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Li H, Fletcher-Etherington A, Hunter LM, Keshri S, Fielding CA, Nightingale K, Ravenhill B, Nobre L, Potts M, Antrobus R, Crump CM, Rubinsztein DC, Stanton RJ, Weekes MP. Human cytomegalovirus degrades DMXL1 to inhibit autophagy, lysosomal acidification, and viral assembly. Cell Host Microbe 2024; 32:466-478.e11. [PMID: 38479395 DOI: 10.1016/j.chom.2024.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 01/10/2024] [Accepted: 02/20/2024] [Indexed: 04/13/2024]
Abstract
Human cytomegalovirus (HCMV) is an important human pathogen that regulates host immunity and hijacks host compartments, including lysosomes, to assemble virions. We combined a quantitative proteomic analysis of HCMV infection with a database of proteins involved in vacuolar acidification, revealing Dmx-like protein-1 (DMXL1) as the only protein that acidifies vacuoles yet is degraded by HCMV. Systematic comparison of viral deletion mutants reveals the uncharacterized 7 kDa US33A protein as necessary and sufficient for DMXL1 degradation, which occurs via recruitment of the E3 ubiquitin ligase Kip1 ubiquitination-promoting complex (KPC). US33A-mediated DMXL1 degradation inhibits lysosome acidification and autophagic cargo degradation. Formation of the virion assembly compartment, which requires lysosomes, occurs significantly later with US33A-expressing virus infection, with reduced viral replication. These data thus identify a viral strategy for cellular remodeling, with the potential to employ US33A in therapies for viral infection or rheumatic conditions, in which inhibition of lysosome acidification can attenuate disease.
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Affiliation(s)
- Hanqi Li
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Alice Fletcher-Etherington
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Leah M Hunter
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Swati Keshri
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; UK Dementia Institute, University of Cambridge, The Keith Peters Building, Hills Road, Cambridge CB2 0XY, UK
| | - Ceri A Fielding
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Katie Nightingale
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Benjamin Ravenhill
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Luis Nobre
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Martin Potts
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Robin Antrobus
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; Department of Medicine, University of Cambridge, Hills Road, Cambridge CB2 2QQ, UK
| | - Colin M Crump
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge, UK
| | - David C Rubinsztein
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK; UK Dementia Institute, University of Cambridge, The Keith Peters Building, Hills Road, Cambridge CB2 0XY, UK
| | - Richard J Stanton
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Michael P Weekes
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK.
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Hunter LM, Kite J, Fletcher-Etherington A, Nightingale K, Nobre L, Antrobus R, Fielding CA, Stanton RJ, Weekes MP. HCMV US2 co-opts TRC8 to degrade the endoplasmic reticulum-resident protein LMAN2L. J Gen Virol 2024; 105:001980. [PMID: 38687323 PMCID: PMC11083459 DOI: 10.1099/jgv.0.001980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 04/12/2024] [Indexed: 05/02/2024] Open
Abstract
The human cytomegalovirus (HCMV) pUS2 glycoprotein exploits the host's endoplasmic reticulum (ER)-associated degradation (ERAD) pathway to degrade major histocompatibility complex class I (MHC-I) and prevent antigen presentation. Beyond MHC-I, pUS2 has been shown to target a range of cellular proteins for degradation, preventing their cell surface expression. Here we have identified a novel pUS2 target, ER-resident protein lectin mannose binding 2 like (LMAN2L). pUS2 expression was both necessary and sufficient for the downregulation of LMAN2L, which was dependent on the cellular E3 ligase TRC8. Given the hypothesized role of LMAN2L in the trafficking of glycoproteins, we employed proteomic plasma membrane profiling to measure LMAN2L-dependent changes at the cell surface. A known pUS2 target, integrin alpha-6 (ITGA6), was downregulated from the surface of LMAN2L-deficient cells, but not other integrins. Overall, these results suggest a novel strategy of pUS2-mediated protein degradation whereby pUS2 targets LMAN2L to impair trafficking of ITGA6. Given that pUS2 can directly target other integrins, we propose that this single viral protein may exhibit both direct and indirect mechanisms to downregulate key cell surface molecules.
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Affiliation(s)
- Leah M. Hunter
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Joanne Kite
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Alice Fletcher-Etherington
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Katie Nightingale
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Luis Nobre
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Robin Antrobus
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
| | - Ceri A. Fielding
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Richard J. Stanton
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Michael P. Weekes
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 2QQ, UK
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Vlachava VM, Seirafian S, Fielding CA, Kollnberger S, Aicheler RJ, Hughes J, Baker A, Weekes MP, Forbes S, Wilkinson GWG, Wang ECY, Stanton RJ. HCMV-secreted glycoprotein gpUL4 inhibits TRAIL-mediated apoptosis and NK cell activation. Proc Natl Acad Sci U S A 2023; 120:e2309077120. [PMID: 38011551 PMCID: PMC10710050 DOI: 10.1073/pnas.2309077120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 10/07/2023] [Indexed: 11/29/2023] Open
Abstract
Human cytomegalovirus (HCMV) is a paradigm of pathogen immune evasion and sustains lifelong persistent infection in the face of exceptionally powerful host immune responses through the concerted action of multiple immune-evasins. These reduce NK cell activation by inhibiting ligands for activating receptors, expressing ligands for inhibitory receptors, or inhibiting synapse formation. However, these functions only inhibit direct interactions with the infected cell. To determine whether the virus also expresses soluble factors that could modulate NK function at a distance, we systematically screened all 170 HCMV canonical protein-coding genes. This revealed that UL4 encodes a secreted and heavily glycosylated protein (gpUL4) that is expressed with late-phase kinetics and is capable of inhibiting NK cell degranulation. Analyses of gpUL4 binding partners by mass spectrometry identified an interaction with TRAIL. gpUL4 bound TRAIL with picomolar affinity and prevented TRAIL from binding its receptor, thus acting as a TRAIL decoy receptor. TRAIL is found in both soluble and membrane-bound forms, with expression of the membrane-bound form strongly up-regulated on NK cells in response to interferon. gpUL4 inhibited apoptosis induced by soluble TRAIL, while also binding to the NK cell surface in a TRAIL-dependent manner, where it blocked NK cell degranulation and cytokine secretion. gpUL4 therefore acts as an immune-evasin by inhibiting both soluble and membrane-bound TRAIL and is a viral-encoded TRAIL decoy receptor. Interestingly, gpUL4 could also suppress NK responses to heterologous viruses, suggesting that it may act as a systemic virally encoded immunosuppressive agent.
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Affiliation(s)
- Virginia-Maria Vlachava
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Sepehr Seirafian
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Ceri A Fielding
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Simon Kollnberger
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Rebecca J Aicheler
- Department of Biomedical Sciences, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, United Kingdom
| | - Joseph Hughes
- Centre for Virus Research, School of Infection & Immunity, Glasgow University, Glasgow G61 1QH, United Kingdom
| | - Alexander Baker
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Michael P Weekes
- Cambridge Institute for Medical Research, Department of Medicine, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Simone Forbes
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Gavin W G Wilkinson
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Eddie C Y Wang
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Richard J Stanton
- Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
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Rubina A, Patel M, Nightingale K, Potts M, Fielding CA, Kollnberger S, Lau B, Ladell K, Miners KL, Nichols J, Nobre L, Roberts D, Trinca TM, Twohig JP, Vlahava VM, Davison AJ, Price DA, Tomasec P, Wilkinson GWG, Weekes MP, Stanton RJ, Wang ECY. ADAM17 targeting by human cytomegalovirus remodels the cell surface proteome to simultaneously regulate multiple immune pathways. Proc Natl Acad Sci U S A 2023; 120:e2303155120. [PMID: 37561786 PMCID: PMC10438378 DOI: 10.1073/pnas.2303155120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/23/2023] [Indexed: 08/12/2023] Open
Abstract
Human cytomegalovirus (HCMV) is a major human pathogen whose life-long persistence is enabled by its remarkable capacity to systematically subvert host immune defenses. In exploring the finding that HCMV infection up-regulates tumor necrosis factor receptor 2 (TNFR2), a ligand for the pro-inflammatory antiviral cytokine TNFα, we found that the underlying mechanism was due to targeting of the protease, A Disintegrin And Metalloproteinase 17 (ADAM17). ADAM17 is the prototype 'sheddase', a family of proteases that cleaves other membrane-bound proteins to release biologically active ectodomains into the supernatant. HCMV impaired ADAM17 surface expression through the action of two virally-encoded proteins in its UL/b' region, UL148 and UL148D. Proteomic plasma membrane profiling of cells infected with an HCMV double-deletion mutant for UL148 and UL148D with restored ADAM17 expression, combined with ADAM17 functional blockade, showed that HCMV stabilized the surface expression of 114 proteins (P < 0.05) in an ADAM17-dependent fashion. These included reported substrates of ADAM17 with established immunological functions such as TNFR2 and jagged1, but also numerous unreported host and viral targets, such as nectin1, UL8, and UL144. Regulation of TNFα-induced cytokine responses and NK inhibition during HCMV infection were dependent on this impairment of ADAM17. We therefore identify a viral immunoregulatory mechanism in which targeting a single sheddase enables broad regulation of multiple critical surface receptors, revealing a paradigm for viral-encoded immunomodulation.
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Affiliation(s)
- Anzelika Rubina
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Mihil Patel
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Katie Nightingale
- Cambridge Institute for Medical Research, University of Cambridge, CambridgeCB2 0XY, United Kingdom
| | - Martin Potts
- Cambridge Institute for Medical Research, University of Cambridge, CambridgeCB2 0XY, United Kingdom
- Department of Medicine, University of Cambridge, CambridgeCB2 0XY, United Kingdom
| | - Ceri A. Fielding
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Simon Kollnberger
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Betty Lau
- Centre for Virus Research, University of Glasgow, GlasgowG12 8TA, United Kingdom
| | - Kristin Ladell
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Kelly L. Miners
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Jenna Nichols
- Centre for Virus Research, University of Glasgow, GlasgowG12 8TA, United Kingdom
| | - Luis Nobre
- Cambridge Institute for Medical Research, University of Cambridge, CambridgeCB2 0XY, United Kingdom
| | - Dawn Roberts
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Terrence M. Trinca
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Jason P. Twohig
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Virginia-Maria Vlahava
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Andrew J. Davison
- Centre for Virus Research, University of Glasgow, GlasgowG12 8TA, United Kingdom
| | - David A. Price
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Peter Tomasec
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Gavin W. G. Wilkinson
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Michael P. Weekes
- Cambridge Institute for Medical Research, University of Cambridge, CambridgeCB2 0XY, United Kingdom
- Department of Medicine, University of Cambridge, CambridgeCB2 0XY, United Kingdom
| | - Richard J. Stanton
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
| | - Eddie C. Y. Wang
- Division of Infection and Immunity, School of Medicine, Cardiff University, CardiffCF14 4XN, United Kingdom
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Grant MD, Bentley K, Fielding CA, Hatfield KM, Ings DP, Harnum D, Wang EC, Stanton RJ, Holder KA. Combined anti-S1 and anti-S2 antibodies from hybrid immunity elicit potent cross-variant ADCC against SARS-CoV-2. JCI Insight 2023; 8:e170681. [PMID: 37338994 PMCID: PMC10445686 DOI: 10.1172/jci.insight.170681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/15/2023] [Indexed: 06/22/2023] Open
Abstract
Antibodies capable of neutralizing SARS-CoV-2 are well studied, but Fc receptor-dependent antibody activities that can also significantly impact the course of infection have not been studied in such depth. Since most SARS-CoV-2 vaccines induce only anti-spike antibodies, here we investigated spike-specific antibody-dependent cellular cytotoxicity (ADCC). Vaccination produced antibodies that weakly induced ADCC; however, antibodies from individuals who were infected prior to vaccination (hybrid immunity) elicited strong anti-spike ADCC. Quantitative and qualitative aspects of humoral immunity contributed to this capability, with infection skewing IgG antibody production toward S2, vaccination skewing toward S1, and hybrid immunity evoking strong responses against both domains. A combination of antibodies targeting both spike domains support strong antibody-dependent NK cell activation, with 3 regions of antibody reactivity outside the receptor-binding domain (RBD) corresponding with potent anti-spike ADCC. Consequently, ADCC induced by hybrid immunity with ancestral antigen was conserved against variants containing neutralization escape mutations in the RBD. Induction of antibodies recognizing a broad range of spike epitopes and eliciting strong and durable ADCC may partially explain why hybrid immunity provides superior protection against infection and disease compared with vaccination alone, and it demonstrates that spike-only subunit vaccines would benefit from strategies that induce combined anti-S1 and anti-S2 antibody responses.
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Affiliation(s)
- Michael D. Grant
- Immunology and Infectious Diseases Program, Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada
| | - Kirsten Bentley
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Ceri A. Fielding
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Keeley M. Hatfield
- Immunology and Infectious Diseases Program, Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada
| | - Danielle P. Ings
- Immunology and Infectious Diseases Program, Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada
| | - Debbie Harnum
- Eastern Health Regional Health Authority, St. John’s, Newfoundland, Canada
| | - Eddie C.Y. Wang
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Richard J. Stanton
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Kayla A. Holder
- Immunology and Infectious Diseases Program, Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada
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Ashley CL, McSharry BP, McWilliam HEG, Stanton RJ, Fielding CA, Mathias RA, Fairlie DP, McCluskey J, Villadangos JA, Rossjohn J, Abendroth A, Slobedman B. Suppression of MR1 by human cytomegalovirus inhibits MAIT cell activation. Front Immunol 2023; 14:1107497. [PMID: 36845106 PMCID: PMC9950634 DOI: 10.3389/fimmu.2023.1107497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 01/25/2023] [Indexed: 02/12/2023] Open
Abstract
Introduction The antigen presentation molecule MHC class I related protein-1 (MR1) is best characterized by its ability to present bacterially derived metabolites of vitamin B2 biosynthesis to mucosal-associated invariant T-cells (MAIT cells). Methods Through in vitro human cytomegalovirus (HCMV) infection in the presence of MR1 ligand we investigate the modulation of MR1 expression. Using coimmunoprecipitation, mass spectrometry, expression by recombinant adenovirus and HCMV deletion mutants we investigate HCMV gpUS9 and its family members as potential regulators of MR1 expression. The functional consequences of MR1 modulation by HCMV infection are explored in coculture activation assays with either Jurkat cells engineered to express the MAIT cell TCR or primary MAIT cells. MR1 dependence in these activation assays is established by addition of MR1 neutralizing antibody and CRISPR/Cas-9 mediated MR1 knockout. Results Here we demonstrate that HCMV infection efficiently suppresses MR1 surface expression and reduces total MR1 protein levels. Expression of the viral glycoprotein gpUS9 in isolation could reduce both cell surface and total MR1 levels, with analysis of a specific US9 HCMV deletion mutant suggesting that the virus can target MR1 using multiple mechanisms. Functional assays with primary MAIT cells demonstrated the ability of HCMV infection to inhibit bacterially driven, MR1-dependent activation using both neutralizing antibodies and engineered MR1 knockout cells. Discussion This study identifies a strategy encoded by HCMV to disrupt the MR1:MAIT cell axis. This immune axis is less well characterized in the context of viral infection. HCMV encodes hundreds of proteins, some of which regulate the expression of antigen presentation molecules. However the ability of this virus to regulate the MR1:MAIT TCR axis has not been studied in detail.
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Affiliation(s)
- Caroline L. Ashley
- Infection, Immunity and Inflammation, School of Medical Sciences, Faculty of Medicine and Health, and the Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
| | - Brian P. McSharry
- Infection, Immunity and Inflammation, School of Medical Sciences, Faculty of Medicine and Health, and the Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
- School of Dentistry and Medical Sciences, Faculty of Science and Health, Charles Sturt University, Wagga Wagga, NSW, Australia
| | - Hamish E. G. McWilliam
- Department of Microbiology and Immunology, The Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia
- Department of Biochemistry and Pharmacology, Institute of Molecular Science and Biotechnology (Bio21), The University of Melbourne, Melbourne, VIC, Australia
| | - Richard J. Stanton
- Division of Infection & Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Ceri A. Fielding
- Division of Infection & Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Rommel A. Mathias
- Infection and Immunity Program, Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - David P. Fairlie
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, The Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia
| | - Jose A. Villadangos
- Department of Microbiology and Immunology, The Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia
- Department of Biochemistry and Pharmacology, Institute of Molecular Science and Biotechnology (Bio21), The University of Melbourne, Melbourne, VIC, Australia
| | - Jamie Rossjohn
- Division of Infection & Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - Allison Abendroth
- Infection, Immunity and Inflammation, School of Medical Sciences, Faculty of Medicine and Health, and the Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
| | - Barry Slobedman
- Infection, Immunity and Inflammation, School of Medical Sciences, Faculty of Medicine and Health, and the Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
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Wang EC, Fielding CA, Stanton RJ. Concerns over functional experiments, interpretation, and required controls. J Clin Invest 2022; 132:e157369. [PMID: 35229732 PMCID: PMC8884895 DOI: 10.1172/jci157369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Elasifer H, Wang EC, Prod’homme V, Davies J, Forbes S, Stanton RJ, Patel M, Fielding CA, Roberts D, Traherne JA, Gruber N, Bugert JJ, Aicheler RJ, Wilkinson GWG. Downregulation of HLA-I by the molluscum contagiosum virus mc080 impacts NK-cell recognition and promotes CD8 + T-cell evasion. J Gen Virol 2020; 101:863-872. [PMID: 32510303 PMCID: PMC7641395 DOI: 10.1099/jgv.0.001417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 03/26/2020] [Indexed: 11/18/2022] Open
Abstract
Molluscum contagiosum virus (MCV) is a common cause of benign skin lesions in young children and currently the only endemic human poxvirus. Following the infection of primary keratinocytes in the epidermis, MCV induces the proliferation of infected cells and this results in the production of wart-like growths. Full productive infection is observed only after the infected cells differentiate. During this prolonged replication cycle the virus must avoid elimination by the host immune system. We therefore sought to investigate the function of the two major histocompatibility complex class-I-related genes encoded by the MCV genes mc033 and mc080. Following insertion into a replication-deficient adenovirus vector, codon-optimized versions of mc033 and mc080 were expressed as endoglycosidase-sensitive glycoproteins that localized primarily in the endoplasmic reticulum. MC080, but not MC033, downregulated cell-surface expression of endogenous classical human leucocyte antigen (HLA) class I and non-classical HLA-E by a transporter associated with antigen processing (TAP)-independent mechanism. MC080 exhibited a capacity to inhibit or activate NK cells in autologous assays in a donor-specific manner. MC080 consistently inhibited antigen-specific T cells being activated by peptide-pulsed targets. We therefore propose that MC080 acts to promote evasion of HLA-I-restricted cytotoxic T cells.
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Affiliation(s)
- Hana Elasifer
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Eddie C.Y. Wang
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Virginie Prod’homme
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
- Present address: Centre Méditerranéen de Médecine Moléculaire, University of Nice Sophia, Antipolis, France
| | - James Davies
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Simone Forbes
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Richard J. Stanton
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Mihil Patel
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Ceri A. Fielding
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - Dawn Roberts
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
| | - James A. Traherne
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK
| | - Nicole Gruber
- DKMS Life Science Lab, St. Petersburger Str. 2, 01069 Dresden, Germany
| | - Joachim J. Bugert
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
- Present address: Institut für Mikrobiologie der Bundeswehr, München, Germany
| | - Rebecca J. Aicheler
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
| | - Gavin W. G. Wilkinson
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XW, UK
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9
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Armstrong RA, Wilson C, Elliott L, Fielding CA, Rogers CA, Caskey FJ, Hinchliffe RJ, Mouton R, Rooshenas L. Regional anaesthesia practice for arteriovenous fistula formation surgery. Anaesthesia 2020; 75:626-633. [PMID: 32030735 PMCID: PMC7187449 DOI: 10.1111/anae.14983] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2019] [Indexed: 01/01/2023]
Abstract
We conducted a survey and semi‐structured qualitative interviews to investigate current anaesthetic practice for arteriovenous fistula formation surgery in the UK. Responses were received from 39 out of 59 vascular centres where arteriovenous access surgery is performed, a response rate of 66%. Thirty‐five centres reported routine use of brachial plexus blocks, but variation in anaesthetic skill‐mix and practice were observed. Interviews were conducted with 19 clinicians from 10 NHS Trusts including anaesthetists, vascular access and renal nurses, surgeons and nephrologists. Thematic analysis identified five key findings: (1) current anaesthetic practice showed that centres could be classified as ‘regional anaesthesia dominant’ or ‘local anaesthesia/mixed’; (2) decision making around mode of anaesthesia highlighted the key role of surgeons as frontline decision makers across both centre types; (3) perceived barriers and facilitators of regional block use included clinicians’ beliefs and preferences, resource considerations and patients’ treatment preferences; (4) anaesthetists’ preference for supraclavicular blocks emerged, alongside acknowledgement of varied practice; (5) there was widespread support for a future randomised controlled trial, although clinician equipoise issues and logistical/resource‐related concerns were viewed as potential challenges. The use of regional anaesthesia for arteriovenous fistula formation in the UK is varied and influenced by a multitude of factors. Despite the availability of anaesthetists capable of performing regional blocks, there are other limiting factors that influence the routine use of this technique. The study also highlighted the perceived need for a large multicentre, randomised controlled trial to provide an evidence base to inform current practice.
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Affiliation(s)
| | - C Wilson
- Population Health Sciences, University of Bristol, Bristol, UK
| | - L Elliott
- Bristol Centre for Surgical Research, University of Bristol, Bristol, UK
| | - C A Fielding
- Trainee Advanced Clinical Practitioner, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
| | - C A Rogers
- Translational Health Sciences, University of Bristol, Bristol, UK
| | - F J Caskey
- Population Health Sciences, University of Bristol, Bristol, UK
| | - R J Hinchliffe
- Bristol Centre for Surgical Research, University of Bristol, Bristol, UK
| | - R Mouton
- Department of Anaesthesia, North Bristol NHS Trust, Bristol, UK
| | - L Rooshenas
- Population Health Sciences, University of Bristol, Bristol, UK
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10
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Patel M, Vlahava VM, Forbes SK, Fielding CA, Stanton RJ, Wang ECY. HCMV-Encoded NK Modulators: Lessons From in vitro and in vivo Genetic Variation. Front Immunol 2018; 9:2214. [PMID: 30327650 PMCID: PMC6174198 DOI: 10.3389/fimmu.2018.02214] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 09/06/2018] [Indexed: 12/22/2022] Open
Abstract
Human cytomegalovirus (HCMV) is under constant selective pressure from the immune system in vivo. Study of HCMV genes that have been lost in the absence of, or genetically altered by, such selection can focus research toward findings of in vivo significance. We have been particularly interested in the most pronounced change in the highly passaged laboratory strains AD169 and Towne—the deletion of 13–15 kb of sequence (designated the UL/b′ region) that encodes up to 22 canonical genes, UL133-UL150. At least 5 genes have been identified in UL/b′ that inhibit NK cell function. UL135 suppresses formation of the immunological synapse (IS) by remodeling the actin cytoskeleton, thereby illustrating target cell cooperation in IS formation. UL141 inhibits expression of two activating ligands (CD155, CD112) for the activating receptor CD226 (DNAM-1), and two receptors (TRAIL-R1, R2) for the apoptosis-inducing TRAIL. UL142, ectopically expressed in isolation, and UL148A, target specific MICA allotypes that are ligands for NKG2D. UL148 impairs expression of CD58 (LFA-3), the co-stimulatory cell adhesion molecule for CD2 found on T and NK cells. Outside UL/b′, studies on natural variants have shown UL18 mutants change affinity for their inhibitory ligand LIR-1, while mutations in UL40's HLA-E binding peptide differentially drive NKG2C+ NK expansions. Research into HCMV genomic stability and its effect on NK function has provided important insights into virus:host interactions, but future studies will require consideration of genetic variability and the effect of genes expressed in the context of infection to fully understand their in vivo impact.
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Affiliation(s)
- Mihil Patel
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Virginia-Maria Vlahava
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Simone K Forbes
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Ceri A Fielding
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Richard J Stanton
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Eddie C Y Wang
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
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11
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Nightingale K, Lin KM, Ravenhill BJ, Davies C, Nobre L, Fielding CA, Ruckova E, Fletcher-Etherington A, Soday L, Nichols H, Sugrue D, Wang ECY, Moreno P, Umrania Y, Huttlin EL, Antrobus R, Davison AJ, Wilkinson GWG, Stanton RJ, Tomasec P, Weekes MP. High-Definition Analysis of Host Protein Stability during Human Cytomegalovirus Infection Reveals Antiviral Factors and Viral Evasion Mechanisms. Cell Host Microbe 2018; 24:447-460.e11. [PMID: 30122656 PMCID: PMC6146656 DOI: 10.1016/j.chom.2018.07.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 06/01/2018] [Accepted: 06/25/2018] [Indexed: 12/03/2022]
Abstract
Human cytomegalovirus (HCMV) is an important pathogen with multiple immune evasion strategies, including virally facilitated degradation of host antiviral restriction factors. Here, we describe a multiplexed approach to discover proteins with innate immune function on the basis of active degradation by the proteasome or lysosome during early-phase HCMV infection. Using three orthogonal proteomic/transcriptomic screens to quantify protein degradation, with high confidence we identified 35 proteins enriched in antiviral restriction factors. A final screen employed a comprehensive panel of viral mutants to predict viral genes that target >250 human proteins. This approach revealed that helicase-like transcription factor (HLTF), a DNA helicase important in DNA repair, potently inhibits early viral gene expression but is rapidly degraded during infection. The functionally unknown HCMV protein UL145 facilitates HLTF degradation by recruiting the Cullin4 E3 ligase complex. Our approach and data will enable further identifications of innate pathways targeted by HCMV and other viruses. Multiplexed viral screens uncover host proteins targeted by early HCMV infection Finding host proteins targeted for degradation by HCMV reveals immune evasion strategies A screen of HCMV deletion mutants discovers viral factors that target >250 host proteins HLTF is an antiviral restriction factor that is targeted for degradation by HCMV UL145
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Affiliation(s)
- Katie Nightingale
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Kai-Min Lin
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Benjamin J Ravenhill
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Colin Davies
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Luis Nobre
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Ceri A Fielding
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Eva Ruckova
- Regional Centre for Applied Molecular Oncology (RECAMO), Masaryk Memorial Cancer Institute, Zluty Kopec 7, 65653 Brno, Czech Republic
| | | | - Lior Soday
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Hester Nichols
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Daniel Sugrue
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Eddie C Y Wang
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Pablo Moreno
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Yagnesh Umrania
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Edward L Huttlin
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA
| | - Robin Antrobus
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Andrew J Davison
- MRC-University of Glasgow Centre for Virus Research, Sir Michael Stoker Building, 464 Bearsden Road, Glasgow G61 1QH, UK
| | - Gavin W G Wilkinson
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Richard J Stanton
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Peter Tomasec
- Cardiff University School of Medicine, Division of Infection and Immunity, Henry Wellcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - Michael P Weekes
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK.
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12
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Stacey MA, Clare S, Clement M, Marsden M, Abdul-Karim J, Kane L, Harcourt K, Brandt C, Fielding CA, Smith SE, Wash RS, Brias SG, Stack G, Notley G, Cambridge EL, Isherwood C, Speak AO, Johnson Z, Ferlin W, Jones SA, Kellam P, Humphreys IR. The antiviral restriction factor IFN-induced transmembrane protein 3 prevents cytokine-driven CMV pathogenesis. J Clin Invest 2017; 127:1463-1474. [PMID: 28240600 PMCID: PMC5373880 DOI: 10.1172/jci84889] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 01/05/2017] [Indexed: 12/20/2022] Open
Abstract
The antiviral restriction factor IFN-induced transmembrane protein 3 (IFITM3) inhibits cell entry of a number of viruses, and genetic diversity within IFITM3 determines susceptibility to viral disease in humans. Here, we used the murine CMV (MCMV) model of infection to determine that IFITM3 limits herpesvirus-associated pathogenesis without directly preventing virus replication. Instead, IFITM3 promoted antiviral cellular immunity through the restriction of virus-induced lymphopenia, apoptosis-independent NK cell death, and loss of T cells. Viral disease in Ifitm3-/- mice was accompanied by elevated production of cytokines, most notably IL-6. IFITM3 inhibited IL-6 production by myeloid cells in response to replicating and nonreplicating virus as well as following stimulation with the TLR ligands Poly(I:C) and CpG. Although IL-6 promoted virus-specific T cell responses, uncontrolled IL-6 expression in Ifitm3-/- mice triggered the loss of NK cells and subsequently impaired control of MCMV replication. Thus, IFITM3 represents a checkpoint regulator of antiviral immunity that controls cytokine production to restrict viral pathogenesis. These data suggest the utility of cytokine-targeting strategies in the treatment of virus-infected individuals with impaired IFITM3 activity.
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Affiliation(s)
- Maria A. Stacey
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Simon Clare
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Mathew Clement
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Morgan Marsden
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Juneid Abdul-Karim
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Leanne Kane
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Katherine Harcourt
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Cordelia Brandt
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Ceri A. Fielding
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Sarah E. Smith
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Rachael S. Wash
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Silvia Gimeno Brias
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Gabrielle Stack
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - George Notley
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Emma L. Cambridge
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | - Anneliese O. Speak
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | | | - Simon A. Jones
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
| | - Paul Kellam
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Ian R. Humphreys
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
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13
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Fielding CA, Weekes MP, Nobre LV, Ruckova E, Wilkie GS, Paulo JA, Chang C, Suárez NM, Davies JA, Antrobus R, Stanton RJ, Aicheler RJ, Nichols H, Vojtesek B, Trowsdale J, Davison AJ, Gygi SP, Tomasec P, Lehner PJ, Wilkinson GWG. Control of immune ligands by members of a cytomegalovirus gene expansion suppresses natural killer cell activation. eLife 2017; 6:e22206. [PMID: 28186488 PMCID: PMC5367895 DOI: 10.7554/elife.22206] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 02/09/2017] [Indexed: 01/31/2023] Open
Abstract
The human cytomegalovirus (HCMV) US12 family consists of ten sequentially arranged genes (US12-21) with poorly characterized function. We now identify novel natural killer (NK) cell evasion functions for four members: US12, US14, US18 and US20. Using a systematic multiplexed proteomics approach to quantify ~1300 cell surface and ~7200 whole cell proteins, we demonstrate that the US12 family selectively targets plasma membrane proteins and plays key roles in regulating NK ligands, adhesion molecules and cytokine receptors. US18 and US20 work in concert to suppress cell surface expression of the critical NKp30 ligand B7-H6 thus inhibiting NK cell activation. The US12 family is therefore identified as a major new hub of immune regulation.
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Affiliation(s)
- Ceri A Fielding
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Michael P Weekes
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Luis V Nobre
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Eva Ruckova
- Regional Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Gavin S Wilkie
- MRC-University of Glasgow Centre for Virus Research, University of Glasgow, Glasgow, United Kingdom
| | - Joao A Paulo
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Chiwen Chang
- Immunology Division, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Nicolás M Suárez
- MRC-University of Glasgow Centre for Virus Research, University of Glasgow, Glasgow, United Kingdom
| | - James A Davies
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Robin Antrobus
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Richard J Stanton
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Rebecca J Aicheler
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Hester Nichols
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Borek Vojtesek
- Regional Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - John Trowsdale
- Immunology Division, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Andrew J Davison
- MRC-University of Glasgow Centre for Virus Research, University of Glasgow, Glasgow, United Kingdom
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, United States
| | - Peter Tomasec
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Paul J Lehner
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Gavin W G Wilkinson
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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14
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Catar R, Witowski J, Zhu N, Lücht C, Derrac Soria A, Uceda Fernandez J, Chen L, Jones SA, Fielding CA, Rudolf A, Topley N, Dragun D, Jörres A. IL-6 Trans-Signaling Links Inflammation with Angiogenesis in the Peritoneal Membrane. J Am Soc Nephrol 2016; 28:1188-1199. [PMID: 27837150 DOI: 10.1681/asn.2015101169] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 09/19/2016] [Indexed: 12/31/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) is implicated in the peritoneal membrane remodeling that limits ultrafiltration in patients on peritoneal dialysis (PD). Although the exact mechanism of VEGF induction in PD is unclear, VEGF concentrations in drained dialysate correlate with IL-6 levels, suggesting a link between these cytokines. Human peritoneal mesothelial cells (HPMCs), the main source of IL-6 and VEGF in the peritoneum, do not bear the cognate IL-6 receptor and are thus unable to respond to classic IL-6 receptor signaling. Here, we investigated whether VEGF release by HPMCs is controlled by IL-6 in combination with its soluble receptor (IL-6 trans-signaling). Although treatment with either IL-6 or soluble IL-6 receptor (sIL-6R) alone had no effect on VEGF production, stimulation of HPMCs with IL-6 in combination with sIL-6R promoted VEGF expression and secretion through a transcriptional mechanism involving STAT3 and SP4. Conditioned medium from HPMCs cultured with IL-6 and sIL-6R promoted angiogenic endothelial tube formation, which could be blocked by silencing SP4. In vivo, induction of peritoneal inflammation in wild-type and IL-6-deficient mice showed IL-6 involvement in the control of Sp4 and Vegf expression and new vessel formation, confirming the role of IL-6 trans-signaling in these processes. Taken together, these findings identify a novel mechanism linking IL-6 trans-signaling and angiogenesis in the peritoneal membrane.
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Affiliation(s)
- Rusan Catar
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Janusz Witowski
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Department of Pathophysiology, Poznan University of Medical Sciences, Poznan, Poland
| | - Nan Zhu
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Lücht
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | | | - Lei Chen
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | | | - Andras Rudolf
- Department of Pathophysiology, Poznan University of Medical Sciences, Poznan, Poland
| | - Nicholas Topley
- Division of Infection and Immunity and.,Wales Kidney Research Unit, Cardiff University School of Medicine, Cardiff, United Kingdom; and
| | - Duska Dragun
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Achim Jörres
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany; .,Department of Medicine I, Nephrology, Transplantation and Medical Intensive Care, University Witten/Herdecke, Medical Center Cologne-Merheim, Cologne, Germany
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15
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Murrell I, Wilkie GS, Davison AJ, Statkute E, Fielding CA, Tomasec P, Wilkinson GWG, Stanton RJ. Genetic Stability of Bacterial Artificial Chromosome-Derived Human Cytomegalovirus during Culture In Vitro. J Virol 2016; 90:3929-43. [PMID: 26842472 PMCID: PMC4810542 DOI: 10.1128/jvi.02858-15] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 01/21/2016] [Indexed: 02/02/2023] Open
Abstract
UNLABELLED Clinical human cytomegalovirus (HCMV) strains invariably mutate when propagatedin vitro Mutations in gene RL13 are selected in all cell types, whereas in fibroblasts mutants in the UL128 locus (UL128L; genes UL128, UL130, and UL131A) are also selected. In addition, sporadic mutations are selected elsewhere in the genome in all cell types. We sought to investigate conditions under which HCMV can be propagated without incurring genetic defects. Bacterial artificial chromosomes (BACs) provide a stable, genetically defined source of viral genome. Viruses were generated from BACs containing the genomes of strains TR, TB40, FIX, and Merlin, as well as from Merlin-BAC recombinants containing variant nucleotides in UL128L from TB40-BAC4 or FIX-BAC. Propagation of viruses derived from TR-BAC, TB40-BAC4, and FIX-BAC in either fibroblast or epithelial cells was associated with the generation of defects around the prokaryotic vector, which is retained in the unique short (US) region of viruses. This was not observed for Merlin-BAC, from which the vector is excised in derived viruses; however, propagation in epithelial cells was consistently associated with mutations in the unique longb' (UL/b') region, all impacting on gene UL141. Viruses derived from Merlin-BAC in fibroblasts had mutations in UL128L, but mutations occurred less frequently with recombinants containing UL128L nucleotides from TB40-BAC4 or FIX-BAC. Viruses derived from a Merlin-BAC derivative in which RL13 and UL128L were either mutated or repressed were remarkably stable in fibroblasts. Thus, HCMV containing a wild-type gene complement can be generatedin vitroby deriving virus from a self-excising BAC in fibroblasts and repressing RL13 and UL128L. IMPORTANCE Researchers should aim to study viruses that accurately represent the causative agents of disease. This is problematic for HCMV because clinical strains mutate rapidly when propagatedin vitro, becoming less cell associated, altered in tropism, more susceptible to natural killer cells, and less pathogenic. Following isolation from clinical material, HCMV genomes can be stabilized by cloning into bacterial artificial chromosomes (BACs), and then virus is regenerated by DNA transfection. However, mutations can occur not only during isolation prior to BAC cloning but also when virus is regenerated. We have identified conditions under which BAC-derived viruses containing an intact, wild-type genome can be propagatedin vitrowith minimal risk of mutants being selected, enabling studies of viruses expressing the gene complement of a clinical strain. However, even under these optimized conditions, sporadic mutations can occur, highlighting the advisability of sequencing the HCMV stocks used in experiments.
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Affiliation(s)
- Isa Murrell
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Gavin S Wilkie
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Andrew J Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Evelina Statkute
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Ceri A Fielding
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Peter Tomasec
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Gavin W G Wilkinson
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Richard J Stanton
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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16
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Stacey MA, Clare S, Marsden M, Clement M, Fielding CA, Johnson Z, Ferlin W, Jones SA, Kellam P, Humphreys IR. ID: 170. Cytokine 2015. [DOI: 10.1016/j.cyto.2015.08.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Abstract
ABSTRACT Viruses have evolved to subvert host cell pathways to enable their replication and persistence. In particular, virus-encoded gene products target the host's immune system to evade elimination by antiviral immune defenses. Cytokines are soluble, secreted proteins, which regulate many aspects of immune responses, by providing signals through cell surface receptors on target cells. Cytokine pathways are therefore attractive targets for modulation by viruses during their replication cycle. This review deals with modulation of cytokine pathways by the human herpesvirus, a family of viruses that are capable of life-long persistence in the host and cause severe disease particularly in immunocompromised individuals.
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18
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Weekes MP, Tomasec P, Huttlin EL, Fielding CA, Nusinow D, Stanton RJ, Wang ECY, Aicheler R, Murrell I, Wilkinson GWG, Lehner PJ, Gygi SP. Quantitative temporal viromics: an approach to investigate host-pathogen interaction. Cell 2014; 157:1460-1472. [PMID: 24906157 PMCID: PMC4048463 DOI: 10.1016/j.cell.2014.04.028] [Citation(s) in RCA: 316] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 02/18/2014] [Accepted: 04/03/2014] [Indexed: 12/11/2022]
Abstract
A systematic quantitative analysis of temporal changes in host and viral proteins throughout the course of a productive infection could provide dynamic insights into virus-host interaction. We developed a proteomic technique called “quantitative temporal viromics” (QTV), which employs multiplexed tandem-mass-tag-based mass spectrometry. Human cytomegalovirus (HCMV) is not only an important pathogen but a paradigm of viral immune evasion. QTV detailed how HCMV orchestrates the expression of >8,000 cellular proteins, including 1,200 cell-surface proteins to manipulate signaling pathways and counterintrinsic, innate, and adaptive immune defenses. QTV predicted natural killer and T cell ligands, as well as 29 viral proteins present at the cell surface, potential therapeutic targets. Temporal profiles of >80% of HCMV canonical genes and 14 noncanonical HCMV open reading frames were defined. QTV is a powerful method that can yield important insights into viral infection and is applicable to any virus with a robust in vitro model. PaperClip
>8,000 proteins quantified over eight time points, including 1,200 cell-surface proteins Temporal profiles of 139/171 canonical HCMV proteins and 14 noncanonical HCMV ORFs Multiple families of cell-surface receptors selectively modulated by HCMV Multiple signaling pathways modulated during HCMV infection
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Affiliation(s)
- Michael P Weekes
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA; Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK.
| | - Peter Tomasec
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Edward L Huttlin
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA
| | - Ceri A Fielding
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - David Nusinow
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA
| | - Richard J Stanton
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Eddie C Y Wang
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Rebecca Aicheler
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Isa Murrell
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Gavin W G Wilkinson
- School of Medicine, Cardiff University, Tenovus Building, Heath Park, Cardiff CF14 4XX, UK
| | - Paul J Lehner
- Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.
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Fielding CA, Aicheler R, Stanton RJ, Wang ECY, Han S, Seirafian S, Davies J, McSharry BP, Weekes MP, Antrobus PR, Prod'homme V, Blanchet FP, Sugrue D, Cuff S, Roberts D, Davison AJ, Lehner PJ, Wilkinson GWG, Tomasec P. Two novel human cytomegalovirus NK cell evasion functions target MICA for lysosomal degradation. PLoS Pathog 2014; 10:e1004058. [PMID: 24787765 PMCID: PMC4006889 DOI: 10.1371/journal.ppat.1004058] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 02/18/2014] [Indexed: 02/07/2023] Open
Abstract
NKG2D plays a major role in controlling immune responses through the regulation of natural killer (NK) cells, αβ and γδ T-cell function. This activating receptor recognizes eight distinct ligands (the MHC Class I polypeptide-related sequences (MIC) A andB, and UL16-binding proteins (ULBP)1-6) induced by cellular stress to promote recognition cells perturbed by malignant transformation or microbial infection. Studies into human cytomegalovirus (HCMV) have aided both the identification and characterization of NKG2D ligands (NKG2DLs). HCMV immediate early (IE) gene up regulates NKGDLs, and we now describe the differential activation of ULBP2 and MICA/B by IE1 and IE2 respectively. Despite activation by IE functions, HCMV effectively suppressed cell surface expression of NKGDLs through both the early and late phases of infection. The immune evasion functions UL16, UL142, and microRNA(miR)-UL112 are known to target NKG2DLs. While infection with a UL16 deletion mutant caused the expected increase in MICB and ULBP2 cell surface expression, deletion of UL142 did not have a similar impact on its target, MICA. We therefore performed a systematic screen of the viral genome to search of addition functions that targeted MICA. US18 and US20 were identified as novel NK cell evasion functions capable of acting independently to promote MICA degradation by lysosomal degradation. The most dramatic effect on MICA expression was achieved when US18 and US20 acted in concert. US18 and US20 are the first members of the US12 gene family to have been assigned a function. The US12 family has 10 members encoded sequentially through US12-US21; a genetic arrangement, which is suggestive of an 'accordion' expansion of an ancestral gene in response to a selective pressure. This expansion must have be an ancient event as the whole family is conserved across simian cytomegaloviruses from old world monkeys. The evolutionary benefit bestowed by the combinatorial effect of US18 and US20 on MICA may have contributed to sustaining the US12 gene family.
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Affiliation(s)
- Ceri A. Fielding
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Rebecca Aicheler
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Richard J. Stanton
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Eddie C. Y. Wang
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Song Han
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Sepehr Seirafian
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - James Davies
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Brian P. McSharry
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Michael P. Weekes
- Cambridge Institute for Medical Research (CIMR), Wellcome Trust/MRC Building, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - P. Robin Antrobus
- Cambridge Institute for Medical Research (CIMR), Wellcome Trust/MRC Building, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Virginie Prod'homme
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Fabien P. Blanchet
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Daniel Sugrue
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Simone Cuff
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Dawn Roberts
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Andrew J. Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Paul J. Lehner
- Cambridge Institute for Medical Research (CIMR), Wellcome Trust/MRC Building, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Gavin W. G. Wilkinson
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
- * E-mail:
| | - Peter Tomasec
- Section of Medical Microbiology, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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Colmont CS, Raby AC, Dioszeghy V, Lebouder E, Foster TL, Jones SA, Labéta MO, Fielding CA, Topley N. Human peritoneal mesothelial cells respond to bacterial ligands through a specific subset of Toll-like receptors. Nephrol Dial Transplant 2011; 26:4079-90. [PMID: 21633096 PMCID: PMC3224115 DOI: 10.1093/ndt/gfr217] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Bacterial infection remains a major cause of morbidity and mortality in peritoneal dialysis (PD) patients worldwide. Previous studies have identified a key role for mesothelial cells, lining the peritoneal cavity, in coordinating inflammation and host defense. Toll-like receptor (TLR) involvement in early activation events within the mesothelium, however, remains poorly defined. To investigate the initiation of bacterial peritonitis, we characterized TLR activation by bacterial ligands in human peritoneal mesothelial cells (HPMC). METHODS Primary HPMC were isolated from omental biopsies and TLR expression detected by real-time polymerase chain reaction (PCR), reverse transcription (RT)-PCR and flow cytometry. The responsiveness of HPMC to specific bacterial TLR agonists was determined using chemokine production as a biological readout. The requirement for CD14 in HPMC responses to a clinically relevant Staphylococcus epidermidis cell-free supernatant (SES) was investigated using soluble CD14 or anti-CD14-blocking antibodies. RESULTS Real-time PCR detected TLR1-6 messenger RNA expression in HPMC and responses to TLR2/1 and TLR2/6 ligands and SES. No cell surface TLR4 expression or responses to lipopolysaccharide were detectable in HPMC, but they did respond to flagellin, a TLR5 ligand. SES-mediated responses were dependent on TLR2 but did not require CD14 in HPMC for optimal efficiency, unlike peripheral blood mononuclear cells. HPMC expression of TLR2 was also modulated by TLR2 ligands and inflammatory cytokines. CONCLUSIONS These data suggest that mesothelial cell activation by TLR2/1, TLR2/6 and TLR5 contributes to bacterial recognition influencing the course of the infective process and has implications for improving treatment of infection in PD patients.
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Affiliation(s)
- Chantal S Colmont
- Department of Infection, Immunity and Biochemistry, School of Medicine, Cardiff University, Cardiff, UK
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Stumhofer JS, Tait ED, Quinn WJ, Hosken N, Spudy B, Goenka R, Fielding CA, O'Hara AC, Chen Y, Jones ML, Saris CJM, Rose-John S, Cua DJ, Jones SA, Elloso MM, Grötzinger J, Cancro MP, Levin SD, Hunter CA. A role for IL-27p28 as an antagonist of gp130-mediated signaling. Nat Immunol 2010; 11:1119-26. [PMID: 21057510 PMCID: PMC3059498 DOI: 10.1038/ni.1957] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 10/12/2010] [Indexed: 12/11/2022]
Abstract
The heterodimeric cytokine interleukin 27 (IL-27) signals through the IL-27Rα subunit of its receptor, combined with gp130, a common receptor chain used by several cytokines, including IL-6. Notably, the IL-27 subunits p28 (IL-27p28) and EBI3 are not always expressed together, which suggests that they may have unique functions. Here we show that IL-27p28, independently of EBI3, antagonized cytokine signaling through gp130 and IL-6-mediated production of IL-17 and IL-10. Similarly, the ability to generate antibody responses was dependent on the activity of gp130-signaling cytokines. Mice transgenic for expression of IL-27p28 showed a substantial defect in the formation of germinal centers and antibody production. Thus, IL-27p28, as a natural antagonist of gp130-mediated signaling, may be useful as a therapeutic for managing inflammation mediated by cytokines that signal through gp130.
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Affiliation(s)
- Jason S Stumhofer
- University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, USA
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Coles B, Colmont C, Fielding CA, Kift-Morgan A, Hams E, Topley N, Jones SA. SS11-4 Local manipulation of IL-6 trans-signaling therapeutically enhances anti-microbial host defense. Cytokine 2010. [DOI: 10.1016/j.cyto.2010.07.335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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24
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Li N, McLaren JE, Michael DR, Clement M, Fielding CA, Ramji DP. ERK is integral to the IFN-γ-mediated activation of STAT1, the expression of key genes implicated in atherosclerosis, and the uptake of modified lipoproteins by human macrophages. J Immunol 2010; 185:3041-8. [PMID: 20675591 DOI: 10.4049/jimmunol.1000993] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The proinflammatory cytokine IFN-gamma is a master regulator of atherosclerosis and mediates its cellular actions mainly through STAT1. Unfortunately, the impact of other IFN-gamma inducible pathways on STAT1 activation and the regulation of downstream responses associated with atherosclerosis in human macrophages are poorly understood and were therefore investigated. In this study, we demonstrate that the IFN-gamma-mediated phosphorylation of STAT1 on Ser(727), crucial for its maximal activity, was attenuated in human macrophages by pharmacological inhibition of ERK. In these cells, IFN-gamma induced changes in the expression of several key genes implicated in atherosclerosis, such as MCP-1, through an ERK-dependent mechanism. Additionally, the IFN-gamma-induced activity of STAT1-responsive promoters was attenuated by transfection of dominant-negative forms of ERK and other key components of this pathway. Furthermore, the IFN-gamma-induced uptake of acetylated and oxidized low-density lipoprotein by human macrophages was attenuated by pharmacological inhibition or RNA interference-mediated knockdown of ERK. These studies suggest a critical role for ERK signaling in the IFN-gamma-mediated changes in macrophage cholesterol homeostasis and gene expression during atherosclerosis.
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Affiliation(s)
- Na Li
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
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Affiliation(s)
- Ceri A. Fielding
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University Cardiff, United Kingdom
| | - Nicholas Topley
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University Cardiff, United Kingdom
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Fielding CA, Topley N. Piece by piece: solving the puzzle of peritoneal fibrosis. Perit Dial Int 2008; 28:477-479. [PMID: 18708539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Affiliation(s)
- Ceri A Fielding
- Department of Medical Biochemistry and Immunology School of Medicine, Cardiff University Cardiff, United Kingdom.
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Rabe B, Chalaris A, Adam N, Paliga K, Lange H, Laskay T, Fielding CA, Waetzig GH, Seegert D, Williams AS, Jones SA, Sina C, Rose-John S, Scheller J. 32 The role of IL6-transsignaling in acute and chronic inflammation. Cytokine 2008. [DOI: 10.1016/j.cyto.2008.07.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Fielding CA, McLoughlin RM, McLeod L, Colmont CS, Najdovska M, Grail D, Ernst M, Jones SA, Topley N, Jenkins BJ. IL-6 regulates neutrophil trafficking during acute inflammation via STAT3. J Immunol 2008; 181:2189-95. [PMID: 18641358 DOI: 10.4049/jimmunol.181.3.2189] [Citation(s) in RCA: 279] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The successful resolution of inflammation is dependent upon the coordinated transition from the initial recruitment of neutrophils to a more sustained population of mononuclear cells. IL-6, which signals via the common receptor subunit gp130, represents a crucial checkpoint regulator of neutrophil trafficking during the inflammatory response by orchestrating chemokine production and leukocyte apoptosis. However, the relative contribution of specific IL-6-dependent signaling pathways to these processes remains unresolved. To define the receptor-mediated signaling events responsible for IL-6-driven neutrophil trafficking, we used a series of gp130 knockin mutant mice displaying altered IL-6-signaling capacities in an experimental model of acute peritoneal inflammation. Hyperactivation of STAT1 and STAT3 in gp130(Y757F/Y757F) mice led to a more rapid clearance of neutrophils, and this coincided with a pronounced down-modulation in production of the neutrophil-attracting chemokine CXCL1/KC. By contrast, the proportion of apoptotic neutrophils in the inflammatory infiltrate remained unaffected. In gp130(Y757F/Y757F) mice lacking IL-6, neutrophil trafficking and CXCL1/KC levels were normal, and this corresponded with a reduction in the level of STAT1/3 activity. Furthermore, monoallelic ablation of Stat3 in gp130(Y757F/Y757F) mice specifically reduced STAT3 activity and corrected both the rapid clearance of neutrophils and impaired CXCL1/KC production. Conversely, genetic deletion of Stat1 in gp130(Y757F/Y757F) mice failed to rescue the altered responses observed in gp130(Y757F/Y757F) mice. Collectively, these data genetically define that IL-6-driven signaling via STAT3, but not STAT1, limits the inflammatory recruitment of neutrophils, and therefore represents a critical event for the termination of the innate immune response.
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Affiliation(s)
- Ceri A Fielding
- Department of Nephrology, School of Medicine, Cardiff University, Cardiff, United Kingdom
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Hams E, Colmont CS, Dioszeghy V, Hammond VJ, Fielding CA, Williams AS, Tanaka M, Miyajima A, Taylor PR, Topley N, Jones SA. Oncostatin M receptor-beta signaling limits monocytic cell recruitment in acute inflammation. J Immunol 2008; 181:2174-80. [PMID: 18641356 DOI: 10.4049/jimmunol.181.3.2174] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although the IL-6-related cytokine oncostatin M (OSM) affects processes associated with disease progression, the specific function of OSM in the face of an inflammatory challenge remains unclear. In this report, a peritoneal model of acute inflammation was used to define the influence of OSM on chemokine-mediated leukocyte recruitment. When compared with wild-type and IL-6-deficient mice, peritoneal inflammation in oncostatin M receptor-beta-deficient (OSMR-KO) mice resulted in enhanced monocytic cell trafficking. In contrast to IL-6-deficient mice, OSMR-KO mice displayed no difference in neutrophil and lymphocyte migration. Subsequent in vitro studies using human peritoneal mesothelial cells and an in vivo appraisal of inflammatory chemokine expression after peritoneal inflammation identified OSM as a prominent regulator of CCL5 expression. Specifically, OSM inhibited IL-1beta-mediated NF-kappaB activity and CCL5 expression in human mesothelial cells. This was substantiated in vivo where peritoneal inflammation in OSMR-KO mice resulted in a temporal increase in both CCL5 secretion and NF-kappaB activation. These findings suggest that IL-6 and OSM individually affect the profile of leukocyte trafficking, and they point to a hitherto unidentified interplay between OSM signaling and the inflammatory activation of NF-kappaB.
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Affiliation(s)
- Emily Hams
- Department of Medical Biochemistry and Immunology, Cardiff University, Cardiff, United Kingdom
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30
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Coles B, Fielding CA, Rose-John S, Scheller J, Jones SA, O'Donnell VB. Classic interleukin-6 receptor signaling and interleukin-6 trans-signaling differentially control angiotensin II-dependent hypertension, cardiac signal transducer and activator of transcription-3 activation, and vascular hypertrophy in vivo. Am J Pathol 2007; 171:315-25. [PMID: 17591976 PMCID: PMC1941613 DOI: 10.2353/ajpath.2007.061078] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Interleukin (IL)-6 acts via a receptor complex consisting of the cognate IL-6 receptor (IL-6R) or the soluble IL-6 receptor (sIL-6R) and glycoprotein 130 (gp130). Here, we investigated the role of these IL-6R components in hypertension and vascular hypertrophy in mice. Angiotensin (Ang) II (1.1 mg/kg/day) caused hypertension and cardiac/aortic hypertrophy in wild-type, but not IL-6(-/-), mice throughout 7 days. A recombinant dimeric soluble gp130 (sgp130Fc; 50 to 100 microg, i.p.) blocked Ang II hypertension but not hypertrophy in wild-type mice. Cognate IL-6R was detected in aortic smooth muscle, but its levels and those of plasma sIL-6R were approximately 50% decreased in IL-6(-/-) mice. Ang II infusion activated signal transducer and activator of transcription-3 in heart of WT and decreased Ang II receptor 1 (ATR1) expression in aorta. Both responses were unaffected by sgp130Fc and absent in IL-6(-/-) mice. In summary, we show that IL-6 trans-signaling is required for Ang II-dependent hypertension, but that hypertrophy, down-regulation of AT1R, and cardiac signal transducer and activator of transcription-3 activation are mediated via cognate IL-6R. These data show that IL-6 responses in a single disease context are governed by both modes of IL-6 signaling, with each pathway eliciting different outcomes. Inhibition of IL-6 signaling is suggested as a potential therapy for hypertension and cardiac hypertrophy.
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Affiliation(s)
- Barbara Coles
- Dept of Medical Biochemistry and Immunology, Heath Park, Cardiff, UK
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Rabe B, Chalaris A, May U, Paliga K, Lange H, Laskay T, Fielding CA, Waetzig GH, Seegert D, Williams AS, Jones SA, Rose-John S, Scheller J. 124 IL6/sIL6R-Transsignaling Controls Innate and Aquired Immunity. Cytokine 2007. [DOI: 10.1016/j.cyto.2007.07.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Jenkins BJ, Nadjovska M, Greenhill C, McLeod L, Fielding CA, Jones SA, Topley N, Grail D, Ernst M. 64 Genetic Dissection of the Critical Role IL-6 Family Cytokines Play in Inflammation and Cancer. Cytokine 2007. [DOI: 10.1016/j.cyto.2007.07.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Chalaris A, Rabe B, Paliga K, Lange H, Laskay T, Fielding CA, Jones SA, Rose-John S, Scheller J. Apoptosis is a natural stimulus of IL6R shedding and contributes to the proinflammatory trans-signaling function of neutrophils. Blood 2007; 110:1748-55. [PMID: 17567983 DOI: 10.1182/blood-2007-01-067918] [Citation(s) in RCA: 252] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Interleukin 6 (IL6) trans-signaling has emerged as a prominent regulator of immune responses during both innate and acquired immunity. Regulation of IL6 trans-signaling is reliant upon the release of soluble IL6 receptor (sIL6R), which binds IL6 to create an agonistic IL6/sIL6R complex capable of activating cell types that would not normally respond to IL6 itself. Here we show that intrinsic and extrinsic apoptotic stimulation by DNA damage, cytokine deprivation, and Fas stimulation promotes shedding of sIL6R. Apoptosis-induced shedding of the IL6R was caspase dependent but PKC independent, with inhibition of ADAM17 preventing IL6R shedding. Such insight is relevant to the control of acute inflammation, where transition from the initial neutrophil infiltration to a more sustained population of mononuclear cells is essential for the resolution of the inflammatory process. This transitional event is governed by IL6 trans-signaling. This study demonstrates that IL6R is shed from apoptotic human neutrophils. In vivo studies in a murine inflammation model showed that neutrophil depletion resulted in reduced local sIL6R levels and a concomitant decrease in mononuclear cells, suggesting that apoptosis-induced IL6R shedding from neutrophils promotes IL6 trans-signaling and regulates the attraction of monocytic cells involved in the clearance of apoptotic neutrophils.
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Affiliation(s)
- Athena Chalaris
- Department of Biochemistry, Christian-Albrechts-University, Kiel, Germany
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Nowell MA, Richards PJ, Fielding CA, Ognjanovic S, Topley N, Williams AS, Bryant-Greenwood G, Jones SA. Regulation of pre-B cell colony-enhancing factor by STAT-3-dependent interleukin-6 trans-signaling: implications in the pathogenesis of rheumatoid arthritis. ACTA ACUST UNITED AC 2006; 54:2084-95. [PMID: 16802343 DOI: 10.1002/art.21942] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To determine whether interleukin-6 (IL-6) trans-signaling directs the expression of pre-B cell colony-enhancing factor (PBEF) in vitro and in vivo. METHODS Complementary DNA from rheumatoid arthritis (RA) synovial fibroblasts treated with IL-6 and soluble IL-6 receptor (sIL-6R) was used to probe a cytokine microarray. PBEF regulation by the IL-6-related cytokines, IL-6, sIL-6R, oncostatin M (OSM), IL-11, and leukemia inhibitory factor (LIF) was determined by reverse transcription-polymerase chain reaction analysis. IL-6-mediated STAT-3 regulation of PBEF was determined using a cell-permeable STAT-3 inhibitor peptide. Antigen-induced arthritis (AIA) was induced in wild-type (IL-6(+/+)) and IL-6-deficient (IL-6(-/-)) mice. PBEF and STAT were detected by immunohistochemistry, immunoblotting, and electrophoretic mobility shift assay. Synovial levels of PBEF were quantified by enzyme immunoassay. RESULTS IL-6 trans-signaling regulated PBEF in a STAT-3-dependent manner. In addition, PBEF was regulated by the IL-6-related cytokine OSM, but not IL-11 or LIF. Flow cytometric analysis of the IL-6-related cognate receptors suggested that OSM regulates PBEF via its OSM receptor beta and not its LIF receptor. The involvement of PBEF in arthritis progression was confirmed in vivo, where induction of AIA resulted in a 4-fold increase in the synovial expression of PBEF. In contrast, little or no change was observed in IL-6(-/-) mice, in which the inflammatory infiltrate was markedly reduced and synovial STAT-1/3 activity was also impaired. Analysis of human RA synovial tissue confirmed that PBEF immunolocalized in apical synovial membrane cells, endothelial cells, adipocytes, and lymphoid aggregates. Synovial fluid levels of PBEF were significantly higher in RA patients than in osteoarthritis patients. CONCLUSION Experiments presented herein demonstrate that PBEF is regulated via IL-6 trans-signaling and the IL-6-related cytokine OSM. PBEF is also actively expressed during arthritis. Although these data confirm an involvement of PBEF in disease progression, the consequence of its action remains to be determined.
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Affiliation(s)
- Mari A Nowell
- Medical Biochemistry and Immunology, Tenovus Building, School of Medicine, Heath Park Campus, Cardiff University, Cardiff CF14 4XN, UK.
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Osborne CS, Leitner I, Hofbauer B, Fielding CA, Favre B, Ryder NS. Biological, biochemical, and molecular characterization of a new clinical Trichophyton rubrum isolate resistant to terbinafine. Antimicrob Agents Chemother 2006; 50:2234-6. [PMID: 16723593 PMCID: PMC1479141 DOI: 10.1128/aac.01600-05] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2005] [Revised: 01/24/2006] [Accepted: 03/26/2006] [Indexed: 11/20/2022] Open
Abstract
We have characterized a new clinical strain of Trichophyton rubrum highly resistant to terbinafine but exhibiting normal susceptibility to drugs with other mechanisms of action. Resistance to terbinafine in this strain is caused by a missense mutation in the squalene epoxidase gene leading to the amino acid substitution F397L.
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Affiliation(s)
- Colin S Osborne
- Infectious Diseases, Novartis Institutes for BioMedical Research, Inc., Cambridge, MA 02139, USA.
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Monslow J, Williams JD, Fraser DJ, Michael DR, Foka P, Kift-Morgan AP, Luo DD, Fielding CA, Craig KJ, Topley N, Jones SA, Ramji DP, Bowen T. Sp1 and Sp3 mediate constitutive transcription of the human hyaluronan synthase 2 gene. J Biol Chem 2006; 281:18043-50. [PMID: 16603733 DOI: 10.1074/jbc.m510467200] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The linear glycosaminoglycan hyaluronan (HA) is synthesized at the plasma membrane by the HA synthase (HAS) enzymes HAS1, -2, and -3 and performs multiple functions as part of the vertebrate extracellular matrix. Up-regulation of HA synthesis in the renal corticointerstitium, and the resultant extracellular matrix expansion, is a common feature of renal fibrosis. However, the regulation of expression of these HAS isoforms at transcriptional and translational levels is poorly understood. We have recently described the genomic structures of the human HAS genes, thereby identifying putative promoter regions for each isoform. Further analysis of the HAS2 gene identified the transcription initiation site and showed that region F3, comprising the proximal 121 bp of promoter sequence, mediated full constitutive transcription. In the present study, we have analyzed this region in the human renal proximal tubular epithelial cell line HK-2. Electrophoretic mobility shift and promoter assay data demonstrated that transcription factors Sp1 and Sp3 bound to three sites immediately upstream of the HAS2 transcription initiation site and that mutation of the consensus recognition sequences within these sites ablated their transcriptional response. Furthermore, subsequent knockdown of Sp1 or Sp3 using small interfering RNAs decreased constitutive HAS2 mRNA synthesis. In contrast, significant binding of HK-2 nuclear proteins by putative upstream NF-Y, CCAAT, and NF-kappaB recognition sites was not observed. The identification of Sp1 and Sp3 as principal mediators of HAS2 constitutive transcription augments recent findings identifying upstream promoter elements and provides further insights into the mechanism of HAS2 transcriptional activation.
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Affiliation(s)
- Jamie Monslow
- Institute of Nephrology, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, Wales, UK
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Richards PJ, Nowell MA, Horiuchi S, McLoughlin RM, Fielding CA, Grau S, Yamamoto N, Ehrmann M, Rose-John S, Williams AS, Topley N, Jones SA. Functional characterization of a soluble gp130 isoform and its therapeutic capacity in an experimental model of inflammatory arthritis. ACTA ACUST UNITED AC 2006; 54:1662-72. [PMID: 16646038 DOI: 10.1002/art.21818] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Soluble gp130 is the naturally occurring antagonist of the interleukin-6 (IL-6)/soluble IL-6 receptor (sIL-6R) complex and selectively inhibits IL-6 trans-signaling. Several isoforms of soluble gp130 have been identified, including an autoantigenic form termed gp130-RAPS (for gp130 of the rheumatoid arthritis antigenic peptide-bearing soluble form) that is present in the serum and synovial fluid of patients with rheumatoid arthritis. The aim of this study was to evaluate the functional properties of gp130-RAPS. METHODS To define a role for gp130-RAPS in arthritis, a recombinant version was generated using a baculovirus expression system, and its activities were tested in vitro and in vivo. RESULTS Gp130-RAPS was shown to bind with high affinity to the stable IL-6/sIL-6R complex, hyper-IL-6, and to effectively modulate leukocyte migration in murine acute peritonitis. A single intraarticular injection of gp130-RAPS suppressed chronic antigen-induced arthritis in association with a reduction in local activation of signal transducer and activator of transcription 3. Although gp130-RAPS contains the previously identified autoantigenic sequence Asn-Ile-Ala-Ser-Phe (NIASF), no increase in the prevalence of anti- gp130-RAPS antibodies was observed in serum or synovial fluid obtained from patients with rheumatoid arthritis. CONCLUSION The use of inhibitory antibodies to block IL-6 responses has shown considerable clinical promise. However, the results presented herein suggest that selective targeting of IL-6 trans-signaling may represent a viable alternative to this strategy. In this respect, our present results suggest that the soluble gp130 isoform gp130-RAPS may be useful in the treatment of chronic inflammatory arthritis.
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Fielding CA, McLoughlin RM, Colmont CS, Kovaleva M, Harris DA, Rose-John S, Topley N, Jones SA. Viral IL-6 blocks neutrophil infiltration during acute inflammation. J Immunol 2005; 175:4024-9. [PMID: 16148151 DOI: 10.4049/jimmunol.175.6.4024] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Pathologies arising as a consequence of human herpesvirus-8 (HHV8) infections are closely associated with the autocrine activity of a HHV8 encoded IL-6 (vIL-6), which promotes proliferation of infected cells and their resistance to apoptosis. In this present report, studies show that vIL-6 may also be important in influencing the host's immunological response to secondary infections. Using peritoneal inflammation as a model of acute bacterial infection, vIL-6 was found to specifically block neutrophil recruitment in vivo through regulation of inflammatory chemokine expression. This response was substantiated in vitro where activation of STAT3 in human peritoneal mesothelial cells by vIL-6 was associated with enhanced CCL2 release. Although vIL-6 did not effect CXCL8 production, IL-1beta-induced secretion of this neutrophil-activating chemokine was significantly suppressed by vIL-6. These data suggest that vIL-6 has the capacity to suppress innate immune responses and thereby influence the outcome of opportunistic infections in HHV8-associated disease.
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Affiliation(s)
- Ceri A Fielding
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Wales, United Kingdom
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39
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Siebert S, Fielding CA, Williams BD, Brennan P. Mutation of the extracellular domain of tumour necrosis factor receptor 1 causes reduced NF-κB activation due to decreased surface expression. FEBS Lett 2005; 579:5193-8. [PMID: 16162344 DOI: 10.1016/j.febslet.2005.08.037] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2005] [Revised: 07/29/2005] [Accepted: 08/17/2005] [Indexed: 11/16/2022]
Abstract
Tumour necrosis factor receptor-associated periodic syndrome (TRAPS) results from point mutations in the extracellular domain of TNF receptor 1 (TNFRSF1A), but the effects of the mutations are controversial. This study shows that reduced NF-kappaB signalling is a feature of four TRAPS mutations. Reduced signalling correlates with reduced surface expression, measured by flow cytometry and microscopy. This suggests that correct formation of the extracellular domain of TNFRSF1A is important for localisation and receptor function. Importantly, our data provides a mechanism for the reduced TNFRSF1 signalling observed in a patient cell line.
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Affiliation(s)
- Stefan Siebert
- Department of Medical Biochemistry and Immunology, Wales College of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XX, United Kingdom
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40
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McLoughlin RM, Jenkins BJ, Grail D, Williams AS, Fielding CA, Parker CR, Ernst M, Topley N, Jones SA. IL-6 trans-signaling via STAT3 directs T cell infiltration in acute inflammation. Proc Natl Acad Sci U S A 2005; 102:9589-94. [PMID: 15976028 PMCID: PMC1172246 DOI: 10.1073/pnas.0501794102] [Citation(s) in RCA: 234] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2005] [Accepted: 05/23/2005] [Indexed: 11/18/2022] Open
Abstract
Interleukin (IL)-6 signaling through its soluble receptor (IL-6 transsignaling) directs transition between innate and acquired immune responses by orchestrating the chemokine-directed attraction and apoptotic clearance of leukocytes. Through analysis of mononuclear cell infiltration in WT and IL-6-deficient mice during peritoneal inflammation, we now report that IL-6 selectively governs T cell infiltration by regulating chemokine secretion (CXCL10, CCL4, CCL5, CCL11, and CCL17) and chemokine receptor (CCR3, CCR4, CCR5, and CXCR3) expression on the CD3+ infiltrate. Although blockade of IL-6 trans-signaling prevented chemokine release, chemokine receptor expression remained unaltered suggesting that this response is regulated by IL-6 itself. To dissect the signaling events promoting T cell migration, inflammation was established in knock-in mice expressing mutated forms of the universal signal-transducing element for IL-6-related cytokines gp130. In mice (gp130Y757F/Y757F) deficient in SHP2 and SOCS3 binding, but presenting hyperactivation of STAT1/3, T cell recruitment and CCL5 expression was enhanced. Conversely, both of these parameters were suppressed in mice with ablated gp130-mediated STAT1/3 activation (gp130DeltaSTAT/DeltaSTAT). T cell migration was related to STAT3 activity, because monoallelic deletion of Stat3 in gp130(Y757F/Y757F) mice (gp130Y757F/Y757F:Stat3+/-) corrected the exaggerated responses observed in gp130Y757F/Y757F mice. Consequently, STAT3 plays a defining role in IL-6-mediated T cell migration.
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Affiliation(s)
- Rachel M McLoughlin
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff CF14 4XN, Wales, United Kingdom
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41
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Siebert S, Amos N, Fielding CA, Wang ECY, Aksentijevich I, Williams BD, Brennan P. Reduced tumor necrosis factor signaling in primary human fibroblasts containing a tumor necrosis factor receptor superfamily 1A mutant. ACTA ACUST UNITED AC 2005; 52:1287-92. [PMID: 15818692 PMCID: PMC2842000 DOI: 10.1002/art.20955] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Tumor necrosis factor receptor-associated periodic syndrome (TRAPS) is an autoinflammatory syndrome associated with mutations in the gene that encodes tumor necrosis factor receptor superfamily 1A (TNFRSF1A). The purpose of this study was to describe a novel TNFRSF1A mutation (C43S) in a patient with TRAPS and to examine the effects of this TNFRSF1A mutation on tumor necrosis factor alpha (TNFalpha)-induced signaling in a patient-derived primary dermal fibroblast line. METHODS TNFRSF1A shedding from neutrophils was measured by flow cytometry and enzyme-linked immunosorbent assay (ELISA). Primary dermal fibroblast lines were established from the patient with the C43S TRAPS mutation and from healthy volunteers. Activation of NF-kappaB and activator protein 1 (AP-1) was evaluated by electrophoretic mobility shift assays. Cytokine production was measured by ELISA. Cell viability was measured by alamar blue assay. Apoptosis was measured by caspase 3 assay in the fibroblasts and by annexin V assay in peripheral blood mononuclear cells. RESULTS Activation-induced shedding of the TNFRSF1A from neutrophils was not altered by the C43S TRAPS mutation. TNFalpha-induced activation of NF-kappaB and AP-1 was decreased in the primary dermal fibroblasts with the C43S TNFRSF1A mutation. Nevertheless, the C43S TRAPS fibroblasts were capable of producing interleukin-6 (IL-6) and IL-8 in response to TNFalpha. However, TNFalpha-induced cell death and apoptosis were significantly decreased in the samples from the patient with the C43S TRAPS mutation. CONCLUSION The C43S TNFRSF1A mutation results in decreased TNFalpha-induced nuclear signaling and apoptosis. Our data suggest a new hypothesis, in that the C43S TRAPS mutation may cause the inflammatory phenotype by increasing resistance to TNFalpha-induced apoptosis.
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Affiliation(s)
- Stefan Siebert
- Section of Infection and Immunity, Wales College of Medicine, Cardiff University, Cardiff, UK.
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42
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Fielding CA, Siebert S, Rowe M, Brennan P. Analysis of human tumour necrosis factor receptor 1 dominant-negative mutants reveals a major region controlling cell surface expression. FEBS Lett 2004; 570:138-42. [PMID: 15251454 DOI: 10.1016/j.febslet.2004.06.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2004] [Revised: 05/18/2004] [Accepted: 06/03/2004] [Indexed: 10/26/2022]
Abstract
Tumour necrosis factor receptor 1 (TNFR1) plays a critical role in host defence and inflammation. We have identified a membrane proximal region (aa 218-324) of TNFR1 that restricts surface expression. This was prompted by comparing the dominant-negative properties of a C-terminal truncation of TNFR1 with a point mutant that prevents signalling. C-terminal truncation (aa 218-426) generates a better dominant-negative TNFR1 mutant than inactivation of the death domain by point mutation. The increased dominant-negative activity correlates with increased cell surface expression. The membrane proximal region is the most important region of the receptor for restricting expression.
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MESH Headings
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Cell Line, Tumor
- Cell Membrane/metabolism
- Cytoplasm/metabolism
- Dose-Response Relationship, Drug
- Flow Cytometry
- Genes, Dominant
- Genes, Reporter
- Genetic Vectors
- Green Fluorescent Proteins
- Humans
- Luciferases/metabolism
- Luminescent Proteins/metabolism
- Mutation
- NF-kappa B/metabolism
- Plasmids/metabolism
- Point Mutation
- Protein Structure, Tertiary
- Receptors, Tumor Necrosis Factor/genetics
- Receptors, Tumor Necrosis Factor/metabolism
- Receptors, Tumor Necrosis Factor, Type I
- Signal Transduction
- Structure-Activity Relationship
- Transfection
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Affiliation(s)
- Ceri A Fielding
- Infection and Immunity, University of Wales College of Medicine, Henry Wellcome Research Institute, Heath Park, Cardiff CF14 4XX, UK
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Fielding CA, Sandvej K, Mehl A, Brennan P, Jones M, Rowe M. Epstein-Barr virus LMP-1 natural sequence variants differ in their potential to activate cellular signaling pathways. J Virol 2001; 75:9129-41. [PMID: 11533177 PMCID: PMC114482 DOI: 10.1128/jvi.75.19.9129-9141.2001] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The latent membrane protein 1 (LMP-1) oncogene of Epstein-Barr virus (EBV) is believed to contribute to the development of many EBV-associated tumors, and there is evidence that sequence variation can affect some functions of LMP-1. Most studies have been restricted to the prototype B95.8 LMP-1 gene and genes isolated from EBV of nasopharyngeal carcinoma (NPC) patients. Here, we analyzed the signaling functions of LMP-1 from a panel of nine EBV isolates, including representatives of four defined groups of European LMP-1 variants (groups A to D [K. Sandvej, J. W. Gratama, M. Munch, X. G. Zhou, R. L. Bolhuis, B. S. Andresen, N. Gregersen, and S. Hamilton-Dutoit, Blood 90:323-330, 1997]) and Chinese NPC-derived LMP-1. Chinese and group D variants activated the transcription factor NF-kappa B two- to threefold more efficiently than B95.8 LMP-1, while Chinese, group B, and group D variants similarly activated activator protein 1 (AP-1) transcription more efficiently than did B95.8 LMP-1. However, there were no amino acid substitutions in the core binding regions for tumor necrosis factor receptor-associated adapter proteins known to mediate NF-kappa B and AP-1 activation. In contrast, despite sequence variation in the proposed Janus kinase 3 binding region, STAT activation was remarkably constant among the panel of LMP-1 variants. Analysis of the induction of CD54 (intercellular adhesion molecule 1) protein expression by the LMP-1 variants showed differences that did not correlate with either NF-kappa B or AP-1. Therefore, while the defined sequence variant groups do correlate with LMP-1 function, the results highlight the fact that the relationship between sequence variation and signaling function is extremely complex. It appears unlikely that one particular amino acid substitution or deletion will define a disease-associated variant of LMP-1.
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Affiliation(s)
- C A Fielding
- Section of Infection and Immunity, Department of Medicine, University of Wales College of Medicine, Cardiff CF14 4XN, Wales, United Kingdom
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