1
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Lee S, Koh J, Chang Y, Kim HY, Chung DH. Invariant NKT Cells Functionally Link Microbiota-Induced Butyrate Production and Joint Inflammation. THE JOURNAL OF IMMUNOLOGY 2019; 203:3199-3208. [PMID: 31732526 DOI: 10.4049/jimmunol.1801314] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 09/20/2019] [Indexed: 01/05/2023]
Abstract
Emerging evidence indicates that the gut microbiota contributes to the regulation of joint inflammation by modulating the function of immune cells. However, the mechanism by which the microbiota regulates joint inflammation is unclear. To address this, we investigated the effect of the gut microbiota on Ab-induced arthritis (AIA). Feeding mice a high-fiber diet attenuated AIA in a microbiota-dependent manner. Among the short-chain fatty acids produced by the microbiota, butyrate suppressed cytokine production by invariant NKT (iNKT) cells by inhibiting class I histone deacetylases. Furthermore, butyrate alleviated AIA in wild-type, but not iNKT cell-deficient Jα18 knockout (KO), mice. Adoptive transfer of butyrate-pretreated iNKT cells had no effect on AIA in Jα18 KO mice, whereas transfer of untreated iNKT cells into Jα18 KO mice restored AIA. In conclusion, our data indicate that gut microbiota-induced butyrate production attenuates AIA by inhibiting cytokine production by iNKT cells. Thus, the microbiota/butyrate/iNKT cell axis may be a therapeutic target for joint inflammation.
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Affiliation(s)
- Sangsin Lee
- Laboratory of Immune Regulation, Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul 110-799, Korea
| | - Jaemoon Koh
- Department of Pathology, College of Medicine, Seoul National University, Seoul 110-799, Korea; and
| | - Yuna Chang
- Laboratory of Mucosal Immunity, Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul 110-799, Korea
| | - Hye Young Kim
- Laboratory of Mucosal Immunity, Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul 110-799, Korea
| | - Doo Hyun Chung
- Laboratory of Immune Regulation, Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul 110-799, Korea; .,Department of Pathology, College of Medicine, Seoul National University, Seoul 110-799, Korea; and
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2
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Lee B, Jo Y, Kim G, Ali LA, Sohn DH, Lee SG, Kim K, Shin E, Ryu SH, Hong C. Specific Inhibition of Soluble γc Receptor Attenuates Collagen-Induced Arthritis by Modulating the Inflammatory T Cell Responses. Front Immunol 2019; 10:209. [PMID: 30800133 PMCID: PMC6375885 DOI: 10.3389/fimmu.2019.00209] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/24/2019] [Indexed: 11/14/2022] Open
Abstract
IL-17 produced by Th17 cells has been implicated in the pathogenesis of rheumatoid arthritis (RA). It is important to prevent the differentiation of Th17 cells in RA. Homodimeric soluble γc (sγc) impairs IL-2 signaling and enhances Th17 differentiation. Thus, we aimed to block the functions of sγc by inhibiting the formation of homodimeric sγc. The homodimeric form of sγc was strikingly disturbed by sγc-binding DNA aptamer. Moreover, the aptamer effectively inhibited Th17 cell differentiation and restored IL-2 and IL-15 signaling impaired by sγc with evidences of increased survival of T cells. sγc was highly expressed in SF of RA patients and increased in established CIA mice. The therapeutic effect of PEG-aptamer was tested in CIA model and its treatment alleviated arthritis pathogenesis with impaired differentiation of pathogenic Th17, NKT1, and NKT17 cells in inflamed joint. Homodimeric sγc has pathogenic roles to exacerbate RA progression with differentiation of local Th17, NKT1, and NKT17 cells. Therefore, sγc is suggested as target of a therapeutic strategy for RA.
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Affiliation(s)
- Byunghyuk Lee
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, South Korea
| | - Yuna Jo
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, South Korea
| | - Geona Kim
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, South Korea
| | - Laraib Amir Ali
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, South Korea
| | - Dong Hyun Sohn
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, South Korea
| | - Seung-Geun Lee
- Division of Rheumatology, Department of Internal Medicine, Pusan National University School of Medicine, Pusan National University Hospital, Busan, South Korea
| | - Kiseok Kim
- Aptamer Sciences Inc., POSTECH Biotech Center, Pohang, South Korea
| | - Euisu Shin
- Aptamer Sciences Inc., POSTECH Biotech Center, Pohang, South Korea
| | - Sung Ho Ryu
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, South Korea
| | - Changwan Hong
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, South Korea
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3
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Mortier C, Govindarajan S, Venken K, Elewaut D. It Takes "Guts" to Cause Joint Inflammation: Role of Innate-Like T Cells. Front Immunol 2018; 9:1489. [PMID: 30008717 PMCID: PMC6033969 DOI: 10.3389/fimmu.2018.01489] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/15/2018] [Indexed: 12/12/2022] Open
Abstract
Innate-like T cells such as invariant natural killer T (iNKT) cells and mucosal-associated T (MAIT) cells, characterized by a semi-invariant T cell receptor and restriction toward MHC-like molecules (CD1 and MR1 respectively), are a unique unconventional immune subset acting at the interface of innate and adaptive immunity. Highly represented at barrier sites and capable of rapidly producing substantial amounts of cytokines, they serve a pivotal role as first-line responders against microbial infections. In contrast, it was demonstrated that innate-like T cells can be skewed toward a predominant pro-inflammatory state and are consequently involved in a number of autoimmune and inflammatory diseases like inflammatory bowel diseases and rheumatic disorders, such as spondyloarthritis (SpA) and rheumatoid arthritis. Interestingly, there is link between gut and joint disease as they often co-incide and share certain aspects of the pathogenesis such as established genetic risk factors, a critical role for pro-inflammatory cytokines, such as TNF-α, IL-23, and IL-17 and therapeutic susceptibility. In this regard dysregulated IL-23/IL-17 responses appear to be crucial in both debilitating pathologies and innate-like T cells likely act as key player. In this review, we will explore the remarkable features of iNKT cells and MAIT cells, and discuss their contribution to immunity and combined gut-joint disease.
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Affiliation(s)
- Céline Mortier
- Department of Rheumatology, Ghent University Hospital, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB Center for Inflammation Research, Ghent University, Ghent, Belgium
| | - Srinath Govindarajan
- Department of Rheumatology, Ghent University Hospital, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB Center for Inflammation Research, Ghent University, Ghent, Belgium
| | - Koen Venken
- Department of Rheumatology, Ghent University Hospital, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB Center for Inflammation Research, Ghent University, Ghent, Belgium
| | - Dirk Elewaut
- Department of Rheumatology, Ghent University Hospital, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB Center for Inflammation Research, Ghent University, Ghent, Belgium
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4
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Wang J, Yang Q, Zhang Q, Yin C, Zhou L, Zhou J, Wang Y, Mi QS. Invariant Natural Killer T Cells Ameliorate Monosodium Urate Crystal-Induced Gouty Inflammation in Mice. Front Immunol 2017; 8:1710. [PMID: 29312287 PMCID: PMC5733058 DOI: 10.3389/fimmu.2017.01710] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/20/2017] [Indexed: 12/31/2022] Open
Abstract
Gout is an inflammatory arthritis caused by deposition of intra-articular monosodium urate (MSU) crystal. Previous studies have focused on resident macrophage, infiltrating monocyte, and neutrophil responses to MSU crystal; yet the mechanisms of cellular changes and the potential involvement of other regulatory immune cells remain largely unknown. Invariant natural killer T (iNKT) cells, an innate type of T cell, are involved in the development of various inflammatory diseases. Here, we investigate the role of iNKT cells in MSU crystal-induced gouty inflammation. MSU crystal-induced inflammatory profiles in an air-pouch model were examined in iNKT-deficient CD1d knockout (KO) and wild-type (WT) control mice. To explore potential mechanisms of iNKT cell regulation of gouty inflammation, we cocultured CD4+ or CD4−iNKT cells with bone marrow-derived macrophages (BMDMs). We found that iNKT cells quickly migrated to the site of inflammation upon MSU crystal stimulation in WT mice. The total number of infiltrating cells in CD1d KO mice, especially neutrophils, was dramatically increased at 6 and 12 h (P < 0.01) post-MSU crystal challenge, compared with WT controls. BMDMs cocultured with CD4+iNKT cells produced less tumor necrosis factor-α and expressed higher levels of M2 macrophage markers, including Clec7a, Pdcd1Ig2, and interleukin-4 (P < 0.01), compared with BMDMs cocultured with CD4−iNKT cells or conventional CD4+ T cells. CD4+iNKT cells are one of the key regulators of MSU crystal-induced gouty inflammation through the control of macrophage polarization. iNKT cells may serve as a new therapeutic target for gout.
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Affiliation(s)
- Jie Wang
- Department of Endocrinology, Affiliated Hospital of Qingdao University, Qingdao, China.,Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States
| | - Qibin Yang
- Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States.,Department of Rheumatology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Quanbo Zhang
- Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States.,Department of Gerontology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Congcong Yin
- Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States
| | - Li Zhou
- Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States.,Department of Internal Medicine, Henry Ford Health System, Detroit, MI, United States
| | - Jingguo Zhou
- Department of Rheumatology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Yangang Wang
- Department of Endocrinology, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qing-Sheng Mi
- Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, United States.,Center for Cutaneous Biology and Immunology Research, Department of Dermatology, Henry Ford Health System, Detroit, MI, United States.,Department of Internal Medicine, Henry Ford Health System, Detroit, MI, United States
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5
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Baglaenko Y, Cruz Tleugabulova M, Gracey E, Talaei N, Manion KP, Chang NH, Ferri DM, Mallevaey T, Wither JE. Invariant NKT Cell Activation Is Potentiated by Homotypic trans-Ly108 Interactions. THE JOURNAL OF IMMUNOLOGY 2017; 198:3949-3962. [PMID: 28373584 DOI: 10.4049/jimmunol.1601369] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 03/07/2017] [Indexed: 01/27/2023]
Abstract
Invariant NKT (iNKT) cells are innate lymphocytes that respond to glycolipids presented by the MHC class Ib molecule CD1d and are rapidly activated to produce large quantities of cytokines and chemokines. iNKT cell development uniquely depends on interactions between double-positive thymocytes that provide key homotypic interactions between signaling lymphocyte activation molecule (SLAM) family members. However, the role of SLAM receptors in the differentiation of iNKT cell effector subsets and activation has not been explored. In this article, we show that C57BL/6 mice containing the New Zealand Black Slam locus have profound alterations in Ly108, CD150, and Ly9 expression that is associated with iNKT cell hyporesponsiveness. This loss of function was only apparent when dendritic cells and iNKT cells had a loss of SLAM receptor expression. Using small interfering RNA knockdowns and peptide-blocking strategies, we demonstrated that trans-Ly108 interactions between dendritic cells and iNKT cells are critical for robust activation. LY108 costimulation similarly increased human iNKT cell activation. Thus, in addition to its established role in iNKT cell ontogeny, Ly108 regulates iNKT cell function in mice and humans.
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Affiliation(s)
- Yuriy Baglaenko
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | | | - Eric Gracey
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | - Nafiseh Talaei
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | - Kieran Patricia Manion
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | - Nan-Hua Chang
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada
| | - Dario Michael Ferri
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | - Thierry Mallevaey
- Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and
| | - Joan E Wither
- Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada; .,Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; and.,Department of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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6
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Zhou J, Ding Y, Zhang Y, Feng Y, Tang X, Zhao X. CD3 +CD56 + natural killer T cell activity in children with different forms of juvenile idiopathic arthritis and the influence of etanercept treatment on polyarticular subgroup. Clin Immunol 2016; 176:1-11. [PMID: 28025136 DOI: 10.1016/j.clim.2016.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 11/03/2016] [Accepted: 12/12/2016] [Indexed: 10/20/2022]
Abstract
Juvenile idiopathic arthritis (JIA) has three major onset types with widely varying clinical features. We assessed the natural killer T (NKT) cell function in patients with different JIA subtypes, and found systemic patients exhibited lower NKT cell counts, perforin and granzyme B expression, while the pauciarticular and polyarticular patients displayed higher perforin and granzyme B expression as compared with the controls. The synovial fluid had more NKT cells with higher levels of perforin, granzyme B, and tumour necrosis factor (TNF)-α than peripheral cells. The polyarticular patients that responded to etanercept had lower NKT cell counts, intracellular perforin, granzyme B and the mean fluorescence intensity of TNF-α than the patients that did not respond. Treatment with etanercept reduced the granzyme B and perforin, interferon (IFN)-γ and TNF-α expression in NKT cells in the responsive group. Therefore, a higher NKT cell function may indicate a decreased response to etanercept in polyarticular patients.
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Affiliation(s)
- Juan Zhou
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China.
| | - Yuan Ding
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China
| | - Yu Zhang
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China
| | - Ye Feng
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China
| | - Xuemei Tang
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China
| | - Xiaodong Zhao
- Department of Immunology, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing Key Laboratory of Child Infection and Immunity, China
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7
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Abstract
Many rheumatic diseases are characterized by having an autoimmune background. Determining the mechanisms underlying autoimmunity is, therefore, important to further understand these diseases and to inform future lines of research aimed at developing new treatments and cures. As fast responders, innate lymphocytes have protective or pathogenic roles in the initiation as well as the maintenance of immune responses in general, and they contribute to tissue homeostasis, among other functions. Innate lymphocytes also seem to be involved in autoimmunity in particular. Since 2010, accumulating evidence clearly shows that different populations of innate lymphocytes have roles in responding to antigen-specific autoantibody and autoreactive T cells, thereby amplifying or attenuating disease processes. Cytotoxicity is a cardinal feature of many innate lymphocytes and can contribute to inflammatory tissue damage. Finally, innate lymphocytes can respond to biologic therapies for autoimmune diseases. Consequently, like TNF and other effector molecules, certain innate lymphocyte subsets might be appropriate therapeutic targets to ameliorate various autoimmune diseases. In this Review, we summarize the main characteristics and functions of innate lymphocyte subsets, and describe their roles in autoimmune disease. We also discuss how biologic therapies influence innate lymphocyte function and consider the potential for these cell subsets to act as future therapeutic targets.
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8
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Jin HM, Kee SJ, Cho YN, Kang JH, Kim MJ, Jung HJ, Park KJ, Kim TJ, Lee SI, Choi H, Koh JT, Kim N, Park YW. Dysregulated osteoclastogenesis is related to natural killer T cell dysfunction in rheumatoid arthritis. Arthritis Rheumatol 2016; 67:2639-50. [PMID: 26097058 DOI: 10.1002/art.39244] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 06/09/2015] [Indexed: 01/15/2023]
Abstract
OBJECTIVE To investigate the role played by natural killer T (NKT) cells in osteoclastogenesis and their effects on inflammatory bone destruction. METHODS Patients with rheumatoid arthritis (RA) (n = 25) and healthy controls (n = 12) were enrolled in this study. In vitro osteoclastogenesis experiments were performed using peripheral blood mononuclear cells (PBMCs) in the presence of macrophage colony-stimulating factor and RANKL. PBMCs were cultured in vitro with α-galactosylceramide (αGalCer), and proliferation indices of NKT cells were estimated by flow cytometry. In vivo effects of αGalCer-stimulated NKT cells on inflammation and bone destruction were determined in mice with collagen-induced arthritis. RESULTS In vitro osteoclastogenesis was found to be significantly inhibited by αGalCer in healthy controls but not in RA patients. Proliferative responses of NKT cells and STAT-1 phosphorylation in monocytes in response to αGalCer were impaired in RA patients. Notably, αGalCer-stimulated NKT cells inhibited osteoclastogenesis mainly via interferon-γ production in a cytokine-dependent manner (not by cell-cell contact) and down-regulated osteoclast-associated genes. Mice treated with αGalCer showed less severe arthritis and reduced bone destruction. Moreover, proinflammatory cytokine expression in arthritic joints was found to be reduced by αGalCer treatment. CONCLUSION This study primarily demonstrates that αGalCer-stimulated NKT cells have a regulatory effect on osteoclastogenesis and a protective effect against inflammatory bone destruction. However, it also shows that these effects of αGalCer are diminished in RA patients and that this is related to NKT cell dysfunction. These findings provide important information for those searching for novel therapeutic strategies to prevent bone destruction in RA.
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Affiliation(s)
- Hye-Mi Jin
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Seung-Jung Kee
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Young-Nan Cho
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Jeong-Hwa Kang
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Moon-Ju Kim
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Hyun-Ju Jung
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Ki-Jeong Park
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Tae-Jong Kim
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Sang-Il Lee
- Gyeongsang National University School of Medicine, Gyeongnam, Republic of Korea
| | - Hyuck Choi
- Chonnam National University School of Dentistry, Gwangju, Republic of Korea
| | - Jeong-Tae Koh
- Chonnam National University School of Dentistry, Gwangju, Republic of Korea
| | - Nacksung Kim
- Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Yong-Wook Park
- Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
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9
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Mansour S, Tocheva AS, Sanderson JP, Goulston LM, Platten H, Serhal L, Parsons C, Edwards MH, Woelk CH, Elkington PT, Elliott T, Cooper C, Edwards CJ, Gadola SD. Structural and Functional Changes of the Invariant NKT Clonal Repertoire in Early Rheumatoid Arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 195:5582-91. [PMID: 26553073 PMCID: PMC4671310 DOI: 10.4049/jimmunol.1501092] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 10/09/2015] [Indexed: 11/19/2022]
Abstract
Invariant NKT cells (iNKT) are potent immunoregulatory T cells that recognize CD1d via a semi-invariant TCR (iNKT-TCR). Despite the knowledge of a defective iNKT pool in several autoimmune conditions, including rheumatoid arthritis (RA), a clear understanding of the intrinsic mechanisms, including qualitative and structural changes of the human iNKT repertoire at the earlier stages of autoimmune disease, is lacking. In this study, we compared the structure and function of the iNKT repertoire in early RA patients with age- and gender-matched controls. We analyzed the phenotype and function of the ex vivo iNKT repertoire as well as CD1d Ag presentation, combined with analyses of a large panel of ex vivo sorted iNKT clones. We show that circulating iNKTs were reduced in early RA, and their frequency was inversely correlated to disease activity score 28. Proliferative iNKT responses were defective in early RA, independent of CD1d function. Functional iNKT alterations were associated with a skewed iNKT-TCR repertoire with a selective reduction of high-affinity iNKT clones in early RA. Furthermore, high-affinity iNKTs in early RA exhibited an altered functional Th profile with Th1- or Th2-like phenotype, in treatment-naive and treated patients, respectively, compared with Th0-like Th profiles exhibited by high-affinity iNKTs in controls. To our knowledge, this is the first study to provide a mechanism for the intrinsic qualitative defects of the circulating iNKT clonal repertoire in early RA, demonstrating defects of iNKTs bearing high-affinity TCRs. These defects may contribute to immune dysregulation, and our findings could be exploited for future therapeutic intervention.
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Affiliation(s)
- Salah Mansour
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom;
| | - Anna S Tocheva
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom
| | | | - Lyndsey M Goulston
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton SO16 6YD, United Kingdom; National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Helen Platten
- National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Lina Serhal
- National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Camille Parsons
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Mark H Edwards
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton SO16 6YD, United Kingdom; National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Christopher H Woelk
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Paul T Elkington
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Tim Elliott
- Institute for Life Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom; Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Cyrus Cooper
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton SO16 6YD, United Kingdom; National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom; Oxford National Institute for Health Research Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford OX3 7HE, United Kingdom; and
| | - Christopher J Edwards
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton SO16 6YD, United Kingdom; National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom; Oxford National Institute for Health Research Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford OX3 7HE, United Kingdom; and
| | - Stephan D Gadola
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, United Kingdom; National Institute for Health Research Wellcome Trust Clinical Research Facility, University of Southampton, Southampton SO16 6YD, United Kingdom; Novartis Institutes of Biomedical Research, 4002 Basel, Switzerland
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10
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Van Kaer L, Parekh VV, Wu L. The Response of CD1d-Restricted Invariant NKT Cells to Microbial Pathogens and Their Products. Front Immunol 2015; 6:226. [PMID: 26029211 PMCID: PMC4429631 DOI: 10.3389/fimmu.2015.00226] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 04/27/2015] [Indexed: 12/18/2022] Open
Abstract
Invariant natural killer T (iNKT) cells become activated during a wide variety of infections. This includes organisms lacking cognate CD1d-binding glycolipid antigens recognized by the semi-invariant T cell receptor of iNKT cells. Additional studies have shown that iNKT cells also become activated in vivo in response to microbial products such as bacterial lipopolysaccharide, a potent inducer of cytokine production in antigen-presenting cells (APCs). Other studies have shown that iNKT cells are highly responsive to stimulation by cytokines such as interleukin-12. These findings have led to the concept that microbial pathogens can activate iNKT cells either directly via glycolipids or indirectly by inducing cytokine production in APCs. iNKT cells activated in this manner produce multiple cytokines that can influence the outcome of infection, usually in favor of the host, although potent iNKT cell activation may contribute to an uncontrolled cytokine storm and sepsis. One aspect of the response of iNKT cells to microbial pathogens is that it is short-lived and followed by an extended time period of unresponsiveness to reactivation. This refractory period may represent a means to avoid chronic activation and cytokine production by iNKT cells, thus protecting the host against some of the negative effects of iNKT cell activation, but potentially putting the host at risk for secondary infections. These effects of microbial pathogens and their products on iNKT cells are not only important for understanding the role of these cells in immune responses against infections but also for the development of iNKT cell-based therapies.
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Affiliation(s)
- Luc Van Kaer
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine , Nashville, TN , USA
| | - Vrajesh V Parekh
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine , Nashville, TN , USA
| | - Lan Wu
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine , Nashville, TN , USA
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Lurati A, Bertani L, Marrazza M, Re KA, Bompane D, Scarpellini M. NK cell count as predictor of clinical response in patients with rheumatoid arthritis treated with rituximab. Biologics 2012; 6:83-7. [PMID: 22532776 PMCID: PMC3333820 DOI: 10.2147/btt.s29079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Purpose The relationship between antiCD20 therapy with rituximab and the lymphocytes phenotype in patients with rheumatoid arthritis was investigated, with an attempt to establish a relationship between commonly used clinical activity indices and variations in leukocyte count, in particular natural killer (NK) lymphocytes. Methods Patients with seropositive (cyclic citrullinated peptides and rheumatoid factor positive) rheumatoid arthritis (according to the American College of Rheumatology 1987 criteria) refractory to conventional and antitumor necrosis factor-alpha agents who were subsequently treated with rituximab, a chimeric monoclonal antibody directed against CD20, were enrolled between January 2009 and September 2009. All subjects were treated with rituximab standard rheumatologic dose of 1.0 g on days 1 and 15 every 6 months for at least 2 years. A clinical evaluation was performed at baseline and subsequently every 3 months thereafter. At each assessment activated NK (CD56+/CD16+/CD54bright) cell count was collected and disease activity was assessed using Disease Activity Score in 28 Joints and the Simplified Disease Activity Index (SDAI). Results Thirty-four patients were enrolled (mean age ± standard deviation: 54.8 ± 12.8 years). Basal SDAI was 21.75 ± 5.4 and NK cell count mean value was 157.6 ± 90. After 24 months, SDAI was 14 ± 1.2 and NK cell count mean value was 301.7 ± 21 (P < 0.05). An inverted correlation between SDAI and NK count was observed at 3 months (r = −0.36, P < 0.05), 6 months (r = −0.48, P < 0.45), 9 months (r = −0.47, P < 0.05), 12 months (r = −0.41, P < 0.01), 15 months (r = −0.58, P < 0.05), 18 months (r = −0.53, P < 0.05), 21 months (r = −0.68, P < 0.05), and 24 months (r = −0.61, P < 0.05). A linear regression model between all variables collected and SDAI/Disease Activity Score in 28 Joints at 6 months and 12 months confirmed a significant relationship between SDAI/Disease Activity Score in 28 Joints and NK cell count. Conclusion The data confirm the clinical efficacy of rituximab and suggests the use of NK cells as a predictor of clinical response in patients with rheumatoid arthritis.
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Subleski JJ, Jiang Q, Weiss JM, Wiltrout RH. The split personality of NKT cells in malignancy, autoimmune and allergic disorders. Immunotherapy 2011; 3:1167-84. [PMID: 21995570 PMCID: PMC3230042 DOI: 10.2217/imt.11.117] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
NKT cells are a heterogeneous subset of specialized, self-reactive T cells, with innate and adaptive immune properties, which allow them to bridge innate and adaptive immunity and profoundly influence autoimmune and malignant disease outcomes. NKT cells mediate these activities through their ability to rapidly express pro- and anti-inflammatory cytokines that influence the type and magnitude of the immune response. Not only do NKT cells regulate the functions of other cell types, but experimental evidence has found NKT cell subsets can modulate the functions of other NKT subsets. Depending on underlying mechanisms, NKT cells can inhibit or exacerbate autoimmunity and malignancy, making them potential targets for disease intervention. NKT cells can respond to foreign and endogenous antigenic glycolipid signals that are expressed during pathogenic invasion or ongoing inflammation, respectively, allowing them to rapidly react to and influence a broad array of diseases. In this article we review the unique development and activation pathways of NKT cells and focus on how these attributes augment or exacerbate autoimmune disorders and malignancy. We also examine the growing evidence that NKT cells are involved in liver inflammatory conditions that can contribute to the development of malignancy.
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Affiliation(s)
- Jeff J Subleski
- Laboratory of Experimental, Immunology, Cancer & Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institute of Health, Frederick, MD 21702, USA
| | - Qun Jiang
- Laboratory of Experimental, Immunology, Cancer & Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institute of Health, Frederick, MD 21702, USA
| | - Jonathan M Weiss
- Laboratory of Experimental, Immunology, Cancer & Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institute of Health, Frederick, MD 21702, USA
| | - Robert H Wiltrout
- Laboratory of Experimental, Immunology, Cancer & Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institute of Health, Frederick, MD 21702, USA
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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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Liu Y, Shu Q, Gao L, Hou N, Zhao D, Liu X, Zhang X, Xu L, Yue X, Zhu F, Guo C, Liang X, Ma C. Increased Tim-3 expression on peripheral lymphocytes from patients with rheumatoid arthritis negatively correlates with disease activity. Clin Immunol 2011; 137:288-95. [PMID: 20805041 DOI: 10.1016/j.clim.2010.07.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Revised: 07/24/2010] [Accepted: 07/27/2010] [Indexed: 01/25/2023]
Abstract
Tim-3 has been reported as an important regulatory molecule and plays a pivotal role in several autoimmunity diseases. Here, we demonstrated the increased expression of Tim-3 on peripheral CD4(+) T, CD8(+) T, NKT cells and monocytes from RA patients compared to those from healthy controls. Percentage of Tim-3(+) cells in peripheral blood mononuclear cells (PBMCs) showed an inverse correlation with disease activity score 28 (DAS28) and plasma TNF-α level. Similar negative correlations were found between disease activity and Tim-3 levels on CD4(+) T, CD8(+) T and NKT cells. Consistently, Tim-3 expression on CD3(+) T cells was further increased in patients with disease remission after treatment. Tim-3 expression on CD8(+) T and NKT cells negatively correlates with plasma TNF-α. Our results suggest that Tim-3 might participate in the proceeding of RA by its negative regulation on various T cell subsets. Tim-3 might be a potential new marker for assessing severity of RA.
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Affiliation(s)
- Ying Liu
- Institute of Immunology, Key Laboratory for Experimental Teratology of Ministry of Education, Shandong University School of Medicine, 44# Wenhua Xi Road, Jinan, Shandong, 250012, PR China
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Wu L, Van Kaer L. Natural killer T cells in health and disease. Front Biosci (Schol Ed) 2011; 3:236-51. [PMID: 21196373 DOI: 10.2741/s148] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Natural killer T (NKT) cells are a subset of T lymphocytes that share surface markers and functional characteristics with both conventional T lymphocytes and natural killer cells. Most NKT cells express a semi-invariant T cell receptor that reacts with glycolipid antigens presented by the major histocompatibility complex class I-related protein CD1d on the surface of antigen-presenting cells. NKT cells become activated during a variety of infections and inflammatory conditions, rapidly producing large amounts of immunomodulatory cytokines. NKT cells can influence the activation state and functional properties of multiple other cell types in the immune system and, thus, modulate immune responses against infectious agents, autoantigens, tumors, tissue grafts and allergens. One attractive aspect of NKT cells is that their immunomodulatory activities can be readily harnessed with cognate glycolipid antigens, such as the marine sponge-derived glycosphingolipid alpha-galactosylceramide. These properties of NKT cells are being exploited for therapeutic intervention to prevent or treat cancer, infections, and autoimmune and inflammatory diseases.
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Affiliation(s)
- Lan Wu
- Department of Microbiology and Immunology, Room A-5301, Medical Center North, 1161 21st Avenue South, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-2363, USA
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Abstract
Understanding the pathogenesis of joint inflammation and destruction in rheumatoid arthritis involves dissection of the cellular and molecular interactions that occur in synovial tissue. Development of effective targeted therapies has been based on progress in achieving such insights. Safer and more specific approaches to treatment could flow from discovery of cell-cell interaction pathways that are specific to inflammation of the joint and less important in the defense against systemic infection. This article highlights selected cell-cell interactions in rheumatoid arthritis synovium that may be worthy of evaluation as future therapeutic targets.
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Van Kaer L, Parekh VV, Wu L. Invariant natural killer T cells: bridging innate and adaptive immunity. Cell Tissue Res 2010; 343:43-55. [PMID: 20734065 DOI: 10.1007/s00441-010-1023-3] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/13/2010] [Indexed: 02/08/2023]
Abstract
Cells of the innate immune system interact with pathogens via conserved pattern-recognition receptors, whereas cells of the adaptive immune system recognize pathogens through diverse, antigen-specific receptors that are generated by somatic DNA rearrangement. Invariant natural killer T (iNKT) cells are a subset of lymphocytes that bridge the innate and adaptive immune systems. Although iNKT cells express T cell receptors that are generated by somatic DNA rearrangement, these receptors are semi-invariant and interact with a limited set of lipid and glycolipid antigens, thus resembling the pattern-recognition receptors of the innate immune system. Functionally, iNKT cells most closely resemble cells of the innate immune system, as they rapidly elicit their effector functions following activation, and fail to develop immunological memory. iNKT cells can become activated in response to a variety of stimuli and participate in the regulation of various immune responses. Activated iNKT cells produce several cytokines with the capacity to jump-start and modulate an adaptive immune response. A variety of glycolipid antigens that can differentially elicit distinct effector functions in iNKT cells have been identified. These reagents have been employed to test the hypothesis that iNKT cells can be harnessed for therapeutic purposes in human diseases. Here, we review the innate-like properties and functions of iNKT cells and discuss their interactions with other cell types of the immune system.
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Affiliation(s)
- Luc Van Kaer
- Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Medical Center North, Room A-5301, 1161 21st Ave. South, Nashville, TN 37232-2363, USA.
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Teige A, Bockermann R, Hasan M, Olofsson KE, Liu Y, Issazadeh-Navikas S. CD1d-Dependent NKT Cells Play a Protective Role in Acute and Chronic Arthritis Models by Ameliorating Antigen-Specific Th1 Responses. THE JOURNAL OF IMMUNOLOGY 2010; 185:345-56. [DOI: 10.4049/jimmunol.0901693] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Duarte J, Agua-Doce A, Oliveira VG, Fonseca JE, Graca L. Modulation of IL-17 and Foxp3 expression in the prevention of autoimmune arthritis in mice. PLoS One 2010; 5:e10558. [PMID: 20479941 PMCID: PMC2866666 DOI: 10.1371/journal.pone.0010558] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Accepted: 04/16/2010] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Rheumatoid Arthritis (RA) is a chronic immune mediated disease associated with deregulation of many cell types. It has been reported that different T cell subsets have opposite effects in disease pathogenesis, in particular Th17 and Treg cells. METHODOLOGY AND FINDINGS We investigated whether non-depleting anti-CD4 monoclonal antibodies, which have been reported as pro-tolerogenic, can lead to protection from chronic autoimmune arthritis in SKG mice--a recently described animal model of RA--by influencing the Th17/Treg balance. We found that non-depleting anti-CD4 prevented the onset of chronic autoimmune arthritis in SKG mice. Moreover, treated mice were protected from the induction of arthritis up to 60 days following anti-CD4 treatment, while remaining able to mount CD4-dependent immune responses to unrelated antigens. The antibody treatment also prevented disease progression in arthritic mice, although without leading to remission. Protection from arthritis was associated with an increased ratio of Foxp3, and decreased IL-17 producing T cells in the synovia. In vitro assays under Th17-polarizing conditions showed CD4-blockade prevents Th17 polarization, while favoring Foxp3 induction. CONCLUSIONS Non-depleting anti-CD4 can therefore induce long-term protection from chronic autoimmune arthritis in SKG mice through reciprocal changes in the frequency of Treg and Th17 cells in peripheral tissues, thus shifting the balance towards immune tolerance.
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Affiliation(s)
- Joana Duarte
- Instituto de Medicina Molecular, Faculdade de Medicina, University of Lisbon, Lisbon, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Ana Agua-Doce
- Instituto de Medicina Molecular, Faculdade de Medicina, University of Lisbon, Lisbon, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Vanessa G. Oliveira
- Instituto de Medicina Molecular, Faculdade de Medicina, University of Lisbon, Lisbon, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - João Eurico Fonseca
- Instituto de Medicina Molecular, Faculdade de Medicina, University of Lisbon, Lisbon, Portugal
- Rheumatology Department, Hospital de Santa Maria, Lisbon, Portugal
| | - Luis Graca
- Instituto de Medicina Molecular, Faculdade de Medicina, University of Lisbon, Lisbon, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
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Jacques P, Venken K, Van Beneden K, Hammad H, Seeuws S, Drennan MB, Deforce D, Verbruggen G, Apostolaki M, Kollias G, Lambrecht BN, De Vos M, Elewaut D. Invariant natural killer T cells are natural regulators of murine spondylarthritis. ACTA ACUST UNITED AC 2010; 62:988-99. [PMID: 20131252 DOI: 10.1002/art.27324] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To investigate the role of invariant natural killer T (iNKT) cells in TNF(DeltaARE/+) mice, an animal model of spondylarthritis (SpA) with both gut and joint inflammation. METHODS The frequency and activation of iNKT cells were analyzed on mononuclear cells from the lymph nodes and livers of mice, using flow cytometry with alpha-galactosylceramide/CD1d tetramers and quantitative polymerase chain reaction for the invariant V(alpha)14-J(alpha)18 rearrangement. Bone marrow-derived dendritic cells (DCs) were obtained by expansion of primary cells with granulocyte-macrophage colony-stimulating factor followed by coculture with iNKT cell hybridomas, and interleukin-2 release into the cocultures was then measured by enzyme-linked immunosorbent assay (ELISA). Cytokine levels were determined by ELISA or cytometric bead array analyses of freshly isolated DCs and iNKT cells in mixed cocultures. TNF(DeltaARE/+) mice were backcrossed onto J(alpha)18(-/-) and CD1d(-/-) mice, and disease onset was evaluated by clinical scoring, positron emission tomography, and histology. CD1d levels were analyzed on mononuclear cells in paired blood and synovial fluid samples from patients with SpA compared with healthy control subjects. RESULTS In the absence of iNKT cells, symptoms of gut and joint inflammation in TNF(DeltaARE/+)mice were aggravated. Invariant NKT cells were activated during the course of the disease. This was linked to an enrichment of inflammatory DCs, characterized by high levels of CD1d, particularly at draining sites of inflammation. A similar increase in CD1d levels was observed on DCs from patients with SpA. Inflammatory DCs from TNF(DeltaARE/+) mice stimulated iNKT cells to produce immunomodulatory cytokines, in the absence of exogenous stimulation. Prolonged, continuous exposure, but not short-term exposure, to tumor necrosis factor (TNF) was found to be responsible for the enhanced DC-NKT cell crosstalk. CONCLUSION This mode of iNKT cell activation represents a natural counterregulatory mechanism for the dampening of TNF-driven inflammation.
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Park KS, Park JH, Song YW. Inhibitory NKG2A and activating NKG2D and NKG2C natural killer cell receptor genes: susceptibility for rheumatoid arthritis. ACTA ACUST UNITED AC 2008; 72:342-6. [PMID: 18700876 DOI: 10.1111/j.1399-0039.2008.01110.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The inhibitory (NKG2A) and activating (NKG2D and NKG2C) natural killer (NK) cell receptors are expressed on a subset of NK and T cells. They regulate the innate and adaptive immune systems related to cytotoxicity and cytokine production that are involved in the pathogenesis of rheumatoid arthritis (RA). The role of inhibitory and activating NK cell receptor genes might contribute to chronic inflammation and destruction of bone and cartilage in RA. Therefore, we investigated the association of the NKG2A, NKG2C, and NKG2D genotypes with RA. NKG2A (KLRC1) NKG2C (KLRC2), and NKG2D (KLRK1, D12S249E) genes were genotyped in 210 unrelated patients with RA and 298 controls using a polymerase chain reaction-restriction fragment length polymorphism. We further investigated the relationships between the genotypes of each single nucleotide polymorphism and the presence of rheumatoid factor (RF), antinuclear antibody (ANA), and bony erosions in RA patients. The major NKG2A c.338-90*A/*A, NKG2C102*Ser/*Ser, and NKG2D72*Ala/*Ala genotypes in RA were significantly associated compared with controls [P = 0.013, odds ratio (OR) = 0.6, 95% confidence interval (CI) = 0.44-0.91; P < 0.0001, OR = 2.1, 95% CI = 1.44-2.96; and P = 0.019, OR = 0.6, 95% CI = 0.45-0.93, respectively]. The minor NKG2A c.338-90*G/*G, NKG2C102*Phe/*Phe, and NKG2D72*Thr/*Thr genotypes showed a risk of RA (P = 0.010, OR = 2.0, 95% CI = 1.17-3.54; P < 0.0001, OR = 0.2, 95% CI = 0.12-0.48; and P = 0.032, OR = 2.3, 95% CI = 1.05-5.01, respectively) compared with controls. No significance was observed between the inhibitory (NKG2A) or activating (NKG2C and NKG2D) receptor genotypes and the presence of RF, ANA, or bony erosions in RA.
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Affiliation(s)
- K S Park
- Department of Biology, Institute of Basic Science, Sungshin Women's University, Seoul, Korea.
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