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Sehnert B, Valero-Esquitino V, Schett G, Unger T, Steckelings UM, Voll RE. Angiotensin AT2 Receptor Stimulation Alleviates Collagen-Induced Arthritis by Upregulation of Regulatory T Cell Numbers. Front Immunol 2022; 13:921488. [PMID: 35874732 PMCID: PMC9304956 DOI: 10.3389/fimmu.2022.921488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
The angiotensin AT2 receptor (AT2R) is a main receptor of the protective arm of the renin-angiotensin system and exerts for instance anti-inflammatory effects. The impact of AT2R stimulation on autoimmune diseases such as rheumatoid arthritis (RA) is not yet known. We investigated the therapeutic potential of AT2R-stimulation with the selective non-peptide AT2R agonist Compound 21 (C21) in collagen-induced arthritis (CIA), an animal model for inflammatory arthritis. Arthritis was induced by immunization of DBA/1J mice with collagen type II (CII). Prophylactic and therapeutic C21 treatment alleviates arthritis severity and incidence in CIA. Joint histology revealed significantly less infiltrates of IL-1 beta and IL-17A expressing cells and a well-preserved articular cartilage in C21- treated mice. In CIA, the number of CD4+CD25+FoxP3+ regulatory T (Treg) cells significantly increased upon C21 treatment compared to vehicle. T cell differentiation experiments demonstrated increased expression of FoxP3 mRNA, whereas IL-17A, STAT3 and IFN-gamma mRNA expression were reduced upon C21 treatment. In accordance with the mRNA data, C21 upregulated the percentage of CD4+FoxP3+ cells in Treg polarizing cultures compared to medium-treated controls, whereas the percentage of CD4+IL-17A+ and CD4+IFN-gamma+ T cells was suppressed. To conclude, C21 exerts beneficial effects on T cell-mediated experimental arthritis. We found that C21-induced AT2R-stimulation promotes the expansion of CD4+ regulatory T cells and suppresses IL-17A production. Thus, AT2R-stimulation may represent an attractive treatment strategy for arthritis.
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Affiliation(s)
- Bettina Sehnert
- Department of Rheumatology and Clinical Immunology, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- *Correspondence: Bettina Sehnert, ; Reinhard Edmund Voll,
| | | | - Georg Schett
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum Immuntherapie, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Thomas Unger
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Ulrike Muscha Steckelings
- Institute of Molecular Medicine (IMM) – Department of Cardiovascular & Renal Research, University of Southern Denmark, Odense, Denmark
| | - Reinhard Edmund Voll
- Department of Rheumatology and Clinical Immunology, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI) Freiburg, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- *Correspondence: Bettina Sehnert, ; Reinhard Edmund Voll,
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Manivel VA, Mullazehi M, Padyukov L, Westerlind H, Klareskog L, Alfredsson L, Saevarsdottir S, Rönnelid J. Anticollagen type II antibodies are associated with an acute onset rheumatoid arthritis phenotype and prognosticate lower degree of inflammation during 5 years follow-up. Ann Rheum Dis 2017; 76:1529-1536. [PMID: 28336519 PMCID: PMC5561381 DOI: 10.1136/annrheumdis-2016-210873] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 02/26/2017] [Accepted: 03/02/2017] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Antifibrillar collagen type II (anti-CII) antibody-positive patients with rheumatoid arthritis (RA) have early but not late signs of increased inflammation and joint erosions. We wanted to replicate this in a large RA cohort, and to relate to human leukocyte antigen (HLA)-DRB1* alleles. METHODS Anti-CII and anti-cyclic citrullinated peptide (CCP)2 were measured at baseline in 773 patients with RA from the Swedish Epidemiological Investigation in Rheumatoid Arthritis (EIRA) study with clinical follow-up data from the Swedish Rheumatology Quality Register (SRQ) registry, and 1476 with HLA-DRB1* information. Comparisons were done concerning C reactive protein (CRP), erythrocyte sedimentation rate (ESR), tender joint count (TJC), swollen joint count (SJC), Disease Activity Score encompassing 28 joints based on ESR (DAS28), DAS28CRP, pain-Visual Analogue Scale (VAS), global-VAS and Health Assessment Questionnaire Score (HAQ) at eight occasions during 5 years, and association with HLA-DRB1* alleles. RESULTS Anti-CII associated with elevated CRP, ESR, SJC, DAS28 and DAS28CRP at diagnosis and up to 6 months, whereas anti-CCP2 associated with SJC and DAS28 from 6 months to 5 years, but not earlier. The anti-CII-associated phenotype was strong, and predominated in anti-CII/anti-CCP2 double-positive patients. Anti-CII was associated with improvements in CRP, ESR, SJC, TJC and DAS28, whereas anti-CCP2 was associated with deteriorations in SJC and DAS28 over time. Anti-CII-positive patients achieved European League Against Rheumatism good or moderate response more often than negative patients. Anti-CII was positively associated with HLA-DRB1*01 and HLA-DRB1*03, with significant interaction, and double-positive individuals had >14 times higher mean anti-CII levels than HLA double negatives. Whereas smoking was associated with elevated anti-CCP2 levels, smokers had lower anti-CII levels. CONCLUSIONS Anti-CII seropositive RA represents a distinct phenotype, in many respects representing the converse to the clinical, genetic and smoking associations described for anticitrullinated protein peptide autoantibodies. Although not diagnostically useful, early anti-CII determinations predict favourable inflammatory outcome in RA.
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Affiliation(s)
- Vivek Anand Manivel
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala Sweden
| | - Mohammed Mullazehi
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala Sweden
| | - Leonid Padyukov
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Helga Westerlind
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Lars Alfredsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Saedis Saevarsdottir
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Johan Rönnelid
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala Sweden
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3
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Manivel VA, Sohrabian A, Wick MC, Mullazehi M, Håkansson LD, Rönnelid J. Anti-type II collagen immune complex-induced granulocyte reactivity is associated with joint erosions in RA patients with anti-collagen antibodies. Arthritis Res Ther 2015; 17:8. [PMID: 25598326 PMCID: PMC4349301 DOI: 10.1186/s13075-015-0523-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 01/08/2015] [Indexed: 11/10/2022] Open
Abstract
Introduction Rheumatoid arthritis (RA) patients with autoantibodies against collagen type II (CII) are characterized by acute RA onset with elevated inflammatory measures and early joint erosions as well as increased production of tumor necrosis factor-α (ΤΝF-α) by peripheral blood mononuclear cells (PBMC) stimulated by anti-CII immune complexes (IC) in vitro. Polymorphonuclear granulocytes (PMN) are abundant in RA synovial fluids, where they might interact directly with anti-CII IC in the articular cartilage, but no studies have investigated PMN responses towards anti-CII IC. The aim was to investigate whether PMN react towards anti-CII IC, and to what extent such reactivity might relate to the clinical acute onset RA phenotype associated with elevated levels of anti-CII. Methods PMN and PBMC isolated from healthy donors were stimulated with IC made with a set of 72 baseline patient sera (24 anti-CII positive, 48 anti-CII negative) chosen from a clinically well-characterized RA cohort with two-year radiological follow-up with Larsen scoring. PMN expression of cluster of differentiation (CD)11b, CD66b, CD16 and CD32 was measured by flow cytometry, whereas PMN production of myeloperoxidase (MPO) and interleukin (IL)-17, and PBMC production of ΤΝF-α was measured with enzyme linked immunosorbent assay. Results PMN expression of CD11b, CD66b and MPO, and PBMC production of ΤΝF-α were upregulated whereas PMN expression of CD16 and CD32 were downregulated by anti-CII IC. CD16, CD66b, and MPO production correlated to serum anti-CII levels (Spearman’s ρ = 0.315, 0.675 and 0.253, respectively). CD16 was associated with early joint erosions (P = 0.024, 0.034, 0.046 at baseline, one and two years) and CD66b was associated with changes in joint erosions (P = 0.017 and 0.016, at one and two years compared to baseline, respectively). CD66b was associated with baseline C-reactive protein and PBMC production of ΤΝF-α was associated with baseline erythrocyte sedimentation rate, in accordance with our earlier findings. No clinical associations were observed for MPO or IL-17. Conclusion PMN responses against anti-CII IC are more closely associated with early joint erosions than are PBMC cytokine responses. PMN reactivity against anti-CII IC may contribute to joint destruction in newly diagnosed RA patients with high levels of anti-CII.
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Affiliation(s)
- Vivek Anand Manivel
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
| | - Azita Sohrabian
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
| | - Marius C Wick
- Department of Radiology, Karolinska University Hospital, Stockholm, Sweden.
| | - Mohammed Mullazehi
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
| | | | - Johan Rönnelid
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden. .,Unit of Rheumatology, Department of Medicine, Karolinska Institutet, Stockholm, Sweden.
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Zhu X, Xiao L, Huo R, Zhang J, Lin J, Xie J, Sun S, He Y, Sun Y, Zhou Z, Shen B, Li N. Cyr61 is involved in neutrophil infiltration in joints by inducing IL-8 production by fibroblast-like synoviocytes in rheumatoid arthritis. Arthritis Res Ther 2014; 15:R187. [PMID: 24517278 PMCID: PMC3978874 DOI: 10.1186/ar4377] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 10/28/2013] [Indexed: 02/06/2023] Open
Abstract
Introduction It is well known that neutrophils play very important roles in the development of rheumatoid arthritis (RA) and interleukin (IL)-8 is a critical chemokine in promoting neutrophil migration. We previously showed that increased production of Cyr61 by fibroblast-like synoviocytes (FLS) in RA promotes FLS proliferation and Th17 cell differentiation, thus Cyr61 is a pro-inflammatory factor in RA pathogenesis. In this study, we explored the role of Cyr61 in neutrophil migration to the joints of RA patients. Methods RA FLS were treated with Cyr61 and IL-8 expression was analyzed by real-time PCR and ELISA. The migration of neutrophils recruited by the culture supernatants was determined by the use of a chemotaxis assay. Mice with collagen-induced arthritis (CIA) were treated with anti-Cyr61 monoclonal antibodies (mAb), or IgG1 as a control. Arthritis severity was determined by visual examination of the paws and joint destruction was determined by hematoxylin-eosin (H&E) staining. Signal transduction pathways in Cyr61-induced IL-8 production were investigated by real-time PCR, western blotting, confocal microscopy, luciferase reporter assay or chromatin immunoprecipitation (ChIP) assay. Results We found that Cyr61 induced IL-8 production by RA FLS in an IL-1β and TNF-α independent pathway. Moreover, we identified that Cyr61-induced IL-8-mediated neutrophil migration in vitro. Using a CIA animal model, we found that treatment with anti-Cyr61 mAb led to a reduction in MIP-2 (a counterpart of human IL-8) expression and decrease in neutrophil infiltration, which is consistent with an attenuation of inflammation in vivo. Mechanistically, we showed that Cyr61 induced IL-8 production in FLS via AKT, JNK and ERK1/2-dependent AP-1, C/EBPβ and NF-κB signaling pathways. Conclusions Our results here reveal a novel role of Cyr61 in the pathogenesis of RA. It promotes neutrophil infiltration via up-regulation of IL-8 production in FLS. Taken together with our previous work, this study provides further evidence that Cyr61 plays a key role in the vicious cycle formed by the interaction between infiltrating neutrophils, proliferated FLS and activated Th17 cells in the development of RA.
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Sackmann EK, Berthier E, Young EWK, Shelef MA, Wernimont SA, Huttenlocher A, Beebe DJ. Microfluidic kit-on-a-lid: a versatile platform for neutrophil chemotaxis assays. Blood 2012; 120:e45-53. [PMID: 22915642 PMCID: PMC3466974 DOI: 10.1182/blood-2012-03-416453] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 08/05/2012] [Indexed: 12/31/2022] Open
Abstract
Improvements in neutrophil chemotaxis assays have advanced our understanding of the mechanisms of neutrophil recruitment; however, traditional methods limit biologic inquiry in important areas. We report a microfluidic technology that enables neutrophil purification and chemotaxis on-chip within minutes, using nanoliters of whole blood, and only requires a micropipette to operate. The low sample volume requirements and novel lid-based method for initiating the gradient of chemoattractant enabled the measurement of human neutrophil migration on a cell monolayer to probe the adherent and migratory states of neutrophils under inflammatory conditions; mouse neutrophil chemotaxis without sacrificing the animal; and both 2D and 3D neutrophil chemotaxis. First, the neutrophil chemotaxis on endothelial cells revealed 2 distinct neutrophil phenotypes, showing that endothelial cell-neutrophil interactions influence neutrophil chemotactic behavior. Second, we validated the mouse neutrophil chemotaxis assay by comparing the adhesion and chemotaxis of neutrophils from chronically inflamed and wild-type mice; we observed significantly higher neutrophil adhesion in blood obtained from chronically inflamed mice. Third, we show that 2D and 3D neutrophil chemotaxis can be directly compared using our technique. These methods allow for new avenues of research while reducing the complexity, time, and sample volume requirements to perform neutrophil chemotaxis assays.
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Affiliation(s)
- Eric K Sackmann
- Materials Science Program, Wisconsin Institute for Medical Research, Madison, WI 53705, USA
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6
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Németh T, Mócsai A. The role of neutrophils in autoimmune diseases. Immunol Lett 2012; 143:9-19. [PMID: 22342996 DOI: 10.1016/j.imlet.2012.01.013] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 01/27/2012] [Accepted: 01/29/2012] [Indexed: 12/29/2022]
Abstract
Though chronic autoimmune disorders such as rheumatoid arthritis or systemic lupus erythematosus affect a significant percentage of the human population and strongly diminish the quality of life and life expectancy in Western societies, the molecular pathomechanisms of those diseases are still poorly understood, hindering the development of novel treatment strategies. Autoimmune diseases are thought to be caused by disturbed recognition of foreign and self antigens, leading to the emergence of autoreactive T-cells (so-called immunization phase). Those autoreactive T-cells then trigger the second (so-called effector) phase of the disease which is characterized by immune-mediated damage to host tissues. For a long time, neutrophils have mainly been neglected as potential players of the development of autoimmune diseases. However, a significant amount of new experimental data now indicates that neutrophils likely play an important role in both the immunization and the effector phase of autoimmune diseases. Here we review the current literature on the role of neutrophils in autoimmune diseases with special emphasis on rheumatoid arthritis, systemic lupus erythematosus, autoimmune vasculitides and blistering skin diseases. We also discuss the role of neutrophil cell surface receptors (e.g. integrins, Fc-receptors or chemokine receptors) and intracellular signal transduction pathways (e.g. Syk and other tyrosine kinases) in the pathogenesis of autoimmune inflammation. Though many of the results discussed in this review were obtained using animal models, additional data indicate that those mechanisms likely also contribute to human pathology. Taken together, neutrophils should be considered as one of the important cell types in autoimmune disease pathogenesis and they may also prove to be suitable targets of the pharmacological control of those diseases in the future.
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Affiliation(s)
- Tamás Németh
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary.
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7
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Alberts R, Chen H, Pommerenke C, Smit AB, Spijker S, Williams RW, Geffers R, Bruder D, Schughart K. Expression QTL mapping in regulatory and helper T cells from the BXD family of strains reveals novel cell-specific genes, gene-gene interactions and candidate genes for auto-immune disease. BMC Genomics 2011; 12:610. [PMID: 22182475 PMCID: PMC3277499 DOI: 10.1186/1471-2164-12-610] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 12/19/2011] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Regulatory T cells (Tregs) play an essential role in the control of the immune response. Treg cells represent important targets for therapeutic interventions of the immune system. Therefore, it will be very important to understand in more detail which genes are specifically activated in Treg cells versus T helper (Th) cells, and which gene regulatory circuits may be involved in specifying and maintaining Treg cell homeostasis. RESULTS We isolated Treg and Th cells from a genetically diverse family of 31 BXD type recombinant inbred strains and the fully inbred parental strains of this family--C57BL/6J and DBA/2J. Subsequently genome-wide gene expression studies were performed from the isolated Treg and Th cells. A comparative analysis of the transcriptomes of these cell populations allowed us to identify many novel differentially expressed genes. Analysis of cis- and trans-expression Quantitative Trait Loci (eQTLs) highlighted common and unique regulatory mechanisms that are active in the two cell types. Trans-eQTL regions were found for the Treg functional genes Nrp1, Stat3 and Ikzf4. Analyses of the respective QTL intervals suggested several candidate genes that may be involved in regulating these genes in Treg cells. Similarly, possible candidate genes were found which may regulate the expression of F2rl1, Ctla4, Klrb1f. In addition, we identified a focused group of candidate genes that may be important for the maintenance of self-tolerance and the prevention of allergy. CONCLUSIONS Variation of expression across the strains allowed us to find many novel gene-interaction networks in both T cell subsets. In addition, these two data sets enabled us to identify many differentially expressed genes and to nominate candidate genes that may have important functions for the maintenance of self-tolerance and the prevention of allergy.
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Affiliation(s)
- Rudi Alberts
- Department of Infection Genetics, University of Veterinary Medicine Hannover, Braunschweig, Germany
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8
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Gompels LL, Lim NH, Vincent T, Paleolog EM. In vivo optical imaging in arthritis--an enlightening future? Rheumatology (Oxford) 2010; 49:1436-46. [PMID: 20338885 DOI: 10.1093/rheumatology/keq012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In vivo molecular optical imaging has significant potential to delineate and measure, at the macroscopic level, in vivo biological processes that are occurring at the cellular and molecular level. Optical imaging has already been developed for in vitro and ex vivo applications in molecular and cellular biology (e.g. fluorescence confocal microscopy), but is still at an early stage of development as a whole-animal in vivo imaging technique. Both sensitivity and spatial resolution remain incompletely defined. Rapid advances in hardware technology and highly innovative reporter probes and dyes will be expected to deliver significant insight into perturbations of molecular pathways that occur in disease, ultimately with the potential of translating into future molecular imaging techniques for patients with arthritis. This review will focus on currently available technologies for live in vivo animal optical imaging, including fluorescence reflectance imaging, potential novel tomographic techniques, bioluminescence reporter technology and potential novel labelling techniques, highlighting in particular the potential application of in vivo fluorescence imaging in arthritis.
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Affiliation(s)
- Luke L Gompels
- Kennedy Institute of Rheumatology, Imperial College London, Faculty of Medicine, 65 Aspenlea Road, London W6 8LH, UK.
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9
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Erős G, Ibrahim S, Siebert N, Boros M, Vollmar B. Oral phosphatidylcholine pretreatment alleviates the signs of experimental rheumatoid arthritis. Arthritis Res Ther 2009; 11:R43. [PMID: 19296835 PMCID: PMC2688190 DOI: 10.1186/ar2651] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 02/16/2009] [Accepted: 03/18/2009] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION Phosphatidylcholine and phosphatidylcholine-derived metabolites exhibit anti-inflammatory properties in various stress conditions. We hypothesized that dietary phosphatidylcholine may potentially function as an anti-inflammatory substance and may decrease inflammatory activation in a chronic murine model of rheumatoid arthritis (collagen-induced arthritis). METHODS The experiments were performed on male DBA1/J mice. In groups 1 to 3 (n = 10 each), collagen-induced arthritis was induced by administration of bovine collagen II. In group 2 the animals were fed ad libitum with phosphatidylcholine-enriched diet as a pretreatment, while the animals of group 3 received this nourishment as a therapy, after the onset of the disease. The severity of the disease and inflammation-linked hyperalgesia were evaluated with semiquantitative scoring systems, while the venular leukocyte-endothelial cell interactions and functional capillary density were assessed by means of in vivo fluorescence microscopy of the synovial tissue. Additionally, the mRNA expressions of cannabinoid receptors 1 and 2, TNFalpha and endothelial and inducible nitric oxide synthase were determined, and classical histological analysis was performed. RESULTS Phosphatidylcholine pretreatment reduced the collagen-induced arthritis-induced hypersensitivity, and decreased the number of leukocyte-endothelial cell interactions and the extent of functional capillary density as compared with those of group 1. It also ameliorated the tissue damage and decreased inducible nitric oxide synthase expression. The expressions of the cannabinoid receptors and TNFalpha were not influenced by the phosphatidylcholine intake. Phosphatidylcholine-enriched food administrated as therapy failed to evoke the aforementioned changes, apart from the reduction of the inducible nitric oxide synthase expression. CONCLUSIONS Phosphatidylcholine-enriched food as pretreatment, but not as therapy, appears to exert beneficial effects on the morphological, functional and microcirculatory characteristics of chronic arthritis. We propose that oral phosphatidylcholine may be a preventive approach in ameliorating experimental rheumatoid arthritis-induced joint damage.
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MESH Headings
- Administration, Oral
- Animals
- Anti-Inflammatory Agents/administration & dosage
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Arthritis, Experimental/prevention & control
- Arthritis, Rheumatoid/metabolism
- Arthritis, Rheumatoid/pathology
- Arthritis, Rheumatoid/prevention & control
- Blood Circulation
- Male
- Mice
- Microscopy, Fluorescence
- Nitric Oxide Synthase Type II/biosynthesis
- Nitric Oxide Synthase Type III/biosynthesis
- Phosphatidylcholines/administration & dosage
- Receptor, Cannabinoid, CB1/biosynthesis
- Receptor, Cannabinoid, CB2/biosynthesis
- Reverse Transcriptase Polymerase Chain Reaction
- Synovial Membrane/blood supply
- Synovial Membrane/pathology
- Tumor Necrosis Factor-alpha/biosynthesis
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Affiliation(s)
- Gabor Erős
- Institute for Experimental Surgery, University of Rostock, Schillingallee 69a, Rostock D-18057, Germany
- Institute of Surgical Research, University of Szeged, Pécsi u. 6, Szeged H-6720, Hungary
| | - Saleh Ibrahim
- Immunogenetics Group, University of Rostock, Schillingallee 70, Rostock D-18057, Germany
| | - Nikolai Siebert
- Institute for Experimental Surgery, University of Rostock, Schillingallee 69a, Rostock D-18057, Germany
| | - Mihály Boros
- Institute of Surgical Research, University of Szeged, Pécsi u. 6, Szeged H-6720, Hungary
| | - Brigitte Vollmar
- Institute for Experimental Surgery, University of Rostock, Schillingallee 69a, Rostock D-18057, Germany
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10
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Eipel C, Kidess E, Abshagen K, LeMinh K, Menger MD, Burkhardt H, Vollmar B. Antileukoproteinase protects against hepatic inflammation, but not apoptosis in the response of D-galactosamine-sensitized mice to lipopolysaccharide. Br J Pharmacol 2007; 151:406-13. [PMID: 17420780 PMCID: PMC2013978 DOI: 10.1038/sj.bjp.0707230] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Revised: 01/23/2007] [Accepted: 02/13/2007] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE There is major evidence for the strong bi-directional interrelation of parenchymal cell apoptosis and leukocyte accumulation and inflammation in acute liver injury. Therefore, the aim of this in vivo study was to investigate the anti-apoptotic and anti-inflammatory potential of antileukoproteinase (ALP) in a murine model of acute liver failure. EXPERIMENTAL APPROACH C57BL/6J mice were given galactosamine (D-GalN) and E. coli lipopolysaccharide (LPS) followed by administration of saline or ALP. Besides survival rate, hepatic tissue damage and inflammatory response were analyzed by intravital fluorescence microscopy 6 hours after treatment. In addition, immunohistochemical analysis of NFkappaB-p65 and hepatocellular apoptosis, plasma levels of AST/ALT, TNF-alpha and IL-10 were determined. KEY RESULTS Administration of D-GalN/LPS provoked hepatic damage, including marked leukocyte recruitment and microvascular perfusion failure, as well as hepatocellular apoptosis and enzyme release. NFkappaB-p65 became increasingly detectable in hepatocellular nuclei, accompanied by a rise of TNF-alpha and IL-10 plasma levels. ALP markedly reduced intrahepatic leukocyte accumulation, nuclear translocation of NFkappaB and plasma levels of TNF-alpha and IL-10. Moreover, liver enzyme levels indicated the absence of necrotic parenchymal cell death. In contrast, ALP failed to block both apoptosis and caspase-3 levels and the mortality rate of ALP-treated animals was comparable to that of saline-treated mice. CONCLUSIONS AND IMPLICATIONS ALP could effectively prevent D-GalN/LPS-associated intrahepatic inflammatory responses by inhibition of NFkappaB activity, but not apoptosis-driven mortality. Thus, a protease-inactivating approach such as application of ALP seems to be inadequate in damaged liver where apoptosis represents the predominant mode of cell death.
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Affiliation(s)
- C Eipel
- Institute for Experimental Surgery, University of Rostock Rostock, Germany
| | - E Kidess
- Institute for Experimental Surgery, University of Rostock Rostock, Germany
| | - K Abshagen
- Institute for Experimental Surgery, University of Rostock Rostock, Germany
| | - K LeMinh
- Institute for Experimental Surgery, University of Rostock Rostock, Germany
| | - M D Menger
- Institute of Clinical and Experimental Surgery, University of Saarland Homburg-Saar, Germany
| | - H Burkhardt
- Division of Rheumatology, Johann Wolfgang Goethe University Frankfurt am Main Frankfurt am Main, Germany
| | - B Vollmar
- Institute for Experimental Surgery, University of Rostock Rostock, Germany
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11
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Nandakumar KS, Holmdahl R. Antibody-induced arthritis: disease mechanisms and genes involved at the effector phase of arthritis. Arthritis Res Ther 2007; 8:223. [PMID: 17254316 PMCID: PMC1794524 DOI: 10.1186/ar2089] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
During the development of rheumatoid arthritis (RA) autoantibodies to IgG-Fc, citrullinated proteins, collagen type II (CII), glucose 6 phosphoisomerase (G6PI) and some other self-antigens appear. Of these, a pathogenic effect of the anti-CII and anti-G6PI antibodies is well demonstrated using animal models. These new antibody mediated arthritis models have proven to be very useful for studies involved in understanding the molecular pathways of the induction of arthritis in joints. Both the complement and FcgammaR systems have been found to play essential roles. Neutrophils and macrophages are important inflammatory cells and the secretion of tumour necrosis factor-alpha and IL-1beta is pathogenic. The identification of the genetic polymorphisms predisposing to arthritis is important for understanding the complexity of arthritis. Disease mechanisms and gene regions studied using the two antibody-induced arthritis mouse models (collagen antibody-induced arthritis and serum transfer-induced arthritis) are compared and discussed for their relevance in RA pathogenesis.
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MESH Headings
- Animals
- Antibodies/pharmacology
- Antibodies, Monoclonal/genetics
- Antibodies, Monoclonal/metabolism
- Antibody Specificity
- Arthritis, Experimental
- Arthritis, Rheumatoid/genetics
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/physiopathology
- Autoantibodies/immunology
- Autoantibodies/metabolism
- B-Lymphocytes/immunology
- Disease Models, Animal
- Genetic Markers/genetics
- Genetic Predisposition to Disease
- Glucose-6-Phosphate Isomerase/genetics
- Glucose-6-Phosphate Isomerase/metabolism
- Mice
- Mice, Inbred DBA
- Mice, Transgenic
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Rheumatoid Factor/metabolism
- Sensitivity and Specificity
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
| | - Rikard Holmdahl
- Medical Inflammation Research, Lund University, Lund 22184, Sweden
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