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Wang Y, Zou Y, Jiang Q, Li W, Chai X, Zhao T, Liu S, Yuan Z, Yu C, Wang T. Ox-LDL-induced CD80 + macrophages expand pro-atherosclerotic NKT cells via CD1d in atherosclerotic mice and hyperlipidemic patients. Am J Physiol Cell Physiol 2024; 326:C1563-C1572. [PMID: 38586879 DOI: 10.1152/ajpcell.00043.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/21/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
Atherosclerosis is an inflammatory disease of blood vessels involving the immune system. Natural killer T (NKT) cells, as crucial components of the innate and acquired immune systems, play critical roles in the development of atherosclerosis. However, the mechanism and clinical relevance of NKT cells in early atherosclerosis are largely unclear. The study investigated the mechanism influencing NKT cell function in apoE deficiency-induced early atherosclerosis. Our findings demonstrated that there were higher populations of NKT cells and interferon-gamma (IFN-γ)-producing NKT cells in the peripheral blood of patients with hyperlipidemia and in the aorta, blood, spleen, and bone marrow of early atherosclerotic mice compared with the control groups. Moreover, we discovered that the infiltration of CD80+ macrophages and CD1d expression on CD80+ macrophages in atherosclerotic mice climbed remarkably. CD1d expression increased in CD80+ macrophages stimulated by oxidized low-density lipoprotein (ox-LDL) ex vivo and in vitro. Ex vivo coculture of macrophages with NKT cells revealed that ox-LDL-induced CD80+ macrophages presented lipid antigen α-Galcer (alpha-galactosylceramide) to NKT cells via CD1d, enabling NKT cells to express more IFN-γ. Furthermore, a greater proportion of CD1d+ monocytes and CD1d+CD80+ monocytes were found in peripheral blood of hyperlipidemic patients compared with that of healthy donors. Positive correlations were found between CD1d+CD80+ monocytes and NKT cells or IFN-γ+ NKT cells in hyperlipidemic patients. Our findings illustrated that CD80+ macrophages stimulated NKT cells to secrete IFN-γ via CD1d-presenting α-Galcer, which may accelerate the progression of early atherosclerosis. Inhibiting lipid antigen presentation by CD80+ macrophages to NKT cells may be a promising immune target for the treatment of early atherosclerosis.NEW & NOTEWORTHY This work proposed the ox-LDL-CD80+ monocyte/macrophage-CD1d-NKT cell-IFN-γ axis in the progression of atherosclerosis. The proinflammatory IFN-γ+ NKT cells are closely related to CD1d+CD80+ monocytes in hyperlipidemic patients. Inhibiting CD80+ macrophages to present lipid antigens to NKT cells through CD1d blocking may be a new therapeutic target for atherosclerosis.
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Affiliation(s)
- Yin Wang
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
| | - Yao Zou
- Department of Pharmacy, People's Hospital of Chongqing Liangjiang New District, Chongqing, People's Republic of China
| | - Qingsong Jiang
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing, People's Republic of China
| | - Wenming Li
- Department of Clinical Laboratory, University-Town Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Xinyu Chai
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
| | - Tingrui Zhao
- Department of Clinical Pharmacy, The Third Hospital of Mianyang, Sichuan Mental Health Center, Sichuan, People's Republic of China
| | - Siyi Liu
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
| | - Zhiyi Yuan
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
| | - Chao Yu
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
| | - Tingting Wang
- College of Pharmacy, Chongqing Medical University, Chongqing, People's Republic of China
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing, People's Republic of China
- Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, Chongqing, People's Republic of China
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2
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Hu C, Liao S, Lv L, Li C, Mei Z. Intestinal Immune Imbalance is an Alarm in the Development of IBD. Mediators Inflamm 2023; 2023:1073984. [PMID: 37554552 PMCID: PMC10406561 DOI: 10.1155/2023/1073984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 07/06/2023] [Accepted: 07/08/2023] [Indexed: 08/10/2023] Open
Abstract
Immune regulation plays a crucial role in human health and disease. Inflammatory bowel disease (IBD) is a chronic relapse bowel disease with an increasing incidence worldwide. Clinical treatments for IBD are limited and inefficient. However, the pathogenesis of immune-mediated IBD remains unclear. This review describes the activation of innate and adaptive immune functions by intestinal immune cells to regulate intestinal immune balance and maintain intestinal mucosal integrity. Changes in susceptible genes, autophagy, energy metabolism, and other factors interact in a complex manner with the immune system, eventually leading to intestinal immune imbalance and the onset of IBD. These events indicate that intestinal immune imbalance is an alarm for IBD development, further opening new possibilities for the unprecedented development of immunotherapy for IBD.
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Affiliation(s)
- Chunli Hu
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Shengtao Liao
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Lin Lv
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Chuanfei Li
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Zhechuan Mei
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
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3
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Bharadwaj NS, Gumperz JE. Harnessing invariant natural killer T cells to control pathological inflammation. Front Immunol 2022; 13:998378. [PMID: 36189224 PMCID: PMC9519390 DOI: 10.3389/fimmu.2022.998378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
Invariant natural killer T (iNKT) cells are innate T cells that are recognized for their potent immune modulatory functions. Over the last three decades, research in murine models and human observational studies have revealed that iNKT cells can act to limit inflammatory pathology in a variety of settings. Since iNKT cells are multi-functional and can promote inflammation in some contexts, understanding the mechanistic basis for their anti-inflammatory effects is critical for effectively harnessing them for clinical use. Two contrasting mechanisms have emerged to explain the anti-inflammatory activity of iNKT cells: that they drive suppressive pathways mediated by other regulatory cells, and that they may cytolytically eliminate antigen presenting cells that promote excessive inflammatory responses. How these activities are controlled and separated from their pro-inflammatory functions remains a central question. Murine iNKT cells can be divided into four functional lineages that have either pro-inflammatory (NKT1, NKT17) or anti-inflammatory (NKT2, NKT10) cytokine profiles. However, in humans these subsets are not clearly evident, and instead most iNKT cells that are CD4+ appear oriented towards polyfunctional (TH0) cytokine production, while CD4- iNKT cells appear more predisposed towards cytolytic activity. Additionally, structurally distinct antigens have been shown to induce TH1- or TH2-biased responses by iNKT cells in murine models, but human iNKT cells may respond to differing levels of TCR stimulation in a way that does not neatly separate TH1 and TH2 cytokine production. We discuss the implications of these differences for translational efforts focused on the anti-inflammatory activity of iNKT cells.
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Affiliation(s)
- Nikhila S Bharadwaj
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Jenny E Gumperz
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
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4
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Natural Killer T (NKT) Cells and Periodontitis: Potential Regulatory Role of NKT10 Cells. Mediators Inflamm 2021; 2021:5573937. [PMID: 34594157 PMCID: PMC8478603 DOI: 10.1155/2021/5573937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/24/2021] [Indexed: 12/03/2022] Open
Abstract
Natural killer T (NKT) cells constitute a unique subset of T lymphocytes characterized by specifically interacting with antigenic glycolipids conjugated to the CD1d receptor on antigen-presenting cells. Functionally, NKT cells are capable of performing either effector or suppressor immune responses, depending on their production of proinflammatory or anti-inflammatory cytokines, respectively. Effector NKT cells are subdivided into three subsets, termed NKT1, NKT2, and NKT17, based on the cytokines they produce and their similarity to the cytokine profile produced by Th1, Th2, and Th17 lymphocytes, respectively. Recently, a new subgroup of NKT cells termed NKT10 has been described, which cooperates and interacts with other immune cells to promote immunoregulatory responses. Although the tissue-specific functions of NKT cells have not been fully elucidated, their activity has been associated with the pathogenesis of different inflammatory diseases with immunopathogenic similarities to periodontitis, including osteolytic pathologies such as rheumatoid arthritis and osteoporosis. In the present review, we revise and discuss the pathogenic characteristics of NKT cells in these diseases and their role in the pathogenesis of periodontitis; particularly, we analyze the potential regulatory role of the IL-10-producing NKT10 cells.
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5
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Hils M, Wölbing F, Hilger C, Fischer J, Hoffard N, Biedermann T. The History of Carbohydrates in Type I Allergy. Front Immunol 2020; 11:586924. [PMID: 33163001 PMCID: PMC7583601 DOI: 10.3389/fimmu.2020.586924] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022] Open
Abstract
Although first described decades ago, the relevance of carbohydrate specific antibodies as mediators of type I allergy had not been recognized until recently. Previously, allergen specific IgE antibodies binding to carbohydrate epitopes were considered to demonstrate a clinically irrelevant cross-reactivity. However, this changed following the discovery of type I allergies specifically mediated by oligosaccharide structures. Especially the emerging understanding of red meat allergy characterized by IgE directed to the oligosaccharide alpha-gal showed that carbohydrate-mediated reactions can result in life threatening systemic anaphylaxis which in contrast to former assumptions proves a high clinical relevance of some carbohydrate allergens. Within the scope of this review article, we illustrate the historical development of carbohydrate-allergen-research, reaching from only diagnostically relevant crossreactive-carbohydrate-determinants to clinically important antigens mediating type I allergy. Focusing on clinical and immunological features of the alpha-gal syndrome, we highlight the discovery of oligosaccharides as potentially highly immunogenic antigens and mediators of type I allergy, report what is known about the route of sensitization and the immunological mechanisms involved in sensitization and elicitation phase of allergic responses as well as currently available diagnostic and therapeutic tools. Finally, we briefly report on carbohydrates being involved in type I allergies different from alpha-gal.
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Affiliation(s)
- Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Christiane Hilger
- Department of Infection and Immunity, Luxembourg Institute of Health (LIH), Esch-sur-Alzette, Luxembourg
| | - Jörg Fischer
- Department of Dermatology, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Nils Hoffard
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany.,Clinical Unit Allergology, Helmholtz Zentrum München, German Research Center for Environmental 10 Health GmbH, Neuherberg, Germany
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6
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Abstract
Personalized cancer vaccines (PCVs) are reinvigorating vaccine strategies in cancer immunotherapy. In contrast to adoptive T-cell therapy and checkpoint blockade, the PCV strategy modulates the innate and adaptive immune systems with broader activation to redeploy antitumor immunity with individualized tumor-specific antigens (neoantigens). Following a sequential scheme of tumor biopsy, mutation analysis, and epitope prediction, the administration of neoantigens with synthetic long peptide (SLP) or mRNA formulations dramatically improves the population and activity of antigen-specific CD4+ and CD8+ T cells. Despite the promising prospect of PCVs, there is still great potential for optimizing prevaccination procedures and vaccine potency. In particular, the arduous development of tumor-associated antigen (TAA)-based vaccines provides valuable experience and rational principles for augmenting vaccine potency which is expected to advance PCV through the design of adjuvants, delivery systems, and immunosuppressive tumor microenvironment (TME) reversion since current personalized vaccination simply admixes antigens with adjuvants. Considering the broader application of TAA-based vaccine design, these two strategies complement each other and can lead to both personalized and universal therapeutic methods. Chemical strategies provide vast opportunities for (1) exploring novel adjuvants, including synthetic molecules and materials with optimizable activity, (2) constructing efficient and precise delivery systems to avoid systemic diffusion, improve biosafety, target secondary lymphoid organs, and enhance antigen presentation, and (3) combining bioengineering methods to innovate improvements in conventional vaccination, "smartly" re-educate the TME, and modulate antitumor immunity. As chemical strategies have proven versatility, reliability, and universality in the design of T cell- and B cell-based antitumor vaccines, the union of such numerous chemical methods in vaccine construction is expected to provide new vigor and vitality in cancer treatment.
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Affiliation(s)
- Wen-Hao Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Yan-Mei Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China.,Beijing Institute for Brain Disorders, 100069 Beijing, China.,Center for Synthetic and Systems Biology, Tsinghua University, 100084 Beijing, China
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7
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Hassane M, Jouan Y, Creusat F, Soulard D, Boisseau C, Gonzalez L, Patin EC, Heuzé-Vourc'h N, Sirard JC, Faveeuw C, Trottein F, Si-Tahar M, Baranek T, Paget C. Interleukin-7 protects against bacterial respiratory infection by promoting IL-17A-producing innate T-cell response. Mucosal Immunol 2020; 13:128-139. [PMID: 31628425 DOI: 10.1038/s41385-019-0212-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 09/24/2019] [Accepted: 09/28/2019] [Indexed: 02/07/2023]
Abstract
Interleukin-7 (IL-7) is a critical cytokine in B- and T-lymphocyte development and maturation. Recent evidence suggests that IL-7 is a preferential homeostatic and survival factor for RORγt+ innate T cells such as natural killer T (NKT) cells, γδT cells, and mucosal-associated invariant T (MAIT) cells in the periphery. Given the important contribution of these populations in antibacterial immunity at barrier sites, we questioned whether IL-7 could be instrumental in boosting the local host immune response against respiratory bacterial infection. By using a cytokine-monoclonal antibody approach, we illustrated a role for topical IL-7 delivery in increasing the pool of RORγt+ IL-17A-producing innate T cells. Prophylactic IL-7 treatment prior to Streptococcus pneumoniae infection led to better bacterial containment, a process associated with increased neutrophilia and that depended on γδT cells and IL-17A. Last, combined delivery of IL-7 and α-galactosylceramide (α-GalCer), a potent agonist for invariant NKT (iNKT) cells, conferred an almost total protection in terms of survival, an effect associated with enhanced IL-17 production by innate T cells and neutrophilia. Collectively, we provide a proof of concept that IL-7 enables fine-tuning of innate T- cell functions. This might pave the way for considering IL-7 as an innovative biotherapeutic against bacterial infection.
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Affiliation(s)
- Maya Hassane
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - Youenn Jouan
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France.,Service de Médecine Intensive et Réanimation, Centre Hospitalier Régional Universitaire, Tours, France
| | - Florent Creusat
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Daphnée Soulard
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - Chloé Boisseau
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Loïc Gonzalez
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Emmanuel C Patin
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - Nathalie Heuzé-Vourc'h
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Jean-Claude Sirard
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - Christelle Faveeuw
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - François Trottein
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France
| | - Mustapha Si-Tahar
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Thomas Baranek
- INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France.,Université de Tours, Faculté de Médecine de Tours, Tours, France
| | - Christophe Paget
- Centre d'Infection et d'Immunité de Lille, Inserm U1019, CNRS UMR 8204, University of Lille, CHU Lille- Institut Pasteur de Lille, 59000, Lille, France. .,INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR, 1100, Tours, France. .,Université de Tours, Faculté de Médecine de Tours, Tours, France.
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8
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Trittel S, Vashist N, Ebensen T, Chambers BJ, Guzmán CA, Riese P. Invariant NKT Cell-Mediated Modulation of ILC1s as a Tool for Mucosal Immune Intervention. Front Immunol 2019; 10:1849. [PMID: 31440243 PMCID: PMC6692890 DOI: 10.3389/fimmu.2019.01849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 07/23/2019] [Indexed: 11/18/2022] Open
Abstract
Non-NK group 1 innate lymphoid cells (ILC1s), mainly investigated in the mucosal areas of the intestine, are well-known to contribute to anti-parasitic and anti-bacterial immune responses. Recently, our group revealed that lung ILC1s become activated during murine influenza infection, thereby contributing to viral clearance. In this context, worldwide seasonal influenza infections often result in severe disease outbreaks leading to high morbidity and mortality. Therefore, new immune interventions are urgently needed. In contrast to NK cells, the potential of non-NK ILC1s to become functionally tailored by immune modulators to contribute to the combat against mucosal-transmitted viral pathogens has not yet been addressed. The present study aimed at assessing the potential of ILC1s to become modulated by iNKT cells activated through the CD1d agonist αGalCerMPEG. Our results demonstrate an improved functional responsiveness of murine lung and splenic ILC1s following iNKT cell stimulation by the mucosal route, as demonstrated by enhanced surface expression of TNF-related apoptosis-inducing ligand (TRAIL), CD49a and CD28, and increased secretion of IFNγ. Interestingly, iNKT cell stimulation also induced the expression of the immune checkpoint molecules GITR and CTLA-4, which represent crucial points of action for immune regulation. An in vivo influenza infection model revealed that intranasal activation of ILC1s by αGalCerMPEG contributed to increased viral clearance as shown by reduced viral loads in the lungs. The findings that ILC1s can become modulated by mucosally activated iNKT cells in a beneficial manner emphasize their up to now underestimated potential and renders them to be considered as targets for novel immune interventions.
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Affiliation(s)
- Stephanie Trittel
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Neha Vashist
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany.,Department of Medicine, Center for Infectious Medicine, Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Thomas Ebensen
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Benedict J Chambers
- Department of Medicine, Center for Infectious Medicine, Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Carlos A Guzmán
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Peggy Riese
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany
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9
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Hu L, Zhao C, Ma J, Jing Y, Du Y. Design, synthesis, and evaluation of α-galactopyranosylceramide mimics promoting Th2 cytokines production. Bioorg Med Chem Lett 2019; 29:1357-1362. [DOI: 10.1016/j.bmcl.2019.03.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 03/19/2019] [Accepted: 03/26/2019] [Indexed: 01/30/2023]
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10
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Krijgsman D, Hokland M, Kuppen PJK. The Role of Natural Killer T Cells in Cancer-A Phenotypical and Functional Approach. Front Immunol 2018. [PMID: 29535734 PMCID: PMC5835336 DOI: 10.3389/fimmu.2018.00367] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Natural killer T (NKT) cells are a subset of CD1d-restricted T cells at the interface between the innate and adaptive immune system. NKT cells can be subdivided into functional subsets that respond rapidly to a wide variety of glycolipids and stress-related proteins using T- or natural killer (NK) cell-like effector mechanisms. Because of their major modulating effects on immune responses via secretion of cytokines, NKT cells are also considered important players in tumor immunosurveillance. During early tumor development, T helper (TH)1-like NKT cell subsets have the potential to rapidly stimulate tumor-specific T cells and effector NK cells that can eliminate tumor cells. In case of tumor progression, NKT cells may become overstimulated and anergic leading to deletion of a part of the NKT cell population in patients via activation-induced cell death. In addition, the remaining NKT cells become hyporesponsive, or switch to immunosuppressive TH2-/T regulatory-like NKT cell subsets, thereby facilitating tumor progression and immune escape. In this review, we discuss this important role of NKT cells in tumor development and we conclude that there should be three important focuses of future research in cancer patients in relation with NKT cells: (1) expansion of the NKT cell population, (2) prevention and breaking of NKT cell anergy, and (3) skewing of NKT cells toward TH1-like subsets with antitumor activity.
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Affiliation(s)
- Daniëlle Krijgsman
- Department of Surgery, Leiden University Medical Center, Leiden, Netherlands.,Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Peter J K Kuppen
- Department of Surgery, Leiden University Medical Center, Leiden, Netherlands
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11
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Bojarska-Junak A, Waldowska M, Woś J, Chocholska S, Hus I, Tomczak W, Dzik M, Hus M, Roliński J. Intracellular IL-4 and IFN-γ expression in iNKT cells from patients with chronic lymphocytic leukemia. Oncol Lett 2018; 15:1580-1590. [PMID: 29434853 PMCID: PMC5776947 DOI: 10.3892/ol.2017.7484] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 06/23/2017] [Indexed: 01/09/2023] Open
Abstract
Malignant B cells in chronic lymphocytic leukemia serve an essential role in the whole immune response, so their interactions with other immune cells are more complex than observed in solid tumors. The latest study results indicate that the immune dysregulation in chronic lymphocytic leukemia (CLL) also affects a small population of invariant natural killer T cells (iNKT). Using peripheral blood iNKT cells obtained from patients with CLL, the objective of the present study was to assess the intracellular expression of typical cytokines involved in the Th1 (IFN-γ) and Th2 (IL-4) response pathways following stimulation with the iNKT-specific ligand α-galactosylceramide. iNKT cells from patients with CLL exhibited upregulated IL-4 and IFN-γ expression in comparison to those from HVs. No significant association between the ability of iNKT cells to produce IL-4 or IFN-γ and the expression of CD1d on leukemic B lymphocytes or monocytes was identified. However, the function of iNKT cells was compromised in patients with CLL by a strong Th2 bias (high IL-4 and low IFN-γ expression). The ratio of iNKT+IFN-γ+:iNKT+IL-4+ was significantly decreased in the CLL group when compared with HVs, and this decreased further as the disease progressed. This change may result in the promotion of leukemic B lymphocyte survival. Therefore, in the pathogenesis of CLL, Th2 bias may delay the antitumor response that relies on stimulation of the Th1 immune response.
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Affiliation(s)
| | - Małgorzata Waldowska
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Justyna Woś
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Sylwia Chocholska
- Department of Haematooncology and Bone Marrow Transplantation, Medical University of Lublin, 20-093 Lublin, Poland
| | - Iwona Hus
- Department of Clinical Transplantology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Waldemar Tomczak
- Department of Haematooncology and Bone Marrow Transplantation, Medical University of Lublin, 20-093 Lublin, Poland
| | - Michał Dzik
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Marek Hus
- Department of Haematooncology and Bone Marrow Transplantation, Medical University of Lublin, 20-093 Lublin, Poland
| | - Jacek Roliński
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland
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12
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Grabarz F, Aguiar CF, Correa-Costa M, Braga TT, Hyane MI, Andrade-Oliveira V, Landgraf MA, Câmara NOS. Protective role of NKT cells and macrophage M2-driven phenotype in bleomycin-induced pulmonary fibrosis. Inflammopharmacology 2017; 26:491-504. [PMID: 28779430 DOI: 10.1007/s10787-017-0383-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 07/26/2017] [Indexed: 12/13/2022]
Abstract
Pulmonary fibrosis is a result of an abnormal wound healing in lung tissue triggered by an excessive accumulation of extracellular matrix proteins, loss of tissue elasticity, and debit of ventilatory function. NKT cells are a major source of Th1 and Th2 cytokines and may be crucial in the polarization of M1/M2 macrophages in pulmonary fibrogenesis. Although there appears to be constant scientific progress in that field, pulmonary fibrosis still exhibits no current cure. From these facts, we hypothesized that NKT cells could influence the development of pulmonary fibrosis via modulation of macrophage activation. Wild type (WT) and NKT type I cell-deficient mice (Jα18-/-) were subjected to the protocol of bleomycin-induced pulmonary fibrosis with or without treatment with NKT cell agonists α-galactosylceramide and sulfatide. The participation of different cell populations, collagen deposition, and protein levels of different cytokines involved in inflammation and fibrosis was evaluated. The results indicate a benign role of NKT cells in Jα18-/- mice and in wild-type α-galactosylceramide-sulfatide-treated groups. These animals presented lower levels of collagen deposition, fibrogenic molecules such as TGF-β and vimentin and improved survival rates. In contrast, WT mice developed a Th2-driven response augmenting IL-4, 5, and 13 protein synthesis and increased collagen deposition. Furthermore, the arginase-1 metabolic pathway was downregulated in wild-type NKT-activated and knockout mice indicating lower activity of M2 macrophages in lung tissue. Hence, our data suggest that NKT cells play a protective role in this experimental model by down modulating the Th2 milieu, inhibiting M2 polarization and finally preventing fibrosis.
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Affiliation(s)
- Felipe Grabarz
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Cristhiane Favero Aguiar
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Matheus Correa-Costa
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Tárcio Teodoro Braga
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Meire I Hyane
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Vinícius Andrade-Oliveira
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil
| | - Maristella Almeida Landgraf
- Laboratory of Hypertension, Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Niels Olsen Saraiva Câmara
- Laboratory of Transplantation Immunobiology, Immunology Department, University of São Paulo, São Paulo, Brazil. .,Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo, Brazil. .,Institute of Biomedical Sciences IV, University of São Paulo, Av. Prof. Lineu Prestes, 1730, São Paulo, SP, 05508-000, Brazil.
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13
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Speir M, Hermans IF, Weinkove R. Engaging Natural Killer T Cells as 'Universal Helpers' for Vaccination. Drugs 2017; 77:1-15. [PMID: 28005229 DOI: 10.1007/s40265-016-0675-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Conventional vaccine adjuvants enhance peptide-specific T-cell and B-cell responses by modifying peptide stability or uptake or by binding to pattern-recognition receptors on antigen-presenting cells (APCs). This article discusses the application of a distinct mechanism of adjuvant activity: the activation of type I, or invariant, natural killer T (iNKT) cells to drive cellular and humoral immune responses. Using a semi-invariant T-cell receptor (TCR), iNKT cells recognize glycolipid antigens presented on cluster of differentiation (CD)-1d molecules. When their ligands are presented in concert with peptides, iNKT cells can provide T-cell help, 'licensing' APCs to augment peptide-specific T-cell and antibody responses. We discuss the potential benefits and limitations of exploiting iNKT cells as 'universal helpers' to enhance vaccine responses for the treatment and prevention of cancer and infectious diseases.
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Affiliation(s)
- Mary Speir
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
| | - Ian F Hermans
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand. .,School of Biological Sciences, Victoria University Wellington, PO Box 600, Wellington, 6140, New Zealand. .,Maurice Wilkins Centre, Private Bag 92019, Auckland, New Zealand.
| | - Robert Weinkove
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand. .,Wellington Blood and Cancer Centre, Wellington Hospital, Private Bag 7902, Wellington, 6242, New Zealand. .,Department of Pathology and Molecular Medicine, University of Otago Wellington, Wellington, 6021, New Zealand.
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14
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Invariant natural killer T cells: front line fighters in the war against pathogenic microbes. Immunogenetics 2016; 68:639-48. [PMID: 27368411 DOI: 10.1007/s00251-016-0933-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 04/21/2016] [Indexed: 12/22/2022]
Abstract
Invariant natural killer T (iNKT) cells constitute a unique subset of innate-like T cells that have been shown to have crucial roles in a variety of immune responses. iNKT cells are characterized by their expression of both NK cell markers and an invariant T cell receptor (TCR) α chain, which recognizes glycolipids presented by the MHC class I-like molecule CD1d. Despite having a limited antigen repertoire, the iNKT cell response can be very complex, and participate in both protective and harmful immune responses. The protective role of these cells against a variety of pathogens has been particularly well documented. Through the use of these pathogen models, our knowledge of the breadth of the iNKT cell response has been expanded. Specific iNKT cell antigens have been isolated from several different bacteria, from which iNKT cells are critical for protection in mouse models. These responses can be generated by direct, CD1d-mediated activation, or indirect, cytokine-mediated activation, or a combination of the two. This can lead to secretion of a variety of different Th1, Th2, or Th17 cytokines, which differentially impact the downstream immune response against these pathogens. This critical role is emphasized by the conservation of these cells between mice and humans, warranting further investigation into how iNKT cells participate in protective immune responses, with the ultimate goal of harnessing their potential for treatment.
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15
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Sun L, Middleton DR, Wantuch PL, Ozdilek A, Avci FY. Carbohydrates as T-cell antigens with implications in health and disease. Glycobiology 2016; 26:1029-1040. [PMID: 27236197 DOI: 10.1093/glycob/cww062] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 05/11/2016] [Accepted: 05/23/2016] [Indexed: 12/27/2022] Open
Abstract
Glycosylation is arguably the most ubiquitous post-translational modification on proteins in microbial and mammalian cells. During the past few years, there has been intensive research demonstrating that carbohydrates, either in pure forms or in conjunction with proteins or lipids, evoke and modulate adaptive immune responses. We now know that carbohydrates can be directly recognized by T cells or participate in T-cell stimulation as components of T-cell epitopes. T-cell recognition of carbohydrate antigens takes place via their presentation by major histocompatibility complex pathways on antigen-presenting cells. In this review, we summarize studies on carbohydrates as T-cell antigens modulating adaptive immune responses. Through discussion of glycan-containing antigens, such as glycoproteins, glycolipids, zwitterionic polysaccharides and carbohydrate-based glycoconjugate vaccines, we will illustrate the key molecular and cellular interactions between carbohydrate antigens and T cells and the implications of these interactions in health and disease.
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Affiliation(s)
- Lina Sun
- Department of Biochemistry and Molecular Biology, Center for Molecular Medicine, and Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Dustin R Middleton
- Department of Biochemistry and Molecular Biology, Center for Molecular Medicine, and Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Paeton L Wantuch
- Department of Biochemistry and Molecular Biology, Center for Molecular Medicine, and Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Ahmet Ozdilek
- Department of Biochemistry and Molecular Biology, Center for Molecular Medicine, and Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Fikri Y Avci
- Department of Biochemistry and Molecular Biology, Center for Molecular Medicine, and Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
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16
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Fichtner AS, Paletta D, Starick L, Schumann RF, Niewiesk S, Herrmann T. Function and expression of CD1d and invariant natural killer T-cell receptor in the cotton rat (Sigmodon hispidus). Immunology 2015; 146:618-29. [PMID: 26346465 DOI: 10.1111/imm.12532] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 08/12/2015] [Accepted: 09/02/2015] [Indexed: 12/16/2022] Open
Abstract
The cotton rat (Sigmodon hispidus) belongs to the rodent family of Cricetidae and provides a powerful model to study the pathogenesis of human respiratory viruses and measles virus. Recent studies in other rodent models have suggested a role for invariant natural killer T (iNKT) cells in antiviral immunity and vaccination against respiratory virus infections. Using new experimental tools, we provide the first evidence for a functional CD1d cell molecule (crCD1d) and iNKT T-cell receptor in cotton rats. The crCD1d cDNA sequence was identified and crCD1d transductants showed that monoclonal antibody WTH-2 stains crCD1d as efficiently as mouse or rat CD1d. The expression of crCD1d was clearly weaker for thymocytes and B cells, and higher for T cells, which is different to what is found in murine species. The antigen-presenting capacity of crCD1d was demonstrated with crCD1d-immunoglobulin dimers loaded with the glycolipid PBS57, which bound iNKT T-cell receptors. Evidence for functional cotton rat iNKT cells was provided by detection of interferon-γ and interleukin-4 in cultures of splenocytes stimulated with PBS57 and α-galactosylceramide and by specific staining of about 0·2% of splenocytes with PBS57-loaded crCD1d dimers. Canonical AV14/AJ18 rearrangements were identified and found to contain multiple members of the AV14 (AV11) family. One of them was expressed and found to bind CD1d dimers. In summary, these data provide the first evidence for functional CD1d molecules and iNKT T-cell receptors in cotton rats and provide the tools to analyse them both in the cotton rat model of infectious diseases.
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Affiliation(s)
| | - Daniel Paletta
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Lisa Starick
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | | | - Stefan Niewiesk
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Thomas Herrmann
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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17
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Bi J, Wang J, Zhou K, Wang Y, Fang M, Du Y. Synthesis and Biological Activities of 5-Thio-α-GalCers. ACS Med Chem Lett 2015; 6:476-80. [PMID: 25941558 DOI: 10.1021/acsmedchemlett.5b00046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/11/2015] [Indexed: 01/22/2023] Open
Abstract
NKT cells, a unique subset of T cells that recognizes glycolipid antigens presented by CD1d molecules, are believed to produce key cytokines of both Th1 and Th2 T cells and are thus involved in the control of several types of immune response. As an active glycolipid antigen having α-galactosyl ceramide core structure, KRN7000 showed promising immunostimulation activity and was selected as an anticancer drug candidate for further clinical application. In this report, three new KRN7000 structural analogues were designed and synthesized, in which the ring oxygen of the galactopyranose residue is replaced by a sulfur atom along with the variation on the lipid chain. Their abilities for stimulating mouse NKT cells to produce IFN-γ and IL-4 were evaluated both in vivo and in vitro.
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Affiliation(s)
- Jingjing Bi
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- National
Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Jing Wang
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Kai Zhou
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuancheng Wang
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Min Fang
- CAS
Key Laboratory of Pathogenic Microbiology and Immunology, Institute
of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuguo Du
- State
Key Laboratory of Environmental Chemistry and Eco-toxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- National
Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
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18
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Berzins SP, Ritchie DS. Natural killer T cells: drivers or passengers in preventing human disease? Nat Rev Immunol 2014; 14:640-6. [PMID: 25103356 DOI: 10.1038/nri3725] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Natural killer T (NKT) cells are credited with regulatory roles in immunity against cancers, autoimmune diseases, allergies, and bacterial and viral infections. Studies in mice and observational research in patient groups have suggested that NKT cell-based therapies could be used to prevent or treat these diseases, yet the translation into clinical settings has been disappointing. We support the view that NKT cells have regulatory characteristics that could be exploited in clinical settings, but there are doubts about the natural roles of NKT cells in vivo and whether NKT cell defects are fundamental drivers of disease in humans. In this Opinion article, we discuss the uncertainties and opportunities regarding NKT cells in humans, and the potential for NKT cells to be manipulated to prevent or treat disease.
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Affiliation(s)
- Stuart P Berzins
- School of Health Sciences, Federation University, Ballarat, Victoria 3350, Australia, the Fiona Elsey Cancer Research Institute, Ballarat, Victoria 3350, Australia, and the Department of Microbiology and Immunology, the Peter Doherty Institute, University of Melbourne, Parkville, Victoria 3010, Australia
| | - David S Ritchie
- Department of Clinical Hematology and Bone Marrow Transplant Service, Royal Melbourne Hospital, Parkville, Victoria 3050, Australia, and the Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3050, Australia
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19
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Sag D, Krause P, Hedrick CC, Kronenberg M, Wingender G. IL-10-producing NKT10 cells are a distinct regulatory invariant NKT cell subset. J Clin Invest 2014; 124:3725-40. [PMID: 25061873 DOI: 10.1172/jci72308] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 06/05/2014] [Indexed: 12/11/2022] Open
Abstract
Invariant natural killer T (iNKT) cells rapidly produce copious amounts of multiple cytokines after activation, thereby impacting a wide variety of different immune reactions. However, strong activation of iNKT cells with α-galactosylceramide (αGalCer) reportedly induces a hyporeactive state that resembles anergy. In contrast, we determined here that iNKT cells from mice pretreated with αGalCer retain cytotoxic activity and maintain the ability to respond to TCR-dependent as well as TCR-independent cytokine-mediated stimulation. Additionally, αGalCer-pretreated iNKT cells acquired characteristics of regulatory cells, including production and secretion of the immunomodulatory cytokine IL-10. Through the production of IL-10, αGalCer-pretreated iNKT cells impaired antitumor responses and reduced disease in experimental autoimmune encephalomyelitis, a mouse model of autoimmune disease. Furthermore, a subset of iNKT cells with a similar inhibitory phenotype and function were present in mice not exposed to αGalCer and were enriched in mouse adipose tissue and detectable in human PBMCs. These data demonstrate that IL-10-producing iNKT cells with regulatory potential (NKT10 cells) represent a distinct iNKT cell subset.
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20
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Roozbeh M, Mohammadpour H, Azizi G, Ghobadzadeh S, Mirshafiey A. The potential role of iNKT cells in experimental allergic encephalitis and multiple sclerosis. Immunopharmacol Immunotoxicol 2014; 36:105-13. [DOI: 10.3109/08923973.2014.897726] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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21
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Liposomes of phosphatidylcholine and cholesterol induce an M2-like macrophage phenotype reprogrammable to M1 pattern with the involvement of B-1 cells. Immunobiology 2014; 219:403-15. [PMID: 24594322 DOI: 10.1016/j.imbio.2014.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 12/14/2013] [Accepted: 01/24/2014] [Indexed: 12/21/2022]
Abstract
Macrophages respond to endogenous and non-self stimuli acquiring the M1 or M2 phenotypes, corresponding to classical or alternative activation, respectively. The role of B-1 cells in the regulation of macrophage polarization through the secretion of interleukin (IL)-10 has been demonstrated. However, the influence of B-1 cells on macrophage phenotype induction by an immunogen that suppress their ability to secrete IL-10 has not been explored. Here, we studied the peritoneal macrophage pattern induced by liposomes comprised of dipalmitoylphosphatidylcholine (DPPC) and cholesterol (Chol) carrying ovalbumin (OVA) (Lp DPPC/OVA), and the involvement of B-1 cells in macrophage polarization. Peritoneal cells from BALB/c, B-1 cells-deficient BALB/xid and C57BL/6 mice immunized with Lp DPPC/OVA and OVA in soluble form (PBS/OVA) were analyzed and stimulated or not in vitro with lipopolysaccharide (LPS). Peritoneal macrophages from BALB/c and C57BL/6 mice immunized with Lp DPPC/OVA showed an M2-like phenotype as evidenced by their high arginase activity without LPS stimulation. Upon stimulation, these macrophages were reprogrammable toward the M1 phenotype with the upregulation of nitric oxide (NO) and a decrease in IL-10 secretion. In addition, high IFN-γ levels were detected in the culture supernatant of peritoneal cells from BALB/c and C57BL/6 mice immunized with Lp DPPC/OVA. Nevertheless, still high levels of arginase activity and undetectable levels of IL-12 were found, indicating that the switch to a classical activation state was not complete. In the peritoneal cells from liposomes-immunized BALB/xid mice, levels of arginase activity, NO, and IL-6 were below those from wild type animals, but the last two products were restored upon adoptive transfer of B-1 cells, together with an increase in IFN-γ secretion. Summarizing, we have demonstrated that Lp DPPC/OVA induce an M2-like pattern in peritoneal macrophages reprogrammable to M1 phenotype after LPS stimulation, with the involvement of B-1 cells.
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22
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Van Kaer L. Role of invariant natural killer T cells in immune regulation and as potential therapeutic targets in autoimmune disease. Expert Rev Clin Immunol 2014; 2:745-57. [DOI: 10.1586/1744666x.2.5.745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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23
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Terabe M, Berzofsky JA. The immunoregulatory role of type I and type II NKT cells in cancer and other diseases. Cancer Immunol Immunother 2014; 63:199-213. [PMID: 24384834 DOI: 10.1007/s00262-013-1509-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 12/08/2013] [Indexed: 12/26/2022]
Abstract
NKT cells are CD1d-restricted T cells that recognize lipid antigens. They also have been shown to play critical roles in the regulation of immune responses. In the immune responses against tumors, two subsets of NKT cells, type I and type II, play opposing roles and cross-regulate each other. As members of both the innate and adaptive immune systems, which form a network of multiple components, they also interact with other immune components. Here, we discuss the function of NKT cells in tumor immunity and their interaction with other regulatory cells, especially CD4(+)CD25(+)Foxp3(+) regulatory T cells.
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Affiliation(s)
- Masaki Terabe
- Vaccine Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 41-Room D702, 41 Medlars Drive, Bethesda, MD, 20892, USA,
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24
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O'Konek JJ, Kato S, Takao S, Izhak L, Xia Z, Illarionov P, Besra GS, Terabe M, Berzofsky JA. β-mannosylceramide activates type I natural killer t cells to induce tumor immunity without inducing long-term functional anergy. Clin Cancer Res 2013; 19:4404-11. [PMID: 23804426 DOI: 10.1158/1078-0432.ccr-12-2169] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
PURPOSE Most studies characterizing antitumor properties of invariant natural killer T (iNKT) cells have used the agonist, α-galactosylceramide (α-GalCer). However, α-GalCer induces strong, long-lasting anergy of iNKT cells, which could be a major detriment for clinical therapy. A novel iNKT cell agonist, β-mannosylceramide (β-ManCer), induces strong antitumor immunity through a mechanism distinct from that of α-GalCer. The objective of this study was to determine whether β-ManCer induces anergy of iNKT cells. EXPERIMENTAL DESIGN Induction of anergy was determined by ex vivo analysis of splenocytes from mice pretreated with iNKT cell agonists as well as in the CT26 lung metastasis in vivo tumor model. RESULTS β-ManCer activated iNKT cells without inducing long-term anergy. The transience of anergy induction correlated with a shortened duration of PD-1 upregulation on iNKT cells activated with β-ManCer, compared with α-GalCer. Moreover, whereas mice pretreated with α-GalCer were unable to respond to a second glycolipid stimulation to induce tumor protection for up to 2 months, mice pretreated with β-ManCer were protected from tumors by a second stimulation equivalently to vehicle-treated mice. CONCLUSIONS The lack of long-term functional anergy induced by β-ManCer, which allows for a second dose to still give therapeutic benefit, suggests the strong potential for this iNKT cell agonist to succeed in settings where α-GalCer has failed.
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Affiliation(s)
- Jessica J O'Konek
- Vaccine Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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25
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East JE, Kennedy AJ, Webb TJ. Raising the roof: the preferential pharmacological stimulation of Th1 and th2 responses mediated by NKT cells. Med Res Rev 2012; 34:45-76. [PMID: 23239102 DOI: 10.1002/med.21276] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Natural killer T (NKT) cells serve as a bridge between the innate and adaptive immune systems, and manipulating their effector functions can have therapeutic significances in the treatment of autoimmunity, transplant biology, infectious disease, and cancer. NKT cells are a subset of T cells that express cell-surface markers characteristic of both natural killer cells and T cells. These unique immunologic cells have been demonstrated to serve as a link between the innate and adaptive immune systems through their potent cytokine production following the recognition of a range of lipid antigens, mediated through presentation of the major histocompatibility complex (MHC) class I like CD1d molecule, in addition to the NKT cell's cytotoxic capabilities upon activation. Although a number of glycolipid antigens have been shown to complex with CD1d molecules, most notably the marine sponge derived glycolipid alpha-galactosylceramide (α-GalCer), there has been debate as to the identity of the endogenous activating lipid presented to the T-cell receptor (TCR) via the CD1d molecule on antigen-presenting cells (APCs). This review aims to survey the use of pharmacological agents and subsequent structure-activity relationships (SAR) that have given insight into the binding interaction of glycolipids with both the CD1d molecules as well as the TCR and the subsequent immunologic response of NKT cells. These studies not only elucidate basic binding interactions but also pave the way for future pharmacological modulation of NKT cell responses.
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Affiliation(s)
- James E East
- Department of Microbiology and Immunology, The Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland 21201
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26
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Rosalia RA, Štěpánek I, Polláková V, Šímová J, Bieblová J, Indrová M, Moravcová S, Přibylová H, Bontkes HJ, Bubeník J, Sparwasser T, Reiniš M. Administration of anti-CD25 mAb leads to impaired α-galactosylceramide-mediated induction of IFN-γ production in a murine model. Immunobiology 2012. [PMID: 23182710 DOI: 10.1016/j.imbio.2012.10.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
CD4(+)CD25(+)Foxp3(+) T regulatory cells (Tregs) and CD1d-restricted invariant natural killer T (iNKT) cells are two cell types that are known to regulate immune reactions. Depletion or inactivation of Tregs using specific anti-CD25 antibodies in combination with immunostimulation is an attractive modality especially in anti-tumour immunotherapy. However, CD25 is not expressed exclusively on Tregs but also on subpopulations of activated lymphocytes. Therefore, the modulatory effects of the specific anti-CD25 antibodies can also be partially attributed to their interactions with the effector cells. Here, the effector functions of iNKT cells were analysed in combination with anti-CD25 mAb PC61. Upon PC61 administration, α-galactosylceramide (α-GalCer)-mediated activation of iNKT cells resulted in decreased IFN-γ but not IL-4 production. In order to determine whether mutual interactions between Tregs and iNKT cells take place, we compared IFNγ production after α-GalCer administration in anti-CD25-treated and "depletion of regulatory T cell" (DEREG) mice. Since no profound effects on IFNγ induction were observed in DEREG mice, deficient in FoxP3(+) Tregs, our results indicate that the anti-CD25 antibody acts directly on CD25(+) effector cells. In vivo experiments demonstrated that although both α-GalCer and PC61 administration inhibited TC-1 tumour growth in mice, no additive/synergic effects were observed when these substances were used in combination therapy.
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MESH Headings
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Antigens, CD1d/immunology
- Antigens, CD1d/metabolism
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Cell Line, Tumor
- Enzyme-Linked Immunosorbent Assay
- Flow Cytometry
- Forkhead Transcription Factors/immunology
- Forkhead Transcription Factors/metabolism
- Galactosylceramides/administration & dosage
- Galactosylceramides/immunology
- Galactosylceramides/pharmacology
- Gene Expression/drug effects
- Gene Expression/immunology
- Heparin-binding EGF-like Growth Factor
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/immunology
- Intercellular Signaling Peptides and Proteins/metabolism
- Interferon-gamma/genetics
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Interleukin-2 Receptor alpha Subunit/immunology
- Interleukin-2 Receptor alpha Subunit/metabolism
- Interleukin-4/genetics
- Interleukin-4/immunology
- Interleukin-4/metabolism
- Kaplan-Meier Estimate
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Natural Killer T-Cells/drug effects
- Natural Killer T-Cells/immunology
- Natural Killer T-Cells/metabolism
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/immunology
- Neoplasms, Experimental/pathology
- Reverse Transcriptase Polymerase Chain Reaction
- T-Lymphocytes, Regulatory/drug effects
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- Tumor Burden/drug effects
- Tumor Burden/immunology
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Affiliation(s)
- Rodney A Rosalia
- Department of Tumour Immunology of the Institute of Molecular Genetics, v. v. i., Academy of Sciences of the Czech Republic, Prague 4, Czech Republic
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27
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Transient Foxp3(+) regulatory T-cell depletion enhances therapeutic anticancer vaccination targeting the immune-stimulatory properties of NKT cells. Immunol Cell Biol 2012; 91:105-14. [PMID: 23090488 DOI: 10.1038/icb.2012.58] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The natural killer T (NKT) cell ligand, alpha-galactosylceramide (α-GalCer), represents a potential adjuvant to boost immunotherapeutic vaccination strategies against poorly immunogenic cancers. The objective of this study was to assess the therapeutic potential of an α-GalCer-loaded tumor-cell vaccine against solid tumors in mice and to enhance the effectiveness of this approach by removing immune suppression associated with the activity of Foxp3(+) regulatory T cells (Tregs). In the B16F10 melanoma model, we show that single vaccination with irradiated, α-GalCer-loaded tumor cells resulted in suppression of established subcutaneous (s.c.) B16F10 tumor growth, which was mediated by NKT cell-dependent IFN-γ production and enhanced in the absence of IL-17 A. Selective depletion of Foxp3(+) Tregs in transgenic DEpletion of REGulatory T cells (DEREG) mice led to significant inhibition of B16F10 tumor growth and enhanced survival of mice receiving vaccination. Short-term elimination of Foxp3(+) Tregs (<7 days) was sufficient to boost vaccine-induced immunity. Enhanced antitumor activity with combination therapy was associated with an increase in systemic NK cell and effector CD8(+) T-cell activation and IFN-γ production, as well as infiltration of effector CD8(+) T cells into the tumor. Overall, these findings demonstrate that transient depletion of Foxp3(+) Tregs constitutes a highly effective strategy to improve the therapeutic efficacy of anticancer vaccination with NKT cell adjuvants.
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28
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NKT cell adjuvant-based tumor vaccine for treatment of myc oncogene-driven mouse B-cell lymphoma. Blood 2012; 120:3019-29. [PMID: 22932803 DOI: 10.1182/blood-2012-04-426643] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Immunomodulators are effective in controlling hematologic malignancy by initiating or reactivating host antitumor immunity to otherwise poorly immunogenic and immune suppressive cancers. We aimed to boost antitumor immunity in B-cell lymphoma by developing a tumor cell vaccine incorporating α-galactosylceramide (α-GalCer) that targets the immune adjuvant properties of NKT cells. In the Eμ-myc transgenic mouse model, single therapeutic vaccination of irradiated, α-GalCer-loaded autologous tumor cells was sufficient to significantly inhibit growth of established tumors and prolong survival. Vaccine-induced antilymphoma immunity required NKT cells, NK cells, and CD8 T cells, and early IL-12-dependent production of IFN-γ. CD4 T cells, gamma/delta T cells, and IL-18 were not critical. Vaccine treatment induced a large systemic spike of IFN-γ and transient peripheral expansion of both NKT cells and NK cells, the major sources of IFN-γ. Furthermore, this vaccine approach was assessed in several other hematopoietic tumor models and was also therapeutically effective against AML-ETO9a acute myeloid leukemia. Replacing α-GalCer with β-mannosylceramide resulted in prolonged protection against Eμ-myc lymphoma. Overall, our results demonstrate a potent immune adjuvant effect of NKT cell ligands in therapeutic anticancer vaccination against oncogene-driven lymphomas, and this work supports clinical investigation of NKT cell-based immunotherapy in patients with hematologic malignancies.
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29
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Jervis PJ, Graham LM, Foster EL, Cox LR, Porcelli SA, Besra GS. New CD1d agonists: synthesis and biological activity of 6″-triazole-substituted α-galactosyl ceramides. Bioorg Med Chem Lett 2012; 22:4348-52. [PMID: 22652050 PMCID: PMC3401990 DOI: 10.1016/j.bmcl.2012.05.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 05/01/2012] [Accepted: 05/02/2012] [Indexed: 11/28/2022]
Abstract
Huisgen [3+2] dipolar cycloaddition of 6″-azido-6″-deoxy-α-galactosyl ceramide 11 with a range of alkynes (or a benzyne precursor) yielded a series of triazole-containing α-galactosyl ceramide (α-GalCer) analogues in high yield. These α-GalCer analogues and the precursor azide 11 were tested for their ability to activate iNKT cells and stimulate IL-2 cytokine secretion in vitro, and IFN-γ and IL-4 cytokine secretion in vivo. Some of these analogues, specifically 11, 12b, 12f and 13, were more potent IL-2 stimulators than the prototypical CD1d agonist, α-GalCer 1. In terms of any cytokine bias, most of the triazole-containing analogues exhibited a small Th2 cytokine-biasing response relative to that shown by α-GalCer 1. In contrast, the cycloaddition precursor, namely azide 11, provided a small Th1 cytokine-biasing response.
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Affiliation(s)
- Peter J. Jervis
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Lisa M. Graham
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461, USA
| | - Erin L. Foster
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461, USA
| | - Liam R. Cox
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Steven A. Porcelli
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461, USA
| | - Gurdyal S. Besra
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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30
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A possible relationship of natural killer T cells with humoral immune response to 23-valent pneumococcal polysaccharide vaccine in clinical settings. Vaccine 2012; 30:3304-10. [DOI: 10.1016/j.vaccine.2012.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 02/28/2012] [Accepted: 03/04/2012] [Indexed: 11/22/2022]
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31
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Kunikata T, Kohno K, Ushio S, Fukuda S. [Activation of natural killer T cells by NK-4, a criptocyanine dye]. YAKUGAKU ZASSHI 2012; 131:1667-74. [PMID: 22041707 DOI: 10.1248/yakushi.131.1667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We previously reported that oral administration of NK-4, a criptocyanine dye, enhances interleukin (IL)-12-depend- ent interferon (IFN)-γ production by lipopolysaccharide (LPS)-stimulated mouse splenocytes. These findings raised a possibility that NK-4 potentiated IFN-γ production by T cells, natural killer (NK) cells or natural killer T (NKT) cells in response to IL-12 produced by macrophage and dendritic cells. To explore this possibility, we first analyzed percentages of T, NK or NKT cells in splenocytes of mice that were administered NK-4 orally for three days. The percentage of NKT cells in splenocytes from NK-4-treated mice was significantly (p<0.05) increased compared to vehicle-treated mice. When splenocytes were stimulated with α-galactosylceramide (α-GalCer), an NKT cell ligand, IFN-γ production by splenocytes from NK-4-treated mice tended to increase, while no difference in the IL-4 production and proliferation were observed between the vehicle- and NK-4-treated mice. When IFN-γ/IL-4 ratios were calculated in individual mice, the ratios were significantly (p<0.05) elevated in NK-4-treated mice. Furthermore, IL-12 production by α-GalCer-stimulated splenocytes from NK-4-treated mice was also significantly (p<0.05) increased. These results suggest that oral administration of NK-4 increases the population of type I NKT cells with potent IFN-γ-producing activities. Since IL-12 and IFN-γ have been shown to play important roles in anti-tumor immunity as well as in the defence against bacterial infection, our results further imply that NK-4 may provide a potential therapeutic tool in cancer immunotherapy.
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Affiliation(s)
- Toshio Kunikata
- Biomedical Institute, Research Center, Hayashibara Biochemical Laboratories, Inc., Okayama, Japan.
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32
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Joshi SK, Lang GA, Devera TS, Johnson AM, Kovats S, Lang ML. Differential contribution of dendritic cell CD1d to NKT cell-enhanced humoral immunity and CD8+ T cell activation. J Leukoc Biol 2012; 91:783-90. [PMID: 22331103 DOI: 10.1189/jlb.1111559] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
CD1d-restricted type I NKT cells provide help for specific antibody production. B cells, which have captured and presented a T-dependent, antigen-derived peptide on MHC class II and CD1d-binding glycolipid α-GC on CD1d, respectively, activate Th and NKT cells to elicit B cell help. However, the role of the DC CD1d in humoral immunity remains unknown. We therefore constructed mixed bone marrow chimeras containing CD1d-expressing, DTR-transgenic DCs and CD1d(+) or CD1d(-) nontransgenic DCs. Following DT-mediated DC ablation and immunization, we observed that the primary and secondary antibody responses were equivalent in the presence of CD1d(+) and CD1d(-) DCs. In contrast, a total ablation of DCs delayed the primary antibody response. Further experiments revealed that depletion of CD1d(+) DCs blocked in vivo expansion of antigen-specific cytotoxic (CD8(+)) T lymphocytes. These results provide a clear demonstration that although CD1d expression on DCs is essential for NKT-enhanced CD8(+) T cell expansion, it is dispensable for specific antibody production.
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Affiliation(s)
- Sunil K Joshi
- University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
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33
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Zhang Z, Zhao W, Wang B, Xia C, Zhang W, Wang PG. The total synthesis of immunostimulant α-galactosylceramides from naturally configured α-galactoside raffinose. Org Lett 2011; 13:4530-3. [PMID: 21815670 PMCID: PMC3398385 DOI: 10.1021/ol201695n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of absolute anomeric confirmation α-galactosylceramide analogues from raffinose is described. Using the naturally occurring α-galactoside raffinose as the starting material, the easily maneuverable protocol without glycosylation reactions ensured the critical α-linkage in the product and simplified the synthetic procedures. The immunostimulatory activities of the new α-galactosylceramides were validated by both in vitro and in vivo NKT cell stimulation assays.
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Affiliation(s)
- Zhenxing Zhang
- College of Pharmacy, Nankai University, Tianjin 300071, China
| | - Wei Zhao
- College of Pharmacy, Nankai University, Tianjin 300071, China
| | - Bin Wang
- College of Pharmacy, Nankai University, Tianjin 300071, China
| | - Chengfeng Xia
- Departments of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA
| | - Wenpeng Zhang
- Departments of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA
| | - Peng George Wang
- College of Pharmacy, Nankai University, Tianjin 300071, China
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
- Departments of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA
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34
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Shafik AN, Khodeir MM, Gouda NA, Mahmoud ME. Improved antifibrotic effect of a combination of verapamil and silymarin in rat-induced liver fibrosis. Arab J Gastroenterol 2011; 12:143-9. [PMID: 22055593 DOI: 10.1016/j.ajg.2011.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 02/17/2011] [Accepted: 07/03/2011] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND STUDY AIMS Liver fibrosis progresses to cirrhosis in several settings, for example, severe acute alcoholic hepatitis, and hepatitis C virus (HCV) reinfection after liver transplantation. Cirrhosis produces hepatocellular dysfunction, which is also a risk factor for hepatocellular carcinoma. We studied verapamil as a prophylactic, therapeutic antifibrotic drug alone and in combination with silymarin in experimental rat's liver-induced fibrosis. MATERIAL AND METHODS Liver fibrosis was induced by intra-peritoneal injection of rats with pig serum 0.5ml twice weekly for 6 weeks, which resulted in score three fibrosis. Prophylactic verapamil alone and silymarin alone and a combination of both were administered at the same time of induction of liver fibrosis and continued for the duration of induction. Therapeutic verapamil was started on the last day of fibrosis induction and continued for 4 weeks. The extent of liver fibrosis was evaluated using Ishak's fibrosis score. Serum alanine aminotransferase (ALT) was measured for follow-up. RESULTS Compared to fibrotic model rats, prophylactic verapamil, silymarin and combined verapamil plus silymarin significantly resulted in lower serum ALT levels. Prophylactic use of verapamil and silymarin each alone revealed score 2 fibrosis with positive α-SMA immunostaining; while prophylactic treatment with combined verapamil plus silymarin revealed no fibrosis supported by negative α-SMA immunostaining. Verapamil treated fibrotic rat's liver revealed significant regression in liver fibrosis scores with positive α-SMA immunostaining. CONCLUSIONS Verapamil alone has a more significant prophylactic than therapeutic antifibrotic effect against induced liver fibrosis; it was more significant than silymarin. The combination of verapamil and silymarin, showed the best protection through their synergistic antifibrotic effect.
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Affiliation(s)
- Amani N Shafik
- Department of Pharmacology, Faculty of Medicine, Cairo University, Cairo, Egypt
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35
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Chakraborty NG. Immunoregulation through IL-10 gene expression and the fate of cytotoxic T lymphocyte-mediated tumor immunotherapy. INDIAN JOURNAL OF HUMAN GENETICS 2011; 15:3-8. [PMID: 20407642 PMCID: PMC2846567 DOI: 10.4103/0971-6866.50862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Gene analysis of tumor associated antigens revealed that tumor antigens are all normal gene product. Inducing tumor reactive cytotoxic T lymphocytes (CT) in the patients is same as inducing autoimmunity in the patients. Immunosuppressive cytokine interleukin-10 (IL-10) plays an important role in maintaining homeostasis or tolerance. To break the tumor tolerance, blocking and IL-10 secretion or intervention in the pathways of IL-10 gene activation is indeed important.
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Affiliation(s)
- Nitya G Chakraborty
- Department of Medicine, University of Connecticut School of Medicine, Farmington, CT 006030-1628, USA
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36
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Iyoda T, Ushida M, Kimura Y, Minamino K, Hayuka A, Yokohata S, Ehara H, Inaba K. Invariant NKT cell anergy is induced by a strong TCR-mediated signal plus co-stimulation. Int Immunol 2011; 22:905-13. [PMID: 21118907 DOI: 10.1093/intimm/dxq444] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Vα14 TCR expressing invariant NK T (iNKT) cells recognize α-galactosylceramide (αGC)/CD1d complex and produce large amounts of various cytokines before the onset of the adaptive immunity. After stimulation with a high dose (2-5 μg) of αGC in vivo, iNKT cells in the spleen and liver become anergic in terms of the proliferation and cytokine production to subsequent stimulation. In this study, we monitor how iNKT anergy is induced. Anergized iNKT cells dramatically reduced the expression of IL-2Rα, and exogenous IL-2 restored the ability to proliferate and produce IL-4 but not to produce IFN-γ. Anergized iNKT cells expressed high levels of programmed death-1 (PD-1). However, iNKT cells in PD-1-deficient mice became anergic as a result of αGC injection, as do normal mice. Furthermore, anti-PD-1 blocking mAb was unable to restore their responsiveness. When iNKT cells were stimulated with immobilized anti-CD3 in the presence or absence of anti-CD28, they produced cytokines in a dose-dependent manner. Unlike in naive CD4 T cells, the strong TCR-mediated signaling with co-stimulation renders them anergic to any subsequent stimulation with αGC and spleen dendritic cells (DCs). Moreover, iNKT cells also became anergic after stimulation with phorbol-12-myristate-13-acetate + ionophore. Finally, the injection of αGC-pulsed DCs was more potent in inducing anergy than B cells. These results indicate that strong TCR-mediated activation with co-stimulation provides signals that induce the anergic state in iNKT cells.
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Affiliation(s)
- Tomonori Iyoda
- Laboratory of Immunobiology, Department of Animal Development and Physiology, Division of Systemic Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
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37
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Van Kaer L, Parekh VV, Wu L. Invariant NK T cells: potential for immunotherapeutic targeting with glycolipid antigens. Immunotherapy 2011; 3:59-75. [PMID: 21174558 DOI: 10.2217/imt.10.85] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Invariant NK T (iNKT) cells are a subset of T lymphocytes that recognize glycolipid antigens bound with the antigen-presenting molecule CD1d. iNKT cells have potent immunoregulatory activities that can promote or suppress immune responses during different pathological conditions. These immunoregulatory properties can be harnessed for therapeutic purposes with cognate glycolipid antigens, such as the marine sponge-derived glycosphingolipid α-galactosylceramide. Preclinical studies have shown substantial promise for iNKT cell-based treatments of infections, cancer and autoimmune and inflammatory diseases. Translation of these preclinical studies to the clinic, while faced with some obstacles, has already had some initial success. In this article, we review the immunodulatory activities of iNKT cells and the potential for developing iNKT cell-based prophylactic and curative therapies of human disease.
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Affiliation(s)
- Luc Van Kaer
- Department of Microbiology & Immunology, Vanderbilt University School of Medicine, Medical Center North, Room A-5301, 1161 21st Avenue South, Nashville, TN 37232-32363, USA.
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38
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Loh C, Pau E, Lajoie G, Li TT, Baglaenko Y, Cheung YH, Chang NH, Wither JE. Epistatic suppression of fatal autoimmunity in New Zealand black bicongenic mice. THE JOURNAL OF IMMUNOLOGY 2011; 186:5845-53. [PMID: 21464090 DOI: 10.4049/jimmunol.1003426] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Numerous mapping studies have implicated genetic intervals from lupus-prone New Zealand Black (NZB) chromosomes 1 and 4 as contributing to lupus pathogenesis. By introgressing NZB chromosomal intervals onto a non-lupus-prone B6 background, we determined that: NZB chromosome 1 congenic mice (denoted B6.NZBc1) developed fatal autoimmune-mediated kidney disease, and NZB chromosome 4 congenic mice (denoted B6.NZBc4) exhibited a marked expansion of B1a and NKT cells in the surprising absence of autoimmunity. In this study, we sought to examine whether epistatic interactions between these two loci would affect lupus autoimmunity by generating bicongenic mice that carry both NZB chromosomal intervals. Compared with B6.NZBc1 mice, bicongenic mice demonstrated significantly decreased mortality, kidney disease, Th1-biased IgG autoantibody isotypes, and differentiation of IFN-γ-producing T cells. Furthermore, a subset of bicongenic mice exhibited a paucity of CD21(+)CD1d(+) B cells and an altered NKT cell activation profile that correlated with greater disease inhibition. Thus, NZBc4 contains suppressive epistatic modifiers that appear to inhibit the development of fatal NZBc1 autoimmunity by promoting a shift away from a proinflammatory cytokine profile, which in some mice may involve NKT cells.
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Affiliation(s)
- Christina Loh
- Arthritis Center of Excellence, Toronto Western Research Institute, Toronto, Ontario M5T 2S8, Canada
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39
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α-Galactosylceramide ameliorates autoimmune diabetes in non-obese diabetic mice through a suppressive effect mediated by CD8+ T cells. Immunol Lett 2011; 138:54-62. [PMID: 21392534 DOI: 10.1016/j.imlet.2011.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 01/14/2011] [Accepted: 03/01/2011] [Indexed: 11/22/2022]
Abstract
Type 1 diabetes is an autoimmune disorder resulting from lymphocyte-mediated destruction of insulin-producing β cells in pancreas. Natural killer T cells are regulatory immune components controlling autoreactivity and immune homeostasis. Although early studies supported that amelioration of autoimmune diabetes by natural killer T cells was associated with Th1/2 shift, other Th2-independent regulatory mechanisms were also suggested. Since natural killer T cells are critical for the generation of CD8(+) regulatory T cells controlling anterior chamber-associated immune deviation and CD8(+) regulatory T cells also participate in suppression of immune responses like experimental autoimmune encephalomyelitis, we investigate whether the similar suppressive effects are involved in α-galactosylceramide-induced immune tolerance in non-obese diabetic mice. We demonstrate that repeated exposure of α-galactosylceramide reveals a hyporesponsiveness of total or antigen-presenting cells-depleted splenocytes upon anti-CD3/28 antibodies stimulation. The dispensability of dendritic cells in the hyporesponsiveness is consistent with the comparable expression of costimulatory molecules on CD11c(+) subsets between α-galactosylceramide- and vehicle-treated mice. α-Galactosylceramide treatment not only affects the effector T cell subsets and their cytokine production but also increases the secretion of transforming growth factor-β by splenocytes, implying the suppressive regulation. The adoptive transfer experiments demonstrate the suppressive effect of T cells from α-galactosylceramide-treated non-obese diabetic mice when co-transferred with vehicle-treated littermates. Finally, it reveals that CD8(+) subset among antigen-presenting cells-depleted splenocytes tends to confer the suppression since the protective ability vanishes upon withdrawal of CD8(+) subset. These results suggest that repeated exposure of α-galactosylceramide ameliorates autoimmune diabetes in non-obese diabetic mice mediated by CD8(+) T cell-associated suppression.
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40
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Matsumoto H, Kawamura T, Kobayashi T, Kanda Y, Kawamura H, Abo T. Coincidence of autoantibody production with the activation of natural killer T cells in α-galactosylceramide-mediated hepatic injury. Immunology 2011; 133:21-8. [PMID: 21320121 DOI: 10.1111/j.1365-2567.2011.03405.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Natural killer T (NKT) cells are known to be specifically activated by α-galactosylceramide (α-GalCer) via their interaction with CD1d. At that time, NKT cells mediate autoreactivity and eventually induce hepatic injury. As these immune responses resemble acute autoimmune hepatitis, it was examined whether autoantibody production and the activation of autoantibody-producing B-1 cells were accompanied by this phenomenon. Autoantibodies against Hep-2 cells and double-stranded DNA were detected in sera as early as day 3 (showing a peak at day 14) when mice were treated with α-GalCer. On day 3, B220(low) cells appeared in the liver. These B220(low) cells were CD5(-) (i.e. B-1b cells) and CD69(+) (an activation marker). Primarily, such B220(low) cells were present in the peritoneal cavity, but the proportion of B220(low) cells increased with the administration of α-GalCer even at this site. In parallel with the appearance of B220(low) cells in the liver, hepatic lymphocytes acquired the potential to produce autoantibodies in in vitro cell culture in the presence of lipopolysaccharide. These results suggested that hepatic injury induced by α-GalCer administration resembled acute autoimmune hepatitis and that the major effector lymphocytes were NKT cells with autoreactivity and autoantibody-producing B-1 cells.
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Affiliation(s)
- Hiroaki Matsumoto
- Department of Immunology, Niigata University School of Medicine, Niigata, Japan
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41
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O'Konek JJ, Illarionov P, Khursigara DS, Ambrosino E, Izhak L, Castillo BF, Raju R, Khalili M, Kim HY, Howell AR, Besra GS, Porcelli SA, Berzofsky JA, Terabe M. Mouse and human iNKT cell agonist β-mannosylceramide reveals a distinct mechanism of tumor immunity. J Clin Invest 2011; 121:683-94. [PMID: 21245578 DOI: 10.1172/jci42314] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Accepted: 11/17/2010] [Indexed: 01/07/2023] Open
Abstract
Type 1 or invariant NKT (iNKT) cell agonists, epitomized by α-galactosylceramide, protect against cancer largely by IFN-γ-dependent mechanisms. Here we describe what we believe to be a novel IFN-γ-independent mechanism induced by β-mannosylceramide, which also defines a potentially new class of iNKT cell agonist, with an unusual β-linked sugar. Like α-galactosylceramide, β-mannosylceramide directly activates iNKT cells from both mice and humans. In contrast to α-galactosylceramide, protection by β-mannosylceramide was completely dependent on NOS and TNF-α, neither of which was required to achieve protection with α-galactosylceramide. Moreover, at doses too low for either alone to protect, β-mannosylceramide synergized with α-galactosylceramide to protect mice against tumors. These results suggest that treatment with β-mannosylceramide provides a distinct mechanism of tumor protection that may allow efficacy where other agonists have failed. Furthermore, the ability of β-mannosylceramide to synergize with α-galactosylceramide suggests treatment with this class of iNKT agonist may provide protection against tumors in humans.
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42
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Elewaut D, Jacques P, Melis L, Venken K. Mechanisms Regulating TNF-Driven Gut and Joint Inflammation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 691:403-8. [DOI: 10.1007/978-1-4419-6612-4_42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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43
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Banchet-Cadeddu A, Hénon E, Dauchez M, Renault JH, Monneaux F, Haudrechy A. The stimulating adventure of KRN 7000. Org Biomol Chem 2011; 9:3080-104. [DOI: 10.1039/c0ob00975j] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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44
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Novak J, Lehuen A. Mechanism of regulation of autoimmunity by iNKT cells. Cytokine 2010; 53:263-70. [PMID: 21185200 DOI: 10.1016/j.cyto.2010.11.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 10/06/2010] [Accepted: 11/04/2010] [Indexed: 02/07/2023]
Abstract
iNKT cells, CD1d dependent natural killer T cells are a unique population of T cells. The capacity of iNKT cells to produce regulatory cytokines first provided an indication of their regulatory potential. Later on, in experimental models as well as in patients afflicted with an auto-immune disease, such as Type 1 diabetes mellitus, multiple sclerosis, and systemic lupus erythematosus along with others, a deficit in iNKT cell number was observed, suggesting the role these cells may possibly have in the prevention of auto-immune diseases. More importantly, experimental strategies which focused on increasing the volume or stimulation of iNKT cells in laboratory animals, demonstrated an improved level of protection against the development of auto-immune diseases. This article reviews the mechanism of protection against autoimmunity by iNKT cells, discusses the obstacles against and indications for the potential use of iNKT cell manipulation in the treatment of human auto-immune diseases.
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Affiliation(s)
- Jan Novak
- 3rd Faculty of Medicine, Charles University in Prague, Centre of Research for Diabetes, Endocrinological Diseases and Clinical Nutrition, Czech Republic.
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Jervis PJ, Cox LR, Besra GS. Synthesis of a versatile building block for the preparation of 6-N-derivatized α-galactosyl ceramides: rapid access to biologically active glycolipids. J Org Chem 2010; 76:320-3. [PMID: 21155575 PMCID: PMC3018865 DOI: 10.1021/jo102064p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
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A concise route to the 6-azido-6-deoxy-α-galactosyl-phytosphingosine derivative 9 is reported. Orthogonal protection of the two amino groups allows elaboration of 9 into a range of 6-N-derivatized α-galactosyl ceramides by late-stage introduction of the acyl chain of the ceramide and the 6-N-group in the sugar headgroup. Biologically active glycolipids 6 and 8 have been synthesized to illustrate the applicability of the approach.
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Affiliation(s)
- Peter J Jervis
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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Veerapen N, Reddington F, Salio M, Cerundolo V, Besra GS. Synthesis of truncated analogues of the iNKT cell agonist, α-galactosyl ceramide (KRN7000), and their biological evaluation. Bioorg Med Chem 2010; 19:221-8. [PMID: 21145749 PMCID: PMC3052434 DOI: 10.1016/j.bmc.2010.11.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 11/09/2010] [Accepted: 11/10/2010] [Indexed: 11/25/2022]
Abstract
Stimulation of iNKT cells by α-galactosyl ceramide (α-GalCer), also known as KRN7000, and its truncated analogue OCH induces both Th1- and Th2-cytokines, with OCH inducing a Th2-cytokine bias. Skewing of the iNKT cells’ response towards either a Th1- or Th2-cytokine profile offers potential therapeutic benefits. The length of both the acyl and the sphingosine chains in α-galactosyl ceramides is known to influence the cytokine release profile. We have synthesized analogues of α-GalCer with truncated sphingosine chains for biological evaluation, with particular emphasis on the Th1/Th2 distribution. Starting from a common precursor, d-lyxose, the sphingosine derivatives were synthesised via a straightforward Wittig condensation.
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Affiliation(s)
- Natacha Veerapen
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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Abstract
Sepsis is currently a leading cause of death in hospital intensive care units. Previous studies suggest that the pathophysiology of sepsis involves the hyperactivation of complex proinflammatory cascades that include the activation of various immune cells and the exuberant secretion of proinflammatory cytokines by these cells. Natural killer T-cells (NKTs) are a sublineage of T cells that share characteristics of conventional T cells and NK cells and bridge innate and adaptive immunity. More recently, NKT cells have been implicated in microbial immunity, including the onset of sepsis. Moreover, apolipoprotein E (apoE), a component of triglyceride-rich lipoproteins, has been shown to be protective in endotoxemia and gram-negative infections in addition to its well-known role in lipid metabolism. Here, we will review the role of NKT cells in sepsis and septic shock, the immunoregulatory role of apoE in the host immune response to infection, and propose a mechanism for this immunoregulation.
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48
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Jervis PJ, Veerapen N, Bricard G, Cox LR, Porcelli SA, Besra GS. Synthesis and biological activity of alpha-glucosyl C24:0 and C20:2 ceramides. Bioorg Med Chem Lett 2010; 20:3475-8. [PMID: 20529677 PMCID: PMC4374101 DOI: 10.1016/j.bmcl.2010.05.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/04/2010] [Accepted: 05/05/2010] [Indexed: 11/26/2022]
Abstract
Alpha-glucosyl ceramides 4 and 5 have been synthesised and evaluated for their ability to stimulate the activation and expansion of human iNKT cells. The key challenge in the synthesis of both target molecules was the stereoselective synthesis of the alpha-glycosidic linkage. Of the methods examined, glycosylation using per-TMS-protected glucosyl iodide 16 was completely alpha-selective and provided gram quantities of amine 11, from which alpha-glucosyl ceramides 4 and 5 were obtained by N-acylation. alpha-GlcCer 4, containing a C24 saturated acyl chain, stimulated a marked proliferation and expansion of human circulating iNKT cells in short-term cultures. alpha-GlcCer 5, which contains a C20 11,14-cis-diene acyl chain (C20:2), induced extremely similar levels of iNKT cell activation and expansion.
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Affiliation(s)
- Peter J Jervis
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
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49
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Veerapen N, Leadbetter EA, Brenner MB, Cox LR, Besra GS. Synthesis of a novel alpha-galactosyl ceramide haptenated-lipid antigen, a useful tool in demonstrating the involvement of iNKT cells in the production of antilipid antibodies. Bioconjug Chem 2010; 21:741-7. [PMID: 20345125 DOI: 10.1021/bc9005255] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new haptenated derivative of alpha-galactosyl ceramide (alpha-GalCer) has been synthesized to assist in the study of the mechanism of T cell help for the production of B cell antibodies. Our synthetic route provides access to an amine intermediate which can easily be extended to generate an array of compounds, useful in various ongoing studies. Herein, we also describe the biological evaluation of the nitrophenyl (NP) haptenated alpha-GalCer and demonstrate its importance in such mechanistic studies. For instance, in vitro studies showed that NP-alpha-GalCer stimulates both T and B cell proliferation while in vivo studies in immunized mice showed the production of IgG anti-NP antibodies after exposure to NP-alpha-GalCer. The interpretation of these results helps toward a better understanding of T cell help for the production of antibodies.
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Affiliation(s)
- Natacha Veerapen
- School of Biosciences and School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
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50
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Bontkes HJ, Moreno M, Hangalapura B, Lindenberg JJ, de Groot J, Lougheed S, van der Vliet HJJ, van den Eertwegh AJM, de Gruijl TD, von Blomberg BME, Scheper RJ. Attenuation of invariant natural killer T-cell anergy induction through intradermal delivery of alpha-galactosylceramide. Clin Immunol 2010; 136:364-74. [PMID: 20570567 DOI: 10.1016/j.clim.2010.04.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Revised: 04/05/2010] [Accepted: 04/28/2010] [Indexed: 11/28/2022]
Abstract
CD1d restricted, alpha-galactosylceramide (alphaGC) responsive invariant (i)NKT cells positively regulate immune responses. Both intravenous and intradermal administered alphaGC are known to activate iNKT cells. iNKT cells become unresponsive to a second intravenous alphaGC injection, whereas no data are available regarding potential anergy upon intradermal administration. Here, comparative analysis of two intradermal versus two intravenous injections in mice demonstrated that iNKT cell anergy was prevented by intradermal injection and when combined with a vaccine, superior tumor protection afforded by intradermally administered alphaGC. Moreover, human skin dendritic cells (DC) took up intradermally injected alphaGC and activated iNKT cells upon migration, while iNKT cells in human skin-draining lymph nodes expanded in response to alphaGC presented either by exogenously added DC or by CD1d positive antigen presenting cells in the lymph nodes. In conclusion, glycolipids such as alphaGC may greatly improve the efficacy of skin immunization strategies, targeting cutaneous and lymph node DC.
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Affiliation(s)
- Hetty J Bontkes
- Department of Pathology, VU University Medical Center, De Boelelaan 1117, 1081HV Amsterdam, The Netherlands.
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