency of this hypothesis based on the characterization of the molecular polymorphism of these two genes and their linkage disequilibrium (LD) in three populations, i.e. Southeastern French (n = 57), Teke Congolese (n = 84) and Tswa Pygmies (n = 74). Allelic frequencies observed for HLA-G and HLA-E and for 14-bp ins/del polymorphism in the three populations were similar to those observed in the literature for populations from corresponding geographic areas. Only one of the recently described HLA-G polymorphisms (HLA-G*01:07-01:16) was found, i.e. HLA-G*01:15 in one individual from Congo. We showed that two haplotypes in Tswa Pygmies, i.e. HLA-G*01:04-E*01:03:01 and G*01:04-E*01:01, exhibited highly significant positive and negative D' values respectively. Although these LD could have functional implications, it is more likely because of the genetic drift as the two other populations did not display any significant LD.
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Affiliation(s)
- J Di Cristofaro
- UMR 6578 (Anthropobiologie Bioculturelle), Université de la Méditerranée, CNRS, EFS, Marseille, France
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Single nucleotide polymorphism analysis of the NKG2D ligand cluster on the long arm of chromosome 6: Extensive polymorphisms and evidence of diversity between human populations. Hum Immunol 2010; 71:610-20. [DOI: 10.1016/j.humimm.2010.02.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 02/03/2010] [Accepted: 02/18/2010] [Indexed: 11/17/2022]
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Danzer M, Polin H, Pröll J, Haunschmid R, Hofer K, Stabentheiner S, Hackl C, Kasparu H, König J, Hauser H, Binder M, Weiss R, Gabriel C, Krieger O. Clinical significance of HLA-E*0103 homozygosity on survival after allogeneic hematopoietic stem-cell transplantation. Transplantation 2009; 88:528-32. [PMID: 19696636 DOI: 10.1097/tp.0b013e3181b0e79e] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Hematopoietic stem-cell transplantation is a well-established treatment in various hematologic malignancies, but the outcome depends on disease relapse, infections, and the development and severity of acute and chronic graft-versus-host disease. Some evidence has revealed an important role for the nonclassical major histocompatibility complex class I molecules in transplantation, most notably human leukocyte antigen (HLA)-E. This study evaluates the impact of HLA-E alleles on transplantation outcome after HLA-matched allogeneic HSCT. METHODS We genotyped DNA for HLA-E polymorphism from 83 recipients and their respective donors by real-time polymerase chain reaction after melting curve analysis and compared the results with clinical outcome. RESULTS HLA-E*0103 homozygous patients showed a higher probability of overall survival (P=0.003) and disease-free survival (P=0.001) in a univariate model. Cox regression analysis confirmed HLA-E*0103, 0103 (P=0.006; relative risk 1.12; 95% confidence interval 0.31-1.94) and early stage of disease (P=0.005; relative risk 1.16; 95% confidence interval 0.45-1.86) as independent factors improving overall survival. Moreover, homozygosity for HLA-E*0103 was associated with a significant decreased incidence of transplant-related mortality (P=0.01). CONCLUSIONS We found an association between HLA-E*0103 homozygosity and the significant reduction of transplant-related mortality in related and unrelated HSCT. The risk of posttransplant complications was significantly reduced when the donor possesses the HLA-E*0103, 0103 genotype, and this was translated in a better overall survival.
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Affiliation(s)
- Martin Danzer
- Red Cross Transfusion Service of Upper Austria, Linz, Austria.
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