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Buckley BJ, Ali U, Kelso MJ, Ranson M. The Urokinase Plasminogen Activation System in Rheumatoid Arthritis: Pathophysiological Roles and Prospective Therapeutic Targets. Curr Drug Targets 2020; 20:970-981. [PMID: 30516104 PMCID: PMC6700755 DOI: 10.2174/1389450120666181204164140] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 11/12/2018] [Accepted: 11/28/2018] [Indexed: 01/09/2023]
Abstract
Rheumatoid Arthritis (RA) is a chronic and progressive inflammatory disease characterized in its early stages by synovial hyperplasia and inflammatory cell infiltration and later by irreversible joint tissue destruction. The Plasminogen Activation System (PAS) is associated with a wide range of physiological and pathophysiological states involving fibrinolysis, inflammation and tissue remodeling. Various components of the PAS are implicated in the pathophysiology of RA. Urokinase Plasminogen Activator (uPA) in particular is a pro-inflammatory mediator that appears to play an important role in the bone and cartilage destruction associated with RA. Clinical studies have shown that uPA and its receptor uPAR are overexpressed in synovia of patients with rheumatoid arthritis. Further, genetic knockdown and antibody-mediated neutralization of uPA have been shown to be protective against induction or progression of arthritis in animal models. The pro-arthritic role of uPA is differentiated from its haemodynamic counterpart, tissue plasminogen activator (tPA), which appears to play a protective role in RA animal models. This review summarises available evidence supporting the PAS as a critical determinant of RA pathogenesis and highlights opportunities for the development of novel uPAS-targeting therapeutics.
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Affiliation(s)
- Benjamin J Buckley
- School of Chemistry and Molecular Bioscience, University of Wollongong, NSW 2522, Australia.,Illawarra Health & Medical Research Institute, Wollongong, NSW 2522, Australia
| | - Umar Ali
- School of Chemistry and Molecular Bioscience, University of Wollongong, NSW 2522, Australia.,Illawarra Health & Medical Research Institute, Wollongong, NSW 2522, Australia
| | - Michael J Kelso
- School of Chemistry and Molecular Bioscience, University of Wollongong, NSW 2522, Australia.,Illawarra Health & Medical Research Institute, Wollongong, NSW 2522, Australia
| | - Marie Ranson
- School of Chemistry and Molecular Bioscience, University of Wollongong, NSW 2522, Australia.,Illawarra Health & Medical Research Institute, Wollongong, NSW 2522, Australia
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Abstract
In vivo mouse models of inflammatory arthritis are extensively used to investigate pathogenic mechanisms governing inflammation-driven joint damage. Two commonly utilized models include collagen-induced arthritis (CIA) and methylated bovine serum albumin (mBSA) antigen-induced arthritis (AIA). These offer unique advantages for modeling different aspects of human disease. CIA involves breach of immunological tolerance resulting in systemic autoantibody-driven arthritis, while AIA results in local resolving inflammatory flares and articular T cell-mediated damage. Despite limitations that apply to all animal models of human disease, CIA and AIA have been instrumental in identifying pathogenic mediators, immune cell subsets and stromal cell responses that determine disease onset, progression, and severity. Moreover, these models have enabled investigation of disease phases not easily studied in patients and have served as testing beds for novel biological therapies, including cytokine blockers and small molecule inhibitors of intracellular signaling that have revolutionized rheumatoid arthritis treatment.
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MESH Headings
- Animals
- Antigens/adverse effects
- Arthritis, Experimental/etiology
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Arthritis, Rheumatoid/etiology
- Arthritis, Rheumatoid/metabolism
- Arthritis, Rheumatoid/pathology
- Cytokines/metabolism
- Disease Models, Animal
- Humans
- Inflammation/etiology
- Inflammation/metabolism
- Inflammation/pathology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Serum Albumin, Bovine/administration & dosage
- Serum Albumin, Bovine/immunology
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Affiliation(s)
- Gareth W Jones
- Division of Infection and Immunity, Systems Immunity University Research Institute, School of Medicine, Cardiff University, Cardiff, Wales, UK.
| | - David G Hill
- Division of Infection and Immunity, Systems Immunity University Research Institute, School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - Katie Sime
- Division of Infection and Immunity, Systems Immunity University Research Institute, School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - Anwen S Williams
- Division of Infection and Immunity, Systems Immunity University Research Institute, School of Medicine, Cardiff University, Cardiff, Wales, UK
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Cook AD, Louis C, Robinson MJ, Saleh R, Sleeman MA, Hamilton JA. Granulocyte macrophage colony-stimulating factor receptor α expression and its targeting in antigen-induced arthritis and inflammation. Arthritis Res Ther 2016; 18:287. [PMID: 27908288 PMCID: PMC5134062 DOI: 10.1186/s13075-016-1185-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 11/16/2016] [Indexed: 12/23/2022] Open
Abstract
Background Blockade of granulocyte macrophage colony-stimulating factor (GM-CSF) and its receptor (GM-CSFRα) is being successfully tested in trials in rheumatoid arthritis (RA) with clinical results equivalent to those found with neutralization of the current therapeutic targets, TNF and IL-6. To explore further the role of GM-CSF as a pro-inflammatory cytokine, we examined the effect of anti-GM-CSFRα neutralization on myeloid cell populations in antigen-driven arthritis and inflammation models and also compared its effect with that of anti-TNF and anti-IL-6. Methods Cell population changes upon neutralization by monoclonal antibodies (mAbs) in the antigen-induced arthritis (AIA) and antigen-induced peritonitis (AIP) models were monitored by flow cytometry and microarray. Adoptive transfer of monocytes into the AIP cavity was used to assess the GM-CSF dependence of the development of macrophages and monocyte-derived dendritic cells (Mo-DCs) at a site of inflammation. Results Therapeutic administration of a neutralizing anti-GM-CSF mAb, but not of an anti-colony-stimulating factor (anti-CSF)-1 or an anti-CSF-1R mAb, ameliorated AIA disease. Using the anti-GM-CSFRα mAb, the relative surface expression of different inflammatory myeloid populations was found to be similar in the inflamed tissues in both the AIA and AIP models; however, the GM-CSFRα mAb, but not neutralizing anti-TNF and anti-IL-6 mAbs, preferentially depleted Mo-DCs from these sites. In addition, we were able to show that locally acting GM-CSF upregulated macrophage/Mo-DC numbers via GM-CSFR signalling in donor monocytes. Conclusions Our findings suggest that GM-CSF blockade modulates inflammatory responses differently to TNF and IL-6 blockade and may provide additional insight into how targeting the GM-CSF/GM-CSFRα system is providing efficacy in RA. Electronic supplementary material The online version of this article (doi:10.1186/s13075-016-1185-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrew D Cook
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Parkville, Victoria, 3050, Australia.
| | - Cynthia Louis
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Parkville, Victoria, 3050, Australia
| | - Matthew J Robinson
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune Ltd, Granta Park, Cambridge, CB21 6GH, UK
| | - Reem Saleh
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Parkville, Victoria, 3050, Australia
| | - Matthew A Sleeman
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune Ltd, Granta Park, Cambridge, CB21 6GH, UK.,, Present Address: Regeneron, 777 Old Saw Mill River Rd, Tarrytown, NY, USA
| | - John A Hamilton
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Parkville, Victoria, 3050, Australia
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Bas DB, Su J, Wigerblad G, Svensson CI. Pain in rheumatoid arthritis: models and mechanisms. Pain Manag 2016; 6:265-84. [PMID: 27086843 DOI: 10.2217/pmt.16.4] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pain is one of the most challenging symptoms for patients with rheumatoid arthritis (RA). RA-related pain is frequently considered to be solely a consequence of inflammation in the joints; however, recent studies show that multiple mechanisms are involved. Indeed, RA pain may start even before the disease manifests, and frequently does not correlate with the degree of inflammation or pharmacological management. In this aspect, animal studies have the potential to provide new insights into the pathology that initiate and maintain pain in RA. The focus of this review is to describe the most commonly used animal models for studies of RA pathology, which have also been utilized in pain research, and to summarize findings providing potential clues to the mechanisms involved in the regulation of RA-induced pain.
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Affiliation(s)
- Duygu B Bas
- Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Jie Su
- Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Gustaf Wigerblad
- Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Camilla I Svensson
- Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm 171 77, Sweden
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Khodabandehlou K, Tian S, Luft JC, Khan SA, DeSimone JM. Particles for Local Delivery of Proteins Using Intra-Articular Route. Adv Healthc Mater 2016; 5:653-8, 626. [PMID: 26833828 PMCID: PMC4852977 DOI: 10.1002/adhm.201500797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/11/2015] [Indexed: 11/10/2022]
Abstract
Designing a vehicle for local delivery of proteins using intra-articular route is an attractive option to minimize the adverse effects associated with systemic exposure and to maximize the efficacy. Slowly dissolving silylated microparticles are designed with specific size and shape that are capable of extending the retention time of a model protein (bovine serum albumin) in the murine knee joint. No cytotoxicity is observed for the reconstituted formulation when tested against synovial fibroblasts and RAW 264.7 macrophages.
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Affiliation(s)
- Khosrow Khodabandehlou
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Shaomin Tian
- Department of Chemistry, and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA
| | - James C. Luft
- Department of Chemistry, and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA. Institute for Nanomedicine, Eshelman School of Pharmacy, and Institute for Advanced Materials, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Saad A. Khan
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Joseph M. DeSimone
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA. Department of Chemistry, and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA. Institute for Nanomedicine, Eshelman School of Pharmacy, and Institute for Advanced Materials, University of North Carolina, Chapel Hill, NC 27599, USA. Sloan-Kettering Institute for Cancer Research, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA
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van den Berg WB. Animal models of arthritis. Rheumatology (Oxford) 2015. [DOI: 10.1016/b978-0-323-09138-1.00090-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Di Domizio J, Dorta-Estremera S, Cao W. Methylated BSA mimics amyloid-related proteins and triggers inflammation. PLoS One 2013; 8:e63214. [PMID: 23650555 PMCID: PMC3641125 DOI: 10.1371/journal.pone.0063214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 04/01/2013] [Indexed: 11/19/2022] Open
Abstract
The mechanistic study of inflammatory or autoimmune diseases requires the generation of mouse models that reproduce the alterations in immune responses observed in patients. Methylated bovine serum albumin (mBSA) has been widely used to induce antigen-specific inflammation in targeted organs or in combination with single stranded DNA (ssDNA) to generate anti-nucleic acids antibodies in vivo. However, the mechanism by which this modified protein triggers inflammation is poorly understood. By analyzing the biochemical properties of mBSA, we found that mBSA exhibits features of an intermediate of protein misfolding pathway. mBSA readily interact with a list of dyes that have binding specificity towards amyloid fibrils. Intriguingly, mBSA displayed cytotoxic activity and its binding to ssDNA further enhanced formation of beta-sheet rich amyloid fibrils. Moreover, mBSA is recognized by the serum amyloid P, a protein unanimously associated with amyloid plaques in vivo. In macrophages, we observed that mBSA disrupted the lysosomal compartment, signaled along the NLRP3 inflammasome pathway, and activated caspase 1, which led to the production of IL-1β. In vivo, mBSA triggered rapid and prominent immune cell infiltration that is dependent on IL-1β induction. Taken together, these data demonstrate that by mimicking amyloidogenic proteins mBSA exhibits strong innate immune functions and serves as a potent adjuvant. These findings advance our understanding on the underlying mechanism of how aberrant immune responses lead to autoimmune reactions.
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Affiliation(s)
- Jeremy Di Domizio
- Department of Immunology, University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Stephanie Dorta-Estremera
- Department of Immunology, University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Wei Cao
- Department of Immunology, University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail:
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8
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van den Berg WB. Animal models of arthritis. Rheumatology (Oxford) 2011. [DOI: 10.1016/b978-0-323-06551-1.00087-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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9
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Rodent preclinical models for developing novel antiarthritic molecules: comparative biology and preferred methods for evaluating efficacy. J Biomed Biotechnol 2010; 2011:569068. [PMID: 21253435 PMCID: PMC3022224 DOI: 10.1155/2011/569068] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Accepted: 10/20/2010] [Indexed: 12/31/2022] Open
Abstract
Rodent models of immune-mediated arthritis (RMIA) are the conventional approach to evaluating mechanisms of inflammatory joint disease and the comparative efficacy of antiarthritic agents. Rat adjuvant-induced (AIA), collagen-induced (CIA), and streptococcal cell wall-induced (SCW) arthritides are preferred models of the joint pathology that occurs in human rheumatoid arthritis (RA). Lesions of AIA are most severe and consistent; structural and immunological changes of CIA best resemble RA. Lesion extent and severity in RMIA depends on experimental methodology (inciting agent, adjuvant, etc.) and individual physiologic parameters (age, genetics, hormonal status, etc.). The effectiveness of antiarthritic molecules varies with the agent, therapeutic regimen, and choice of RMIA. All RMIA are driven by overactivity of proinflammatory pathways, but the dominant molecules differ among the models. Hence, as with the human clinical experience, the efficacy of various antiarthritic molecules differs among RMIA, especially when the agent is a specific cytokine inhibitor.
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Dai L, Zhu LJ, Zheng DH, Mo YQ, Wei XN, Su JH, Pessler F, Zhang BY. Elevated serum glucose-6-phosphate isomerase correlates with histological disease activity and clinical improvement after initiation of therapy in patients with rheumatoid arthritis. J Rheumatol 2010; 37:2452-61. [PMID: 20810510 DOI: 10.3899/jrheum.100157] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To determine serum glucose-6-phosphate isomerase (GPI) concentrations in patients with rheumatoid arthritis (RA), and to test whether they correlate with objective measures of disease activity. METHODS Sera from 116 patients with RA, 69 patients with non-RA rheumatic diseases, and 101 healthy controls were analyzed. Levels of soluble serum GPI were measured by ELISA. Histological disease activity was determined with the synovitis score in synovial needle biopsies from 58 of the 116 patients with RA. Thirty-one of the 58 synovium samples were stained for CD68, CD3, CD20, CD38, CD79a, and CD34 by immunohistochemistry. Demographic data were collected, as well as serological and clinical variables that indicate RA disease activity, for Spearman correlation analysis. RESULTS Serum GPI level correlated positively with the synovitis score (r = 0.278, p = 0.034). Significantly higher soluble GPI levels were detected in the RA sera compared with sera from healthy controls and the non-RA disease controls (2.25 ± 2.82 vs 0.03 ± 0.05 and 0.19 ± 0.57 μg/ml, respectively; p < 0.0001). The rate of serum GPI positivity was significantly higher in the RA patients than in the non-RA disease controls (64.7% vs 10.1%; p < 0.0001). Spearman analysis showed no significant correlation between serum GPI level and Disease Activity Score in 28 joints at baseline. After initiation of antirheumatic treatments, GPI levels decreased significantly (2.81 ± 3.12 vs 1.44 ± 2.09 μg/ml; p = 0.016), paralleling improvement of the disease activity indices. CONCLUSION Elevated serum GPI may be involved in the synovitis of RA and may prove useful as a serum marker for disease activity of RA.
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Affiliation(s)
- Lie Dai
- Department of Rheumatology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China.
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11
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Byun S, Tortorella MD, Malfait AM, Fok K, Frank EH, Grodzinsky AJ. Transport and equilibrium uptake of a peptide inhibitor of PACE4 into articular cartilage is dominated by electrostatic interactions. Arch Biochem Biophys 2010; 499:32-9. [PMID: 20447377 DOI: 10.1016/j.abb.2010.04.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2009] [Revised: 04/22/2010] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
Abstract
The availability of therapeutic molecules to targets within cartilage depends on transport through the avascular matrix. We studied equilibrium partitioning and non-equilibrium transport into cartilage of Pf-pep, a 760 Da positively charged peptide inhibitor of the proprotein convertase PACE4. Competitive binding measurements revealed negligible binding of Pf-pep to sites within cartilage. Uptake of Pf-pep depended on glycosaminoglycan charge density, and was consistent with predictions of Donnan equilibrium given the known charge of Pf-pep. In separate transport experiments, the diffusivity of Pf-pep in cartilage was measured to be approximately 1 x 10(-6) cm(2)/s, close to other similarly-sized non-binding solutes. These results suggest that small positively charged therapeutics will have a higher concentration within cartilage than in the surrounding synovial fluid, a desired property for local delivery; however, such therapeutics may rapidly diffuse out of cartilage unless there is additional specific binding to intra-tissue substrates that can maintain enhanced intra-tissue concentration for local delivery.
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Affiliation(s)
- Sangwon Byun
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Abstract
This review summarizes the major developments in animal models of arthritis in the past decade. It focuses on novel transgenic models, addresses the involvement of cytokines and discusses novel findings in cartilage and bone erosion. It is clear that interest has been raised in the direct arthritogenic role of autoantibodies, apart from T cell involvement, and their interaction with cells through Fcgamma receptors. In addition, a role for IL-6 and IL-17 and Th17 cells seems apparent in most T cell-driven arthritis models, with environmental triggering through Toll-like receptors contributing to this process. Further insights into enzymes involved in cartilage proteoglycan loss in arthritis, as well as mediators regulating bone erosion and bone apposition, have been gained.
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Affiliation(s)
- Wim B van den Berg
- Rheumatology Research and Advanced Therapeutics, Radboud University Nijmegen Medical Center, 6525 GA Nijmegen, The Netherlands.
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Optical imaging of mouse articular cartilage using the glycosaminoglycans binding property of fluorescent-labeled octaarginine. Osteoarthritis Cartilage 2009; 17:1209-18. [PMID: 19332175 DOI: 10.1016/j.joca.2009.03.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Revised: 02/22/2009] [Accepted: 03/13/2009] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The aim of the current study was to examine the cartilage-specific binding property of polyarginine peptides (R4, 8, 12, and 16) and specifically to test octaarginine peptides for the optical imaging of articular cartilage in experimentally induced arthritis in mice. METHODS Four rhodamine-labeled polyarginine peptides each with a different-length arginine chain (R4, 8, 12, or 16) were injected into the knee joints of C57BL/6J mice (n=20). The joints were excised 1h later and the fluorescent signal intensity in cartilage cryosections was compared for the four peptides. To examine the substrate of R8 in cartilage, femoral condyles obtained from another set of mice were treated with chondroitinase ABC (Ch'ase ABC), keratanase or heparitinase then immersed in R8-rhodamine. Fluorescent signals were examined by fluorescent microscopy. Next, R8-rhodamine was injected into the right knee joints of three control and three collagen antibody-induced arthritis (CAIA) mice, and fluorescent intensity in normal and degenerative cartilage was semi-quantitatively analysed on the histological sections using image software. Finally, femoral condyles from normal mice (n=2) and CAIA mice (n=2) were immersed in R8-rhodamine and calcein, then imaged using optical projection tomography (OPT). RESULTS Fluorescent signals were specifically detected in the cartilage pericellular matrix from the surface to the tide mark but were completely absent in the calcified layer or bone marrow. The number of arginine residues significantly influenced peptide accumulation in articular cartilage, with R8 accumulating the most. The fluorescent signal in the femoral condylar cartilage diminished when it was treated with Ch'ase ABC. R8 accumulation was significantly decreased in the degenerative cartilage of CAIA mice, and this was demonstrated both histologically and in three-dimensional (3D)-reconstruction image by OPT. CONCLUSION R8 may be a useful new experimental probe for optical imaging of normal and arthritic articular cartilage.
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Liu J, Teng L, Liu C, Hu L, Wang Y, Liu H, Wang F. Augmented inhibitory effect of superoxide dismutase on superoxide anion release from macrophages by chemical modification with polysaccharide and attenuation effects on radiation-induced inflammatory cytokine expression in vitro. J Drug Target 2009; 17:216-24. [DOI: 10.1080/10611860802669249] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Monach PA, Verschoor A, Jacobs JP, Carroll MC, Wagers AJ, Benoist C, Mathis D. Circulating C3 is necessary and sufficient for induction of autoantibody-mediated arthritis in a mouse model. ACTA ACUST UNITED AC 2007; 56:2968-74. [PMID: 17763447 PMCID: PMC2559465 DOI: 10.1002/art.22859] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Objective For the inflammation characteristic of rheumatoid arthritis, the relative contribution of mediators produced locally in the synovium versus those circulating systemically is unknown. Complement factor C3 is made in rheumatoid synovium and has been proposed to be a crucial driver of inflammation. The aim of this study was to test, in a mouse model of rheumatoid arthritis, whether C3 synthesized within the synovium is important in promoting inflammation. Methods Radiation bone marrow chimeras between normal and C3−/− mice were constructed in order to generate animals that expressed or lacked expression of C3 only in hematopoietic cells. Parabiotic mice were made by surgically linking C3−/− mice to irradiated wild-type mice to obtain animals having C3 only in the circulation. Arthritis was induced by injection of serum from arthritic K/BxN mice. Results In bone marrow chimeras, synthesis of C3 by radioresistant cells was necessary and sufficient to confer susceptibility to serum-transferred arthritis. Parabionts having C3 only in the circulation remained sensitive to arthritis induction, and the cartilage of these arthritic mice contained deposits of C3. Conclusion In a mouse model in which the alternative pathway of complement activation is critical to the induction of arthritis by autoantibodies, circulating C3 was necessary and sufficient for arthritis induction.
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Affiliation(s)
- Paul A Monach
- Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts, USA
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Ma SF, Nishikawa M, Katsumi H, Yamashita F, Hashida M. Liver targeting of catalase by cationization for prevention of acute liver failure in mice. J Control Release 2006; 110:273-282. [PMID: 16316705 DOI: 10.1016/j.jconrel.2005.10.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2005] [Revised: 10/06/2005] [Accepted: 10/24/2005] [Indexed: 10/25/2022]
Abstract
To achieve hepatic delivery of CAT for the prevention of CCl4-induced acute liver failure in mice, two types of cationized CAT derivatives, HMD- and ED-conjugated CAT, were developed. Slight structural changes occurred during cationization and the number of increased free amino groups was 3.1 in HMD-CAT and 13.6 in ED-CAT. 111In-cationized CAT derivatives showed an increased binding to HepG2 cells, and were rapidly taken up by the liver. H2O2-induced cytotoxicity in HepG2 cells was significantly prevented by preincubation of the cells with cationized CAT derivatives. A bolus intravenous injection of the cationized CAT derivatives reduced the hepatotoxicity induced by CCl4 in mice. The ED-CAT, which showed more rapid and greater binding to the liver than the HMD-CAT, exhibited more beneficial effects as far as all the parameters examined (serum GOT, GPT, LDH and hepatic GSH) were concerned, suggesting that a high degree of cationization is effective in delivering CAT to the liver to prevent CCl4-induced hepatotoxicity. These results suggest that cationized CAT derivatives are effective in preventing acute liver failure, and ED-based cationization is a suitable method for developing liver-targetable cationized CAT derivatives, because it provides CAT with a high degree of cationization and a high remaining enzymatic activity.
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Affiliation(s)
- Shen-Feng Ma
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Makiya Nishikawa
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hidemasa Katsumi
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Fumiyoshi Yamashita
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mitsuru Hashida
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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Koenders MI, Kolls JK, Oppers-Walgreen B, van den Bersselaar L, Joosten LAB, Schurr JR, Schwarzenberger P, van den Berg WB, Lubberts E. Interleukin-17 receptor deficiency results in impaired synovial expression of interleukin-1 and matrix metalloproteinases 3, 9, and 13 and prevents cartilage destruction during chronic reactivated streptococcal cell wall-induced arthritis. ACTA ACUST UNITED AC 2005; 52:3239-47. [PMID: 16200598 DOI: 10.1002/art.21342] [Citation(s) in RCA: 157] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To examine the role of interleukin-17 receptor (IL-17R) signaling in cartilage destruction and its interrelationship with synovial IL-1 expression during chronic reactivated streptococcal cell wall (SCW)-induced arthritis. METHODS SCW arthritis was repeatedly induced in wild-type (WT) and IL-17R-deficient (IL-17R-/-) mice. At different time points, joint inflammation was assessed by using calipers to measure joint swelling. On day 42, mice were killed, and knee joints were removed for histologic analysis. Quantitative polymerase chain reaction (PCR) analyses for different proinflammatory mediators and matrix metalloproteinases (MMPs) were performed on inflamed synovium from WT and IL-17R-/- mice after 5 repeated injections of SCW fragments. RESULTS IL-17R signaling did not play a significant role in acute joint swelling induced by a single injection of SCW fragments directly into the joint. However, repeated local injections of SCW fragments into the knee joints of IL-17R-/- mice resulted in fewer infiltrating cells in the joint compared with WT mice. Moreover, histologic analysis on day 42 revealed a significant suppression of the degree of chondrocyte death and an absence of cartilage surface erosion in IL-17R-/- mice. Quantitative PCR analysis revealed impaired synovial expression of IL-1, IL-6, cyclooxygenase 2, stromelysin (MMP-3), gelatinase B (MMP-9), and collagenase 3 (MMP-13) in IL-17R-/- mice. CONCLUSION These data show a critical role of IL-17R signaling in driving the synovial expression of proinflammatory and catabolic mediators, such as IL-1 and different MMPs, during progression from an acute, macrophage-driven joint inflammation to a chronic, cartilage-destructive, T cell-mediated synovitis. Prevention of IL-17R signaling warrants consideration as a therapeutic target in chronic destructive arthritis.
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Lubberts E, Schwarzenberger P, Huang W, Schurr JR, Peschon JJ, van den Berg WB, Kolls JK. Requirement of IL-17 receptor signaling in radiation-resistant cells in the joint for full progression of destructive synovitis. THE JOURNAL OF IMMUNOLOGY 2005; 175:3360-8. [PMID: 16116229 DOI: 10.4049/jimmunol.175.5.3360] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
IL-17 is a proinflammatory cytokine suspected to be involved in inflammatory and autoimmune diseases such as rheumatoid arthritis. In the present study, we report that IL-17R signaling is required in radiation-resistant cells in the joint for full progression of chronic synovitis and bone erosion. Repeated injections of Gram-positive bacterial cell wall fragments (streptococcal cell wall) directly into the knee joint of naive IL-17R-deficient (IL-17R-/-) mice had no effect on the acute phase of arthritis but prevented progression to chronic destructive synovitis as was noted in wild-type (wt) mice. Microarray analysis revealed significant down-regulation of leukocyte-specific chemokines, selectins, cytokines, and collagenase-3 in the synovium of IL-17R-/- mice. Bone marrow (BM) chimeric mice revealed the need for IL-17R expression on radiation-resistant joint cells for destructive inflammation. Chimeric mice of host wt and donor IL-17R-/- BM cells developed destructive synovitis in this chronic reactivated streptococcal cell wall arthritis model similar to wt-->wt chimeras. In contrast, chimeric mice of host IL-17R-/- and donor wt BM cells were protected from chronic destructive arthritis similar as IL-17R-/- -->IL-17R-/- chimeras. These data strongly indicate that IL-17R signaling in radiation-resistant cells in the joint is required for turning an acute macrophage-mediated inflammation into a chronic destructive synovitis.
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Affiliation(s)
- Erik Lubberts
- Department of Medicine, Gene Therapy Program, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA.
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20
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Devesa I, Ferrándiz ML, Terencio MC, Joosten LAB, van den Berg WB, Alcaraz MJ. Influence of heme oxygenase 1 modulation on the progression of murine collagen-induced arthritis. ACTA ACUST UNITED AC 2005; 52:3230-8. [PMID: 16200597 DOI: 10.1002/art.21356] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Heme oxygenase 1 (HO-1) can be induced by inflammatory mediators as an adaptive response. The objective of the present study was to determine the consequences of HO-1 modulation in the murine collagen-induced arthritis (CIA) model. METHODS DBA/1J mice were treated with an inhibitor of HO-1, tin protoporphyrin IX (SnPP), or with an inducer of HO-1, cobalt protoporphyrin IX (CoPP), from day 22 to day 29 after CIA induction. The clinical evolution of disease was monitored visually. At the end of the experiment, joints were examined for histopathologic changes. Cytokine levels in paws were measured by enzyme-linked immunosorbent assay. Levels of HO-1, cyclooxygenase 2 (COX-2), and prostaglandin E2 (PGE2) were determined. Effects of treatments on the early phase of disease and after prophylactic administration were also assessed. RESULTS CoPP strongly induced HO-1, resulting in the inhibition of cartilage erosion accompanied by extensive fibrosis in the joint. Levels of tumor necrosis factor alpha (TNFalpha), interleukin-2 (IL-2), and IL-10 were inhibited by CoPP, whereas levels of vascular endothelial growth factor were increased. Treatment with SnPP significantly reduced the severity of CIA, with inhibition of joint inflammation and cartilage destruction. The levels of PGE2, IL-1beta, and TNFalpha were also significantly reduced by SnPP treatment, which did not modify COX-2 protein expression. SnPP was more effective than CoPP in preventing the development of CIA (prophylactic administration). CONCLUSION HO-1 is induced during CIA. Although overexpression of this protein causes some beneficial effects, strategies aimed at HO-1 overexpression cannot slow the progression of the chronic inflammatory disease, whereas treatment with SnPP, which inhibits HO-1, exerts prophylactic and therapeutic effects.
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Kamradt T, Schubert D. The role and clinical implications of G6PI in experimental models of rheumatoid arthritis. Arthritis Res Ther 2004; 7:20-8. [PMID: 15642150 PMCID: PMC1064898 DOI: 10.1186/ar1476] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The antigens that trigger the pathogenic immune response in rheumatoid arthritis (RA) remain unknown. Until recently it was assumed that either viral or microbial antigens, or joint-specific antigens were the target of arthritogenic T and B lymphocytes in RA. Consequently, murine models of arthritis are induced by immunization with either joint-specific antigens such as type II collagen or microbial products such as streptococcal cell wall. In the K/B×N T-cell receptor transgenic mouse model arthritis is caused by a systemic autoimmune response to the ubiquitously expressed glycolytic enzyme glucose-6-phosphate isomerase (G6PI). The autoreactive transgenic T cells recognize G6PI and provide help for the production of arthritogenic IgG antibodies against G6PI. More recently it was shown that G6PI immunization induces severe symmetrical peripheral polyarthritis in genetically unaltered DBA/I mice. In that model CD4+ T cells are necessary not only for the induction but also for the effector phase of arthritis. Here we review the pathomechanisms that lead from systemic autoreactivity to arthritis in these models, consider the relevance of anti-G6PI immune reactivity for RA, and discuss the insights into the pathogenesis of RA and possibly other autoimmune conditions that can be gained from these models.
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MESH Headings
- Animals
- Antibody Specificity
- Arthritis, Experimental/enzymology
- Arthritis, Experimental/etiology
- Arthritis, Experimental/immunology
- Arthritis, Rheumatoid/immunology
- Autoantibodies/immunology
- Autoantigens/immunology
- Autoimmune Diseases/enzymology
- Autoimmune Diseases/etiology
- Autoimmune Diseases/immunology
- B-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/immunology
- Cell Wall/chemistry
- Cell Wall/immunology
- Collagen Type II/immunology
- Collagen Type II/toxicity
- Complement System Proteins/immunology
- Crosses, Genetic
- Glucose-6-Phosphate Isomerase/immunology
- Histocompatibility Antigens Class II/immunology
- Humans
- Immunization
- Immunization, Passive
- Immunoglobulin G/immunology
- Interleukin-1/physiology
- Mast Cells/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Inbred NOD
- Mice, Transgenic
- Nervous System Autoimmune Disease, Experimental/etiology
- Nervous System Autoimmune Disease, Experimental/immunology
- Neutrophils/immunology
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
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Affiliation(s)
- Thomas Kamradt
- Institut für Immunologie, Klinikum der Friedrich-Schiller Universität Jena, Jena, Germany.
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Schubert D, Maier B, Morawietz L, Krenn V, Kamradt T. Immunization with glucose-6-phosphate isomerase induces T cell-dependent peripheral polyarthritis in genetically unaltered mice. THE JOURNAL OF IMMUNOLOGY 2004; 172:4503-9. [PMID: 15034067 DOI: 10.4049/jimmunol.172.7.4503] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Rheumatoid arthritis is a chronic inflammatory disease primarily affecting the joints. The search for arthritogenic autoantigens that trigger autoimmune responses in rheumatoid arthritis has largely focused on cartilage- or joint-specific Ags. In this study, we show that immunization with the ubiquitously expressed glycolytic enzyme glucose-6-phosphate isomerase (G6PI) induces severe peripheral symmetric polyarthritis in normal mice. In genetically unaltered mice, T cells are indispensable for both the induction and the effector phase of G6PI-induced arthritis. Arthritis is cured by depletion of CD4(+) cells. In contrast, Abs and FcgammaR(+) effector cells are necessary but not sufficient for G6PI-induced arthritis in genetically unaltered mice. Thus, the complex pathogenesis of G6PI-induced arthritis in normal mice differs strongly from the spontaneously occurring arthritis in the transgenic K/B x N model where Abs against G6PI alone suffice to induce the disease. G6PI-induced arthritis demonstrates for the first time the induction of organ-specific disease by systemic autoimmunity in genetically unaltered mice. Both the induction and effector phase of arthritis induced by a systemic autoimmune response can be dissected and preventive and therapeutic strategies evaluated in this model.
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MESH Headings
- Animals
- Antibodies, Blocking/administration & dosage
- Arthritis, Experimental/enzymology
- Arthritis, Experimental/genetics
- Arthritis, Experimental/immunology
- Arthritis, Experimental/therapy
- Autoantibodies/biosynthesis
- Autoantibodies/physiology
- Autoantigens/administration & dosage
- Autoantigens/immunology
- CD4 Antigens/biosynthesis
- CD4 Antigens/immunology
- Genetic Predisposition to Disease
- Glucose-6-Phosphate Isomerase/administration & dosage
- Glucose-6-Phosphate Isomerase/immunology
- Humans
- Immunity, Cellular/genetics
- Immunity, Innate/genetics
- Immunization/methods
- Injections, Intraperitoneal
- Injections, Subcutaneous
- Lymphocyte Depletion
- Mice
- Mice, Inbred AKR
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Knockout
- T-Lymphocyte Subsets/immunology
- Tumor Necrosis Factor-alpha/physiology
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Affiliation(s)
- David Schubert
- Deutsches Rheumaforschungszentrum Berlin, Berlin, Germany
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23
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Lubberts E, Koenders MI, Oppers-Walgreen B, van den Bersselaar L, Coenen-de Roo CJJ, Joosten LAB, van den Berg WB. Treatment with a neutralizing anti-murine interleukin-17 antibody after the onset of collagen-induced arthritis reduces joint inflammation, cartilage destruction, and bone erosion. ACTA ACUST UNITED AC 2004; 50:650-9. [PMID: 14872510 DOI: 10.1002/art.20001] [Citation(s) in RCA: 565] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE Interleukin-17 (IL-17) is a proinflammatory cytokine that is expressed in the synovium of rheumatoid arthritis (RA) patients. This T cell cytokine is implicated in the initiation phase of arthritis. However, the role of IL-17 during the effector phase of arthritis has still not been identified; this was the objective of the present study. METHODS Mice with collagen-induced arthritis (CIA) were treated with polyclonal rabbit anti-murine IL-17 (anti-IL-17) antibody-positive serum or normal rabbit serum after the first signs of arthritis. In addition, during a later stage of CIA mice were selected and treated with anti-IL-17 antibody or control serum. Arthritis was monitored visually, and joint pathology was examined radiologically and histologically. Systemic IL-6 levels were measured by enzyme-linked immunosorbent assay, and local synovial IL-1 and receptor activator of NF-kappaB ligand (RANKL) expression was analyzed using specific immunohistochemistry. RESULTS Treatment with a neutralizing anti-IL-17 antibody after the onset of CIA significantly reduced the severity of CIA. Radiographic analysis revealed marked suppression of joint damage in the knee and ankle joints. Histologic analysis confirmed the suppression of joint inflammation and showed prevention of cartilage and bone destruction after anti-IL-17 antibody therapy. Systemic IL-6 levels were significantly reduced after anti-IL-17 antibody treatment. Moreover, fewer IL-1beta-positive and RANKL-positive cells were detected in the synovium after treatment with neutralizing IL-17. Interestingly, initiation of anti-IL-17 antibody therapy during a later stage of CIA, using mice with higher clinical arthritis scores, still significantly slowed the progression of the disease. CONCLUSION IL-17 plays a role in early stages of arthritis, but also later during disease progression. Systemic IL-6 was reduced and fewer synovial IL-1-positive and RANKL-positive cells were detected after neutralizing endogenous IL-17 treatment, suggesting both IL-1-dependent and IL-1-independent mechanisms of action. Our data strongly indicate that IL-17 neutralization could provide an additional therapeutic strategy for RA, particularly in situations in which elevated IL-17 may attenuate the response to anti-tumor necrosis factor/anti-IL-1 therapy.
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Affiliation(s)
- Erik Lubberts
- University Medical Center Nijmegen, Nijmegen, The Netherlands
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24
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Monach PA, Benoist C, Mathis D. The Role of Antibodies in Mouse Models of Rheumatoid Arthritis, and Relevance to Human Disease. Adv Immunol 2004; 82:217-48. [PMID: 14975258 DOI: 10.1016/s0065-2776(04)82005-4] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Paul A Monach
- Section of Immunology and Immunogenetics, Joslin Diabetes Center, and Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA
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25
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Batsford S, Dunn J, Mihatsch M. Outer surface lipoproteins ofBorrelia burgdorferi vary in their ability to induce experimental joint injury. ACTA ACUST UNITED AC 2004; 50:2360-9. [PMID: 15248237 DOI: 10.1002/art.20337] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To examine the ability of bacterial lipoproteins from the spirochete Borrelia burgdorferi to cause in vivo tissue injury (arthritis). METHODS Outer surface proteins (OSPs) from B burgdorferi were used in a rat model of antigen-induced allergic arthritis. Intraarticular challenge with recombinant OspA, OspB, and OspC in nonlipidated (peptide) and lipidated forms was performed in the left knee joint; the contralateral joint received buffer as control. Inflammation was monitored by technetium scintigraphy and histology. RESULTS Nonlipidated (peptide) OspA, OspB, and OspC did not induce arthritis; the only exception was polymerized OspA, which was tested in preimmunized rats. Lipidated OspA from 2 different strains and lipidated OspC induced severe arthritis, whereas lipidated OspB failed to induce injury. A synthetic analog of the OSP lipid modification, lipopeptide Pam(3)Cys-Ser-Lys(4)-OH, either alone or coupled to bovine serum albumin, also failed to induce injury. Injury did not develop in control groups that were given the appropriate buffers or lipopolysaccharide. This showed that lipidated borrelial OSPs can be potent arthritogens but vary greatly with respect to their injury-inducing potential. The possession of a lipid modification is essential but is not sufficient to render an OSP arthritogenic. CONCLUSION This is the first study to demonstrate that individual lipoproteins from B burgdorferi can induce experimental joint injury in vivo. These results may help elucidate the pathogenesis of Lyme arthritis and, above all, underline the importance of bacterial lipoproteins as major virulence factors.
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26
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Lubberts E, van den Bersselaar L, Oppers-Walgreen B, Schwarzenberger P, Coenen-de Roo CJJ, Kolls JK, Joosten LAB, van den Berg WB. IL-17 promotes bone erosion in murine collagen-induced arthritis through loss of the receptor activator of NF-kappa B ligand/osteoprotegerin balance. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2003; 170:2655-62. [PMID: 12594294 DOI: 10.4049/jimmunol.170.5.2655] [Citation(s) in RCA: 247] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-17 is a T cell-derived proinflammatory cytokine in experimental arthritis and is a stimulator of osteoclastogenesis in vitro. In this study, we report the effects of IL-17 overexpression (AdIL-17) in the knee joint of type II collagen-immunized mice on bone erosion and synovial receptor activator of NF-kappa B ligand (RANKL)/receptor activator of NF-kappa B/osteoprotegerin (OPG) expression. Local IL-17 promoted osteoclastic bone destruction, which was accompanied with marked tartrate-resistant acid phosphatase activity at sites of bone erosion in cortical, subchondral, and trabecular bone. Accelerated expression of RANKL and its receptor, receptor activator of NF-kappa B, was found in the synovial infiltrate and at sites of focal bone erosion, using specific immunohistochemistry. Interestingly, AdIL-17 not only enhanced RANKL expression but also strongly up-regulated the RANKL/OPG ratio in the synovium. Comparison of arthritic mice from the AdIL-17 collagen-induced arthritis group with full-blown collagen-arthritic mice having similar clinical scores for joint inflammation revealed lower RANKL/OPG ratio and tartrate-resistant acid phosphatase activity in the latter group. Interestingly, systemic OPG treatment prevented joint damage induced by local AdIL-17 gene transfer in type II collagen-immunized mice. These findings suggest T cell IL-17 to be an important inducer of RANKL expression leading to loss of the RANKL/OPG balance, stimulating osteoclastogenesis and bone erosion in arthritis.
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MESH Headings
- Adenoviruses, Human/genetics
- Adenoviruses, Human/immunology
- Animals
- Arthritis, Experimental/immunology
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Arthritis, Experimental/prevention & control
- Bone and Bones/immunology
- Bone and Bones/metabolism
- Bone and Bones/pathology
- Carrier Proteins/biosynthesis
- Carrier Proteins/metabolism
- Cattle
- Collagen/immunology
- Enzyme-Linked Immunosorbent Assay/statistics & numerical data
- Gene Expression Regulation/immunology
- Gene Transfer Techniques
- Genetic Vectors
- Glycoproteins/biosynthesis
- Glycoproteins/metabolism
- Glycoproteins/therapeutic use
- Humans
- Injections, Intraperitoneal
- Interleukin-17/antagonists & inhibitors
- Interleukin-17/biosynthesis
- Interleukin-17/genetics
- Interleukin-17/physiology
- Ligands
- Male
- Membrane Glycoproteins/biosynthesis
- Membrane Glycoproteins/metabolism
- Mice
- Mice, Inbred DBA
- Osteoclasts/immunology
- Osteoclasts/metabolism
- Osteoclasts/pathology
- Osteoprotegerin
- RANK Ligand
- Receptor Activator of Nuclear Factor-kappa B
- Receptors, Cytoplasmic and Nuclear/biosynthesis
- Receptors, Cytoplasmic and Nuclear/metabolism
- Receptors, Cytoplasmic and Nuclear/therapeutic use
- Receptors, Tumor Necrosis Factor
- Solubility
- Synovial Membrane/immunology
- Synovial Membrane/metabolism
- Synovial Membrane/pathology
- Up-Regulation/genetics
- Up-Regulation/immunology
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Affiliation(s)
- Erik Lubberts
- Rheumatology and Advanced Therapeutics, University Medical Center Nijmegen, Nijmegen, The Netherlands.
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27
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Lubberts E, Oppers-Walgreen B, Pettit AR, Van Den Bersselaar L, Joosten LAB, Goldring SR, Gravallese EM, Van Den Berg WB. Increase in expression of receptor activator of nuclear factor kappaB at sites of bone erosion correlates with progression of inflammation in evolving collagen-induced arthritis. ARTHRITIS AND RHEUMATISM 2002; 46:3055-64. [PMID: 12428250 DOI: 10.1002/art.10607] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE The receptor activator of nuclear factor kappaB (RANK)/RANK ligand (RANKL) pathway is critical in osteoclastogenesis and bone resorption and has been implicated in the process of focal bone erosion in arthritis. This study was undertaken to identify in vivo the hitherto-unknown origin and localization of RANK-expressing osteoclast precursor cells at sites of bone erosion in arthritis. METHODS DBA-1 mice were immunized with bovine type II collagen/Freund's complete adjuvant and were given an intraperitoneal booster injection of type II collagen on day 21. Arthritis was monitored visually, and joint pathology was examined histologically. RANK and RANKL expression were analyzed using specific immunohistochemistry, and tartrate-resistant acid phosphatase (TRAP) staining was performed. In addition, TRAP and cathepsin K messenger RNA expression were analyzed by in situ hybridization. RESULTS A marked increase in the number of cells expressing RANK correlated with the progression of synovial inflammation and clinical disease severity in evolving collagen-induced arthritis (CIA). Interestingly, RANK expression demonstrated a gradient pattern with increased numbers of RANK-positive cells within the synovial infiltrate in areas closer to periosteum and cortical bone. Cells expressing RANK included cells in synovial tissue, bone lining cells on the surface of trabecular bone at sites of erosion, and cells in periosteal areas adjacent to synovial inflammation. In areas where RANK-positive cells were abundant, TRAP-positive, multinucleated osteoclast-like cells were also present at sites of focal bone erosion, suggesting differentiation of synovially derived RANK-positive osteoclast precursor cells into osteoclasts. In addition, TRAP- and cathepsin K-double-positive osteoclast-like cells were detected on the synovial side of cortical bone at sites of early and advanced cortical bone erosion. Sites of RANK expression also correlated well with sites of RANKL expression, and there was a close correlation of the temporal expression of the receptor-ligand pair. CONCLUSION Cells expressing RANK increased in abundance with the progression of arthritis in evolving CIA, and sites of RANK-expressing cells correlated with sites of TRAP-positive, multinucleated osteoclast-like cells as well as with sites of RANKL expression. These data support the hypothesis that the RANK/RANKL pathway plays an important role in the process of bone erosion in CIA.
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Affiliation(s)
- Erik Lubberts
- University Medical Center Nijmegen, Nijmegen, The Netherlands.
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Bakker AC, van de Loo FAJ, Joosten LAB, Arntz OJ, Varley AW, Munford RS, van den Berg WB. C3-Tat/HIV-regulated intraarticular human interleukin-1 receptor antagonist gene therapy results in efficient inhibition of collagen-induced arthritis superior to cytomegalovirus-regulated expression of the same transgene. ARTHRITIS AND RHEUMATISM 2002; 46:1661-70. [PMID: 12115199 DOI: 10.1002/art.10481] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To achieve disease-inducible expression of recombinant antiinflammatory proteins in order to allow autoregulation of drug dose by natural homeostatic mechanisms. METHODS We compared the inducible 2-component expression system (C3-human immunodeficiency virus/transactivator of transcription [C3-Tat/HIV]) with the constitutive cytomegalovirus (CMV) promoter in the polyarticular collagen-induced arthritis (CIA) model in mice. DBA/1 mice were immunized with bovine type II collagen and were given boosters on day 21. On day 22, mice were injected intraarticularly with the adenoviral vectors AdCMVLuc, AdCMVhIL-1Ra, AdC3-Tat/HIV-Luc, or AdC3-Tat/HIV-hIL-1Ra. The injected knee joints and hind paws were then scored for signs of arthritis, and knee joint histology was compared. RESULTS The CMV-driven interleukin-1 receptor antagonist (IL-1Ra) expression resulted in a high constitutive expression and amelioration of CIA. C3-Tat/HIV-driven IL-1Ra expression could be detected only on days 24, 29, and 35. Fourteen days after injection of the vectors, CIA was significantly better inhibited by the C3-Tat/HIV-driven IL-1Ra expression compared with the CMV-driven IL-1Ra expression. Moreover, prevention of CIA in the knee joints also prevented CIA in the untreated hind paws. CONCLUSION Our data demonstrate for the first time the feasibility of an inducible expression system for local production of IL-1Ra for treatment of arthritis in the CIA model.
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Affiliation(s)
- A C Bakker
- Department of Rheumatology, University Medical Center Nijmegen, Geert Grooteplein 26-28, 6500 HB Nijmegen, The Netherlands
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Bakker AC, Van de Loo FA, Joosten LA, Bennink MB, Arntz OJ, Dmitriev IP, Kashentsera EA, Curiel DT, van den Berg WB. A tropism-modified adenoviral vector increased the effectiveness of gene therapy for arthritis. Gene Ther 2001; 8:1785-93. [PMID: 11803398 DOI: 10.1038/sj.gt.3301612] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2001] [Accepted: 10/29/2001] [Indexed: 11/09/2022]
Abstract
Adenoviral vectors (AdV) are used for anti-inflammatory cytokine therapy in experimental arthritis. Cell entry of AdV is dependent on the initial recognition of the coxsackie-adenovirus receptor (CAR) on cells. Recently, an Arg-Gly-Asp (RGD) motif was introduced in the HI loop of the fiber knob, this enables the adenovirus to bypass CAR and mediate cell entry via RGD binding integrins. In this study, we explored the transduction efficiency of the RGD-modified adenovirus in synovium and compared the RGD-modified with the conventional adenoviral vector for their effectiveness to modulate the murine collagen-induced arthritis (CIA) model when used to overexpress mIL-1Ra in the knee joint. Twenty-four hours after intra-articular injection of 10(7) fluorescent forming units (ffu) virus, luciferase (luc) activity in Ad5LucRGD-injected joints was up to 38 times higher than in AdCMVLuc-injected joints, and in arthritic joints the transduction efficiency was up to 69 times higher for the Ad5LucRGD viruses. Transduction of the synovial lining by the RGD-modified adenovirus containing the mIL-1Ra transgene, markedly improved the inhibition of CIA compared with the conventional virus in both a prophylactic and therapeutic treatment protocol. These results show that targeting integrins with the RGD-modified AdV improved the outcome of gene therapy for arthritis.
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Affiliation(s)
- A C Bakker
- University Hospital Nijmegen, Nijmegen, The Netherlands
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30
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Lubberts E, Joosten LA, Oppers B, van den Bersselaar L, Coenen-de Roo CJ, Kolls JK, Schwarzenberger P, van de Loo FA, van den Berg WB. IL-1-independent role of IL-17 in synovial inflammation and joint destruction during collagen-induced arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:1004-13. [PMID: 11441109 DOI: 10.4049/jimmunol.167.2.1004] [Citation(s) in RCA: 295] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
T cell IL-17 displays proinflammatory properties and is expressed in the synovium of patients with rheumatoid arthritis. Its contribution to the arthritic process has not been identified. Here, we show that blocking of endogenous IL-17 in the autoimmune collagen-induced arthritis model results in suppression of arthritis. Also, joint damage was significantly reduced. In contrast, overexpression of IL-17 enhanced collagen arthritis. Moreover, adenoviral IL-17 injected in the knee joint of type II collagen-immunized mice accelerated the onset and aggravated the synovial inflammation at the site. Radiographic and histologic analysis showed markedly increased joint destruction. Elevated levels of IL-1beta protein were found in synovial tissue. Intriguingly, blocking of IL-1alphabeta with neutralizing Abs had no effect on the IL-17-induced inflammation and joint damage in the knee joint, implying an IL-1 independent pathway. This direct potency of IL-17 was underscored in the unabated IL-17-induced exaggeration of bacterial cell wall-induced arthritis in IL-1beta(-/-) mice. In conclusion, this data shows that IL-17 contributes to joint destruction and identifies an IL-1-independent role of IL-17. These findings suggest IL-17 to be a novel target for the treatment of destructive arthritis and may have implications for tissue destruction in other autoimmune diseases.
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MESH Headings
- Adenoviridae/genetics
- Adenoviridae/immunology
- Animals
- Arthritis, Experimental/genetics
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- Arthritis, Experimental/prevention & control
- Arthritis, Infectious/genetics
- Arthritis, Infectious/immunology
- Arthritis, Infectious/pathology
- Disease Models, Animal
- Disease Progression
- Gene Transfer Techniques
- Genetic Vectors/administration & dosage
- Genetic Vectors/immunology
- Hindlimb
- Injections, Intra-Articular
- Injections, Intravenous
- Interleukin-1/deficiency
- Interleukin-1/genetics
- Interleukin-1/metabolism
- Interleukin-1/physiology
- Interleukin-17/antagonists & inhibitors
- Interleukin-17/biosynthesis
- Interleukin-17/genetics
- Interleukin-17/physiology
- Male
- Mice
- Mice, Inbred DBA
- Mice, Knockout
- Neutrophil Infiltration/genetics
- Neutrophil Infiltration/immunology
- Neutrophils/pathology
- Polysaccharides, Bacterial/toxicity
- RNA, Messenger/biosynthesis
- Synovial Membrane/immunology
- Synovial Membrane/metabolism
- Synovial Membrane/pathology
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Affiliation(s)
- E Lubberts
- Rheumatology Research Laboratory, Department of Rheumatology, University Medical Center St. Radboud, Nijmegen, The Netherlands.
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Lubberts E, Joosten LA, Chabaud M, van Den Bersselaar L, Oppers B, Coenen-De Roo CJ, Richards CD, Miossec P, van Den Berg WB. IL-4 gene therapy for collagen arthritis suppresses synovial IL-17 and osteoprotegerin ligand and prevents bone erosion. J Clin Invest 2000; 105:1697-710. [PMID: 10862785 PMCID: PMC378501 DOI: 10.1172/jci7739] [Citation(s) in RCA: 254] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Bone destruction is the most difficult target in the treatment of rheumatoid arthritis (RA). Here, we report that local overexpression of IL-4, introduced by a recombinant human type 5 adenovirus vector (Ad5E1mIL-4) prevents joint damage and bone erosion in the knees of mice with collagen arthritis (CIA). No difference was noted in the course of CIA in the injected knee joints between Ad5E1mIL-4 and the control vector, but radiographic analysis revealed impressive reduction of joint erosion and more compact bone structure in the Ad5E1mIL-4 group. Although severe inflammation persisted in treated mice, Ad5E1mIL-4 prevented bone erosion and diminished tartrate-resistant acid phosphatase (TRAP) activity, indicating that local IL-4 inhibits the formation of osteoclast-like cells. Messenger RNA levels of IL-17, IL-12, and cathepsin K in the synovial tissue were suppressed, as were IL-6 and IL-12 protein production. Osteoprotegerin ligand (OPGL) expression was markedly suppressed by local IL-4, but no loss of OPG expression was noted with Ad5E1mIL-4 treatment. Finally, in in vitro studies, bone samples of patients with arthritis revealed consistent suppression by IL-4 of type I collagen breakdown. IL-4 also enhanced synthesis of type I procollagen, suggesting that it promoted tissue repair. These findings may have significant implications for the prevention of bone erosion in arthritis.
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Affiliation(s)
- E Lubberts
- Rheumatology Research Laboratory, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands.
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32
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Lubberts E, Joosten LA, Van Den Bersselaar L, Helsen MM, Bakker AC, Xing Z, Richards CD, Van Den Berg WB. Intra-articular IL-10 gene transfer regulates the expression of collagen-induced arthritis (CIA) in the knee and ipsilateral paw. Clin Exp Immunol 2000; 120:375-83. [PMID: 10792391 PMCID: PMC1905648 DOI: 10.1046/j.1365-2249.2000.01217.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We studied the effects of local IL-10 application, introduced by a recombinant human type 5 adenovirus vector, in the mouse knee joint during the early phase of CIA. One intra-articular injection with the IL-10-expressing virus (Ad5E1mIL-10) caused substantial over-expression of IL-10 in the mouse knee joint, using virus dosages which did not induce distracting inflammation. High expression of IL-10 was noted for a few days, being maximal at day 1. One intra-articular injection of Ad5E1mIL-10 in the knee joints of collagen type II (CII)-immunized mice, before onset of CIA was noted, reduced the incidence of collagen arthritis in that knee. Of high interest, the protective effect of local IL-10 expression by Ad5E1mIL-10 was not restricted to the knee joint alone. The arthritis incidence in the ipsilateral paw was highly suppressed. In contrast, local IL-10 over-expression was not effective when treatment was started after onset of CIA. Further analysis in the acute streptococcal cell wall-induced arthritis model revealed that local IL-10 over-expression markedly suppressed the production of tumour necrosis factor-alpha (TNF-alpha) and IL-1alpha, but had no significant effect on IL-1beta and IL-12 production in the inflamed synovium. These data indicate that local over-expression of IL-10 in the knee joint of mice regulates the expression of collagen arthritis, probably through down-regulation of TNF-alpha.
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Affiliation(s)
- E Lubberts
- Rheumatology Research Laboratory, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands.
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33
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Willis D, Moore AR, Willoughby DA. Heme oxygenase isoform expression in cellular and antibody-mediated models of acute inflammation in the rat. J Pathol 2000; 190:627-34. [PMID: 10727990 DOI: 10.1002/(sici)1096-9896(200004)190:5<627::aid-path556>3.0.co;2-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Heme oxygenase (HO) is the rate-limiting enzyme in the catabolism of heme to biliverdin, carbon monoxide (CO), and free iron. The enzyme exists as a constitutive isoform (HO-2) and an inducible isoform (HO-1), which is also a stress protein (HSP32). HO-1 has previously been shown to be associated with the resolution phase of a non-immune model of acute inflammation. In addition, elevation of the enzyme was markedly anti-inflammatory. In the present study, these observations have been extended to two pleural models of immune-driven inflammation in the rat, an immediate type III hypersensitivity (Arthus) reaction and a delayed type IV hypersensitivity reaction. Whilst these models have differing inflammatory mechanisms and time courses, they both showed HO activity to be maximal during the resolution phase. This activity was associated with increases in exudate bilirubin (a breakdown product of biliverdin) and increased expression of HO-1. Immunocytochemical analysis of inflammatory cell smears from the two models showed that HO-1 and HO-2 expression was restricted to mononuclear cells in the type IV hypersensitivity reaction, but included the polymorphonuclear cell population in the type III hypersensitivity reaction. Thus, irrespective of the pathogenesis of the lesion, evidence is accumulating to suggest that HO-1 has a universal role in the resolution of inflammation.
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Affiliation(s)
- D Willis
- Department of Experimental Pathology, Division of Pharmacology, St Bartholomew's and the Royal London School of Medicine and Dentistry, Charterhouse Square, London EC1M 6BQ, UK.
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Blom AB, van Lent PL, van Vuuren H, Holthuysen AE, Jacobs C, van de Putte LB, van de Winkel JG, van den Berg WB. Fc gamma R expression on macrophages is related to severity and chronicity of synovial inflammation and cartilage destruction during experimental immune-complex-mediated arthritis (ICA). ARTHRITIS RESEARCH 2000; 2:489-503. [PMID: 11056679 PMCID: PMC17821 DOI: 10.1186/ar131] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2000] [Revised: 07/13/2000] [Accepted: 07/31/2000] [Indexed: 11/10/2022]
Abstract
STATEMENT OF FINDINGS: We investigated the role of Fc gamma receptors (Fc gamma Rs) on synovial macrophages in immune-complex-mediated arthritis (ICA). ICA elicited in knee joints of C57BL/6 mice caused a short-lasting, florid inflammation and reversible loss of proteoglycans (PGs), moderate chondrocyte death, and minor erosion of the cartilage. In contrast, when ICA was induced in knee joints of Fc receptor (FcR) gamma-chain(-/-) C57BL/6 mice, which lack functional Fc gamma RI and RIII, inflammation and cartilage destruction were prevented. When ICA was elicited in DBA/1 mice, a very severe, chronic inflammation was observed, and significantly more chondrocyte death and cartilage erosion than in arthritic C57BL/6 mice. The synovial lining and peritoneal macrophages of naïve DBA/1 mice expressed a significantly higher level of Fc gamma Rs than was seen in C57BL/6 mice. Moreover, elevated and prolonged expression of IL-1 was found after stimulation of these cells with immune complexes. Zymosan or streptococcal cell walls caused comparable inflammation and only mild cartilage destruction in all strains. We conclude that Fc gamma R expression on synovial macrophages may be related to the severity of synovial inflammation and cartilage destruction during ICA.
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Affiliation(s)
- A B Blom
- Department of Rheumatology, University Hospital St Radboud, Nijmegen.
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35
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Lubberts E, Joosten LAB, van den Bersselaar L, Helsen MMA, Bakker AC, van Meurs JBJ, Graham FL, Richards CD, van den Berg WB. Adenoviral Vector-Mediated Overexpression of IL-4 in the Knee Joint of Mice with Collagen-Induced Arthritis Prevents Cartilage Destruction. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.163.8.4546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Rheumatoid arthritis is a chronic inflammatory joint disease, leading to cartilage and bone destruction. In this study, we investigated the effects of local IL-4 application, introduced by a recombinant human type 5 adenovirus vector, in the knee joint of mice with collagen-induced arthritis. One intraarticular injection with an IL-4-expressing virus caused overexpression of IL-4 in the mouse knee joint. Enhanced onset and aggravation of the synovial inflammation were found in the IL-4 group. However, despite ongoing inflammation, histologic analysis showed impressive prevention of chondrocyte death and cartilage erosion. In line with this, chondrocyte proteoglycan synthesis was enhanced in the articular cartilage. This was quantified with ex vivo 35S-sulfate incorporation in patellar cartilage and confirmed by autoradiography on whole knee joint sections. Reduction of cartilage erosion was further substantiated by lack of expression of the stromelysin-dependent cartilage proteoglycan breakdown neoepitope VDIPEN in the Ad5E1 mIL-4-treated knee joint. Reduced metalloproteinase activity was also supported by markedly diminished mRNA expression of stromelysin-3 in the synovial tissue. Histologic analysis revealed marked reduction of polymorphonuclear cells in the synovial joint space in the IL-4-treated joints. This was confirmed by immunolocalization studies on knee joint sections using NIMP-R14 staining and diminished mRNA expression of macrophage-inflammatory protein-2 in the synovium tissue. mRNA levels of TNF-α and IL-1β were suppressed as well, and IL-1β and nitric oxide production by arthritic synovial tissue were strongly reduced. Our data show an impressive cartilage-protective effect of local IL-4 and underline the feasibility of local gene therapy with this cytokine in arthritis.
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Affiliation(s)
- Erik Lubberts
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Leo A. B. Joosten
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Liduine van den Bersselaar
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Monique M. A. Helsen
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Andrew C. Bakker
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Joyce B. J. van Meurs
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
| | - Frank L. Graham
- †Department of Pathology, McMaster University, Hamilton, Ontario, Canada
| | - Carl D. Richards
- †Department of Pathology, McMaster University, Hamilton, Ontario, Canada
| | - Wim B. van den Berg
- *Rheumatology Research Lab, Department of Rheumatology, University Hospital Nijmegen, Nijmegen, The Netherlands; and
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van Meurs J, van Lent P, Stoop R, Holthuysen A, Singer I, Bayne E, Mudgett J, Poole R, Billinghurst C, van der Kraan P, Buma P, van den Berg W. Cleavage of aggrecan at the Asn341-Phe342 site coincides with the initiation of collagen damage in murine antigen-induced arthritis: a pivotal role for stromelysin 1 in matrix metalloproteinase activity. ARTHRITIS AND RHEUMATISM 1999; 42:2074-84. [PMID: 10524678 DOI: 10.1002/1529-0131(199910)42:10<2074::aid-anr7>3.0.co;2-5] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVE The destruction of articular cartilage during arthritis is due to proteolytic cleavage of the extracellular matrix components. This study investigates the kinetic involvement of metalloproteinases (MMPs) in the degradation of the 2 major cartilage components, aggrecan and type II collagen, during murine antigen-induced arthritis (AIA). In addition, the role of stromelysin 1 (SLN-1) induction of MMP-induced neoepitopes was studied. METHODS VDIPEN neoepitopes in aggrecan and collagenase-induced COL2-3/4C neoepitopes in type II collagen were identified by immunolocalization. Stromelysin 1-deficient knockout (SLN1-KO) mice were used to study SLN-1 involvement. RESULTS In AIA, the VDIPEN epitopes in aggrecan appeared after initial proteoglycan (PG) depletion. The collagenase-induced type II collagen neoepitopes colocalized with VDIPEN epitopes. Remarkably, cartilage from arthritic SLN1-KO mice showed neither the induction of VDIPEN nor collagen cleavage-site neoepitopes during AIA, suggesting that stromelysin is a pivotal mediator in this process. PG depletion, as measured by the loss of Safranin O staining, was similar in SLN1-KO mice and wild-type strains. Furthermore, in vitro induction of VDIPEN epitopes in aggrecan and COL2-3/4C epitopes in type II collagen, on exposure of cartilage to interleukin-1, could not be accomplished in SLN1-KO mice, whereas intense staining was achieved for both epitopes in cartilage of wild-type strains. CONCLUSION This study emphasizes that SLN-1 is essential in the induction of MMP-specific aggrecan and collagen cleavage sites during AIA. It suggests that SLN-1 is not a dominant enzyme in PG breakdown, but that it activates procollagenases and is crucial in the initiation of collagen damage.
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Affiliation(s)
- J van Meurs
- University Hospital Nijmegen, The Netherlands
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37
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Lefkowitz DL, Gelderman MP, Fuhrmann SR, Graham S, Starnes JD, Lefkowitz SS, Bollen A, Moguilevsky N. Neutrophilic myeloperoxidase-macrophage interactions perpetuate chronic inflammation associated with experimental arthritis. Clin Immunol 1999; 91:145-55. [PMID: 10227806 DOI: 10.1006/clim.1999.4696] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rheumatoid arthritis is a systemic disease of unknown etiology. The purpose of this study was to elucidate an unrecognized interaction between neutrophilic myeloperoxidase (MPO) and macrophages (Mphi) which could perpetuate the inflammatory response associated with arthritis. A monoarticular arthritis was induced by intra-articular injection of group A streptococcus cell wall fragments (PG-APS) into the ankle joint of female Lewis rats. After swelling/erythema subsided, joints were reinjected with either recombinant MPO or enzymatically inactive MPO (iMPO). Joint measurements were made daily and arthritis was confirmed by histology. Neither iMPO nor MPO could initiate "clinical" arthritis; however, either form of the enzyme injected after PG-APS induced a dose-dependent increase in erythema and swelling. Mannans, which block the binding of MPO to Mo, ablated clinical symptoms. Also, the presence of tumor necrosis factor alpha was observed only in diseased joints using immunocytochemistry.
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Van Lent PL, Holthuysen AE, Van Rooijen N, Van De Putte LB, Van Den Berg WB. Local removal of phagocytic synovial lining cells by clodronate-liposomes decreases cartilage destruction during collagen type II arthritis. Ann Rheum Dis 1998; 57:408-13. [PMID: 9797567 PMCID: PMC1752671 DOI: 10.1136/ard.57.7.408] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To investigate whether local removal of phagocytic synovial lining cells (SLCs) from the knee joint before onset of collagen type II arthritis has an effect on development of cartilage destruction. METHODS Phagocytic SLCs were selectively depleted by a single injection of clodronate laden liposomes in the knee joint seven days before induction of collagen type II arthritis (CIA). Clodronate laden liposomes were given in one knee joint either alone or in combination with a short-term oral treatment of dexamethasone. Cartilage damage including proteoglycan depletion and chondrocyte death was measured in total knee joints sections stained with safranin-o or haematoxylin. RESULTS Local removal of phagocytic SLCs, seven days before arthritis onset, prevented cell influx for the larger part. Chondrocyte death was significantly decreased in the SLC depleted arthritic joint both at an early (6 days) and late (12 days) time point after CIA induction. However, depletion of proteoglycans from femoral and patellar cartilage layers was not prevented. If the mild acute inflammation caused by a single clodronate laden liposome injection in the left knee joint, was blocked by a short-term (on consecutive days 9, 8, 7, 6, 5 before CIA onset) oral treatment with dexamethasone, cell influx, but also proteoglycan depletion was almost completely blocked. In the contralateral control right knee joint prominent cell influx and severe cartilage damage was observed, indicating that there was no effect of dexamethasone anymore at the onset of CIA. CONCLUSIONS This study shows that removal of phagocytic lining cells before CIA induction, particularly in the presence of a short-term treatment with dexamethasone, decreases cartilage destruction.
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Affiliation(s)
- P L Van Lent
- Department of Rheumatology, University Hospital Nijmegen, the Netherlands
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Hersmann GH, Kriegsmann J, Simon J, Hüttich C, Bräuer R. Expression of cell adhesion molecules and cytokines in murine antigen-induced arthritis. CELL ADHESION AND COMMUNICATION 1998; 6:69-82. [PMID: 9759522 DOI: 10.3109/15419069809069761] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Adhesion molecules and cytokines are important in chronic inflammatory conditions such as rheumatoid arthritis (RA) by virtue of their role in cell activation and emigration. Using immunohistochemical techniques we studied the expression of adhesion molecules and cytokines in cryopreserved sections of murine knee joint in the course of antigen-induced arthritis, an animal model of human RA. Various adhesion molecules and cytokines are expressed in the arthritic joint tissue. LFA-1, Mac-1, CD44, ICAM-1 and P-selectin were strongly expressed in the acute phase and to a lesser degree in the chronic phase of arthritis. VLA-4 and VCAM-1 appeared to be moderately expressed on day 1, L-selectin between days 1 and 3. LFA-1, Mac-1, CD44, alpha 4-integrin, ICAM-1 and the selectins were found expressed on cells of the synovial infiltrate, LFA-1, Mac-1 and ICAM-1 on the synovial lining layer, and VCAM-1 and P-selectin on endothelial cells. Expression of E-selectin could be demonstrated throughout the experiment at a low level in cells of the acute cell infiltrate. Cytokines, especially IL-2, IL-4, IL-6, TNF, and IFN-gamma, were heavily expressed during the acute phase of arthritis in cellular infiltrate. Taken together these data demonstrate that cytokines and their activation of adhesion molecules contribute to cell infiltration and activation during the initial phase of arthritis and to the induction and progression of tissue destruction in arthritic joints. These molecules might be potential targets for novel therapeutic strategies in inflammatory and arthritic disorders.
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Affiliation(s)
- G H Hersmann
- Klinikum der Friedrich-Schiller-Universität, Institut für Pathologie, Jena, Germany
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Gelderman MP, Stuart R, Vigerust D, Fuhrmann S, Lefkowitz DL, Allen RC, Lefkowitz SS, Graham S. Perpetuation of inflammation associated with experimental arthritis: the role of macrophage activation by neutrophilic myeloperoxidase. Mediators Inflamm 1998; 7:381-9. [PMID: 9927230 PMCID: PMC1781873 DOI: 10.1080/09629359890758] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Rheumatoid arthritis (RA) is characterized by an abnormal cellular and cytokine infiltration of inflamed joints. This study addresses a previously unrecognized interaction between neutrophilic-myeloperoxidase (MPO) and macrophages (Mphi) which could explain the perpetuation of inflammation associated with RA. A monoarticular arthritis was induced in female Lewis rats by injection of streptococcal cell wall extracts (PG-APS). After swelling and erythema subsided, joints were re-injected with one of the following: porcine MPO or partially inactivated MPO (iMPO). Injection with either MPO or iMPO induced a 'flare' of experimental RA. Blocking the Mphi-mannose receptor by mannans, ablated exacerbation of disease. These results indicate that MPO or iMPO can play a pivotal role in the perpetuation but not initiation of this RA model.
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Affiliation(s)
- M P Gelderman
- National Institutes of Health, Bethesda, MD 20931, USA
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41
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Joosten LA, Lubberts E, Durez P, Helsen MM, Jacobs MJ, Goldman M, van den Berg WB. Role of interleukin-4 and interleukin-10 in murine collagen-induced arthritis. Protective effect of interleukin-4 and interleukin-10 treatment on cartilage destruction. ARTHRITIS AND RHEUMATISM 1997; 40:249-60. [PMID: 9041936 DOI: 10.1002/art.1780400209] [Citation(s) in RCA: 303] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To examine the role of endogenous interleukin-4 (IL-4) and interleukin-10 (IL-10) and the therapeutic effect of the addition of IL-4 and IL-10 in early and established murine collagen-induced arthritis (CIA). METHODS Murine recombinant IL-4, IL-10, or the combination was given intraperitoneally twice daily from the day of arthritis onset up to 7-10 days of CIA in DBA/1 mice. Anti-IL-4, anti-IL-10, or both antibodies were given intraperitoneally before or after the onset of CIA. The effect of cytokine or anticytokine treatment was monitored visually by macroscopic scoring. Histology and reverse transcription-polymerase chain reaction (RT-PCR) analyses were performed at the end of the treatment period. RESULTS IL-4 alone did not provoke any effect, IL-10 slightly suppressed the arthritis, but a more pronounced amelioration was found with the combination. This cooperative effect was noted after early treatment but also occurred when the start of treatment was delayed until 1 week after onset. Apart from suppression of macroscopic signs of inflammation, combined treatment with IL-4/IL-10 also reduced cellular infiltrates in the synovial tissue and caused pronounced protection against cartilage destruction. Moreover, levels of mRNA for tumor necrosis factor alpha (TNF alpha) and IL-1 were highly suppressed both in the synovial tissue and in the articular cartilage. In contrast, levels of IL-1 receptor antagonist (IL-1Ra) mRNA remained elevated, which suggests that the mechanism of protection may be related to suppressed production of TNF alpha and IL-1, with concomitant up-regulation of the IL-1Ra/IL-1 balance. However, accelerated onset of CIA and increased severity could be achieved with neutralizing anti-IL-10 antibodies. This expression could be further optimized with a combination of anti-IL-4 and anti-IL-10 antibodies, although anti-IL-4 alone was without effect. CONCLUSION Our data are consistent with a dominant role of IL-10 in the natural suppression of arthritis expression, whereas combined treatment with IL-4 and IL-10 appears of potential therapeutic value, not only at the onset, but also in established arthritis.
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Affiliation(s)
- L A Joosten
- University Hospital Nijmegen, The Netherlands
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42
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Henzgen S, Petrow PK, Thoss K, Bräuer R. Degradation of articular cartilage during the progression of antigen-induced arthritis in mice. A scanning and transmission electron microscopic study. EXPERIMENTAL AND TOXICOLOGIC PATHOLOGY : OFFICIAL JOURNAL OF THE GESELLSCHAFT FUR TOXIKOLOGISCHE PATHOLOGIE 1996; 48:255-63. [PMID: 8811292 DOI: 10.1016/s0940-2993(96)80012-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Ultrastructural changes of knee articular cartilage in C57B1/6 mice were studied in the course of antigen-induced arthritis by means of scanning and transmission electron microscopy. First damages of the cartilage surface were seen one hour after arthritis induction. The earliest signs were the loss of the superficial electron-dense layer as well as a progressive loss of proteoglycans in the cartilaginous matrix on the surface. Breaks of collagen fibres were already detected at the first day of arthritis. The chondrocytes of the superficial cartilage layer showed an increase of the intracellular membraneous system in the early phase of arthritis. Thereafter chondrocytes on the surface became more and more necrotic. On the 7th day of arthritis acute alterations of cartilage had developed completely. Many lacunae of chondrocytes were opened and the cartilage surface showed deep structural defects with adhering cells, probably lymphocytes and macrophages. In the following time these destructive processes were demonstrated along with cellular proliferation as a sign of repair attempts in hyaline cartilage.
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Affiliation(s)
- S Henzgen
- Institute of Pathology, Friedrich Schiller University Jena, Germany
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43
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Joosten LA, Helsen MM, van de Loo FA, van den Berg WB. Anticytokine treatment of established type II collagen-induced arthritis in DBA/1 mice. A comparative study using anti-TNF alpha, anti-IL-1 alpha/beta, and IL-1Ra. ARTHRITIS AND RHEUMATISM 1996; 39:797-809. [PMID: 8639177 DOI: 10.1002/art.1780390513] [Citation(s) in RCA: 357] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE To examine the role of tumor necrosis factor alpha (TNF alpha), interleukin-1 alpha (IL-1 alpha), and IL-1 beta in collagen-induced arthritis (CIA), immediately after onset and during the phase of established arthritis. METHODS Male DBA/1 mice with collagen-induced arthritis were treated with antibodies against murine TNF alpha and IL-1 alpha/beta at different time points of the disease. IL-1 receptor antagonist (IL-1Ra) was administered using Alzet osmotic minipumps. The effect of anticytokine treatment was monitored by visual scoring. Histology and cytokine reverse transcription polymerase chain reaction (RT-PCR) analyses were performed at the end of the treatment period. RESULTS Anti-TNF alpha treatment showed efficacy shortly after onset of the disease, but had little effect on fully established CIA. Histologic analysis after early treatment revealed that anti-TNF alpha significantly reduced joint pathology, as determined by infiltration of inflammatory cells and cartilage damage. Anti-IL-1 alpha/beta treatment ameliorated both early and full-blown CIA. This clear suppression of established arthritis was confirmed by administration of high doses of IL-1Ra. Dose-response experiments showed that a continuous supply of 1 mg/day was needed for optimal suppression. Histologic analysis showed markedly reduced cartilage destruction both in the knee and the ankle joints. Autoradiography demonstrated full recovery of chondrocyte synthetic function of articular cartilage. In addition, we found that the IL-1 beta isoform plays a dominant role in established CIA. Profound suppression of CIA was observed with anti-IL-1 beta, although elimination of both IL-1 alpha and IL-1 beta still gave better protection. Analysis of messenger RNA with RT-PCR revealed that IL-1 beta was highly upregulated in synovium and cartilage at late stages of CIA, whereas anti-IL-1 beta treatment markedly reduced IL-1 beta message in the synovium. CONCLUSION The present study identified different TNF alpha/IL-1 dependencies in various stages of CIA and revealed that blocking of TNF alpha does not necessarily eliminate IL-1. Continuous, high doses of IL-1Ra are needed to block CIA.
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Affiliation(s)
- L A Joosten
- University Hospital Nijmegen, The Netherlands
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44
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Thoss K, Henzgen S, Petrow PK, Katenkamp D, Brauer R. Immunomodulation of rat antigen-induced arthritis by leflunomide alone and in combination with cyclosporin A. Inflamm Res 1996; 45:103-7. [PMID: 8907592 DOI: 10.1007/bf02265123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The effects of the new immunomodulating isoxazol derivative leflunomide, in comparison with cyclosporin A, on established antigen-induced arthritis in rats as well as serum antibody levels were determined. When treatment with leflunomide, at concentrations from 2.5 to 10 mg/kg/d, was started on day 3 of arthritis, the acute and chronic phases of arthritis were effectively inhibited. This was demonstrated by decreased joint swelling and reduced histopathological arthritis score at the end of experiment (day 26). Furthermore, the treatment resulted in a significantly reduced level of serum antibodies to the matrix components collagen type I, type II and proteoglycans. Neither leflunomide nor cyclosporin A, at doses of 1 mg/kg/d, had an effect on the severity of arthritis and antibody levels. However, when both drugs were used together, at these non-effective doses, the histopathological score of chronic arthritis was significantly reduced. The results of our experiments demonstrate that leflunomide has a strong suppressive effect on both acute and chronic phases of antigen-induced arthritis and formation of autoantibodies in rats. Furthermore, orally administered doses of leflunomide were as effective as doses of cyclosporin A given intraperitoneally. The combination of sub-effective doses of leflunomide and cyclosporin A resulted in significant inhibition of chronic arthritis.
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Affiliation(s)
- K Thoss
- Institute of Pathology, Friedrich Schiller University, Jena, Germany
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45
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Carpenter TA, Everett JR, Hall LD, Harper GP, Hodgson RJ, James MF. Visualisation of subchondral erosion in rat monoarticular arthritis by magnetic resonance imaging. Skeletal Radiol 1995; 24:341-9. [PMID: 7570154 DOI: 10.1007/bf00197062] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
High-resolution magnetic resonance imaging (MRI) was used to investigate antigen-induced monoarticular arthritis (AIMA) in the rat. In sagittal, spin-echo images of the knee, characteristic parallel bands, in the order dark-light-dark, were consistently observed 5-8 days after arthritis induction; the bands ran concentric with, and just beneath, the femoral and tibial articular surfaces. Concurrent radiology, histology and MRI (chemical shift-selective imaging and contrast enhancement with magnetisation transfer and gadolinium) established that the phenomenon reflected subchondral erosion, not artefact. The outer hypointense band corresponded to calcified cartilage underlying the articular surface. The central hyperintense band reflected inflammatory matrix displacing normal haematopoietic tissue immediately subchondrally; here, trabecular bone had mostly disappeared, but adjacent articular cartilage, although under attack and lacking proteoglycan, appeared structurally normal. The inner hypointense band reflected deeper, truncated trabeculae within inflammatory matrix, layered with pallisading osteoblast-like cells. This study exemplifies the power of MRI for revealing localised joint pathology non-invasively, and shows that rat AIMA shares many pathological features with arthritis in human beings.
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Affiliation(s)
- T A Carpenter
- Herchel Smith Laboratory for Medicinal Chemistry, Cambridge University Forvie Site, UK
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46
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Affiliation(s)
- L B van de Putte
- Department of Rheumatology, University Hospital, Nijmegen, The Netherlands
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47
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van den Berg WB. Articular cartilage: cause or victim in arthritis. Scand J Rheumatol Suppl 1995; 101:31-7. [PMID: 7538227 DOI: 10.3109/03009749509100897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- W B van den Berg
- Department of Rheumatology, University Hospital Nijmegen, The Netherlands
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48
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van Lent PL, Holthuysen AE, van den Bersselaar L, van Rooijen N, van de Putte LB, van den Berg WB. Role of macrophage-like synovial lining cells in localization and expression of experimental arthritis. Scand J Rheumatol Suppl 1995; 101:83-9. [PMID: 7747137 DOI: 10.3109/03009749509100906] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- P L van Lent
- Department of Rheumatology, University Hospital St. Radboud, Nijmegen, The Netherlands
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49
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Hermann E. Enterobacterial antigens with tropism for joint structures and HLA-B27-restricted cytotoxic T-cells in reactive arthritis. Scand J Rheumatol Suppl 1995; 101:203-6. [PMID: 7747127 DOI: 10.3109/03009749509100929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- E Hermann
- First Department of Medicine, University of Mainz, Germany
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50
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Joosten LA, Helsen MM, van den Berg WB. Accelerated onset of collagen-induced arthritis by remote inflammation. Clin Exp Immunol 1994; 97:204-11. [PMID: 8050168 PMCID: PMC1534682 DOI: 10.1111/j.1365-2249.1994.tb06069.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Collagen-induced arthritis (CIA) in DBA-1 lac/J mice often has a low incidence, with gradual disease expression occurring over a broad time span (between days 35 and 70). The exact mechanisms underlying spontaneous expression are still poorly understood, although it is evident that some inflammatory cytokines like IL-1, tumour necrosis factor-alpha (TNF-alpha) and transforming growth factor-beta (TGF-beta) are potent accelerators. We have investigated whether we could trigger collagen type II-driven inflammation by: (i) enhancing anti-collagen type II (CII) antibodies, or (ii) a non-related inflammatory process. Male DBA-1 lac/J mice were immunized with 100 micrograms bovine type II collagen in Freund's complete adjuvant (FCA), resulting in a low disease expression at day 28. Addition of anti-CII antibodies slightly enhanced the expression of CIA. Zymosan (3 mg), given intraperitoneally, induced consistent expression of CIA after 1 week, whereas a retarded onset was noted with higher dosages. Local injection of a low dose of Zymosan (60 micrograms) in the knee joint, clearly potentiated the expression of CIA at that particular site. Higher concentrations not only elicited prolonged CIA expression at the injection site, but also induced marked CIA in the draining ankle joint. In contrast, intra-articular injection of Zymosan in nonimmunized DBAs or methylated bovine serum albumin (mBSA)/FCA-immunized controls only induced transient joint inflammation. The nature of the highly erosive CIA was confirmed histologically, and could easily be discriminated from the reversible changes induced with Zymosan. Our data indicate that latent autoimmune reactions may come to expression at the moment of non-specific inflammation, even at a remote site.
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Affiliation(s)
- L A Joosten
- Department of Rheumatology, University Hospital Nijmegen, The Netherlands
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