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Pandit H, Valentin A, Angel M, Deleage C, Bergamaschi C, Bear J, Sowder R, Felber BK, Pavlakis GN. Step-dose IL-7 treatment promotes systemic expansion of T cells and alters immune cell landscape in blood and lymph nodes. iScience 2023; 26:105929. [PMID: 36685042 PMCID: PMC9852696 DOI: 10.1016/j.isci.2023.105929] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 11/06/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023] Open
Abstract
We employed a dose-escalation regimen in rhesus macaques to deliver glycosylated IL-7, a cytokine critical for development and maintenance of T lymphocytes. IL-7 increased proliferation and survival of T cells and triggered several chemokines and cytokines. Induction of CXCL13 in lymph nodes (LNs) led to a remarkable increase of B cells in the LNs, proliferation of germinal center follicular T helper cells and elevated IL-21 levels suggesting an increase in follicle activity. Transcriptomics analysis showed induction of IRF-7 and Flt3L, which was linked to increased frequency of circulating plasmacytoid dendritic cells (pDCs) on IL-7 treatment. These pDCs expressed higher levels of CCR7, homed to LNs, and were associated with upregulation of type-1 interferon gene signature and increased production of IFN-α2a on TLR stimulation. Superior effects and dose-sparing advantage was observed by the step-dose regimen. Thus, IL-7 treatment leads to systemic effects involving both lymphoid and myeloid compartments.
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Affiliation(s)
- Hrishikesh Pandit
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Antonio Valentin
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Matthew Angel
- Vaccine Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
- Center for Cancer Research Collaborative Bioinformatics Resource, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Claire Deleage
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA
| | - Cristina Bergamaschi
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Jenifer Bear
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Raymond Sowder
- AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA
| | - Barbara K. Felber
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - George N. Pavlakis
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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Zhai Y, Zhao Y, Zhang Y, He J, Tang M, Liu Y, Yang G, Xue P, Yao Y, He M, Xu Y, Qu W, Zhang Y. Lead suppresses interferon γ to induce splenomegaly via modification on splenic endothelial cells and lymphoid tissue organizer cells in mice. Ecotoxicol Environ Saf 2022; 244:114046. [PMID: 36057201 DOI: 10.1016/j.ecoenv.2022.114046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 08/21/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
Splenomegaly is a symptom characterized by the presence of an enlarged spleen. The impact of environmental factors on splenomegaly is largely unknown. In this study, C57BL/6 mice were treated with 125 ppm or 1250 ppm lead (Pb) via drinking water for 8 wk, and the process of splenomegaly was evaluated. Treatment with 1250 ppm Pb, but not 125 ppm Pb, caused splenomegaly, which was associated with increased capacity for erythrocyte clearance. Intriguingly, Pb-caused splenomegaly was independent of lymphoid tissue inducer (LTi) cells, which produce lymphotoxins α and β (LTα/β) to activate endothelial cells and LT organizer (LTo) cells and drive the development of spleen physiologically. A direct action of Pb on endothelial cells and LTo cells did not impact their proliferation. On the other hand, during steady state, a tonic level of interferon (IFN)γ acted on endothelial cells and LTo cells to suppress splenomegaly, as IFNγ receptor (IFNγR)-deficient mice had enlarged spleens relative to wild-type mice; during Pb exposure, splenic IFNγ production was suppressed, thus leading to a loss of the inhibitory effect of IFNγ on splenomegaly. Mechanically, Pb acted on splenic CD4+ T cells to suppress IFNγ production, which impaired the Janus kinase (Jak)1/ signal transducer and activator of transcription (STAT)1 signaling in endothelial cells and LTo cells; the weakened Jak1/STAT1 signaling resulted in the enhanced nuclear factor-κB (NF-κB) signaling in endothelial cells and LTo cells, which drove their proliferation and caused splenomegaly. The present study reveals a previously unrecognized mechanism for the immunotoxicity of Pb, which may extend our current understanding for Pb toxicology.
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Affiliation(s)
- Yue Zhai
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yifan Zhao
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yufan Zhang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Jinyi He
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Mengke Tang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yalin Liu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Guangrui Yang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Peng Xue
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Ye Yao
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Miao He
- State Key Laboratory of Medical Neurobiology, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Yanyi Xu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Weidong Qu
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yubin Zhang
- School of Public Health and Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China.
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Sheikh A, Jackson J, Shim HB, Yau C, Seo JH, Abraham N. Selective dependence on IL-7 for antigen-specific CD8 T cell responses during airway influenza infection. Sci Rep 2022; 12:135. [PMID: 34997007 PMCID: PMC8741933 DOI: 10.1038/s41598-021-03936-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 12/06/2021] [Indexed: 11/08/2022] Open
Abstract
Interleukin-7 (IL-7) is a cytokine known for its importance in T cell development and survival. How IL-7 shapes CD8 T cell responses during an acute viral infection is less understood. We had previously shown that IL-7 signaling deficient mice have reduced accumulation of influenza-specific CD8 T cells following influenza infection. We sought to determine whether IL-7 affects early CD8 T cell expansion in the mediastinal lymph node and effector function in the lungs. Using IL-7Rα signaling deficient mice, we show that IL-7 is required for a normal sized mediastinal lymph node and the early clonal expansion of influenza-specific CD8 T cells therein. We show that IL-7 plays a cell-intrinsic role in the accumulation of NP366-374 and PA224-233-specific CD8 T cells in the lymph node. We also found that IL-7 shapes terminal differentiation, degranulation and cytokine production to a greater extent in PA224-233-specific than NP366-374-specific CD8 T cells. We further demonstrate that IL-7 is induced in the lung tissue by viral infection and we characterize multiple cellular sources that contribute to IL-7 production. Our findings on IL-7 and its effects on lower respiratory diseases will be important for expanding the utility of therapeutics that are currently available.
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Affiliation(s)
- Abdalla Sheikh
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
| | - Jennie Jackson
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
| | - Hanjoo Brian Shim
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Clement Yau
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
- Duke-NUS Medical School, 8 College Road, Singapore, Singapore
| | - Jung Hee Seo
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
| | - Ninan Abraham
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.
- Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada.
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada.
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Bresler P, Tejerina E, Jacob JM, Legrand A, Quellec V, Ezine S, Peduto L, Cherrier M. T cells regulate lymph node-resident ILC populations in a tissue and subset-specific way. iScience 2021; 24:102158. [PMID: 33665576 PMCID: PMC7907429 DOI: 10.1016/j.isci.2021.102158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 12/15/2020] [Accepted: 02/03/2021] [Indexed: 12/16/2022] Open
Abstract
Innate lymphoid cells (ILCs) have been shown to be significantly affected in the small intestine lamina propria and secondary lymphoid organs (SLOs) of conventional lymphopenic mice. How ILCs are regulated by adaptive immunity in SLOs remains unclear. In T cell-deficient mice, ILC2s are significantly increased in the mesenteric lymph nodes (MLNs) at the expense of CCR6+ ILC3s, which are nonetheless increased in the peripheral lymph nodes (PLNs). Here, we show that T cells regulate lymph node-resident ILCs in a tissue- and subset-specific way. First, reducing microbial colonization from birth restored CCR6+ ILC3s in the MLNs of T cell-deficient mice. In contrast, T cell reconstitution resulted in the contraction of both MLNs ILC2s and PLNs ILC3s, whereas antagonizing microbial colonization from birth had no impact on these populations. Finally, the accumulation of MLNs ILC2s was partly regulated by T cells through stroma-derived IL-33.
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Affiliation(s)
- Priscillia Bresler
- Institut Necker Enfants Malades, Université Paris Descartes, INSERM U1151, CNRS UMR 8253, Faculté de Médecine Necker, 156 rue de Vaugirard, 75015 Paris, France
| | - Emmanuel Tejerina
- Institut Necker Enfants Malades, Université Paris Descartes, INSERM U1151, CNRS UMR 8253, Faculté de Médecine Necker, 156 rue de Vaugirard, 75015 Paris, France
| | - Jean Marie Jacob
- Stroma, Inflammation & Tissue Repair Unit, Institut Pasteur, Inserm U1224, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Agnès Legrand
- Institut Necker Enfants Malades, Université Paris Descartes, INSERM U1151, CNRS UMR 8253, Faculté de Médecine Necker, 156 rue de Vaugirard, 75015 Paris, France
| | - Véronique Quellec
- Institut Necker Enfants Malades, Université Paris Descartes, INSERM U1151, CNRS UMR 8253, Faculté de Médecine Necker, 156 rue de Vaugirard, 75015 Paris, France
| | - Sophie Ezine
- Institut Necker Enfants Malades, Université Paris Descartes, INSERM U1151, CNRS UMR 8253, Faculté de Médecine Necker, 156 rue de Vaugirard, 75015 Paris, France
| | - Lucie Peduto
- Stroma, Inflammation & Tissue Repair Unit, Institut Pasteur, Inserm U1224, Paris, France
| | - Marie Cherrier
- Institut Imagine, Université Paris Descartes, INSERM U1163, Laboratory of Intestinal Immunity, 24 Boulevard du Montparnasse, 75015 Paris, France
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Wang W, Li Y, Hao J, He Y, Dong X, Fu YX, Guo X. The Interaction between Lymphoid Tissue Inducer-Like Cells and T Cells in the Mesenteric Lymph Node Restrains Intestinal Humoral Immunity. Cell Rep 2020; 32:107936. [DOI: 10.1016/j.celrep.2020.107936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/27/2020] [Accepted: 06/29/2020] [Indexed: 01/07/2023] Open
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Eken A, Cansever M, Okus FZ, Erdem S, Nain E, Azizoglu ZB, Haliloglu Y, Karakukcu M, Ozcan A, Devecioglu O, Aksu G, Arikan Ayyildiz Z, Topal E, Karakoc Aydiner E, Kiykim A, Metin A, Cipe F, Kaya A, Artac H, Reisli I, Guner SN, Uygun V, Karasu G, Dönmez Altuntas H, Canatan H, Oukka M, Ozen A, Chatila TA, Keles S, Baris S, Unal E, Patiroglu T. ILC3 deficiency and generalized ILC abnormalities in DOCK8-deficient patients. Allergy 2020; 75:921-932. [PMID: 31596517 DOI: 10.1111/all.14081] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 09/10/2019] [Accepted: 09/20/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Dedicator of cytokinesis 8 (DOCK8) deficiency is the main cause of the autosomal recessive hyper-IgE syndrome (HIES). We previously reported the selective loss of group 3 innate lymphoid cell (ILC) number and function in a Dock8-deficient mouse model. In this study, we sought to test whether DOCK8 is required for the function and maintenance of ILC subsets in humans. METHODS Peripheral blood ILC1-3 subsets of 16 DOCK8-deficient patients recruited at the pretransplant stage, and seven patients with autosomal dominant (AD) HIES due to STAT3 mutations, were compared with those of healthy controls or post-transplant DOCK8-deficient patients (n = 12) by flow cytometry and real-time qPCR. Sorted total ILCs from DOCK8- or STAT3-mutant patients and healthy controls were assayed for survival, apoptosis, proliferation, and activation by IL-7, IL-23, and IL-12 by cell culture, flow cytometry, and phospho-flow assays. RESULTS DOCK8-deficient but not STAT3-mutant patients exhibited a profound depletion of ILC3s, and to a lesser extent ILC2s, in their peripheral blood. DOCK8-deficient ILC1-3 subsets had defective proliferation, expressed lower levels of IL-7R, responded less to IL-7, IL-12, or IL-23 cytokines, and were more prone to apoptosis compared with those of healthy controls. CONCLUSION DOCK8 regulates human ILC3 expansion and survival, and more globally ILC cytokine signaling and proliferation. DOCK8 deficiency leads to loss of ILC3 from peripheral blood. ILC3 deficiency may contribute to the susceptibility of DOCK8-deficient patients to infections.
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Yamaguchi K, Ito M, Ohmura H, Hanamura F, Nakano M, Tsuchihashi K, Nagai S, Ariyama H, Kusaba H, Yamamoto H, Oda Y, Nakamura M, Akashi K, Baba E. Helper T cell-dominant tertiary lymphoid structures are associated with disease relapse of advanced colorectal cancer. Oncoimmunology 2020; 9:1724763. [PMID: 32117589 PMCID: PMC7028340 DOI: 10.1080/2162402x.2020.1724763] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/06/2019] [Accepted: 12/04/2019] [Indexed: 02/08/2023] Open
Abstract
Tertiary lymphoid structures (TLSs), clusters of immune cells found around tumor tissue, have been shown to be associated with anti-tumor immunity, but the cellular composition within each TLS and whether the cellular composition of a TLS affects a patient’s prognosis are poorly understood. In the present study, each TLS was categorized according to its cellular composition determined by a system of multiplex immunohistochemical staining and quantitative analysis, and the correlation between the category and prognosis was examined. Sixty-seven patients with curatively resected stage II/III colorectal cancer (CRC) were enrolled. A TLS, consisting of germinal center B cells, follicular dendritic cells, T helper (Th) cells, B cells, cytotoxic T cells, and macrophages, was confirmed in the tumor tissue of 58 patients (87%). The densities of Th cells and macrophages were significantly higher in relapsed patients than in not-relapsed patients (p = .043 and p = .0076). A higher ratio of Th cells was the most significant independent risk factor for disease relapse on multivariate analysis. The subset increasing in Th cells was GATA3+ Th2. A total of 353 TLSs was divided into five clusters according to immune cell composition. Among them, the Th-rich type TLS was significantly increased (p = .0009) in relapsed patients. These data suggest the possibility that Th cell-dominant composition might disturb the anti-tumor immune response, and the function of each TLS might differ depending on its composition.
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Affiliation(s)
- Kyoko Yamaguchi
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Mamoru Ito
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hirofumi Ohmura
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Fumiyasu Hanamura
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Michitaka Nakano
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kenji Tsuchihashi
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shuntaro Nagai
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroshi Ariyama
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hitoshi Kusaba
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Nakamura
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eishi Baba
- Department of Oncology and Social Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Abstract
Tertiary lymphoid organs (TLOs), also known as inducible lymphoid organs, tertiary lymphoid structures, tertiary lymphoid tissues, or ectopic lymphoid organs are accumulations of cells in chronic inflammation that have been observed in most tissues in autoimmunity, infection, and cancer in mouse and man. They share many properties with secondary lymphoid organs (SLOs), particularly lymph nodes, with regard to cellular composition, function, and regulation. TLOs include T and B cells, dendritic cells, follicular dendritic cells, and many other stromal cells, and high endothelial venules (HEVs) and lymphatic vessels. They serve as sites of antigen presentation and tolerance induction; they are harmful in autoimmunity and can be both harmful and beneficial in cancer. SLO induction in ontogeny is mediated by interactions of several cell types, including CD4+ CD3- lymphoid tissue inducer (LTi) RORγt+ cells that express LTαβ and interact with mesenchymal lymphoid tissue organizer (LTo) FAP+ cells in the presence of lymphatic and blood vessels. A variety of inducer cells initiate TLOs, including bona fide LTi cells, T cells, B cells, and NK cells. The mesenchymal organizer cells are less well characterized but can include FAP+ cells. Current challenges include identification of methods to inhibit TLOs in autoimmunity without affecting SLOs, and enhancement of TLOs for defense against tumors.
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Affiliation(s)
- Nancy H Ruddle
- Epidemiology of Microbial Diseases, Yale School of Public Health, 60 College St., New Haven, CT, 06510, USA.
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Sonnenberg GF, Hepworth MR. Functional interactions between innate lymphoid cells and adaptive immunity. Nat Rev Immunol 2019; 19:599-613. [PMID: 31350531 DOI: 10.1038/s41577-019-0194-8] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2019] [Indexed: 12/19/2022]
Abstract
Innate lymphoid cells (ILCs) are enriched at barrier surfaces of the mammalian body where they rapidly respond to host, microbial or environmental stimuli to promote immunity or tissue homeostasis. Furthermore, ILCs are dysregulated in multiple human diseases. Over the past decade, substantial advances have been made in identifying the heterogeneity and functional diversity of ILCs, which have revealed striking similarities to T cell subsets. However, emerging evidence indicates that ILCs also have a complex role in directly influencing the adaptive immune response in the context of development, homeostasis, infection or inflammation. In turn, adaptive immunity reciprocally regulates ILCs, which indicates that these interactions are a crucial determinant of immune responses within tissues. Here, we summarize our current understanding of functional interactions between ILCs and the adaptive immune system, discuss limitations and future areas of investigation, and consider the potential for these interactions to be therapeutically harnessed to benefit human health.
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Wenink MH, Leijten EFA, Cupedo T, Radstake TRDJ. Review: Innate Lymphoid Cells: Sparking Inflammatory Rheumatic Disease? Arthritis Rheumatol 2019; 69:885-897. [PMID: 28217945 DOI: 10.1002/art.40068] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 02/07/2017] [Indexed: 02/06/2023]
Affiliation(s)
| | | | - Tom Cupedo
- Erasmus University Medical Center, Rotterdam, The Netherlands
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Schropp V, Rohde J, Rovituso DM, Jabari S, Bharti R, Kuerten S. Contribution of LTi and T H17 cells to B cell aggregate formation in the central nervous system in a mouse model of multiple sclerosis. J Neuroinflammation 2019; 16:111. [PMID: 31138214 PMCID: PMC6540524 DOI: 10.1186/s12974-019-1500-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 05/06/2019] [Indexed: 01/26/2023] Open
Abstract
Background In a subgroup of patients suffering from progressive multiple sclerosis (MS), which is an inflammation-mediated neurodegenerative disease of the central nervous system (CNS), B cell aggregates were discovered within the meninges. Occurrence of these structures was associated with a more severe disease course and cortical histopathology. We have developed the B cell-dependent MP4-induced experimental autoimmune encephalomyelitis (EAE) as a mouse model to mimic this trait of the human disease. The aim of this study was to determine a potential role of lymphoid tissue inducer (LTi) and TH17 cells in the process of B cell aggregate formation in the MP4 model. Methods We performed flow cytometry of cerebellar and splenic tissue of MP4-immunized mice in the acute and chronic stage of the disease to analyze the presence of CD3−CD5−CD4+RORγt+ LTi and CD3+CD5+CD4+RORγt+ TH17 cells. Myelin oligodendrocyte glycoprotein (MOG):35–55-induced EAE was used as B cell-independent control model. We further determined the gene expression profile of B cell aggregates using laser capture microdissection, followed by RNA sequencing. Results While we were able to detect LTi cells in the embryonic spleen and adult intestine, which served as positive controls, there was no evidence for the existence of such a population in acute or chronic EAE in neither of the two models. Yet, we detected CD3−CD5−CD4−RORγt+ innate lymphoid cells (ILCs) and TH17 cells in the CNS, the latter especially in the chronic stage of MP4-induced EAE. Moreover, we observed a unique gene signature in CNS B cell aggregates compared to draining lymph nodes of MP4-immunized mice and to cerebellum as well as draining lymph nodes of mice with MOG:35–55-induced EAE. Conclusion The absence of LTi cells in the cerebellum suggests that other cells might take over the function as an initiator of lymphoid tissue formation in the CNS. Overall, the development of ectopic lymphoid organs is a complex process based on an interplay between several molecules and signals. Here, we propose some potential candidates, which might be involved in the formation of B cell aggregates in the CNS of MP4-immunized mice.
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Affiliation(s)
- Verena Schropp
- Institute of Anatomy, Chair of Anatomy and Cell Biology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Jörn Rohde
- Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany
| | - Damiano M Rovituso
- Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany
| | - Samir Jabari
- Institute of Anatomy, Chair of Anatomy and Cell Biology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Richa Bharti
- Core Unit Systems Medicine, University Hospitals of Würzburg, Würzburg, Germany
| | - Stefanie Kuerten
- Institute of Anatomy, Chair of Anatomy and Cell Biology, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany.
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Youssef RM, El-Ramly AZ, Hussien MF, Shoukry NM, Amr K. Expression of B and T lymphocyte attenuator, retinoid-related orphan receptor gamma-isoform-t and interleukin 7 in psoriasis vulgaris. Australas J Dermatol 2019; 60:e132-e137. [PMID: 30671936 DOI: 10.1111/ajd.12965] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/11/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND/OBJECTIVES Psoriasis is one of the immune-mediated inflammatory diseases where CD4+ T lymphocytes, mainly Th1 cells, and B lymphocytes contribute in their pathogenesis through a pro-inflammatory effect, production of antibodies, activation of T cells and cytokine synthesis. B and T lymphocyte attenuator (BTLA) is a co-inhibitory molecule expressed on T and B lymphocytes as well as other immune cells, and it is necessary to inhibit homoeostatic expansion and activation of lymph node and skin-resident γδ T cells. BTLA expression is regulated by RORγt and IL-7. The study aimed at adding more insight on the role played by co-inhibitory molecule BTLA in psoriasis vulgaris and its inter-relation with RORγt and IL-7 to establish a basis for novel treatment strategies. METHODS This case-control study included 25 patients and 25 controls examined for gene expression of BTLA, RORγt and IL-7. RESULTS B and T lymphocyte attenuator was significantly lower in psoriasis patients, whereas both RORγt and IL-7 were higher in comparison with controls. A significant positive correlation between disease severity (PASI) and both RORγt and IL-7 as well as between RORγt and IL-7 was found. A significant negative correlation between BTLA and both RORγt and IL-7 was found. Neither the age nor the duration of disease had any correlation with BTLA, RORγt or IL-7. BTLA had no correlation with PASI. Regarding the control group, a significant negative correlation between RORγt and IL-7 was found. CONCLUSION B and T lymphocyte attenuator, RORγt and IL-7 play an important role in psoriasis.
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Affiliation(s)
| | | | | | | | - Khalda Amr
- Department of Molecular Genetics, National Research Centre, Cairo, Egypt
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13
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Abstract
Innate lymphoid cells (ILC) are a recently identified group of innate lymphocytes that are preferentially located at barrier surfaces. Barrier surfaces are in direct contact with complex microbial ecosystems, collectively referred to as the microbiota. It is now believed that the interplay of the microbiota with host components (i.e. epithelial cells and immune cells) promotes host fitness by regulating organ homeostasis, metabolism, and host defense against pathogens. In this review, we will give an overview of this multifaceted interplay between ILC and components of the microbiota.
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Affiliation(s)
- Liudmila Britanova
- Research Centre Immunotherapy and Institute of Microbiology and Hygiene, Mainz, Germany
| | - Andreas Diefenbach
- Department of Microbiology, Charité - Universitätsmedizin Berlin, and Berlin Institute of Health, Berlin, Germany
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14
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Dutton EE, Camelo A, Sleeman M, Herbst R, Carlesso G, Belz GT, Withers DR. Characterisation of innate lymphoid cell populations at different sites in mice with defective T cell immunity. Wellcome Open Res 2018. [DOI: 10.12688/wellcomeopenres.13199.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Background: Innate lymphoid cells (ILCs) have now been identified within most tissues of the body and current evidence indicates that this family of cells play a fundamental role in maintaining tissue homeostasis. However, few studies have compared the ILC populations between several tissues. Methods: We sought to generate a comprehensive characterisation of the ILC populations in different tissues of C57BL/6 WT and genetically modified mice targeting costimulatory pathways, using transcription factor expression to define specific groups. Results: Consistent with studies individually describing the ILC composition in different tissues, our analysis revealed different ILC groups dominate the ILC population in different tissues. Additionally, we observed a population of IL-7Rα+Id2+ cells lacking expression of lineage markers but also lacking expression of GATA-3, RORgt or T-bet. This population was most evident in ear skin where it outnumbered the defined ILC groups, however, further experiments demonstrated that detection of these cells was influenced by how the tissue was digested, raising concerns as to its real nature. Since both ILC2 and ILC3 express ICOS, we then investigated the requirement for ICOS:ICOSL interactions in the homeostasis of ILC populations at these sites. Surprisingly, no significant differences were detected in the number of ILC1, ILC2 or ILC3 between WT and ICOSL-/- mice in any tissue, indicating that this pathway is not required for ILC homeostasis at these sites. These data were compared with CD80-/-CD86-/- mice given evidence of CD28 expression by some ILC and ILC crosstalk with activated T cells. Notably, the absence of CD28 ligands resulted in a significant increase in ILC2 and ILC3 numbers in the intestine. Conclusions: Together, these data provide new insight into ILC composition in different tissues in both WT and genetically modified mice where key costimulatory pathways are genetically deleted, providing a useful resource for further research into ILC biology.
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15
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Colbeck EJ, Ager A, Gallimore A, Jones GW. Tertiary Lymphoid Structures in Cancer: Drivers of Antitumor Immunity, Immunosuppression, or Bystander Sentinels in Disease? Front Immunol 2017; 8:1830. [PMID: 29312327 PMCID: PMC5742143 DOI: 10.3389/fimmu.2017.01830] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/04/2017] [Indexed: 12/16/2022] Open
Abstract
Secondary lymphoid organs are integral to initiation and execution of adaptive immune responses. These organs provide a setting for interactions between antigen-specific lymphocytes and antigen-presenting cells recruited from local infected or inflamed tissues. Secondary lymphoid organs develop as a part of a genetically preprogrammed process during embryogenesis. However, organogenesis of secondary lymphoid tissues can also be recapitulated in adulthood during de novo lymphoid neogenesis of tertiary lymphoid structures (TLSs). These ectopic lymphoid-like structures form in the inflamed tissues afflicted by various pathological conditions, including cancer, autoimmunity, infection, or allograft rejection. Studies are beginning to shed light on the function of such structures in different disease settings, raising important questions regarding their contribution to progression or resolution of disease. Data show an association between the tumor-associated TLSs and a favorable prognosis in various types of human cancer, attracting the speculation that TLSs support effective local antitumor immune responses. However, definitive evidence for the role for TLSs in fostering immune responses in vivo are lacking, with current data remaining largely correlative by nature. In fact, some more recent studies have even demonstrated an immunosuppressive, tumor-promoting role for cancer-associated TLSs. In this review, we will discuss what is known about the development of cancer-associated TLSs and the current understanding of their potential role in the antitumor immune response.
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Affiliation(s)
| | - Ann Ager
- Division of Infection and Immunity, School of Medicine and Systems Immunity Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Awen Gallimore
- Division of Infection and Immunity, School of Medicine and Systems Immunity Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Gareth Wyn Jones
- Division of Infection and Immunity, School of Medicine and Systems Immunity Research Institute, Cardiff University, Cardiff, United Kingdom
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16
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Dutton EE, Camelo A, Sleeman M, Herbst R, Carlesso G, Belz GT, Withers DR. Characterisation of innate lymphoid cell populations at different sites in mice with defective T cell immunity. Wellcome Open Res 2017. [PMID: 29588921 DOI: 10.12688/wellcomeopenres.13199.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Background: Innate lymphoid cells (ILCs) have now been identified within most tissues of the body and current evidence indicates that this family of cells play a fundamental role in maintaining tissue homeostasis. However, few studies have compared the ILC populations between several tissues. Methods: We sought to generate a comprehensive characterisation of the ILC populations in different tissues of C57BL/6 WT and genetically modified mice targeting costimulatory pathways, using transcription factor expression to define specific groups. Results: Consistent with studies individually describing the ILC composition in different tissues, our analysis revealed different ILC groups dominate the ILC population in different tissues. Additionally, we observed a population of IL-7Rα +Id2 + cells lacking expression of lineage markers but also lacking expression of GATA-3, RORgt or T-bet. This population was most evident in ear skin where it outnumbered the defined ILC groups, however, further experiments demonstrated that detection of these cells was influenced by how the tissue was digested, raising concerns as to its real nature. Since both ILC2 and ILC3 express ICOS, we then investigated the requirement for ICOS:ICOSL interactions in the homeostasis of ILC populations at these sites. Surprisingly, no significant differences were detected in the number of ILC1, ILC2 or ILC3 between WT and ICOSL -/- mice in any tissue, indicating that this pathway is not required for ILC homeostasis at these sites. These data were compared with CD80 -/-CD86 -/- mice given evidence of CD28 expression by some ILC and ILC crosstalk with activated T cells. Notably, the absence of CD28 ligands resulted in a significant increase in ILC2 and ILC3 numbers in the intestine. Conclusions: Together, these data provide new insight into ILC composition in different tissues in both WT and genetically modified mice where key costimulatory pathways are genetically deleted, providing a useful resource for further research into ILC biology.
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Affiliation(s)
- Emma E Dutton
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Ana Camelo
- MedImmune, Aaron Klug building, Granta Park, Cambridge, UK
| | - Matthew Sleeman
- MedImmune, Aaron Klug building, Granta Park, Cambridge, UK.,Immunology & Inflammation Group, Regeneron, Tarrytown, NY, USA
| | - Ronald Herbst
- Department of Cancer Biology, MedImmune, Gaithersburg, MD, USA
| | | | - Gabrielle T Belz
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - David R Withers
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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17
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Dutton EE, Camelo A, Sleeman M, Herbst R, Carlesso G, Belz GT, Withers DR. Characterisation of innate lymphoid cell populations at different sites in mice with defective T cell immunity. Wellcome Open Res 2017; 2:117. [PMID: 29588921 PMCID: PMC5854988 DOI: 10.12688/wellcomeopenres.13199.3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2017] [Indexed: 01/09/2023] Open
Abstract
Background: Innate lymphoid cells (ILCs) have now been identified within most tissues of the body and current evidence indicates that this family of cells play a fundamental role in maintaining tissue homeostasis. However, few studies have compared the ILC populations between several tissues. Methods: We sought to generate a comprehensive characterisation of the ILC populations in different tissues of C57BL/6 WT and genetically modified mice targeting costimulatory pathways, using transcription factor expression to define specific groups. Results: Consistent with studies individually describing the ILC composition in different tissues, our analysis revealed different ILC groups dominate the ILC population in different tissues. Additionally, we observed a population of IL-7Rα
+Id2
+ cells lacking expression of lineage markers but also lacking expression of GATA-3, RORgt or T-bet. This population was most evident in ear skin where it outnumbered the defined ILC groups, however, further experiments demonstrated that detection of these cells was influenced by how the tissue was digested, raising concerns as to its real nature. Since both ILC2 and ILC3 express ICOS, we then investigated the requirement for ICOS:ICOSL interactions in the homeostasis of ILC populations at these sites. Surprisingly, no significant differences were detected in the number of ILC1, ILC2 or ILC3 between WT and ICOSL
-/- mice in any tissue, indicating that this pathway is not required for ILC homeostasis at these sites. These data were compared with CD80
-/-CD86
-/- mice given evidence of CD28 expression by some ILC and ILC crosstalk with activated T cells. Notably, the absence of CD28 ligands resulted in a significant increase in ILC2 and ILC3 numbers in the intestine. Conclusions: Together, these data provide new insight into ILC composition in different tissues in both WT and genetically modified mice where key costimulatory pathways are genetically deleted, providing a useful resource for further research into ILC biology.
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Affiliation(s)
- Emma E Dutton
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Ana Camelo
- MedImmune, Aaron Klug building, Granta Park, Cambridge, UK
| | - Matthew Sleeman
- MedImmune, Aaron Klug building, Granta Park, Cambridge, UK.,Immunology & Inflammation Group, Regeneron, Tarrytown, NY, USA
| | - Ronald Herbst
- Department of Cancer Biology, MedImmune, Gaithersburg, MD, USA
| | | | - Gabrielle T Belz
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - David R Withers
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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18
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Abstract
The maintenance of mammalian health requires the generation of appropriate immune responses against a broad range of environmental and microbial challenges, which are continually encountered at barrier tissue sites including the skin, lung, and gastrointestinal tract. Dysregulated barrier immune responses result in inflammation, both locally and systemically in peripheral organs. Group 3 innate lymphoid cells (ILC3) are constitutively present at barrier sites and appear to be highly specialized in their ability to sense a range of environmental and host-derived signals. Under homeostatic conditions, ILC3 respond to local cues to maintain tissue homeostasis and restrict inflammatory responses. In contrast, perturbations in the tissue microenvironment resulting from disease, infection, or tissue damage can drive dysregulated pro-inflammatory ILC3 responses and contribute to immunopathology. The tone of the ILC3 response is dictated by a balance of “exogenous” signals, such as dietary metabolites and commensal microbes, and “endogenous” host-derived signals from stromal cells, immune cells, and the nervous system. ILC3 must therefore have the capacity to simultaneously integrate a wide array of complex and dynamic inputs in order to regulate barrier function and tissue health. In this review, we discuss the concept of ILC3 as a “communications hub” in the intestinal tract and associated lymphoid tissues and address the variety of signals, derived from multiple biological systems, which are interpreted by ILC3 to modulate the release of downstream effector molecules and regulate cell–cell crosstalk. Successful integration of environmental cues by ILC3 and downstream propagation to the broader immune system is required to maintain a tolerogenic and anti-inflammatory tone and reinforce barrier function, whereas dysregulation of ILC3 responses can contribute to the onset or progression of clinically relevant chronic inflammatory diseases.
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Affiliation(s)
- David R Withers
- College of Medical and Dental Sciences, Institute of Immunology and Immunotherapy (III), University of Birmingham, Birmingham, United Kingdom
| | - Matthew R Hepworth
- Manchester Collaborative Centre for Inflammation Research (MCCIR), Division of Infection, Immunity and Respiratory Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
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19
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Gao J, Zhao L, Liu L, Yang Y, Guo B, Zhu B. Disrupted fibroblastic reticular cells and interleukin-7 expression in tumor draining lymph nodes. Oncol Lett 2017; 14:2954-2960. [PMID: 28928833 PMCID: PMC5588138 DOI: 10.3892/ol.2017.6537] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 04/28/2017] [Indexed: 11/06/2022] Open
Abstract
The immune system of patients with cancer is usually in an inhibitory state. Lymph node (LN) draining of pathological sites provides a suitable microenvironment where adaptive immune responses mainly occur. However, the microenvironment in the tumor draining lymph nodes (TDLNs) of patients with cancer appears to be in favor of tolerance. The effects of tumor cells on TDLNs have not been elaborated clearly. The present results have indicated that tumor cells may directly affect TDLNs by decreasing the fibroblastic reticular cell population that led to less interleukin-7 secretion. As a result, the number of T cells in TDLNs declined with reduced survival signals. A decreased number of T cells in TDLNs means weakened ability of immune surveillance. Clinically, these results were also confirmed in LN biopsies from patients with colon cancer at different clinical stages. Results of the present study showed that tumor cells may directly inhibit the immunological function of TDLNs.
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Affiliation(s)
- Jianbao Gao
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Lintao Zhao
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China.,Department of Oncology, The People's Liberation Army No. 324 Hospital, Chongqing 404000, P.R. China
| | - Lina Liu
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Yang Yang
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Bo Guo
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China.,Department of Pathogenic Biology, Third Military Medical University, Chongqing 400038, P.R. China
| | - Bo Zhu
- Department of Oncology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
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20
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Abstract
Tertiary lymphoid organs are found at sites of chronic inflammation in autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. These organized accumulations of T and B cells resemble secondary lymphoid organs and generate autoreactive effector cells. However, whether they contribute to disease pathogenesis or have protective functions is unclear. Here, we discuss how tertiary lymphoid organs can generate potentially pathogenic cells but may also limit the extent of the response and damage in autoimmune disease.
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Affiliation(s)
- William D. Shipman
- Autoimmunity and Inflammation Program, Hospital for Special Surgery, New York, NY, USA
- Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA
- Weill Cornell/Rockefeller/Sloan-Kettering Tri-Institutional MD-PhD Program, New York, NY, USA
| | - Dragos C. Dasoveanu
- Autoimmunity and Inflammation Program, Hospital for Special Surgery, New York, NY, USA
- Physiology, Biophysics, and Systems Biology Program, Weill Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Theresa T. Lu
- Autoimmunity and Inflammation Program, Hospital for Special Surgery, New York, NY, USA
- Weill Cornell/Rockefeller/Sloan-Kettering Tri-Institutional MD-PhD Program, New York, NY, USA
- Pediatric Rheumatology, Hospital for Special Surgery, New York, NY, USA
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, NY, USA
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21
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Abstract
The family of innate lymphoid cells (ILCs) has attracted attention in recent years as its members are important regulators of immunity, while they can also cause pathology. In both mouse and man, ILCs were initially discovered in developing lymph nodes as lymphoid tissue inducer (LTi) cells. These cells form the prototypic members of the ILC family and play a central role in the formation of secondary lymphoid organs (SLOs). In the absence of LTi cells, lymph nodes (LN) and Peyer's Patches (PP) fail to form in mice, although the splenic white pulp can develop normally. Besides LTi cells, the ILC family encompasses helper-like ILCs with functional distinctions as seen by T-helper cells, as well as cytotoxic natural killer (NK) cells. ILCs are still present in adult SLOs where they have been shown to play a role in lymphoid tissue regeneration. Furthermore, ILCs were implicated to interact with adaptive lymphocytes and influence the adaptive immune response. Here, we review the recent literature on the role of ILCs in secondary lymphoid tissue from the formation of SLOs to mature SLOs in adults, during homeostasis and pathology.
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Affiliation(s)
- Yotam E Bar-Ephraïm
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Reina E Mebius
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
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22
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Bar-Ephraim YE, Konijn T, Gönültas M, Mebius RE, Reijmers RM. A Reproducible Method for Isolation and In Vitro Culture of Functional Human Lymphoid Stromal Cells from Tonsils. PLoS One 2016; 11:e0167555. [PMID: 27907202 DOI: 10.1371/journal.pone.0167555] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 11/16/2016] [Indexed: 12/11/2022] Open
Abstract
The stromal compartment of secondary lymphoid organs is classicaly known for providing a mechanical scaffold for the complex interactions between hematopoietic cells during immune activation as well as for providing a niche which is favorable for survival of lymphocytes. In recent years, it became increasingly clear that these cells also play an active role during such a response. Currently, knowledge of the interactions between human lymphoid stroma and hematopoietic cells is still lacking and most insight is based on murine systems. Although methods to isolate stromal cells from tonsils have been reported, data on stability in culture, characterization, and functional properties are lacking. Here, we describe a reproducible and easy method for isolation and in vitro culture of functional human lymphoid stromal cells from palatine tonsils. The cells isolated express markers and characteristics of T cell zone fibroblastic reticular cells (FRCs) and react to inflammatory stimuli by upregulating inflammatory cytokines and chemokines as well as adhesion molecules, as previously described for mouse lymphoid stroma. Also, cultured tonsil stromal cells support survival of human innate lymphoid cells, showing that these stromal cells can function as bone fide FRCs, providing a favorable microenvironment for hematopoietic cells.
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23
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Jing F, Choi EY. Potential of Cells and Cytokines/Chemokines to Regulate Tertiary Lymphoid Structures in Human Diseases. Immune Netw 2016; 16:271-280. [PMID: 27799872 PMCID: PMC5086451 DOI: 10.4110/in.2016.16.5.271] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/22/2016] [Accepted: 08/27/2016] [Indexed: 02/06/2023] Open
Abstract
Tertiary lymphoid structures (TLS) are ectopic lymphoid tissues involved in chronic inflammation, autoimmune diseases, transplant rejection and cancer. They exhibit almost all the characteristics of secondary lymphoid organs (SLO), which are associated with adaptive immune responses; as such, they contain organized B-cell follicles with germinal centers, distinct areas containing T cells and dendritic cells, high endothelial venules, and lymphatics. In this review, we briefly describe the formation of SLO, and describe the cellular subsets and molecular cues involved in the formation and maintenance of TLS. Finally, we discuss the associations of TLS with human diseases, especially autoimmune diseases, and the potential for therapeutic targeting.
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Affiliation(s)
- Feifeng Jing
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Eun Young Choi
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
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24
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Jones GW, Hill DG, Jones SA. Understanding Immune Cells in Tertiary Lymphoid Organ Development: It Is All Starting to Come Together. Front Immunol 2016; 7:401. [PMID: 27752256 PMCID: PMC5046062 DOI: 10.3389/fimmu.2016.00401] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 09/21/2016] [Indexed: 01/28/2023] Open
Abstract
Tertiary lymphoid organs (TLOs) are frequently observed in tissues affected by non-resolving inflammation as a result of infection, autoimmunity, cancer, and allograft rejection. These highly ordered structures resemble the cellular composition of lymphoid follicles typically associated with the spleen and lymph node compartments. Although TLOs within tissues show varying degrees of organization, they frequently display evidence of segregated T and B cell zones, follicular dendritic cell networks, a supporting stromal reticulum, and high endothelial venules. In this respect, they mimic the activities of germinal centers and contribute to the local control of adaptive immune responses. Studies in various disease settings have described how these structures contribute to either beneficial or deleterious outcomes. While the development and architectural organization of TLOs within inflamed tissues requires homeostatic chemokines, lymphoid and inflammatory cytokines, and adhesion molecules, our understanding of the cells responsible for triggering these events is still evolving. Over the past 10–15 years, novel immune cell subsets have been discovered that have more recently been implicated in the control of TLO development and function. In this review, we will discuss the contribution of these cell types and consider the potential to develop new therapeutic strategies that target TLOs.
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Affiliation(s)
- Gareth W Jones
- Division of Infection and Immunity, Systems Immunity URI, The School of Medicine, Cardiff University , Cardiff , UK
| | - David G Hill
- Division of Infection and Immunity, Systems Immunity URI, The School of Medicine, Cardiff University , Cardiff , UK
| | - Simon A Jones
- Division of Infection and Immunity, Systems Immunity URI, The School of Medicine, Cardiff University , Cardiff , UK
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25
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Abstract
Innate lymphoid cells (ILC) have only recently been recognized as a separate entity of the lymphoid lineage. Their subpopulations share common characteristics in terms of early development and major transcriptional circuitry with their related cousins of the T cell world. It is currently hypothesized that ILCs constitute an evolutionary older version of the lymphoid immune system. They are found at all primary entry points for pathogens such as mucosal surfaces of the lung and gastrointestinal system, the skin and the liver, which is the central contact point for pathogens that breach the intestinal barrier and enter the circulation. There, ILC contribute to the first line defense as well as to organ homeostasis. However, ILC are not only involved in classical defense tasks, but also contribute to the organogenesis of lymphoid organs as well as tissue remodeling and even stem cell regeneration. ILC may, therefore, implement different functions according to their emergence in ontogeny, their development and their final tissue location. We will review here their early development from precursors of the fetal liver and the adult bone marrow as well as their late plasticity in adaptation to their environment.
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Affiliation(s)
- Konrad Gronke
- Research Centre Immunology, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany; Institute of Medical Microbiology and Hygiene, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany; Max-Planck-Institute of Immunobiology and Epigenetics, Stübeweg 51, D79108 Freiburg, Germany
| | - Michael Kofoed-Nielsen
- Research Centre Immunology, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany; Institute of Medical Microbiology and Hygiene, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany; Max-Planck-Institute of Immunobiology and Epigenetics, Stübeweg 51, D79108 Freiburg, Germany
| | - Andreas Diefenbach
- Research Centre Immunology, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany; Institute of Medical Microbiology and Hygiene, University Medical Centre of the Johannes Gutenberg University Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany.
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26
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Baerenwaldt A, von Burg N, Kreuzaler M, Sitte S, Horvath E, Peter A, Voehringer D, Rolink AG, Finke D. Flt3 Ligand Regulates the Development of Innate Lymphoid Cells in Fetal and Adult Mice. J Immunol 2016; 196:2561-71. [PMID: 26851220 DOI: 10.4049/jimmunol.1501380] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 01/03/2016] [Indexed: 11/19/2022]
Abstract
Flt3 ligand (Flt3L) promotes survival of lymphoid progenitors in the bone marrow and differentiation of dendritic cells (DCs), but its role in regulating innate lymphoid cells (ILCs) during fetal and adult life is not understood. By using Flt3L knockout and transgenic mice, we demonstrate that Flt3L controls ILC numbers by regulating the pool of α4β7(-) and α4β7(+) lymphoid tissue inducer cell progenitors in the fetal liver and common lymphoid progenitors in the bone marrow. Deletion of flt3l severely reduced the number of fetal liver progenitors and lymphoid tissue inducer cells in the neonatal intestine, resulting in impaired development of Peyer's patches. In the adult intestine, NK cells and group 2 and 3 ILCs were severely reduced. This effect occurred independently of DCs as ILC numbers were normal in mice in which DCs were constitutively deleted. Finally, we could show that administration of Flt3L increased the number of NKp46(-) group 3 ILCs in wild-type and even in Il7(-/-) mice, which generally have reduced numbers of ILCs. Taken together, Flt3L significantly contributes to ILC and Peyer's patches development by targeting lymphoid progenitor cells during fetal and adult life.
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Affiliation(s)
- Anne Baerenwaldt
- University of Basel Children's Hospital, 4056 Basel, Switzerland; Developmental Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Nicole von Burg
- University of Basel Children's Hospital, 4056 Basel, Switzerland; Developmental Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Matthias Kreuzaler
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland; and
| | - Selina Sitte
- Department of Infection Biology, University Clinic of Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Edit Horvath
- University of Basel Children's Hospital, 4056 Basel, Switzerland; Developmental Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Annick Peter
- University of Basel Children's Hospital, 4056 Basel, Switzerland; Developmental Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - David Voehringer
- Department of Infection Biology, University Clinic of Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Antonius G Rolink
- Developmental and Molecular Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland; and
| | - Daniela Finke
- University of Basel Children's Hospital, 4056 Basel, Switzerland; Developmental Immunology, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland;
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Chea S, Schmutz S, Berthault C, Perchet T, Petit M, Burlen-Defranoux O, Goldrath A, Rodewald HR, Cumano A, Golub R. Single-Cell Gene Expression Analyses Reveal Heterogeneous Responsiveness of Fetal Innate Lymphoid Progenitors to Notch Signaling. Cell Rep 2016; 14:1500-1516. [PMID: 26832410 DOI: 10.1016/j.celrep.2016.01.015] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 12/01/2015] [Accepted: 01/02/2016] [Indexed: 11/27/2022] Open
Abstract
T and innate lymphoid cells (ILCs) share some aspects of their developmental programs. However, although Notch signaling is strictly required for T cell development, it is dispensable for fetal ILC development. Constitutive activation of Notch signaling, at the common lymphoid progenitor stage, drives T cell development and abrogates ILC development by preventing Id2 expression. By combining single-cell transcriptomics and clonal culture strategies, we characterize two heterogeneous α4β7-expressing lymphoid progenitor compartments. αLP1 (Flt3(+)) still retains T cell potential and comprises the global ILC progenitor, while αLP2 (Flt3(-)) consists of ILC precursors that are primed toward the different ILC lineages. Only a subset of αLP2 precursors is sensitive to Notch signaling required for their proliferation. Our study identifies, in a refined manner, the diversity of transitional stages of ILC development, their transcriptional signatures, and their differential dependence on Notch signaling.
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28
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Chypre M, Seaman J, Cordeiro OG, Willen L, Knoop KA, Buchanan A, Sainson RCA, Williams IR, Yagita H, Schneider P, Mueller CG. Characterization and application of two RANK-specific antibodies with different biological activities. Immunol Lett 2016; 171:5-14. [PMID: 26773232 DOI: 10.1016/j.imlet.2016.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/21/2015] [Accepted: 01/04/2016] [Indexed: 12/13/2022]
Abstract
Antibodies play an important role in therapy and investigative biomedical research. The TNF-family member Receptor Activator of NF-κB (RANK) is known for its role in bone homeostasis and is increasingly recognized as a central player in immune regulation and epithelial cell activation. However, the study of RANK biology has been hampered by missing or insufficient characterization of high affinity tools that recognize RANK. Here, we present a careful description and comparison of two antibodies, RANK-02 obtained by phage display (Newa, 2014 [1]) and R12-31 generated by immunization (Kamijo, 2006 [2]). We found that both antibodies recognized mouse RANK with high affinity, while RANK-02 and R12-31 recognized human RANK with high and lower affinities, respectively. Using a cell apoptosis assay based on stimulation of a RANK:Fas fusion protein, and a cellular NF-κB signaling assay, we showed that R12-31 was agonist for both species. R12-31 interfered little or not at all with the binding of RANKL to RANK, in contrast to RANK-02 that efficiently prevented this interaction. Depending on the assay and species, RANK-02 was either a weak agonist or a partial antagonist of RANK. Both antibodies recognized human Langerhans cells, previously shown to express RANK, while dermal dendritic cells were poorly labeled. In vivo R12-31 agonist activity was demonstrated by its ability to induce the formation of intestinal villous microfold cells in mice. This characterization of two monoclonal antibodies should now allow better evaluation of their application as therapeutic reagents and investigative tools.
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Affiliation(s)
- Mélanie Chypre
- CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry, University of Strasbourg, Strasbourg 67000, France; Prestwick Chemical, Blvd Gonthier d'Andernach, Parc d'innovation, 67400 Illkirch, France
| | | | - Olga G Cordeiro
- CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry, University of Strasbourg, Strasbourg 67000, France
| | - Laure Willen
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Kathryn A Knoop
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | | | - Ifor R Williams
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Hideo Yagita
- Department of Immunology, Juntendo University School of Medicine, Tokyo 113-8421, Japan
| | - Pascal Schneider
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Christopher G Mueller
- CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry, University of Strasbourg, Strasbourg 67000, France.
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29
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Goc J, Hepworth MR, Sonnenberg GF. Group 3 innate lymphoid cells: regulating host-commensal bacteria interactions in inflammation and cancer. Int Immunol 2016; 28:43-52. [PMID: 26451009 PMCID: PMC5891988 DOI: 10.1093/intimm/dxv056] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 07/22/2015] [Accepted: 09/28/2015] [Indexed: 12/15/2022] Open
Abstract
A delicate balance exists between the mammalian immune system and normally beneficial commensal bacteria that colonize the gastrointestinal tract, which is necessary to maintain tissue homeostasis. Dysregulation of these interactions between the host and commensal bacteria is causally associated with chronic inflammation and the development of cancer. In contrast, recent reports have highlighted that commensal bacteria also play an essential role in promoting anti-tumor immune responses in several contexts, highlighting a paradox whereby interactions between the host and commensal bacteria can influence both pro- and anti-tumor immunity. Given the critical roles for group 3 innate lymphoid cells (ILC3s) in regulating inflammation, tissue repair and host-microbe interactions in the intestine, here we discuss new evidence that ILC3s may profoundly influence the development, progression and control of tumors. In this review, we provide an overview of recent advances in understanding the impact of commensal bacteria on tumorigenesis, discuss recent findings identifying ILC3s as critical regulators of host-microbe interactions and highlight the emerging role of this immune cell population in cancer and their potential implication as a therapeutic target.
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Affiliation(s)
- Jeremy Goc
- Joan and Sanford I. Weill Department of Medicine, Division of Gastroenterology and Hepatology, Department of Microbiology and Immunology and The Jill Robert's Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medical College, Cornell University, 413 East 69th Street, Belfer Research Building 512, Box 190, New York, NY 10021, USA
| | - Matthew R Hepworth
- Joan and Sanford I. Weill Department of Medicine, Division of Gastroenterology and Hepatology, Department of Microbiology and Immunology and The Jill Robert's Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medical College, Cornell University, 413 East 69th Street, Belfer Research Building 512, Box 190, New York, NY 10021, USA
| | - Gregory F Sonnenberg
- Joan and Sanford I. Weill Department of Medicine, Division of Gastroenterology and Hepatology, Department of Microbiology and Immunology and The Jill Robert's Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medical College, Cornell University, 413 East 69th Street, Belfer Research Building 512, Box 190, New York, NY 10021, USA
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30
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Jones GW, Jones SA. Ectopic lymphoid follicles: inducible centres for generating antigen-specific immune responses within tissues. Immunology 2015; 147:141-51. [PMID: 26551738 PMCID: PMC4717241 DOI: 10.1111/imm.12554] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 10/28/2015] [Accepted: 11/01/2015] [Indexed: 02/06/2023] Open
Abstract
Lymphoid neogenesis is traditionally viewed as a pre‐programmed process that promotes the formation of lymphoid organs during development. Here, the spatial organization of T and B cells in lymph nodes and spleen into discrete structures regulates antigen‐specific responses and adaptive immunity following immune challenge. However, lymphoid neogenesis is also triggered by chronic or persistent inflammation. Here, ectopic (or tertiary) lymphoid organs frequently develop in inflamed tissues as a response to infection, auto‐immunity, transplantation, cancer or environmental irritants. Although these structures affect local immune responses, the contribution of these lymphoid aggregates to the underlining pathology are highly context dependent and can elicit either protective or deleterious outcomes. Here we review the cellular and molecular mechanisms responsible for ectopic lymphoid neogenesis and consider the relevance of these structures in human disease.
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Affiliation(s)
- Gareth W Jones
- Division of Infection and Immunity, The School of Medicine, Cardiff University, Cardiff, UK
| | - Simon A Jones
- Division of Infection and Immunity, The School of Medicine, Cardiff University, Cardiff, UK
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31
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van de Pavert SA, Vivier E. Differentiation and function of group 3 innate lymphoid cells, from embryo to adult. Int Immunol 2015; 28:35-42. [PMID: 26374472 DOI: 10.1093/intimm/dxv052] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/07/2015] [Indexed: 12/14/2022] Open
Abstract
Group 3 innate lymphoid cells (ILC3) represent a heterogeneous population of cells that share the nuclear hormone receptor RORγt (retinoic acid receptor-related orphan receptor γt) as a master regulator for differentiation and function. ILC3 can be divided into two major subsets based on the cell surface expression of the natural cytotoxicity receptor (NCR), NKp46. A subset of NCR(-) ILC3 includes the previously known lymphoid-tissue inducer cells that are essential for the embryonic formation of peripheral lymph nodes and Peyer's patches. After birth, the NCR(-) and NCR(+) ILC3 contribute to the maintenance of health but also to inflammation in mucosal tissues. This review will describe the differentiation pathways of ILC3, their involvement in the development of the adaptive immune system and their role in the establishment and maintenance of gut immunity.
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Affiliation(s)
- Serge A van de Pavert
- Centre d'Immunologie de Marseille-Luminy, Université d'Aix-Marseille UM2, Inserm U1104, CNRS UMR7280, 13288 Marseille, France
| | - Eric Vivier
- Centre d'Immunologie de Marseille-Luminy, Université d'Aix-Marseille UM2, Inserm U1104, CNRS UMR7280, 13288 Marseille, France Immunologie, Hôpital de la Conception, Assistance Publique - Hôpitaux de Marseille, 13385 Marseille, France
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32
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von Burg N, Turchinovich G, Finke D. Maintenance of Immune Homeostasis through ILC/T Cell Interactions. Front Immunol 2015; 6:416. [PMID: 26322047 PMCID: PMC4534831 DOI: 10.3389/fimmu.2015.00416] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 07/29/2015] [Indexed: 12/19/2022] Open
Abstract
Innate lymphoid cells (ILCs) have emerged as a new family of immune cells with crucial functions in innate and adaptive immunity. ILC subsets mirror the cytokine and transcriptional profile of CD4+ T helper (TH) cell subsets. Hence, group 1 (ILC1), group 2 (ILC2), and group 3 (ILC3) ILCs can be distinguished by the production of TH1, TH2, and TH17-type cytokines, respectively. Cytokine release by ILCs not only shapes early innate immunity but can also orchestrate TH immune responses to microbial or allergen exposure. Recent studies have identified an unexpected effector function of ILCs as antigen presenting cells. Both ILC2s and ILC3s are able to process and present foreign antigens (Ags) via major histocompatibility complex class II, and to induce cognate CD4+ T cell responses. In addition, Ag-stimulated T cells promote ILC activation and effector functions indicating a reciprocal interaction between the adaptive and innate immune system. A fundamental puzzle in ILC function is how ILC/T cell interactions promote host protection and prevent autoimmune diseases. Furthermore, the way in which microenvironmental and inflammatory signals determine the outcome of ILC/T cell immune responses in various tissues is not yet understood. This review focuses on recent advances in understanding the mechanisms that coordinate the collaboration between ILCs and T cells under homeostatic and inflammatory conditions. We also discuss the potential roles of T cells and other immune cells to regulate ILC functions and to maintain homeostasis in mucosal tissues.
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Affiliation(s)
- Nicole von Burg
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
| | - Gleb Turchinovich
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
| | - Daniela Finke
- Department of Biomedicine, University of Basel , Basel , Switzerland ; University of Basel Children's Hospital , Basel , Switzerland
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33
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Abstract
Innate lymphoid cells (ILCs) are a recently described family of lymphoid effector cells that have important roles in immune defence, inflammation and tissue remodelling. It has been proposed that ILCs represent 'innate' homologues of differentiated effector T cells, and they have been categorized into three groups — namely, ILC1s, ILC2s and ILC3s — on the basis of their expression of cytokines and transcription factors that are typically associated with T helper 1 (T(H)1)-, T(H)2- and T(H)17-type immune responses, respectively. Indeed, remarkable similarity is seen between the specific transcription factors required for the development and diversification of different ILC groups and those that drive effector T cell differentiation. The recent identification of dedicated ILC precursors has provided a view of the mechanisms that control this first essential stage of ILC development. Here, we discuss the transcriptional mechanisms that regulate ILC development and diversification into distinct effector subsets with key roles in immunity and tissue homeostasis. We further caution against the current distinction between 'helper' versus 'killer' subsets in the evolving area of ILC nomenclature.
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34
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Guo X, Liang Y, Zhang Y, Lasorella A, Kee BL, Fu YX. Innate Lymphoid Cells Control Early Colonization Resistance against Intestinal Pathogens through ID2-Dependent Regulation of the Microbiota. Immunity 2015; 42:731-43. [PMID: 25902484 PMCID: PMC4725053 DOI: 10.1016/j.immuni.2015.03.012] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [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: 07/22/2014] [Revised: 12/21/2014] [Accepted: 02/25/2015] [Indexed: 12/12/2022]
Abstract
Microbiota-mediated effects on the host immune response facilitate colonization resistance against pathogens. However, it is unclear whether and how the host immune response can regulate the microbiota to mediate colonization resistance. ID2, an essential transcriptional regulator for the development of innate lymphoid cell (ILC) progenitors, remains highly expressed in differentiated ILCs with unknown function. Using conditionally deficient mice in which ID2 is deleted from differentiated ILC3s, we observed that these mutant mice exhibited greatly impaired gut colonization resistance against Citrobacter rodentium. Utilizing gnotobiotic hosts, we showed that the ID2-dependent early colonization resistance was mediated by interleukin-22 (IL-22) regulation of the microbiota. In addition to regulating development, ID2 maintained homeostasis of ILC3s and controlled IL-22 production through an aryl hydrocarbon receptor (AhR) and IL-23 receptor pathway. Thus, ILC3s can mediate immune surveillance, which constantly maintains a proper microbiota, to facilitate early colonization resistance through an ID2-dependent regulation of IL-22.
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Affiliation(s)
- Xiaohuan Guo
- Department of Pathology and Committee on Immunology, The University of Chicago, Chicago, IL 60637, USA; Tsinghua University School of Medicine, Beijing 100084, China.
| | - Yong Liang
- Department of Pathology and Committee on Immunology, The University of Chicago, Chicago, IL 60637, USA; Institute of Biophysics and The University of Chicago joint Group for Immunotherapy, Key Laboratory for Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China
| | - Yuan Zhang
- Department of Pathology and Committee on Immunology, The University of Chicago, Chicago, IL 60637, USA
| | - Anna Lasorella
- Institute for Cancer Genetics, Departments of Neurology and Pathology, Columbia University Medical Center, New York, NY 10032, USA
| | - Barbara L Kee
- Department of Pathology and Committee on Immunology, The University of Chicago, Chicago, IL 60637, USA
| | - Yang-Xin Fu
- Department of Pathology and Committee on Immunology, The University of Chicago, Chicago, IL 60637, USA; Institute of Biophysics and The University of Chicago joint Group for Immunotherapy, Key Laboratory for Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China.
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35
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Lim AWY, McKenzie ANJ. Deciphering the transcriptional switches of innate lymphoid cell programming: the right factors at the right time. Genes Immun 2015; 16:177-86. [PMID: 25611557 PMCID: PMC4409422 DOI: 10.1038/gene.2014.83] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 12/17/2022]
Abstract
Innate lymphoid cells (ILCs) are increasingly recognised as an innate immune counterpart of adaptive TH cells. In addition to their similar effector cytokine production, there is a strong parallel between the transcription factors that control the differentiation of TH1, TH2 and TH17 cells and ILC Groups 1, 2 and 3, respectively. Here, we review the transcriptional circuit that specifies the development of a common ILC progenitor and its subsequent programming into distinct ILC groups. Notch, GATA-3, Nfil3 and Id2 are identified as early factors that suppress B and T cell potentials and are turned on in favour of ILC commitment. Natural killer cells, which are the cytotoxic ILCs, develop along a pathway distinct from the rest of the helper-like ILCs that are derived from a common progenitor to all helper-like innate lymphoid cells (CHILPs). PLZF− CHILPs give rise to lymphoid tissue inducer cells while PLZF+ CHILPs have multi-lineage potential and could give rise to ILCs 1, 2 and 3. Such lineage specificity is dictated by the controlled expression of T-bet, RORα, RORγt and AHR. In addition to the type of transcription factors, the developmental stages at which these factors are expressed are crucial in specifying the fate of the ILCs.
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Affiliation(s)
- A W Y Lim
- Division of Protein and Nucleic Acid Chemistry, MRC Laboratory of Molecular Biology, Cambridge, UK
| | - A N J McKenzie
- Division of Protein and Nucleic Acid Chemistry, MRC Laboratory of Molecular Biology, Cambridge, UK
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36
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Flach M, Diefenbach A. Development of Gut-Associated Lymphoid Tissues. Mucosal Immunology. Elsevier; 2015. pp. 31-42. [DOI: 10.1016/b978-0-12-415847-4.00003-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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37
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Li H, Richert-Spuhler LE, Evans TI, Gillis J, Connole M, Estes JD, Keele BF, Klatt NR, Reeves RK. Hypercytotoxicity and rapid loss of NKp44+ innate lymphoid cells during acute SIV infection. PLoS Pathog 2014; 10:e1004551. [PMID: 25503264 PMCID: PMC4263758 DOI: 10.1371/journal.ppat.1004551] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [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: 05/16/2014] [Accepted: 11/03/2014] [Indexed: 12/29/2022] Open
Abstract
HIV/SIV infections break down the integrity of the gastrointestinal mucosa and lead to chronic immune activation and associated disease progression. Innate lymphoid cells (ILCs), distinguishable by high expression of NKp44 and RORγt, play key roles in mucosal defense and homeostasis, but are depleted from gastrointestinal (GI) tract large bowel during chronic SIV infection. However, less is known about the kinetics of ILC loss, or if it occurs systemically. In acute SIV infection, we found a massive, up to 8-fold, loss of NKp44+ILCs in all mucosae as early as day 6 post-infection, which was sustained through chronic disease. Interestingly, no loss of ILCs was observed in mucosa-draining lymph nodes. In contrast, classical NK cells were not depleted either from gut or draining lymph nodes. Both ILCs and NK cells exhibited significantly increased levels of apoptosis as measured by increased Annexin-V expression, but while classical NK cells also showed increased proliferation, ILCs did not. Interestingly, ILCs, which are normally noncytolytic, dramatically upregulated cytotoxic functions in acute and chronic infection and acquired a polyfunctional phenotype secreting IFN-γ, MIP1-β, and TNF-α, but decreased production of the prototypical cytokine, IL-17. Classical NK cells had less dramatic functional change, but upregulated perforin expression and increased cytotoxic potential. Finally, we show that numerical and functional loss of ILCs was due to increased apoptosis and ROR γt suppression induced by inflammatory cytokines in the gut milieu. Herein we demonstrate the first evidence for acute, systemic, and permanent loss of mucosal ILCs during SIV infection associated with reduction of IL-17. The massive reduction of ILCs involves apoptosis without compensatory de novo development/proliferation, but the full mechanism of depletion and the impact of functional change so early in infection remain unclear. HIV-1 has long been shown to deplete CD4+ T cells and disrupt barrier integrity in the gastrointestinal tract, but effects on other subpopulations of lymphocytes are less well described. A recently identified subpopulation of mucosa-restricted cells, termed innate lymphoid cells (ILCs) is thought to play critical roles in maintaining homeostasis in the gastrointestinal tract and mucosal pathogen defense. Although previous work from our laboratory and others have shown SIV infection of rhesus macaques can deplete ILCs in some parts of the gastrointestinal tract, systemic as well as kinetic effects were unclear. In this report we show that ILCs, but not classical NK cells are systemically depleted during infection and also acquire cytotoxic capabilities. Furthermore, our data is the first to indicate that this important subset of innate cells is depleted acutely, permanently, and systemically during SIV infection of rhesus macaques as a model for HIV-1 infection. Given the important role of ILCs in maintaining gut homeostasis these findings could have significant implications for the understanding and treatment of HIV-induced disease.
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Affiliation(s)
- Haiying Li
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Laura E. Richert-Spuhler
- Department of Pharmaceutics, Washington National Primate Research Center, University of Washington, Seattle, Washington, United States of America
| | - Tristan I. Evans
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough Campus, Southborough, Massachusetts, United States of America
| | - Jacqueline Gillis
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough Campus, Southborough, Massachusetts, United States of America
| | - Michelle Connole
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough Campus, Southborough, Massachusetts, United States of America
| | - Jacob D. Estes
- AIDS and Cancer Virus Program, Leidos Biomedical Research, Inc., Frederick National Laboratory, Frederick, Maryland, United States of America
| | - Brandon F. Keele
- AIDS and Cancer Virus Program, Leidos Biomedical Research, Inc., Frederick National Laboratory, Frederick, Maryland, United States of America
| | - Nichole R. Klatt
- Department of Pharmaceutics, Washington National Primate Research Center, University of Washington, Seattle, Washington, United States of America
| | - R. Keith Reeves
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough Campus, Southborough, Massachusetts, United States of America
- * E-mail:
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38
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Abstract
Innate lymphocytes have recently received a lot of attention. However, there are different ideas about the definition of what is “innate” in lymphocytes. Lymphocytes without V(D)J-rearranged antigen receptors are now termed innate lymphoid cells (ILCs) and include cells formerly known as natural killer (NK) cells. Also, lymphocytes that are innate should be able to recognize microbial or stress-induced patterns and react rapidly without prior sensitization, as opposed to adaptive immune responses. Formally, genuine innate lymphocytes would be present before or at birth. Here, we review the ontogeny of human and mouse innate T lymphocyte populations. We focus on γδ T cells, which are prototype lymphocytes that often use their V(D)J rearrangement machinery to generate genetically encoded predetermined recombinations of antigen receptors. We make parallels between the development of γδ T cells with that of innate αβ T cells [invariant (i)NKT and mucosa-associated invariant T cells] and compare this with the ontogeny of innate B cells and ILCs (including NK cells). We conclude that some subsets are more innate than others, i.e., innate lymphocytes that are made primarily early in utero during gestation while others are made after birth. In practice, a ranking of innateness by ontogeny has implications for the reconstitution of innate lymphocyte subsets after hematopoietic stem cell transplantation.
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Affiliation(s)
- David Vermijlen
- Faculty of Pharmacy, Université Libre de Bruxelles (ULB) , Bruxelles , Belgium
| | - Immo Prinz
- Institute of Immunology, Hannover Medical School , Hannover , Germany
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39
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Korn LL, Thomas HL, Hubbeling HG, Spencer SP, Sinha R, Simkins HMA, Salzman NH, Bushman FD, Laufer TM. Conventional CD4+ T cells regulate IL-22-producing intestinal innate lymphoid cells. Mucosal Immunol 2014; 7:1045-57. [PMID: 24448096 PMCID: PMC4107180 DOI: 10.1038/mi.2013.121] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [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: 05/20/2013] [Accepted: 12/04/2013] [Indexed: 02/04/2023]
Abstract
The innate and adaptive immune systems in the intestine cooperate to maintain the integrity of the intestinal barrier and to regulate the composition of the resident microbiota. However, little is known about the crosstalk between the innate and adaptive immune systems that contribute to this homeostasis. We find that CD4+ T cells regulate the number and function of barrier-protective innate lymphoid cells (ILCs), as well as production of antimicrobial peptides (AMPs), Reg3γ and Reg3β. RAG1-/- mice lacking T and B cells had elevated ILC numbers, interleukin-22 (IL-22) production, and AMP expression, which were corrected by replacement of CD4+ T cells. Major histocompatibility class II-/- (MHCII-/-) mice lacking CD4+ T cells also had increased ILCs, IL-22, and AMPs, suggesting that negative regulation by CD4+ T cells occurs at steady state. We utilized transfers and genetically modified mice to show that reduction of IL-22 is mediated by conventional CD4+ T cells and is T-cell receptor dependent. The IL-22-AMP axis responds to commensal bacteria; however, neither the bacterial repertoire nor the gross localization of commensal bacteria differed between MHCII+/- and MHCII-/- littermates. These data define a novel ability of CD4+ T cells to regulate intestinal IL-22-producing ILCs and AMPs.
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Affiliation(s)
- Lisa L. Korn
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Hannah L. Thomas
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Harper G. Hubbeling
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
- Philadelphia Veterans Affairs Medical Center, Philadelphia, PA 19104
| | - Sean P. Spencer
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Rohini Sinha
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Helen M. A. Simkins
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Nita H. Salzman
- Department of Pediatrics, The Medical College of Wisconsin, Milwaukee, WI 53226
| | - Frederic D. Bushman
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Terri M. Laufer
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
- Philadelphia Veterans Affairs Medical Center, Philadelphia, PA 19104
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Kim BS, Wang K, Siracusa MC, Saenz SA, Brestoff JR, Monticelli LA, Noti M, Tait Wojno ED, Fung TC, Kubo M, Artis D. Basophils promote innate lymphoid cell responses in inflamed skin. J Immunol 2014; 193:3717-25. [PMID: 25156365 DOI: 10.4049/jimmunol.1401307] [Citation(s) in RCA: 193] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Type 2 inflammation underlies allergic diseases such as atopic dermatitis, which is characterized by the accumulation of basophils and group 2 innate lymphoid cells (ILC2s) in inflamed skin lesions. Although murine studies have demonstrated that cutaneous basophil and ILC2 responses are dependent on thymic stromal lymphopoietin, whether these cell populations interact to regulate the development of cutaneous type 2 inflammation is poorly defined. In this study, we identify that basophils and ILC2s significantly accumulate in inflamed human and murine skin and form clusters not observed in control skin. We demonstrate that murine basophil responses precede ILC2 responses and that basophils are the dominant IL-4-enhanced GFP-expressing cell type in inflamed skin. Furthermore, basophils and IL-4 were necessary for the optimal accumulation of ILC2s and induction of atopic dermatitis-like disease. We show that ILC2s express IL-4Rα and proliferate in an IL-4-dependent manner. Additionally, basophil-derived IL-4 was required for cutaneous ILC2 responses in vivo and directly regulated ILC2 proliferation ex vivo. Collectively, these data reveal a previously unrecognized role for basophil-derived IL-4 in promoting ILC2 responses during cutaneous inflammation.
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Affiliation(s)
- Brian S Kim
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Kelvin Wang
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Mark C Siracusa
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Steven A Saenz
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Jonathan R Brestoff
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Laurel A Monticelli
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Mario Noti
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Elia D Tait Wojno
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Thomas C Fung
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Masato Kubo
- Laboratory for Cytokine Regulation, Research Center for Integrative Medical Science, RIKEN Yokohama Institute, Kanagawa 230-0045, Japan; Division of Molecular Pathology, Research Institute for Biomedical Science, Tokyo University of Science, Chiba 278-0022, Japan; and
| | - David Artis
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104
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von Burg N, Chappaz S, Baerenwaldt A, Horvath E, Bose Dasgupta S, Ashok D, Pieters J, Tacchini-Cottier F, Rolink A, Acha-Orbea H, Finke D. Activated group 3 innate lymphoid cells promote T-cell-mediated immune responses. Proc Natl Acad Sci U S A 2014; 111:12835-40. [PMID: 25136120 DOI: 10.1073/pnas.1406908111] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Group 3 innate lymphoid cells (ILC3s) have emerged as important cellular players in tissue repair and innate immunity. Whether these cells meaningfully regulate adaptive immune responses upon activation has yet to be explored. Here we show that upon IL-1β stimulation, peripheral ILC3s become activated, secrete cytokines, up-regulate surface MHC class II molecules, and express costimulatory molecules. ILC3s can take up latex beads, process protein antigen, and consequently prime CD4(+) T-cell responses in vitro. The cognate interaction of ILC3s and CD4(+) T cells leads to T-cell proliferation both in vitro and in vivo, whereas its disruption impairs specific T-cell and T-dependent B-cell responses in vivo. In addition, the ILC3-CD4(+) T-cell interaction is bidirectional and leads to the activation of ILC3s. Taken together, our data reveal a novel activation-dependent function of peripheral ILC3s in eliciting cognate CD4(+) T-cell immune responses.
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Seillet C, Belz GT, Mielke LA. Complexity of cytokine network regulation of innate lymphoid cells in protective immunity. Cytokine 2014; 70:1-10. [PMID: 24972988 DOI: 10.1016/j.cyto.2014.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 06/02/2014] [Indexed: 02/07/2023]
Abstract
The body's surface provides a critical barrier shielding us from various mechanical and pathogenic insults by virtue of the physical protection it provides and the presence of specialized populations of innate lymphoid cells (ILCs) that sense inflammatory signals induced by pathogens. This response plays a central role in the development and activation of early immune responses. While ILCs depend on common γ-chain cytokine signaling for their development, an essential component of the armory of these cells is their capacity to produce defensive cytokines when activated by viruses, microbes and other parasites. In this review, we describe the multiple intrinsic and extrinsic pathways that comprise the cytokine circuitry regulating the development and function of ILC necessary for protective immunity.
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Abstract
Follicular dendritic cells (FDCs) are essential for high-affinity antibody production and for the development of B cell memory. Historically, FDCs have been characterized as 'accessory' cells that passively support germinal centre (GC) responses. However, recent observations suggest that FDCs actively shape humoral immunity. In this Review, we discuss recent findings concerning the antigen acquisition and retention functions of FDCs, and relevant implications for protective immunity. Furthermore, we describe the roles of FDCs within GCs in secondary lymphoid organs and discuss FDC development within this dynamic environment. Finally, we discuss how a better understanding of FDCs could facilitate the design of next-generation vaccines.
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Pitzalis C, Jones GW, Bombardieri M, Jones SA. Ectopic lymphoid-like structures in infection, cancer and autoimmunity. Nat Rev Immunol 2014; 14:447-62. [PMID: 24948366 DOI: 10.1038/nri3700] [Citation(s) in RCA: 458] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ectopic lymphoid-like structures often develop at sites of inflammation where they influence the course of infection, autoimmune disease, cancer and transplant rejection. These lymphoid aggregates range from tight clusters of B cells and T cells to highly organized structures that comprise functional germinal centres. Although the mechanisms governing ectopic lymphoid neogenesis in human pathology remain poorly defined, the presence of ectopic lymphoid-like structures within inflamed tissues has been linked to both protective and deleterious outcomes in patients. In this Review, we discuss investigations in both experimental model systems and patient cohorts to provide a perspective on the formation and functions of ectopic lymphoid-like structures in human pathology, with particular reference to the clinical implications and the potential for therapeutic targeting.
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Affiliation(s)
- Costantino Pitzalis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London, School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Gareth W Jones
- Cardiff Institute for Infection and Immunity, The School of Medicine, Cardiff University, The Tenovus Building, Heath Campus, Cardiff CF14 4XN, Wales, UK
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London, School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Simon A Jones
- Cardiff Institute for Infection and Immunity, The School of Medicine, Cardiff University, The Tenovus Building, Heath Campus, Cardiff CF14 4XN, Wales, UK
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Abstract
Although substantial parallels have been made between transcription factor regulation of cytokine production by innate lymphoid cell (ILC) and Th cell subsets, we are still learning how ILC subsets are regulated during immune responses. Critical factors that promote ILC development and stimulate their effector functions have been identified, but mechanisms that control their homeostasis and downregulate their cytokine secretion remain poorly understood. In this review, we consider some of the potential positive and negative regulators of ILC homeostasis and function in physiological and pathological conditions.
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Affiliation(s)
- Wei Xu
- Innate Immunity Unit, Institut Pasteur, 75724 Paris, France
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Abstract
The mammalian intestine must manage to contain 100 trillion intestinal bacteria without inducing inappropriate immune responses to these microorganisms. The effects of the immune system on intestinal microorganisms are numerous and well-characterized, and recent research has determined that the microbiota influences the intestinal immune system as well. In this review, we first discuss the intestinal immune system and its role in containing and maintaining tolerance to commensal organisms. We next introduce a category of immune cells, the innate lymphoid cells, and describe their classification and function in intestinal immunology. Finally, we discuss the effects of the intestinal microbiota on innate lymphoid cells.
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Eken A, Singh AK, Treuting PM, Oukka M. IL-23R+ innate lymphoid cells induce colitis via interleukin-22-dependent mechanism. Mucosal Immunol 2014; 7:143-54. [PMID: 23715173 PMCID: PMC3834084 DOI: 10.1038/mi.2013.33] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [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: 10/12/2012] [Accepted: 04/22/2013] [Indexed: 02/07/2023]
Abstract
Polymorphisms of interleukin (IL)-23R and signaling components are associated with several autoimmune diseases, including inflammatory bowel diseases (IBD). Similar to T helper type 17 (Th17) lineage, type 3 innate lymphoid cells (ILCs) express retinoic acid-related orphan receptor γt (Rorγt) and IL-23R and hence, produce Th17-type cytokines. Recent reports implicated type 3 ILCs in IBD; however, how IL-23R signaling in these cells contributes to pathogenesis is unknown. IL-22, produced in copious amounts by type 3 ILCs, was reported to have both beneficial and pathogenic effects in adaptive, yet only a protective role in innate colitis models. Herein, by employing chronic CD45RB(high) CD4(+) T-cell transfer and anti-CD40 antibody-induced acute innate colitis models in Rag1(-/-) mice, we demonstrated opposite roles for IL-23R in colitogenesis: in the former a protective, and in the latter a pathogenic role. Furthermore, we show that IL-23R signaling promotes innate colitis via IL-22 as neutralization of IL-22 protected mice from colitis and adding back of IL-22 to IL-23R-deficient animals restored the disease. Collectively, our results reveal that similar to its controversial role during chronic or adaptive colitis, IL-22 may also have opposite roles in innate colitis pathogenesis in a context and insult-dependent manner.
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Affiliation(s)
- A Eken
- Department of Immunology, University of Washington, Seattle, Washington, USA
| | - AK Singh
- Seattle Children’s Research Institute, Center for Immunity and Immunotherapies, Seattle, Washington, USA
| | - PM Treuting
- Department of Comparative Medicine School of Medicine, University of Washington, Seattle, Washington, USA
| | - M Oukka
- Department of Immunology, University of Washington, Seattle, Washington, USA
- Seattle Children’s Research Institute, Center for Immunity and Immunotherapies, Seattle, Washington, USA
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Kain MJW, Owens BMJ. Stromal cell regulation of homeostatic and inflammatory lymphoid organogenesis. Immunology 2013; 140:12-21. [PMID: 23621403 DOI: 10.1111/imm.12119] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/07/2013] [Accepted: 04/09/2013] [Indexed: 12/22/2022] Open
Abstract
Secondary lymphoid organs function to increase the efficiency of interactions between rare, antigen-specific lymphocytes and antigen presenting cells, concentrating antigen and lymphocytes in a supportive environment that facilitates the initiation of an adaptive immune response. Homeostatic lymphoid tissue organogenesis proceeds via exquisitely controlled spatiotemporal interactions between haematopoietic lymphoid tissue inducer populations and multiple subsets of non-haematopoietic stromal cells. However, it is becoming clear that in a range of inflammatory contexts, ectopic or tertiary lymphoid tissues can develop inappropriately under pathological stress. Here we summarize the role of stromal cells in the development of homeostatic lymphoid tissue, and assess emerging evidence that suggests a critical role for stromal involvement in the tertiary lymphoid tissue development associated with chronic infections and inflammation.
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Affiliation(s)
- Matthew J W Kain
- University of Oxford Medical School, John Radcliffe Hospital, Headington, Oxford, UK
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Qiu J, Zhou L. Aryl hydrocarbon receptor promotes RORγt⁺ group 3 ILCs and controls intestinal immunity and inflammation. Semin Immunopathol 2013; 35:657-70. [PMID: 23975386 DOI: 10.1007/s00281-013-0393-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [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: 01/01/2013] [Accepted: 07/14/2013] [Indexed: 12/15/2022]
Abstract
Unlike adaptive immune cells that require antigen recognition and functional maturation during infection, innate lymphoid cells (ILCs) usually respond to pathogens promptly and serve as the first line of defense in infectious diseases. RAR-related orphan receptor (RORγt)⁺ group 3 ILCs are one of the innate cell populations that have recently been intensively studied. During the fetal stage of development, RORγt⁺ group 3 ILCs (e.g., lymphoid tissue inducer cells) are required for lymphoid organogenesis. In adult mice, RORγt⁺ group 3 ILCs are abundantly present in the gut to exert immune defensive functions. Under certain circumstances, however, RORγt⁺ group 3 ILCs can be pathogenic and contribute to intestinal inflammation. Aryl hydrocarbon receptor (Ahr), a ligand-dependent transcriptional factor, is widely expressed by various immune and non-immune cells. In the gut, the ligand for Ahr can be derived/generated from diet, microflora, and/or host cells. Ahr has been shown to regulate different cell populations in the immune system including RORγt⁺ group 3 ILCs, T helper (Th)17/22 cells, γδT cells, regulatory T cells (Tregs), Tr1 cells, and antigen presenting cells. In this review, we will focus on the development and function of RORγt⁺ group 3 ILCs, and discuss the role of Ahr in intestinal immunity and inflammation in mice and in humans. A better understanding of the function of Ahr in the gut is important for developing new therapeutic means to target Ahr in future treatment of infectious and autoimmune diseases.
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Affiliation(s)
- Ju Qiu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, 300 E. Superior Street, Chicago, IL, 60611, USA
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