1
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Elhai M, Micheroli R, Houtman M, Mirrahimi M, Moser L, Pauli C, Bürki K, Laimbacher A, Kania G, Klein K, Schätzle P, Frank Bertoncelj M, Edalat SG, Keusch L, Khmelevskaya A, Toitou M, Geiss C, Rauer T, Sakkou M, Kollias G, Armaka M, Distler O, Ospelt C. The long non-coding RNA HOTAIR contributes to joint-specific gene expression in rheumatoid arthritis. Nat Commun 2023; 14:8172. [PMID: 38071204 PMCID: PMC10710443 DOI: 10.1038/s41467-023-44053-w] [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: 02/02/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
Although patients with rheumatoid arthritis (RA) typically exhibit symmetrical joint involvement, some patients develop alternative disease patterns in response to treatment, suggesting that different molecular mechanism may underlie disease progression depending on joint location. Here, we identify joint-specific changes in RA synovium and synovial fibroblasts (SF) between knee and hand joints. We show that the long non-coding RNA HOTAIR, which is only expressed in knee SF, regulates more than 50% of this site-specific gene expression in SF. HOTAIR is downregulated after stimulation with pro-inflammatory cytokines and is expressed at lower levels in knee samples from patients with RA, compared with osteoarthritis. Knockdown of HOTAIR in knee SF increases PI-Akt signalling and IL-6 production, but reduces Wnt signalling. Silencing HOTAIR inhibits the migratory function of SF, decreases SF-mediated osteoclastogenesis, and increases the recruitment of B cells by SF. We propose that HOTAIR is an important epigenetic factor in joint-specific gene expression in RA.
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Affiliation(s)
- Muriel Elhai
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Raphael Micheroli
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Miranda Houtman
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Masoumeh Mirrahimi
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Larissa Moser
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Chantal Pauli
- Institute for Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Kristina Bürki
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Andrea Laimbacher
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Gabriela Kania
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Kerstin Klein
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Rheumatology and Immunology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | | | - Mojca Frank Bertoncelj
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Sam G Edalat
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Leandra Keusch
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Alexandra Khmelevskaya
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Melpomeni Toitou
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Celina Geiss
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Thomas Rauer
- Department of Trauma Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Maria Sakkou
- Institute for Bioinnovation, Biomedical Sciences Research Center (BSRC) 'Alexander Fleming', Vari, Greece
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - George Kollias
- Institute for Bioinnovation, Biomedical Sciences Research Center (BSRC) 'Alexander Fleming', Vari, Greece
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Marietta Armaka
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Oliver Distler
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Caroline Ospelt
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland.
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2
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Martens A, Hertens P, Priem D, Rinotas V, Meletakos T, Gennadi M, Van Hove L, Louagie E, Coudenys J, De Muynck A, Gaublomme D, Sze M, van Hengel J, Catrysse L, Hoste E, Zajac JD, Davey RA, Van Hoorebeke L, Hochepied T, Bertrand MJM, Armaka M, Elewaut D, van Loo G. A20 controls RANK-dependent osteoclast formation and bone physiology. EMBO Rep 2022; 23:e55233. [PMID: 36194667 PMCID: PMC9724664 DOI: 10.15252/embr.202255233] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 04/12/2022] [Revised: 09/07/2022] [Accepted: 09/22/2022] [Indexed: 11/05/2022] Open
Abstract
The anti-inflammatory protein A20 serves as a critical brake on NF-κB signaling and NF-κB-dependent inflammation. In humans, polymorphisms in or near the TNFAIP3/A20 gene have been associated with several inflammatory disorders, including rheumatoid arthritis (RA), and experimental studies in mice have demonstrated that myeloid-specific A20 deficiency causes the development of a severe polyarthritis resembling human RA. Myeloid A20 deficiency also promotes osteoclastogenesis in mice, suggesting a role for A20 in the regulation of osteoclast differentiation and bone formation. We show here that osteoclast-specific A20 knockout mice develop severe osteoporosis, but not inflammatory arthritis. In vitro, osteoclast precursor cells from A20 deficient mice are hyper-responsive to RANKL-induced osteoclastogenesis. Mechanistically, we show that A20 is recruited to the RANK receptor complex within minutes of ligand binding, where it restrains NF-κB activation independently of its deubiquitinating activity but through its zinc finger (ZnF) 4 and 7 ubiquitin-binding functions. Together, these data demonstrate that A20 acts as a regulator of RANK-induced NF-κB signaling to control osteoclast differentiation, assuring proper bone development and turnover.
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Affiliation(s)
- Arne Martens
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Pieter Hertens
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Dario Priem
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Vagelis Rinotas
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | | | - Meropi Gennadi
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | - Lisette Van Hove
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Els Louagie
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Julie Coudenys
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | | | - Djoere Gaublomme
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Mozes Sze
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | | | - Leen Catrysse
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Esther Hoste
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Jeffrey D Zajac
- Department of Medicine, Austin HealthUniversity of MelbourneHeidelbergVictoriaAustralia
| | - Rachel A Davey
- Department of Medicine, Austin HealthUniversity of MelbourneHeidelbergVictoriaAustralia
| | | | - Tino Hochepied
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Mathieu J M Bertrand
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Marietta Armaka
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | - Dirk Elewaut
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Geert van Loo
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
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3
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Armaka M, Konstantopoulos D, Tzaferis C, Lavigne MD, Sakkou M, Liakos A, Sfikakis PP, Dimopoulos MA, Fousteri M, Kollias G. Single-cell multimodal analysis identifies common regulatory programs in synovial fibroblasts of rheumatoid arthritis patients and modeled TNF-driven arthritis. Genome Med 2022; 14:78. [PMID: 35879783 PMCID: PMC9316748 DOI: 10.1186/s13073-022-01081-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [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] [Received: 01/18/2022] [Accepted: 06/30/2022] [Indexed: 12/12/2022] Open
Abstract
Background Synovial fibroblasts (SFs) are specialized cells of the synovium that provide nutrients and lubricants for the proper function of diarthrodial joints. Recent evidence appreciates the contribution of SF heterogeneity in arthritic pathologies. However, the normal SF profiles and the molecular networks that govern the transition from homeostatic to arthritic SF heterogeneity remain poorly defined. Methods We applied a combined analysis of single-cell (sc) transcriptomes and epigenomes (scRNA-seq and scATAC-seq) to SFs derived from naïve and hTNFtg mice (mice that overexpress human TNF, a murine model for rheumatoid arthritis), by employing the Seurat and ArchR packages. To identify the cellular differentiation lineages, we conducted velocity and trajectory analysis by combining state-of-the-art algorithms including scVelo, Slingshot, and PAGA. We integrated the transcriptomic and epigenomic data to infer gene regulatory networks using ArchR and custom-implemented algorithms. We performed a canonical correlation analysis-based integration of murine data with publicly available datasets from SFs of rheumatoid arthritis patients and sought to identify conserved gene regulatory networks by utilizing the SCENIC algorithm in the human arthritic scRNA-seq atlas. Results By comparing SFs from healthy and hTNFtg mice, we revealed seven homeostatic and two disease-specific subsets of SFs. In healthy synovium, SFs function towards chondro- and osteogenesis, tissue repair, and immune surveillance. The development of arthritis leads to shrinkage of homeostatic SFs and favors the emergence of SF profiles marked by Dkk3 and Lrrc15 expression, functioning towards enhanced inflammatory responses and matrix catabolic processes. Lineage inference analysis indicated that specific Thy1+ SFs at the root of trajectories lead to the intermediate Thy1+/Dkk3+/Lrrc15+ SF states and culminate in a destructive and inflammatory Thy1− SF identity. We further uncovered epigenetically primed gene programs driving the expansion of these arthritic SFs, regulated by NFkB and new candidates, such as Runx1. Cross-species analysis of human/mouse arthritic SF data determined conserved regulatory and transcriptional networks. Conclusions We revealed a dynamic SF landscape from health to arthritis providing a functional genomic blueprint to understand the joint pathophysiology and highlight the fibroblast-oriented therapeutic targets for combating chronic inflammatory and destructive arthritic disease. Supplementary Information The online version contains supplementary material available at 10.1186/s13073-022-01081-3.
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Affiliation(s)
- Marietta Armaka
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.
| | - Dimitris Konstantopoulos
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Christos Tzaferis
- Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.,Center of New Biotechnologies & Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Matthieu D Lavigne
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.,Institute of Molecular Biology & Biotechnology, FORTH, Heraklion, Crete, Greece
| | - Maria Sakkou
- Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.,Center of New Biotechnologies & Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Anastasios Liakos
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Petros P Sfikakis
- Center of New Biotechnologies & Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece.,First Department of Propaedeutic Internal Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece.,Joint Rheumatology Program, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Meletios A Dimopoulos
- Center of New Biotechnologies & Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece.,Department of Clinical Therapeutics, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Maria Fousteri
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.
| | - George Kollias
- Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece. .,Center of New Biotechnologies & Precision Medicine, National and Kapodistrian University of Athens Medical School, Athens, Greece. .,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece. .,Joint Rheumatology Program, National and Kapodistrian University of Athens Medical School, Athens, Greece.
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4
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Kaaij MH, van Tok MN, Blijdorp IC, Ambarus CA, Stock M, Pots D, Knaup VL, Armaka M, Christodoulou-Vafeiadou E, van Melsen TK, Masdar H, Eskes HJPP, Yeremenko NG, Kollias G, Schett G, Tas SW, van Duivenvoorde LM, Baeten DLP. Transmembrane TNF drives osteoproliferative joint inflammation reminiscent of human spondyloarthritis. J Exp Med 2021; 217:151943. [PMID: 32662821 PMCID: PMC7537402 DOI: 10.1084/jem.20200288] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [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] [Received: 02/17/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 12/12/2022] Open
Abstract
TNF plays a key role in immune-mediated inflammatory diseases including rheumatoid arthritis (RA) and spondyloarthritis (SpA). It remains incompletely understood how TNF can lead to different disease phenotypes such as destructive peripheral polysynovitis in RA versus axial and peripheral osteoproliferative inflammation in SpA. We observed a marked increase of transmembrane (tm) versus soluble (s) TNF in SpA versus RA together with a decrease in the enzymatic activity of ADAM17. In contrast with the destructive polysynovitis observed in classical TNF overexpression models, mice overexpressing tmTNF developed axial and peripheral joint disease with synovitis, enthesitis, and osteitis. Histological and radiological assessment evidenced marked endochondral new bone formation leading to joint ankylosis over time. SpA-like inflammation, but not osteoproliferation, was dependent on TNF-receptor I and mediated by stromal tmTNF overexpression. Collectively, these data indicate that TNF can drive distinct inflammatory pathologies. We propose that tmTNF is responsible for the key pathological features of SpA.
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Affiliation(s)
- Merlijn H Kaaij
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Melissa N van Tok
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Iris C Blijdorp
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Carmen A Ambarus
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Michael Stock
- Medizinische Klinik 3 - Rheumatologie und Immunologie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Désiree Pots
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Véronique L Knaup
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Marietta Armaka
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming," Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Tessa K van Melsen
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Huriatul Masdar
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Harry J P P Eskes
- Department of Radiology, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Nataliya G Yeremenko
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - George Kollias
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming," Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Georg Schett
- Medizinische Klinik 3 - Rheumatologie und Immunologie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sander W Tas
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Leonie M van Duivenvoorde
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Dominique L P Baeten
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
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5
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Hayer S, Vervoordeldonk MJ, Denis MC, Armaka M, Hoffmann M, Bäcklund J, Nandakumar KS, Niederreiter B, Geka C, Fischer A, Woodworth N, Blüml S, Kollias G, Holmdahl R, Apparailly F, Koenders MI. 'SMASH' recommendations for standardised microscopic arthritis scoring of histological sections from inflammatory arthritis animal models. Ann Rheum Dis 2021; 80:714-726. [PMID: 33602797 PMCID: PMC8142455 DOI: 10.1136/annrheumdis-2020-219247] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [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: 10/06/2020] [Revised: 01/06/2021] [Accepted: 01/21/2021] [Indexed: 11/30/2022]
Abstract
Animal models for inflammatory arthritides such as rheumatoid arthritis (RA) and psoriatic arthritis are widely accepted and frequently used to identify pathological mechanisms and validate novel therapeutic strategies. Unfortunately, many publications reporting on these animal studies lack detailed description and appropriate assessment of the distinct histopathological features of arthritis: joint inflammation, cartilage damage and bone erosion. Therefore, the European consortium BeTheCure, consisting of 38 academic and industrial partners from 15 countries, set as goal to standardise the histological evaluation of joint sections from animal models of inflammatory arthritis. The consensual approach of a task force including 16 academic and industrial scientists as well as laboratory technicians has resulted in the development of the Standardised Microscopic Arthritis Scoring of Histological sections (‘SMASH’) recommendations for a standardised processing and microscopic scoring of the characteristic histopathological features of arthritis, exemplified by four different rodent models for arthritis: murine collagen-induced arthritis, collagen–antibody-induced arthritis, human tumour necrosis factor transgenic Tg197 mice and rat pristane-induced arthritis, applicable to any other inflammatory arthritis model. Through standardisation, the SMASH recommendations are designed to improve and maximise the information derived from in vivo arthritis experiments and to promote reproducibility and transparent reporting on such studies. In this manuscript, we will discuss and provide recommendations for analysis of histological joint sections: identification of the regions of interest, sample preparation, staining procedures and quantitative scoring methods. In conclusion, awareness of the different features of the arthritis pathology in animal models of inflammatory arthritis is of utmost importance for reliable research outcome, and the standardised histological processing and scoring methods in these SMASH recommendations will help increase uniformity and reproducibility in preclinical research on inflammatory arthritis.
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Affiliation(s)
- Silvia Hayer
- Department of Internal Medicine III, Division of Rheumatology, Medical University of Vienna, Vienna, Wien, Austria
| | | | | | - Marietta Armaka
- Department of Immunology, Biomedical Sciences Research Centre 'Alexander Fleming', Vari, Greece
| | - Markus Hoffmann
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Universitätsklinikum Erlangen, Erlangen, Germany
| | - Johan Bäcklund
- Department of Medical Biochemistry and Biophysics, Division of Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden
| | - Kutty Selva Nandakumar
- Department of Medical Biochemistry and Biophysics, Division of Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden.,School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Birgit Niederreiter
- Department of Internal Medicine III, Division of Rheumatology, Medical University of Vienna, Vienna, Wien, Austria
| | | | - Anita Fischer
- Department of Internal Medicine III, Division of Rheumatology, Medical University of Vienna, Vienna, Wien, Austria.,Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Vienna, Austria
| | | | - Stephan Blüml
- Department of Internal Medicine III, Division of Rheumatology, Medical University of Vienna, Vienna, Wien, Austria
| | - George Kollias
- Department of Immunology, Biomedical Sciences Research Centre 'Alexander Fleming', Vari, Greece.,Department of Physiology, Medical School, University of Athens, Athens, Greece
| | - Rikard Holmdahl
- Department of Medical Biochemistry and Biophysics, Division of Medical Inflammation Research, Karolinska Institute, Stockholm, Sweden
| | | | - Marije I Koenders
- Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
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6
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Christodoulou-Vafeiadou E, Geka C, Ntari L, Kranidioti K, Argyropoulou E, Meier F, Armaka M, Mourouzis I, Pantos C, Rouchota M, Loudos G, Denis MC, Karagianni N, Kollias G. Ectopic bone formation and systemic bone loss in a transmembrane TNF-driven model of human spondyloarthritis. Arthritis Res Ther 2020; 22:232. [PMID: 33023659 PMCID: PMC7542121 DOI: 10.1186/s13075-020-02327-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 05/05/2020] [Accepted: 09/22/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The transmembrane-TNF transgenic mouse, TgA86, has been shown to develop spontaneously peripheral arthritis with signs of axial involvement. To assess similarity to human spondyloarthritis, we performed detailed characterization of the axial, peripheral, and comorbid pathologies of this model. METHODS TgA86 bone pathologies were assessed at different ages using CT imaging of the spine, tail vertebrae, and hind limbs and characterized in detail by histopathological and immunohistochemical analysis. Cardiac function was examined by echocardiography and electrocardiography and bone structural parameters by μCT analysis. The response of TgA86 mice to either early or late anti-TNF treatment was evaluated clinically, histopathologically, and by μCT analysis. RESULTS TgA86 mice developed with 100% penetrance spontaneous axial and peripheral pathology which progressed with time and manifested as reduced body weight and body length, kyphosis, tail bendings, as well as swollen and distorted hind joints. Whole-body CT analysis at advanced ages revealed bone erosions of sacral and caudal vertebrae as well as of sacroiliac joints and hind limbs and, also, new ectopic bone formation and eventually vertebral fusion. The pathology of these mice highly resembled that of SpA patients, as it evolved through an early inflammatory phase, evident as enthesitis and synovitis in the affected joints, characterized by mesenchymal cell accumulation, and neutrophilic infiltration. Subsequently, regression of inflammation was accompanied by ectopic bone formation, leading to ankylosis. In addition, both systemic bone loss and comorbid heart valve pathology were evident. Importantly, early anti-TNF treatment, similar to clinical treatment protocols, significantly reduced the inflammatory phase of both the axial and peripheral pathology of TgA86 mice. CONCLUSIONS The TgA86 mice develop a spontaneous peripheral and axial biphasic pathology accompanied by comorbid heart valvular dysfunction and osteoporosis, overall reproducing the progression of pathognomonic features of human spondyloarthritis. Therefore, the TgA86 mouse represents a valuable model for deciphering the role of transmembrane TNF in the pathogenic mechanisms of spondyloarthritis and for assessing the efficacy of human therapeutics targeting different phases of the disease.
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Affiliation(s)
| | | | | | | | | | - Florian Meier
- Division of Rheumatology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.,Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Project Group Translational Medicine and Pharmacology TMP, Frankfurt am Main, Germany
| | - Marietta Armaka
- Institute of Immunology, Biomedical Sciences Research Center (BSRC), 'Alexander Fleming', 34 Alexander Fleming Street, 16672, Vari, Greece
| | - Iordanis Mourouzis
- Department of Pharmacology, School of Medicine, National Kapodistrian University, Athens, Greece
| | - Constantinos Pantos
- Department of Pharmacology, School of Medicine, National Kapodistrian University, Athens, Greece
| | - Maritina Rouchota
- BioEmission Technology Solutions (BIOEMTECH), Attica Technology Park N.C.S.R. "DEMOKRITOS", Athens, Greece
| | - George Loudos
- BioEmission Technology Solutions (BIOEMTECH), Attica Technology Park N.C.S.R. "DEMOKRITOS", Athens, Greece
| | | | | | - George Kollias
- Institute of Immunology, Biomedical Sciences Research Center (BSRC), 'Alexander Fleming', 34 Alexander Fleming Street, 16672, Vari, Greece. .,Department of Physiology, School of Medicine, National Kapodistrian University, Athens, Greece.
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7
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Koliaraki V, Prados A, Armaka M, Kollias G. The mesenchymal context in inflammation, immunity and cancer. Nat Immunol 2020; 21:974-982. [PMID: 32747813 DOI: 10.1038/s41590-020-0741-2] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 06/16/2020] [Indexed: 12/19/2022]
Abstract
Mesenchymal cells are mesoderm-derived stromal cells that are best known for providing structural support to organs, synthesizing and remodeling the extracellular matrix (ECM) and regulating development, homeostasis and repair of tissues. Recent detailed mechanistic insights into the biology of fibroblastic mesenchymal cells have revealed they are also significantly involved in immune regulation, stem cell maintenance and blood vessel function. It is now becoming evident that these functions, when defective, drive the development of complex diseases, such as various immunopathologies, chronic inflammatory disease, tissue fibrosis and cancer. Here, we provide a concise overview of the contextual contribution of fibroblastic mesenchymal cells in physiology and disease and bring into focus emerging evidence for both their heterogeneity at the single-cell level and their tissue-specific, spatiotemporal functional diversity.
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Affiliation(s)
- Vasiliki Koliaraki
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.
| | - Alejandro Prados
- Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Marietta Armaka
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - George Kollias
- Institute for Fundamental Biomedical Research, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece. .,Institute for Bioinnovation, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece. .,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
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Konstantopoulos D, Tzaferis C, Sakkou M, Liakos A, Lavigne M, Karamitros D, Fousteri M, Armaka M, Kollias G. OP0099 FUNCTIONAL MAPPING OF SYNOVIAL FIBROBLAST POPULATIONS IN HEALTH AND ARTHRITIC DISEASE: INSIGHTS INTO THE PATHOGENIC REMODELING OF SYNOVIAL MICROENVIRONMENT. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.1839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Our previous studies highlighted the fundamental in vivo role of synovial fibroblasts (SFs) in TNF-mediated murine chronic arthritis1,2and recent findings identified different SF identities based on their transcriptomic profiles with distinct contributions in acute, autoimmunity-based, murine arthritis3.Objectives:In this study, we focus on delineating the map of SF subpopulations in healthy joint and in the course of arthritic disease and the underlying regulatory networks functioning towards pathogenicity.Methods:Sorted single cell suspensions (CD45-, Pdpl+) and their fragmented nuclei from synovial joints of WT, early and late arthritic hTNFtg mice were processed for scRNAseq and scATAC employing a droplet-based technology (10x Genomics). To define the transcriptional and epigenetic signatures originating from the two different assays, we developed an integrative analysis pipeline based on the Seurat software package (v3.1). Meta-analysis of previously reported data of K/BxN serum transfer of arthritis was employed to define commonalities and differences in SF subsets among murine modelled disease.Results:The transition from healthy to chronically affected synovial microenvironment (SME) due to overexpression of hTNF is characterized by a dynamic transformation of SF clusters. The Lining arthritic Thy1lowsynovial layer (L-SFs) is hyper-populated while Sub-Lining Thy1highSF clusters (SL-SFs) are remodeled towards catabolic and inflammatory phenotypes compared to naïve SF organization pattern. Interestingly, trajectory analysis revealed that the SL clusters, which normally exhibit a gradual developmental-like process towards different profiles, differentially change during disease. We identified that the previously reported proliferating SL cluster is absent in healthy synovium, dominates mainly in early stages of chronic arthritis and it is closely related to the L-SFs. Mapping of the gene regulatory networks by RNAseq was supported by scATAC analysis. Similarly, meta-analysis of SF profiles derived from naïve and the K/BxN-serum–treated mice showed significant differences, possibly reflecting the phenotypes of the two established models of arthritis.Conclusion:Our approach unravels for the first time the regulatory heterogeneity and gene expression profiling of SF subpopulations in normal synovium, and reveals deep biological insights of the functional re-organization of SME during development of disease. It further identifies the common and divergent features of the different subtypes of murine arthritis that may well reflect the diversity of RA subtypes and the response to therapies.References:[1]Armaka et al; J Exp Med (2008): 205(2):331-7.[2]Armaka et al; Nat Commun (2018): 9(1):618.[3]Croft et al; Nature (2019): 570(7760):246-251.Disclosure of Interests:None declared
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9
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Polykratis A, Martens A, Eren RO, Shirasaki Y, Yamagishi M, Yamaguchi Y, Uemura S, Miura M, Holzmann B, Kollias G, Armaka M, van Loo G, Pasparakis M. A20 prevents inflammasome-dependent arthritis by inhibiting macrophage necroptosis through its ZnF7 ubiquitin-binding domain. Nat Cell Biol 2019; 21:731-742. [PMID: 31086261 DOI: 10.1038/s41556-019-0324-3] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 03/29/2019] [Indexed: 12/15/2022]
Abstract
Deficiency in the deubiquitinating enzyme A20 causes severe inflammation in mice, and impaired A20 function is associated with human inflammatory diseases. A20 has been implicated in negatively regulating NF-κB signalling, cell death and inflammasome activation; however, the mechanisms by which A20 inhibits inflammation in vivo remain poorly understood. Genetic studies in mice revealed that its deubiquitinase activity is not essential for A20 anti-inflammatory function. Here we show that A20 prevents inflammasome-dependent arthritis by inhibiting macrophage necroptosis and that this function depends on its zinc finger 7 (ZnF7). We provide genetic evidence that RIPK1 kinase-dependent, RIPK3-MLKL-mediated necroptosis drives inflammasome activation in A20-deficient macrophages and causes inflammatory arthritis in mice. Single-cell imaging revealed that RIPK3-dependent death caused inflammasome-dependent IL-1β release from lipopolysaccharide-stimulated A20-deficient macrophages. Importantly, mutation of the A20 ZnF7 ubiquitin binding domain caused arthritis in mice, arguing that ZnF7-dependent inhibition of necroptosis is critical for A20 anti-inflammatory function in vivo.
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Affiliation(s)
- Apostolos Polykratis
- Institute for Genetics, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine, University of Cologne, Cologne, Germany
| | - Arne Martens
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Remzi Onur Eren
- Institute for Genetics, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine, University of Cologne, Cologne, Germany
| | - Yoshitaka Shirasaki
- Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Tokyo, Japan.,Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Mai Yamagishi
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Yoshifumi Yamaguchi
- Department of Genetics, Graduate School of Pharmaceutical Science, The University of Tokyo, Tokyo, Japan.,Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
| | - Sotaro Uemura
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Masayuki Miura
- Department of Genetics, Graduate School of Pharmaceutical Science, The University of Tokyo, Tokyo, Japan
| | - Bernhard Holzmann
- Department of Surgery, School of Medicine, Technical University of Munich, Munich, Germany
| | - George Kollias
- Biomedical Sciences Research Center 'Alexander Fleming', Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Marietta Armaka
- Biomedical Sciences Research Center 'Alexander Fleming', Vari, Greece
| | - Geert van Loo
- VIB Center for Inflammation Research, Ghent, Belgium. .,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
| | - Manolis Pasparakis
- Institute for Genetics, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine, University of Cologne, Cologne, Germany.
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10
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Krishna-Subramanian S, Singer S, Armaka M, Banales JM, Holzer K, Schirmacher P, Walczak H, Kollias G, Pasparakis M, Kondylis V. RIPK1 and death receptor signaling drive biliary damage and early liver tumorigenesis in mice with chronic hepatobiliary injury. Cell Death Differ 2019; 26:2710-2726. [PMID: 30988397 DOI: 10.1038/s41418-019-0330-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/12/2019] [Accepted: 03/26/2019] [Indexed: 12/17/2022] Open
Abstract
Hepatocyte apoptosis is intrinsically linked to chronic liver disease and hepatocarcinogenesis. Conversely, necroptosis of hepatocytes and other liver cell types and its relevance for liver disease is debated. Using liver parenchymal cell (LPC)-specific TGF-beta-activated kinase 1 (TAK1)-deficient (TAK1LPC-KO) mice, which exhibit spontaneous hepatocellular and biliary damage, hepatitis, and early hepatocarcinogenesis, we have investigated the contribution of apoptosis and necroptosis in hepatocyte and cholangiocyte death and their impact on liver disease progression. Here, we provide in vivo evidence showing that TAK1-deficient cholangiocytes undergo spontaneous necroptosis induced primarily by TNFR1 and dependent on RIPK1 kinase activity, RIPK3, and NEMO. In contrast, TAK1-deficient hepatocytes die by FADD-dependent apoptosis, which is not significantly inhibited by LPC-specific RIPK1 deficiency, inhibition of RIPK1 kinase activity, RIPK3 deficiency or combined LPC-specific deletion of TNFR1, TRAILR, and Fas. Accordingly, normal mouse cholangiocytes can undergo necroptosis, while primary hepatocytes are resistant to it and die exclusively by apoptosis upon treatment with cell death-inducing stimuli in vitro, likely due to the differential expression of RIPK3. Interestingly, the genetic modifications that conferred protection from biliary damage also prevented the spontaneous lethality that was often observed in TAK1LPC-KO mice. In the presence of chronic hepatocyte apoptosis, preventing biliary damage delayed but did not avert hepatocarcinogenesis. On the contrary, inhibition of hepatocyte apoptosis fully prevented liver tumorigenesis even in mice with extensive biliary damage. Altogether, our results suggest that using RIPK1 kinase activity inhibitors could be therapeutically useful for cholestatic liver disease patients.
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Affiliation(s)
- Santosh Krishna-Subramanian
- Institute for Genetics, University of Cologne, D-50674, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Center for Molecular Medicine (CMMC), University of Cologne, Cologne, Germany
| | - Stephan Singer
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Institute of Pathology, University Medicine Greifswald, Greifswald, Germany
| | - Marietta Armaka
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Athens, Greece
| | - Jesus M Banales
- Department of Liver and Gastrointestinal Diseases, Biodonostia Health Research Institute, Donostia University Hospital, University of the Basque Country (UPV/EHU), CIBERehd, Ikerbasque, San Sebastian, Spain
| | - Kerstin Holzer
- Institute of Pathology, University Medicine Greifswald, Greifswald, Germany
| | - Peter Schirmacher
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Henning Walczak
- Centre for Cell Death, Cancer and Inflammation, Department of Cancer Biology, UCL Cancer Institute, University College London, London, United Kingdom
| | - George Kollias
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Athens, Greece.,Department of Physiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Manolis Pasparakis
- Institute for Genetics, University of Cologne, D-50674, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.,Center for Molecular Medicine (CMMC), University of Cologne, Cologne, Germany
| | - Vangelis Kondylis
- Institute for Genetics, University of Cologne, D-50674, Cologne, Germany. .,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany. .,Center for Molecular Medicine (CMMC), University of Cologne, Cologne, Germany.
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11
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Wroblewski R, Armaka M, Kondylis V, Pasparakis M, Walczak H, Mittrücker HW, Schramm C, Lohse AW, Kollias G, Ehlken H. Opposing role of tumor necrosis factor receptor 1 signaling in T cell-mediated hepatitis and bacterial infection in mice. Hepatology 2016; 64:508-21. [PMID: 26991125 DOI: 10.1002/hep.28551] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 03/03/2016] [Accepted: 03/09/2016] [Indexed: 12/19/2022]
Abstract
UNLABELLED Death receptor (DR) ligands such as tumor necrosis factor (TNF) have been identified as fundamental mediators of liver damage both in mouse models and in humans. While the essential site of function of DR signaling is conceivably the hepatocyte, a systematic analysis is missing. Using mice with conditional gene ablation, we analyzed the tissue-specific function of DR signaling in T cell-dependent (concanavalin A) and independent (lipopolysaccharide/galactosamine) hepatitis and in models of bacterial infection (Listeria monocytogenes, lipopolysaccharide). We report that lipopolysaccharide/galactosamine-induced liver injury depends on hepatocyte-intrinsic TNF receptor 1 (p55, TNFR1). In contrast, we show that T cell-induced hepatitis was independent of TNFR1 signaling in hepatocytes, T cells, or endothelial cells. Moreover, T cell-induced hepatitis was independent of hepatocyte-intrinsic Fas-associated protein with death domain, TNF-related apoptosis-inducing ligand receptor, or Fas signaling. Instead, concanavalin A-induced hepatitis was completely prevented in mice with myeloid-derived cell (MDC)-specific deletion of TNFR1. Significantly, however, mice lacking TNFR1 in MDCs succumbed to listeria infection, although they displayed similar sensitivity toward endotoxin-induced septic shock when compared to control mice. These results suggest that TNFR1 signaling in MDCs is a critical mediator of both the detrimental and the protective functions of TNF in T cell-induced hepatitis and bacterial infection, respectively. CONCLUSION The critical site of action of DRs is completely dependent on the nature of hepatitis; the data specify MDCs as the essential cell type of TNFR1 function in T cell-mediated hepatitis and in the response to listeria, thereby identifying the opposing role of MDC TNFR1 in autoimmunity and bacterial infection. (Hepatology 2016;64:508-521).
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Affiliation(s)
- Raluca Wroblewski
- I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Collaborative Research Centre 841, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marietta Armaka
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Vangelis Kondylis
- Institute for Genetics, University of Cologne, Cologne, Germany.,Centre for Molecular Medicine, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Manolis Pasparakis
- Institute for Genetics, University of Cologne, Cologne, Germany.,Centre for Molecular Medicine, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany
| | - Henning Walczak
- Centre for Cell Death, Cancer and Inflammation, UCL Cancer Institute, University College London, London, United Kingdom
| | - Hans-Willi Mittrücker
- Collaborative Research Centre 841, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christoph Schramm
- I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Collaborative Research Centre 841, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ansgar W Lohse
- I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Collaborative Research Centre 841, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - George Kollias
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece.,Department of Physiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Hanno Ehlken
- I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Collaborative Research Centre 841, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Interdisciplinary Endoscopy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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12
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Pallai A, Kiss B, Vereb G, Armaka M, Kollias G, Szekanecz Z, Szondy Z. OP0207 Transmembrane TNF-Alpha Reverse Signaling Leading To TGF-Beta Production Is Selectively Activated by Anti-TNF-Alpha Targeting Molecules. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1358] [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: 11/03/2022]
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13
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Roulis M, Bongers G, Armaka M, Salviano T, He Z, Singh A, Seidler U, Becker C, Demengeot J, Furtado GC, Lira SA, Kollias G. Host and microbiota interactions are critical for development of murine Crohn's-like ileitis. Mucosal Immunol 2016; 9:787-97. [PMID: 26487367 PMCID: PMC5027991 DOI: 10.1038/mi.2015.102] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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: 03/27/2015] [Accepted: 08/31/2015] [Indexed: 02/04/2023]
Abstract
Deregulation of host-microbiota interactions in the gut is a pivotal characteristic of Crohn's disease. It remains unclear, however, whether commensals and/or the dysbiotic microbiota associated with pathology in humans are causally involved in Crohn's pathogenesis. Here, we show that Crohn's-like ileitis in Tnf(ΔARE/+) mice is microbiota-dependent. Germ-free Tnf(ΔARE/+) mice are disease-free and the microbiota and its innate recognition through Myd88 are indispensable for tumor necrosis factor (TNF) overexpression and disease initiation in this model. The epithelium of diseased mice shows no major defects in mucus barrier and paracellular permeability. However, Tnf(ΔARE/+) ileitis associates with the reduction of lysozyme-expressing Paneth cells, mediated by adaptive immune effectors. Furthermore, we show that established but not early ileitis in Tnf(ΔARE/+) mice involves defective expression of antimicrobials and dysbiosis, characterized by Firmicutes expansion, including epithelial-attaching segmented filamentous bacteria, and decreased abundance of Bacteroidetes. Microbiota modulation by antibiotic treatment at an early disease stage rescues ileitis. Our results suggest that the indigenous microbiota is sufficient to drive TNF overexpression and Crohn's ileitis in the genetically susceptible Tnf(ΔARE/+) hosts, whereas dysbiosis in this model results from disease-associated alterations including loss of lysozyme-expressing Paneth cells.
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Affiliation(s)
- M Roulis
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece
| | - G Bongers
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - M Armaka
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece
| | - T Salviano
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Z He
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - A Singh
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - U Seidler
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - C Becker
- Department of Medicine 1, Universitätsklinikum der Friedrich-Alexander-Universität, Erlangen, Germany
| | - J Demengeot
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - GC Furtado
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - SA Lira
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA,Address correspondence to: Sergio Lira, Immunology Institute, Icahn School of Medicine at Mount Sinai, 1425 Madison Ave, Box 1630, New York, NY 10029-6574. Phone: 1-212-659-9404; Fax: 1-212-849-2525; and George Kollias, Biomedical Sciences Research Center “Alexander Fleming”, 34, Al. Fleming Street, 16672 Vari, Greece. Phone: +302109656507; Fax: +302109656563; and Department of Physiology, Medical School, National & Kapodistrian University of Athens, 75 Micras Asias, Goudi-Athens, 115 27, Greece. Phone: +302107462507; Fax: +30210-7462571;
| | - G Kollias
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece,Second address: Department of Physiology, Medical School, National & Kapodistrian University of Athens, Athens 11527, Greece,Address correspondence to: Sergio Lira, Immunology Institute, Icahn School of Medicine at Mount Sinai, 1425 Madison Ave, Box 1630, New York, NY 10029-6574. Phone: 1-212-659-9404; Fax: 1-212-849-2525; and George Kollias, Biomedical Sciences Research Center “Alexander Fleming”, 34, Al. Fleming Street, 16672 Vari, Greece. Phone: +302109656507; Fax: +302109656563; and Department of Physiology, Medical School, National & Kapodistrian University of Athens, 75 Micras Asias, Goudi-Athens, 115 27, Greece. Phone: +302107462507; Fax: +30210-7462571;
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Armaka M, Kollias G. A8.10 Cell death sensitisation in TNF-exposed IKK2-deficient synovial fibroblasts regulates disease outcome in modelled arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.163] [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: 11/03/2022]
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15
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Pallai A, Kiss B, Vereb G, Armaka M, Kollias G, Szekanecz Z, Szondy Z. Transmembrane TNF-α Reverse Signaling Inhibits Lipopolysaccharide-Induced Proinflammatory Cytokine Formation in Macrophages by Inducing TGF-β: Therapeutic Implications. J Immunol 2016; 196:1146-57. [PMID: 26729808 DOI: 10.4049/jimmunol.1501573] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 12/01/2015] [Indexed: 12/14/2022]
Abstract
TNF-α, a potent proinflammatory cytokine, is generated in a precursor form called transmembrane (m)TNF-α that is expressed as a type II polypeptide on the surface of certain cells. mTNF-α was shown to act both as a ligand by binding to TNF-α receptors, as well as a receptor that transmits outside-to-inside (reverse) signals back into the mTNF-α-bearing cells. In this study, we show that nonactivated macrophages express basal levels of mTNF-α and respond to anti-TNF-α Abs by triggering the MAPK kinase 4 signaling pathway. The pathway induces TGF-β. Based on inhibitory experiments, the production of TGF-β1 is regulated via Jun kinases, whereas that of other TGF-βs is regulated via p38 MAPKs. Exposure to LPS further induced the expression of mTNF-α, and triggering of mTNF-α strongly suppressed the LPS-induced proinflammatory response. Neutralizing TGF-β by Abs prevented the mTNF-α-mediated suppression of LPS-induced proinflammatory cytokine formation, indicating that the immune-suppressive effect of mTNF-α is mediated via TGF-β. Although apoptotic cells are also known to suppress LPS-induced proinflammatory cytokine formation in macrophages by upregulating TGF-β, we show that they do not use the mTNF-α signaling pathway. Because TGF-β possesses a wide range of immune-suppressive effects, our data indicate that upregulation of TGF-β synthesis by those TNF-α-targeting molecules, which are able to trigger mTNF-α, might contribute to their therapeutic effect in the treatment of certain inflammatory diseases such as Crohn's disease, Wegener's granulomatosis, or sarcoidosis. Additionally, none of the TNF-α-targeting molecules is expected to interfere with the immune-silencing effects of apoptotic cells.
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Affiliation(s)
- Anna Pallai
- Division of Dental Biochemistry, Department of Biochemistry and Molecular Biology, University of Debrecen, H-4012 Debrecen, Hungary
| | - Beáta Kiss
- Division of Dental Biochemistry, Department of Biochemistry and Molecular Biology, University of Debrecen, H-4012 Debrecen, Hungary
| | - György Vereb
- Department of Biophysics and Cell Biology, Research Center of Molecular Medicine, University of Debrecen, H-4012 Debrecen, Hungary
| | - Marietta Armaka
- Division of Immunology, Biomedical Sciences Research Center Alexander Fleming, 16672 Vari, Greece
| | - George Kollias
- Division of Immunology, Biomedical Sciences Research Center Alexander Fleming, 16672 Vari, Greece; Department of Physiology, School of Medicine, National and Kapodistrian University of Athens, 15771 Athens, Greece; and
| | - Zoltán Szekanecz
- Division of Rheumatology, Department of Internal Medicine, University of Debrecen, H-4012 Debrecen, Hungary
| | - Zsuzsa Szondy
- Division of Dental Biochemistry, Department of Biochemistry and Molecular Biology, University of Debrecen, H-4012 Debrecen, Hungary;
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Frank Bertoncelj M, Trenkmann M, Armaka M, Russo G, Bratus A, Kolling C, Michel B, Gay R, Buckley C, Kollias G, Gay S, Ospelt C. OP0071 Positional Coding and Noncoding Transcriptomes of Synovial Fibroblasts in Joint Specific Patterns of Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4057] [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: 11/03/2022]
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17
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Danks L, Komatsu N, Guerrini MM, Sawa S, Armaka M, Kollias G, Nakashima T, Takayanagi H. RANKL expressed on synovial fibroblasts is primarily responsible for bone erosions during joint inflammation. Ann Rheum Dis 2015; 75:1187-95. [PMID: 26025971 DOI: 10.1136/annrheumdis-2014-207137] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 05/01/2015] [Indexed: 11/04/2022]
Abstract
OBJECTIVE RANKL is mainly expressed by synovial fibroblasts and T cells within the joints of rheumatoid arthritis patients. The relative importance of RANKL expression by these cell types for the formation of bone erosions is unclear. We therefore aimed to quantify the contribution of RANKL by each cell type to osteoclast differentiation and bone destruction during inflammatory arthritis. METHODS RANKL was specifically deleted in T cells (Tnfsf11(flox/Δ) Lck-Cre), in collagen VI expressing cells including synovial fibroblasts (Tnfsf11(flox/Δ) Col6a1-Cre) and in collagen II expressing cells including articular chondrocytes (Tnfsf11(flox/Δ) Col2a1-Cre). Erosive disease was induced using the collagen antibody-induced arthritis (CAIA) and collagen-induced arthritis (CIA) models. Osteoclasts and cartilage degradation were assessed by histology and bone erosions were assessed by micro-CT. RESULTS The inflammatory joint score during CAIA was equivalent in all mice regardless of cell-targeted deletion of RANKL. Significant increases in osteoclast numbers and bone erosions were observed in both the Tnfsf11(flox/Δ) and the Tnfsf11(flox/Δ) Lck-Cre groups during CAIA; however, the Tnfsf11(flox/Δ) Col6a1-Cre mice showed significant protection against osteoclast formation and bone erosions. Similar results on osteoclast formation and bone erosions were obtained in CIA mice. The deletion of RANKL on any cell type did not prevent articular cartilage loss in either model of arthritis used. CONCLUSIONS The expression of RANKL on synovial fibroblasts rather than T cells is predominantly responsible for the formation of osteoclasts and erosions during inflammatory arthritis. Synovial fibroblasts would be the best direct target in RANKL inhibition therapies.
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Affiliation(s)
- Lynett Danks
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan Explorative Research for Advanced Technology (ERATO) Program, Japan Science and Technology Agency (JST), Takayanagi Osteonetwork Project, Tokyo, Japan
| | - Noriko Komatsu
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Matteo M Guerrini
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan Explorative Research for Advanced Technology (ERATO) Program, Japan Science and Technology Agency (JST), Takayanagi Osteonetwork Project, Tokyo, Japan
| | - Shinichiro Sawa
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan Explorative Research for Advanced Technology (ERATO) Program, Japan Science and Technology Agency (JST), Takayanagi Osteonetwork Project, Tokyo, Japan
| | - Marietta Armaka
- Institute of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - George Kollias
- Institute of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Vari, Greece
| | - Tomoki Nakashima
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), Tokyo, Japan
| | - Hiroshi Takayanagi
- Department of Immunology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan Explorative Research for Advanced Technology (ERATO) Program, Japan Science and Technology Agency (JST), Takayanagi Osteonetwork Project, Tokyo, Japan
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Aradi B, Armaka M, Filková M, Kato M, Klein K, Scharl M, Michel B, Senolt L, Gay R, Buzás E, Kollias G, Gay S, Jüngel A. AB0114 Comparative Analysis of the Expression of Protein Tyrosine Phosphatase Non-Receptor Type 2 (PTPN2) in Autoimmune Disease. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4212] [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: 11/03/2022]
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Van Hauwermeiren F, Armaka M, Karagianni N, Kranidioti K, Vandenbroucke RE, Loges S, Van Roy M, Staelens J, Puimège L, Palagani A, Berghe WV, Victoratos P, Carmeliet P, Libert C, Kollias G. Safe TNF-based antitumor therapy following p55TNFR reduction in intestinal epithelium. J Clin Invest 2013; 123:2590-603. [PMID: 23676465 DOI: 10.1172/jci65624] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 03/21/2013] [Indexed: 12/25/2022] Open
Abstract
TNF has remarkable antitumor activities; however, therapeutic applications have not been possible because of the systemic and lethal proinflammatory effects induced by TNF. Both the antitumor and inflammatory effects of TNF are mediated by the TNF receptor p55 (p55TNFR) (encoded by the Tnfrsf1a gene). The antitumor effect stems from an induction of cell death in tumor endothelium, but the cell type that initiates the lethal inflammatory cascade has been unclear. Using conditional Tnfrsf1a knockout or reactivation mice, we found that the expression level of p55TNFR in intestinal epithelial cells (IECs) is a crucial determinant in TNF-induced lethal inflammation. Remarkably, tumor endothelium and IECs exhibited differential sensitivities to TNF when p55TNFR levels were reduced. Tumor-bearing Tnfrsf1a⁺⁺/⁻ or IEC-specific p55TNFR-deficient mice showed resistance to TNF-induced lethality, while the tumor endothelium remained fully responsive to TNF-induced apoptosis and tumors regressed. We demonstrate proof of principle for clinical application of this approach using neutralizing anti-human p55TNFR antibodies in human TNFRSF1A knockin mice. Our results uncover an important cellular basis of TNF toxicity and reveal that IEC-specific or systemic reduction of p55TNFR mitigates TNF toxicity without loss of antitumor efficacy.
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Vasilopoulos Y, Gkretsi V, Armaka M, Aidinis V, Kollias G. Actin cytoskeleton dynamics linked to synovial fibroblast activation as a novel pathogenic principle in TNF-driven arthritis. Ann Rheum Dis 2007; 66 Suppl 3:iii23-8. [PMID: 17934089 DOI: 10.1136/ard.2007.079822] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Rheumatoid arthritis is a chronic inflammatory disorder whose origin of defect has been the subject of extensive research during the past few decades. While a number of immune and non-immune cell types participate in the development of chronic destructive inflammation in the arthritic joint, synovial fibroblasts have emerged as key effector cells capable of modulating both joint destruction and propagation of inflammation. Ample evidence of aberrant changes in the morphology and biochemical behaviour of rheumatoid arthritis synovial fibroblasts have established the tissue evading and "transformed" character of this cell type. We have recently demonstrated that actin cytoskeletal rearrangements determine the pathogenic activation of synovial fibroblasts in modelled TNF-mediated arthritis, a finding correlating with similar gene expression changes which we observed in human rheumatoid arthritis synovial fibroblasts. Here, we show that pharmacological inhibition of actin cytoskeleton dynamics alters potential pathogenic properties of the arthritogenic synovial fibroblast, such as proliferation, migration and resistance to apoptosis, indicating novel opportunities for therapeutic intervention in arthritis. Recent advances in this field of research are reviewed and discussed.
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Affiliation(s)
- Y Vasilopoulos
- Institute of Immunology, Biomedical Sciences Research Center "Alexander Fleming", Athens, Greece
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Aidinis V, Chandras C, Manoloukos M, Thanassopoulou A, Kranidioti K, Armaka M, Douni E, Kontoyiannis DL, Zouberakis M, Kollias G. MUGEN mouse database; animal models of human immunological diseases. Nucleic Acids Res 2007; 36:D1048-54. [PMID: 17932065 PMCID: PMC2238830 DOI: 10.1093/nar/gkm838] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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: 11/30/2022] Open
Abstract
The MUGEN mouse database (MMdb) (www.mugen-noe.org/database/) is a database of murine models of immune processes and immunological diseases. Its aim is to share and publicize information on mouse strain characteristics and availability from participating institutions. MMdb's basic classification of models is based on three major research application categories: Models of Human Disease, Models of Immune Processes and Transgenic Tools. Data on mutant strains includes detailed information on affected gene(s), mutant allele(s) and genetic background (DNA origin, gene targeted, host and backcross strain background). Each gene/transgene index also includes IDs and direct links to Ensembl, ArrayExpress, EURExpress and NCBI's Entrez Gene database. Phenotypic description is standardized and hierarchically structured, based on MGI's mammalian phenotypic ontology terms. Availability (e.g. live mice, cryopreserved embryos, sperm and ES cells) is clearly indicated, along with handling and genotyping details (in the form of documents or hyperlinks) and all relevant contact information (including EMMA and Jax/IMSR hyperlinks where available). MMdb's design offers a user-friendly query interface and provides instant access to the list of mutant strains and genes. Database access is free of charge and there are no registration requirements for data querying.
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Affiliation(s)
- V Aidinis
- B.S.R.C. Alexander Fleming, 34 Fleming Street, 16672, Vari, Greece.
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Abstract
Isoborneol, a monoterpene and a component of several plant essential oils, showed dual viricidal activity against herpes simplex virus 1 (HSV-1). First, it inactivated HSV-1 by almost 4 log10 values within 30 min of exposure, and second, isoborneol at a concentration of 0.06% completely inhibited viral replication, without affecting viral adsorption. Isoborneol did not exhibit significant cytotoxicity at concentrations ranging between 0.016% and 0.08% when tested against human and monkey cell lines. Isoborneol specifically inhibited glycosylation of viral polypeptides based on the following data: (1) the mature fully glycosylated forms of two viral glycoproteins gB and gD were not detected when the virus was replicated in the presence of isoborneol, (2) no major changes were observed in the glycosylation pattern of cellular polypeptides between untreated and isoborneol treated Vero cells, (3) isoborneol did not affect the glycosylation of gB produced from a copy of the gB gene resident in the cellular genome, and (4) other monoterpenes such as 1,8-cineole and borneol, a stereoisomer of isoborneol, did not inhibit HSV-1 glycosylation.
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Affiliation(s)
- M Armaka
- Laboratory of General Microbiology, School of Biology, Aristotle University, Thessaloniki, Greece
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