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Valbon SF, Lebel ME, Feldman HA, Condotta SA, Dong M, Giordano D, Waggoner SN, Melichar HJ, Richer MJ. Type I interferon induced during chronic viral infection favors B-cell development in the thymus. Immunol Cell Biol 2024. [PMID: 39009814 DOI: 10.1111/imcb.12808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 06/27/2024] [Accepted: 06/27/2024] [Indexed: 07/17/2024]
Abstract
Chronic viral infections cause thymic involution yet the potential for broader, longer-term impact on thymic composition remains unexplored. Here we show that chronic, but not acute, lymphocytic choriomeningitis virus infection promotes a unique population of immature B cells in the thymus. We show that chronic viral infection promotes signals within the thymus, including the expression of B-cell activating factor (BAFF), that favor the maturation of this population as these cells acquire expression of CD19 and immunoglobulin M. Mechanistically, type I interferon (IFN-I), predominantly IFNβ, signals to thymic hematopoietic cells, strongly delaying T-cell development at the earliest precursor stage. Furthermore, IFN-I signaling to the nonhematopoietic compartment provides a second signal essential to favor B-cell differentiation and maturation within the thymus. Importantly, chronic infection yields changes in the B-cell population for at least 50 days following infection, long after thymic atrophy has subsided. Thus, the inflammatory milieu induced by chronic viral infection has a profound, and long-lasting, effect on thymic composition leading to the generation of a novel population of thymic B cells.
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Affiliation(s)
- Stefanie F Valbon
- Department of Microbiology & Immunology, McGill University, Montreal, QC, Canada
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Department of Microbiology, Immunology and Infectious Disease, University of Montreal, Montreal, QC, Canada
| | - Marie-Eve Lebel
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - H Alex Feldman
- Center for Autoimmune Genomics & Etiology, Division of Human Genetics, Cincinnati Children's Hospital, Cincinnati, OH, USA
- Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Stephanie A Condotta
- Department of Microbiology & Immunology, McGill University, Montreal, QC, Canada
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
- Cooperative Center for Excellence in Hematology, Indiana University School of Medicine, Indianapolis, IN, USA
- Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Mengqi Dong
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Daniela Giordano
- Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Stephen N Waggoner
- Center for Autoimmune Genomics & Etiology, Division of Human Genetics, Cincinnati Children's Hospital, Cincinnati, OH, USA
- Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Heather J Melichar
- Department of Microbiology & Immunology, McGill University, Montreal, QC, Canada
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Martin J Richer
- Department of Microbiology & Immunology, McGill University, Montreal, QC, Canada
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
- Cooperative Center for Excellence in Hematology, Indiana University School of Medicine, Indianapolis, IN, USA
- Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, USA
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2
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Bjørgen H, Barac F, Fjelldal PG, Hansen T, Hordvik I, Koppang EO. Organisation of the Atlantic salmon (Salmo salar) thymus and its content of Ig-expressing cells. FISH & SHELLFISH IMMUNOLOGY 2024; 150:109652. [PMID: 38788913 DOI: 10.1016/j.fsi.2024.109652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 05/21/2024] [Accepted: 05/22/2024] [Indexed: 05/26/2024]
Abstract
The thymus of fishes is located as a dual organ in a rostrodorsal projection within the gill chamber and is covered by the operculum. The histological organization of the teleost fish thymus displays considerable diversity, particularly in salmonids where a clear distinction between the thymus cortex and medulla is yet to be defined. Recent interest has focused on the role of B cells in thymic function, but the presence of these cells within the salmon thymus remains poorly understood. In this morphological study, we applied in situ hybridization to investigate developing Atlantic salmon thymi for the expression of recombination activating (Rag) genes 1 and 2. We identified the location of the cortex, aligning with the previously described inner zone. Expression of IgM and IgD transcripts was predominantly observed in cells within the outer and subcapsular zones, with lesser expression in the cortex and inner zone. IgT expression was confined to a limited number of cells in the inner zone and capsule. The location of the thymus medulla could not be established. Our results are discussed in the context of the recently identified lymphoid organs, namely the intrabranchial lymphoid tissue (ILT) and the salmon bursa.
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Affiliation(s)
- Håvard Bjørgen
- Unit of Anatomy, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Fran Barac
- Unit of Anatomy, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Per G Fjelldal
- Matre Research Station, Institute of Marine Research, Matre, Norway
| | - Tom Hansen
- Matre Research Station, Institute of Marine Research, Matre, Norway
| | - Ivar Hordvik
- Institute of Biology, University of Bergen, Bergen, Norway
| | - Erling O Koppang
- Unit of Anatomy, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway.
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3
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Miccoli A, Pianese V, Bidoli C, Fausto AM, Scapigliati G, Picchietti S. Transcriptome profiling of microdissected cortex and medulla unravels functional regionalization in the European sea bass Dicentrarchus labrax thymus. FISH & SHELLFISH IMMUNOLOGY 2024; 145:109319. [PMID: 38145782 DOI: 10.1016/j.fsi.2023.109319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023]
Abstract
The thymus is a sophisticated primary lymphoid organ in jawed vertebrates, but knowledge on teleost thymus remains scarce. In this study, for the first time in the European sea bass, laser capture microdissection was leveraged to collect two thymic regions based on histological features, namely the cortex and the medulla. The two regions were then processed by RNAseq and in-depth functional transcriptome analyses with the aim of revealing differential gene expression patterns and gene sets enrichments, ultimately unraveling unique microenvironments imperative for the development of functional T cells. The sea bass cortex emerged as a hub of T cell commitment, somatic recombination, chromatin remodeling, cell cycle regulation, and presentation of self antigens from autophagy-, proteasome- or proteases-processed proteins. The cortex therefore accommodated extensive thymocyte proliferation and differentiation up to the checkpoint of positive selection. The medulla instead appeared as the center stage in autoimmune regulation by negative selection and deletion of autoreactive T cells, central tolerance mechanisms and extracellular matrix organization. Region-specific canonical markers of T and non-T lineage cells as well as signals for migration to/from, and trafficking within, the thymus were identified, shedding light on the highly coordinated and exquisitely complex bi-directional interactions among thymocytes and stromal components. Markers ascribable to thymic nurse cells and poorly characterized post-aire mTEC populations were found in the cortex and medulla, respectively. An in-depth data mining also exposed previously un-annotated genomic resources with differential signatures. Overall, our findings contribute to a broader understanding of the relationship between regional organization and function in the European sea bass thymus, and provide essential insights into the molecular mechanisms underlying T-cell mediated adaptive immune responses in teleosts.
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Affiliation(s)
- A Miccoli
- National Research Council, Institute for Marine Biological Resources and Biotechnology (IRBIM), 60125, Ancona, Italy
| | - V Pianese
- Dept. for Innovation in Biological, Agro-food and Forest Systems (DIBAF), University of Tuscia, Largo Dell'Università Snc, 01100, Viterbo, Italy
| | - C Bidoli
- Dept. of Life Sciences, University of Trieste, 34127, Trieste, Italy
| | - A M Fausto
- Dept. for Innovation in Biological, Agro-food and Forest Systems (DIBAF), University of Tuscia, Largo Dell'Università Snc, 01100, Viterbo, Italy
| | - G Scapigliati
- Dept. for Innovation in Biological, Agro-food and Forest Systems (DIBAF), University of Tuscia, Largo Dell'Università Snc, 01100, Viterbo, Italy
| | - S Picchietti
- Dept. for Innovation in Biological, Agro-food and Forest Systems (DIBAF), University of Tuscia, Largo Dell'Università Snc, 01100, Viterbo, Italy.
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4
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Reading the Ts and DCs of thymopoiesis. Nat Immunol 2023; 24:385-386. [PMID: 36829070 DOI: 10.1038/s41590-023-01439-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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5
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McGuire CC, Robert JR. Environmental endocrine disruptors and amphibian immunity: A bridge between the thyroid hormone axis and T cell development. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 140:104617. [PMID: 36529309 PMCID: PMC9892850 DOI: 10.1016/j.dci.2022.104617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 12/11/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Immunity is susceptible to reprogramming by environmental chemical and endocrine signals. Notably, numerous thyroid disrupting chemicals (TDCs) have the potential to perturb immune endpoints, but data are lacking on the mechanisms by which TDCs can influence the development of the immune system. T cell immunity is particularly vulnerable to modulation by TDCs during thymic education, differentiation, and selection. The following review discusses the ways in which thyroid hormones may influence T cell development, as well as emerging TDCs with potential to impact both thyroid hormone physiology and immune outcomes. To overcome the challenges of studying TDC impacts on immune toxicological endpoints, a comparative approach using the amphibian Xenopus laevis is recommended. X. laevis are ideally suited to studying TDC impacts on immunity due to the importance of thyroid hormones for metamorphosis, and the wealth of immunological models to measure immune endpoints in both tadpoles and adult frogs.
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Affiliation(s)
- Connor C McGuire
- University of Rochester Department of Microbiology and Immunology, USA; University of Rochester Department Environmental Medicine, USA
| | - Jacques R Robert
- University of Rochester Department of Microbiology and Immunology, USA; University of Rochester Department Environmental Medicine, USA.
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6
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Mustillo PJ, Sullivan KE, Chinn IK, Notarangelo LD, Haddad E, Davies EG, de la Morena MT, Hartog N, Yu JE, Hernandez-Trujillo VP, Ip W, Franco J, Gambineri E, Hickey SE, Varga E, Markert ML. Clinical Practice Guidelines for the Immunological Management of Chromosome 22q11.2 Deletion Syndrome and Other Defects in Thymic Development. J Clin Immunol 2023; 43:247-270. [PMID: 36648576 PMCID: PMC9892161 DOI: 10.1007/s10875-022-01418-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/04/2022] [Indexed: 01/18/2023]
Abstract
Current practices vary widely regarding the immunological work-up and management of patients affected with defects in thymic development (DTD), which include chromosome 22q11.2 microdeletion syndrome (22q11.2del) and other causes of DiGeorge syndrome (DGS) and coloboma, heart defect, atresia choanae, retardation of growth and development, genital hypoplasia, ear anomalies/deafness (CHARGE) syndrome. Practice variations affect the initial and subsequent assessment of immune function, the terminology used to describe the condition and immune status, the accepted criteria for recommending live vaccines, and how often follow-up is needed based on the degree of immune compromise. The lack of consensus and widely varying practices highlight the need to establish updated immunological clinical practice guidelines. These guideline recommendations provide a comprehensive review for immunologists and other clinicians who manage immune aspects of this group of disorders.
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Affiliation(s)
- Peter J Mustillo
- Division of Allergy and Immunology, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, 43205, USA.
| | - Kathleen E Sullivan
- Division of Allergy Immunology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - Ivan K Chinn
- Division of Immunology, Allergy, and Retrovirology, Department of Pediatrics, Texas Children's Hospital, Houston, TX, 77030, USA
| | - Luigi D Notarangelo
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Elie Haddad
- Department of Pediatrics, Department of Microbiology, Infectious Diseases and Immunology, CHU Sainte-Justine, University of Montreal, Montreal, QC, H3T 1C5, Canada
| | - E Graham Davies
- Department of Immunology, Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health, London, WC1N 3HJ, UK
| | - Maria Teresa de la Morena
- Division of Immunology, Department of Pediatrics, Seattle Children's Hospital, University of Washington, Seattle, WA, 98105, USA
| | - Nicholas Hartog
- Spectrum Health Helen DeVos Children's Hospital Department of Allergy and Immunology, Michigan State University College of Human Medicine, East Lansing, USA
| | - Joyce E Yu
- Division of Allergy, Immunology & Rheumatology, Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | | | - Winnie Ip
- Department of Immunology, Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health, London, WC1N 3JH, UK
| | - Jose Franco
- Grupo de Inmunodeficiencias Primarias, Facultad de Medicina, Universidad de Antioquia UdeA, Medellin, Colombia
| | - Eleonora Gambineri
- Department of "NEUROFARBA", Section of Child's Health, University of Florence, Florence, Italy
- Centre of Excellence, Division of Pediatric Oncology/Hematology, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Scott E Hickey
- Division of Genetic & Genomic Medicine, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Elizabeth Varga
- Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - M Louise Markert
- Department of Immunology, Duke University Medical Center, Durham, NC, 27710, USA
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7
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Hebbandi Nanjundappa R, Sokke Umeshappa C, Geuking MB. The impact of the gut microbiota on T cell ontogeny in the thymus. Cell Mol Life Sci 2022; 79:221. [PMID: 35377005 PMCID: PMC11072498 DOI: 10.1007/s00018-022-04252-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/10/2022] [Accepted: 03/16/2022] [Indexed: 12/12/2022]
Abstract
The intestinal microbiota is critical for the development of gut-associated lymphoid tissues, including Peyer's patches and mesenteric lymph nodes, and is instrumental in educating the local as well as systemic immune system. In addition, it also impacts the development and function of peripheral organs, such as liver, lung, and the brain, in health and disease. However, whether and how the intestinal microbiota has an impact on T cell ontogeny in the hymus remains largely unclear. Recently, the impact of molecules and metabolites derived from the intestinal microbiota on T cell ontogeny in the thymus has been investigated in more detail. In this review, we will discuss the recent findings in the emerging field of the gut-thymus axis and we will highlight the current questions and challenges in the field.
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Affiliation(s)
- Roopa Hebbandi Nanjundappa
- Department of Microbiology, Immunology, and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
- Department of Pediatrics, IWK Research Center, Halifax, NS, Canada
| | - Channakeshava Sokke Umeshappa
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
- Department of Pediatrics, IWK Research Center, Halifax, NS, Canada
| | - Markus B Geuking
- Department of Microbiology, Immunology, and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada.
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8
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Collins C, Sharpe E, Silber A, Kulke S, Hsieh EWY. Congenital Athymia: Genetic Etiologies, Clinical Manifestations, Diagnosis, and Treatment. J Clin Immunol 2021; 41:881-895. [PMID: 33987750 PMCID: PMC8249278 DOI: 10.1007/s10875-021-01059-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 05/03/2021] [Indexed: 12/17/2022]
Abstract
Congenital athymia is an ultra-rare disease characterized by the absence of a functioning thymus. It is associated with several genetic and syndromic disorders including FOXN1 deficiency, 22q11.2 deletion, CHARGE Syndrome (Coloboma, Heart defects, Atresia of the nasal choanae, Retardation of growth and development, Genitourinary anomalies, and Ear anomalies), and Complete DiGeorge Syndrome. Congenital athymia can result from defects in genes that impact thymic organ development such as FOXN1 and PAX1 or from genes that are involved in development of the entire midline region, such as TBX1 within the 22q11.2 region, CHD7, and FOXI3. Patients with congenital athymia have profound immunodeficiency, increased susceptibility to infections, and frequently, autologous graft-versus-host disease (GVHD). Athymic patients often present with absent T cells but normal numbers of B cells and Natural Killer cells (T-B+NK+), similar to a phenotype of severe combined immunodeficiency (SCID); these patients may require additional steps to confirm the diagnosis if no known genetic cause of athymia is identified. However, distinguishing athymia from SCID is crucial, as treatments differ for these conditions. Cultured thymus tissue is being investigated as a treatment for congenital athymia. Here, we review what is known about the epidemiology, underlying etiologies, clinical manifestations, and treatments for congenital athymia.
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Affiliation(s)
- Cathleen Collins
- Department of Pediatrics, Division of Allergy Immunology, Rady Children's Hospital, University of California San Diego, San Diego, CA, USA
| | | | | | - Sarah Kulke
- Enzyvant Therapeutics, Inc, Cambridge, MA, USA
| | - Elena W Y Hsieh
- Department of Pediatrics, Section of Allergy and Immunology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA.
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, USA.
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9
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Perez YE, Moran CA. The thymus: General concepts on embryology, anatomy, histology and immunohistochemistry. Semin Diagn Pathol 2021; 39:86-91. [PMID: 34147301 DOI: 10.1053/j.semdp.2021.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 06/07/2021] [Indexed: 11/11/2022]
Abstract
A fundamental aspect that is commonly overlook when assessing thymic tumors is the normal histology and immunohistochemical features of the normal thymus. Given the fact that most epithelial tumors occur in the adult population, it is only rarely that we are confronted with assessing normal immunohistochemistry of the thymus. However, we consider that such knowledge is of utmost importance is assessing pathological conditions including epithelial tumors or tumors of other lineages. Therefore, in this writing we have concentrated our efforts in providing an overview of the embryology and anatomy of the thymus as well as putting the normal histology and immunohistochemistry in perspective when assessing pathological conditions.
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Affiliation(s)
- Ydamis Estrella Perez
- Department of Pathology, the University of Texas, M D Anderson Cancer Center, Houston, TX, USA
| | - Cesar A Moran
- Department of Pathology, the University of Texas, M D Anderson Cancer Center, Houston, TX, USA.
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Guha I, Bhuniya A, Shukla D, Patidar A, Nandi P, Saha A, Dasgupta S, Ganguly N, Ghosh S, Nair A, Majumdar S, Saha B, Storkus WJ, Baral R, Bose A. Tumor Arrests DN2 to DN3 Pro T Cell Transition and Promotes Its Conversion to Thymic Dendritic Cells by Reciprocally Regulating Notch1 and Ikaros Signaling. Front Immunol 2020; 11:898. [PMID: 32582141 PMCID: PMC7292239 DOI: 10.3389/fimmu.2020.00898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 04/17/2020] [Indexed: 11/13/2022] Open
Abstract
Tumor progression in the host leads to severe impairment of intrathymic T-cell differentiation/maturation, leading to the paralysis of cellular anti-tumor immunity. Such suppression manifests the erosion of CD4+CD8+ double-positive (DP) immature thymocytes and a gradual increase in CD4-CD8- double negative (DN) early T-cell progenitors. The impact of such changes on the T-cell progenitor pool in the context of cancer remains poorly investigated. Here, we show that tumor progression blocks the transition of Lin-Thy1.2+CD25+CD44+c-KitlowDN2b to Lin-Thy1.2+CD25+CD44-c-Kit-DN3 in T-cell maturation, instead leading to DN2-T-cell differentiation into dendritic cells (DC). We observed that thymic IL-10 expression is upregulated, particularly at cortico-medullary junctions (CMJ), under conditions of progressive disease, resulting in the termination of IL-10Rhigh DN2-T-cell maturation due to dysregulated expression of Notch1 and its target, CCR7 (thus restricting these cells to the CMJ). Intrathymic differentiation of T-cell precursors in IL-10-/- mice and in vitro fetal thymic organ cultures revealed that IL-10 promotes the interaction between thymic stromal cells and Notch1low DN2-T cells, thus facilitating these DN2-T cells to differentiate toward CD45+CD11c+MHC-II+ thymic DCs as a consequence of activating the Ikaros/IRF8 signaling axis. We conclude that a novel function of thymically-expressed IL-10 in the tumor-bearing host diverts T-cell differentiation toward a DC pathway, thus limiting the protective adaptive immune repertoire.
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Affiliation(s)
- Ipsita Guha
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Avishek Bhuniya
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Divanshu Shukla
- Department of Pathogenesis and Cell Responses, National Centre for Cell Sciences, Pune, India
| | - Ashok Patidar
- Department of Pathogenesis and Cell Responses, National Centre for Cell Sciences, Pune, India
| | - Partha Nandi
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Akata Saha
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Shayani Dasgupta
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Nilanjan Ganguly
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Sweta Ghosh
- Department of Molecular Medicine, Bose Institute, Kolkata, India
| | - Arathi Nair
- Department of Pathogenesis and Cell Responses, National Centre for Cell Sciences, Pune, India
| | - Subrata Majumdar
- Department of Molecular Medicine, Bose Institute, Kolkata, India
| | - Bhaskar Saha
- Department of Pathogenesis and Cell Responses, National Centre for Cell Sciences, Pune, India
| | - Walter J Storkus
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Rathindranath Baral
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
| | - Anamika Bose
- Department of Immunoregulation and Immunodiagnostics, Chittaranjan National Cancer Institute (CNCI), Kolkata, India
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11
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A Rare Complication of Thymoma: Pure White Cell Aplasia in Good's Syndrome. Case Rep Hematol 2019; 2019:1024670. [PMID: 31737381 PMCID: PMC6815588 DOI: 10.1155/2019/1024670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/09/2019] [Indexed: 01/01/2023] Open
Abstract
Pure white cell aplasia (PWCA) is a rare manifestation of thymoma. It is characterized by agranulocytosis with absent myeloid precursors in the bone marrow and normal hematopoiesis for other cell lines. Here we describe a 65-year-old female patient who presented with three days of fever and night sweat. Chest CT revealed an anterior mediastinal mass. A biopsy of the mass confirmed a diagnosis of thymoma mixed type A and B2. The patient developed a severe neutropenia, and her bone marrow revealed significantly decreased neutrophil-lineage cells, rare to absent B cells, and defective T cells, consistent with PWCA. Following thymectomy, a complete resolution of PWCA was achieved via multimodality therapy of intravenous immunoglobulins, granulocyte colony-stimulating factor, and immunosuppressant. This report highlights the care complexity regarding treatment choices and decision to perform thymectomy in patients presenting with PWCA.
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12
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Oltra E, Caicedo A. Real Time In Vivo Tracking of Thymocytes in the Anterior Chamber of the Eye by Laser Scanning Microscopy. J Vis Exp 2018. [PMID: 30346412 DOI: 10.3791/58236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The purpose of the method being presented is to show, for the first time, the transplant of newborn thymi into the anterior eye chamber of isogenic adult mice for in vivo longitudinal real-time monitoring of thymocytes´ dynamics within a vascularized thymus segment. Following the transplantation, laser scanning microscopy (LSM) through the cornea allows in vivo noninvasive repeated imaging at cellular resolution level. Importantly, the approach adds to previous intravital T-cell maturation imaging models the possibility for continuous progenitor cell recruitment and mature T-cell egress recordings in the same animal. Additional advantages of the system are the transparency of the grafted area, permitting macroscopic rapid monitoring of the implanted tissue, and the accessibility to the implant allowing for localized in addition to systemic treatments. The main limitation being the volume of the tissue that fits in the reduced space of the eye chamber which demands for lobe trimming. Organ integrity is maximized by dissecting thymus lobes in patterns previously shown to be functional for mature T-cell production. The technique is potentially suited to interrogate a milieu of medically relevant questions related to thymus function that include autoimmunity, immunodeficiency and central tolerance; processes which remain mechanistically poorly defined. The fine dissection of mechanisms guiding thymocyte migration, differentiation and selection should lead to novel therapeutic strategies targeting developing T cells.
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Affiliation(s)
- Elisa Oltra
- School of Medicine and Dentistry, Universidad Católica de Valencia San Vicente Mártir; Unidad Mixta CIPF-UCV, Centro de Investigación Príncipe Felipe;
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Aghaallaei N, Bajoghli B. Making Thymus Visible: Understanding T-Cell Development from a New Perspective. Front Immunol 2018; 9:375. [PMID: 29552011 PMCID: PMC5840141 DOI: 10.3389/fimmu.2018.00375] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 02/09/2018] [Indexed: 12/17/2022] Open
Abstract
T-cell development is coupled with a highly ordered migratory pattern. Lymphoid progenitors must follow a precise journey; starting from the hematopoietic tissue, they move toward the thymus and then migrate into and out of distinct thymic microenvironments, where they receive signals and cues required for their differentiation into naïve T-cells. Knowing where, when, and how these cells make directional “decisions” is key to understanding T-cell development. Such insights can be gained by directly observing developing T-cells within their environment under various conditions and following specific experimental manipulations. In the last decade, several model systems have been developed to address temporal and spatial aspects of T-cell development using imaging approaches. In this perspective article, we discuss the advantages and limitations of these systems and highlight a particularly powerful in vivo model that has been recently established. This model system enables the migratory behavior of all thymocytes to be studied simultaneously in a noninvasive and quantitative manner, making it possible to perform systems-level studies that reveal fundamental principles governing T-cell dynamics during development and in disease.
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Affiliation(s)
- Narges Aghaallaei
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital, University of Tübingen, Tübingen, Germany
| | - Baubak Bajoghli
- Department of Hematology, Oncology, Immunology, Rheumatology and Pulmonology, University Hospital, University of Tübingen, Tübingen, Germany
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14
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Ortega-Francisco S, de la Fuente-Granada M, Alvarez Salazar EK, Bolaños-Castro LA, Fonseca-Camarillo G, Olguin-Alor R, Alemán-Muench GR, López-Casillas F, Raman C, García-Zepeda EA, Soldevila G. TβRIII is induced by TCR signaling and downregulated in FoxP3+ regulatory T cells. Biochem Biophys Res Commun 2017; 494:82-87. [DOI: 10.1016/j.bbrc.2017.10.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 10/16/2017] [Indexed: 12/12/2022]
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15
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Hwang IY, Park C, Harrison K, Kehrl JH. Normal Thymocyte Egress, T Cell Trafficking, and CD4 + T Cell Homeostasis Require Interactions between RGS Proteins and Gα i2. THE JOURNAL OF IMMUNOLOGY 2017; 198:2721-2734. [PMID: 28235863 DOI: 10.4049/jimmunol.1601433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/24/2017] [Indexed: 11/19/2022]
Abstract
Adaptive immunity depends on mature thymocytes leaving the thymus to enter the bloodstream and the trafficking of T cells through lymphoid organs. Both of these require heterotrimeric Gαi protein signaling, whose intensity and duration are controlled by the regulator of G protein signaling (RGS) proteins. In this study, we show that RGS protein/Gαi2 interactions are essential for normal thymocyte egress, T cell trafficking, and homeostasis. Mature thymocytes with a Gαi2 mutation that disables RGS protein binding accumulated in the perivascular channels of thymic corticomedullary venules. Severe reductions in peripheral naive CD4+ T cells and regulatory T cells occurred. The mutant CD4+ T cells adhered poorly to high endothelial venules and exhibited defects in lymph node entrance and egress. The kinetics of chemokine receptor signaling were disturbed, including chemokine- induced integrin activation. Despite the thymic and lymph node egress defects, sphingosine-1-phosphate signaling was not obviously perturbed. This study reveals how RGS proteins modulate Gαi2 signaling to facilitate thymocyte egress and T cell trafficking.
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Affiliation(s)
- Il-Young Hwang
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Chung Park
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Kathleen Harrison
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - John H Kehrl
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
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16
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Snyder PW, Everds NE, Craven WA, Werner J, Tannehill-Gregg SH, Guzman RE. Maturity-related Variability of the Thymus in Cynomolgus Monkeys (Macaca fascicularis). Toxicol Pathol 2016; 44:874-91. [PMID: 27226125 DOI: 10.1177/0192623316649258] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Terminal body weights (TBWs), thymus weight parameters, and thymus morphology were retrospectively evaluated in 453 cynomolgus monkeys assigned to control groups on nonclinical toxicity studies. Morphology of bone, ovary, and testis/epididymis were used to determine maturity status of individual animals. There was no correlation between TBW and thymus weight (absolute and/or relative to TBW or brain weight). Thymus weight parameters and grades of decreased lymphocytes in the thymus were highly variable in immature animals compared to mature animals. There was also high (up to 11-fold) variability of thymus weight parameters within a given control group on the same study (generally 3 or 4 animals per sex). Several parameters evaluated had more pronounced age-related changes in males when compared to females. Our results demonstrate the inherent variability of thymus weight parameters and morphologic observations for cynomolgus monkeys on toxicology studies. Changes in thymus parameters in cynomolgus monkeys are unreliable indicators of immunomodulation or immunotoxicity in the absence of other relevant findings. Therefore, the thymus parameters commonly evaluated in preclinical safety assessments should not be the primary data set used to determine the presence of a direct test article-related effect on the immune system.
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Affiliation(s)
- Paul W Snyder
- Experimental Pathology Laboratories, West Lafayette, Indiana, USA
| | | | - W A Craven
- Amgen Inc., South San Francisco, California, USA
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17
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Bajoghli B, Kuri P, Inoue D, Aghaallaei N, Hanelt M, Thumberger T, Rauzi M, Wittbrodt J, Leptin M. Noninvasive In Toto Imaging of the Thymus Reveals Heterogeneous Migratory Behavior of Developing T Cells. THE JOURNAL OF IMMUNOLOGY 2015; 195:2177-86. [PMID: 26188059 DOI: 10.4049/jimmunol.1500361] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 06/23/2015] [Indexed: 01/21/2023]
Abstract
The migration of developing T cells (thymocytes) between distinct thymic microenvironments is crucial for their development. Ex vivo studies of thymus tissue explants suggest two distinct migratory behaviors of thymocytes in the thymus. In the cortex, thymocytes exhibit a stochastic migration, whereas medullary thymocytes show confined migratory behavior. Thus far, it has been difficult to follow all thymocytes in an entire thymus and relate their differentiation steps to their migratory dynamics. To understand the spatial organization of the migratory behavior and development of thymocytes in a fully functional thymus, we developed transgenic reporter lines for the chemokine receptors ccr9a and ccr9b, as well as for rag2, and used them for noninvasive live imaging of the entire thymus in medaka (Oryzias latipes). We found that the expression of these two chemokine receptors in the medaka juvenile thymus defined two spatially distinct subpopulations of thymocytes. Landmark events of T cell development including proliferation, somatic recombination, and thymic selection can be mapped to subregions of the thymus. The migratory behavior of thymocytes within each of the subpopulations is equally heterogeneous, and specific migratory behaviors are not associated with particular domains in the thymus. During the period when thymocytes express rag2 their migratory behavior was more homogeneous. Therefore, the migratory behavior of thymocytes is partly correlated with their developmental stage rather than being defined by their spatial localization.
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Affiliation(s)
- Baubak Bajoghli
- European Molecular Biology Laboratory, Directors' Research Unit, 69117-Heidelberg, Germany; and
| | - Paola Kuri
- European Molecular Biology Laboratory, Directors' Research Unit, 69117-Heidelberg, Germany; and
| | - Daigo Inoue
- Center for Organismal Studies, Heidelberg University, 69120-Heidelberg, Germany
| | - Narges Aghaallaei
- Center for Organismal Studies, Heidelberg University, 69120-Heidelberg, Germany
| | - Marleen Hanelt
- European Molecular Biology Laboratory, Directors' Research Unit, 69117-Heidelberg, Germany; and
| | - Thomas Thumberger
- Center for Organismal Studies, Heidelberg University, 69120-Heidelberg, Germany
| | - Matteo Rauzi
- European Molecular Biology Laboratory, Directors' Research Unit, 69117-Heidelberg, Germany; and
| | - Joachim Wittbrodt
- Center for Organismal Studies, Heidelberg University, 69120-Heidelberg, Germany
| | - Maria Leptin
- European Molecular Biology Laboratory, Directors' Research Unit, 69117-Heidelberg, Germany; and
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18
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Vassiliev KA, Polevshchikov AV. Enhancement of rag1 and tdt expression in thymus after immunization. DOKL BIOCHEM BIOPHYS 2015; 462:196-8. [PMID: 26163219 DOI: 10.1134/s1607672915030151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Indexed: 11/23/2022]
Affiliation(s)
- K A Vassiliev
- St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia
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Abstract
Thymic malignancy is often associated with paraneoplastic neurological diseases (PNDs) and recognition of these disorders is important for physicians who treat these patients. The most common thymoma-associated PNDs are myasthenia gravis (MG), acquired neuromyotonia (Isaacs' syndrome), encephalitis, Morvan's syndrome, and myositis. Diagnosis of these disorders is complex but often aided by testing for specific autoantibodies, including those to the acetylcholine receptor for MG and to contactin-associated protein-like 2, protein of the voltage-gated potassium channel complex, in patients with acquired neuromyotonia, Morvan's syndrome, or encephalitis. Patients who manifest these disorders should be screened for thymoma at diagnosis, and worsening of these PNDs may be associated with recurrent thymoma. These disorders can cause profound disability but usually respond to immunotherapy, and often improve with thymoma treatment. Close cooperation among a team of specialists is required to take proper care of these patients.
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Costello P, Sargent M, Maurice D, Esnault C, Foster K, Anjos-Afonso F, Treisman R. MRTF-SRF signaling is required for seeding of HSC/Ps in bone marrow during development. Blood 2015; 125:1244-55. [PMID: 25573994 PMCID: PMC4335080 DOI: 10.1182/blood-2014-08-595603] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 12/30/2014] [Indexed: 12/18/2022] Open
Abstract
Chemokine signaling is important for the seeding of different sites by hematopoietic stem cells (HSCs) during development. Serum response factor (SRF) controls multiple genes governing adhesion and migration, mainly by recruiting members of the myocardin-related transcription factor (MRTF) family of G-actin-regulated cofactors. We used vav-iCre to inactivate MRTF-SRF signaling early during hematopoietic development. In both Srf- and Mrtf-deleted animals, hematopoiesis in fetal liver and spleen is intact but does not become established in fetal bone marrow. Srf-null HSC progenitor cells (HSC/Ps) fail to effectively engraft in transplantation experiments, exhibiting normal proximal signaling responses to SDF-1, but reduced adhesiveness, F-actin assembly, and reduced motility. Srf-null HSC/Ps fail to polarize in response to SDF-1 and cannot migrate through restrictive membrane pores to SDF-1 or Scf in vitro. Mrtf-null HSC/Ps were also defective in chemotactic responses to SDF-1. Srf-null HSC/Ps exhibit substantial deficits in cytoskeletal gene expression. MRTF-SRF signaling is thus critical for expression of genes required for the response to chemokine signaling during hematopoietic development.
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Affiliation(s)
| | | | | | | | - Katie Foster
- Haematopoietic Stem Cell Laboratory, Cancer Research UK, London Research Institute, Lincoln's Inn Fields Laboratories, London, United Kingdom
| | - Fernando Anjos-Afonso
- Haematopoietic Stem Cell Laboratory, Cancer Research UK, London Research Institute, Lincoln's Inn Fields Laboratories, London, United Kingdom
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21
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Cédile O, Løbner M, Toft-Hansen H, Frank I, Wlodarczyk A, Irla M, Owens T. Thymic CCL2 influences induction of T-cell tolerance. J Autoimmun 2014; 55:73-85. [PMID: 25129504 DOI: 10.1016/j.jaut.2014.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 07/18/2014] [Accepted: 07/22/2014] [Indexed: 12/31/2022]
Abstract
Thymic epithelial cells (TEC) and dendritic cells (DC) play a role in T cell development by controlling the selection of the T cell receptor repertoire. DC have been described to take up antigens in the periphery and migrate into the thymus where they mediate tolerance via deletion of autoreactive T cells, or by induction of natural regulatory T cells. Migration of DC to thymus is driven by chemokine receptors. CCL2, a major ligand for the chemokine receptor CCR2, is an inflammation-associated chemokine that induces the recruitment of immune cells in tissues. CCL2 and CCR2 are implicated in promoting experimental autoimmune encephalomyelitis (EAE), a mouse model for multiple sclerosis. We here show that CCL2 is constitutively expressed by endothelial cells and TEC in the thymus. Transgenic mice overexpressing CCL2 in the thymus showed an increased number of thymic plasmacytoid DC and pronounced impairment of T cell development. Consequently, CCL2 transgenic mice were resistant to EAE. These findings demonstrate that expression of CCL2 in thymus regulates DC homeostasis and controls development of autoreactive T cells, thus preventing development of autoimmune diseases.
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Affiliation(s)
- O Cédile
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark
| | - M Løbner
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark
| | - H Toft-Hansen
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark
| | - I Frank
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark
| | - A Wlodarczyk
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark
| | - M Irla
- Centre d'Immunologie de Marseille-Luminy - CIML, Institut National de la Santé et de la Recherche Médicale, U1104, Centre National de la Recherche Scientifique, UMR7280 and Aix Marseille Université, UM2, F-13009 Marseille, France
| | - T Owens
- Institute of Molecular Medicine, Department of Neurobiology Research, University of Southern Denmark, J.B. Winsløwsvej 25, DK-5000 Odense C, Denmark.
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22
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Mendes-da-Cruz DA, Brignier AC, Asnafi V, Baleydier F, Messias CV, Lepelletier Y, Bedjaoui N, Renand A, Smaniotto S, Canioni D, Milpied P, Balabanian K, Bousso P, Leprêtre S, Bertrand Y, Dombret H, Ifrah N, Dardenne M, Macintyre E, Savino W, Hermine O. Semaphorin 3F and neuropilin-2 control the migration of human T-cell precursors. PLoS One 2014; 9:e103405. [PMID: 25068647 PMCID: PMC4113369 DOI: 10.1371/journal.pone.0103405] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 07/01/2014] [Indexed: 01/21/2023] Open
Abstract
Neuropilins and semaphorins are known as modulators of axon guidance, angiogenesis, and organogenesis in the developing nervous system, but have been recently evidenced as also playing a role in the immune system. Here we describe the expression and role of semaphorin 3F (SEMA3F) and its receptor neuropilin-2 (NRP2) in human T cell precursors. NRP2 and SEMA3F are expressed in the human thymus, in both lymphoid and non-lymphoid compartments. SEMA3F have a repulsive effect on thymocyte migration and inhibited CXCL12- and sphingosine-1-phosphate (S1P)-induced thymocyte migration by inhibiting cytoskeleton reorganization prior to stimuli. Moreover, NRP2 and SEMA3F are expressed in human T-cell acute lymphoblastic leukemia/lymphoma primary cells. In these tumor cells, SEMA3F also blocks their migration induced by CXCL12 and S1P. Our data show that SEMA3F and NRP2 are further regulators of human thymocyte migration in physiological and pathological conditions.
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Affiliation(s)
- Daniella Arêas Mendes-da-Cruz
- CNRS UMR8147, Paris Descartes University, Paris, France
- Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
- * E-mail: (DAMC); (OH)
| | - Anne Colette Brignier
- CNRS UMR8147, Paris Descartes University, Paris, France
- Department of Clinical Hematology, Necker Children's Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Vahid Asnafi
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
| | - Frederic Baleydier
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
| | | | - Yves Lepelletier
- CNRS UMR8147, Paris Descartes University, Paris, France
- INSERM U1163, CNRS ERL 8254, Laboratory of cellular and molecular basis of hematological disorders and their therapeutic implications, Imagine Institute, Paris, France
| | - Nawel Bedjaoui
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
| | - Amedée Renand
- CNRS UMR8147, Paris Descartes University, Paris, France
| | - Salete Smaniotto
- Department of Morphology, Federal University of Alagoas, Maceió, Brazil
| | - Danielle Canioni
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
- Department of Morphology, Federal University of Alagoas, Maceió, Brazil
| | | | | | | | | | - Yves Bertrand
- Service of Pediatric Hematology, Hôpital Debrousse, Lyon, France
| | - Hervé Dombret
- University Paris 7, Hôpital Saint-Louis, AP-HP, and Institut Universitaire d'Hématologie EA3518, Paris, France
| | - Norbert Ifrah
- Pôle de Recherche et d'Enseignement Supérieur l'Université Nantes Angers Le Mans, Centre Hospitalier Universitaire Angers, Service des Maladies du Sang and INSERM U892, Angers, France
| | | | - Elizabeth Macintyre
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
| | - Wilson Savino
- Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Olivier Hermine
- CNRS UMR8147, Paris Descartes University, Paris, France
- Laboratory of Oncohematology, AP-HP, Necker Children's Hospital, INSERM U1151, Paris, France
- INSERM U1163, CNRS ERL 8254, Laboratory of cellular and molecular basis of hematological disorders and their therapeutic implications, Imagine Institute, Paris, France
- * E-mail: (DAMC); (OH)
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Li J, Cai H, Jin J, Wang Q, Miao D. X-ray irradiation selectively kills thymocytes of different stages and impairs the maturation of donor-derived CD4(+)CD8(+) thymocytes in recipient thymus. J Biomed Res 2012; 26:355-64. [PMID: 23554771 PMCID: PMC3613732 DOI: 10.7555/jbr.26.20120003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Revised: 02/03/2012] [Accepted: 02/25/2012] [Indexed: 12/13/2022] Open
Abstract
The aim of the present study was to determine whether the sensitivity of thymocytes to X-ray radiation depends on their proliferative states and whether radiation impairs the maturation of donor-derived thymocytes in recipient thymus. We assigned 8-week-old C57BL/6J mice into three treatment groups: 1) untreated; 2) X-ray radiation; 3) X-ray radiation plus bone marrow transplantation with donor bone marrow cells from transgenic mice expressing enhanced green fluorescent protein (GFP) on a universal promoter. After 4 weeks, the size of the thymus, the number and proliferation of thymocytes and ratios of different stage thymocytes were analyzed by immunohistochemistry and flow cytometry. The results showed that: 1) CD4+CD8+ thymocytes were more sensitive to X-ray radiation-induced cell death than other thymocytes; 2) the proliferative capacity of CD4+CD8+ thymocytes was higher than that of other thymocytes; 3) the size of the thymus, the number of thymocytes and ratios of thymocytes of different stages in irradiated mice recovered to the normal level of untreated mice by bone marrow transplantation; 4) the ratio of GFP-positive CD4+CD8+ thymocytes increased significantly, whereas the ratio of GFP-positive CD4+ or CD8+ thymocytes decreased significantly. These results indicate that the degree of sensitivity of thymocytes to X-ray radiation depends on their proliferative states and radiation impairs the maturation of donor-derived CD4+CD8+ thymocytes in recipient thymus.
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Affiliation(s)
- Jinbo Li
- The Research Center for Bone and Stem Cells, Department of Human Anatomy, Nanjing Medical University, Nanjing, Jiangsu 210029, China
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