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Villellas C, Stevenaert F, Remmerie B, Andries K. Sub-MIC levels of bedaquiline and clofazimine can select Mycobacterium tuberculosis mutants with increased MIC. Antimicrob Agents Chemother 2024; 68:e0127523. [PMID: 38470194 PMCID: PMC10989023 DOI: 10.1128/aac.01275-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 02/18/2024] [Indexed: 03/13/2024] Open
Abstract
Multidrug-resistant tuberculosis (MDR-TB) patients not cured at the time of stopping treatment are exposed to Minimum Inhibitory Concentration (MIC) and sub-MIC levels for many months after discontinuing bedaquiline (BDQ) or clofazimine (CFZ) treatment. In vitro cultures treated with BDQ and CFZ sub-MIC concentrations clearly showed enrichment in the Rv0678 mutant population, demonstrating that pre-existing Rv0678 mutants can be selected by sub-MIC concentrations of BDQ and CFZ if not protected by an alternative MDR-TB treatment.
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Affiliation(s)
| | | | | | - Koen Andries
- Janssen Research and Development, Beerse, Belgium
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Cetin M, Pinamonti V, Schmid T, Boschert T, Mellado Fuentes A, Kromer K, Lerner T, Zhang J, Herzig Y, Ehlert C, Hernandez-Hernandez M, Samaras G, Torres CM, Fisch L, Dragan V, Kouwenhoven A, Van Schoubroeck B, Wils H, Van Hove C, Platten M, Green EW, Stevenaert F, Felix NJ, Lindner JM. T-FINDER: A highly sensitive, pan-HLA platform for functional T cell receptor and ligand discovery. Sci Adv 2024; 10:eadk3060. [PMID: 38306432 PMCID: PMC10836725 DOI: 10.1126/sciadv.adk3060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 01/03/2024] [Indexed: 02/04/2024]
Abstract
Effective, unbiased, high-throughput methods to functionally identify both class II and class I HLA-presented T cell epitopes and their cognate T cell receptors (TCRs) are essential for and prerequisite to diagnostic and therapeutic applications, yet remain underdeveloped. Here, we present T-FINDER [T cell Functional Identification and (Neo)-antigen Discovery of Epitopes and Receptors], a system to rapidly deconvolute CD4 and CD8 TCRs and targets physiologically processed and presented by an individual's unmanipulated, complete human leukocyte antigen (HLA) haplotype. Combining a highly sensitive TCR signaling reporter with an antigen processing system to overcome previously undescribed limitations to target expression, T-FINDER both robustly identifies unknown peptide:HLA ligands from antigen libraries and rapidly screens and functionally validates the specificity of large TCR libraries against known or predicted targets. To demonstrate its capabilities, we apply the platform to multiple TCR-based applications, including diffuse midline glioma, celiac disease, and rheumatoid arthritis, providing unique biological insights and showcasing T-FINDER's potency and versatility.
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Affiliation(s)
- Miray Cetin
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Veronica Pinamonti
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Theresa Schmid
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Tamara Boschert
- Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
- DKTK CCU Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Helmoltz Institute for Translational Oncology (HI-TRON), Heidelberg, Germany
| | | | - Kristina Kromer
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Taga Lerner
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Jing Zhang
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Yonatan Herzig
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Christopher Ehlert
- Heidelberg Institute for Theoretical Studies (HITS gGmbH), 69118 Heidelberg, Germany
| | | | - Georgios Samaras
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | | | - Laura Fisch
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Valeriia Dragan
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | | | | | - Hans Wils
- Janssen Research and Development, Beerse, Belgium
| | | | - Michael Platten
- DKTK CCU Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Helmoltz Institute for Translational Oncology (HI-TRON), Heidelberg, Germany
- Department of Neurology, Medical Faculty Mannheim, MCTN Heidelberg University, Mannheim, Germany
| | - Edward W. Green
- DKTK CCU Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Department of Neurology, Medical Faculty Mannheim, MCTN Heidelberg University, Mannheim, Germany
| | | | | | - John M. Lindner
- BioMed X GmbH, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
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3
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Turcinov S, Af Klint E, Van Schoubroeck B, Kouwenhoven A, Mia S, Chemin K, Wils H, Van Hove C, De Bondt A, Keustermans K, Van Houdt J, Reumers J, Felix N, Rao NL, Peeters P, Stevenaert F, Klareskog L, McKinnon M, Baker D, Suri A, Malmström V. Diversity and Clonality of T Cell Receptor Repertoire and Antigen Specificities in Small Joints of Early Rheumatoid Arthritis. Arthritis Rheumatol 2022; 75:673-684. [PMID: 36409582 DOI: 10.1002/art.42407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 07/17/2022] [Accepted: 11/08/2022] [Indexed: 11/23/2022]
Abstract
OBJECTIVE CD4+ T cells are implicated in rheumatoid arthritis (RA) pathology from the strong association between RA and certain HLA class II gene variants. This study was undertaken to examine the synovial T cell receptor (TCR) repertoire, T cell phenotypes, and T cell specificities in small joints of RA patients at time of diagnosis before therapeutic intervention. METHODS Sixteen patients, of whom 11 patients were anti-citrullinated protein antibody (ACPA)-positive and 5 patients were ACPA-, underwent ultrasound-guided synovial biopsy of a small joint (n = 13) or arthroscopic synovial biopsy of a large joint (n = 3), followed by direct sorting of single T cells for paired sequencing of the αβ TCR together with flow cytometry analysis. TCRs from expanded CD4+ T cell clones of 4 patients carrying an HLA-DRB1*04:01 allele were artificially reexpressed to study antigen specificity. RESULTS T cell analysis demonstrated CD4+ dominance and the presence of peripheral helper T-like cells in both patient groups. We identified >4,000 unique TCR sequences, as well as 225 clonal expansions. Additionally, T cells with double α-chains were a recurring feature. We identified a biased gene usage of the Vβ chain segment TRBV20-1 in CD4+ cells from ACPA+ patients. In vitro stimulation of T cell lines expressing selected TCRs with an extensive panel of citrullinated and viral peptides identified several different virus-specific TCRs (e.g., human cytomegalovirus and human herpesvirus 2). Still, the majority of clones remained orphans with unknown specificity. CONCLUSION Minimally invasive biopsies of the RA synovium allow for single-cell TCR sequencing and phenotyping. Clonally expanded, viral-reactive T cells account for part of the diverse CD4+ T cell repertoire. TRBV20-1 bias in ACPA+ patients suggests recognition of common antigens.
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Affiliation(s)
- Sara Turcinov
- Division of Rheumatology, Department of Medicine Solna, Center for Molecular Medicine, Karolinska University Hospital and Karolinska Institutet, and Theme of Inflammation and Ageing, Medical Unit Gastro, Derma, Rheuma, Karolinska University Hospital, Solna, Sweden
| | - Erik Af Klint
- Theme of Inflammation and Ageing, Medical Unit Gastro, Derma, Rheuma, Karolinska University Hospital, Solna, Sweden
| | | | | | - Sohel Mia
- Division of Rheumatology, Department of Medicine Solna, Center for Molecular Medicine, Karolinska University Hospital and Karolinska Institutet, Solna, Sweden
| | - Karine Chemin
- Division of Rheumatology, Department of Medicine Solna, Center for Molecular Medicine, Karolinska University Hospital and Karolinska Institutet, Solna, Sweden
| | - Hans Wils
- Janssen Research and Development, Beerse, Belgium
| | | | - An De Bondt
- Janssen Research and Development, Beerse, Belgium
| | | | | | - Joke Reumers
- Janssen Research and Development, Beerse, Belgium
| | - Nathan Felix
- Janssen Research and Development, Spring House, Pennsylvania
| | - Navin L Rao
- Janssen Research and Development, Horsham, Pennsylvania
| | | | | | - Lars Klareskog
- Division of Rheumatology, Department of Medicine Solna, Center for Molecular Medicine, Karolinska University Hospital and Karolinska Institutet, Solna, Sweden
| | | | - Daniel Baker
- Janssen Research and Development, Spring House, Pennsylvania
| | - Anish Suri
- Janssen Research and Development, Beerse, Belgium
| | - Vivianne Malmström
- Division of Rheumatology, Department of Medicine Solna, Center for Molecular Medicine, Karolinska University Hospital and Karolinska Institutet, Solna, Sweden
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Swift J, Stanway J, Nicorescu I, Hilkens C, Stevenaert F, Anderson A, Pratt A, Isaacs JD. AB0025 CITRULLINATED-PEPTIDE SPECIFIC CD4+ T CELL RESPONSES IN RHEUMATOID ARHRITIS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:CD4+ T cells reacting to post-translationally modified, citrullinated self-antigens are thought to play a central role in the pathogenesis of rheumatoid arthritis (RA)1. This is evidenced by a strong HLA class II association, the success of therapeutic co-stimulation blockade and the detection of autoantigen specific T-cells using HLA class II multimers2. These cells may represent a target for antigen-specific, tolerogenic therapies and their in-depth phenotyping may provide the means by which to monitor such treatment.Objectives:To identify the citrullinated-peptide (cit-peptide) induced cytokine repertoire of antigen-specific memory CD4+ T cells in both healthy controls (HCs) and ACPA positive RA patients using intracellular cytokine staining and flow cytometry. Of note, the HLA-types of both HCs and RA patients were not known.Methods:Cryopreserved peripheral blood mononuclear cells (PBMC) from both HCs (n = 8) and RA patients (n = 13) with both early (untreated) and established disease were thawed and labelled with a proliferation tracking dye (PTD). Labelled PBMC were then either incubated alone or with a pool of cit-peptides for 9-days, followed by a 5-hour restimulation with PMA and ionomycin, where cytokine secretion was blocked for the final 4-hours using brefeldin-A. Cells were then harvested, permeabilised and stained for T cell surface markers and intracellular cytokines including IFN-γ, IL-4, IL-21 and IL-17. Stained cells were immediately acquired using a BD Fortessa X20, where antigen-specific CD4+ T cells were identified as the viable CD45RO+ (memory) CD4+ T cell population that had proliferated (PTDlow) in response to the cit-peptides. Stimulation indices (SI) were calculated as the percentage of proliferated memory CD4+ T cells in the stimulated wells divided by the percentage in the unstimulated conditions, and cit-peptide responders were defined as those with an SI > 2.0. Net cytokine production was measured by subtracting the percentage cytokine production from unstimulated CD4+ CD45RO+ PTDlow cells, from those stimulated with the cit-peptides.Results:Comparable proliferative responses were observed in both donor groups in response to stimulation with the cit-peptide pool, where 37 % of HCs and 31 % of RA patients responded with an SI > 2.0 (Fig. 1A). While little cytokine production was observed in the cit-peptide responding HC T cells, for responding RA donors, cit-peptide responsive CD4+ memory T cells were predominantly IFN-γ and IL-21 producing (Fig. 1B and 1C). In contrast, these donors did not produce significant levels of either IL-17 or IL-4 (Fig. 1D and 1E).Conclusion:Cit-peptides were able to induce proliferation in both HCs and RA memory CD4+ T cells which, amongst the RA donors only, were of a Th1/Tfh subtype. In contrast, and while based only on a small sample, cit-peptides did not induce either IL-17 or IL-4 production in either donor group, suggesting a lack of Th17/Th2 responses. Not all donors responded to the peptide pool, possibly reflecting the limited number of pooled cit-peptides or to a lack of confirmed HLA-DRB1*04:01 positive donors, as peptides were selected for their specificity on this basis. Future work will therefore include HLA-typing, as well as the inclusion of additional citrullinated-epitopes to demonstrate autoreactivity in a wider cross-section of patients. Further phenotyping of the cit-peptide specific T cells will be performed, and future plans will be to study the assay data alongside clinical outcomes to assess its value for immune monitoring.References:[1]Malmström, V et al Nat Rev Immunol. 2017; 17(1):60-75.[2]Gerstner, C et al BMC Immunol. 2020; 21(27):1-14.Disclosure of Interests:Jessica Swift: None declared, James Stanway: None declared, Ioana Nicorescu: None declared, Catharien Hilkens: None declared, Frederik Stevenaert Employee of: Janssen, Amy Anderson Grant/research support from: Pfizer, GSK and Janssen, Arthur Pratt Grant/research support from: Pfizer, GSK and Janssen, John D Isaacs Speakers bureau: Abbvie, Gilead, Roche, UC, Consultant of: Abbvie, Gilead, Roche, UC, Grant/research support from: Pfizer, GSK and JanssenFigure 1.Citrullinated-peptide specific memory CD4+ T cell proliferation (A) and net % cytokine production of IFN-γ (B), IL-21 (C), IL-17 (D) and IL-4 (E) positive cells.
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Lim JJ, Jones CM, Loh TJ, Ting YT, Zareie P, Loh KL, Felix NJ, Suri A, McKinnon M, Stevenaert F, Sharma RK, Klareskog L, Malmström V, Baker DG, Purcell AW, Reid HH, La Gruta NL, Rossjohn J. The shared susceptibility epitope of HLA-DR4 binds citrullinated self-antigens and the TCR. Sci Immunol 2021; 6:6/58/eabe0896. [PMID: 33863750 DOI: 10.1126/sciimmunol.abe0896] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 03/18/2021] [Indexed: 12/11/2022]
Abstract
Individuals expressing HLA-DR4 bearing the shared susceptibility epitope (SE) have an increased risk of developing rheumatoid arthritis (RA). Posttranslational modification of self-proteins via citrullination leads to the formation of neoantigens that can be presented by HLA-DR4 SE allomorphs. However, in T cell-mediated autoimmunity, the interplay between the HLA molecule, posttranslationally modified epitope(s), and the responding T cell repertoire remains unclear. In HLA-DR4 transgenic mice, we show that immunization with a Fibβ-74cit69-81 peptide led to a population of HLA-DR4Fibβ-74cit69-81 tetramer+ T cells that exhibited biased T cell receptor (TCR) β chain usage, which was attributable to selective clonal expansion from the preimmune repertoire. Crystal structures of pre- and postimmune TCRs showed that the SE of HLA-DR4 represented a main TCR contact zone. Immunization with a double citrullinated epitope (Fibβ-72,74cit69-81) altered the responding HLA-DR4 tetramer+ T cell repertoire, which was due to the P2-citrulline residue interacting with the TCR itself. We show that the SE of HLA-DR4 has dual functionality, namely, presentation and a direct TCR recognition determinant. Analogous biased TCR β chain usage toward the Fibβ-74cit69-81 peptide was observed in healthy HLA-DR4+ individuals and patients with HLA-DR4+ RA, thereby suggesting a link to human RA.
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Affiliation(s)
- Jia Jia Lim
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Claerwen M Jones
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Tiing Jen Loh
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Yi Tian Ting
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Pirooz Zareie
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Khai L Loh
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Nathan J Felix
- Janssen Research & Development LLC, Horsham, Philadelphia, PA, USA
| | - Anish Suri
- Janssen Research & Development, Turnhoutseweg 30, BE-2340, Beerse, Belgium
| | - Murray McKinnon
- Janssen Research & Development LLC, Horsham, Philadelphia, PA, USA
| | | | - Ravi K Sharma
- Rheumatology Division, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, 17177 Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Division, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, 17177 Stockholm, Sweden
| | - Vivianne Malmström
- Rheumatology Division, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, 17177 Stockholm, Sweden
| | - Daniel G Baker
- Janssen Research & Development LLC, Horsham, Philadelphia, PA, USA
| | - Anthony W Purcell
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Hugh H Reid
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia. .,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Nicole L La Gruta
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia. .,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.,Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff CF14 4XN, UK
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Turcinov S, Af Klint E, De Bondt A, Mia MS, Catrina A, Stevenaert F, Malmström V. AB0045 ULTRASOUND GUIDED BIOPSIES OF RA JOINTS AT TIME OF CLINICAL DIAGNOSIS CONTAIN PROFOUND T CELL CLONALITIES. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Rheumatoid arthritis (RA) is a disease characterized by synovial joint inflammation, mainly affecting small joints. Histological findings in synovial biopsies ranges from inflammatory infiltration including ectopic lymphoid structures, to a cell sparse fibroid phenotype. T cells in affected joints are non-naïve and have by flow cytometry approaches been shown to have a wide TCR-beta chain gene usage. New technologies allow for analyses of paired TCR sequences and their antigen-specificities.Objectives:To study the alpha/beta-T cell receptor repertoire in single sorted T cells from synovial biopsies at time of RA-diagnosis.Meth ods:Synovial biopsies were taken, primarily using an ultrasound guided technique, from seventeen patients (12 ACPA+, 5 ACPA-) with rheumatoid arthritis. Fresh biopsies were enzymatically digested, followed by mild mechanical treatment, prior to flow cytometry cell sorting. Single cell index sorting of T cells was made into 384-well plates with PCR-buffer followed by a nested PCR and deep sequencing of the TCR amplicons. TCR-receptor sequences showing clonal expansion from four ACPA+ HLA-DRB1*0401 patients were further cloned into SKW3 cells for studies of their reactivity byin vitrostimulation with peptides of viral and citrullinated origin from the literature. A positive response, as measured by CD69-up regulation or IL-2 production, was used to define specificity.Results:Fourteen of the assessed joints were small (1 MTP, 4 MCP and 8 wrists), whereas the remaining three were large joints (2 knees and 1 ankle), table 1. Individual T cells could be isolated from all of these biopsies, with a variating CD4:CD8 ratio. Based on the flow cytometry phenotyping we could identify CD4 T cells of both Treg and T peripheral helper phenotype already at this early time point. Productive alpha/beta-TCR sequences could be retrieved from 16 out of 17 patients and clonal expansion (>1 copy/TCR) was seen in all but one of these patients, with clone sizes ranging between 2 – 34 copies of each TCR.Table 1.Patient characteristics.PatientsGender(F/M)HLA-SE allelesJointsJoint swelling prior to biopsy (months)Stiffness specific joint (median VAS)Pain specific joint (median VAS)ACPA+ (n = 12)9/3*0401, *0404, *0408, *01 and *101 MTP, 4 MCP, 6 wrists, 1 knee4 (1-12)a46 (0-84)45 (22-99)ACPA- (n = 5)3/2*04011 MCP, 2 wrists, 1 ankle, 1 knee5 (0.25-7)59 (15-73)47 (33-81)SKW3 cell lines(patients n = 4)4/0*0401/0404 n=2*0401 n=21 MTP, 3 wrists2 (1-6)50.5 (42-84)50 (40-99)aData not available for one patient. One patient with prior RA-diagnosis, but after 9 months of treatment remission lasting for 20 years.Artificial T cell lines were generated from the expanded clones of HLA-DRB1*04:01 RA subjects. Ourin vitrostimulation protocol identified virus specific CD4 T cells in all samples. So far, no citrulline reactivity has been found. HCMV, followed by HHV were the most commonly found viral reactivities, whereas others were found only in one donor (e.g. JCV, EBV). The majority of clones are thus “orphans”, to which we are still seeking the driving antigen.Conclusion:Clonally expanded T cells are found in the synovium of early RA patients and include virus-specific CD4+ T cells. Our data show that the local T cell repertoire is broad already at the time of RA diagnosisDisclosure of Interests:Sara Turcinov: None declared, Erik af Klint Paid instructor for: Abbvie (courses and lectures), An De Bondt Employee of: Janssen., Muhammad Sohel Mia: None declared, Anca Catrina: None declared, Frederik Stevenaert Employee of: Janssen, Vivianne Malmström Grant/research support from: VM has had research grants from Janssen Pharmaceutica
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Adams HC, Stevenaert F, Krejcik J, Van der Borght K, Smets T, Bald J, Abraham Y, Ceulemans H, Chiu C, Vanhoof G, Usmani SZ, Plesner T, Lonial S, Nijhof I, Lokhorst HM, Mutis T, van de Donk NWCJ, Sasser AK, Casneuf T. High-Parameter Mass Cytometry Evaluation of Relapsed/Refractory Multiple Myeloma Patients Treated with Daratumumab Demonstrates Immune Modulation as a Novel Mechanism of Action. Cytometry A 2018; 95:279-289. [PMID: 30536810 PMCID: PMC6590645 DOI: 10.1002/cyto.a.23693] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 11/09/2018] [Accepted: 11/13/2018] [Indexed: 12/15/2022]
Abstract
Daratumumab is a CD38‐targeted human monoclonal antibody with direct anti‐myeloma cell mechanisms of action. Flow cytometry in relapsed and/or refractory multiple myeloma (RRMM) patients treated with daratumumab revealed cytotoxic T‐cell expansion and reduction of immune‐suppressive populations, suggesting immune modulation as an additional mechanism of action. Here, we performed an in‐depth analysis of the effects of daratumumab on immune‐cell subpopulations using high‐dimensional mass cytometry. Whole‐blood and bone‐marrow baseline and on‐treatment samples from RRMM patients who participated in daratumumab monotherapy studies (SIRIUS and GEN501) were evaluated with high‐throughput immunophenotyping. In daratumumab‐treated patients, the intensity of CD38 marker expression decreased on many immune cells in SIRIUS whole‐blood samples. Natural killer (NK) cells were depleted with daratumumab, with remaining NK cells showing increased CD69 and CD127, decreased CD45RA, and trends for increased CD25, CD27, and CD137 and decreased granzyme B. Immune‐suppressive population depletion paralleled previous findings, and a newly observed reduction in CD38+ basophils was seen in patients who received monotherapy. After 2 months of daratumumab, the T‐cell population in whole‐blood samples from responders shifted to a CD8 prevalence with higher granzyme B positivity (P = 0.017), suggesting increased killing capacity and supporting monotherapy‐induced CD8+ T‐cell activation. High‐throughput cytometry immune profiling confirms and builds upon previous flow cytometry data, including comparable CD38 marker intensity on plasma cells, NK cells, monocytes, and B/T cells. Interestingly, a shift toward cytolytic granzyme B+ T cells was also observed and supports adaptive responses in patients that may contribute to depth of response. © 2018 The Authors. Cytometry Part A published by Wiley Periodicals, Inc. on behalf of International Society for Advancement of Cytometry.
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Affiliation(s)
- Homer C Adams
- Janssen Research & Development, LLC, Spring House, Pennsylvania
| | | | - Jakub Krejcik
- Department of Hematology, VU University Medical Center, Amsterdam, The Netherlands.,Department of Hematology, Vejle Hospital and University of Southern Denmark, Vejle, Denmark
| | | | - Tina Smets
- Janssen Research & Development, Beerse, Belgium
| | - Jaime Bald
- Janssen Research & Development, LLC, Spring House, Pennsylvania
| | | | | | | | | | - Saad Z Usmani
- Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute/Atrium Health, Charlotte, North Carolina
| | - Torben Plesner
- Department of Hematology, Vejle Hospital and University of Southern Denmark, Vejle, Denmark
| | - Sagar Lonial
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Inger Nijhof
- Department of Hematology, VU University Medical Center, Amsterdam, The Netherlands
| | - Henk M Lokhorst
- Department of Hematology, VU University Medical Center, Amsterdam, The Netherlands
| | - Tuna Mutis
- Department of Hematology, VU University Medical Center, Amsterdam, The Netherlands
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Smets T, Stevenaert F, Adams HC, Vanhoof G. Deep Profiling of the Immune System of Multiple Myeloma Patients Using Cytometry by Time-of-Flight (CyTOF). Methods Mol Biol 2018; 1792:47-54. [PMID: 29797251 DOI: 10.1007/978-1-4939-7865-6_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mass cytometry has emerged as a new state-of-the-art technology that enables in-depth characterization of cellular populations and functions at a single cell resolution. We describe the application of this technology to deeply phenotype the blood and bone marrow components of multiple myeloma patients in a clinical setting. This technology allows for simultaneous quantification of more than 40 markers, overcoming the challenges of traditional fluorescence-based flow cytometry.
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Affiliation(s)
- Tina Smets
- Janssen Research and Development, Beerse, Belgium
| | | | - H C Adams
- Janssen Research and Development, LLC, Spring House, PA, USA
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9
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Guo JL, Buist A, Soares A, Callaerts K, Calafate S, Stevenaert F, Daniels JP, Zoll BE, Crowe A, Brunden KR, Moechars D, Lee VMY. The Dynamics and Turnover of Tau Aggregates in Cultured Cells: INSIGHTS INTO THERAPIES FOR TAUOPATHIES. J Biol Chem 2016; 291:13175-93. [PMID: 27129267 DOI: 10.1074/jbc.m115.712083] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Indexed: 11/06/2022] Open
Abstract
Filamentous tau aggregates, the hallmark lesions of Alzheimer disease (AD), play key roles in neurodegeneration. Activation of protein degradation systems has been proposed to be a potential strategy for removing pathological tau, but it remains unclear how effectively tau aggregates can be degraded by these systems. By applying our previously established cellular model system of AD-like tau aggregate induction using preformed tau fibrils, we demonstrate that tau aggregates induced in cells with regulated expression of full-length mutant tau can be gradually cleared when soluble tau expression is suppressed. This clearance is at least partially mediated by the autophagy-lysosome pathway, although both the ubiquitin-proteasome system and the autophagy-lysosome pathway are deficient in handling large tau aggregates. Importantly, residual tau aggregates left after the clearance phase leads to a rapid reinstatement of robust tau pathology once soluble tau expression is turned on again. Moreover, we succeeded in generating monoclonal cells persistently carrying tau aggregates without obvious cytotoxicity. Live imaging of GFP-tagged tau aggregates showed that tau inclusions are dynamic structures constantly undergoing "fission" and "fusion," which facilitate stable propagation of tau pathology in dividing cells. These findings provide a greater understanding of cell-to-cell transmission of tau aggregates in dividing cells and possibly neurons.
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Affiliation(s)
- Jing L Guo
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
| | - Arjan Buist
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Alberto Soares
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Kathleen Callaerts
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Sara Calafate
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Frederik Stevenaert
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Joshua P Daniels
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
| | - Bryan E Zoll
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
| | - Alex Crowe
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
| | - Kurt R Brunden
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
| | - Diederik Moechars
- the Neuroscience Department, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, 2340 Beerse, Belgium
| | - Virginia M Y Lee
- From the Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 and
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10
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Tessmer MS, Fugere C, Stevenaert F, Naidenko OV, Chong HJ, Leclercq G, Brossay L. KLRG1 binds cadherins and preferentially associates with SHIP-1. Int Immunol 2007; 19:391-400. [PMID: 17307799 DOI: 10.1093/intimm/dxm004] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The killer cell lectin-like receptor G1 (KLRG1) is a unique inhibitory receptor expressed on a phenotypically mature subset of resting NK cells as well as subsets of T cells in naive mice. In vivo, pathogenic immune system activation induces dramatic changes in the expression patterns of KLRG1 among the different cell subsets. In order to enhance our understanding of KLRG1 signaling properties and to clarify the functions of KLRG1 on these cells, we identified the broadly expressed N-cadherin molecule as a ligand for KLRG1. We further demonstrate that a second member of this superfamily of adhesion molecules, E-cadherin, binds to KLRG1. Additionally, we show that upon phosphorylation of the immunoreceptor tyrosine-based inhibitory motif (ITIM) tyrosine, KLRG1 recruits both SHIP-1 and SHP-2 but not SHP-1. We also delineate the key KLRG1 ITIM amino acid residues required for optimal association with these phosphatases. Finally, we demonstrate that KLRG1 engagement can inhibit sub-optimal TCR signaling. Taken together, our results indicate that KLRG1 may differentially regulate NK cell and T cell functions through the association with different ligands as well as the recruitment of distinct phosphatases.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Binding Sites/genetics
- Cadherins/metabolism
- Cell Line
- Flow Cytometry
- Humans
- Immunoprecipitation
- Inositol Polyphosphate 5-Phosphatases
- Interleukin-2/metabolism
- Intracellular Signaling Peptides and Proteins/metabolism
- Jurkat Cells
- Lectins, C-Type
- Ligands
- Lymphocyte Activation/drug effects
- Lymphocyte Activation/immunology
- Membrane Proteins/metabolism
- Mice
- Mutation
- NIH 3T3 Cells
- Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases
- Phosphoric Monoester Hydrolases/metabolism
- Protein Tyrosine Phosphatase, Non-Receptor Type 11
- Protein Tyrosine Phosphatase, Non-Receptor Type 6/metabolism
- Protein Tyrosine Phosphatases/metabolism
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- Receptors, Immunologic/genetics
- Receptors, Immunologic/metabolism
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Transfection
- Trypsin/metabolism
- beta-Galactosidase/genetics
- beta-Galactosidase/metabolism
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Affiliation(s)
- Marlowe S Tessmer
- Department of Molecular Microbiology and Immunology and Graduate Program in Pathobiology, Division of Biology and Medicine, Box G-B618, Brown University, Providence, RI 02912, USA
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11
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Stevenaert F, Van Beneden K, De Colvenaer V, Franki AS, Debacker V, Boterberg T, Deforce D, Pfeffer K, Plum J, Elewaut D, Leclercq G. Ly49 and CD94/NKG2 receptor acquisition by NK cells does not require lymphotoxin-β receptor expression. Blood 2005; 106:956-62. [PMID: 15827137 DOI: 10.1182/blood-2004-10-4159] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
AbstractA crucial step in murine natural killer (NK) cell development, mediated by bone marrow stromal cells, is the induction of Ly49 and CD94/NKG2 receptor expression. The signals that regulate Ly49 receptor expression are still largely undetermined. It has been shown that interaction between lymphotoxin α1β2 (LTα1β2) and LTβ receptor (LTβR), expressed on lymphoid progenitor cells and nonlymphoid bone marrow stromal cells, respectively, is important for both quantitative and functional NK cell development. Therefore, we have investigated the role of LT-LTβR–mediated signaling in Ly49 and CD94/NKG2 receptor acquisition. We show that the NK receptor repertoire of LTβR–/– mice can only be partially analyzed because of the residual 129/Ola mouse genetic background, due to a physical linkage of the LTβR locus and the loci encoding the Ly49 and CD94/NKG2 receptors. Therefore, we transferred wild-type B6 lymphoid-committed progenitor cells into LTβR–/– mice, which differentiated into NK cells with a normal NK cell receptor repertoire. Also, administration of LTβR-immunoglobulin (Ig), which acts as a soluble receptor for LTα1β2, resulted in reduced NK cell percentages but did not influence the Ly49 and CD94/NKG2 receptor acquisition on remaining NK cells. These results indicate that LTβR-mediated signals are not required for Ly49 and CD94/NKG2 receptor acquisition.
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MESH Headings
- Animals
- Antigens, CD
- Antigens, Ly/analysis
- Antigens, Ly/genetics
- Bone Marrow Cells
- Cell Differentiation
- Gene Expression
- Hematopoietic Stem Cells/physiology
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/metabolism
- Lectins, C-Type
- Lymphotoxin beta Receptor
- Mice
- Mice, Inbred Strains
- Mice, Knockout
- NK Cell Lectin-Like Receptor Subfamily D
- Receptors, Immunologic/analysis
- Receptors, Immunologic/genetics
- Receptors, NK Cell Lectin-Like
- Receptors, Natural Killer Cell
- Receptors, Tumor Necrosis Factor/physiology
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Affiliation(s)
- Frederik Stevenaert
- Department of Clinical Chemistry, Microbiology and Immunology, University of Ghent, University Hospital, Blok A, 4th Floor, De Pintelaan 185, B-9000 Ghent, Belgium
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12
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Stevenaert F, Van Beneden K, De Creus A, Debacker V, Plum J, Leclercq G. Ly49E expression points toward overlapping, but distinct, natural killer (NK) cell differentiation kinetics and potential of fetal versus adult lymphoid progenitors. J Leukoc Biol 2003; 73:731-8. [PMID: 12773505 DOI: 10.1189/jlb.0902443] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Using a new antibody, we found previously that contrary to adult natural killer (NK) cells, fetal NK cells have a unique phenotype, as they exclusively express Ly49E. This can be explained by an intrinsic different NK differentiation potential of fetal versus adult lymphoid progenitors, by immaturity of fetal NK cells or by instability of Ly49E expression. Here, we show that adult progenitor cells were still capable of differentiating into Ly49E-expressing NK cells but at a much lower frequency. Surprisingly, Ly49E expression in vitro did not require stromal cells. Kinetic analysis in vivo showed that Ly49E was expressed early, together with CD94/NKG2 and Ly49G2, followed by Ly49C, and finally Ly49D. Transfer of sorted Ly49E-positive fetal NK cells showed stable Ly49E expression, and later, part of these cells up-regulated other Ly49 members. These data indicate that although there are intrinsic differences, there is no strict fetal and adult wave of NK cell differentiation.
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MESH Headings
- Age Factors
- Animals
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Antigens, Ly/genetics
- Antigens, Ly/metabolism
- Cell Differentiation
- Cell Division
- Cells, Cultured
- DNA-Binding Proteins/genetics
- Fetus/cytology
- Fetus/immunology
- Hematopoietic Stem Cells/immunology
- Killer Cells, Natural/classification
- Killer Cells, Natural/cytology
- Killer Cells, Natural/immunology
- Kinetics
- Lectins, C-Type/genetics
- Lectins, C-Type/metabolism
- Liver/cytology
- Liver/embryology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- NK Cell Lectin-Like Receptor Subfamily A
- NK Cell Lectin-Like Receptor Subfamily D
- Receptors, Immunologic/genetics
- Receptors, Immunologic/metabolism
- Receptors, NK Cell Lectin-Like
- Receptors, Natural Killer Cell
- Stem Cells/immunology
- Transcription, Genetic
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Affiliation(s)
- Frederik Stevenaert
- Department of Clinical Chemistry, Microbiology and Immunology, University of Ghent, University Hospital, Belgium
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13
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De Creus A, Van Beneden K, Stevenaert F, Debacker V, Plum J, Leclercq G. Developmental and functional defects of thymic and epidermal V gamma 3 cells in IL-15-deficient and IFN regulatory factor-1-deficient mice. J Immunol 2002; 168:6486-93. [PMID: 12055269 DOI: 10.4049/jimmunol.168.12.6486] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study, the role of IL-15 and its regulation by the transcription factor IFN regulatory factor-1 (IRF-1) in murine V gamma 3 T cell development and activity is assessed. Compared with wild-type (WT) mice, reduced numbers of mature V gamma 3 cells were found in the fetal thymus of IL-15(-/-) mice, while IRF-1(-/-) mice displayed normal frequencies. V gamma 3(+) dendritic epidermal T cells (DETCs) were absent in IL-15(-/-) mice but present in IRF-1(-/-) mice. DETCs from IRF-1(-/-) mice displayed morphologically a less mature phenotype and showed different emergence kinetics during ontogeny. This corresponded with lower IL-15 mRNA levels in the skin epidermis. Comparable levels of IL-7 were found in the skin of WT and IL-15(-/-) mice. Adoptive transfer experiments of WT fetal thymocytes into IL-15(-/-) mice did not result in the development of V gamma 3(+) DETCs, confirming the nonredundant role of IL-15 in the skin during DETC development. In vitro, cytolytic activity of IL-15(-/-) V gamma 3 cells was normal after stimulation with IL-15 and was further enhanced by addition of IL-12. In contrast, cytolytic activity of IRF-1(-/-) V gamma 3 cells remained defective after stimulation with IL-15 in combination with IL-12. These data suggest that IL-15 is redundant for the development and/or survival of mature V gamma 3 cells in the fetal thymus, whereas it is essential for the localization of V gamma 3 cells in the skin. Furthermore, a possible role for IRF-1 in inducing morphological maturation of DETCs and cytolytic capacity of V gamma 3 cells is suggested.
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MESH Headings
- Adoptive Transfer
- Animals
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Cells, Cultured
- Culture Techniques
- Cytotoxicity Tests, Immunologic
- DNA-Binding Proteins/deficiency
- DNA-Binding Proteins/genetics
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Epidermal Cells
- Epidermis/immunology
- Fetus
- Interferon Regulatory Factor-1
- Interleukin-12/pharmacology
- Interleukin-15/biosynthesis
- Interleukin-15/deficiency
- Interleukin-15/genetics
- Interleukin-15/pharmacology
- Leukocyte Count
- Leukopenia/genetics
- Leukopenia/immunology
- Leukopenia/pathology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Phosphoproteins/deficiency
- Phosphoproteins/genetics
- RNA, Messenger/biosynthesis
- Receptors, Antigen, T-Cell, gamma-delta/biosynthesis
- Skin/immunology
- Skin/metabolism
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- T-Lymphocyte Subsets/transplantation
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Thymus Gland/cytology
- Thymus Gland/embryology
- Thymus Gland/immunology
- Thymus Gland/transplantation
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Affiliation(s)
- An De Creus
- Department of Clinical Chemistry, Microbiology, and Immunology, University of Ghent, University Hospital, Ghent, Belgium
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14
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Van Beneden K, De Creus A, Stevenaert F, Debacker V, Plum J, Leclercq G. Expression of inhibitory receptors Ly49E and CD94/NKG2 on fetal thymic and adult epidermal TCR V gamma 3 lymphocytes. J Immunol 2002; 168:3295-302. [PMID: 11907085 DOI: 10.4049/jimmunol.168.7.3295] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Ly49 and CD94/NKG2 inhibitory receptors are predominantly expressed on murine NK cells, but they are also expressed on a subpopulation of peripheral CD8 memory TCR alphabeta lymphocytes. In this study we demonstrate that Ly49E and CD94/NKG2 receptors are expressed on mature TCR Vgamma3(+) cells in the fetal thymus. Expression correlated with a memory phenotype, such as expression of CD44, 2B4, and IL-2Rbeta (CD122), and absence of IL-2Ralpha (CD25) expression. No expression of Ly49A, C, D, G2, or I receptors was observed. This phenotype is similar to that of fetal thymic NK cells. Skin-located Vgamma3 T cells, the progeny of fetal thymic Vgamma3 cells, also expressed CD94/NKG2 and Ly49E but not the other members of the Ly49 family. The development and survival of Ly49E(+) or CD94/NKG2(+) Vgamma3 T lymphocytes was not dependent upon expression of MHC class I molecules. The cytotoxicity of TCR Vgamma3 cells was inhibited when Qdm, the ligand for CD94/NKG2, was presented by Qa1(b)-transfected target cells. Also, upon cross-linking of CD94/NKG2 with mAb 3S9, TCR Vgamma3 thymocytes were prevented from killing FcgammaR(+) P815 target cells. These effects were most pronounced in the CD94/NKG2(high) subpopulation as compared with the CD94/NKG2(low) subpopulation of Vgamma3 cells. Our data demonstrate that Vgamma3 T cells expressing inhibitory Ly49E and CD94/NKG2 receptors are mature and display a memory phenotype, and that CD94/NKG2 functions as an inhibitory receptor on these T lymphocytes.
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MESH Headings
- Aging/immunology
- Animals
- Antigens, CD/biosynthesis
- Antigens, Ly/biosynthesis
- Cell Differentiation/immunology
- Cells, Cultured
- Cytotoxicity Tests, Immunologic
- Down-Regulation/immunology
- Epidermal Cells
- Epidermis/immunology
- Epidermis/metabolism
- Fetus
- Histocompatibility Antigens Class I/genetics
- Histocompatibility Antigens Class I/physiology
- Immunologic Memory
- Immunophenotyping
- Killer Cells, Natural/metabolism
- Lectins, C-Type
- Membrane Glycoproteins/biosynthesis
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- NK Cell Lectin-Like Receptor Subfamily A
- NK Cell Lectin-Like Receptor Subfamily D
- Receptors, Antigen, T-Cell, gamma-delta/biosynthesis
- Receptors, Immunologic/biosynthesis
- Receptors, NK Cell Lectin-Like
- Receptors, Natural Killer Cell
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- Thymus Gland/cytology
- Thymus Gland/embryology
- Thymus Gland/immunology
- Thymus Gland/metabolism
- Tumor Cells, Cultured
- beta 2-Microglobulin/deficiency
- beta 2-Microglobulin/genetics
- beta 2-Microglobulin/physiology
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Affiliation(s)
- Katrien Van Beneden
- Department of Clinical Chemistry, Microbiology, and Immunology, University of Ghent, University Hospital, Ghent, Belgium
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15
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Van Beneden K, Stevenaert F, De Creus A, Debacker V, De Boever J, Plum J, Leclercq G. Expression of Ly49E and CD94/NKG2 on fetal and adult NK cells. J Immunol 2001; 166:4302-11. [PMID: 11254682 DOI: 10.4049/jimmunol.166.7.4302] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Murine NK cells express inhibitory receptors belonging to the Ly49 and CD94/NKG2 family. Ly49E and CD94 are the only NK cell receptor transcripts detectable in fetal NK cells. Still unproved is the surface expression of Ly49E on NK cells. Here we generated two novel mAbs, a mAb recognizing Ly49E with cross-reactivity to Ly49C, and a mAb against NKG2A/C/E. Ly49E was immunoprecipitated as a disulfide-linked homodimer with 46-kDa subunits. Removal of N-linked carbohydrates revealed a 31-kDa protein backbone. NKG2A was immunoprecipitated as a 38-kDa protein. Although the frequency of fetal NK cells expressing Ly49E was higher than 25%, it decreased drastically from 2 wk after birth. Phenotypic analysis showed that approximately 90% of fetal NK cells and approximately 50% of adult NK cells express high levels of CD94/NKG2. The remaining 50% of adult NK cells expressed low surface levels of CD94/NKG2. Expression of Ly49E and CD94/NKG2 was not restricted to NK cells, but was also observed on NK T and memory T cells. Functional analysis showed that sorted Ly49E(+) and CD94/NKG2(+) fetal NK cells could discriminate between MHC class I-positive and MHC class I-negative tumor cells. We also demonstrated that Ly49E becomes phosphorylated following pervanadate stimulation of fetal NK cells. The expression levels of Ly49E and CD94/NKG2 were similar in wild-type compared with beta(2)-microglobulin(-/-) mice. In conclusion, generation of mAbs against Ly49E and NKG2 extended the phenotypic and functional characterization of NK cells.
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MESH Headings
- Aging/immunology
- Animals
- Antibodies, Monoclonal/biosynthesis
- Antibodies, Monoclonal/metabolism
- Antigens, CD/biosynthesis
- Antigens, Ly
- Cell Differentiation/immunology
- Cytotoxicity Tests, Immunologic
- Fetus/immunology
- Fetus/metabolism
- Immunologic Memory
- Killer Cells, Natural/cytology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Lectins, C-Type
- Membrane Glycoproteins/biosynthesis
- Membrane Glycoproteins/chemistry
- Membrane Glycoproteins/immunology
- Membrane Glycoproteins/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Mutant Strains
- NK Cell Lectin-Like Receptor Subfamily A
- NK Cell Lectin-Like Receptor Subfamily C
- NK Cell Lectin-Like Receptor Subfamily D
- Phosphorylation
- Rats
- Rats, Inbred F344
- Receptors, Immunologic/biosynthesis
- Receptors, Immunologic/chemistry
- Receptors, Immunologic/immunology
- Receptors, Immunologic/physiology
- Receptors, KIR
- Receptors, NK Cell Lectin-Like
- Receptors, Natural Killer Cell
- Spleen/cytology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- Thymus Gland/cytology
- Tumor Cells, Cultured
- Tyrosine/metabolism
- beta 2-Microglobulin/deficiency
- beta 2-Microglobulin/genetics
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Affiliation(s)
- K Van Beneden
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, University Hospital, Ghent, Belgium
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