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Gaig C, Sabater L. New knowledge on anti-IgLON5 disease. Curr Opin Neurol 2024; 37:316-321. [PMID: 38563128 PMCID: PMC11064895 DOI: 10.1097/wco.0000000000001271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
PURPOSE OF REVIEW Anti-IgLON5 disease is characterized by a distinctive sleep disorder, associated with a heterogeneous spectrum of neurological symptoms. Initial autopsies showed a novel neuronal tauopathy predominantly located in the tegmentum of the brainstem. Recently, new diagnostic red flags, biomarkers predictors of response to immunotherapy, and novel insights into the autoimmune pathogenesis of the disease have been reported. RECENT FINDINGS Patients with diagnosis of neurodegenerative dementia, progressive supranuclear palsy (PSP) or with motor-neuron disease (MND)-like syndrome have been reported to have IgLON5 antibodies, which are the hallmark of anti-IgLON5 disease. Second, low levels of neurofilament light chain in serum and cerebrospinal fluid of patients at disease onset could be a predictor of immunotherapy response. Recent neuropathological studies indicate that the neuronal tau deposits occur late in the course of the disease. Moreover, IgLON5 antibodies induce cytoskeletal changes in cultured hippocampal neurons suggesting that the tauopathy could be secondary of the IgLON5 antibody effects. SUMMARY Anti-IgLON5 disease can mimic and should be considered in atypical presentations of MND, neurodegenerative dementia and PSP. Neurofilament light chain levels seem promising biomarker for disease prognosis. Finally, the neuropathological and in vitro experimental studies strengthen the autoimmune hypothesis of the disease.
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Affiliation(s)
- Carles Gaig
- Service of Neurology, Hospital Clinic de Barcelona
| | - Lidia Sabater
- Neuroimmunology Program, Fundació de Recerca Clínic Barcelona-Institut d’Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
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2
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Marinović I, Čečuk-Jeličić E, Perković D, Marasović Krstulović D, Aljinović J, Šošo D, Škorić E, Martinović Kaliterna D. Association of HLA-DRB1 alleles with rheumatoid arthritis in Split-Dalmatia County in southern Croatia. Wien Klin Wochenschr 2022; 134:463-470. [PMID: 35238988 DOI: 10.1007/s00508-022-02010-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/26/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the distribution of HLA-DRB1 alleles in patients with rheumatoid arthritis (RA) in the Sinj Region (SR) and the rest of the Split-Dalmatia County (SDC) in Croatia and to determine their relationship with disease severity. METHODS A total of 74 RA patients and 80 healthy controls from the SR, and 74 RA patients and 80 healthy controls from the rest of the SDC were genotyped using sequence-specific oligonucleotide primed PCR. High-resolution typing of HLA-DRB1*04 alleles was performed using the single specific primed polymerase chain reaction (PCR-SSP) method. Serum anti-CCP, rheumatoid factor, C‑reactive protein, and erythrocyte sedimentation rate were measured in all RA patients, whereas disease activity was assessed by DAS-28 and functional status by the Health Assessment Questionnaire Disability Index. RESULTS The HLA-DRB1*04 allele was more frequent in patients with RA from the SR than that in patients from the rest of the SDC (18.2% vs. 9.5%; P = 0.014), whereas the HLA-DRB1*15 allele was more frequent in patients with RA from the rest of the SDC than in patients from the SR (16.2% vs. 7.4%; P = 0.010). Shared epitope (SE) positive patients from the SR had significantly higher serum anti-CCP and RF antibody levels (P = 0.014 and P = 0.004, respectively), higher disease activity (P = 0.043), and worse functional status (P < 0.001), than SE-positive patients from the rest of the SDC. CONCLUSION The observed higher incidence of more severe forms of RA in the SR in comparison to the rest of the SDC might be associated with the higher incidence of HLA-DRB1*04 allele in the SR.
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Affiliation(s)
- Ivanka Marinović
- Department of Physical Medicine and Rehabilitation with Rheumatology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia.
- Department of Health Studies, University of Split, Ruđera Boškovića 35, 21000, Split, Croatia.
| | - Esma Čečuk-Jeličić
- Department of Blood Transfusion Tissue Typing Laboratory, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
- Department of Health Studies, University of Split, Ruđera Boškovića 35, 21000, Split, Croatia
| | - Dijana Perković
- Department of Rheumatology and Clinical Immunology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
- University of Split School of Medicine, Šoltanska 2, 21000, Split, Croatia
| | - Daniela Marasović Krstulović
- Department of Rheumatology and Clinical Immunology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
- University of Split School of Medicine, Šoltanska 2, 21000, Split, Croatia
| | - Jure Aljinović
- Department of Physical Medicine and Rehabilitation with Rheumatology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
- Department of Health Studies, University of Split, Ruđera Boškovića 35, 21000, Split, Croatia
| | - Daniela Šošo
- Department of Physical Medicine and Rehabilitation with Rheumatology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
| | - Ela Škorić
- Department of Physical Medicine and Rehabilitation with Rheumatology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
| | - Dušanka Martinović Kaliterna
- Department of Rheumatology and Clinical Immunology, University Hospital of Split, Spinčićeva 1, 21000, Split, Croatia
- University of Split School of Medicine, Šoltanska 2, 21000, Split, Croatia
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3
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Aran A, Peg V, Rabanal RM, Bernadó C, Zamora E, Molina E, Arribas YA, Arribas J, Pérez J, Roura-Mir C, Carrascal M, Cortés J, Martí M. Epstein-Barr Virus+ B Cells in Breast Cancer Immune Response: A Case Report. Front Immunol 2021; 12:761798. [PMID: 34868006 PMCID: PMC8637110 DOI: 10.3389/fimmu.2021.761798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/21/2021] [Indexed: 11/13/2022] Open
Abstract
EBV-specific T cells have been recently described to be involved in fatal encephalitis and myocarditis in cancer patients after immune checkpoint therapies. Here, we report the study of a human triple-negative breast cancer tumor (TNBC) and EBV-transformed B cells obtained from a patient-derived xenograft (PDX) that progressed into a lymphocytic neoplasm named xenograft-associated B-cell lymphoma (XABCL). T-cell receptor (TCR) high-throughput sequencing was performed to monitor the T-cell clonotypes present in the different samples. Forty-three T-cell clonotypes were found infiltrating the XABCL tissue after three passes in mice along 6 months. Eighteen of these (42%) were also found in the TNBC biopsy. TCR infiltrating the XABCL tissue showed a very restricted T-cell repertoire as compared with the biopsy-infiltrating T cells. Consequently, T cells derived from the TNBC biopsy were expanded in the presence of the B-cell line obtained from the XABCL (XABCL-LCL), after which the TCR repertoire obtained was again very restricted, i.e., only certain clonotypes were selected by the B cells. A number of these TCRs had previously been reported as sequences involved in infection, cancer, and/or autoimmunity. We then analyzed the immunopeptidome from the XABCL-LCL, to identify putative B-cell-associated peptides that might have been expanding these T cells. The HLA class I and class II-associated peptides from XABCL-LCL were then compared with published repertoires from LCL of different HLA typing. Proteins from the antigen processing and presentation pathway remained significantly enriched in the XABCL-LCL repertoire. Interestingly, some class II-presented peptides were derived from cancer-related proteins. These results suggest that bystander tumor-infiltrating EBV+ B cells acting as APC may be able to interact with tumor-infiltrating T cells and influence the TCR repertoire in the tumor site.
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Affiliation(s)
- Andrea Aran
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Vicente Peg
- Translational Molecular Pathology, Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain
| | - Rosa Maria Rabanal
- Unitat de Patologia Murina i Comparada, Department of Animal Medicine and Surgery, Veterinary Faculty, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | - Cristina Bernadó
- Preclinical and Translational Research Program, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Esther Zamora
- Breast Cancer Unit, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Elisa Molina
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Yago A Arribas
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Joaquín Arribas
- Preclinical and Translational Research Program, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain.,Cancer Research Program, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer, Madrid, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - José Pérez
- International Breast Cancer Center (BCC), Quironsalud Group, Barcelona, Spain
| | - Carme Roura-Mir
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Montserrat Carrascal
- Biological and Environmental Proteomics, Institute of Biomedical Research of Barcelona, Spanish National Research Council, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IIBB-CSIC/IDIBAPS), Barcelona, Spain
| | - Javier Cortés
- Breast Cancer Unit, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Barcelona, Spain.,International Breast Cancer Center (BCC), Quironsalud Group, Barcelona, Spain
| | - Mercè Martí
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
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Abstract
Centromeric proteins are the foundation for assembling the kinetochore, a macromolecular complex that is essential for accurate chromosome segregation during mitosis. Anti-centromere antibodies (ACAs) are polyclonal autoantibodies targeting centromeric proteins (CENP-A, CENP-B, CENP-C), predominantly CENP-B, and are highly associated with rheumatologic disease (lcSSc/CREST syndrome). CENP-B autoantibodies have also been reported in cancer patients without symptoms of rheumatologic disease. The rise of oncoimmunotherapy stimulates inquiry into how and why anti-CENP-B autoantibodies are formed. In this review, we describe the clinical correlations between anti-CENP-B autoantibodies, rheumatologic disease, and cancer; the molecular features of CENP-B; possible explanations for autoantigenicity; and, finally, a possible mechanism for induction of autoantibody formation.
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Chen Q, Chen DY, Xu XZ, Liu YY, Yin TT, Li D. Platelet/Lymphocyte, Lymphocyte/Monocyte, and Neutrophil/Lymphocyte Ratios as Biomarkers in Patients with Rheumatoid Arthritis and Rheumatoid Arthritis-Associated Interstitial Lung Disease. Med Sci Monit 2019; 25:6474-6481. [PMID: 31462627 PMCID: PMC6733153 DOI: 10.12659/msm.916583] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The objective of this study was to assess the diagnostic value of platelet/lymphocyte ratio (PLR), lymphocyte/monocyte ratio (LMR), and neutrophil/lymphocyte ratio (NLR) as biomarkers in patients with rheumatoid arthritis (RA) and rheumatoid arthritis-associated interstitial lung disease (RA-ILD). MATERIAL AND METHODS Demographic and laboratory data were acquired for 198 RA and 103 RA-ILD patients and 290 healthy controls. The subjects were categorized into female and male groups and further subcategorized based on age into <60 years and ≥60 years subgroups. One-way analysis of variance (ANOVA), receiver operating characteristics (ROC), Pearson analysis, multiple linear regression analysis, and logistic regression analysis were performed to analyze the association of PLR, NLR, and LMR with RA and RA-ILD. RESULTS Mean PLR and NLR were lowest in the control group, followed by the RA and RA-ILD groups (p<0.05). Mean LMR was lowest in the RA-ILD group, followed by the RA and control groups (p<0.05). The area under the ROC (AUROC) values of the PLR to distinguish between RA and controls, RA-ILD and controls, and RA-ILD and RA were 0.676, 0.776, and 0.650, respectively (p<0.001). Multiple linear regression analysis suggested a significantly positive association between the level of PLR and the level of DAS28 (p<0.001). The odds ratio of PLR was 1.101 for RA (p=0.023) and 1.217 for RA-ILD (p<0.001) when compared to the controls. CONCLUSIONS PLR may be applied as a new biomarker for predicting and diagnosing RA and RA-ILD and for distinguishing RA-ILD patients from RA patients and healthy subjects.
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Affiliation(s)
- Qiang Chen
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong, China (mainland)
| | - Dong-Yu Chen
- Department of Rheumatology, Taian City Central Hospital, Taian, Shandong, China (mainland)
| | - Xi-Zhu Xu
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong, China (mainland)
| | - Ying-Ying Liu
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong, China (mainland)
| | - Ting-Ting Yin
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong, China (mainland)
| | - Dong Li
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong, China (mainland)
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6
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Mestre-Ferrer A, Scholz E, Humet-Alsius J, Alvarez I. PRBAM: a new tool to analyze the MHC class I and HLA-DR anchor motifs. Immunology 2018; 156:187-198. [PMID: 30408168 DOI: 10.1111/imm.13020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 11/30/2022] Open
Abstract
Major histocompatibility complex (MHC) genes are highly polymorphic, which makes each MHC molecule different regarding their peptide repertoire, so they can bind and present to T lymphocytes. The increasing importance of immunopeptidomics and its use in personalized medicine in different fields such as oncology or autoimmunity demand the correct analysis of the peptide repertoires bound to human leukocyte antigen type 1 (HLA-I) and HLA-II molecules. Purification of the peptide pool by affinity chromatography and individual peptide sequencing using mass spectrometry techniques is the standard protocol to define the binding motifs of the different MHC-I and MHC-II molecules. The identification of MHC-I binding motifs is relatively simple, but it is more complicated for MHC-II. There are some programs that identify the anchor motifs of MHC-II molecules. However, these programs do not identify the anchor motif correctly for some HLA-II molecules and some anchor motifs have been deduced using subjective interpretation of the data. Here, we present a new software, called PRBAM (Peptide Repertoire-Based Anchor Motif) that uses a new algorithm based on the peptide-MHC interactions and, using peptide lists obtained by mass spectrometry sequencing, identifies the binding motif of MHC-I and HLA-DR molecules. PRBAM has an easy-to-use interface, and the results are presented in graphics, tables and peptide lists. Finally, the fact that PRBAM uses a new algorithm makes it complementary to other existing programs.
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Affiliation(s)
- Anna Mestre-Ferrer
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Erika Scholz
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | | | - Iñaki Alvarez
- Immunology Unit, Department of Cell Biology, Physiology and Immunology, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
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7
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Jansen DTSL, Ramnoruth N, Loh KL, Rossjohn J, Reid HH, Nel HJ, Thomas R. Flow Cytometric Clinical Immunomonitoring Using Peptide-MHC Class II Tetramers: Optimization of Methods and Protocol Development. Front Immunol 2018; 9:8. [PMID: 29403492 PMCID: PMC5786526 DOI: 10.3389/fimmu.2018.00008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 01/03/2018] [Indexed: 12/20/2022] Open
Abstract
With the advent of novel strategies to induce tolerance in autoimmune and autoimmune-like conditions, clinical trials of antigen-specific tolerizing immunotherapy have become a reality. Besides safety, it will be essential to gather mechanistic data on responding CD4+ T cells to assess the effects of various immunomodulatory approaches in early-phase trials. Peptide–MHC class II (pMHCII) multimers are an ideal tool for monitoring antigen-specific CD4+ T cell responses in unmanipulated cells directly ex vivo. Various protocols have been published but there are reagent and assay limitations across laboratories that could hinder their global application to immune monitoring. In this methodological analysis, we compare protocols and test available reagents to identify sources of variability and to determine the limitations of the tetramer binding assay. We describe a robust pMHCII flow cytometry-based assay to quantify and phenotype antigen-specific CD4+ T cells directly ex vivo from frozen peripheral blood mononuclear cell samples, which we suggest should be tested across various laboratories to standardize immune-monitoring results.
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Affiliation(s)
- Diahann T S L Jansen
- University of Queensland Diamantina Institute, Translational Research Institute, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Nishta Ramnoruth
- University of Queensland Diamantina Institute, Translational Research Institute, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Khai L Loh
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC, Australia.,School of Medicine, Institute of Infection and Immunity, Cardiff University, Cardiff, United Kingdom
| | - Hugh H Reid
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC, Australia
| | - Hendrik J Nel
- University of Queensland Diamantina Institute, Translational Research Institute, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Ranjeny Thomas
- University of Queensland Diamantina Institute, Translational Research Institute, Princess Alexandra Hospital, Brisbane, QLD, Australia
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Scholz EM, Marcilla M, Daura X, Arribas-Layton D, James EA, Alvarez I. Human Leukocyte Antigen (HLA)-DRB1*15:01 and HLA-DRB5*01:01 Present Complementary Peptide Repertoires. Front Immunol 2017; 8:984. [PMID: 28871256 PMCID: PMC5566978 DOI: 10.3389/fimmu.2017.00984] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/02/2017] [Indexed: 11/21/2022] Open
Abstract
Human leukocyte antigen (HLA)-DR15 is a haplotype associated with multiple sclerosis. It contains the two DRB* genes DRB1*1501 (DR2b) and DRB5*0101 (DR2a). The reported anchor motif of the corresponding HLA-DR molecules was determined in 1994 based on a small number of peptide ligands and binding assays. DR2a could display a set of peptides complementary to that presented by DR2b or, alternatively, a similar peptide repertoire but recognized in a different manner by T cells. It is known that DR2a and DR2b share some peptide ligands, although the degree of similarity of their associated peptidomes remains unclear. In addition, the contribution of each molecule to the global peptide repertoire presented by the HLA-DR15 haplotype has not been evaluated. We used mass spectrometry to analyze the peptide pools bound to DR2a and DR2b, identifying 169 and 555 unique peptide ligands of DR2a and DR2b, respectively. The analysis of these sets of peptides allowed the refinement of the corresponding binding motifs revealing novel anchor residues that had been overlooked in previous analyses. Moreover, the number of shared ligands between both molecules was low, indicating that DR2a and DR2b present complementary peptide repertoires to T cells. Finally, our analysis suggests that, quantitatively, both molecules contribute to the peptide repertoire presented by cells expressing the HLA-DR15 haplotype.
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Affiliation(s)
- Erika Margaret Scholz
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Immunology Unit, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Miguel Marcilla
- Proteomics Unit, Centro Nacional de Biotecnología (CSIC), Madrid, Spain
| | - Xavier Daura
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | | | - Eddie A James
- Benaroya Research Institute at Virginia Mason, Seattle, WA, United States
| | - Iñaki Alvarez
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Immunology Unit, Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
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9
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Scholz E, Mestre-Ferrer A, Daura X, García-Medel N, Carrascal M, James EA, Kwok WW, Canals F, Álvarez I. A Comparative Analysis of the Peptide Repertoires of HLA-DR Molecules Differentially Associated With Rheumatoid Arthritis. Arthritis Rheumatol 2016; 68:2412-21. [PMID: 27158783 DOI: 10.1002/art.39736] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/26/2016] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To evaluate similarity of the peptide repertoires bound to HLA-DR molecules that are differentially associated with rheumatoid arthritis (RA), and to define structural features of the shared peptides. METHODS Peptide pools bound to HLA-DRB1*01:01, HLA-DRB1*04:01, and HLA-DRB1*10:01 (RA associated) and those bound to HLA-DRB1*15:01 (non-RA-associated) were purified and analyzed by liquid chromatography (LC) matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MS) and LC-ion-trap MS. Peptide pools from each allotype were compared in terms of size, protein origin, composition, and affinity (both theoretical and experimental with some peptides). Finally, 1 peptide sequenced from DR1, DR4, and DR10, but not from DR15, was modeled in complex with all 4 HLA-DRB1 molecules and HLA-DRB5*01:01. RESULTS A total of 6,309 masses and 962 unique peptide sequences were compared. DR10 shared 29 peptides with DR1, 9 with DR4, and 1 with DR15; DR1 shared 6 peptides with DR4 and 9 with DR15; and DR4 and DR15 shared 4 peptides. The direct identification of peptide ligands indicated that DR1 and DR10 were the most similar molecules regarding the peptides that they could share. The peptides common to these molecules contained a high proportion of Leu at P4 and basic residues at P8 binding core positions. CONCLUSION The degree of overlap between peptide repertoires associated with different HLA-DR molecules is low. The repertoires associated with DR1 and DR10 have the highest similarity among the molecules analyzed (∼10% overlap). Among the peptides shared between DR1 and DR10, a high proportion contained Leu(4) and basic residues at the P8 position of the binding core.
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Affiliation(s)
- Erika Scholz
- Institut de Biotecnologia i de Biomedicina and Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Anna Mestre-Ferrer
- Institut de Biotecnologia i de Biomedicina and Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Xavier Daura
- Institut de Biotecnologia i de Biomedicina and Universitat Autònoma de Barcelona, Bellaterra, Spain, and Catalan Institution for Research and Advanced Studies, Barcelona, Spain
| | | | - Montserrat Carrascal
- CSIC/UAB Proteomics Laboratory, IIBB-CSIC/Institut d'Investigacions Biomèdiques August Pi i Sunyer, Bellaterra, Spain
| | - Eddie A James
- Benaroya Research Institute at Virginia Mason, Seattle, Washington
| | - William W Kwok
- Benaroya Research Institute at Virginia Mason, Seattle, Washington
| | - Francesc Canals
- Vall d'Hebron University Hospital Research Institute Proteomics Laboratory, Barcelona, Spain
| | - Iñaki Álvarez
- Institut de Biotecnologia i de Biomedicina and Universitat Autònoma de Barcelona, Bellaterra, Spain.
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10
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Mommen GPM, Marino F, Meiring HD, Poelen MCM, van Gaans-van den Brink JAM, Mohammed S, Heck AJR, van Els CACM. Sampling From the Proteome to the Human Leukocyte Antigen-DR (HLA-DR) Ligandome Proceeds Via High Specificity. Mol Cell Proteomics 2016; 15:1412-23. [PMID: 26764012 PMCID: PMC4824864 DOI: 10.1074/mcp.m115.055780] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Indexed: 12/12/2022] Open
Abstract
Comprehensive analysis of the complex nature of the Human Leukocyte Antigen (HLA) class II ligandome is of utmost importance to understand the basis for CD4+ T cell mediated immunity and tolerance. Here, we implemented important improvements in the analysis of the repertoire of HLA-DR-presented peptides, using hybrid mass spectrometry-based peptide fragmentation techniques on a ligandome sample isolated from matured human monocyte-derived dendritic cells (DC). The reported data set constitutes nearly 14 thousand unique high-confident peptides, i.e. the largest single inventory of human DC derived HLA-DR ligands to date. From a technical viewpoint the most prominent finding is that no single peptide fragmentation technique could elucidate the majority of HLA-DR ligands, because of the wide range of physical chemical properties displayed by the HLA-DR ligandome. Our in-depth profiling allowed us to reveal a strikingly poor correlation between the source proteins identified in the HLA class II ligandome and the DC cellular proteome. Important selective sieving from the sampled proteome to the ligandome was evidenced by specificity in the sequences of the core regions both at their N- and C- termini, hence not only reflecting binding motifs but also dominant protease activity associated to the endolysosomal compartments. Moreover, we demonstrate that the HLA-DR ligandome reflects a surface representation of cell-compartments specific for biological events linked to the maturation of monocytes into antigen presenting cells. Our results present new perspectives into the complex nature of the HLA class II system and will aid future immunological studies in characterizing the full breadth of potential CD4+ T cell epitopes relevant in health and disease.
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Affiliation(s)
- Geert P M Mommen
- From the ‡Institute for Translational Vaccinology, P.O. Box 450, 3720 AL Bilthoven, the Netherlands; §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Fabio Marino
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Hugo D Meiring
- From the ‡Institute for Translational Vaccinology, P.O. Box 450, 3720 AL Bilthoven, the Netherlands
| | - Martien C M Poelen
- ‖Centre for Infectious Disease Control, National Institute for Public Health and the Environment, P.O. Box 1, 3720 AL Bilthoven, the Netherlands
| | | | - Shabaz Mohammed
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands; **Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, OX13TA, Oxford, United Kingdom; ‡‡Department of Biochemistry, University of Oxford, South Parks Road, OX1 3QU, Oxford, United Kingdom
| | - Albert J R Heck
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Cécile A C M van Els
- ‖Centre for Infectious Disease Control, National Institute for Public Health and the Environment, P.O. Box 1, 3720 AL Bilthoven, the Netherlands;
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11
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de Jong H, Koffeman EC, Meerding JM, Scholman RC, Wieten L, de Jager W, Klein M, Otten H, van Wijk F, van der Zee R, Bijlsma JWJ, Broere F, van Eden W, Prakken BJ. T cell recognition of naturally presented epitopes of self-heat shock protein 70. Cell Stress Chaperones 2014; 19:569-78. [PMID: 24425585 PMCID: PMC4041940 DOI: 10.1007/s12192-013-0484-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 11/12/2013] [Accepted: 12/04/2013] [Indexed: 12/01/2022] Open
Abstract
Self-reactive T cells have shown to have a potential role as regulators of the immune system preventing or even suppressing autoimmunity. One of the most abundant proteins that can be eluted from human HLA molecules is heat shock protein 70 (HSP70). The aims of the current study are to identify HSP70 epitopes based on published HLA elution studies and to investigate whether T cells from healthy individuals may respond to such self-epitopes. A literature search and subsequent in silico binding prediction based on theoretical MHC binding motifs resulted in the identification of seven HSP70 epitopes. PBMCs of healthy controls proliferated after incubation with two of the seven peptides (H167 and H290). Furthermore H161, H290, and H443 induced CD69 expression or production of cytokines IFNγ or TNFα in healthy controls. The identification of these naturally presented epitopes and the response they elicit in the normal immune system make them potential candidates to study during inflammatory conditions as well as in autoimmune diseases.
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Affiliation(s)
- Huib de Jong
- />Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Eva C. Koffeman
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Jennifer M. Meerding
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Rianne C. Scholman
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Lotte Wieten
- />Department of Infectious Diseases and Immunology, Division of Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Wilco de Jager
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Mark Klein
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Henny Otten
- />Department of Immunology, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands
| | - Femke van Wijk
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
| | - Ruurd van der Zee
- />Department of Infectious Diseases and Immunology, Division of Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Johannes W. J. Bijlsma
- />Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Femke Broere
- />Department of Infectious Diseases and Immunology, Division of Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Willem van Eden
- />Department of Infectious Diseases and Immunology, Division of Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Berent J. Prakken
- />Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Huispostnummer KE 04.131.1, Postbus 85090, 3508 AB Utrecht, The Netherlands
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12
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Espinosa G, Collado JA, Scholz E, Mestre-Ferrer A, Kuse N, Takiguchi M, Carrascal M, Canals F, Pujol-Borrell R, Jaraquemada D, Alvarez I. Peptides presented by HLA class I molecules in the human thymus. J Proteomics 2013; 94:23-36. [PMID: 24029068 DOI: 10.1016/j.jprot.2013.08.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 12/31/2022]
Abstract
UNLABELLED The thymus is the organ in which T lymphocytes mature. Thymocytes undergo exhaustive selection processes that require interactions between the TCRs and peptide-HLA complexes on thymus antigen-presenting cells. The thymic peptide repertoire associated with HLA molecules must mirror the peptidome that mature T cells will encounter at the periphery, including peptides that arise from tissue-restricted antigens. The transcriptome of specific thymus cell populations has been widely studied, but there are no data on the HLA-I peptidome of the human thymus. Here, we describe the HLA-I-bound peptide repertoire from thymus samples, showing that it is mostly composed of high-affinity ligands from cytosolic and nuclear proteins. Several proteins generated more than one peptide, and some redundant peptides were found in different samples, suggesting the existence of antigen immunodominance during the processes that lead to central tolerance. Three HLA-I ligands were found to be derived from proteins expressed by stromal cells, including one from the protein TBATA (or SPATIAL), which is present in the thymus, brain and testis. The expression of TBATA in medullary thymic epithelial cells has been reported to be AIRE dependent. Thus, this report describes the first identification of a thymus HLA-I natural ligand derived from an AIRE-dependent protein with restricted tissue expression. BIOLOGICAL SIGNIFICANCE We present the first description of the HLA-I-bound peptide repertoire from ex vivo thymus samples. This repertoire is composed of standard ligands from cytosolic and nuclear proteins. Some peptides seem to be dominantly presented to thymocytes in the thymus. Most importantly, some HLA-I associated ligands derived from proteins expressed by stromal cells, including one peptide, restricted by HLA-A*31:01, arising from an AIRE-dependent protein with restricted tissue expression.
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Affiliation(s)
- Gabriel Espinosa
- Immunology Unit, Department of Cell Biology, Physiology and Immunology and Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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13
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Muazzam AG, Mansoor A, Ali L, Siddiqi S, Hameed A, Ajmal M, Mazhar K. Association of HLA-DRB1 and -DQB1alleles and haplotypes with rheumatoid arthritis in a Pakistani population. Arthritis Res Ther 2013; 15:R95. [PMID: 23968403 PMCID: PMC3978885 DOI: 10.1186/ar4275] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 08/22/2013] [Indexed: 12/02/2022] Open
Abstract
Introduction Rheumatoid arthritis is an autoimmune disease with poorly understood pathophysiology. Genetic components of disease etiology, especially human leukocyte antigen (HLA) associations, are well known. Ethnic differences account for a number of variations in disease association with the HLA locus and there seem to be differences in various studies regarding its genetic predisposition. This study was aimed at determining the contribution of DRB1 and DQB1 components of HLA class II in rheumatoid arthritis in a Pakistani cohort. Method For this study, 110 patients and 120 healthy controls from the same geographical area and matched ethnicity were enrolled. Blood DNA was isolated from all the subjects and HLA alleles were typed following allele specific amplification. Subsequently, haplotypes were generated and allelic and haplotype distribution frequencies were compared among the patients and controls using χ2 and Arlequin software. The data obtained by this analysis were also compared with other reported associations found in the Pakistani population by meta-analysis. Results HLA allelic status was determined among the patients and controls from the same geographical area to account for differences in ethnicity and environmental factors. Significant associations were found for alleles as well as haplotypes among the patients of rheumatoid arthritis. DRB1*10, DQB1*05 and DQB1*602 were found to be associated with disease susceptibility, whereas DRB1*11 and DQB1*02 had protective effect against the disease. Similarly, haplotype DRB1*10-DQB1*05 was associated disease risk, whereas DRB1*07-DQB1*02 and DRB1*11-DQB1*0301 had a protective effect. Conclusion There is a significant DRB1and DQB1 allele and haplotype association with rheumatoid arthritis susceptibility and protection.
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14
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Collado JA, Alvarez I, Ciudad MT, Espinosa G, Canals F, Pujol-Borrell R, Carrascal M, Abian J, Jaraquemada D. Composition of the HLA-DR-associated human thymus peptidome. Eur J Immunol 2013; 43:2273-82. [PMID: 23719902 DOI: 10.1002/eji.201243280] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/17/2013] [Accepted: 05/27/2013] [Indexed: 11/05/2022]
Abstract
Major histocompatibility complex class II (MHC-II) molecules bind to and display antigenic peptides on the surface of antigen-presenting cells (APCs). In the absence of infection, MHC-II molecules on APCs present self-peptides and interact with CD4(+) T cells to maintain tolerance and homeostasis. In the thymus, self-peptides bind to MHC-II molecules expressed by defined populations of APCs specialised for the different steps of T-cell selection. Cortical epithelial cells present peptides for positive selection, whereas medullary epithelial cells and dendritic cells are responsible for peptide presentation for negative selection. However, few data are available on the peptides presented by MHC molecules in the thymus. Here, we apply mass spectrometry to analyse and identify MHC-II-associated peptides from five fresh human thymus samples. The data show a diverse self-peptide repertoire, mostly consisting of predicted MHC-II high binders. Despite technical limitations preventing single cell population analyses of peptides, these data constitute the first direct assessment of the HLA-II-bound peptidome and provide insight into how this peptidome is generated and how it drives T-cell repertoire formation.
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Affiliation(s)
- Javier A Collado
- Immunology Unit, Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona, Barcelona, Spain; Departament de Biologia Cel·lular, Fisiologia i Immunologia (BCFI), Universitat Autònoma de Barcelona, Barcelona, Spain
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15
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van Eden W, van Herwijnen M, Wagenaar J, van Kooten P, Broere F, van der Zee R. Stress proteins are used by the immune system for cognate interactions with anti-inflammatory regulatory T cells. FEBS Lett 2013; 587:1951-8. [PMID: 23707418 DOI: 10.1016/j.febslet.2013.05.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/07/2013] [Accepted: 05/07/2013] [Indexed: 01/21/2023]
Abstract
Since the initial discovery of the protective role of heat shock protein (HSP) 60 in arthritis, T cell recognition of endogenous HSP was found to be one of the possible underlying mechanisms. Recently we have uncovered potent disease-suppressive Tregs (anti-inflammatory immunosuppressive T cells) recognizing HSP70 self-antigens, and enabling selective targeting of such Tregs to inflamed tissues. HSP70 is a major contributor to the major histocompatibility complex (MHC) Class II ligandome and we have shown that a conserved HSP70-epitope (B29) is abundantly present in murine MHC Class II. Upon transfer, B29-induced CD4+CD25+Foxp3+T cells suppressed established proteoglycan-induced arthritis (PGIA) in mice. These self-antigen specific Tregs were activated in vivo and as little as 4.000 cells sufficed to fully inhibit arthritis. Furthermore, in vivo depletion of transferred Tregs abrogated disease suppression. Given that B29 can be presented by most human MHC class II molecules and that B29 inhibited arthritis in HLA-DQ8 (human MHC) transgenic mice, we feel that therapeutic vaccination with selected HSP peptides can be an effective route for induction of anti-inflammatory Tregs as a novel intervention in chronic inflammatory diseases.
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Affiliation(s)
- Willem van Eden
- Division of Immunology, Dept. Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Yalelaan 1, 3584 CL Utrecht, The Netherlands.
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16
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Muixí L, Contreras V, Collado JA, Alexandre Y, Ballingall K, Bonneau M, Jaraquemada D, Schwartz-Cornil I. Unraveling features of the natural MHC class II peptidome of skin-migrated dendritic cells. Int Immunol 2011; 24:59-69. [PMID: 22194283 DOI: 10.1093/intimm/dxr096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dendritic cells (DCs) migrating from peripheral tissues at steady state are considered the most efficient antigen-presenting cells (APCs) involved in the induction of peripheral T-cell tolerance via self-antigen presentation on MHC class II molecules. However, difficulties in obtaining sufficient numbers of such DCs have precluded previous analyses of their natural MHC class II peptidome in laboratory animals or humans. Here, we overcome this difficulty by collecting the large quantities of sheep DCs that migrate from the skin via the afferent lymphatics at steady state to the draining lymph node. We compared the repertoire of MHC class II-bound peptides from afferent lymph DCs with autologous APCs derived from peripheral blood. A large fraction of the MHC class II peptidome from skin DCs was derived from membrane-recycling proteins (59%) and from proteins of the antigen presentation machinery (50%), whereas these types of peptides constituted a more limited fraction in blood APCs (21 and 11%, respectively). One sheep cytokeratin peptide was identified in the skin DC peptidome indicating active processing of epithelium-derived antigens. Conversely, peptides derived from cytosolic and soluble antigens of the extracellular milieu were more represented in blood APCs than skin DCs. The biased peptidome of skin-migrated DCs indicates that these cells express a peptide repertoire for the generation of self-reactive and/or regulatory T cells mainly directed toward DC molecules from internal and external membranes and to a lesser extent toward antigens of the extracellular milieu, including some tissue-specific peptides.
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Affiliation(s)
- Laia Muixí
- Immunology Unit, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona, Spain
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Yoon HK, Chung IH, Kim HJ, Lee KO, Kim JS, Park EJ, Song SY, Bang SI, Kim TS, Hwang SY. Development of simple and rapid HLA-C genotyping method using an oligonucleotide microarray. BIOCHIP JOURNAL 2011. [DOI: 10.1007/s13206-011-5310-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Muixí L, Gay M, Muñoz-Torres PM, Guitart C, Cedano J, Abian J, Alvarez I, Jaraquemada D. The peptide-binding motif of HLA-DR8 shares important structural features with other type 1 diabetes-associated alleles. Genes Immun 2011; 12:504-12. [PMID: 21654843 DOI: 10.1038/gene.2011.26] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The objective of this study was to characterize the peptide-binding motif of the major histocompatibility complex (MHC) class II HLA-DR8 molecule included in the type 1 diabetes-associated haplotype DRB1(*)0801-DQA1(*)0401/DQB1(*)0402 (DR8-DQ4), and compare it with that of other diabetes-associated MHC class II alleles; DR8-bound peptides were eluted from an HLA-DR homozygous lymphoblastoid cell line. The repertoire was characterized by peptide sequencing using a LTQ ion trap mass spectrometer coupled to a multidimensional liquid chromatography system. After validation of the spectra identification, the definition of the HLA-DR8 peptide-binding motif was achieved from the analysis of 486 natural ligands, based on serial alignments of all possible HLA-DR-binding cores. The DR8 motif showed a strong similarity with the peptide-binding motifs of other MHC class II diabetes-associated alleles, HLA-DQ8 and H-2 I-A(g7). Similar to HLA-DQ8 and H-2 I-A(g7), HLA-DR8 preferentially binds peptides with an acidic residue at position P9 of the binding core, indicating that DR8 is the susceptibility component of the DR8-DQ4 haplotype. Indeed, some DR8 peptides were identical to peptides previously identified as DQ8- or I-A(g7) ligands, and several diabetes-specific peptides associated with DQ8 or I-A(g7) could theoretically bind to HLA-DR8. These data further strengthen the association of HLA-DR8 with type I diabetes.
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Affiliation(s)
- L Muixí
- Department of Cell Biology, Physiology and Immunology, Immunology Unit, Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, Barcelona, Spain
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Uçar F, Çapkin E, Karkucak M, Yücel B, Sönmez M, Alver A, Kaklikkaya N, Tosun M, Alemdaroğlu E, Solak M. Associations of HLA-DRB1 alleles with anti-citrullinated protein antibody-positive and anti-citrullinated protein antibody-negative rheumatoid arthritis in northern east part of Turkey. Int J Rheum Dis 2011; 15:538-45. [PMID: 23253237 DOI: 10.1111/j.1756-185x.2011.01604.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
AIM The aim of this study was to investigate the associations between human leukocyte antigen (HLA)-DRB1 alleles with genetic susceptibility to rheumatoid arthritis (RA) and production of antibodies against cyclic citrullinated peptide (anti-CCP antibody) and rheumatoid factor (RF) in Turkish RA patients. METHODS We studied 291 RA patients and 253 controls. Genotyping was performed by polymerase chain reaction with sequence-specific oligonucleotide probes hybridization method. Serum levels of anti-CCP antibody, IgM-RF and high sensitive C-reactive protein titers were measured by commercial kits using immunological methods. RESULTS We found that HLA-DRB1*04 and *09 alleles were associated in anti-CCP+ and anti-CCP+ RA patients (P < 0.0001 and P < 0.001, respectively), while DRB1*01 and *04 were determined to be higher in RF+ RA patients (P < 0.001 and P < 0.0001, respectively). Moreover, DRB1*11 and DRB1*13 alleles were determined to be lower in RF and anti-CCP/RF+ RA patients (P < 0.001 for both). HLA-DRB1*04 was identified as a common responsible allele for susceptibility to the disease in anti-CCP, RF and anti-CCP/RF- RA patients (P = 0.0018, P = 0.0004 and P = 0.0023, respectively). HLA-DRB1*13 allele alone was found to be protective against to anti-CCP+ and RF- RA (P = 0.0003 and P = 0.006, respectively). On the contrary, there was no protective allele in anti-CCP/RF- RA as well as anti-CCP- RA patients. CONCLUSION This study indicates that associate and protective HLA-DRB1 allele distributions are different in autoantibody (anti-CCP or RF or anti-CCP/RF)+ RA and autoantibody- RA patients, with exceptions of DRB1*04 and DRB1*13.
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Affiliation(s)
- Fahri Uçar
- Departments of Medical Biology & Genetics, Karadeniz Technical University, Trabzon, Turkey.
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HLA-DRB1 allele distribution and its relation to rheumatoid arthritis in eastern Black Sea Turkish population. Rheumatol Int 2011; 32:1003-7. [PMID: 21246357 DOI: 10.1007/s00296-010-1792-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 12/31/2010] [Indexed: 12/24/2022]
Abstract
Rheumatoid arthritis (RA [MIM 180300]) is a complex, polygenic inflammatory autoimmune disease, resulting from interactions between genetic and environmental factors. Some of the RA-associated HLA-DRB1 alleles have shared epitope, but their distribution varies among different racial/ethnic groups. This study was aimed at investigating the distribution of HLA-DRB1 alleles in patients with RA in eastern Black Sea region of Turkey. DNA samples of 320 patients with RA and 360 healthy controls were studied for the determination of HLA-DRB1 allele distribution using PCR-SSP method. The allele frequencies of HLA-DRB1*01, *04, and *09 were higher in patients with RA compared with the controls (P < 0.005, P < 0.0001, and P < 0.01, respectively). On the other hand, in patients with RA, HLA-DRB1*13 allele was lower than the controls (P < 0.001). Of the HLA-DRB1*04 subgroups, *0401 (40.83% vs. 18.75%, P < 0.001) was the most frequent allele in patients with RA, while DRB1*0402 (30.00% vs. 12.50%, P < 0.005) allele in the controls. HLA-DRB1 allele frequencies in the patients with RA and the controls showed Hardy-Weinberg rule compliance. Results of this study indicate that HLA-DRB1*01, *04, and *09 alleles were associated with RA, and HLA-DRB1*13 was protective allele against RA. Among the subgroups of HLA-DRB1*04, *0401 was detected to be RA associated, while *0402 was being protective. These results have some differences compared with previous reports originating from other regions of Turkey.
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Liu B, Xiong Y, Tian C, Zhong Y, Liu SM. The complete genomic sequence of HLA-DRB1*10:01:01 was identified by sequencing in a Han Chinese individual. ACTA ACUST UNITED AC 2011; 77:159-60. [DOI: 10.1111/j.1399-0039.2010.01593.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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James EA, Moustakas AK, Bui J, Papadopoulos GK, Bondinas G, Buckner JH, Kwok WW. HLA-DR1001 presents "altered-self" peptides derived from joint-associated proteins by accepting citrulline in three of its binding pockets. ACTA ACUST UNITED AC 2010; 62:2909-18. [PMID: 20533291 DOI: 10.1002/art.27594] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE HLA-DRB1*1001 (DR1001) is a shared epitope allele associated with rheumatoid arthritis (RA). The present study was undertaken to assess the capacity of DR1001 to accommodate citrulline in its binding pockets and to identify citrullinated T cell epitopes derived from joint-associated proteins. METHODS The binding of peptide derivatives containing citrulline, arginine, and other amino acid substitutions was measured. A prediction algorithm was developed to identify arginine-containing sequences from joint-associated proteins that preferentially bind to DR1001 upon citrullination. Unmodified and citrullinated versions of these sequences were synthesized and were utilized to stimulate CD4+ T cells from healthy subjects and RA patients. Responses were measured by class II major histocompatibility complex tetramer staining and confirmed by isolating CD4+ T cell clones. RESULTS DR1001 accepted citrulline, but not arginine, in 3 of its anchoring pockets. The prediction algorithm identified sequences that preferentially bound to DR1001 with arginine replaced by citrulline. Three of these sequences elicited CD4+ T cell responses. T cell clones specific for these sequences proliferated only in response to citrullinated peptides. CONCLUSION Conversion of arginine to citrulline generates "altered-self" peptides that can be bound and presented by DR1001. Responses to these peptides implicate the corresponding proteins (fibrinogen α, fibrinogen β, and cartilage intermediate-layer protein) as relevant antigens. The finding of preferential responses to citrullinated sequences suggests that altered peptide binding affinity due to this posttranslational modification may be an important factor in the initiation or progression of RA. As such, measuring responsiveness to these peptides may be useful for immunologic monitoring.
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Affiliation(s)
- Eddie A James
- Benaroya Research Institute at Virginia Mason, Seattle, Washington, USA
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23
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Colomé N, Collado J, Bech-Serra JJ, Liiv I, Antón LC, Peterson P, Canals F, Jaraquemada D, Alvarez I. Increased apoptosis after autoimmune regulator expression in epithelial cells revealed by a combined quantitative proteomics approach. J Proteome Res 2010; 9:2600-9. [PMID: 20218732 DOI: 10.1021/pr100044d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) is a rare autosomal recessive autoimmune disease, affecting many endocrine tissues. APECED is associated to the lack of function of a single gene called AutoImmune REgulator (AIRE). Aire knockout mice develop various autoimmune disorders affecting different organs, indicating that Aire is a key gene in the control of organ-specific autoimmune diseases. AIRE is mainly expressed by medullary thymic epithelial cells (mTECs), and its absence results in the loss of tolerance against tissue restricted antigens (TRAs). Aire induces the transcription of genes encoding for TRAs in mTECs. In this report, the analysis of AIRE's effect on the cellular proteome was approached by the combination of two quantitative proteomics techniques, 2D-DIGE and ICPL, using an AIRE-transfected and nontransfected epithelial cell line. The results showed increased levels of several chaperones, (HSC70, HSP27 and tubulin-specific chaperone A) in AIRE-expressing cells, while various cytoskeleton interacting proteins, that is, transgelin, caldesmon, tropomyosin alpha-1 chain, myosin regulatory light polypeptide 9, and myosin-9, were decreased. Furthermore, some apoptosis-related proteins were differentially expressed. Data were confirmed by Western blot and flow cytometry analysis. Apoptosis assays with annexin V and etoposide demonstrated that AIRE-positive cells suffer more spontaneous apoptosis and are less resistant to apoptosis induction.
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Affiliation(s)
- Nuria Colomé
- Vall d'Hebron University Hospital, Barcelona, Spain
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Hinrichs J, Föll D, Bade-Döding C, Huyton T, Blasczyk R, Eiz-Vesper B. The nature of peptides presented by an HLA class I low expression allele. Haematologica 2010; 95:1373-80. [PMID: 20220067 DOI: 10.3324/haematol.2009.016089] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The functional integrity of human leukocyte antigen low expression variants is a prerequisite for considering them as essential in the matching process of hematopoietic stem cell donors and recipients to diminish the risk of serious complications such as graft-versus-host disease or graft rejection. The HLA-A*3014L variant has a disulfide bridge missing in the alpha2 domain which could affect peptide binding and presentation to T cells. DESIGN AND METHODS HLA-A*3014L and HLA-A*3001 were expressed as truncated variants and peptides were eluted and subjected to pool sequencing by Edman degradation as well as to single-peptide sequencing by mass spectrometry. Quantitative analysis of binding peptides presented in vivo was performed by a flow cytometric peptide-binding assay using HLA-A*3001 and HLA-A*3014L-expressing B-LCLs. RESULTS The truncated HLA-A*3014L protein was secreted in the supernatant and it was possible to elute and sequence peptides. Sequence analysis of these eluted peptides revealed no relevant differences to the peptide motif of HLA-A*3001, indicating that the Cys164Ser substitution does not substantially alter the spectrum of presented peptides. Strong binding of one of the shared in vivo identified HLA-A*3001/3014L ligands was confirmed in the peptide-binding assay. CONCLUSIONS This study is the first to demonstrate that HLA low expression variants are able to present peptides and, thus, can be considered as functionally active. When comparing peptide motifs, it is likely that HLA-A*3014L and HLA-A*3001 represent a permissive mismatch with low allogenicity in hematopoietic stem cell transplantation. These results indicate that surface expression, as well as peptide-binding data of HLA variants with similar disulfide bridge variations (e.g. HLA-A*3211Q) need to be considered as functionally active in an allogeneic hematopoietic stem cell transplantation setting as long as the opposite has not been shown. Otherwise a relevant but not considered HLA mismatch could result in a severe allogeneic T-cell response and graft-versus-host disease.
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Affiliation(s)
- Jan Hinrichs
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
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Muixí L, Alvarez I, Jaraquemada D. Peptides presented in vivo by HLA-DR in thyroid autoimmunity. Adv Immunol 2008; 99:165-209. [PMID: 19117535 DOI: 10.1016/s0065-2776(08)00606-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The association of the major histocompatibility complex (MHC) genes with autoimmune diseases together with the ectopic expression of class II molecules by epithelial cells of the target tissue gives to these molecules a central role in the pathogenesis of the disease, in its regulation and in the persistence of the immune response in situ. HLA-DR molecules expressed by thyroid follicular cells in thyroid autoimmune diseases are compact molecules stably associated with peptides. The nature of these peptides is of vital importance in the understanding of the disease, since these MHC-II-peptide complexes are going to be recognized by both effector and regulatory T cells in situ. In this chapter, we review the current state of the analysis of naturally processed peptides presented by MHC class II molecules in the context of autoimmunity and we discuss our data of natural HLA-DR ligands eluted from Graves' disease affected thyroid glands, from where autoantigen-derived peptides have been identified.
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Affiliation(s)
- Laia Muixí
- Immunology Unit, Institut de Biotechnologia i Biomedicina, Universitat Autònoma de Barcelona, Campus de Bellaterra, Barcelona, Spain
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