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Prasad S, Singh S, Menge S, Mohapatra I, Kim S, Helland L, Singh G, Singh A. Gut redox and microbiome: charting the roadmap to T-cell regulation. Front Immunol 2024; 15:1387903. [PMID: 39234241 PMCID: PMC11371728 DOI: 10.3389/fimmu.2024.1387903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 07/31/2024] [Indexed: 09/06/2024] Open
Abstract
The gastrointestinal (GI) tract redox environment, influenced by commensal microbiota and bacterial-derived metabolites, is crucial in shaping T-cell responses. Specifically, metabolites from gut microbiota (GM) exhibit robust anti-inflammatory effects, fostering the differentiation and regulation of CD8+ tissue-resident memory (TRM) cells, mucosal-associated invariant T (MAIT) cells, and stabilizing gut-resident Treg cells. Nitric oxide (NO), a pivotal redox mediator, emerges as a central regulator of T-cell functions and gut inflammation. NO impacts the composition of the gut microbiome, driving the differentiation of pro-inflammatory Th17 cells and exacerbating intestinal inflammation, and supports Treg expansion, showcasing its dual role in immune homeostasis. This review delves into the complex interplay between GI redox balance and GM metabolites, elucidating their profound impact on T-cell regulation. Additionally, it comprehensively emphasizes the critical role of GI redox, particularly reactive oxygen species (ROS) and NO, in shaping T-cell phenotype and functions. These insights offer valuable perspectives on disease mechanisms and potential therapeutic strategies for conditions associated with oxidative stress. Understanding the complex cross-talk between GI redox, GM metabolites, and T-cell responses provides valuable insights into potential therapeutic avenues for immune-mediated diseases, underscoring the significance of maintaining GI redox balance for optimal immune health.
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Affiliation(s)
- Sujata Prasad
- Translational Division, MLM Labs, LLC, Oakdale, MN, United States
| | - Shilpi Singh
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, United States
| | - Samuel Menge
- Department of Surgery, Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, United States
| | - Iteeshree Mohapatra
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, United States
| | - Stefan Kim
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, United States
| | - Logan Helland
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, United States
| | - Gatikrushna Singh
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, United States
| | - Amar Singh
- Department of Surgery, Schulze Diabetes Institute, University of Minnesota, Minneapolis, MN, United States
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2
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Grassi F, Marino R. The P2X7 receptor in mucosal adaptive immunity. Purinergic Signal 2024; 20:9-19. [PMID: 37067746 PMCID: PMC10828151 DOI: 10.1007/s11302-023-09939-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/31/2023] [Indexed: 04/18/2023] Open
Abstract
The P2X7 receptor (P2X7R) is a widely distributed cation channel activated by extracellular ATP (eATP) with exclusive peculiarities with respect to other P2XRs. In recent years, P2X7R has been shown to regulate the adaptive immune response by conditioning T cell signaling and activation as well as polarization, lineage stability, cell death, and function in tissues. Here we revise experimental observations in this field, with a focus on adaptive immunity at mucosal sites, particularly in the gut, where eATP is hypothesized to act in the reciprocal conditioning of the host immune system and commensal microbiota to promote mutualism. The importance of P2X7R activity in the intestine is consistent with the transcriptional upregulation of P2xr7 gene by retinoic acid, a metabolite playing a key role in mucosal immunity. We emphasize the function of the eATP/P2X7R axis in controlling T follicular helper (Tfh) cell in the gut-associated lymphoid tissue (GALT) and, consequently, T-dependent secretory IgA (SIgA), with a focus on high-affinity SIgA-mediated protection from enteropathogens and shaping of a beneficial microbiota for the host.
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Affiliation(s)
- Fabio Grassi
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università Della Svizzera Italiana, 6500, Bellinzona, Switzerland.
| | - Rebecca Marino
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università Della Svizzera Italiana, 6500, Bellinzona, Switzerland
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3
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Abad C, Demeules M, Guillou C, Gondé H, Zoubairi R, Tan YV, Pinto-Espinoza C, Schäfer W, Mann AM, Vouret-Craviari V, Koch-Nolte F, Adriouch S. Administration of an AAV vector coding for a P2X7-blocking nanobody-based biologic ameliorates colitis in mice. J Nanobiotechnology 2024; 22:27. [PMID: 38212782 PMCID: PMC10785547 DOI: 10.1186/s12951-023-02285-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 12/19/2023] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND The pro-inflammatory ATP-gated P2X7 receptor is widely expressed by immune and non-immune cells. Nanobodies targeting P2X7, with potentiating or antagonistic effects, have been developed. Adeno-associated virus (AAV)-mediated gene transfer represents an efficient approach to achieve long-term in vivo expression of selected nanobody-based biologics. This approach (AAVnano) was used to validate the relevance of P2X7 as a target in dextran sodium sulfate (DSS)-induced colitis in mice. RESULTS Mice received an intramuscular injection of AAV vectors coding for potentiating (14D5-dimHLE) or antagonistic (13A7-Fc) nanobody-based biologics targeting P2X7. Long-term modulation of P2X7 activity was evaluated ex vivo from blood samples. Colitis was induced with DSS in mice injected with AAV vectors coding for nanobody-based biologics. Severity of colitis, colon histopathology and expression of chemokines and cytokines were determined to evaluate the impact of P2X7 modulation. A single injection of an AAV vector coding for 13A7-Fc or 14D5-dimHLE efficiently modulated P2X7 function in vivo from day 15 up to day 120 post-injection in a dose-dependent manner. An AAV vector coding for 13A7-Fc significantly ameliorated DSS-induced colitis and significantly reduced immune cell infiltration and expression of chemokines and proinflammatory cytokines in colonic tissue. CONCLUSIONS We have demonstrated the validity of AAVnano methodology to modulate P2X7 functions in vivo. Applying this methodological approach to a DSS-induced colitis model, we have shown that P2X7 blockade reduces inflammation and disease severity. Hence, this study confirms the importance of P2X7 as a pharmacological target and suggests the use of nanobody-based biologics as potential therapeutics in inflammatory bowel disease.
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Affiliation(s)
- Catalina Abad
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | - Mélanie Demeules
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | - Charlotte Guillou
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | - Henri Gondé
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | - Rachid Zoubairi
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | - Yossan-Var Tan
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France
| | | | - Waldemar Schäfer
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna Marei Mann
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sahil Adriouch
- Univ Rouen Normandie, INSERM, U1234, Pathophysiology Autoimmunity and Immunotherapy (PANTHER), Normandie Univ, 76000, Rouen, France.
- Faculty of Medicine and Pharmacy, INSERM U1234 - PANTHER Lab, 22 Boulevard Gambetta, CS 76183, University of Rouen, 76000, Rouen, France.
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4
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Qiu Z, Khairallah C, Chu TH, Imperato JN, Lei X, Romanov G, Atakilit A, Puddington L, Sheridan BS. Retinoic acid signaling during priming licenses intestinal CD103+ CD8 TRM cell differentiation. J Exp Med 2023; 220:e20210923. [PMID: 36809399 PMCID: PMC9960115 DOI: 10.1084/jem.20210923] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 12/02/2022] [Accepted: 02/01/2023] [Indexed: 02/23/2023] Open
Abstract
CD8 tissue-resident memory T (TRM) cells provide frontline protection at barrier tissues; however, mechanisms regulating TRM cell development are not completely understood. Priming dictates the migration of effector T cells to the tissue, while factors in the tissue induce in situ TRM cell differentiation. Whether priming also regulates in situ TRM cell differentiation uncoupled from migration is unclear. Here, we demonstrate that T cell priming in the mesenteric lymph nodes (MLN) regulates CD103+ TRM cell differentiation in the intestine. In contrast, T cells primed in the spleen were impaired in the ability to differentiate into CD103+ TRM cells after entry into the intestine. MLN priming initiated a CD103+ TRM cell gene signature and licensed rapid CD103+ TRM cell differentiation in response to factors in the intestine. Licensing was regulated by retinoic acid signaling and primarily driven by factors other than CCR9 expression and CCR9-mediated gut homing. Thus, the MLN is specialized to promote intestinal CD103+ CD8 TRM cell development by licensing in situ differentiation.
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Affiliation(s)
- Zhijuan Qiu
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Camille Khairallah
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Timothy H. Chu
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Jessica N. Imperato
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Xinyuan Lei
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Galina Romanov
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Amha Atakilit
- Lung Biology Center, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Lynn Puddington
- Department of Immunology, University of Connecticut Health, Farmington, CT, USA
| | - Brian S. Sheridan
- Department of Microbiology and Immunology, Center for Infectious Diseases, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
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5
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Jiang ZF, Wu W, Hu HB, Li ZY, Zhong M, Zhang L. P2X7 receptor as the regulator of T-cell function in intestinal barrier disruption. World J Gastroenterol 2022; 28:5265-5279. [PMID: 36185635 PMCID: PMC9521516 DOI: 10.3748/wjg.v28.i36.5265] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/20/2022] [Accepted: 09/01/2022] [Indexed: 02/06/2023] Open
Abstract
The intestinal mucosa is a highly compartmentalized structure that forms a direct barrier between the host intestine and the environment, and its dysfunction could result in a serious disease. As T cells, which are important components of the mucosal immune system, interact with gut microbiota and maintain intestinal homeostasis, they may be involved in the process of intestinal barrier dysfunction. P2X7 receptor (P2X7R), a member of the P2X receptors family, mediates the effects of extracellular adenosine triphosphate and is expressed by most innate or adaptive immune cells, including T cells. Current evidence has demonstrated that P2X7R is involved in inflammation and mediates the survival and differentiation of T lymphocytes, indicating its potential role in the regulation of T cell function. In this review, we summarize the available research about the regulatory role and mechanism of P2X7R on the intestinal mucosa-derived T cells in the setting of intestinal barrier dysfunction.
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Affiliation(s)
- Zhi-Feng Jiang
- Center of Emergency & Intensive Care Unit, Jinshan Hospital of Fudan University, Shanghai 201508, China
| | - Wei Wu
- Department of Critical Care Medicine, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Han-Bing Hu
- Center of Emergency & Intensive Care Unit, Jinshan Hospital of Fudan University, Shanghai 201508, China
| | - Zheng-Yang Li
- Department of Gastroenterology, Jinshan Hospital of Fudan University, Shanghai 201508, China
| | - Ming Zhong
- Department of Critical Care Medicine, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Lin Zhang
- Center of Emergency & Intensive Care Unit, Jinshan Hospital of Fudan University, Shanghai 201508, China
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6
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Tissue-resident memory CD8 + T cells possess unique transcriptional, epigenetic and functional adaptations to different tissue environments. Nat Immunol 2022; 23:1121-1131. [PMID: 35761084 PMCID: PMC10041538 DOI: 10.1038/s41590-022-01229-8] [Citation(s) in RCA: 94] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 04/26/2022] [Indexed: 11/08/2022]
Abstract
Tissue-resident memory T cells (TRM cells) provide protective immunity, but the contributions of specific tissue environments to TRM cell differentiation and homeostasis are not well understood. In the present study, the diversity of gene expression and genome accessibility by mouse CD8+ TRM cells from distinct organs that responded to viral infection revealed both shared and tissue-specific transcriptional and epigenetic signatures. TRM cells in the intestine and salivary glands expressed transforming growth factor (TGF)-β-induced genes and were maintained by ongoing TGF-β signaling, whereas those in the fat, kidney and liver were not. Constructing transcriptional-regulatory networks identified the transcriptional repressor Hic1 as a critical regulator of TRM cell differentiation in the small intestine and showed that Hic1 overexpression enhanced TRM cell differentiation and protection from infection. Provision of a framework for understanding how CD8+ TRM cells adapt to distinct tissue environments, and identification of tissue-specific transcriptional regulators mediating these adaptations, inform strategies to boost protective memory responses at sites most vulnerable to infection.
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7
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Cheng N, Zhang L, Liu L. Understanding the Role of Purinergic P2X7 Receptors in the Gastrointestinal System: A Systematic Review. Front Pharmacol 2021; 12:786579. [PMID: 34987401 PMCID: PMC8721002 DOI: 10.3389/fphar.2021.786579] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022] Open
Abstract
Background: The role of purinergic P2X7 receptor (P2X7R) is of interest due to its involvement in inflammation and mediating immune cell responses. P2X7R is particularly implicated in the development of inflammatory bowel disease (IBD). However, the extent of the actions of P2X7R in the gastrointestinal (GI) system under physiological and pathophysiological conditions remains to be elucidated. This systematic review aimed to identify, summarize and evaluate the evidence for a critical role of P2X7R in the GI system. Methods: We searched PubMed, Embase and Scopus with search terms pertained to P2X7R in the GI system in disease or physiological state, including “P2X7 or P2X7 receptor or purinergic signaling” in combination with any of the terms “intestine or colon or gut or gastrointestinal,” “pathology or inflammation or disease or disorder,” and “physiology or expression.” Titles and abstracts were screened for potentially eligible full texts, and animal and human studies published in English were included in this study. Data were extracted from papers meeting inclusion criteria. Meta-analysis was not feasible given the study diversity. Results: There were 48 papers included in this review. We identified 14 experimental colitis models, three sepsis models and one ischemia-reperfusion injury model. Among them, 11 studies examined P2X7R in GI infections, six studies on immune cell regulation, four studies on GI inflammation, two studies on GI malignancies, three studies involving intestinal injury due to various causes, two studies on ATP-activated P2X7R in the GI system and two studies on metabolic regulation. Conclusion: Evidence supports P2X7R mediating inflammation and immune cell responses in GI inflammation, infections and injury due to IBD and other challenges to the intestinal wall. P2X7R inhibition by gene knockout or by application of P2X7R antagonists can reduce tissue damage by suppressing inflammation. P2X7R is also implicated in GI malignancies and glucose and lipid homeostasis. P2X7R blockade, however, did not always lead to beneficial outcomes in the various pathological models of study.
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Affiliation(s)
- Nathalie Cheng
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Li Zhang
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Lu Liu
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, Australia
- *Correspondence: Lu Liu,
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8
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Er-Lukowiak M, Duan Y, Rassendren F, Ulmann L, Nicke A, Ufer F, Friese MA, Koch-Nolte F, Magnus T, Rissiek B. A P2rx7 Passenger Mutation Affects the Vitality and Function of T cells in Congenic Mice. iScience 2020; 23:101870. [PMID: 33336163 PMCID: PMC7733020 DOI: 10.1016/j.isci.2020.101870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/26/2020] [Accepted: 11/23/2020] [Indexed: 12/20/2022] Open
Abstract
Among laboratory mouse strains many genes are differentially expressed in the same cell population. As consequence, gene targeting in 129-derived embryonic stem cells (ESCs) and backcrossing the modified mice onto the C57BL/6 background can introduce passenger mutations in the close proximity of the targeted gene. Here, we demonstrate that several transgenic mice carry a P2rx7 passenger mutation that affects the function of T cells. By the example of P2rx4tm1Rass we demonstrate that P2X4ko T cells express higher levels of P2X7 and are more sensitive toward the P2X7 activators ATP and NAD+, rendering these cells more vulnerable toward NAD-induced cell death (NICD) compared with wild type (WT). The enhanced NICD sensitivity confounded functional assays e.g. cytokine production and cell migration. Our results need to be considered when working with P2rx4tm1Rass mice or other 129-based transgenic strains that target P2rx7 neighboring genes. T cells from 129 mice express higher level of P2X7 compared with T cells from B6 mice P2rx4tm1Rass T cells express high level of P2X7 due to a P2rx7 passenger mutation P2rx4tm1Rass T cells are highly susceptible to NAD-induced cell death (NICD) NICD susceptibility of P2rx4tm1Rass T cells confounds the outcome of functional assays
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Affiliation(s)
- Marco Er-Lukowiak
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg-Eppendorf, Germany
| | - Yinghui Duan
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg-Eppendorf, Germany
| | - Francois Rassendren
- IGF, Univ. Montpellier, CNRS, INSERM, 34094 Montpellier, France.,LabEx ICST, 34094 Montpellier, France
| | - Lauriane Ulmann
- IGF, Univ. Montpellier, CNRS, INSERM, 34094 Montpellier, France.,LabEx ICST, 34094 Montpellier, France
| | - Annette Nicke
- Walther Straub Institute for Pharmacology and Toxicology, Ludwig-Maximilians-Universität München, 80336 Munich, Germany
| | - Friederike Ufer
- Institute of Neuroimmunology und Multiple Sclerosis (INIMS), University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Manuel A Friese
- Institute of Neuroimmunology und Multiple Sclerosis (INIMS), University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Tim Magnus
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg-Eppendorf, Germany
| | - Björn Rissiek
- Department of Neurology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg-Eppendorf, Germany
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9
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Rivas-Yáñez E, Barrera-Avalos C, Parra-Tello B, Briceño P, Rosemblatt MV, Saavedra-Almarza J, Rosemblatt M, Acuña-Castillo C, Bono MR, Sauma D. P2X7 Receptor at the Crossroads of T Cell Fate. Int J Mol Sci 2020; 21:E4937. [PMID: 32668623 PMCID: PMC7404255 DOI: 10.3390/ijms21144937] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 06/26/2020] [Accepted: 07/07/2020] [Indexed: 02/06/2023] Open
Abstract
The P2X7 receptor is a ligand-gated, cation-selective channel whose main physiological ligand is ATP. P2X7 receptor activation may also be triggered by ARTC2.2-dependent ADP ribosylation in the presence of extracellular NAD. Upon activation, this receptor induces several responses, including the influx of calcium and sodium ions, phosphatidylserine externalization, the formation of a non-selective membrane pore, and ultimately cell death. P2X7 receptor activation depends on the availability of extracellular nucleotides, whose concentrations are regulated by the action of extracellular nucleotidases such as CD39 and CD38. The P2X7 receptor has been extensively studied in the context of the immune response, and it has been reported to be involved in inflammasome activation, cytokine production, and the migration of different innate immune cells in response to ATP. In adaptive immune responses, the P2X7 receptor has been linked to T cell activation, differentiation, and apoptosis induction. In this review, we will discuss the evidence of the role of the P2X7 receptor on T cell differentiation and in the control of T cell responses in inflammatory conditions.
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Affiliation(s)
- Elizabeth Rivas-Yáñez
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
| | - Carlos Barrera-Avalos
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile;
| | - Brian Parra-Tello
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
| | - Pedro Briceño
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
| | - Mariana V. Rosemblatt
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago 7510157, Chile
| | - Juan Saavedra-Almarza
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
| | - Mario Rosemblatt
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago 7510157, Chile
- Fundación Ciencia & Vida, Santiago 7780272, Chile
| | - Claudio Acuña-Castillo
- Centro de Biotecnología Acuícola, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - María Rosa Bono
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
| | - Daniela Sauma
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile; (E.R.-Y.); (B.P.-T.); (P.B.); (M.V.R.); (J.S.-A.); (M.R.)
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10
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Grassi F. The P2X7 Receptor as Regulator of T Cell Development and Function. Front Immunol 2020; 11:1179. [PMID: 32587592 PMCID: PMC7297980 DOI: 10.3389/fimmu.2020.01179] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/13/2020] [Indexed: 12/24/2022] Open
Abstract
Unique structural features characterize the P2X7 receptor with respect to other P2X family members. Dual gating by eATP and regulated expression of P2X7 can imprint distinct outcomes to the T cell depending on the metabolic fitness and/or developmental stage. In the thymus, signaling by P2X7 contributes to γδ T cell lineage choice. In secondary lymphoid organs, P2X7 stimulation promotes Th1/Th17 polarization of CD4+ naïve cells, Tregs conversion to Th17 cells and cell death of Tfh cells that are not stimulated by cognate antigen. Moreover, P2X7 stimulation in eATP rich microenvironments, such as damaged and/or inflamed tissues as well as tumors, induces cell death of various T cell effector subsets.
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Affiliation(s)
- Fabio Grassi
- Faculty of Biomedical Sciences, Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
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11
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Bovens AA, Wesselink TH, Behr FM, Kragten NAM, van Lier RAW, van Gisbergen KPJM, Stark R. Murine iNKT cells are depleted by liver damage via activation of P2RX7. Eur J Immunol 2020; 50:1515-1524. [PMID: 32390174 DOI: 10.1002/eji.201948509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/21/2020] [Accepted: 05/05/2020] [Indexed: 02/06/2023]
Abstract
Invariant natural killer T cells (iNKT) constitute up to 50% of liver lymphocytes and contribute to immunosurveillance as well as pathogenesis of the liver. Systemic activation of iNKT cells induces acute immune-mediated liver injury. However, how tissue damage events regulate iNKT cell function and homeostasis remains unclear. We found that specifically tissue-resident iNKT cells in liver and spleen express the tissue-damage receptor P2RX7 and the P2RX7-activating ectoenzyme ARTC2. P2RX7 expression restricted formation of iNKT cells in the liver suggesting that liver iNKT cells are actively restrained under homeostatic conditions. Deliberate activation of P2RX7 in vivo by exogenous NAD resulted in a nearly complete iNKT cell ablation in liver and spleen in a P2RX7-dependent manner. Tissue damage generated by acetaminophen-induced liver injury reduced the number of iNKT cells in the liver. The tissue-damage-induced iNKT cell depletion was driven by P2RX7 and localized to the site of injury, as iNKT cells in the spleen remained intact. The depleted liver iNKT cells reconstituted only slowly compared to other lymphocytes such as regulatory T cells. These findings suggest that tissue-damage-mediated depletion of iNKT cells acts as a feedback mechanism to limit iNKT cell-induced pathology resulting in the establishment of a tolerogenic environment.
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Affiliation(s)
- Astrid A Bovens
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Thomas H Wesselink
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Felix M Behr
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Department of Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Natasja A M Kragten
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - René A W van Lier
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Klaas P J M van Gisbergen
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Regina Stark
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Department of Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, BIH Center for Regenerative Therapies, Berlin, Germany
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12
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Stark R, Wesselink TH, Behr FM, Kragten NAM, Arens R, Koch-Nolte F, van Gisbergen KPJM, van Lier RAW. T RM maintenance is regulated by tissue damage via P2RX7. Sci Immunol 2019; 3:3/30/eaau1022. [PMID: 30552101 DOI: 10.1126/sciimmunol.aau1022] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 11/13/2018] [Indexed: 12/16/2022]
Abstract
Tissue-resident memory T cells (TRM) are noncirculating immune cells that contribute to the first line of local defense against reinfections. Their location at hotspots of pathogen encounter frequently exposes TRM to tissue damage. This history of danger-signal exposure is an important aspect of TRM-mediated immunity that has been overlooked so far. RNA profiling revealed that TRM from liver and small intestine express P2RX7, a damage/danger-associated molecular pattern (DAMP) receptor that is triggered by extracellular nucleotides (ATP, NAD+). We confirmed that P2RX7 protein was expressed in CD8+ TRM but not in circulating T cells (TCIRC) across different infection models. Tissue damage induced during routine isolation of liver lymphocytes led to P2RX7 activation and resulted in selective cell death of TRM P2RX7 activation in vivo by exogenous NAD+ led to a specific depletion of TRM while retaining TCIRC The effect was absent in P2RX7-deficient mice and after P2RX7 blockade. TCR triggering down-regulated P2RX7 expression and made TRM resistant to NAD-induced cell death. Physiological triggering of P2RX7 by sterile tissue damage during acetaminophen-induced liver injury led to a loss of previously acquired pathogen-specific local TRM in wild-type but not in P2RX7 KO T cells. Our results highlight P2RX7-mediated signaling as a critical pathway for the regulation of TRM maintenance. Extracellular nucleotides released during infection and tissue damage could deplete TRM locally and free niches for new and infection-relevant specificities. This suggests that the recognition of tissue damage promotes persistence of antigen-specific over bystander TRM in the tissue niche.
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Affiliation(s)
- Regina Stark
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands. .,Department of Experimental Immunology, Amsterdam UMC, Amsterdam, Netherlands
| | - Thomas H Wesselink
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Felix M Behr
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam UMC, Amsterdam, Netherlands
| | - Natasja A M Kragten
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Ramon Arens
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, Netherlands
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Klaas P J M van Gisbergen
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam UMC, Amsterdam, Netherlands
| | - René A W van Lier
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam UMC, Amsterdam, Netherlands
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13
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Liu Q, Kim CH. Control of Tissue-Resident Invariant NKT Cells by Vitamin A Metabolites and P2X7-Mediated Cell Death. THE JOURNAL OF IMMUNOLOGY 2019; 203:1189-1197. [PMID: 31308092 DOI: 10.4049/jimmunol.1900398] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 06/21/2019] [Indexed: 12/11/2022]
Abstract
Invariant NKT (iNKT) cells provide rapid innate T cell responses to glycolipid Ags from host cells and microbes. The numbers of CD1d-restricted iNKT cells are tightly controlled in mucosal tissues, but the mechanisms have been largely unclear. We found that vitamin A is a dominant factor that controls the population size of mucosal iNKT cells in mice. This negative regulation is mediated by the induction of the purinergic receptor P2X7 on iNKT cells. The expression of P2X7 is particularly high on intestinal iNKT cells, making iNKT cells highly susceptible to P2X7-mediated cell death. In vitamin A deficiency, iNKT cells fail to express P2X7 and are, therefore, resistant to P2X7-mediated cell death, leading to iNKT cell overpopulation. This phenomenon is most prominent in the intestine. We found that iNKT cells are divided into CD69+ sphingosine-1-phosphate receptor 1 (S1P1)- tissue resident and CD69- S1P1+ nonresident iNKT cells. The CD69+ S1P1- tissue-resident iNKT cells highly express P2X7 and are effectively controlled by the P2X7 pathway. The regulation of iNKT cells by vitamin A by the P2X7 pathway is important to prevent aberrant expansion of effector cytokine-producing iNKT cells. Our findings identify a novel role of vitamin A in regulating iNKT cell homeostasis in many tissues throughout the body.
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Affiliation(s)
- Qingyang Liu
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109; Mary H. Weiser Food Allergy Center, University of Michigan School of Medicine, Ann Arbor, MI 48109; and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI 48109
| | - Chang H Kim
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109; Mary H. Weiser Food Allergy Center, University of Michigan School of Medicine, Ann Arbor, MI 48109; and Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI 48109
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14
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Borges da Silva H, Wang H, Qian LJ, Hogquist KA, Jameson SC. ARTC2.2/P2RX7 Signaling during Cell Isolation Distorts Function and Quantification of Tissue-Resident CD8 + T Cell and Invariant NKT Subsets. THE JOURNAL OF IMMUNOLOGY 2019; 202:2153-2163. [PMID: 30777922 DOI: 10.4049/jimmunol.1801613] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 01/22/2019] [Indexed: 12/19/2022]
Abstract
Peripheral invariant NKT cells (iNKT) and CD8+ tissue-resident memory T cells (TRM) express high levels of the extracellular ATP receptor P2RX7 in mice. High extracellular ATP concentrations or NAD-mediated P2RX7 ribosylation by the enzyme ARTC2.2 can induce P2RX7 pore formation and cell death. Because both ATP and NAD are released during tissue preparation for analysis, cell death through these pathways may compromise the analysis of iNKT and CD8+ TRM Indeed, ARTC2.2 blockade enhanced recovery of viable liver iNKT and TRM The expression of ARTC2.2 and P2RX7 on distinct iNKT subsets and TRM is unclear, however, as is the impact of recovery from other nonlymphoid sites. In this study, we performed a comprehensive analysis of ARTC2.2 and P2RX7 expression in iNKT and CD8+ T cells in diverse tissues, at steady-state and after viral infection. NKT1 cells and CD8+ TRM express high levels of both ARTC2.2 and P2RX7 compared with NKT2, NKT17, and CD8+ circulating memory subsets. Using nanobody-mediated ARTC2.2 antagonism, we showed that ARTC2.2 blockade enhanced NKT1 and TRM recovery from nonlymphoid tissues during cell preparation. Moreover, blockade of this pathway was essential to preserve functionality, viability, and proliferation of both populations. We also showed that short-term direct P2RX7 blockade enhanced recovery of TRM, although to a lesser degree. In summary, our data show that short-term in vivo blockade of the ARTC2.2/P2RX7 axis permits much improved flow cytometry-based phenotyping and enumeration of murine iNKT and TRM from nonlymphoid tissues, and it represents a crucial step for functional studies of these populations.
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Affiliation(s)
- Henrique Borges da Silva
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455
| | - Haiguang Wang
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455
| | - Lily J Qian
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455
| | - Kristin A Hogquist
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455
| | - Stephen C Jameson
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455
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15
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Mellouk A, Bobé P. CD8 +, but not CD4 + effector/memory T cells, express the CD44 highCD45RB high phenotype with aging, which displays reduced expression levels of P2X 7 receptor and ATP-induced cellular responses. FASEB J 2018; 33:3225-3236. [PMID: 30383448 DOI: 10.1096/fj.201800867r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Previously we reported that the sensitivity of CD4+ T cells to ATP does not depend on P2X7 receptor (P2X7R) expression levels but on their activation and differentiation stages. Therefore, here we have investigated a potential relationship between the sensitivity of CD8+ T cells to ATP and their stages of differentiation. Thus, the CD8+ subpopulation exhibits a drastically reduced sensitivity to ATP with aging, which parallels the strong increase of an effector/memory CD8+ subset expressing high levels of CD44 cell adhesion molecule and CD45RB transmembrane phosphatase (CD44hiCD45RBhi). Using l-selectin/CD62L, CC-chemokine receptor 7, and CD127/IL-7 receptor-α markers, we showed that effector/memory CD8+ T cells belong to a central or effector memory subset. In contrast, the CD44hiCD45RBhi effector/memory subset is absent or poorly expressed in the CD4+ T subpopulation regardless of age. While ATP treatment can trigger channel and pore formation, CD62L shedding, phosphatidylserine exposure, and cell death in the CD44loCD45RBhi-naive CD8+ subset, it is unable to induce these cellular activities in the CD44hiCD45RBhi effector/memory CD8+ subset. Importantly, both CD44loCD45RBhi-naive and CD44hiCD45RBhi effector/memory subsets express similar low levels of P2X7R, demonstrating that the sensitivity of CD8+ T cells to ATP depends on the stage of differentiation instead of P2X7R expression levels.-Mellouk, A., Bobé, P. CD8+, but not CD4+ effector/memory T cells, express the CD44highCD45RBhigh phenotype with aging, which displays reduced expression levels of P2X7 receptor and ATP-induced cellular responses.
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Affiliation(s)
- Amine Mellouk
- INSERM, Université Paris-Sud, Université Paris-Saclay, Unité Mixte de Recherche (UMR) 1174, Orsay, France
| | - Pierre Bobé
- INSERM, Université Paris-Sud, Université Paris-Saclay, Unité Mixte de Recherche (UMR) 1174, Orsay, France
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16
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Georgiev H, Ravens I, Papadogianni G, Malissen B, Förster R, Bernhardt G. Blocking the ART2.2/P2X7-system is essential to avoid a detrimental bias in functional CD4 T cell studies. Eur J Immunol 2018; 48:1078-1081. [PMID: 29508376 DOI: 10.1002/eji.201747420] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/06/2018] [Accepted: 02/27/2018] [Indexed: 11/10/2022]
Abstract
Murine T cell subsets differ in their expression level of P2X7. Depending on several parameters like extracellular NAD+ , P2X7 can be ADP-ribosylated rapidly by adjacent ARTC2.2 resulting in susceptibilities to apoptosis to a varying extent. This detrimental effect can be prevented when drugs like KN-62 are present during cell preparations.
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Affiliation(s)
- Hristo Georgiev
- Institute of Immunology, Hannover Medical School, Hannover, Germany
| | - Inga Ravens
- Institute of Immunology, Hannover Medical School, Hannover, Germany
| | | | | | - Reinhold Förster
- Institute of Immunology, Hannover Medical School, Hannover, Germany
| | - Günter Bernhardt
- Institute of Immunology, Hannover Medical School, Hannover, Germany
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17
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Safya H, Mellouk A, Legrand J, Le Gall SM, Benbijja M, Kanellopoulos-Langevin C, Kanellopoulos JM, Bobé P. Variations in Cellular Responses of Mouse T Cells to Adenosine-5'-Triphosphate Stimulation Do Not Depend on P2X7 Receptor Expression Levels but on Their Activation and Differentiation Stage. Front Immunol 2018. [PMID: 29535730 PMCID: PMC5835135 DOI: 10.3389/fimmu.2018.00360] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
A previous report has shown that regulatory T cells (Treg) were markedly more sensitive to adenosine-5′-triphosphate (ATP) than conventional T cells (Tconv). Another one has shown that Tregs and CD45RBlow Tconvs, but not CD45RBhigh Tconvs, displayed similar high sensitivity to ATP. We have previously reported that CD45RBlow Tconvs expressing B220/CD45RABC molecules in a pre-apoptotic stage are resistant to ATP stimulation due to the loss of P2X7 receptor (P2X7R) membrane expression. To gain a clearer picture on T-cell sensitivity to ATP, we have quantified four different cellular activities triggered by ATP in mouse T cells at different stages of activation/differentiation, in correlation with levels of P2X7R membrane expression. P2X7R expression significantly increases on Tconvs during differentiation from naive CD45RBhighCD44low to effector/memory CD45RBlowCD44high stage. Maximum levels of upregulation are reached on recently activated CD69+ naive and memory Tconvs. Ectonucleotidases CD39 and CD73 expression levels increase in parallel with those of P2X7R. Recently activated CD69+ CD45RBhighCD44low Tconvs, although expressing high levels of P2X7R, fail to cleave homing receptor CD62L after ATP treatment, but efficiently form pores and externalize phosphatidylserine (PS). In contrast, naive CD45RBhighCD44low Tconvs cleave CD62L with high efficiency although they express a lower level of P2X7, thus suggesting that P2X7R levels are not a limiting factor for signaling ATP-induced cellular responses. Contrary to common assumption, P2X7R-mediated cellular activities in mouse Tconvs are not triggered in an all-or-none manner, but depend on their stage of activation/differentiation. Compared to CD45RBlow Tconvs, CD45RBlowFoxp3+ Tregs show significantly higher levels of P2X7R membrane expression and of sensitivity to ATP as evidenced by their high levels of CD62L shedding, pore formation and PS externalization observed after ATP treatment. In summary, the different abilities of ATP-treated Tconvs to form pore or cleave CD62L depending on their activation and differentiation state suggests that P2X7R signaling varies according to the physiological role of T convs during antigen activation in secondary lymphoid organs or trafficking to inflammatory sites.
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Affiliation(s)
- Hanaa Safya
- UMR1174, INSERM, Université Paris-Sud, Orsay, France
| | - Amine Mellouk
- UMR1174, INSERM, Université Paris-Sud, Orsay, France
| | - Julie Legrand
- Institut André Lwoff, CNRS, Université Paris-Sud, Villejuif, France
| | - Sylvain M Le Gall
- Institut André Lwoff, CNRS, Université Paris-Sud, Villejuif, France.,UMR 970, INSERM, Université Paris Descartes, Paris, France
| | - Mohcine Benbijja
- Institut André Lwoff, CNRS, Université Paris-Sud, Villejuif, France.,UMR 1012, INSERM, Université Paris-Sud, Le Kremlin Bicêtre, France
| | | | | | - Pierre Bobé
- UMR1174, INSERM, Université Paris-Sud, Orsay, France.,Institut André Lwoff, CNRS, Université Paris-Sud, Villejuif, France
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18
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Retinoic acid takes effector T cells to the gallows: P2X7, the molecular hangman. Mucosal Immunol 2017; 10:884-886. [PMID: 28051090 DOI: 10.1038/mi.2016.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Effector T-cell contraction is one of the primary means by which immune homeostasis in the peripheral tissues is reestablished following an inflammatory response. In this issue of Mucosal Immunology, Hashimoto-Hill et al.1 show that retinoic acid (RA) transcriptionally upregulates P2X7 primarily in effector T cells of the intestine sensitizing them to NAD-induced cell death (NICD); thus, demonstrating a previously unrecognized role of RA in effector T-cell contraction.
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19
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Hashimoto-Hill S, Friesen L, Kim M, Kim CH. Contraction of intestinal effector T cells by retinoic acid-induced purinergic receptor P2X7. Mucosal Immunol 2017; 10:912-923. [PMID: 27966552 PMCID: PMC5471139 DOI: 10.1038/mi.2016.109] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/28/2016] [Indexed: 02/04/2023]
Abstract
The intestinal environment harbors a large number of activated T cells, which are potentially inflammatory. To prevent inflammatory responses, intestinal T cells are controlled by various tolerogenic mechanisms, including T-cell apoptosis. We investigated the expression mechanism and function of the purinergic receptor P2X7 in contraction of intestinal CD4+ effector T cells. We found that P2X7 upregulation on CD4+ effector T cells is induced by retinoic acid through retinoic acid receptor α binding to an intragenic enhancer region of the P2rx7 gene. P2X7 is highly expressed by most intestinal αβ and γδ T cells, including T-helper type 1 (Th1) and Th17 cells. The intestinal effector T cells are effectively deleted by P2X7 activation-dependent apoptosis. Moreover, P2X7 activation suppressed T-cell-induced colitis in Rag1-/- mice. The data from vitamin A-deficient and P2rx7-/- mice indicate that the retinoic acid-P2X7 pathway is important in preventing aberrant buildup of activated T cells. We conclude that retinoic acid controls intestinal effector T-cell populations by inducing P2X7 expression. These findings have important ramifications in preventing inflammatory diseases in the intestine.
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Affiliation(s)
- S. Hashimoto-Hill
- Laboratory of Immunology and Hematopoiesis, Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907
| | - L. Friesen
- Laboratory of Immunology and Hematopoiesis, Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907,Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - M. Kim
- Laboratory of Immunology and Hematopoiesis, Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907
| | - C. H. Kim
- Laboratory of Immunology and Hematopoiesis, Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907,Purdue Institute of Inflammation, Immunology and Infectious Diseases, Purdue University, West Lafayette, IN 47907,Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907,Purdue Center for Cancer Research, Purdue University, West Lafayette, IN 47907
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20
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Abstract
The P2X7 receptor is a trimeric ion channel gated by extracellular adenosine 5'-triphosphate. The receptor is present on an increasing number of different cells types including stem, blood, glial, neural, ocular, bone, dental, exocrine, endothelial, muscle, renal and skin cells. The P2X7 receptor induces various downstream events in a cell-specific manner, including inflammatory molecule release, cell proliferation and death, metabolic events, and phagocytosis. As such this receptor plays important roles in heath and disease. Increasing knowledge about the P2X7 receptor has been gained from studies of, but not limited to, protein chemistry including cloning, site-directed mutagenesis, crystal structures and atomic modeling, as well as from studies of primary tissues and transgenic mice. This chapter focuses on the P2X7 receptor itself. This includes the P2RX7 gene and its products including splice and polymorphic variants. This chapter also reviews modulators of P2X7 receptor activation and inhibition, as well as the transcriptional regulation of the P2RX7 gene via its promoter and enhancer regions, and by microRNA and long-coding RNA. Furthermore, this chapter discusses the post-translational modification of the P2X7 receptor by N-linked glycosylation, adenosine 5'-diphosphate ribosylation and palmitoylation. Finally, this chapter reviews interaction partners of the P2X7 receptor, and its cellular localisation and trafficking within cells.
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Affiliation(s)
- Ronald Sluyter
- School of Biological Sciences, University of Wollongong, Wollongong, NSW, 2522, Australia. .,Centre for Medical and Molecular Bioscience, University of Wollongong, Wollongong, NSW, 2522, Australia. .,Illawarra Health and Medical Research Institute, Wollongong, NSW, 2522, Australia.
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21
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Figliuolo VR, Chaves SP, Savio LEB, Thorstenberg MLP, Machado Salles É, Takiya CM, D'Império-Lima MR, de Matos Guedes HL, Rossi-Bergmann B, Coutinho-Silva R. The role of the P2X7 receptor in murine cutaneous leishmaniasis: aspects of inflammation and parasite control. Purinergic Signal 2016; 13:143-152. [PMID: 27866341 DOI: 10.1007/s11302-016-9544-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 10/25/2016] [Indexed: 11/28/2022] Open
Abstract
Leishmania amazonensis is the etiological agent of diffuse cutaneous leishmaniasis. The immunopathology of leishmaniasis caused by L. amazonensis infection is dependent on the pathogenic role of effector CD4+ T cells. Purinergic signalling has been implicated in resistance to infection by different intracellular parasites. In this study, we evaluated the role of the P2X7 receptor in modulating the immune response and susceptibility to infection by L. amazonensis. We found that P2X7-deficient mice are more susceptible to L. amazonensis infection than wild-type (WT) mice. P2X7 deletion resulted in increased lesion size and parasite load. Our histological analysis showed an increase in cell infiltration in infected footpads of P2X7-deficient mice. Analysis of the cytokine profile in footpad homogenates showed increased levels of IFN-γ and decreased TGF-β production in P2X7-deficient mice, suggesting an exaggerated pro-inflammatory response. In addition, we observed that CD4+ and CD8+ T cells from infected P2X7-deficient mice exhibit a higher proliferative capacity than infected WT mice. These data suggest that P2X7 receptor plays a key role in parasite control by regulating T effector cells and inflammation during L. amazonensis infection.
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Affiliation(s)
- Vanessa Ribeiro Figliuolo
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Science and Technology for Translational Research in Health and Environment in the Amazon Region (INPeTAm), Rio de Janeiro, Brazil
| | - Suzana Passos Chaves
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Science and Technology for Translational Research in Health and Environment in the Amazon Region (INPeTAm), Rio de Janeiro, Brazil
| | - Luiz Eduardo Baggio Savio
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Science and Technology for Translational Research in Health and Environment in the Amazon Region (INPeTAm), Rio de Janeiro, Brazil
| | - Maria Luiza Prates Thorstenberg
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil
| | | | - Christina Maeda Takiya
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil
| | | | - Herbert Leonel de Matos Guedes
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Bartira Rossi-Bergmann
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Science and Technology for Translational Research in Health and Environment in the Amazon Region (INPeTAm), Rio de Janeiro, Brazil
| | - Robson Coutinho-Silva
- Institute of Biophysics Carlos Chagas Filho, IBCCF/Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, 21941-902, Brazil. .,National Institute of Science and Technology for Translational Research in Health and Environment in the Amazon Region (INPeTAm), Rio de Janeiro, Brazil. .,Instituto de Biofísica Carlos Chagas Filho - UFRJ, Edifício do Centro de Ciências da Saúde, Bloco G. Av. Carlos Chagas Filho, 373. Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil.
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22
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Takenaka MC, Robson S, Quintana FJ. Regulation of the T Cell Response by CD39. Trends Immunol 2016; 37:427-439. [PMID: 27236363 DOI: 10.1016/j.it.2016.04.009] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 04/22/2016] [Accepted: 04/25/2016] [Indexed: 12/22/2022]
Abstract
The ectonucleoside triphosphate diphosphohydrolase 1 (ENTPD1, or CD39) catalyzes the phosphohydrolysis of extracellular ATP (eATP) and ADP (eADP) released under conditions of inflammatory stress and cell injury. CD39 generates AMP, which is in turn used by the ecto-5'-nucleotidase CD73 to synthesize adenosine. These ectonucleotidases have a major impact on the dynamic equilibrium of proinflammatory eATP and ADP nucleotides versus immunosuppressive adenosine nucleosides. Indeed, CD39 plays a dominant role in the purinergic regulation of inflammation and the immune response because its expression is influenced by genetic and environmental factors. We review the specific role of CD39 in the kinetic regulation of cellular immune responses in the evolution of disease. We focus on the effects of CD39 on T cells and explore potential clinical applications in autoimmunity, chronic infections, and cancer.
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Affiliation(s)
- Maisa C Takenaka
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Simon Robson
- Divisions of Gastroenterology, Hepatology, and Transplantation, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Francisco J Quintana
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA.
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23
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IRF8 Transcription-Factor-Dependent Classical Dendritic Cells Are Essential for Intestinal T Cell Homeostasis. Immunity 2016; 44:860-74. [DOI: 10.1016/j.immuni.2016.02.008] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/16/2015] [Accepted: 02/09/2016] [Indexed: 02/07/2023]
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Lack of a Functioning P2X7 Receptor Leads to Increased Susceptibility to Toxoplasmic Ileitis. PLoS One 2015; 10:e0129048. [PMID: 26053862 PMCID: PMC4460092 DOI: 10.1371/journal.pone.0129048] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 05/04/2015] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Oral infection of C57BL/6J mice with the protozoan parasite Toxoplasma gondii leads to a lethal inflammatory ileitis. PRINCIPAL FINDINGS Mice lacking the purinergic receptor P2X7R are acutely susceptible to toxoplasmic ileitis, losing significantly more weight than C57BL/6J mice and exhibiting much greater intestinal inflammatory pathology in response to infection with only 10 cysts of T. gondii. This susceptibility is not dependent on the ability of P2X7R-deficient mice to control the parasite, which they accomplish just as efficiently as C57BL/6J mice. Rather, susceptibility is associated with elevated ileal concentrations of pro-inflammatory cytokines, reactive nitrogen intermediates and altered regulation of elements of NFκB activation in P2X7R-deficient mice. CONCLUSIONS Our data support the thesis that P2X7R, a well-documented activator of pro-inflammatory cytokine production, also plays an important role in the regulation of intestinal inflammation.
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Rissiek B, Haag F, Boyer O, Koch-Nolte F, Adriouch S. P2X7 on Mouse T Cells: One Channel, Many Functions. Front Immunol 2015; 6:204. [PMID: 26042119 PMCID: PMC4436801 DOI: 10.3389/fimmu.2015.00204] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/14/2015] [Indexed: 12/12/2022] Open
Abstract
The P2X7 receptor is an adenosine triphosphate (ATP)-gated cation channel that is expressed by several cells of the immune system. P2X7 is best known for its proinflammatory role in promoting inflammasome formation and release of mature interleukin (IL)-1β by innate immune cells. Mounting evidence indicates that P2X7 is also an important regulatory receptor of murine and human T cell functions. Murine T cells express a sensitive splice variant of P2X7 that can be activated either by non-covalent binding of ATP or, in the presence of nicotinamide adenine dinucleotide, by its covalent ADP-ribosylation catalyzed by the ecto-ADP-ribosyltransferase ARTC2.2. Prolonged activation of P2X7 by either one of these pathways triggers the induction of T cell death. Conversely, lower concentrations of ATP can activate P2X7 to enhance T cell proliferation and production of IL-2. In this review, we will highlight the molecular and cellular consequences of P2X7 activation on mouse T cells and its versatile role in T cell homeostasis and activation. Further, we will discuss important differences in the function of P2X7 on human and murine T cells.
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Affiliation(s)
- Björn Rissiek
- Insitute of Immunology, University Medical Center , Hamburg , Germany ; Department of Neurology, University Medical Center , Hamburg , Germany
| | - Friedrich Haag
- Insitute of Immunology, University Medical Center , Hamburg , Germany
| | - Olivier Boyer
- U905, INSERM , Rouen , France ; Institute for Research and Innovation in Biomedicine (IRIB), Normandy University , Rouen , France ; Department of Immunology, Rouen University Hospital , Rouen , France
| | | | - Sahil Adriouch
- U905, INSERM , Rouen , France ; Institute for Research and Innovation in Biomedicine (IRIB), Normandy University , Rouen , France
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CD38 is expressed on inflammatory cells of the intestine and promotes intestinal inflammation. PLoS One 2015; 10:e0126007. [PMID: 25938500 PMCID: PMC4418770 DOI: 10.1371/journal.pone.0126007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 03/27/2015] [Indexed: 12/20/2022] Open
Abstract
The enzyme CD38 is expressed on a variety of hematopoietic and non-hematopoietic cells and is involved in diverse processes such as generation of calcium-mobilizing metabolites, cell activation, and chemotaxis. Here, we show that under homeostatic conditions CD38 is highly expressed on immune cells of the colon mucosa of C57BL/6 mice. Myeloid cells recruited to this tissue upon inflammation also express enhanced levels of CD38. To determine the role of CD38 in intestinal inflammation, we applied the dextran sulfate sodium (DSS) colitis model. Whereas wild-type mice developed severe colitis, CD38-/- mice had only mild disease following DSS-treatment. Histologic examination of the colon mucosa revealed pronounced inflammatory damage with dense infiltrates containing numerous granulocytes and macrophages in wild-type animals, while these findings were significantly attenuated in CD38-/- mice. Despite attenuated histological findings, the mRNA expression of inflammatory cytokines and chemokines was only marginally lower in the colons of CD38-/- mice as compared to wild-type mice. In conclusion, our results identify a function for CD38 in the control of inflammatory processes in the colon.
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Burnstock G, Boeynaems JM. Purinergic signalling and immune cells. Purinergic Signal 2014; 10:529-64. [PMID: 25352330 PMCID: PMC4272370 DOI: 10.1007/s11302-014-9427-2] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 09/12/2013] [Indexed: 11/28/2022] Open
Abstract
This review article provides a historical perspective on the role of purinergic signalling in the regulation of various subsets of immune cells from early discoveries to current understanding. It is now recognised that adenosine 5'-triphosphate (ATP) and other nucleotides are released from cells following stress or injury. They can act on virtually all subsets of immune cells through a spectrum of P2X ligand-gated ion channels and G protein-coupled P2Y receptors. Furthermore, ATP is rapidly degraded into adenosine by ectonucleotidases such as CD39 and CD73, and adenosine exerts additional regulatory effects through its own receptors. The resulting effect ranges from stimulation to tolerance depending on the amount and time courses of nucleotides released, and the balance between ATP and adenosine. This review identifies the various receptors involved in the different subsets of immune cells and their effects on the function of these cells.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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Kurashima Y, Amiya T, Fujisawa K, Shibata N, Suzuki Y, Kogure Y, Hashimoto E, Otsuka A, Kabashima K, Sato S, Sato T, Kubo M, Akira S, Miyake K, Kunisawa J, Kiyono H. The enzyme Cyp26b1 mediates inhibition of mast cell activation by fibroblasts to maintain skin-barrier homeostasis. Immunity 2014; 40:530-41. [PMID: 24726878 DOI: 10.1016/j.immuni.2014.01.014] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 01/15/2014] [Indexed: 01/27/2023]
Abstract
Mast cells (MCs) mature locally, thus possessing tissue-dependent phenotypes for their critical roles in both protective immunity against pathogens and the development of allergy or inflammation. We previously reported that MCs highly express P2X7, a receptor for extracellular ATP, in the colon but not in the skin. The ATP-P2X7 pathway induces MC activation and consequently exacerbates the inflammation. Here, we identified the mechanisms by which P2X7 expression on MCs is reduced by fibroblasts in the skin, but not in the other tissues. The retinoic-acid-degrading enzyme Cyp26b1 is highly expressed in skin fibroblasts, and its inhibition resulted in the upregulation of P2X7 on MCs. We also noted the increased expression of P2X7 on skin MCs and consequent P2X7- and MC-dependent dermatitis (so-called retinoid dermatitis) in the presence of excessive amounts of retinoic acid. These results demonstrate a unique skin-barrier homeostatic network operating through Cyp26b1-mediated inhibition of ATP-dependent MC activation by fibroblasts.
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Affiliation(s)
- Yosuke Kurashima
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan; Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan
| | - Takeaki Amiya
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan
| | - Kumiko Fujisawa
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan
| | - Naoko Shibata
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan
| | - Yuji Suzuki
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Yuta Kogure
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan
| | - Eri Hashimoto
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan
| | - Atsushi Otsuka
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto 606-8501, Japan
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto 606-8501, Japan
| | - Shintaro Sato
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan
| | - Takeshi Sato
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan
| | - 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 Biological Sciences, Tokyo University of Sciences, Chiba 278-0022, Japan
| | - Shizuo Akira
- Laboratory of Host Defense, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
| | - Kensuke Miyake
- Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Jun Kunisawa
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan; Laboratory of Vaccine Materials, National Institute of Biomedical Innovation, Osaka 567-0085, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan; International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Department of Microbiology and Immunology, Kobe University School of Medicine, Kobe 650-0017, Japan.
| | - Hiroshi Kiyono
- Division of Mucosal Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo 102-0075, Japan; Department of Medical Genome Science, Graduate School of Frontier Science, The University of Tokyo, Chiba 277-8561, Japan; International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.
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Overexpression of ATP-activated P2X7 receptors in the intestinal mucosa is implicated in the pathogenesis of Crohn's disease. Inflamm Bowel Dis 2014; 20:444-57. [PMID: 24412990 DOI: 10.1097/01.mib.0000441201.10454.06] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Extracellular nucleotides released in conditions of cell stress alert the immune system from tissue injury or inflammation. We hypothesized that the P2X7 receptor (P2X7-R) could regulate key elements in inflammatory bowel disease pathogenesis. METHODS Colonoscopy samples obtained from patients with Crohn's disease (CD), ulcerative colitis, and controls were used to analyze P2X7-R expression by RT and real-time PCR, immunohistochemistry, and confocal microscopy. Inflammatory response was determined by the levels of cytokines by enzyme-linked immunosorbent assay in cultures of intestinal explants. Apoptosis was determined by the TUNEL assay. P2X7-R C57BL/6 mice were treated with trinitrobenzene sulfonic acid or dextran sulfate sodium (DSS) for inducing colitis. RESULTS P2X7-R was expressed in higher levels in inflamed CD epithelium and lamina propria, where it colocalizes more with dendritic cells and macrophages. Basal levels of P2X7-R mRNA were higher in CD inflamed mucosa compared with noninflamed CD and controls and were upregulated after interferon-γ in controls. Apoptotic rates were higher in CD epithelium and lamina propria compared with ulcerative colitis and controls. Levels of tumor necrosis factor-α, interleukin (IL)-1β, and IL-17 were higher, whereas IL-10 was lower in CD compared with controls. Levels of tumor necrosis factor-α-α and interleukin-1β increased after adenosine-triphosphate and decreased after KN62 treatment in CD. P2X7-R animals did not develop trinitrobenzene sulfonic acid or DSS colitis. CONCLUSIONS The upregulation of P2X7-R in CD inflamed mucosa is consistent with the involvement of purinoceptors in inflammation and apoptosis. These observations may implicate purinergic signaling in the pathogenesis of intestinal inflammation, and the P2X7-R may represent a novel therapeutic target in CD.
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Kusu T, Kayama H, Kinoshita M, Jeon SG, Ueda Y, Goto Y, Okumura R, Saiga H, Kurakawa T, Ikeda K, Maeda Y, Nishimura JI, Arima Y, Atarashi K, Honda K, Murakami M, Kunisawa J, Kiyono H, Okumura M, Yamamoto M, Takeda K. Ecto-nucleoside triphosphate diphosphohydrolase 7 controls Th17 cell responses through regulation of luminal ATP in the small intestine. THE JOURNAL OF IMMUNOLOGY 2012; 190:774-83. [PMID: 23241884 DOI: 10.4049/jimmunol.1103067] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Extracellular ATP is released from live cells in controlled conditions, as well as dying cells in inflammatory conditions, and, thereby, regulates T cell responses, including Th17 cell induction. The level of extracellular ATP is closely regulated by ATP hydrolyzing enzymes, such as ecto-nucleoside triphosphate diphosphohydrolases (ENTPDases). ENTPDase1/CD39, which is expressed in immune cells, was shown to regulate immune responses by downregulating the ATP level. In this study, we analyzed the immunomodulatory function of ENTPDase7, which is preferentially expressed in epithelial cells in the small intestine. The targeted deletion of Entpd7 encoding ENTPDase7 in mice resulted in increased ATP levels in the small intestinal lumen. The number of Th17 cells was selectively increased in the small intestinal lamina propria in Entpd7(-/-) mice. Th17 cells were decreased by oral administration of antibiotics or the ATP antagonist in Entpd7(-/-) mice, indicating that commensal microbiota-dependent ATP release mediates the enhanced Th17 cell development in the small intestinal lamina propria of Entpd7(-/-) mice. In accordance with the increased number of small intestinal Th17 cells, Entpd7(-/-) mice were resistant to oral infection with Citrobacter rodentium. Entpd7(-/-) mice suffered from severe experimental autoimmune encephalomyelitis, which was associated with increased numbers of CD4(+) T cells producing both IL-17 and IFN-γ. Taken together, these findings demonstrate that ENTPDase7 controls the luminal ATP level and, thereby, regulates Th17 cell development in the small intestine.
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Affiliation(s)
- Takashi Kusu
- Laboratory of Immune Regulation, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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Extracellular ATP induces cell death in human intestinal epithelial cells. Biochim Biophys Acta Gen Subj 2012; 1820:1867-78. [PMID: 22951220 DOI: 10.1016/j.bbagen.2012.08.013] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 07/15/2012] [Accepted: 08/14/2012] [Indexed: 12/20/2022]
Abstract
BACKGROUND Extracellular ATP is an endogenous signaling molecule released by various cell types and under different stimuli. High concentrations of ATP released into the extracellular medium activate the P2X7 receptor in most inflammatory conditions. Here, we seek to characterize the effects of ATP in human intestinal epithelial cells and to evaluate morphological changes in these cells in the presence of ATP. METHODS We treated human intestinal epithelial cells with ATP and evaluated the effects of this nucleotide by scanning and transmission electron microscopy analysis and calcium measurements. We used flow cytometry to evaluate apoptosis. We collected human intestinal explants for immunohistochemistry, apoptosis by the TUNEL approach and caspase-3 activity using flow cytometry analyses. We also evaluated the ROS production by flow cytometry and NO secretion by the Griess technique. RESULTS ATP treatment induced changes characteristic of cell death by apoptosis and autophagy but not necrosis in the HCT8 cell line. ATP induced apoptosis in human intestinal explants that showed TUNEL-positive cells in the epithelium and in the lamina propria. The explants exhibited a significant increase of caspase-3 activity when the colonic epithelial cells were incubated with IFN-gamma followed by ATP as compared to control cells. In addition, it was found that antioxidants were able to inhibit both the ROS production and the apoptosis induced by ATP in epithelial cells. GENERAL SIGNIFICANCE The activation of P2X7 receptors by ATP induces apoptosis and autophagy in human epithelial cells, possibly via ROS production, and this effect might have implications for gut inflammatory conditions.
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Théâtre E, Frederix K, Guilmain W, Delierneux C, Lecut C, Bettendorff L, Bours V, Oury C. Overexpression of CD39 in mouse airways promotes bacteria-induced inflammation. THE JOURNAL OF IMMUNOLOGY 2012; 189:1966-74. [PMID: 22802412 DOI: 10.4049/jimmunol.1102600] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In airways, the ecto-nucleoside triphosphate diphosphohydrolase CD39 plays a central role in the regulation of physiological mucosal nucleotide concentrations and likely contributes to the control of inflammation because accelerated ATP metabolism occurs in chronic inflammatory lung diseases. We sought to determine whether constant elevated CD39 activity in lung epithelia is sufficient to cause inflammation and whether this affects the response to acute LPS or Pseudomonas aeruginosa exposure. We generated transgenic mice overexpressing human CD39 under the control of the airway-specific Clara cell 10-kDa protein gene promoter. Transgenic mice did not develop any spontaneous lung inflammation. However, intratracheal instillation of LPS resulted in accelerated recruitment of neutrophils to the airways of transgenic mice. Macrophage clearance was delayed, and the amounts of CD8(+) T and B cells were augmented. Increased levels of keratinocyte chemoattractant, IL-6, and RANTES were produced in transgenic lungs. Similarly, higher numbers of neutrophils and macrophages were found in the lungs of transgenic mice infected with P. aeruginosa, which correlated with improved bacteria clearance. The transgenic phenotype was partially and differentially restored by coinstillation of P2X(1) or P2X(7) receptor antagonists or of caffeine with LPS. Thus, a chronic increase of epithelial CD39 expression and activity promotes airway inflammation in response to bacterial challenge by enhancing P1 and P2 receptor activation.
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Affiliation(s)
- Emilie Théâtre
- Interdisciplinary Cluster of Applied Genoproteomics-Inflammation, Infection, Immunity, Unit of Human Genetics, Laboratory of Thrombosis and Haemostasis, University of Liège, Liège 4000, Belgium
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Abstract
Since 1929, when it was discovered that ATP is a substrate for muscle contraction, the knowledge about this purine nucleotide has been greatly expanded. Many aspects of cell metabolism revolve around ATP production and consumption. It is important to understand the concepts of glucose and oxygen consumption in aerobic and anaerobic life and to link bioenergetics with the vast amount of reactions occurring within cells. ATP is universally seen as the energy exchange factor that connects anabolism and catabolism but also fuels processes such as motile contraction, phosphorylations, and active transport. It is also a signalling molecule in the purinergic signalling mechanisms. In this review, we will discuss all the main mechanisms of ATP production linked to ADP phosphorylation as well the regulation of these mechanisms during stress conditions and in connection with calcium signalling events. Recent advances regarding ATP storage and its special significance for purinergic signalling will also be reviewed.
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Tran JNSN, Pupovac A, Taylor RM, Wiley JS, Byrne SN, Sluyter R. Murine epidermal Langerhans cells and keratinocytes express functional P2X7 receptors. Exp Dermatol 2011; 19:e151-7. [PMID: 20113349 DOI: 10.1111/j.1600-0625.2009.01029.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Extracellular ATP via the activation of purinergic P2 receptors has an emerging role in cutaneous biology; however, the distribution of these receptors in mouse skin is poorly defined. This study investigated whether murine epidermal cell subpopulations express functional purinergic P2X(7) receptors. P2X(7) expression was examined by immunoblotting and immunofluorescence staining of epidermal cells from C57Bl/6 mice. P2X(7) function was evaluated by nucleotide-induced ethidium(+) uptake measurements in epidermal cells from C57Bl/6 mice, and from P2X(7) deficient mice and wild-type littermate controls. P2X(7) was detected in whole epidermal cell preparations, and specifically on Langerhans cells (LCs) and keratinocytes (KCs). ATP induced ethidium(+) uptake into LCs and KCs, with EC(50) values of 503 and 482 microm, respectively. BzATP, and to a lesser extent ATPgammaS and ADP, also induced ethidium(+) uptake; while UTP, alphabeta-meth-ATP and NAD were ineffective. ATP-induced ethidium(+) uptake was impaired by Na(+) and Mg(2+), and the P2X(7) antagonist, A-438079 and was absent in LCs and KCs from P2X(7) deficient mice. These results demonstrate that murine LCs and KCs express functional P2X(7), and support a role for this receptor in cutaneous biology.
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Affiliation(s)
- Jimmy N S N Tran
- Department of Medicine, Nepean Clinical School, University of Sydney, Penrith, NSW, Australia
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Wilhelm K, Ganesan J, Müller T, Dürr C, Grimm M, Beilhack A, Krempl CD, Sorichter S, Gerlach UV, Jüttner E, Zerweck A, Gärtner F, Pellegatti P, Di Virgilio F, Ferrari D, Kambham N, Fisch P, Finke J, Idzko M, Zeiser R. Graft-versus-host disease is enhanced by extracellular ATP activating P2X7R. Nat Med 2010; 16:1434-8. [PMID: 21102458 DOI: 10.1038/nm.2242] [Citation(s) in RCA: 351] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Accepted: 09/10/2010] [Indexed: 12/11/2022]
Abstract
Danger signals released upon cell damage can cause excessive immune-mediated tissue destruction such as that found in acute graft-versus-host disease (GVHD), allograft rejection and systemic inflammatory response syndrome. Given that ATP is found in small concentrations in the extracellular space under physiological conditions, and its receptor P2X(7)R is expressed on several immune cell types, ATP could function as a danger signal when released from dying cells. We observed increased ATP concentrations in the peritoneal fluid after total body irradiation, and during the development of GVHD in mice and in humans. Stimulation of antigen-presenting cells (APCs) with ATP led to increased expression of CD80 and CD86 in vitro and in vivo and actuated a cascade of proinflammatory events, including signal transducer and activator of transcription-1 (STAT1) phosphorylation, interferon-γ (IFN-γ) production and donor T cell expansion, whereas regulatory T cell numbers were reduced. P2X(7)R expression increased when GVHD evolved, rendering APCs more responsive to the detrimental effects of ATP, thereby providing positive feedback signals. ATP neutralization, early P2X(7)R blockade or genetic deficiency of P2X(7)R during GVHD development improved survival without immune paralysis. These data have major implications for transplantation medicine, as pharmacological interference with danger signals that act via P2X(7)R could lead to the development of tolerance without the need for intensive immunosuppression.
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Affiliation(s)
- Konrad Wilhelm
- Department of Hematology and Oncology, Freiburg University Medical Center, Albert-Ludwigs-University, Freiburg, Germany
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Jamieson SE, Peixoto-Rangel AL, Hargrave AC, Roubaix LAD, Mui EJ, Boulter NR, Miller EN, Fuller SJ, Wiley JS, Castellucci L, Boyer K, Peixe RG, Kirisits MJ, Elias LDS, Coyne JJ, Correa-Oliveira R, Sautter M, Smith NC, Lees MP, Swisher CN, Heydemann P, Noble AG, Patel D, Bardo D, Burrowes D, McLone D, Roizen N, Withers S, Bahia-Oliveira LMG, McLeod R, Blackwell JM. Evidence for associations between the purinergic receptor P2X(7) (P2RX7) and toxoplasmosis. Genes Immun 2010; 11:374-83. [PMID: 20535134 PMCID: PMC2908187 DOI: 10.1038/gene.2010.31] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Congenital Toxoplasma gondii infection can result in intracranial calcification, hydrocephalus, and retinochoroiditis. Acquired infection is commonly associated with ocular disease. Pathology is characterized by strong pro-inflammatory responses. Ligation of ATP by purinergic receptor P2X7, encoded by P2RX7, stimulates pro-inflammatory cytokines and can lead directly to killing of intracellular pathogens. To determine whether P2X7 plays a role in susceptibility to congenital toxoplasmosis, we examined polymorphisms at P2RX7 in 149 child/parent trios from North America. We found association (FBAT Z scores ±2.429; P= 0.015) between the derived C(+)G(−) allele (f= 0.68; OR= 2.06; 95% CI: 1.14–3.75) at SNP rs1718119 (1068T>C; Thr-348-Ala), and a second synonymous variant rs1621388 in linkage disequilibrium with it, and clinical signs of disease per se. Analysis of clinical sub-groups showed no association with hydrocephalus, with effect sizes for associations with retinal disease and brain calcifications enhanced (OR=3.0 to 4.25; 0.004<P<0.009) when hydrocephalus was removed from the analysis. Association with toxoplasmic retinochoroiditis was replicated (FBAT Z scores ±3.089; P= 0.002) in a small family-based study (60 families; 68 affected offspring) of acquired infection in Brazil, where the ancestral T(+) allele (f= 0.296) at SNP rs1718119 was strongly protective (OR= 0.27; 95% CI: 0.09–0.80). (Words 194)
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Affiliation(s)
- S E Jamieson
- Cambridge Institute for Medical Research and Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge, UK
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Ring S, Enk AH, Mahnke K. ATP activates regulatory T Cells in vivo during contact hypersensitivity reactions. THE JOURNAL OF IMMUNOLOGY 2010; 184:3408-16. [PMID: 20208014 DOI: 10.4049/jimmunol.0901751] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs) require activation to develop their full suppressive capacity. Similar to conventional T cells, Tregs can be activated via their TCRs; however, other means may be in place. We injected naive and nonactivated Tregs, being CD69(-)CD44(low)CD62L(+) into mice, and analyzed their phenotype after sensitization or challenge with the contact sensitizer 2,4,6-trinitro-1-chlorobenzene. We found that Tregs acquired an activated phenotype (CD69(+)CD44(high)CD62L(-)) in the draining lymph node after sensitization. In contrast, Ag challenge activated Tregs in the blood. This tissue-specific activation was induced by ATP, which was released at the respective tissue sites after sensitization or challenge, respectively. To demonstrate that activation was also essential for the induction of the suppressive function of Tregs, Tregs were treated with ATP receptor antagonists. In this study, we show that ATP receptor antagonists abrogated the suppressive effects of injected naive Tregs in contact hypersensitivity reactions. Thus, these data indicate that activation of Tregs via ATP in vivo provides a novel pathway of stimulating the suppressive function of Tregs.
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Affiliation(s)
- Sabine Ring
- Department of Dermatology, University Hospital Heidelberg, Heidelberg, Germany.
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Lecut C, Frederix K, Johnson DM, Deroanne C, Thiry M, Faccinetto C, Marée R, Evans RJ, Volders PGA, Bours V, Oury C. P2X1 ion channels promote neutrophil chemotaxis through Rho kinase activation. THE JOURNAL OF IMMUNOLOGY 2009; 183:2801-9. [PMID: 19635923 DOI: 10.4049/jimmunol.0804007] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
ATP, released at the leading edge of migrating neutrophils, amplifies chemotactic signals. The aim of our study was to investigate whether neutrophils express ATP-gated P2X(1) ion channels and whether these channels could play a role in chemotaxis. Whole-cell patch clamp experiments showed rapidly desensitizing currents in both human and mouse neutrophils stimulated with P2X(1) agonists, alphabeta-methylene ATP (alphabetaMeATP) and betagammaMeATP. These currents were strongly impaired or absent in neutrophils from P2X(1)(-/-) mice. In Boyden chamber assays, alphabetaMeATP provoked chemokinesis and enhanced formylated peptide- and IL-8-induced chemotaxis of human neutrophils. This agonist similarly increased W-peptide-induced chemotaxis of wild-type mouse neutrophils, whereas it had no effect on P2X(1)(-/-) neutrophils. In human as in mouse neutrophils, alphabetaMeATP selectively activated the small RhoGTPase RhoA that caused reversible myosin L chain phosphorylation. Moreover, the alphabetaMeATP-elicited neutrophil movements were prevented by the two Rho kinase inhibitors, Y27632 and H1152. In a gradient of W-peptide, P2X(1)(-/-) neutrophils migrated with reduced speed and displayed impaired trailing edge retraction. Finally, neutrophil recruitment in mouse peritoneum upon Escherichia coli injection was enhanced in wild-type mice treated with alphabetaMeATP, whereas it was significantly impaired in the P2X(1)(-/-) mice. Thus, activation of P2X(1) ion channels by ATP promotes neutrophil chemotaxis, a process involving Rho kinase-dependent actomyosin-mediated contraction at the cell rear. These ion channels may therefore play a significant role in host defense and inflammation.
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Affiliation(s)
- Christelle Lecut
- GIGA-Research Human Genetics Unit, University of Liège, Liège, Belgium
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van Wijk F, Cheroutre H. Intestinal T cells: facing the mucosal immune dilemma with synergy and diversity. Semin Immunol 2009; 21:130-8. [PMID: 19386513 DOI: 10.1016/j.smim.2009.03.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Accepted: 03/23/2009] [Indexed: 12/22/2022]
Abstract
The epithelium of the gastrointestinal tract, which represents the greatest body surface area exposed to the outside environment, is confronted with a plethora of foreign and potentially harmful antigens. Consequently, the immune system of the gut faces the daunting task of distinguishing harmless dietary proteins and commensal bacteria from potentially dangerous pathogens, and of then responding accordingly. Mucosal T cells play a central role in maintaining barrier function and controlling the delicate balance between immune activation and immune tolerance. This review will focus on the unique features of mucosal T cell subsets that reside in the epithelium and lamina propria of the gut.
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Affiliation(s)
- Femke van Wijk
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
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