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Artzy-Schnirman A, Abu-Shah E, Chandrawati R, Altman E, Yusuf N, Wang ST, Ramos J, Hansel CS, Haus-Cohen M, Dahan R, Arif S, Dustin ML, Peakman M, Reiter Y, Stevens MM. Artificial Antigen Presenting Cells for Detection and Desensitization of Autoreactive T cells Associated with Type 1 Diabetes. NANO LETTERS 2022; 22:4376-4382. [PMID: 35616515 PMCID: PMC9185737 DOI: 10.1021/acs.nanolett.2c00819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Autoimmune diseases and in particular type 1 diabetes rely heavily on treatments that target the symptoms rather than prevent the underlying disease. One of the barriers to better therapeutic strategies is the inability to detect and efficiently target rare autoreactive T-cell populations that are major drivers of these conditions. Here, we develop a unique artificial antigen-presenting cell (aAPC) system from biocompatible polymer particles that allows specific encapsulation of bioactive ingredients. Using our aAPC, we demonstrate that we are able to detect rare autoreactive CD4 populations in human patients, and using mouse models, we demonstrate that our particles are able to induce desensitization in the autoreactive population. This system provides a promising tool that can be used in the prevention of autoimmunity before disease onset.
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Affiliation(s)
- Arbel Artzy-Schnirman
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
| | - Enas Abu-Shah
- Kennedy
Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology
and Musculoskeletal Sciences, University
of Oxford, Oxford OX3 7FY, U.K.
- Sir
William Dunn School of Pathology, University
of Oxford, Oxford OX1 3RE, U.K.
| | - Rona Chandrawati
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
| | - Efrat Altman
- Laboratory
of Molecular Immunology, Faculty of Biology and Technion Integrated
Cancer Center, Technion-Israel Institute
of Technology, Haifa 3200003, Israel
| | - Norkhairin Yusuf
- Department
of Immunobiology, Guy’s, King’s
& St Thomas’ School of Medicine, second Floor, New Guy’s
House, Guy’s Hospital, London SE1 9RT, U.K.
| | - Shih-Ting Wang
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
| | - Jose Ramos
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
| | - Catherine S. Hansel
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
| | - Maya Haus-Cohen
- Laboratory
of Molecular Immunology, Faculty of Biology and Technion Integrated
Cancer Center, Technion-Israel Institute
of Technology, Haifa 3200003, Israel
| | - Rony Dahan
- Department
of Systems Immunology, Weizmann Institute
of Science, Rehovot 761001, Israel
| | - Sefina Arif
- Department
of Immunobiology, Guy’s, King’s
& St Thomas’ School of Medicine, second Floor, New Guy’s
House, Guy’s Hospital, London SE1 9RT, U.K.
| | - Michael L. Dustin
- Kennedy
Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology
and Musculoskeletal Sciences, University
of Oxford, Oxford OX3 7FY, U.K.
| | - Mark Peakman
- Department
of Immunobiology, Guy’s, King’s
& St Thomas’ School of Medicine, second Floor, New Guy’s
House, Guy’s Hospital, London SE1 9RT, U.K.
| | - Yoram Reiter
- Laboratory
of Molecular Immunology, Faculty of Biology and Technion Integrated
Cancer Center, Technion-Israel Institute
of Technology, Haifa 3200003, Israel
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, U.K.
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2
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Houeiss P, Boitard C, Luce S. Preclinical Models to Evaluate the Human Response to Autoantigen and Antigen-Specific Immunotherapy in Human Type 1 Diabetes. Front Endocrinol (Lausanne) 2022; 13:883000. [PMID: 35498419 PMCID: PMC9044628 DOI: 10.3389/fendo.2022.883000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Type 1 Diabetes (T1D) is an autoimmune disease that results from the destruction of pancreatic islet β-cells by auto-reactive T cells. The clinical management of T1D faces the lack of fully predictive biomarkers in its preclinical stage and of antigen-specific therapies to induce or re-induce immune tolerance to β-cell autoantigens and prevent its development. From a therapeutic standpoint, preclinical models of T1D have fallen short of directly translating into humans. To circumvent this limitation, preclinical models are being optimized to allow defining autoantigen epitopes that are presented to T cells and directly apply to the human. In this review, we propose to make a point on the latest available models such as humanized immunodeficient NOD mice models and HLA and autoantigen transgenic mice and their application in the context of T1D.
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Affiliation(s)
- Pamela Houeiss
- Laboratory Immunology of Diabetes, Cochin Institute, Department Endocrinology, Metabolism and Diabetologia (EMD), Institut Nationale de la Santé et de la Recherche Médicale, Unité 1016 (INSERMU1016), Paris, France
- Medical Faculty, Paris University, Paris, France
| | - Christian Boitard
- Laboratory Immunology of Diabetes, Cochin Institute, Department Endocrinology, Metabolism and Diabetologia (EMD), Institut Nationale de la Santé et de la Recherche Médicale, Unité 1016 (INSERMU1016), Paris, France
- Medical Faculty, Paris University, Paris, France
| | - Sandrine Luce
- Laboratory Immunology of Diabetes, Cochin Institute, Department Endocrinology, Metabolism and Diabetologia (EMD), Institut Nationale de la Santé et de la Recherche Médicale, Unité 1016 (INSERMU1016), Paris, France
- Medical Faculty, Paris University, Paris, France
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3
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Susukida T, Aoki S, Shirayanagi T, Yamada Y, Kuwahara S, Ito K. HLA transgenic mice: application in reproducing idiosyncratic drug toxicity. Drug Metab Rev 2020; 52:540-567. [PMID: 32847422 DOI: 10.1080/03602532.2020.1800725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Various types of transgenic mice carrying either class I or II human leukocyte antigen (HLA) molecules are readily available, and reports describing their use in a variety of studies have been published for more than 30 years. Examples of their use include the discovery of HLA-specific antigens against viral infection as well as the reproduction of HLA-mediated autoimmune diseases for the development of therapeutic strategies. Recently, HLA transgenic mice have been used to reproduce HLA-mediated idiosyncratic drug toxicity (IDT), a rare and unpredictable adverse drug reaction that can result in death. For example, abacavir-induced IDT has successfully been reproduced in HLA-B*57:01 transgenic mice. Several reports using HLA transgenic mice for IDT have proven the utility of this concept for the evaluation of IDT using various HLA allele combinations and drugs. It has become apparent that such models may be a valuable tool to investigate the mechanisms underlying HLA-mediated IDT. This review summarizes the latest findings in the area of HLA transgenic mouse models and discusses the current challenges that must be overcome to maximize the potential of this unique animal model.
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Affiliation(s)
- Takeshi Susukida
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan.,Laboratory of Cancer Biology and Immunology, Section of Host Defenses, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Shigeki Aoki
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Tomohiro Shirayanagi
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Yushiro Yamada
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Saki Kuwahara
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Kousei Ito
- Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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4
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Lorente E, Barriga A, Barnea E, Palomo C, García-Arriaza J, Mir C, Esteban M, Admon A, López D. Immunoproteomic analysis of a Chikungunya poxvirus-based vaccine reveals high HLA class II immunoprevalence. PLoS Negl Trop Dis 2019; 13:e0007547. [PMID: 31276466 PMCID: PMC6636782 DOI: 10.1371/journal.pntd.0007547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 07/17/2019] [Accepted: 06/11/2019] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Efficient adaptive antiviral cellular and humoral immune responses require previous recognition of viral antigenic peptides bound to human leukocyte antigen (HLA) class I and II molecules, which are exposed on the surface of infected and antigen presenting cells, respectively. The HLA-restricted immune response to Chikungunya virus (CHIKV), a mosquito-borne Alphavirus of the Togaviridae family responsible for severe chronic polyarthralgia and polyarthritis, is largely unknown. METHODOLOGY/PRINCIPAL FINDINGS In this study, a high-throughput mass spectrometry analysis of complex HLA-bound peptide pools isolated from large amounts of human cells infected with a vaccinia virus (VACV) recombinant expressing CHIKV structural proteins was carried out. Twelve viral ligands from the CHIKV polyprotein naturally presented by different HLA-A, -B, and -C class I, and HLA-DR and -DP class II molecules were identified. CONCLUSIONS/SIGNIFICANCE The immunoprevalence of the HLA class II but not the HLA class I-restricted cellular immune response against the CHIKV structural polyprotein was greater than that against the VACV vector itself. In addition, most of the CHIKV HLA class I and II ligands detected by mass spectrometry are not conserved compared to its closely related O'nyong-nyong virus. These findings have clear implications for analysis of both cytotoxic and helper immune responses against CHIKV as well as for the future studies focused in the exacerbated T helper response linked to chronic musculoskeletal disorders in CHIKV patients.
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Affiliation(s)
- Elena Lorente
- Unidad de Presentación y Regulación Inmunes, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda (Madrid), Spain
| | - Alejandro Barriga
- Unidad de Presentación y Regulación Inmunes, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda (Madrid), Spain
| | - Eilon Barnea
- Department of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Concepción Palomo
- Unidad de Presentación y Regulación Inmunes, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda (Madrid), Spain
| | - Juan García-Arriaza
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Carmen Mir
- Unidad de Presentación y Regulación Inmunes, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda (Madrid), Spain
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Arie Admon
- Department of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Daniel López
- Unidad de Presentación y Regulación Inmunes, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda (Madrid), Spain
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5
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Proinsulin-mediated induction of type 1 diabetes in HLA-DR4-transgenic mice. Sci Rep 2018; 8:14106. [PMID: 30237494 PMCID: PMC6148278 DOI: 10.1038/s41598-018-32546-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/07/2018] [Indexed: 11/23/2022] Open
Abstract
Antigen-specific immunotherapy of autoimmune disease currently remains the only potentially curative approach. However, translation of promising pre-clinical results into successful clinical application has proven challenging. In part, this is because pre-clinical findings in mouse models have to be redesigned for human application due to differences in MHC II. To reduce the gap between pre-clinical and clinical studies, we have created a novel mouse model that expresses human HLA-DR4, but no endogenous MHC on antigen-presenting cells. Moreover, human B7.1 (CD80) is expressed in the pancreatic islets under the control of the rat insulin promoter. Although this model does not develop diabetes spontaneously, it is susceptible to the induction of type 1 diabetes by challenging mice with overlapping peptides derived from murine proinsulin-2 in adjuvant. Unlike the NOD model of spontaneous type 1 diabetes, but akin to the human condition, this model does not have a gender bias. Furthermore, similar to the human condition, the disease is characterised by a diverse leucocyte infiltration of the pancreatic islets and the formation of anti-proinsulin auto-antibodies. The model that we report here offers detailed insights into type-1 diabetes and is expected to prove instrumental when studying the mechanism of action in translational, antigen-specific immunotherapy.
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6
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Lorente E, Barriga A, Barnea E, Mir C, Gebe JA, Admon A, López D. Structural and Nonstructural Viral Proteins Are Targets of T-Helper Immune Response against Human Respiratory Syncytial Virus. Mol Cell Proteomics 2016; 15:2141-51. [PMID: 27090790 DOI: 10.1074/mcp.m115.057356] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Indexed: 11/06/2022] Open
Abstract
Proper antiviral humoral and cellular immune responses require previous recognition of viral antigenic peptides that are bound to HLA class II molecules, which are exposed on the surface of antigen-presenting cells. The helper immune response is critical for the control and the clearance of human respiratory syncytial virus (HRSV) infection, a virus with severe health risk in infected pediatric, immunocompromised, and elderly populations. In this study, using a mass spectrometry analysis of complex HLA class II-bound peptide pools that were isolated from large amounts of HRSV-infected cells, 19 naturally processed HLA-DR ligands, most of them included in a complex nested set of peptides, were identified. Both the immunoprevalence and the immunodominance of the HLA class II response to HRSV were focused on one nonstructural (NS1) and two structural (matrix and mainly fusion) proteins of the infective virus. These findings have clear implications for analysis of the helper immune response as well as for antiviral vaccine design.
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Affiliation(s)
- Elena Lorente
- From the ‡Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Alejandro Barriga
- From the ‡Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - Eilon Barnea
- §Department of Biology, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Carmen Mir
- From the ‡Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain
| | - John A Gebe
- ¶Benaroya Research Institute, Seattle, WA 98101, USA
| | - Arie Admon
- §Department of Biology, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Daniel López
- From the ‡Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Majadahonda (Madrid), Spain,
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7
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Dahan R, Gebe JA, Preisinger A, James EA, Tendler M, Nepom GT, Reiter Y. Antigen-specific immunomodulation for type 1 diabetes by novel recombinant antibodies directed against diabetes-associates auto-reactive T cell epitope. J Autoimmun 2013; 47:83-93. [PMID: 24090977 DOI: 10.1016/j.jaut.2013.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 08/19/2013] [Accepted: 08/26/2013] [Indexed: 12/29/2022]
Abstract
The trimolecular complex composed of autoreactive T-cell receptor, MHC class II, and an autoantigenic peptide plays a central role in the activation of pathogenic Islet-specific CD4+ T cells in type 1 diabetes (T1D). We isolated and characterized novel antibodies against autoreactive T-cell epitopes associated with T1D. Our antibodies mimic the specificity of the T-cell receptor (TCR), while binding MHC class II/peptide complexes in an autoantigen peptide specific, MHC-restricted manner. The isolated TCR-like antibodies were directed against the minimal T-cell epitope GAD-555-567 in the context of the HLA-DR4-diabetic-associated molecule. A representative high-affinity TCR-like antibody clone (G3H8) enabled the detection of intra- and extra-cellular DR4/GAD-555-567 complexes in antigen presenting cells. I561M single mutation at the central position (P5) of the GAD-555-567 peptide abolished the binding of G3H8 to the DR4/GAD complex, demonstrating its high fine TCR-like specificity. The G3H8 TCR-like antibody significantly inhibited GAD-555-567 specific, DR4 restricted T-cell response in vitro and in vivo in HLA-DR4 transgenic mice. Our findings constitute a proof-of-concept for the utility of TCR-like antibodies as antigen-specific immunomodulation agents for regulating pathogenic T-cells and suggest that TCR-like antibodies targeting autoreactive MHC class II epitopes are valuable research tools that enable studies related to antigen presentation as well as novel therapeutic agents that may be used to modulate autoimmune disorders such as T1D.
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Affiliation(s)
- Rony Dahan
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel.
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8
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Agrawal A, Gupta S. Impact of aging on dendritic cell functions in humans. Ageing Res Rev 2011; 10:336-45. [PMID: 20619360 DOI: 10.1016/j.arr.2010.06.004] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 06/18/2010] [Accepted: 06/21/2010] [Indexed: 12/12/2022]
Abstract
Aging is a paradox of reduced immunity and chronic inflammation. Dendritic cells are central orchestrators of the immune response with a key role in the generation of immunity and maintenance of tolerance. The functions of DCs are compromised with age. There is no major effect on the numbers and phenotype of DC subsets in aged subjects; nevertheless, their capacity to phagocytose antigens and migrate is impaired with age. There is aberrant cytokine secretion by various DC subsets with CDCs secreting increased basal level of pro-inflammatory cytokines but the response on stimulation to foreign antigens is decreased. In contrast, the response to self-antigens is increased suggesting erosion of peripheral self tolerance. PDC subset also secretes reduced IFN-α in response to viruses. The capacity of DCs to prime T cell responses is also affected. Aging thus has a profound affect on DC functions. Present review summarizes the effect of advancing age on DC functions in humans in the context of both immunity and tolerance.
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Affiliation(s)
- Anshu Agrawal
- Division of Basic and Clinical Immunology, Med. Sci. I C-240A, University of California, Irvine 92697, CA, USA.
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9
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Kawamura K, Yao K, Shukaliak-Quandt JA, Huh J, Baig M, Quigley L, Ito N, Necker A, McFarland HF, Muraro PA, Martin R, Ito K. Different development of myelin basic protein agonist- and antagonist-specific human TCR transgenic T cells in the thymus and periphery. THE JOURNAL OF IMMUNOLOGY 2008; 181:5462-72. [PMID: 18832703 DOI: 10.4049/jimmunol.181.8.5462] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Myelin basic protein (MBP)-specific T cells are thought to play a role in the development of multiple sclerosis. MBP residues 111-129 compose an immunodominant epitope cluster restricted by HLA-DRB1*0401. The sequence of residues 111-129 of MBP (MBP(111-129)) differs in humans (MBP122:Arg) and mice (MBP122:Lys) at aa 122. We previously found that approximately 50% of human MBP(111-129) (MBP122:Arg)-specific T cell clones, including MS2-3C8 can proliferate in response to mouse MBP(111-129) (MBP122:Lys). However, the other half of T cell clones, including HD4-1C2, cannot proliferate in response to MBP(111-129) (MBP122:Lys). We found that MBP(111-129) (MBP122:Lys) is an antagonist for HD4-1C2 TCR, therefore, MS2-3C8 and HD4-1C2 TCRs are agonist- and antagonist-specific TCRs in mice, respectively. Therefore, we examined the development of HD4-1C2 TCR and MS2-3C8 TCR transgenic (Tg) T cells in the thymus and periphery. We found that dual TCR expression exclusively facilitates the development of MBP(111-129) TCR Tg T cells in the periphery of HD4-1C2 TCR/HLA-DRB1*0401 Tg mice although it is not required for their development in the thymus. We also found that MS2-3C8 TCR Tg CD8(+) T cells develop along with MS2-3C8 TCR Tg CD4(+) T cells, and that dual TCR expression was crucial for the development of MS2-3C8 TCR Tg CD4(+) and CD8(+) T cells in the thymus and periphery, respectively. These results suggest that thymic and peripheral development of MBP-specific T cells are different; however, dual TCR expression can facilitate their development.
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Affiliation(s)
- Kazuyuki Kawamura
- Neuroimmunology Branch, National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892, USA
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10
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Gebe JA, Unrath KA, Yue BB, Miyake T, Falk BA, Nepom GT. Autoreactive human T-cell receptor initiates insulitis and impaired glucose tolerance in HLA DR4 transgenic mice. J Autoimmun 2007; 30:197-206. [PMID: 17949947 DOI: 10.1016/j.jaut.2007.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 08/21/2007] [Accepted: 08/22/2007] [Indexed: 02/09/2023]
Abstract
A human T-cell receptor (TcR) derived from an autoreactive T-cell specific for GAD65, from a subject at high risk for autoimmune diabetes, was introduced into HLA-DR4 transgenic mice. The source of TcR was a CD4(+) T(H)1(+) T-cell clone which responded to an immunodominant epitope of the human islet protein GAD65, an epitope shared with both GAD65 and GAD67 in the mouse. The resulting HLA-DR4/GAD-TcR transgenic mice on a Rag2(o/o)/I-Ab(o/o)/B6 background exhibited a CD4(+) infiltrate into pancreatic islets that correlated with a loss of insulin in infiltrated islets. These mice also exhibited a subclinical impaired tolerance to exogenously fed glucose as assayed by an intraperitoneal glucose tolerance test. T cells containing the GAD65/67 (555-567) responsive TcR undergo strong negative selection as evidenced by a 10-fold lower thymocyte cellularity compared to non-TcR transgenic mice, and clonotype peripheral T cells represented approximately 1% of CD4(+) T cells in Rag2 sufficient mice. Upon in vitro stimulation, GAD65/67 555-567 responsive T cells secrete interferon-gamma, minimal interleukin (IL)-2 and tumor necrosis factor-alpha, and no IL-4, IL-5, IL-10, or IL-17, consistent with a T(H)1 profile. These data demonstrate that CD4(+) T cells specific for a naturally processed epitope within GAD can specifically home to pancreatic islets and lead to impaired islet beta-cell function in diabetes-associated HLA-DR4 transgenic mice on the relatively non-autoimmune C57BL/6 background. The relatively slow progression and patchy insulitis are reminiscent of the chronic pre-clinical phase similar to a majority of human at-risk subjects, and models these indolent features of human T1D.
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Affiliation(s)
- John A Gebe
- Department of Diabetes, Benaroya Research Institute, 1201 Ninth Avenue, Seattle, WA 98101, USA.
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11
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Ling S, Pi X, Holoshitz J. The Rheumatoid Arthritis Shared Epitope Triggers Innate Immune Signaling via Cell Surface Calreticulin. THE JOURNAL OF IMMUNOLOGY 2007; 179:6359-67. [DOI: 10.4049/jimmunol.179.9.6359] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Wang R, Han G, Wang J, Song L, Chen G, Xu R, Yu M, Qian J, Shen B, Li Y. Foxp3-expressing CD4(+)T cells under the control of INF-gamma promoter prevent diabetes in NOD mice. Mol Ther 2007; 15:1551-7. [PMID: 17534268 DOI: 10.1038/sj.mt.6300208] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Foxp3-transduced CD4(+)T-cells have been used for treating autoimmune diseases such as type I diabetes. However, while suppressing the activity of pathogenic T cells, they could suppress the activity of bystander T cells as well. Therefore more specific strategies need to be developed. We designed and tested a new strategy that involves converting pathogenic CD4(+)Th1 cells into regulatory T-cells by lentiviral transduction with Foxp3 under the control of interferon-gamma (IFN-gamma) promoter (IgammaP-Foxp3). After transduction under the IgammaP control, Foxp3 expression in diabetic CD4(+)Th1 cells was favored. IgammaP-Foxp3-transduced CD4(+)T cells were anergic in vitro to stimulation by antigen. The process of IgammaP-Foxp3-transduced CD4(+)T cells differentiating into Treg cells and Treg cells losing their phenotype and functions has the effect of significantly suppressing incidence and onset of diabetes and autoantigen-specific T cell response, while increasing/maintaining endogenous Tregs in nonobese diabetic (NOD) mice recipients. In this manner, CD4(+)T cells of greater specificity were developed by transducing pathogenic CD4(+)Th1 cells with Foxp3 under the control of IgammaP, in order to prevent diabetes in NOD mice. The findings of this study provide a basis for more reasonable regulatory T cells (Tregs)-based therapy, with autoimmunity being suppressed through indirect means known as "infectious tolerance".
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Affiliation(s)
- Renxi Wang
- Department of Molecular Immunology, Institute of Basic Medical Sciences, Beijing, People's Republic of China
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13
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Gebe JA, Falk B, Unrath K, Nepom GT. Autoreactive T cells in a partially humanized murine model of T1D. Ann N Y Acad Sci 2007; 1103:69-76. [PMID: 17376837 DOI: 10.1196/annals.1394.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Glutamic acid decarboxylase (GAD65) and insulin are implicated as target antigens in the pathogenesis of human diabetes through correlative measurements of humoral and cellular reactivity to them in diabetics and at-risk diabetic individuals. Recently, an age-dependent loss of tolerance to one of several naturally processed epitopes of GAD65 (555-567) has been observed to precede diabetes in diabetes-prone mice transgenic for diabetes-correlated human class II genes. Extended studies in these mice (RIP-B7/DR0404) now show that tolerance is maintained to another DR4-restricted naturally processed region within GAD65. While tolerance is lost to GAD65 (555-567) in B7/DR0404 mice prior to diabetes, these mice remain T cell-tolerant to GAD65 (273-286). Prediabetes loss of tolerance to GAD65 (555-567) has now been shown to correlate with an impaired response to exogenous glucose in an intraperitoneal (i.p.) glucose tolerance test. In addition, these mice exhibit a T cell response to insulin A(6-21) at the hyperglycemic state. Investigating a possible cause-and-effect relationship between T cell reactivity to GAD65 and diabetes pathogenesis, GAD65 (555-567) T cell receptor (TcR) transgenic mice have been generated and future work is aimed at understanding the importance of T cell GAD65 reactivity and its role in diabetes progression.
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Affiliation(s)
- John A Gebe
- Department of Immunology, Benaroya Research Institute at Virginia Mason, 1201 9th Ave. Seattle, WA 98101, USA.
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