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Zeis P, Lian M, Fan X, Herman JS, Hernandez DC, Gentek R, Elias S, Symowski C, Knöpper K, Peltokangas N, Friedrich C, Doucet-Ladeveze R, Kabat AM, Locksley RM, Voehringer D, Bajenoff M, Rudensky AY, Romagnani C, Grün D, Gasteiger G. In Situ Maturation and Tissue Adaptation of Type 2 Innate Lymphoid Cell Progenitors. Immunity 2020; 53:775-792.e9. [PMID: 33002412 PMCID: PMC7611573 DOI: 10.1016/j.immuni.2020.09.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 06/04/2020] [Accepted: 09/08/2020] [Indexed: 12/14/2022]
Abstract
Innate lymphoid cells (ILCs) are generated early during ontogeny and persist predominantly as tissue-resident cells. Here, we examined how ILCs are maintained and renewed within tissues. We generated a single cell atlas of lung ILC2s and found that Il18r1+ ILCs comprise circulating and tissue-resident ILC progenitors (ILCP) and effector-cells with heterogeneous expression of the transcription factors Tcf7 and Zbtb16, and CD103. Our analyses revealed a continuous differentiation trajectory from Il18r1+ ST2- ILCPs to Il18r- ST2+ ILC2s, which was experimentally validated. Upon helminth infection, recruited and BM-derived cells generated the entire spectrum of ILC2s in parabiotic and shield chimeric mice, consistent with their potential role in the renewal of tissue ILC2s. Our findings identify local ILCPs and reveal ILCP in situ differentiation and tissue adaptation as a mechanism of ILC maintenance and phenotypic diversification. Local niches, rather than progenitor origin, or the developmental window during ontogeny, may dominantly imprint ILC phenotypes in adult tissues.
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Affiliation(s)
- Patrice Zeis
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Mi Lian
- Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität Würzburg, Würzburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany; Institute of Medical Microbiology and Hygiene, University Medical Center Freiburg, Freiburg, Germany
| | - Xiying Fan
- Howard Hughes Medical Institute, Immunology Program, and Ludwig Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Josip S Herman
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Daniela C Hernandez
- German Rheumatism Research Center (DRFZ), Leibniz Association, Berlin, Germany; Medical Department I, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Rebecca Gentek
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Shlomo Elias
- Howard Hughes Medical Institute, Immunology Program, and Ludwig Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Cornelia Symowski
- Department of Infection Biology, University Hospital Erlangen and Friedrich-Alexander University Erlangen-Nuremberg (FAU), Erlangen, Germany
| | - Konrad Knöpper
- Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität Würzburg, Würzburg, Germany
| | - Nina Peltokangas
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Christin Friedrich
- Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität Würzburg, Würzburg, Germany; Institute of Medical Microbiology and Hygiene, University Medical Center Freiburg, Freiburg, Germany
| | - Remi Doucet-Ladeveze
- Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität Würzburg, Würzburg, Germany
| | - Agnieszka M Kabat
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Richard M Locksley
- Howard Hughes Medical Institute and Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - David Voehringer
- Department of Infection Biology, University Hospital Erlangen and Friedrich-Alexander University Erlangen-Nuremberg (FAU), Erlangen, Germany
| | - Marc Bajenoff
- Aix Marseille Université, CNRS, INSERM, CIML, Marseille, France
| | - Alexander Y Rudensky
- Howard Hughes Medical Institute, Immunology Program, and Ludwig Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Chiara Romagnani
- German Rheumatism Research Center (DRFZ), Leibniz Association, Berlin, Germany; Medical Department I, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Dominic Grün
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; CIBSS-Centre for Integrative Biological Signaling Studies, University of Freiburg, Freiburg, Germany.
| | - Georg Gasteiger
- Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität Würzburg, Würzburg, Germany; Institute of Medical Microbiology and Hygiene, University Medical Center Freiburg, Freiburg, Germany.
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Nozaki Y, Ri J, Sakai K, Niki K, Kinoshita K, Funauchi M, Matsumura I. Inhibition of the IL-18 Receptor Signaling Pathway Ameliorates Disease in a Murine Model of Rheumatoid Arthritis. Cells 2019; 9:cells9010011. [PMID: 31861496 PMCID: PMC7017073 DOI: 10.3390/cells9010011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 12/11/2022] Open
Abstract
Interleukin (IL)-18 expression in synovial tissue correlates with the severity of joint inflammation and the levels of pro-inflammatory cytokines. However, the role of the IL-18/IL-18 receptor-alpha (Rα) signaling pathway in autoimmune arthritis is unknown. Wild-type (WT) and IL-18Rα knockout (KO) mice were immunized with bovine type II collagen before the onset of arthritis induced by lipopolysaccharide injection. Disease activity was evaluated by semiquantitative scoring and histologic assessment. Serum inflammatory cytokine and anticollagen antibody levels were quantified by an enzyme-linked immunosorbent assay. Joint cytokine and matrix metalloproteinases-3 levels were determined by a quantitative polymerase chain reaction. Splenic suppressors of cytokine signaling (SOCS) were determined by Western blot analysis as indices of systemic immunoresponse. IL-18Rα KO mice showed lower arthritis and histological scores in bone erosion and synovitis due to reductions in the infiltration of CD4+ T cells and F4/80+ cells and decreased serum IL-6, -18, TNF, and IFN-γ levels. The mRNA expression and protein levels of SOCS3 were significantly increased in the IL-18Rα KO mice. By an up-regulation of SOCS, pro-inflammatory cytokines were decreased through the IL-18/IL-18Rα signaling pathway. These results suggest that inhibitors of the IL-18/IL-18Rα signaling pathway could become new therapeutic agents for rheumatoid arthritis.
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Wu Z, Giudice V, Chen J, Sun W, Lin Z, Keyvanfar K, Talasani N, Kajigaya S, Feng X, Young NS. Interleukin-18 plays a dispensable role in murine and likely also human bone marrow failure. Exp Hematol 2018; 69:54-64.e2. [PMID: 30316805 DOI: 10.1016/j.exphem.2018.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 01/11/2023]
Abstract
Interleukin-18 (IL-18), also known as interferon-gamma (IFN-γ)-inducing factor, is involved in Th1 responses and regulation of immunity. Accumulating evidence implicates IL-18 in autoimmune diseases, but little is known of its role in acquired aplastic anemia (AA), the immune-mediated destruction of bone marrow (BM) hematopoietic stem and progenitor cells (HSPCs). IL-18 protein levels were significantly elevated in sera of severe AA (SAA) patients, including both responders and nonresponders assayed before treatment, and decreased after treatment. IL-18 receptor (IL-18R) was expressed on HSPCs. Co-culture of human BM CD34+ cells from healthy donors with IL-18 upregulated genes in the helper T-cell and Notch signaling pathways and downregulated genes in the cell cycle regulation, telomerase, and IL-6 signaling pathways. Plasma IL-18 levels were also elevated in murine models of immune-mediated BM failure. However, deletion of IL-18 in donor lymph node cells or deletions of either IL-18 or IL-18R in recipients did not attenuate elevations of circulating IFN-γ, tumor necrosis factor-alpha, or IL-6, nor did they alleviate BM failure. In summary, our findings suggest that, although increased circulating IL-18 is a feature of SAA, it may reflect an aberrant immune response but be dispensable to the pathogenesis of AA.
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Affiliation(s)
- Zhijie Wu
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Valentina Giudice
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jichun Chen
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Wanling Sun
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Zenghua Lin
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Keyvan Keyvanfar
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Nidhi Talasani
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sachiko Kajigaya
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Xingmin Feng
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Neal S Young
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
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Robuffo I, Toniato E, Tettamanti L, Mastrangelo F, Ronconi G, Frydas I, Caraffa A, Kritas SK, Conti P. Mast cell in innate immunity mediated by proinflammatory and antiinflammatory IL-1 family members. J BIOL REG HOMEOS AG 2017; 31:837-842. [PMID: 29254286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Innate immunity consists of physical and chemical barriers which provide the early defense against infections. Innate immunity orchestrates the defense of the host with cellular and biochemical proteins. Mast cells (MCs) are involved in innate and adaptive immunity and are the first line of defense which generates multiple inflammatory cytokines/chemokines in response to numerous antigens. MC-activated antigen receptor Fc-RI provokes a number of important biochemical pathways with secretion of numerous vasoactive, chemoattractant and inflammatory compounds which participate in allergic and inflammatory diseases. MCs can also be activated by Th1 cytokines and generate pre-formed and de novo inflammatory mediators, including TNF. IL-37 is an anti-inflammatory cytokine which binds IL-18R-alpha chain and reduces the production of inflammatory IL-1 family members. IL-37 down-regulates innate immunity by inhibiting macrophage response and its accumulation and reduces the cytokines that mediate inflammatory diseases. Here, we discuss the relationship between MCs, innate immunity, and pro-inflammatory and anti-inflammatory cytokines.
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Affiliation(s)
- I Robuffo
- Institute of Molecular Genetics, CNR, Sede di Chieti, Italy
| | - E Toniato
- Department of Medical, Oral and Biotechnologic Sciences, G. Dannunzio University, Chieti, Italy
| | - L Tettamanti
- Department of Medical and Morphological Science, University of Insubria, Varese, Italy
| | - F Mastrangelo
- Department of Medical Science and Biotechnology, University of Foggia, Foggia, Italy
| | - G Ronconi
- UOS Clinica dei Pazienti del Territorio, Policlinico Gemelli, Rome, Italy
| | - I Frydas
- Faculty of Parasitology, Aristotle University of Thessaloniki, Macedonia, Greece
| | - Al Caraffa
- Department of Pharmacology, University of Perugia, Perugia, Italy
| | - S K Kritas
- Department of Microbiology and Infectious Diseases, School of Veterinary Medicine, Aristotle University of Thessaloniki, Macedonia, Greece
| | - P Conti
- Immunology Division, Postgraduate Medical School, University of Chieti, Chieti, Italy
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Wang E, Chong K, Yu M, Akhoundsadegh N, Granville DJ, Shapiro J, McElwee KJ. Development of autoimmune hair loss disease alopecia areata is associated with cardiac dysfunction in C3H/HeJ mice. PLoS One 2013; 8:e62935. [PMID: 23658656 PMCID: PMC3637254 DOI: 10.1371/journal.pone.0062935] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 03/26/2013] [Indexed: 02/08/2023] Open
Abstract
Alopecia areata (AA) is a chronic autoimmune hair loss disease that affects several million men, women and children worldwide. Previous studies have suggested a link between autoimmunity, stress hormones, and increased cardiovascular disease risk. In the current study, histology, immunohistology, quantitative PCR (qPCR) and ELISAs were used to assess heart health in the C3H/HeJ mouse model for AA and heart tissue response to adrenocorticotropic hormone (ACTH) exposure. Mice with AA exhibited both atrial and ventricular hypertrophy, and increased collagen deposition compared to normal-haired littermates. QPCR revealed significant increases in Il18 (4.6-fold), IL18 receptor-1 (Il18r1; 2.8-fold) and IL18 binding protein (Il18bp; 5.2-fold) in AA hearts. Time course studies revealed a trend towards decreased Il18 in acute AA compared to controls while Il18r1, Il18bp and Casp1 showed similar trends to those of chronic AA affected mice. Immunohistochemistry showed localization of IL18 in chronic AA mouse atria. ELISA indicated cardiac troponin-I (cTnI) was elevated in the serum and significantly increased in AA heart tissue. Cultures of heart atria revealed differential gene expression between AA and control mice in response to ACTH. ACTH treatment induced significant increase in cTnI release into the culture medium in a dose-dependent manner for both AA and control mice. In conclusion, murine AA is associated with structural, biochemical, and gene expression changes consistent with cardiac hypertrophy in response to ACTH exposure.
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Affiliation(s)
- Eddy Wang
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - Katy Chong
- University of British Columbia, Vancouver, BC, Canada
| | - Mei Yu
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - Noushin Akhoundsadegh
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - David J. Granville
- Department of Pathology and Laboratory Medicine, James Hogg Research Centre, Institute for Heart and Lung Health, University of British Columbia, Vancouver, BC, Canada
| | - Jerry Shapiro
- Department of Dermatology and Skin Science, Vancouver General Hospital, Vancouver, BC, Canada
| | - Kevin J. McElwee
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
- * E-mail:
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Mutamba S, Allison A, Mahida Y, Barrow P, Foster N. Expression of IL-1Rrp2 by human myelomonocytic cells is unique to DCs and facilitates DC maturation by IL-1F8 and IL-1F9. Eur J Immunol 2012; 42:607-17. [PMID: 22144259 DOI: 10.1002/eji.201142035] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report for the first time that expression of the novel IL-1 cytokine receptor IL-1Rrp2 (IL-1R6) is unique to DCs within the human myelomonocytic lineage. IL-1Rrp2 was expressed by monocyte-derived dendritic cells (MDDCs) which was dose-dependently increased by IL-4 and correlated with increased numbers of differentiated MDDCs. Human plasmacytoid DCs also express IL-1Rrp2 but the receptor is not expressed by either myeloid DC type 1 (mDC1) or mDC2 cells. We also show that IL-1F8 or IL-1F9 cytokines, which signal through IL-1Rrp2, induce maturation of MDDCs, as measured by increased expression of HLA-DR and CD83 and decreased expression of CD1a. Furthermore, IL-1F8 stimulated increased CD40 and CD80 expression and IL-18 and IL-12 p70 production by MDDCs, which induced proliferation of IFN-γ-producing CD3(+) lymphocytes (indicative of inflammatory Th1 subsets). IL-1F8 and IL-1F2 were equipotent in their ability to stimulate IL-18 secretion from MDDCs but IL-1F8 was not as potent as IL-1F2 in stimulating secretion of IL-12p70 from MDDCs or inducing lymphocyte proliferation Therefore, IL-1Rrp2 expression by some DC subsets may have an important function in the human immune response in vivo via its role in differentiation of inflammatory Th1 lymphocytes.
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Affiliation(s)
- Shilla Mutamba
- School of Veterinary Medicine and Science, University of Nottingham, UK
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Ingram JT, Yi JS, Zajac AJ. Exhausted CD8 T cells downregulate the IL-18 receptor and become unresponsive to inflammatory cytokines and bacterial co-infections. PLoS Pathog 2011; 7:e1002273. [PMID: 21980291 PMCID: PMC3182940 DOI: 10.1371/journal.ppat.1002273] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 08/01/2011] [Indexed: 12/11/2022] Open
Abstract
During many chronic infections virus-specific CD8 T cells succumb to exhaustion as they lose their ability to respond to antigenic activation. Combinations of IL-12, IL-18, and IL-21 have been shown to induce the antigen-independent production of interferon (IFN)-γ by effector and memory CD8 T cells. In this study we investigated whether exhausted CD8 T cells are sensitive to activation by these cytokines. We show that effector and memory, but not exhausted, CD8 T cells produce IFN-γ and upregulate CD25 following exposure to certain combinations of IL-12, IL-18, and IL-21. The unresponsiveness of exhausted CD8 T cells is associated with downregulation of the IL-18-receptor-α (IL-18Rα). Although IL-18Rα expression is connected with the ability of memory CD8 T cells to self-renew and efflux rhodamine 123, the IL-18Rαlo exhausted cells remained capable of secreting this dye. To further evaluate the consequences of IL-18Rα downregulation, we tracked the fate of IL-18Rα-deficient CD8 T cells in chronically infected mixed bone marrow chimeras and discovered that IL-18Rα affects the initial but not later phases of the response. The antigen-independent responsiveness of exhausted CD8 T cells was also investigated following co-infection with Listeria monocytogenes, which induces the expression of IL-12 and IL-18. Although IL-18Rαhi memory cells upregulated CD25 and produced IFN-γ, the IL-18Rαlo exhausted cells failed to respond. Collectively, these findings indicate that as exhausted T cells adjust to the chronically infected environment, they lose their susceptibility to antigen-independent activation by cytokines, which compromises their ability to detect bacterial co-infections. Ongoing viral infections can corrupt the immune defense system. One way in which this occurs is by the induction of exhaustion in the host's anti-viral CD8 T cells, a key component of the immune response. Investigating the causes and consequences of T cell exhaustion will likely provide insights into potential strategies for improving immunity to ongoing infections. In addition, there is an increasing interest in determining how underlying chronic infections broadly impact immune responses to new infections. In this study we demonstrate that exhausted anti-viral T cells downregulate the receptor for the immune system factor IL-18. This downregulation is consequential as it prevents the function of exhausted cells from being rescued by certain combinations of immune system factors, cytokines, which potently activate conventional, highly protective responses. Moreover, the loss of this receptor disfavors the accumulation of anti-viral CD8 T cells during the initial phase of the response. We also show that whereas conventional anti-viral CD8 T cells can sense a bacterial co-infection that induces IL-12 and IL-18 production, the exhausted cells fail to respond. Collectively, these studies reveal how components of the immune defense system become recalibrated during an ongoing infection, altering their ability to respond to certain new infections.
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Affiliation(s)
- Jennifer T. Ingram
- Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - John S. Yi
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Allan J. Zajac
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Lopez Roa RI, Guerrero Velásquez C, Alvarado Navarro A, Montoya Buelna M, Garcia Niebla C, Fafutis Morris M. Recovery of IFN-gamma levels in PBMCs from lepromatous leprosy patients through the synergistic actions of the cytokines IL-12 and IL-18. Int Immunopharmacol 2008; 8:1715-20. [PMID: 18708162 DOI: 10.1016/j.intimp.2008.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 06/29/2008] [Accepted: 07/15/2008] [Indexed: 12/15/2022]
Abstract
The shift to the production of a Th1 cytokine profile during an intracellular infection has been shown to depend on antigen presenting cells-derived IL-12 and T-cell-derived IFN-gamma production. IL-18 facilitates Th1 priming in synergy with IL-12 through the stimulation of IFN-gamma production by T cells, B cells, NK cells, macrophages and DCs. A low level of IFN-gamma production in PBMC cultures from lepromatous leprosy patients (LL) has been previously reported by several groups. We evaluated the synthesis of this cytokine after exogenous addition of recombinant IL-12 and IL-18 (IL12/IL18) in order to induce recovery of the IFN-gamma levels with Mycobacterium leprae antigenic stimulation. The aim of this study was to investigate if exogenous addition of IL12/IL18 to PBMC cell cultures in the presence of M. leprae antigens could induce recovery of IFN-gamma levels. We found that IFN-gamma levels in PBMCs cultured from LL patients were reestablished after exogenous addition of exogenous IL12/IL18 and we also observed a diminished IL-18R expression. Although the molecular mechanisms of IL12/IL18 synergy have not been clearly elucidated, we assume that recombinant cytokines can activate several transcription factors that induce IFN-gamma synthesis.
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MESH Headings
- Adjuvants, Immunologic/pharmacology
- Adult
- Aged
- Antigens, CD/drug effects
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/drug effects
- Antigens, Differentiation, T-Lymphocyte/immunology
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Cell Proliferation/drug effects
- Cells, Cultured
- Drug Synergism
- Female
- Humans
- Interferon-gamma/biosynthesis
- Interferon-gamma/drug effects
- Interleukin-12/pharmacology
- Interleukin-18/pharmacology
- Interleukin-18 Receptor alpha Subunit/drug effects
- Interleukin-18 Receptor alpha Subunit/immunology
- Interleukin-18 Receptor alpha Subunit/metabolism
- Lectins, C-Type
- Leprosy, Lepromatous/immunology
- Leprosy, Lepromatous/microbiology
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/microbiology
- Male
- Middle Aged
- Mitogens/pharmacology
- Mycobacterium leprae/immunology
- Phytohemagglutinins/pharmacology
- Recombinant Proteins/pharmacology
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Affiliation(s)
- Rocio Ivette Lopez Roa
- Centro de Investigación en Inmunologia y Dermatología, Instituto Dermatológico de Jalisco, Departamento de Fisiología, CUCS, Universidad de Guadalajara, Mexico
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9
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Ho LH, Ohno T, Oboki K, Kajiwara N, Suto H, Iikura M, Okayama Y, Akira S, Saito H, Galli SJ, Nakae S. IL-33 induces IL-13 production by mouse mast cells independently of IgE-FcepsilonRI signals. J Leukoc Biol 2007; 82:1481-90. [PMID: 17881510 DOI: 10.1189/jlb.0407200] [Citation(s) in RCA: 235] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The IL-1-related molecules, IL-1 and IL-18, can promote Th2 cytokine production by IgE/antigen-FcepsilonRI-stimulated mouse mast cells. Another IL-1-related molecule, IL-33, was identified recently as a ligand for T1/ST2. Although mouse mast cells constitutively express ST2, the effects of IL-33 on mast cell function are poorly understood. We found that IL-33, but not IL-1beta or IL-18, induced IL-13 and IL-6 production by mouse bone marrow-derived, cultured mast cells (BMCMCs) independently of IgE. In BMCMCs incubated with the potently cytokinergic SPE-7 IgE without specific antigen, IL-33, IL-1beta, and IL-18 each promoted IL-13 and IL-6 production, but the effects of IL-33 were more potent than those of IL-1beta or IL-18. IL-33 promoted cytokine production via a MyD88-dependent but Toll/IL-1R domain-containing adaptor-inducing IFN-beta-independent pathway. By contrast, IL-33 neither induced nor enhanced mast cell degranulation. At 200 ng/ml, IL-33 prolonged mast cell survival in the absence of IgE and impaired survival in the presence of SPE-7 IgE, whereas at 100 ng/ml, IL-33 had no effect on mast cell survival in the absence of IgE and reduced mast cell survival in the presence of IgE. These observations suggest potential roles for IL-33 in mast cell- and Th2 cytokine-associated immune responses and disorders.
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Affiliation(s)
- Lien H Ho
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305-5324, USA
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10
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French AR, Holroyd EB, Yang L, Kim S, Yokoyama WM. IL-18 acts synergistically with IL-15 in stimulating natural killer cell proliferation. Cytokine 2006; 35:229-34. [PMID: 17052916 DOI: 10.1016/j.cyto.2006.08.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2006] [Revised: 07/29/2006] [Accepted: 08/21/2006] [Indexed: 10/24/2022]
Abstract
Mature natural killer (NK) cells are able to vigorously proliferate in response to infectious stimuli such as viral infections. The factors driving NK cell proliferation under these circumstances are only beginning to be characterized. NK cells constitutively express interleukin-18 receptor alpha and are stimulated by IL-18 to produce IFNgamma. Although IL-18 alone is not sufficient to drive NK cell proliferation, we demonstrate that IL-18 is able to act synergistically with IL-15 in stimulating in vitro NK cell proliferation. Furthermore using a NK cell line, we show that this effect occurs through direct stimulation of NK cells by IL-18 rather than through a secondary signal generated by an intermediary cell type. This raises the possibility that IL-18 may act synergistically with IL-15 in driving pathogen-induced NK cell proliferation in addition to its contribution in enhancing IL-12 stimulation of NK cell IFNgamma production.
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Affiliation(s)
- Anthony R French
- Division of Pediatric Rheumatology, Department of Pediatrics, Washington University School of Medicine, Box 8208, 660 South Euclid Ave., St. Louis, MO 63110, USA.
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