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Alsalameh RJ, Casey RC, Mollenhauer J, Kalden JR, Burmester GR, Alsalameh SM. Induction of proliferation and pro-inflammatory cytokine production in rheumatoid arthritis peripheral blood mononuclear cells by a 65 KDa chondrocyte membrane-specific, constitutive target autoantigen (CH65). Int J Rheum Dis 2013; 20:1132-1141. [PMID: 24131486 DOI: 10.1111/1756-185x.12167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To analyze proliferation and pro-inflammatory cytokine production of peripheral blood mononuclear cells (PBMC) from rheumatoid arthritis (RA) patients following stimulation with a purified chondrocyte membrane-associated autoantigen (CH65). METHODS CH65 was highly purified from bovine chondrocyte membranes by solubilization and ion exchange chromatography. PBMC of RA patients (n = 37; 28 seropositive, nine seronegative) and non-arthritic donors (n = 20) were isolated by ficoll centrifugation and used in cell proliferation assays. The levels of interleukin (IL)-1, tumo necrosis factor (TNF) and IL-6 produced after stimulation with CH65 were determined by enzyme-linked immunosorbent assay (ELISA). Statistical analysis was performed using Mann-Whitney U-test and Spearman rank test and the software SPSS 13.0TM (SPSS Inc.; Chicago, IL, USA). RESULTS Peripheral blood mononuclear cells exhibited a strong proliferative response to purified CH65 in approximately 50% of the RA patients (seropositive > seronegative), with a maximum reactivity at 0.15 or 0.30 μg/mL culture medium. In contrast, PBMC from normal donors did not show a proliferative response to CH65 at any dose. The proliferative response in RA patients peaked at days 7-9 and returned to control levels at day 13, indicating an antigen-driven process. CH65-stimulated RA PBMC produced moderate to high amounts of IL-1, TNF and IL-6. This was comparable to the response after exposure to isolated whole chondrocyte membranes or purified collagen type II. CONCLUSION These results demonstrate a significant cellular immune response to CH65 protein in RA patients. Given the high similarity between bovine and human CH65, the results suggest a pathogenetic involvement of this molecule as a cartilage-specific potential target autoantigen in RA.
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Affiliation(s)
- Rayya J Alsalameh
- Institute of Clinical Microbiology and Hospital Hygiene, University Hospital Erlangen, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Rachael C Casey
- Department of Biochemistry, Rush University Medical Center, Chicago, Illinois, USA
| | - Jürgen Mollenhauer
- Department of Biochemistry, Rush University Medical Center, Chicago, Illinois, USA
| | - Joachim R Kalden
- Department of Medicine III, Institute for Clinical Immunology and Rheumatology, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Gerd R Burmester
- Department of Internal Medicine, Rheumatology and Clinical Immunology, Charite Centre for Internal Medicine and Dermatology, Charite-Universitätsmedizin Berlin, Berlin, Germany
| | - Saifeddin M Alsalameh
- Department of Medicine III, Institute for Clinical Immunology and Rheumatology, University of Erlangen-Nuremberg, Erlangen, Germany.,Division of Rheumatology and Immunology, Department of Medicine, Tawam Hospital, Al Ain, Abu Dhabi, UAE
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2
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de Jong H, Lafeber FFP, de Jager W, Haverkamp MH, Kuis W, Bijlsma JWJ, Prakken BJ, Albani S. Pan-DR-binding Hsp60 self epitopes induce an interleukin-10-mediated immune response in rheumatoid arthritis. ACTA ACUST UNITED AC 2009; 60:1966-76. [PMID: 19565483 DOI: 10.1002/art.24656] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Human Hsp60 is expressed in the joints of patients with rheumatoid arthritis (RA) and can elicit a regulatory T cell response in the peripheral blood and synovial fluid. However, Hsp60 can also trigger strong proinflammatory pathways. Thus, to understand the nature of these Hsp60-directed responses in RA, it is necessary to study such responses at the molecular, epitope-specific level. This study was undertaken to characterize the disease specificity and function of pan-DR-binding Hsp60-derived epitopes as possible modulators of autoimmune inflammation in RA. METHODS Lymphocyte proliferation assays (using (3)H-thymidine incorporation and carboxyfluorescein diacetate succinimidyl ester [CFSE] staining) and measurement of cytokine production (using multiplex immunoassay and intracellular staining) were performed after in vitro activation of peripheral blood mononuclear cells from patients with RA, compared with healthy controls. RESULTS A disease (RA)-specific immune recognition, characterized by T cell proliferation as well as increased production of tumor necrosis factor alpha (TNFalpha), interleukin-1beta (IL-1beta), and IL-10, was found for 3 of the 8 selected peptides in patients with RA as compared with healthy controls (P < 0.05). Intracellular cytokine staining and CFSE labeling showed that CD4+ T cells were the subset primarily responsible for both the T cell proliferation and the cytokine production in RA. Interestingly, the human peptides had a remarkably different phenotype, with a 5-10-fold higher IL-10:TNFalpha ratio, compared with that of the microbial peptides. CONCLUSION These results suggest a disease-specific immune-modulatory role of epitope-specific T cells in the inflammatory processes of RA. Therefore, these pan-DR-binding epitopes could be used as a tool to study the autoreactive T cell response in RA and might be suitable candidates for use in immunotherapy.
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Affiliation(s)
- Huib de Jong
- University Medical Centre Utrecht, Utrecht, The Netherlands
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3
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Kidd BA, Ho PP, Sharpe O, Zhao X, Tomooka BH, Kanter JL, Steinman L, Robinson WH. Epitope spreading to citrullinated antigens in mouse models of autoimmune arthritis and demyelination. Arthritis Res Ther 2008; 10:R119. [PMID: 18826638 PMCID: PMC2592807 DOI: 10.1186/ar2523] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 08/30/2008] [Accepted: 09/30/2008] [Indexed: 01/15/2023] Open
Abstract
Introduction Anti-citrullinated protein antibodies have a diagnostic role in rheumatoid arthritis (RA); however, little is known about their origins and contribution to pathogenesis. Citrullination is the post-translational conversion of arginine to citrulline by peptidyl arginine deiminase, and increased citrullination of proteins is observed in the joint tissue in RA and in brain tissue in multiple sclerosis (MS). Methods We applied synovial and myelin protein arrays to examine epitope spreading of B cell responses to citrullinated epitopes in both the collagen-induced arthritis (CIA) model for RA and the experimental autoimmune encephalomyelitis (EAE) model for MS. Synovial and myelin protein arrays contain a spectrum of proteins and peptides, including native and citrullinated forms, representing candidate autoantigens in RA and MS, respectively. We applied these arrays to characterise the specificity of autoantibodies in serial serum samples derived from mice with acute and chronic stages of CIA and EAE. Results In samples from pre-disease CIA and acute-disease EAE, we observed autoantibody targeting of the immunising antigen and responses to a limited set of citrullinated epitopes. Over the course of diseases, the autoantibody responses expanded to target multiple citrullinated epitopes in both CIA and EAE. Using immunoblotting and mass spectrometry analysis, we identified citrullination of multiple polypeptides in CIA joint and EAE brain tissue that have not previously been described as citrullinated. Conclusions Our results suggest that anti-citrulline antibody responses develop in the early stages of CIA and EAE, and that autoimmune inflammation results in citrullination of joint proteins in CIA and brain proteins in EAE, thereby creating neoantigens that become additional targets in epitope spreading of autoimmune responses.
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Affiliation(s)
- Brian A Kidd
- Department of Medicine, Division of Immunology and Rheumatology, CCSR 4135, 269 Campus Dr, Stanford University School of Medicine, Stanford, CA, USA.
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4
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Brennan FM, Smith NMG, Owen S, Li C, Amjadi P, Green P, Andersson A, Palfreeman AC, Hillyer P, Foey A, Beech JT, Feldmann M. Resting CD4+ effector memory T cells are precursors of bystander-activated effectors: a surrogate model of rheumatoid arthritis synovial T-cell function. Arthritis Res Ther 2008; 10:R36. [PMID: 18353171 PMCID: PMC2452984 DOI: 10.1186/ar2390] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Revised: 03/04/2008] [Accepted: 03/19/2008] [Indexed: 11/26/2022] Open
Abstract
Background Previously we described a system whereby human peripheral blood T cells stimulated for 8 days in a cytokine cocktail acquired effector function for contact-dependent induction of proinflammatory cytokines from monocytes. We termed these cells cytokine-activated (Tck) cells and found that the signalling pathways elicited in the responding monocytes were identical whether they were placed in contact with Tck cells or with T cells isolated from rheumatoid arthritis (RA) synovial tissue. Methods Here, using magnetic beads and fluorescence-activated cell sorting, we extensively phenotype the Tck effector cells and conclude that effector function resides within the CD4+CD45RO+, CCR7-, CD49dhigh population, and that these cells are derived from the effector memory CD4+ T cells in resting blood. Results After stimulation in culture, these cells produce a wide range of T-cell cytokines, undergo proliferation and differentiate to acquire an extensively activated phenotype resembling RA synovial T cells. Blocking antibodies against CD69, CD18, or CD49d resulted in a reduction of tumour necrosis factor-α production from monocytes stimulated with CD4+CD45RO+ Tck cells in the co-culture assay. Moreover, blockade of these ligands also resulted in inhibition of spontaneous tumour necrosis factor-α production in RA synovial mononuclear cell cultures. Conclusion Taken together, these data strengthen our understanding of T-cell effector function, highlight the multiple involvement of different cell surface ligands in cell-cell contact and, provide novel insights into the pathogenesis of inflammatory RA disease.
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Affiliation(s)
- Fionula M Brennan
- Kennedy Institute of Rheumatology Division, Imperial College Faculty of Medicine, Aspenlea Road, London, W6 8LH, UK.
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5
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Andersson AK, Li C, Brennan FM. Recent developments in the immunobiology of rheumatoid arthritis. Arthritis Res Ther 2008; 10:204. [PMID: 18373887 PMCID: PMC2453771 DOI: 10.1186/ar2370] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Progress into the understanding of immunopathology in rheumatoid arthritis is reviewed in the present article with regard to pro-inflammatory cytokine production, cell activation and recruitment, and osteoclastogenesis. Studies highlight the potential importance of T helper 17 cells and regulatory T cells in driving and suppressing inflammation in rheumatoid arthritis, respectively, and highlight other potential T-cell therapeutic targets. The genetic associations of the HLA shared epitope alleles with antibodies to citrullinated peptides in rheumatoid arthritis patients indicate that T cells are providing help to B cells to produce autoantibodies, and there is increasing evidence that these autoantibodies are pathogenic in rheumatoid arthritis.
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Affiliation(s)
- Anna K Andersson
- Kennedy Institute of Rheumatology, Imperial College Faculty of Medicine, 1 Aspenlea Road, London W6 8LH, UK.
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6
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Franco A, Albani S. Translating the concept of suppressor/regulatory T cells to clinical applications. Int Rev Immunol 2006; 25:27-47. [PMID: 16669133 DOI: 10.1080/08830180500544506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The in vivo expansion of suppressor/regulatory T cells (Tregs) is a desirable event in autoimmunity and transplantation. Here we summarize the general rules involved in antigen recognition by T cells and describe Tregs and their requirements, discussing different levels of immune intervention.
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Affiliation(s)
- Alessandra Franco
- Department of Medicine and Pediatrics, University of California, San Diego, La Jolla, California 92093-0731, USA
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7
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Hueber W, Kidd BA, Tomooka BH, Lee BJ, Bruce B, Fries JF, Sønderstrup G, Monach P, Drijfhout JW, van Venrooij WJ, Utz PJ, Genovese MC, Robinson WH. Antigen microarray profiling of autoantibodies in rheumatoid arthritis. ACTA ACUST UNITED AC 2005; 52:2645-55. [PMID: 16142722 DOI: 10.1002/art.21269] [Citation(s) in RCA: 205] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
OBJECTIVE Because rheumatoid arthritis (RA) is a heterogeneous autoimmune disease in terms of disease manifestations, clinical outcomes, and therapeutic responses, we developed and applied a novel antigen microarray technology to identify distinct serum antibody profiles in patients with RA. METHODS Synovial proteome microarrays, containing 225 peptides and proteins that represent candidate and control antigens, were developed. These arrays were used to profile autoantibodies in randomly selected sera from 2 different cohorts of patients: the Stanford Arthritis Center inception cohort, comprising 18 patients with established RA and 38 controls, and the Arthritis, Rheumatism, and Aging Medical Information System cohort, comprising 58 patients with a clinical diagnosis of RA of <6 months duration. Data were analyzed using the significance analysis of microarrays algorithm, the prediction analysis of microarrays algorithm, and Cluster software. RESULTS Antigen microarrays demonstrated that autoreactive B cell responses targeting citrullinated epitopes were present in a subset of patients with early RA with features predictive of the development of severe RA. In contrast, autoimmune targeting of the native epitopes contained on synovial arrays, including several human cartilage gp39 peptides and type II collagen, were associated with features predictive of less severe RA. CONCLUSION Proteomic analysis of autoantibody reactivities provides diagnostic information and allows stratification of patients with early RA into clinically relevant disease subsets.
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Affiliation(s)
- Wolfgang Hueber
- Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA.
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8
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Albani S, Prakken B. T cell epitope–specific immune therapy for rheumatic diseases. ACTA ACUST UNITED AC 2005; 54:19-25. [PMID: 16385493 DOI: 10.1002/art.21520] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Salvatore Albani
- Departments of Medicine and Pediatrics, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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9
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Fritsch R, Eselböck D, Skriner K, Jahn-Schmid B, Scheinecker C, Bohle B, Tohidast-Akrad M, Hayer S, Neumüller J, Pinol-Roma S, Smolen JS, Steiner G. Characterization of autoreactive T cells to the autoantigens heterogeneous nuclear ribonucleoprotein A2 (RA33) and filaggrin in patients with rheumatoid arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 169:1068-76. [PMID: 12097415 DOI: 10.4049/jimmunol.169.2.1068] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The role of autoimmune reactions in the pathogenesis of rheumatoid arthritis (RA) is poorly understood. To address this issue we have investigated the spontaneous T cell response to two well-characterized humoral autoantigens in RA patients and controls: 1) the heterogeneous nuclear ribonucleoprotein A2, i.e., the RA33 Ag (A2/RA33), and 2) filaggrin in unmodified and citrullinated forms. In stimulation assays A2/RA33 induced proliferative responses in PBMC of almost 60% of the RA patients but in only 20% of the controls (patients with osteoarthritis or psoriatic arthritis and healthy individuals), with substantially stronger responses in RA patients (p < 0.00002). Furthermore, synovial T cells of seven RA patients investigated were also clearly responsive. In contrast, responses to filaggrin were rarely observed and did not differ between RA patients and controls. Analysis of A2/RA33-induced cytokine secretion revealed high IFN-gamma and low IL-4 production in both RA and control PBMC, whereas IL-2 production was mainly observed in RA PBMC (p < 0.03). Moreover, A2/RA33-specific T cell clones from RA patients showed a strong Th1 phenotype and secreted higher amounts of IFN-gamma than Th1 clones from controls (p < 0.04). Inhibition experiments performed with mAbs against MHC class II molecules showed A2/RA33-induced T cell responses to be largely HLA-DR restricted. Finally, immunohistochemical analyses revealed pronounced overexpression of A2/RA33 in synovial tissue of RA patients. Taken together, the presence of autoreactive Th1-like cells in RA patients in conjunction with synovial overexpression of A2/RA33 may indicate potential involvement of this autoantigen in the pathogenesis of RA.
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Affiliation(s)
- Ruth Fritsch
- Division of Rheumatology, Department of Internal Medicine III, University of Vienna, Vienna, Austria
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10
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Wedderburn LR, Patel A, Varsani H, Woo P. Divergence in the degree of clonal expansions in inflammatory T cell subpopulations mirrors HLA-associated risk alleles in genetically and clinically distinct subtypes of childhood arthritis. Int Immunol 2001; 13:1541-50. [PMID: 11717195 DOI: 10.1093/intimm/13.12.1541] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Clinically distinct forms of childhood arthritis are associated with different risk alleles of polymorphic loci within the MHC, which code for the antigen-presenting class I or class II molecules. We have compared the TCR diversity of synovial T cells from children with enthesitis-related (HLA-B27(+)) arthritis and oligoarticular arthritis (with class II MHC risk allele associations) in parallel with peripheral blood T cells from each child, using a high-resolution heteroduplex TCR analysis. We demonstrate that multiple clonal T cell expansions are present and persistent within the joint in both groups, but that there is disease-specific divergence in the dominant T cell subset containing these expansions. Thus, the largest clonotypes within the inflamed joints of children with class II-associated arthritis are within the CD4(+) synovial T cell population, while the dominant clones from children with enthesitis-related arthritis (associated with a class I allele) are within the CD8(+) synovial T cell population. These data provide powerful data to support the concept that recognition of MHC-peptide complexes by T cells plays a role in the pathogenesis of juvenile arthritis.
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MESH Headings
- Alleles
- Amino Acid Sequence
- Arthritis, Juvenile/classification
- Arthritis, Juvenile/genetics
- Arthritis, Juvenile/immunology
- Arthritis, Juvenile/pathology
- Base Sequence
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- CD4-Positive T-Lymphocytes/pathology
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/pathology
- Cartilage, Articular/immunology
- Cartilage, Articular/pathology
- Cell Division/genetics
- Cell Division/immunology
- Child
- Clone Cells
- Gene Rearrangement, beta-Chain T-Cell Antigen Receptor
- Genetic Predisposition to Disease
- HLA Antigens/genetics
- Humans
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/pathology
- Molecular Sequence Data
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Risk Factors
- Synovial Membrane/immunology
- Synovial Membrane/pathology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- T-Lymphocyte Subsets/pathology
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Affiliation(s)
- L R Wedderburn
- Rheumatology Unit, Institute of Child Health, University College London, 30 Guilford Street, London, UK.
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11
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Corrigall VM, Bodman-Smith MD, Fife MS, Canas B, Myers LK, Wooley P, Soh C, Staines NA, Pappin DJ, Berlo SE, van Eden W, van Der Zee R, Lanchbury JS, Panayi GS. The human endoplasmic reticulum molecular chaperone BiP is an autoantigen for rheumatoid arthritis and prevents the induction of experimental arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 166:1492-8. [PMID: 11160188 DOI: 10.4049/jimmunol.166.3.1492] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Rheumatoid arthritis (RA) is the most common, crippling human autoimmune disease. Using Western blotting and tandem mass spectroscopy, we have identified the endoplasmic reticulum chaperone BiP, a 78-kDa glucose-regulated protein, as a possible autoantigen. It preferentially stimulated increased proliferation of synovial T cells from patients with RA but not from patients with other arthritides. Mice with established collagen- or pristane-induced arthritis developed IgG Abs to BiP. Although BiP injected in CFA failed to induce arthritis in several strains of rats and mice, including HLA-DR4(+/-)- and HLA-DR1(+/+)-transgenic animals, it completely inhibited the development of arthritis when given i.v. 1 wk before the injection of type II collagen arthritis. Preimmunization with BiP suppressed the development of adjuvant arthritis in Lewis rats in a similar manner. This is the first report of a mammalian chaperone that is an autoantigen in human RA and in experimental arthritis and that can also prevent the induction of experimental arthritis. These findings may stimulate the development of new immunotherapies for the treatment of RA.
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MESH Headings
- Adult
- Animals
- Arthritis, Experimental/etiology
- Arthritis, Experimental/immunology
- Arthritis, Experimental/prevention & control
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/pathology
- Autoantibodies/biosynthesis
- Autoantibodies/blood
- Autoantigens/blood
- Autoantigens/immunology
- Autoantigens/isolation & purification
- Carrier Proteins/administration & dosage
- Carrier Proteins/immunology
- Endoplasmic Reticulum/immunology
- Endoplasmic Reticulum Chaperone BiP
- Female
- Heat-Shock Proteins
- Humans
- Immunization Schedule
- Injections, Intradermal
- Injections, Intravenous
- Lymphocyte Activation
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Transgenic
- Middle Aged
- Molecular Chaperones/administration & dosage
- Molecular Chaperones/immunology
- Rats
- Rats, Inbred Lew
- Rats, Wistar
- Synovial Membrane/immunology
- Synovial Membrane/pathology
- T-Lymphocytes/immunology
- T-Lymphocytes/pathology
- Tumor Cells, Cultured
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Affiliation(s)
- V M Corrigall
- Department of Rheumatology, Guy's, King's and St. Thomas School of Medicine, King's College London, Guy's Hospital, London, United Kingdom
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12
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Joosten LA, Helsen MM, van Den Berg WB. Blockade of endogenous interleukin 12 results in suppression of murine streptococcal cell wall arthritis by enhancement of interleukin 10 and interleukin 1Ra. Ann Rheum Dis 2000; 59:196-205. [PMID: 10700428 PMCID: PMC1753084 DOI: 10.1136/ard.59.3.196] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE The goal of this study was to investigate the role of endogenous interleukin 12 (IL12) in acute murine streptococcal cell wall (SCW) arthritis. METHODS C57black/6 mice were injected intraperitoneally with rat anti-murine IL12 (C17.8), shortly before induction of arthritis by intra-articular injection of 25 microg SCW fragments into the right knee joint. Joint swelling and chondrocyte synthetic function was analysed several days after induction of SCW arthritis. Local cytokine profile was determined, protein by using ELISA and mRNA by RT-PCR technology. To confirm the findings at later time points, tissue chamber model of inflammation was used. Histology was performed to examine cell influx and cartilage damage. RESULTS Suppression of joint swelling was noted at days 2 and 4, whereas no suppressive effect of anti-IL12 was found at day 1. Severe inhibition of chondrocyte proteoglycan synthesis was seen at day 1 in both arthritic control and anti-IL12 treated mice. However, chondrocyte function was restored at day 4 of arthritis in the anti-IL12 injected animals, but not in the arthritic controls. Moreover, cell influx in synovial tissue and joint cavity was reduced by anti-IL12 treatment. Neutralisation of IL12 reduced the local levels of IL1beta, IL12 and interferon gamma, when examined shortly after induction of SCW arthritis, whereas tumour necrosis factor alpha levels were not affected. In contrast, IL10 and IL1Ra protein and mRNA levels were strongly up regulated in synovial tissues after IL12 blockade. Enhancement of IL10 and IL1Ra by anti-IL12 was confirmed in a tissue chamber model with SCW induced inflammation. CONCLUSIONS This study indicates that IL12 is a pro-inflammatory cytokine during onset of acute SCW arthritis. Balances of proinflammatory and anti-inflammatory cytokines were strongly improved by anti-IL12 treatment.
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Affiliation(s)
- L A Joosten
- Department of Rheumatology, University Hospital Nijmegen, PO Box 9101, 6500 HB Nijmegen, The Netherlands
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13
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McDevitt H. A new model for rheumatoid arthritis? ARTHRITIS RESEARCH 2000; 2:85-9. [PMID: 11094417 PMCID: PMC129990 DOI: 10.1186/ar72] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/1999] [Revised: 01/19/2000] [Accepted: 01/19/1999] [Indexed: 11/10/2022]
Abstract
A chance observation has led to the development of a new murine model for inflammatory arthritis. Arthritis is induced, and transferred, by T-cell-dependent antibodies to glucose-6-phosphate isomerase. This enzyme is expressed in all cells, and is detectable in serum. There are several similarities to rheumatoid arthritis (RA) in the murine disease. This elegant model raises several questions as to how and why a systemic response focuses inflammation so strongly on synovial joints. The model also re-introduces the possibility that antibodies to widely expressed self-proteins may play a role in the pathogenesis of RA.
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Affiliation(s)
- H McDevitt
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California 94305-5124, USA
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14
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Weyand CM, Goronzy JJ. Association of MHC and rheumatoid arthritis. HLA polymorphisms in phenotypic variants of rheumatoid arthritis. ARTHRITIS RESEARCH 2000; 2:212-6. [PMID: 11094432 PMCID: PMC130005 DOI: 10.1186/ar90] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2000] [Accepted: 02/29/2000] [Indexed: 11/10/2022]
Abstract
Genes in the human leukocyte antigen (HLA) region remain the most powerful disease risk genes in rheumatoid arthritis (RA). Several allelic variants of HLA-DRB1 genes have been associated with RA, supporting a role for T-cell receptor-HLA-antigen interactions in the pathologic process. Disease-associated HLA-DRB1 alleles are similar but not identical and certain allelic variants are preferentially enriched in patient populations with defined clinical characteristics. Also, a gene dosing effect of HLA-DRB1 alleles has been suggested by the accumulation of patients with two RA-associated alleles, especially in patient subsets with a severe disease course. Therefore, polymorphisms in HLA genes are being explored as tools to dissect the clinical heterogeneity of the rheumatoid syndrome. Besides HLA polymorphisms, other risk genes will be helpful in defining genotypic profiles correlating with disease phenotypes. One such phenotype is the type of synovial lesion generated by the patient. HLA genes in conjunction with other genetic determinants may predispose patients to a certain pathway of synovial inflammation. Also, patients may or may not develop extraarticular manifestations, which are critical in determining morbidity and mortality. HLA genes, complemented by other RA risk genes, are likely involved in shaping the T-cell repertoire, including the emergence of an unusual T-cell population characterized by the potential of vascular injury, such as seen in extraarticular RA.
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Affiliation(s)
- C M Weyand
- Department of Medicine, Mayo Clinic Foundation, Rochester, Minnesota 55905, USA.
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15
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McDevitt HO. The role of MHC class II molecules in susceptibility and resistance to autoimmunity. Curr Opin Immunol 1998; 10:677-81. [PMID: 9914229 DOI: 10.1016/s0952-7915(98)80088-5] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism by which particular MHC class II alleles mediate susceptibility to a given autoimmune disease is unknown. During the past year, reports have indicated that the effects of MHC class II alleles which protect against type I diabetes in the nonobese diabetic mouse strain may, in some cases, be due to negative selection of diabetogenic T cell receptors and, in other cases, to positive selection of other T cells with a suppressive action on the diabetic process. Progress towards understanding the mechanisms of susceptibility continues to lag.
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Affiliation(s)
- H O McDevitt
- Departments of Microbiology and Immunology, and of Medicine Stanford University School of Medicine Stanford CA 94305-5402 USA.
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Parry SL, Hall FC, Olson J, Kamradt T, Sønderstrup G. Autoreactivity versus autoaggression: a different perspective on human autoantigens. Curr Opin Immunol 1998; 10:663-8. [PMID: 9914227 DOI: 10.1016/s0952-7915(98)80086-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Antigen-specific B and T cell responses against myelin basic protein, as well as responses against beta-islet-cells or joint tissue, are commonly found both in patients with autoimmune disease and in normal control subjects with disease-associated HLA-DR/DQ alleles. Thus, autoreactive immune responses are not disease-specific; however, the presence of certain autoantibodies may have prognostic value and may aid in disease management.
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Affiliation(s)
- S L Parry
- Department of Microbiology and Immunology Stanford University School of Medicine Stanford CA 94305-5402 USA
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