1
|
Artuc M, Zuberbier T, Peiser M. Nickel Challenge In Vitro Affects CD38 and HLA-DR Expression in T Cell Subpopulations from the Blood of Patients with Nickel Allergy. Int J Mol Sci 2023; 25:298. [PMID: 38203472 PMCID: PMC10778727 DOI: 10.3390/ijms25010298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/20/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024] Open
Abstract
Nickel allergy is a major health problem and shows clinical manifestation of contact eczema. The response of specific lymphocyte subpopulations in sensitized patients after new challenge to nickel has until now not been studied in detail. To evaluate if nickel-based elicitation reaction could be objectively identified by multi-parametric flow cytometry, immunophenotyping of specific T cells was applied. White blood cells from 7 patients (4 positive in patch test, 3 negative) were challenged by nickel and in vitro short-term culture. Standardized antibody-dye combinations, specific for T helper(h)1, Th17 and cytotoxic T cell activation, were selected according to the recommendations of Stanford Human Immune Monitoring Center. In cytotoxic CD8+CCR7+CD45RA+ T cells from patients suffering from nickel allergy, CD38 and HLA-DR were elevated comparing to healthy donors. After challenge to nickel in vitro both markers decreased in CD8+CCR7+CD45RA+ T cells but found up-regulated in CD4+CCR7+CD45RA+CCR6-CXCR3+Th1 cells. Intracellular expression of T-bet and RORγt further indicated Th1 and Th17 cells. Finally, CD4+CD25+CCR4- T cells increased after challenge with nickel in PBMCs of patients with nickel allergy. Flow cytometry based quantification of T cell markers might be used as a specific and reliable method to detect chemical induced skin sensitization and confirm diagnostic patch testing in the clinics.
Collapse
Affiliation(s)
- Metin Artuc
- Department of Dermatology and Allergy, Allergy Center Charité, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Torsten Zuberbier
- Berlin Institute of Allergology, Charité-Universitätsmedizin, Campus Benjamin Franklin, 12203 Berlin, Germany;
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, 12203 Berlin, Germany
| | - Matthias Peiser
- Institute for Chemistry and Biochemistry, Free University Berlin, 14195 Berlin, Germany
| |
Collapse
|
2
|
Hertweck A, Vila de Mucha M, Barber PR, Dagil R, Porter H, Ramos A, Lord GM, Jenner RG. The TH1 cell lineage-determining transcription factor T-bet suppresses TH2 gene expression by redistributing GATA3 away from TH2 genes. Nucleic Acids Res 2022; 50:4557-4573. [PMID: 35438764 PMCID: PMC9071441 DOI: 10.1093/nar/gkac258] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 03/28/2022] [Accepted: 04/13/2022] [Indexed: 11/12/2022] Open
Abstract
Lineage-determining transcription factors (LD-TFs) drive the differentiation of progenitor cells into a specific lineage. In CD4+ T cells, T-bet dictates differentiation of the TH1 lineage, whereas GATA3 drives differentiation of the alternative TH2 lineage. However, LD-TFs, including T-bet and GATA3, are frequently co-expressed but how this affects LD-TF function is not known. By expressing T-bet and GATA3 separately or together in mouse T cells, we show that T-bet sequesters GATA3 at its target sites, thereby removing GATA3 from TH2 genes. This redistribution of GATA3 is independent of GATA3 DNA binding activity and is instead mediated by the T-bet DNA binding domain, which interacts with the GATA3 DNA binding domain and changes GATA3's sequence binding preference. This mechanism allows T-bet to drive the TH1 gene expression program in the presence of GATA3. We propose that redistribution of one LD-TF by another may be a common mechanism that could explain how specific cell fate choices can be made even in the presence of other transcription factors driving alternative differentiation pathways.
Collapse
Affiliation(s)
- Arnulf Hertweck
- UCL Cancer Institute and Cancer Research UK UCL Centre, University College London (UCL), London, WC1E 6BT, UK
| | - Maria Vila de Mucha
- UCL Cancer Institute and Cancer Research UK UCL Centre, University College London (UCL), London, WC1E 6BT, UK
| | - Paul R Barber
- UCL Cancer Institute and Cancer Research UK UCL Centre, University College London (UCL), London, WC1E 6BT, UK.,Comprehensive Cancer Centre, School of Cancer & Pharmaceutical Sciences, King's College London, London, SE1 1UL, UK
| | - Robert Dagil
- Research Department of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6XA, UK
| | - Hayley Porter
- UCL Cancer Institute and Cancer Research UK UCL Centre, University College London (UCL), London, WC1E 6BT, UK
| | - Andres Ramos
- Research Department of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6XA, UK
| | - Graham M Lord
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9NT, UK
| | - Richard G Jenner
- UCL Cancer Institute and Cancer Research UK UCL Centre, University College London (UCL), London, WC1E 6BT, UK
| |
Collapse
|
3
|
Ding X, Chang Y, Wang S, Yan D, Yao J, Zhu G. Transcriptomic Analysis of the Effect of GAT-2 Deficiency on Differentiation of Mice Naïve T Cells Into Th1 Cells In Vitro. Front Immunol 2021; 12:667136. [PMID: 34149704 PMCID: PMC8208808 DOI: 10.3389/fimmu.2021.667136] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/17/2021] [Indexed: 12/14/2022] Open
Abstract
The neurotransmitter γ-aminobutyric acid (GABA) is known to affect the activation and function of immune cells. This study investigated the role of GABA transporter (GAT)-2 in the differentiation of type 1 helper T (Th1) cells. Naïve CD4+ T cells isolated from splenocytes of GAT-2 knockout (KO) and wild-type (WT) mice were cultured; Th1 cell differentiation was induced and transcriptome and bioinformatics analyses were carried out. We found that GAT-2 deficiency promoted the differentiation of naïve T cells into Th1 cells. RNA sequencing revealed 2984 differentially expressed genes including 1616 that were up-regulated and 1368 that were down-regulated in GAT-2 KO cells compared to WT cells, which were associated with 950 enriched Gene Ontology terms and 33 enriched Kyoto Encyclopedia of Genes and Genomes pathways. Notably, 4 signal transduction pathways (hypoxia-inducible factor [HIF]-1, Hippo, phospholipase D, and Janus kinase [JAK]/signal transducer and activator of transcription [STAT]) and one metabolic pathway (glycolysis/gluconeogenesis) were significantly enriched by GAT-2 deficiency, suggesting that these pathways mediate the effect of GABA on T cell differentiation. Our results provide evidence for the immunomodulatory function of GABA signaling in T cell-mediated immunity and can guide future studies on the etiology and management of autoimmune diseases.
Collapse
Affiliation(s)
- Xueyan Ding
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Yajie Chang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Siquan Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Dong Yan
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Jiakui Yao
- Clinical Medical College, Yangzhou University, Yangzhou, China
| | - Guoqiang Zhu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| |
Collapse
|
4
|
Tanaka K, Martinez GJ, Yan X, Long W, Ichiyama K, Chi X, Kim BS, Reynolds JM, Chung Y, Tanaka S, Liao L, Nakanishi Y, Yoshimura A, Zheng P, Wang X, Tian Q, Xu J, O'Malley BW, Dong C. Regulation of Pathogenic T Helper 17 Cell Differentiation by Steroid Receptor Coactivator-3. Cell Rep 2019; 23:2318-2329. [PMID: 29791844 DOI: 10.1016/j.celrep.2018.04.088] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 02/12/2018] [Accepted: 04/19/2018] [Indexed: 12/24/2022] Open
Abstract
T helper 17 (Th17) cell development is programmed by the orphan nuclear receptor RORγt, but the underlying mechanism is not well understood. Nuclear receptor-mediated transcriptional activation depends on coactivators. Here, we show that steroid receptor coactivator-3 (SRC-3) critically regulates Th17 cell differentiation. Reduced incidence of experimental autoimmune encephalitis (EAE) associated with decreased Th17 cell generation in vivo was observed in mice with SRC-3 deletion specifically in T cells. In vitro, SRC-3 deficiency did not affect TGF-β/IL-6-induced Th17 cell generation but severely impaired pathogenic Th17 differentiation induced by IL-1/IL-6/IL-23. Microarray analysis revealed that SRC-3 not only regulates IL-17A but also IL-1R1 expression. SRC-3 bound to Il17a and Il1r1 loci in a RORγt-dependent manner and was required for recruitment of the p300 acetyltransferase. Thus, SRC-3 is critical for RORγt-dependent gene expression in Th17 cell-driven autoimmune diseases.
Collapse
Affiliation(s)
- Kentaro Tanaka
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA; Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka 8128582, Japan; Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 1608582, Japan
| | - Gustavo J Martinez
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Xiaowei Yan
- Institute for Systems Biology, Seattle, WA 98109, USA
| | - Weiwen Long
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kenji Ichiyama
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA; Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka 8128582, Japan; Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 1608582, Japan
| | - Xinxin Chi
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Byung-Seok Kim
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Joseph M Reynolds
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Yeonseok Chung
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Shinya Tanaka
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Lan Liao
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yoichi Nakanishi
- Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka 8128582, Japan
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 1608582, Japan
| | - Pan Zheng
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Xiaohu Wang
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China
| | - Qiang Tian
- Institute for Systems Biology, Seattle, WA 98109, USA
| | - Jianming Xu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chen Dong
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
5
|
Liu J, Bai LP, Yang F, Yao X, Lei K, Kei Lam CW, Wu Q, Zhuang Y, Xiao R, Liao K, Kuok H, Li T, Liu L. Potent Antagonists of RORγt, Cardenolides from Calotropis gigantea, Exhibit Discrepant Effects on the Differentiation of T Lymphocyte Subsets. Mol Pharm 2018; 16:798-807. [DOI: 10.1021/acs.molpharmaceut.8b01063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Li-Ping Bai
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Fen Yang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Xiaojun Yao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Kawai Lei
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Christopher Wai Kei Lam
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Qibiao Wu
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Yuxin Zhuang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Riping Xiao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Kangsheng Liao
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Hioha Kuok
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Ting Li
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| | - Liang Liu
- State Key Laboratory of Quality Research in Chinese Medicines, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau 999078, People’s Republic of China
| |
Collapse
|
6
|
Brucklacher-Waldert V, Ferreira C, Stebegg M, Fesneau O, Innocentin S, Marie JC, Veldhoen M. Cellular Stress in the Context of an Inflammatory Environment Supports TGF-β-Independent T Helper-17 Differentiation. Cell Rep 2018; 19:2357-2370. [PMID: 28614720 PMCID: PMC5483510 DOI: 10.1016/j.celrep.2017.05.052] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 03/27/2017] [Accepted: 05/15/2017] [Indexed: 12/26/2022] Open
Abstract
T helper-17 (Th17) cells are associated with inflammatory disorders and cancer. We report that environmental conditions resulting in cellular stress, such as low oxygen, glucose, and isotonic stress, particularly enhance the generation of Th17 cells. Pharmacological inhibition of cell stress reduces Th17 cell differentiation while stress inducers enhance the development of Th17 cells. The cellular stress response results in Th17 cell development via sustained cytoplasmic calcium levels and, in part, XBP1 activity. Furthermore, in an inflammatory environment, conditions resulting in cell stress can bring about de novo Th17 cell differentiation, even in the absence of transforming growth factor β (TGF-β) signaling. In vivo, cell stress inhibition enhances resistance to Th17-mediated autoimmunity while stress-exposed T cells enhance disease severity. Adverse metabolic environments during inflammation provide a link between adaptive immunity and inflammation and may represent a risk factor for the development of chronic inflammatory conditions by facilitating Th17 cell differentiation.
Collapse
Affiliation(s)
| | - Cristina Ferreira
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK; Faculdade de Medicina da Universidade de Lisboa, Instituto de Medicina Molecular, Av. Professor Egas Moniz, Lisbon 1649-028, Portugal
| | - Marisa Stebegg
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Olivier Fesneau
- Immunology Virology and Inflammation Department, Cancer Research Center of Lyon UMR INSERM1052, CNRS 5286 28 rue Laennec, Lyon 69373, Cedex 08, France; Université Lyon 1, Lyon 69000, France; Centre Léon Bérard, Lyon 69008, France; Labex DEVweCAN, Lyon 69008, France
| | - Silvia Innocentin
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Julien C Marie
- Immunology Virology and Inflammation Department, Cancer Research Center of Lyon UMR INSERM1052, CNRS 5286 28 rue Laennec, Lyon 69373, Cedex 08, France; Université Lyon 1, Lyon 69000, France; Centre Léon Bérard, Lyon 69008, France; Labex DEVweCAN, Lyon 69008, France; TGFβ and Immuno-Evasion Group, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Marc Veldhoen
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK; Faculdade de Medicina da Universidade de Lisboa, Instituto de Medicina Molecular, Av. Professor Egas Moniz, Lisbon 1649-028, Portugal.
| |
Collapse
|
7
|
Konjar Š, Ferreira C, Blankenhaus B, Veldhoen M. Intestinal Barrier Interactions with Specialized CD8 T Cells. Front Immunol 2017; 8:1281. [PMID: 29075263 PMCID: PMC5641586 DOI: 10.3389/fimmu.2017.01281] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 09/25/2017] [Indexed: 01/09/2023] Open
Abstract
The trillions of microorganisms that reside in the gastrointestinal tract, essential for nutrient absorption, are kept under control by a single cell barrier and large amounts of immune cells. Intestinal epithelial cells (IECs) are critical in establishing an environment supporting microbial colonization and immunological tolerance. A large population of CD8+ T cells is in direct and constant contact with the IECs and the intraepithelial lymphocytes (IELs). Due to their location, at the interphase of the intestinal lumen and external environment and the host tissues, they seem ideally positioned to balance immune tolerance and protection to preserve the fragile intestinal barrier from invasion as well as immunopathology. IELs are a heterogeneous population, with a large innate-like contribution of unknown specificity, intercalated with antigen-specific tissue-resident memory T cells. In this review, we provide a comprehensive overview of IEL physiology and how they interact with the IECs and contribute to immune surveillance to preserve intestinal homeostasis and host-microbial relationships.
Collapse
Affiliation(s)
- Špela Konjar
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - Cristina Ferreira
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - Birte Blankenhaus
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - Marc Veldhoen
- Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| |
Collapse
|
8
|
Brucklacher-Waldert V, Ferreira C, Innocentin S, Kamdar S, Withers DR, Kullberg MC, Veldhoen M. Tbet or Continued RORγt Expression Is Not Required for Th17-Associated Immunopathology. THE JOURNAL OF IMMUNOLOGY 2016; 196:4893-904. [PMID: 27183623 PMCID: PMC4891569 DOI: 10.4049/jimmunol.1600137] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 04/14/2016] [Indexed: 01/08/2023]
Abstract
The discovery of Th17 cell plasticity, in which CD4+ IL-17–producing Th17 cells give rise to IL-17/IFN-γ double-producing cells and Th1-like IFNγ+ ex-Th17 lymphocytes, has raised questions regarding which of these cell types contribute to immunopathology during inflammatory diseases. In this study, we show using Helicobacter hepaticus-induced intestinal inflammation that IL-17ACre– or Rag1Cre-mediated deletion of Tbx21 has no effect on the generation of IL-17/IFN-γ double-producing cells, but leads to a marked absence of Th1-like IFNγ+ ex-Th17 cells. Despite the lack of Th1-like ex-Th17 cells, the degree of H. hepaticus-triggered intestinal inflammation in mice in which Tbx21 was excised in IL-17–producing or Rag1-expressing cells is indistinguishable from that observed in control mice. In stark contrast, using experimental autoimmune encephalomyelitis, we show that IL-17ACre–mediated deletion of Tbx21 prevents the conversion of Th17 cells to IL-17A/IFN-γ double-producing cells as well as Th1-like IFN-γ+ ex-Th17 cells. However, IL-17ACre–mediated deletion of Tbx21 has only limited effects on disease course in this model and is not compensated by Ag-specific Th1 cells. IL-17ACre–mediated deletion of Rorc reveals that RORγt is essential for the maintenance of the Th17 cell lineage, but not immunopathology during experimental autoimmune encephalomyelitis. These results show that neither the single Th17 subset, nor its progeny, is solely responsible for immunopathology or autoimmunity.
Collapse
Affiliation(s)
- Verena Brucklacher-Waldert
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge CB22 3AT, United Kingdom
| | - Cristina Ferreira
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge CB22 3AT, United Kingdom
| | - Silvia Innocentin
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge CB22 3AT, United Kingdom
| | - Shraddha Kamdar
- Centre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York YO10 5DD, United Kingdom; and
| | - David R Withers
- Medical Research Council Centre for Immune Regulation, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Marika C Kullberg
- Centre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York YO10 5DD, United Kingdom; and
| | - Marc Veldhoen
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge CB22 3AT, United Kingdom;
| |
Collapse
|
9
|
|
10
|
Brucklacher-Waldert V, Carr EJ, Linterman MA, Veldhoen M. Cellular Plasticity of CD4+ T Cells in the Intestine. Front Immunol 2014; 5:488. [PMID: 25339956 PMCID: PMC4188036 DOI: 10.3389/fimmu.2014.00488] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/22/2014] [Indexed: 01/07/2023] Open
Abstract
Barrier sites such as the gastrointestinal tract are in constant contact with the environment, which contains both beneficial and harmful components. The immune system at the epithelia must make the distinction between these components to balance tolerance, protection, and immunopathology. This is achieved via multifaceted immune recognition, highly organized lymphoid structures, and the interaction of many types of immune cells. The adaptive immune response in the gut is orchestrated by CD4+ helper T (Th) cells, which are integral to gut immunity. In recent years, it has become apparent that the functional identity of these Th cells is not as fixed as initially thought. Plasticity in differentiated T cell subsets has now been firmly established, in both health and disease. The gut, in particular, utilizes CD4+ T cell plasticity to mold CD4+ T cell phenotypes to maintain its finely poised balance of tolerance and inflammation and to encourage biodiversity within the enteric microbiome. In this review, we will discuss intestinal helper T cell plasticity and our current understanding of its mechanisms, including our growing knowledge of an evolutionarily ancient symbiosis between microbiota and malleable CD4+ T cell effectors.
Collapse
Affiliation(s)
| | - Edward J Carr
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute , Cambridge , UK
| | - Michelle A Linterman
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute , Cambridge , UK
| | - Marc Veldhoen
- Laboratory for Lymphocyte Signalling and Development, The Babraham Institute , Cambridge , UK
| |
Collapse
|
11
|
Di-(2-ethylhexyl) phthalate adjuvantly induces imbalanced humoral immunity in ovalbumin-sensitized BALB/c mice ascribing to T follicular helper cells hyperfunction. Toxicology 2014; 324:88-97. [DOI: 10.1016/j.tox.2014.07.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 07/28/2014] [Accepted: 07/30/2014] [Indexed: 12/21/2022]
|
12
|
Microwave & magnetic (M2) proteomics reveals CNS-specific protein expression waves that precede clinical symptoms of experimental autoimmune encephalomyelitis. Sci Rep 2014; 4:6210. [PMID: 25182730 PMCID: PMC4152753 DOI: 10.1038/srep06210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 07/28/2014] [Indexed: 11/09/2022] Open
Abstract
Central nervous system-specific proteins (CSPs), transported across the damaged blood-brain-barrier (BBB) to cerebrospinal fluid (CSF) and blood (serum), might be promising diagnostic, prognostic and predictive protein biomarkers of disease in individual multiple sclerosis (MS) patients because they are not expected to be present at appreciable levels in the circulation of healthy subjects. We hypothesized that microwave &magnetic (M(2)) proteomics of CSPs in brain tissue might be an effective means to prioritize putative CSP biomarkers for future immunoassays in serum. To test this hypothesis, we used M(2) proteomics to longitudinally assess CSP expression in brain tissue from mice during experimental autoimmune encephalomyelitis (EAE), a mouse model of MS. Confirmation of central nervous system (CNS)-infiltrating inflammatory cell response and CSP expression in serum was achieved with cytokine ELISPOT and ELISA immunoassays, respectively, for selected CSPs. M(2) proteomics (and ELISA) revealed characteristic CSP expression waves, including synapsin-1 and α-II-spectrin, which peaked at day 7 in brain tissue (and serum) and preceded clinical EAE symptoms that began at day 10 and peaked at day 20. Moreover, M(2) proteomics supports the concept that relatively few CNS-infiltrating inflammatory cells can have a disproportionally large impact on CSP expression prior to clinical manifestation of EAE.
Collapse
|
13
|
Ramani K, Pawaria S, Maers K, Huppler AR, Gaffen SL, Biswas PS. An essential role of interleukin-17 receptor signaling in the development of autoimmune glomerulonephritis. J Leukoc Biol 2014; 96:463-72. [PMID: 24935958 DOI: 10.1189/jlb.3a0414-184r] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In recent years, proinflammatory cytokines in the nephritic kidney appear to contribute to the pathogenesis of AGN. The complex inflammatory cytokine network that drives renal pathology is poorly understood. IL-17, the signature cytokine of Th17 cells, which promotes autoimmune pathology in a variety of settings, is beginning to be identified in acute and chronic kidney diseases as well. However, the role of IL-17-mediated renal damage in the nephritic kidney has not been elucidated. Here, with the use of a murine model of experimental AGN, we showed that IL-17RA signaling is critical for the development of renal pathology. Despite normal systemic autoantibody response and glomerular immune-complex deposition, IL-17RA(-/-) mice exhibit a diminished influx of inflammatory cells and kidney-specific expression of IL-17 target genes correlating with disease resistance in AGN. IL-17 enhanced the production of proinflammatory cytokines and chemokines from tECs. Finally, we were able to show that neutralization of IL-17A ameliorated renal pathology in WT mice following AGN. These results clearly demonstrated that IL-17RA signaling significantly contributes to renal tissue injury in experimental AGN and suggest that blocking IL-17RA may be a promising therapeutic strategy for the treatment of proliferative and crescentic glomerulonephritis.
Collapse
Affiliation(s)
- Kritika Ramani
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and
| | - Sudesh Pawaria
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and
| | - Kelly Maers
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and
| | - Anna R Huppler
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and Department of Pediatrics, Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Sarah L Gaffen
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and
| | - Partha S Biswas
- Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pennsylvania, USA; and
| |
Collapse
|
14
|
Lönnberg T, Chen Z, Lahesmaa R. From a gene-centric to whole-proteome view of differentiation of T helper cell subsets. Brief Funct Genomics 2013; 12:471-82. [PMID: 24106101 PMCID: PMC3838199 DOI: 10.1093/bfgp/elt033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Proper differentiation of naïve T helper cells into functionally distinct subsets is of critical importance to human health. Consequently, the process is tightly controlled by a complex intracellular signalling network. To dissect the regulatory principles of this network, immunologists have early on embraced system-wide transcriptomics tools, leading to identification of large panels of potential regulatory factors. In contrast, the use of proteomics approaches in T helper cell research has been notably rare, and to this date relatively few high-throughput datasets have been reported. Here, we discuss the importance of such research and envision the possibilities afforded by mass spectrometry-based proteomics in the near future.
Collapse
Affiliation(s)
- Tapio Lönnberg
- European Molecular Biology Laboratory European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom.
| | | | | |
Collapse
|
15
|
Izsepi E, Himer L, Szilagyi O, Hajdu P, Panyi G, Laszlo G, Matko J. Membrane microdomain organization, calcium signal, and NFAT activation as an important axis in polarized Th cell function. Cytometry A 2012. [DOI: 10.1002/cyto.a.22234] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
16
|
Affiliation(s)
- Itay Raphael
- Department of Biology, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Thomas G Forsthuber
- Department of Biology, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA, Tel.: +1 210 458 5760, Fax: +1 210 458 5499,
| |
Collapse
|
17
|
Ikejiri A, Nagai S, Goda N, Kurebayashi Y, Osada-Oka M, Takubo K, Suda T, Koyasu S. Dynamic regulation of Th17 differentiation by oxygen concentrations. Int Immunol 2011; 24:137-46. [PMID: 22207131 DOI: 10.1093/intimm/dxr111] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Naive CD4(+) T cells are activated by antigen-presenting cells (APCs) and differentiate into distinct types of helper T (T(h)) cells in the lymph node or spleen. Oxygen (O(2)) tension is generally low in these secondary lymphoid tissues compared with the bloodstream or atmosphere. However, the effect of changes in O(2) concentration on the differentiation of T(h) cells remains unclear. Here, we established a novel model of T(h)-cell differentiation, which mimics physiological O(2) conditions. We primed naive CD4(+) T cells under 5% O(2), which has been observed in the lymph node or spleen and reoxygenated under normoxia that mimicked the O(2) concentration in blood. In this model, the differentiation of T(h)17 cells, but not T(h)1 or iTreg cells, was enhanced. Under the condition of 5% O(2), mammalian target of rapamycin complex 1 (mTORC1) was activated and led to the stabilization of hypoxia-inducible factor 1α (HIF-1α) in T(h)17 cells. The activation of mTORC1 and the acceleration of T(h)17-cell differentiation, which occurred when cells were primed under 5% O(2), were not observed in the absence of HIF-1α but were accelerated in the absence of von Hippel-Lindau tumor suppressor protein (vHL), a factor critical for HIF-1α degradation. Thus, a positive feedback loop between HIF-1α and mTORC1 induced by hypoxia followed by reoxygenation accelerates T(h)17-cell differentiation.
Collapse
Affiliation(s)
- Ai Ikejiri
- Department of Microbiology and Immunology, Keio University School of Medicine, Shinjuku-ku, Tokyo 160-8582, Japan
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Bosch X, Lozano F, Cervera R, Ramos-Casals M, Min B. Basophils, IgE, and autoantibody-mediated kidney disease. THE JOURNAL OF IMMUNOLOGY 2011; 186:6083-90. [PMID: 21597041 DOI: 10.4049/jimmunol.1002648] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Basophils are of interest in immunology due to their ability to produce a Th2-signature cytokine, IL-4, following activation. A new understanding of the role of basophils in immunity shows novel functions at a cellular level through which basophils influence adaptive immunity. This review summarizes new advances in basophil biology and discusses new roles for basophils in human disease, especially in the mediation of the pathogenesis of lupus nephritis. Recently, basophils have been shown to contribute to self-reactive Ab production in systemic lupus erythematosus and may enhance pre-existing loss of B cell tolerance, suggesting that basophils, IL-4, and IgE mediate the pathogenesis of lupus nephritis by promoting the Th2 environment and activating autoreactive B cells. In addition to envisaging exciting therapeutic prospects, these novel findings open the way for the study of basophils in other autoimmune and renal diseases.
Collapse
Affiliation(s)
- Xavier Bosch
- Department of Internal Medicine, Hospital Clinic, Institut d'Investigacions Bimoèdiques August Pi i Sunyer, University of Barcelona, 08036 Barcelona, Spain
| | | | | | | | | |
Collapse
|
19
|
Autocrine transforming growth factor-β1 promotes in vivo Th17 cell differentiation. Immunity 2011; 34:396-408. [PMID: 21435587 DOI: 10.1016/j.immuni.2011.03.005] [Citation(s) in RCA: 203] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 12/10/2010] [Accepted: 12/23/2010] [Indexed: 12/11/2022]
Abstract
TGF-β1 is a regulatory cytokine that has an important role in controlling T cell differentiation. T cell-produced TGF-β1 acts on T cells to promote Th17 cell differentiation and the development of experimental autoimmune encephalomyelitis (EAE). However, the exact TGF-β1-producing T cell subset required for Th17 cell generation and its cellular mechanism of action remain unknown. Here we showed that deletion of the Tgfb1 gene from activated T cells and Treg cells, but not Treg cells alone, abrogated Th17 cell differentiation, resulting in almost complete protection from EAE. Furthermore, differentiation of T cells both in vitro and in vivo demonstrated that TGF-β1 was highly expressed by Th17 cells and acted in a predominantly autocrine manner to maintain Th17 cells in vivo. These findings reveal an essential role for activated T cell-produced TGF-β1 in promoting the differentiation of Th17 cells and controlling inflammatory diseases.
Collapse
|
20
|
Surendar J, Mohan V, Rao MM, Babu S, Aravindhan V. Increased levels of both Th1 and Th2 cytokines in subjects with metabolic syndrome (CURES-103). Diabetes Technol Ther 2011; 13:477-82. [PMID: 21355722 DOI: 10.1089/dia.2010.0178] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Metabolic syndrome (MS) is a cluster of metabolic abnormalities associated with obesity, insulin resistance (IR), dyslipidemia, and hypertension in which inflammation plays an important role. Few studies have addressed the role played by T cell-derived cytokines in MS. The aim of the study was to look at the T-helper (Th) 1 (interleukin [IL]-12, IL-2, and interferon-γ [IFN-γ]) and Th2 (IL-4, IL-5, and IL-13) cytokines in MS in the high-risk Asian Indian population. RESEARCH DESIGN AND METHODS Study subjects were recruited from the Chennai Urban Rural Epidemiology Study. MS was defined using National Cholesterol Education Program-Adult Treatment Panel III criteria modified for waist according to World Health Organization Asia Pacific guidelines. Serum cytokine profile was determined by multiplex cytokine assay in subjects with (n = 21) and without (n = 33) MS. RESULTS Both Th1 and Th2 cytokines showed up-regulation in MS. IL-12 (5.40 pg/mL in MS vs. 3.24 pg/mL in non-MS; P < 0.01), IFN-γ (6.8 pg/mL in MS vs. 4.7 pg/mL in non-MS; P < 0.05), IL-4 (0.61 pg/mL in MS vs. 0.34 pg/mL in non-MS; P < 0.001), IL-5 (4.39 pg/mL in MS vs. 2.36 pg/mL in non-MS; P < 0.001), and IL-13 (3.42 pg in MS vs. 2.72 pg/mL in non-MS; P < 0.01) were significantly increased in subjects with MS compared with those without. Both Th1 and Th2 cytokines showed a significant association with fasting plasma glucose level even after adjusting for age and gender. The Th1 and Th2 cytokines also showed a negative association with adiponectin and a positive association with the homeostasis model of assessment of IR and high-sensitivity C-reactive protein. CONCLUSIONS Apart from pro-inflammatory cytokines, Th cytokines might play an important role in inflammation, IR, and MS.
Collapse
|
21
|
Abstract
Measuring cytokine production is an integral part of measuring immune response during immunotherapy. Current technologies allow the simultaneous quantification of multiple cytokines in a variety of tissues. Patterns of cytokine response can be referred to as cytokine profiles. This article discusses the experimental design and data analysis of a number of studies that examined cytokine profiles in humans. We highlight potential sources of variability, both due to assay nuances and the diversity of human populations. We present strategies for analyzing data, emphasizing both multidimensional analysis and the value of treating each donor as his or her own control.
Collapse
Affiliation(s)
- Janet C Siebert
- Robert W Franz Cancer Research Center, Earle A Chiles Research Institute, Providence Cancer Center, Portland, OR 97213, USA.
| | | |
Collapse
|
22
|
|
23
|
Food allergy – science and policy needs – The UK Food Standards Agency Research Programme. Toxicology 2010; 278:319-25. [DOI: 10.1016/j.tox.2010.08.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 08/13/2010] [Accepted: 08/14/2010] [Indexed: 11/23/2022]
|
24
|
Kimber I, Basketter DA, Gerberick GF, Ryan CA, Dearman RJ. Chemical allergy: translating biology into hazard characterization. Toxicol Sci 2010; 120 Suppl 1:S238-68. [PMID: 21097995 DOI: 10.1093/toxsci/kfq346] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The induction by chemicals of allergic sensitization and allergic disease is an important and challenging branch of toxicology. Skin sensitization resulting in allergic contact dermatitis represents the most common manifestation of immunotoxicity in humans, and many hundreds of chemicals have been implicated as skin sensitizers. There are far fewer chemicals that have been shown to cause sensitization of the respiratory tract and asthma, but the issue is no less important because hazard identification remains a significant challenge, and occupational asthma can be fatal. In all areas of chemical allergy, there have been, and remain still, intriguing challenges where progress has required a close and productive alignment between immunology, toxicology, and clinical medicine. What the authors have sought to do here is to exemplify, within the framework of chemical allergy, how an investment in fundamental research and an improved understanding of relevant biological and biochemical mechanisms can pay important dividends in driving new innovations in hazard identification, hazard characterization, and risk assessment. Here we will consider in turn three specific areas of research in chemical allergy: (1) the role of epidermal Langerhans cells in the development of skin sensitization, (2) T lymphocytes and skin sensitization, and (3) sensitization of the respiratory tract. In each area, the aim is to identify what has been achieved and how that progress has impacted on the development of new approaches to toxicological evaluation. Success has been patchy, and there is still much to be achieved, but the journey has been fascinating and there have been some very important developments. The conclusion drawn is that continued investment in research, if coupled with an appetite for translating the fruits of that research into imaginative new tools for toxicology, should continue to better equip us for tackling the important challenges that remain to be addressed.
Collapse
Affiliation(s)
- Ian Kimber
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK.
| | | | | | | | | |
Collapse
|
25
|
Hänninen A, Soilu-Hänninen M, Hampe CS, Deptula A, Geubtner K, Ilonen J, Knip M, Reijonen H. Characterization of CD4+ T cells specific for glutamic acid decarboxylase (GAD65) and proinsulin in a patient with stiff-person syndrome but without type 1 diabetes. Diabetes Metab Res Rev 2010; 26:271-9. [PMID: 20503259 PMCID: PMC2878280 DOI: 10.1002/dmrr.1083] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Glutamic acid decarboxylase (GAD) is a rate-limiting enzyme in the synthesis of gamma-amino butyric acid (GABA) and an important autoantigen both in patients with type 1 diabetes (T1D) and stiff-person syndrome (SPS). Autoantibodies (GADA) to the 65-kDa isoform of GAD are a characteristic feature in both diseases. Approximately 30% of patients with SPS develop diabetes, yet, it is unclear to which extent co-existing autoimmunity to GAD65 and other islet autoantigens determines the risk of developing T1D. METHODS In this study, we monitored CD4+ T-cell responses to GAD65 and proinsulin in a patient with SPS who remained normoglycaemic during the 46-month follow-up. RESULTS Fluctuating but persistent T-cell reactivity to GAD65 was identified, as well as T-cell reactivity to proinsulin at one time point. The majority of the T-cell clones isolated from the patient with SPS produced high levels of Th2 cytokines (IL-13, IL-5 and IL-4). We also examined levels of GADA, insulin and IA-2 autoantibodies, and epitope specificity of GADA. In both serum and cerebrospinal fluid (CSF), GADA levels were high, and GADA persisted throughout the follow-up. Despite T-cell reactivity to both GAD65 and proinsulin, autoantibodies to other islet autoantigens did not develop. CONCLUSIONS Further follow-up will determine whether the beta-cell autoimmunity observed in this patient will eventually lead to T1D.
Collapse
Affiliation(s)
- Arno Hänninen
- Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
|