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Azuaga AB, Cuervo A, Celis R, Frade-Sosa B, Sarmiento-Monroy JC, Ruiz-Esquide V, Gómez-Puerta JA, Sanmartí R, Ramírez J. Synovial tissue features associated with poor prognosis in inflammatory arthritis. Arthritis Res Ther 2024; 26:18. [PMID: 38200561 PMCID: PMC10777612 DOI: 10.1186/s13075-023-03255-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Inflammatory arthritis encompasses a group of immune-mediated diseases characterized by chronic joint inflammation. Despite having pathogenic mechanisms in common, the prognosis of rheumatoid arthritis (RA), psoriatic arthritis (PsA), and undifferentiated arthritis (UA) could be different regarding progression to chronic, to erosive, or to self-limited disease. Our aim was to evaluate the potential association of synovial tissue (ST) inflammatory cell infiltrate, the presence of ectopic lymphoid neogenesis (LN +) structures, and poor prognosis factors (PPF) in patients with RA, PsA, and UA. METHODS We conducted a retrospective study including patients with active arthritis (RA, PsA, UA) who had ST obtained by rheumatological arthroscopy or ultrasound-guided biopsy. Clinical, demographic, and immunohistochemical data of the synovium was evaluated. Patients with biological therapy at the time of synovial biopsy were excluded. PPF in patients with RA and UA were defined by the presence of anti-cyclic citrullinated peptide antibodies and/or rheumatoid factor, development of bone erosions, or requirement of biological therapy during the follow-up. PPF in patients with PsA were defined as the presence of high levels of acute-phase reactants (ESR/CRP), dactylitis or nail involvement at the time of biopsy, development of bone erosion, or requirement of biological therapy during the follow-up. RESULTS A total of 88 patients were included: 26 RA, 33 PsA, and 29 UA. All patients were followed up for 5 years after the biopsy. Fourteen (53.84%) RA patients had PPF, and 17 (65.38%) had LN + . LN + was associated with PPF (p 0.038) and biologic therapy initiation (p 0.018). A total of 14 (43.75%) PsA patients had PPF. CD15 infiltrate (410.68 [SD 477.63] cells/mm2) was associated with PPF (p 0.008) in PsA patients. Sixteen (55.17%) patients with UA had PPF, and 13 (44.82%) had LN + . In this group, synovial CD68 + macrophages cells density was negatively correlated with DAS28-CRP (r = - 0.346, p 0.042). CONCLUSIONS The presence of LN + and higher CD15 + polymorphonuclear cells infiltrate was associated with PPF in RA and PsA, respectively. No associations were found for UA. These findings suggest a great heterogeneity of the ST features and its pathogenic implications in the subtypes of inflammatory arthritis.
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Affiliation(s)
- Ana Belén Azuaga
- Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain.
| | - Andrea Cuervo
- Rheumatology Department, Hospital General de Granollers, Granollers, Spain
| | - Raquel Celis
- Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain
| | | | | | | | | | - Raimon Sanmartí
- Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain
| | - Julio Ramírez
- Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain.
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2
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De Stefano L, Bugatti S, Piccin V, D'Ambrosio G, Luvaro T, Xoxi B, Montecucco C, Manzo A. The access route through the anatomical snuffbox in ultrasound-guided synovial biopsy of the wrist allows for a safe and effective collection of tissue samples in inflammatory arthritis. Arthritis Res Ther 2023; 25:119. [PMID: 37422683 PMCID: PMC10329327 DOI: 10.1186/s13075-023-03101-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/27/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND A proof-of-concept study to evaluate the feasibility and safety of minimally invasive ultrasound (US)-guided synovial biopsy of the radiocarpal (RC) joint using the anatomical snuffbox as an access route. METHODS Twenty consecutive patients with active chronic arthritis of the wrist underwent minimally invasive US-guided synovial biopsy of the RC joint using the anatomical snuffbox as the access route. Samples were retrieved from 3 predetermined biopsy target sites of the RC synovia (proximal, vault, and distal site), aiming for a minimum of 12 samples. The procedure's feasibility was evaluated based on the number and histological quality of retrieved tissue fragments tested on pre-defined histometric parameters. The safety and tolerability of the procedure were assessed through 1-week and 1-month follow-up clinical evaluations. RESULTS A median number of 17 fragments (≥ 1 mm diameter size at macroscopic evaluation) per procedure was processed for histopathology (range 9-24) and dedicated to the study. At the histopathologic evaluation, a gradable tissue (visible lining layer and ≥ 4 fragments with IST) was recognized in 19/20 biopsies (95%), and all pre-defined histometric parameters were judged applicable and successfully measured in 19/19 gradable biopsies. All three biopsy target sites showed sampling accessibility. The entire procedure was generally well tolerated. At the 1-month follow-up, no patients showed infectious complications. CONCLUSIONS The access route through the anatomical snuff box in US-guided synovial biopsies of the RC joint allows for a safe and targeted collection of adequate tissue samples. This modification of the traditional access route may allow easier, repeatable, and safer sampling of anatomically distinct areas of the wrist in the course of arthritis.
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Affiliation(s)
- Ludovico De Stefano
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy.
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy.
| | - Serena Bugatti
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Veronica Piccin
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | | | - Terenzj Luvaro
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy
| | - Blerina Xoxi
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Carlomaurizio Montecucco
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Antonio Manzo
- Department of Internal Medicine and Therapeutics, Università Di Pavia, Pavia, Italy
- Division of Rheumatology, Fondazione IRCCS Policlinico San Matteo, Viale Golgi 19, 27100, Pavia, Italy
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3
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Azuaga AB, Ramírez J, Cañete JD. Psoriatic Arthritis: Pathogenesis and Targeted Therapies. Int J Mol Sci 2023; 24:4901. [PMID: 36902329 PMCID: PMC10003101 DOI: 10.3390/ijms24054901] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Psoriatic arthritis (PsA), a heterogeneous chronic inflammatory immune-mediated disease characterized by musculoskeletal inflammation (arthritis, enthesitis, spondylitis, and dactylitis), generally occurs in patients with psoriasis. PsA is also associated with uveitis and inflammatory bowel disease (Crohn's disease and ulcerative colitis). To capture these manifestations as well as the associated comorbidities, and to recognize their underlining common pathogenesis, the name of psoriatic disease was coined. The pathogenesis of PsA is complex and multifaceted, with an interplay of genetic predisposition, triggering environmental factors, and activation of the innate and adaptive immune system, although autoinflammation has also been implicated. Research has identified several immune-inflammatory pathways defined by cytokines (IL-23/IL-17, TNF), leading to the development of efficacious therapeutic targets. However, heterogeneous responses to these drugs occur in different patients and in the different tissues involved, resulting in a challenge to the global management of the disease. Therefore, more translational research is necessary in order to identify new targets and improve current disease outcomes. Hopefully, this may become a reality through the integration of different omics technologies that allow better understanding of the relevant cellular and molecular players of the different tissues and manifestations of the disease. In this narrative review, we aim to provide an updated overview of the pathophysiology, including the latest findings from multiomics studies, and to describe current targeted therapies.
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Affiliation(s)
- Ana Belén Azuaga
- Rheumatology Department, Hospital Clinic and IDIBAPS of Barcelona, 08036 Barcelona, Spain
| | | | - Juan D. Cañete
- Rheumatology Department, Hospital Clinic and IDIBAPS of Barcelona, 08036 Barcelona, Spain
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4
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Tenazinha C, Barros R, Fonseca JE, Vieira-Sousa E. Histopathology of Psoriatic Arthritis Synovium—A Narrative Review. Front Med (Lausanne) 2022; 9:860813. [PMID: 35847785 PMCID: PMC9283901 DOI: 10.3389/fmed.2022.860813] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 04/05/2022] [Indexed: 11/13/2022] Open
Abstract
Psoriatic arthritis (PsA) is a phenotypically heterogeneous chronic inflammatory disease associated to type I major histocompatibility complex alleles whose complex pathogenesis is still not completely understood. The psoriatic synovium shares general features of chronic inflammation with rheumatoid arthritis (RA) and other arthritis, such as hyperplasia of the intimal lining layer, sublining influx of inflammatory cells and neoangiogenesis, but recognizing disease-specific histopathologic findings may help in diagnosis and definition of therapeutic targets. Available literature reports conflicting data regarding the extension of lining hyperplasia, that does not allow depiction from RA. Sublining inflammatory cells consist of T and B cells and macrophages, plasma cells, mast cells and follicular dendritic cells, with a higher amount of overall T, mast cell and IL-17 producing CD8+ T lymphocytes and lower proportion of plasma cells when compared to the rheumatoid synovium. The amount of synovium IL17+ CD8+ T cells correlates positively to measures of disease activity. Lymphoid follicles with characteristics of germinal centers have been identified, similar to the ones described in RA. Neoangiogenesis is more prominent in PsA but can also be an outstanding feature in some RA samples, and different molecules involved in the process appear to have different influence in each disease. IL-17 and IL-22 expression in the synovium does not allow depiction between diseases. Among other cytokines and molecules likely implicated in disease physiopathology, only IL-35 is demonstrated to be reduced in PsA when compared to RA.
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Affiliation(s)
- Catarina Tenazinha
- Department of Rheumatology and Metabolic Bone Diseases, Hospital de Santa Maria, Centro Hospitalar Universitàrio de Lisboa-Norte, Lisbon, Portugal
- Rheumatology Research Unit, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Lisbon Academic Medical Center, Universidade de Lisboa, Lisbon, Portugal
- *Correspondence: Catarina Tenazinha,
| | - Rita Barros
- Department of Rheumatology and Metabolic Bone Diseases, Hospital de Santa Maria, Centro Hospitalar Universitàrio de Lisboa-Norte, Lisbon, Portugal
| | - João Eurico Fonseca
- Department of Rheumatology and Metabolic Bone Diseases, Hospital de Santa Maria, Centro Hospitalar Universitàrio de Lisboa-Norte, Lisbon, Portugal
- Rheumatology Research Unit, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Lisbon Academic Medical Center, Universidade de Lisboa, Lisbon, Portugal
| | - Elsa Vieira-Sousa
- Department of Rheumatology and Metabolic Bone Diseases, Hospital de Santa Maria, Centro Hospitalar Universitàrio de Lisboa-Norte, Lisbon, Portugal
- Rheumatology Research Unit, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Lisbon Academic Medical Center, Universidade de Lisboa, Lisbon, Portugal
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5
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Ingegnoli F, Coletto LA, Scotti I, Compagnoni R, Randelli PS, Caporali R. The Crucial Questions on Synovial Biopsy: When, Why, Who, What, Where, and How? Front Med (Lausanne) 2021; 8:705382. [PMID: 34422862 PMCID: PMC8377390 DOI: 10.3389/fmed.2021.705382] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/07/2021] [Indexed: 11/13/2022] Open
Abstract
In the majority of joint diseases, changes in the organization of the synovial architecture appear early. Synovial tissue analysis might provide useful information for the diagnosis, especially in atypical and rare joint disorders, and might have a value in case of undifferentiated inflammatory arthritis, by improving disease classification. After patient selection, it is crucial to address the dialogue between the clinician and the pathologist for adequately handling the sample, allowing identifying histological patterns depending on the clinical suspicion. Moreover, synovial tissue analysis gives insight into disease progression helping patient stratification, by working as an actionable and mechanistic biomarker. Finally, it contributes to an understanding of joint disease pathogenesis holding promise for identifying new synovial biomarkers and developing new therapeutic strategies. All of the indications mentioned above are not so far from being investigated in everyday clinical practice in tertiary referral hospitals, thanks to the great feasibility and safety of old and more recent techniques such as ultrasound-guided needle biopsy and needle arthroscopy. Thus, even in rheumatology clinical practice, pathobiology might be a key component in the management and treatment decision-making process. This review aims to examine some essential and crucial points regarding why, when, where, and how to perform a synovial biopsy in clinical practice and research settings and what information you might expect after a proper patient selection.
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Affiliation(s)
- Francesca Ingegnoli
- Division of Clinical Rheumatology, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Department of Clinical Sciences & Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, Research Center for Environmental Health, Università degli Studi di Milano, Milano, Italy
| | - Lavinia Agra Coletto
- Division of Clinical Rheumatology, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Department of Clinical Sciences & Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, Research Center for Environmental Health, Università degli Studi di Milano, Milano, Italy
| | - Isabella Scotti
- Division of Clinical Rheumatology, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Department of Clinical Sciences & Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, Research Center for Environmental Health, Università degli Studi di Milano, Milano, Italy
| | - Riccardo Compagnoni
- 1° Clinica Ortopedica, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milano, Italy
| | - Pietro Simone Randelli
- 1° Clinica Ortopedica, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Laboratory of Applied Biomechanics, Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milano, Italy
| | - Roberto Caporali
- Division of Clinical Rheumatology, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.,Department of Clinical Sciences & Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, Research Center for Environmental Health, Università degli Studi di Milano, Milano, Italy
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6
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Ike RW, Kalunian KC. Will rheumatologists ever pick up the arthroscope again? Int J Rheum Dis 2021; 24:1235-1246. [PMID: 34323382 DOI: 10.1111/1756-185x.14184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/26/2021] [Accepted: 07/12/2021] [Indexed: 02/04/2023]
Abstract
Conditions prompting physicians and surgeons first adapting endoscopes to peer into joints were mainly the sort of synovial conditions that would concern today's rheumatologists. Rheumatologists were among the pre-World War II pioneers developing and documenting arthroscopy. The post-War father of modern arthroscopy, Watanabe, found rheumatologists among his early students, who took back the technique to their home countries, teaching orthopedists and rheumatologists alike. Rheumatologists described and analyzed the intra-articular features of their common diseases in the '60s and '70s. A groundswell of interest from academic rheumatologists in adapting arthroscopy grew considerably in the '90s with development of "needle scopes" that could be used in an office setting. Rheumatologists helped conduct the very trials the findings of which reduced demand for their arthroscopic services by questioning the efficacy of arthroscopic debridement in osteoarthritis (OA) and also developing biological compounds that greatly reduced the call for any resective intervention in inflammatory arthropathies. The arthroscope has proven an excellent tool for viewing and sampling synovium and continues to serve this purpose at several international research centers. While cartilage is now imaged mainly by magnetic resonance imaging, some OA features - such as a high prevalence of visible calcinosis - beg further arthroscopy-directed investigation. A new generation of "needle scopes" with far superior optics awaits future investigators, should they develop interest.
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Affiliation(s)
- Robert W Ike
- Department of Internal Medicine, Division of Rheumatology, University of Michigan Health System, Ann Arbor, MI, USA
| | - Kenneth C Kalunian
- Department of Medicine, Division of Rheumatology, Allergy and Immunology, University of California at San Diego, San Diego, CA, USA
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7
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Cuervo A, Celis R, Julià A, Usategui A, Faré R, Ramírez J, Azuaga AB, Lorenzo A, Sanmartí R, Pablos JL, Cañete JD. Synovial Immunohistological Biomarkers of the Classification of Undifferentiated Arthritis Evolving to Rheumatoid or Psoriatic Arthritis. Front Med (Lausanne) 2021; 8:656667. [PMID: 33898490 PMCID: PMC8062857 DOI: 10.3389/fmed.2021.656667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/15/2021] [Indexed: 12/17/2022] Open
Abstract
Background: Undifferentiated arthritis (UA) is defined as an inflammatory arthritis that does not fulfill criteria for a definite diagnosis. Delay in reaching a specific diagnostic and therapy may lead to impaired functional outcomes. Our aim was to identify synovial biomarkers associated with definitive diagnostic classification in patients with UA. Methods: DMARD-naïve UA patients with available initial synovial tissue (ST) and a final diagnosis of rheumatoid arthritis (RA) or psoriatic arthritis (PsA) during follow-up were included and compared with patients with well-defined disease (RA or PsA). Clinical, arthroscopic, and pathological data were compared between groups. Pathology included quantitative immunohistochemical (IHC) analysis of cell types and human interferon-regulated MxA. Principal component analysis (PCA) was performed to extract disease patterns. Results: One hundred and five patients were included: 31 patients with DMARD-naïve UA (19 evolving to RA and 12 to PsA during a median follow up of 7 years), 39 with established RA, and 35 with established PsA. ST from the UA group showed higher macrophage density compared with the established RA and PsA groups. Patients with UA evolving to RA (UA-RA) showed higher MxA expression and CD3+ T-cell density compared with established RA. UA patients evolving to PsA (UA-PsA) showed increased vascularity and lining synovial fibroblast density compared with established PsA. Synovitis of UA-PsA patients showed more mast cells and lining fibroblasts compared with UA-RA. No between-group differences in local or systemic inflammation markers were found. Conclusions: Our results show differences in the cellular composition of UA synovium compared with RA and PsA, with higher density of the cellular infiltrate in the UA groups. Initial expression of the interferon inducible gene MxA could be a biomarker of progression to RA, while higher mast cell and fibroblastic density may be associated with PsA progression.
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Affiliation(s)
- Andrea Cuervo
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
| | - Raquel Celis
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
| | - Antonio Julià
- Rheumatology Research Group, Vall d'Hebron Research Institute, Barcelona, Spain
| | - Alicia Usategui
- Department of Rheumatology, Research Institute Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain
| | - Regina Faré
- Department of Rheumatology, Research Institute Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain
| | - Julio Ramírez
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
| | - Ana Belen Azuaga
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
| | - Andrés Lorenzo
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain.,Rheumatology Division, Hospital Universitario de Burgos, Burgos, Spain
| | - Raimon Sanmartí
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
| | - José L Pablos
- Department of Rheumatology, Research Institute Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain
| | - Juan D Cañete
- Arthritis Unit, Department of Rheumatology, Hospital Clínic, University of Barcelona and Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
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8
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Kaaij MH, van Tok MN, Blijdorp IC, Ambarus CA, Stock M, Pots D, Knaup VL, Armaka M, Christodoulou-Vafeiadou E, van Melsen TK, Masdar H, Eskes HJPP, Yeremenko NG, Kollias G, Schett G, Tas SW, van Duivenvoorde LM, Baeten DLP. Transmembrane TNF drives osteoproliferative joint inflammation reminiscent of human spondyloarthritis. J Exp Med 2021; 217:151943. [PMID: 32662821 PMCID: PMC7537402 DOI: 10.1084/jem.20200288] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 12/12/2022] Open
Abstract
TNF plays a key role in immune-mediated inflammatory diseases including rheumatoid arthritis (RA) and spondyloarthritis (SpA). It remains incompletely understood how TNF can lead to different disease phenotypes such as destructive peripheral polysynovitis in RA versus axial and peripheral osteoproliferative inflammation in SpA. We observed a marked increase of transmembrane (tm) versus soluble (s) TNF in SpA versus RA together with a decrease in the enzymatic activity of ADAM17. In contrast with the destructive polysynovitis observed in classical TNF overexpression models, mice overexpressing tmTNF developed axial and peripheral joint disease with synovitis, enthesitis, and osteitis. Histological and radiological assessment evidenced marked endochondral new bone formation leading to joint ankylosis over time. SpA-like inflammation, but not osteoproliferation, was dependent on TNF-receptor I and mediated by stromal tmTNF overexpression. Collectively, these data indicate that TNF can drive distinct inflammatory pathologies. We propose that tmTNF is responsible for the key pathological features of SpA.
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Affiliation(s)
- Merlijn H Kaaij
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Melissa N van Tok
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Iris C Blijdorp
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Carmen A Ambarus
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Michael Stock
- Medizinische Klinik 3 - Rheumatologie und Immunologie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Désiree Pots
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Véronique L Knaup
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Marietta Armaka
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming," Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Tessa K van Melsen
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Huriatul Masdar
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Harry J P P Eskes
- Department of Radiology, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Nataliya G Yeremenko
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - George Kollias
- Division of Immunology, Biomedical Sciences Research Center "Alexander Fleming," Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Georg Schett
- Medizinische Klinik 3 - Rheumatologie und Immunologie, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sander W Tas
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Leonie M van Duivenvoorde
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Dominique L P Baeten
- Amsterdam Rheumatology and Immunology Center, Department of Clinical Immunology and Rheumatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
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9
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Ike RW, Arnold WJ, Kalunian KC. Arthroscopy in rheumatology: where have we been? Where might we go? Rheumatology (Oxford) 2020; 60:518-528. [DOI: 10.1093/rheumatology/keaa560] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/15/2020] [Accepted: 07/31/2020] [Indexed: 12/12/2022] Open
Abstract
Abstract
The aim of our manuscript is to illustrate the past, present and future role of rheumatologists performing arthroscopy. Doctors first began adapting endoscopes to inspect joints to assess synovial conditions that concern rheumatologists. Rheumatologists were among the pioneers developing arthroscopy. Students of the father of modern arthroscopy, Watanabe, included rheumatologists, who taught others once home. Rheumatologists assessed the intra-articular features of their common diseases in the 60s and 70s. Improvements in instrumentation and efforts by a few orthopaedists adapted a number of common joint surgical procedures for arthroscopy. Interest from rheumatologists in arthroscopy grew in the 90s with ‘needle scopes’ used in an office setting. Rheumatologists conducting the first prospective questioning arthroscopic debridement in OA and developing biological compounds reduced the call for arthroscopic interventions. The arthroscope has proven an excellent tool for viewing and sampling synovium, which continues to at several international centres. Some OA features—such as calcinosis—beg further arthroscopic investigation. A new generation of ‘needle scopes’ with far superior optics awaits future investigators.
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Affiliation(s)
- Robert W Ike
- Division of Rheumatology, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI, USA
| | - William J Arnold
- Orthopaedics and Rheumatology of the North Shore, Wilmette, IL, USA
| | - Kenneth C Kalunian
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California at San Diego, San Diego, CA, USA
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10
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Hakim MA, Christensen B, Ahn DY, McCain JP. Correlation of Arthroscopic and Histologic Findings in Synovial Membrane Disease of the Temporomandibular Joint. J Oral Maxillofac Surg 2020; 78:1297-1303. [DOI: 10.1016/j.joms.2020.03.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 03/16/2020] [Accepted: 03/23/2020] [Indexed: 01/17/2023]
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11
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Manzo A, Bugatti S, Rossi S. Clinical Applications of Synovial Biopsy. Front Med (Lausanne) 2019; 6:102. [PMID: 31134204 PMCID: PMC6524205 DOI: 10.3389/fmed.2019.00102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/25/2019] [Indexed: 11/13/2022] Open
Abstract
The synovial tissue is a primary target of multiple diseases characterized by different pathogenic mechanisms, including infective, deposition, neoplastic, and chronic immune-inflammatory pathologies. Synovial biopsy can have a relevant role in differential diagnosis of specific conditions in clinical practice, although its exploitation remains relatively limited. In particular, no validated synovial-tissue-derived biomarkers are currently available in the clinic to aid in the diagnosis and management in most frequent forms of chronic inflammatory arthropathies, namely rheumatoid arthritis (RA) and the spondyloarthritides (SpA). In this brief review, we will discuss the current spectrum of clinical applications of synovial biopsy in routine rheumatologic care and will provide an analysis of the perspectives for its potential exploitation in patients with chronic inflammatory arthritides.
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Affiliation(s)
- Antonio Manzo
- Rheumatology and Translational Immunology Research Laboratories, Division of Rheumatology, IRCCS Policlinico San Matteo Foundation, University of Pavia, Pavia, Italy
| | - Serena Bugatti
- Rheumatology and Translational Immunology Research Laboratories, Division of Rheumatology, IRCCS Policlinico San Matteo Foundation, University of Pavia, Pavia, Italy
| | - Silvia Rossi
- Rheumatology and Translational Immunology Research Laboratories, Division of Rheumatology, IRCCS Policlinico San Matteo Foundation, University of Pavia, Pavia, Italy
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12
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Celis R, Cuervo A, Ramírez J, Cañete JD. Psoriatic Synovitis: Singularity and Potential Clinical Implications. Front Med (Lausanne) 2019; 6:14. [PMID: 30805340 PMCID: PMC6378889 DOI: 10.3389/fmed.2019.00014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 01/17/2019] [Indexed: 12/13/2022] Open
Abstract
Psoriatic arthritis (PsA) is an immuno-inflammatory disease with a heterogeneous clinical presentation as affects musculoskeletal tissues (arthritis, enthesitis, spondylitis), skin (psoriasis) and, less frequently, eye (uveitis) and bowel (inflammatory bowel disease). It has been suggested that distinct affected tissues could exhibit different immune-inflammatory pathways so complicating the understanding of the physiopathology of psoriatic disease as well as its treatment. Despite of the key pathogenic and clinical relevance that enthesitis has in PsA, peripheral arthritis is more easily perceived. At the macroscopic level, PsA synovitis has predominantly tortuous, bushy vessels, whereas rheumatoid arthritis (RA) is characterized by mainly straight, branching vessels so reflecting prominent neo-angiogenesis in PsA. Synovial biopsies have demonstrated a similar cellular and molecular picture in PsA and RA, although some differences have been reported at the group level, as higher density of vessels, CD163+ macrophages, neutrophils and mast cells in PsA. In fact, synovial IL-17+ mast cells are significantly increased in PsA and produce more IL-17A compared with RA, and a proof of concept study supports its relevant role in the synovitis of SpA, included PsA. As firstly reported in RA, synovial lymphoid neogenesis is found also in the same proportion of PsA as in RA patients, despite the lack of autoantibodies in PsA. These lymphoid structures are associated with activation of the IL-23/Th17 pathway in RA and seemly in PsA, which could be useful to stratify RA patients. Immunohistochemical and transcriptomic methodologies have still not found synovial biomarkers useful to distinguish psoriatic from rheumatoid synovitis at the patient level. However, modern methodologies, as MALDI-Mass Spectrometry Imaging, applied to the study of synovial tissue have revealed metabolic and lipid signatures which could support clinical decision-making in the diagnosis of PsA and RA and to go further toward the personalized medicine.
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Affiliation(s)
| | | | | | - Juan D. Cañete
- Arthritis Unit, Rheumatology Department of Hospital Clinic and IDIBAPS, Barcelona, Spain
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13
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Long NP, Park S, Anh NH, Min JE, Yoon SJ, Kim HM, Nghi TD, Lim DK, Park JH, Lim J, Kwon SW. Efficacy of Integrating a Novel 16-Gene Biomarker Panel and Intelligence Classifiers for Differential Diagnosis of Rheumatoid Arthritis and Osteoarthritis. J Clin Med 2019; 8:E50. [PMID: 30621359 PMCID: PMC6352223 DOI: 10.3390/jcm8010050] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 12/20/2018] [Accepted: 01/02/2019] [Indexed: 12/15/2022] Open
Abstract
Introducing novel biomarkers for accurately detecting and differentiating rheumatoid arthritis (RA) and osteoarthritis (OA) using clinical samples is essential. In the current study, we searched for a novel data-driven gene signature of synovial tissues to differentiate RA from OA patients. Fifty-three RA, 41 OA, and 25 normal microarray-based transcriptome samples were utilized. The area under the curve random forests (RF) variable importance measurement was applied to seek the most influential differential genes between RA and OA. Five algorithms including RF, k-nearest neighbors (kNN), support vector machines (SVM), naïve-Bayes, and a tree-based method were employed for the classification. We found a 16-gene signature that could effectively differentiate RA from OA, including TMOD1, POP7, SGCA, KLRD1, ALOX5, RAB22A, ANK3, PTPN3, GZMK, CLU, GZMB, FBXL7, TNFRSF4, IL32, MXRA7, and CD8A. The externally validated accuracy of the RF model was 0.96 (sensitivity = 1.00, specificity = 0.90). Likewise, the accuracy of kNN, SVM, naïve-Bayes, and decision tree was 0.96, 0.96, 0.96, and 0.91, respectively. Functional meta-analysis exhibited the differential pathological processes of RA and OA; suggested promising targets for further mechanistic and therapeutic studies. In conclusion, the proposed genetic signature combined with sophisticated classification methods may improve the diagnosis and management of RA patients.
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Affiliation(s)
- Nguyen Phuoc Long
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Seongoh Park
- Department of Statistics, Seoul National University, Seoul 08826, Korea.
| | - Nguyen Hoang Anh
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Jung Eun Min
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Sang Jun Yoon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Hyung Min Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Tran Diem Nghi
- School of Medicine, Vietnam National University, Ho Chi Minh 700000, Vietnam.
| | - Dong Kyu Lim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Jeong Hill Park
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
| | - Johan Lim
- Department of Statistics, Seoul National University, Seoul 08826, Korea.
| | - Sung Won Kwon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Korea.
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Coiffier G, Ferreyra M, Albert JD, Stock N, Jolivet-Gougeon A, Perdriger A, Guggenbuhl P. Ultrasound-guided synovial biopsy improves diagnosis of septic arthritis in acute arthritis without enough analyzable synovial fluid: a retrospective analysis of 176 arthritis from a French rheumatology department. Clin Rheumatol 2018; 37:2241-2249. [DOI: 10.1007/s10067-018-4160-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 05/20/2018] [Accepted: 05/24/2018] [Indexed: 12/25/2022]
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15
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Koushik S, Joshi N, Nagaraju S, Mahmood S, Mudeenahally K, Padmavathy R, Jegatheesan SK, Mullangi R, Rajagopal S. PAD4: pathophysiology, current therapeutics and future perspective in rheumatoid arthritis. Expert Opin Ther Targets 2017; 21:433-447. [PMID: 28281906 DOI: 10.1080/14728222.2017.1294160] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Peptidyl arginine deiminase 4 (PAD4) is an enzyme that plays an important role in gene expression, turning out genetic code into functional products in the body. It is involved in a key post translational modification, which involves the conversion of arginine to citrulline. It regulates various processes such as apoptosis, innate immunity and pluripotency, while its dysregulation has a great impact on the genesis of various diseases. Over the last few years PAD4 has emerged as a potential therapeutic target for the treatment of rheumatoid arthritis (RA). Areas covered: In this review, we discuss the basic structure and function of PAD4, along with the role of altered PAD4 activity in the onset of RA and other maladies. We also elucidate the role of PAD4 variants in etiology of RA among several ethnic groups and the current pre-clinical inhibitors to regulate PAD4. Expert opinion: Citrullination has a crucial role in RA and several other disorders. Since PAD4 is an initiator of the citrullination, it is an important therapeutic target for inflammatory diseases. Therefore, an in depth knowledge of the roles and activity of PAD4 is required to explore more effective ways to conquer PAD4 related ailments, especially RA.
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Affiliation(s)
- Sindhu Koushik
- a Bioinformatics , Jubilant Biosys Ltd ., Bangalore , India
| | - Nivedita Joshi
- a Bioinformatics , Jubilant Biosys Ltd ., Bangalore , India
| | | | - Sameer Mahmood
- a Bioinformatics , Jubilant Biosys Ltd ., Bangalore , India
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Turina MC, Landewé R, Baeten D. Lessons to be learned from serum biomarkers in psoriasis and IBD – the potential role in SpA. Expert Rev Clin Immunol 2016; 13:333-344. [DOI: 10.1080/1744666x.2017.1244004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Maureen C. Turina
- Department of Clinical Immunology and Rheumatology, Amsterdam Rheumatology and immunology Center, Academic Medical Center/University of Amsterdam, Amsterdam, The Netherlands
| | - Robert Landewé
- Department of Clinical Immunology and Rheumatology, Amsterdam Rheumatology and immunology Center, Academic Medical Center/University of Amsterdam, Amsterdam, The Netherlands
| | - Dominique Baeten
- Department of Clinical Immunology and Rheumatology, Amsterdam Rheumatology and immunology Center, Academic Medical Center/University of Amsterdam, Amsterdam, The Netherlands
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17
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Laria A, Lurati A, Marrazza M, Mazzocchi D, Re KA, Scarpellini M. The macrophages in rheumatic diseases. J Inflamm Res 2016; 9:1-11. [PMID: 26929657 PMCID: PMC4755472 DOI: 10.2147/jir.s82320] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Macrophages belong to the innate immune system giving us protection against pathogens. However it is known that they are also involved in rheumatic diseases. Activated macrophages have two different phenotypes related to different stimuli: M1 (classically activated) and M2 (alternatively activated). M1 macrophages release high levels of pro-inflammatory cytokines, reactive nitrogen and oxygen intermediates killing microorganisms and tumor cells; while M2 macrophages are involved in resolution of inflammation through phagocytosis of apoptotic neutrophils, reduced production of pro-inflammatory cytokines, and increased synthesis of mediators important in tissue remodeling, angiogenesis, and wound repair. The role of macrophages in the different rheumatic diseases is different according to their M1/M2 macrophages phenotype.
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18
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van de Sande MG, Baeten DL. Immunopathology of synovitis: from histology to molecular pathways. Rheumatology (Oxford) 2015; 55:599-606. [PMID: 26359330 DOI: 10.1093/rheumatology/kev330] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Indexed: 11/13/2022] Open
Abstract
Increased knowledge about pathological processes active in inflammatory joint diseases is needed to initiate personalized medicine based on targeted treatments in the future. The molecular and cellular pathways that are active during joint inflammation may differ between the various inflammatory joint diseases, between different patient subgroups within one disease, or even between different stages of the disease in a single patient. In this review, we evaluate synovial inflammation in terms of descriptive histopathology through to more functional studies on human synovial tissue inflammation in RA and SpA, in phenotypic subgroups of RA and SpA patients, and during the disease course of both diseases.
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Affiliation(s)
- Marleen G van de Sande
- Amsterdam Rheumatology & Immunology Center, Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Dominique L Baeten
- Amsterdam Rheumatology & Immunology Center, Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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19
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Turina MC, Yeremenko N, Paramarta JE, De Rycke L, Baeten D. Calprotectin (S100A8/9) as serum biomarker for clinical response in proof-of-concept trials in axial and peripheral spondyloarthritis. Arthritis Res Ther 2014; 16:413. [PMID: 25135077 PMCID: PMC4293104 DOI: 10.1186/s13075-014-0413-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 07/25/2014] [Indexed: 02/07/2023] Open
Abstract
Introduction Biomarkers complementing clinical evaluations may help to reduce the length and size of proof-of-concept (PoC) trials aimed to obtain quick “go/no go” decisions in the clinical development of new treatments. We aimed to identify and validate serum biomarkers with a high sensitivity to change upon effective treatment in spondyloarthritis (SpA) PoC trials. Methods The candidate biomarkers high-sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6), pentraxin-3 (PTX-3), alpha-2-macroglobulin (alpha-2-MG), matrix metalloproteinase-3 (MMP-3), calprotectin, and vascular endothelial growth factor (VEGF) were determined by enzyme-linked immunosorbent assay (ELISA) in healthy controls (n = 20) and SpA patients before and after 2 weeks of infliximab (n = 18) or placebo (n = 19) treatment in cohort 1. Clinical outcome was evaluated at week 12. Results were validated in ankylosing spondylitis (AS) with infliximab (cohort 2, n = 21) and peripheral SpA with etanercept (cohort 3, n = 20). Results Serum levels of calprotectin, hs-CRP, PTX-3, VEGF (all P < 0.001) and MMP-3 (P = 0.062), but not IL-6 and alpha-2-MG, were increased in SpA versus healthy controls. Treatment with infliximab, but not placebo, significantly decreased calprotectin (P < 0.001) and hs-CRP (P < 0.001) levels, with a similar trend for MMP-3 (P = 0.063). The standardized response mean (SRM), which reflects the ability to detect changes over time, was high for calprotectin (−1.26), good for hs-CRP (−0.96) and moderate for MMP-3 (−0.52). Calprotectin and hs-CRP, but not MMP-3, were good biomarkers for treatment response in axial and peripheral SpA as evaluated and confirmed in cohort 2 and 3 respectively. Conclusions Calprotectin and hs-CRP are good serum biomarkers with high sensitivity to change upon effective treatment at the group level in small-scale, short term PoC trials in SpA.
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20
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Ranatunga S, Miller AV. Active axial spondyloarthritis: potential role of certolizumab pegol. Ther Clin Risk Manag 2014; 10:87-94. [PMID: 24611014 PMCID: PMC3928401 DOI: 10.2147/tcrm.s53675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The axial spondyloarthropathies are a group of chronic inflammatory diseases that predominantly affect the axial joints. This group includes ankylosing spondylitis and nonradiographic axial spondyloarthropathy. While the pathogenesis of axial spondyloarthropathies is not clear, immunologically active tissues primarily include the entheses, ie, the areas where ligaments, tendons, and joint capsules attach to bone and to the annulus fibrosis at the vertebrae. One of the major mediators of the immune response in this group of diseases is tumor necrosis factor-alpha (TNFα). Blockade of TNFα results in reduced vascularity and inflammatory cell infiltration in the synovial tissues of affected joints. Certolizumab pegol (CZP) is an Fc-free, PEGylated anti-TNFα monoclonal antibody. CZP has unique properties that differ from other available TNFα inhibitors by virtue of its lack of an Fc region, which minimizes potential Fc-mediated effects, and its PEGylation, which improves drug pharmacokinetics and bioavailability. It has been shown in clinical trials that CZP improves patient outcomes and reduces inflammation in the sacroiliac joints and spine in both ankylosing spondylitis and nonradiographic axial spondyloarthropathies. These data support CZP as a treatment option for axial spondyloarthropathies.
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Affiliation(s)
- Sriya Ranatunga
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Anne V Miller
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, USA
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21
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Barrett C, Bird P, Major G, Romas E, Portek I, Taylor A, Zochling J. Australian and New Zealand national evidence-based recommendations for the investigation and follow-up of undifferentiated peripheral inflammatory arthritis: an integration of systematic literature research and rheumatological expert opinion. Int J Rheum Dis 2013; 16:637-51. [PMID: 24131599 DOI: 10.1111/1756-185x.12189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To develop Australian and New Zealand (ANZ) recommendations for the investigation and follow-up of undifferentiated peripheral inflammatory arthritis (UPIA) using an evidence-based approach. METHODS Ten questions pertaining to the investigation and follow-up of patients with UPIA in daily rheumatological practice were defined by clinicians using a modified Delphi approach. A systematic literature search was conducted for each of the final questions. The results were presented to a workshop of 54 ANZ rheumatologists in May 2009. Discussions were held to develop consensus statements for each question, based on published evidence and clinical experience/expertise. RESULTS Ten recommendations were made on diagnostic value of clinical features in the patient's history and examination, predictors of poor prognosis and persistence, synovial fluid analysis, serology, imaging and human leukocyte antigen B27 testing. The lack of specific research to inform recommendations presented a challenge. Dynamic discussion groups outlined individual experience in areas without good quality clinical trial evidence. The median strength of support for the final set of recommendations was 7/10 (interquartile range 6-8), ranging from 6 to 9 for individual statements. CONCLUSION Ten ANZ recommendations for the investigation and follow-up of UPIA were formulated, based on available evidence and extensive clinical experience. The systematic literature review was of limited value while animated discussion of individual experience, with subsequent information exchange, highlighted the importance of merging clinical expertise with published literature to establish practical recommendations that can improve quality of care in rheumatology.
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Affiliation(s)
- Claire Barrett
- Private Rheumatology Practice, Redcliffe, Queensland, Australia
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22
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Baeten D, Breban M, Lories R, Schett G, Sieper J. Are spondylarthritides related but distinct conditions or a single disease with a heterogeneous phenotype? ACTA ACUST UNITED AC 2013; 65:12-20. [PMID: 23288559 DOI: 10.1002/art.37829] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 07/05/2012] [Indexed: 01/11/2023]
Affiliation(s)
- Dominique Baeten
- Academic Medical Center and University of Amsterdam, Amsterdam, The Netherlands.
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23
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Fiocco U, Sfriso P, Oliviero F, Lunardi F, Calabrese F, Scagliori E, Cozzi L, Di Maggio A, Nardacchione R, Molena B, Felicetti M, Gazzola K, Stramare R, Rubaltelli L, Accordi B, Costa L, Roux-Lombard P, Punzi L, Dayer JM. Blockade of intra-articular TNF in peripheral spondyloarthritis: Its relevance to clinical scores, quantitative imaging and synovial fluid and synovial tissue biomarkers. Joint Bone Spine 2013; 80:165-70. [DOI: 10.1016/j.jbspin.2012.06.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 06/27/2012] [Indexed: 11/16/2022]
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van Duivenvoorde LM, Dorris ML, Satumtira N, van Tok MN, Redlich K, Tak PP, Taurog JD, Baeten DL. Relationship between inflammation, bone destruction, and osteoproliferation in the HLA-B27/human β2 -microglobulin-transgenic rat model of spondylarthritis. ACTA ACUST UNITED AC 2013; 64:3210-9. [PMID: 22736144 DOI: 10.1002/art.34600] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Inhibition of inflammation and destruction, but not of osteoproliferation, in patients with spondylarthritis (SpA) treated with anti-tumor necrosis factor raises the question of how these three processes are interrelated. This study was undertaken to analyze this relationship in a rat model of SpA. METHODS Histologic spine and joint samples from HLA-B27/human β(2) -microglobulin (hβ(2) m)-transgenic rats were analyzed for signs of spondylitis and destructive arthritis and semiquantitatively scored as showing mild, moderate, or severe inflammation. RESULTS In rats exhibiting spondylitis, mildly inflamed sections displayed lymphocyte infiltration in connective tissue adjacent to the junction of the anulus fibrosus and vertebral bone but not at the enthesis. Moderately inflamed tissue samples contained osteoclasts eroding bone outside the cartilage end plate. In sections from rats with severe inflammation, the cartilage end plate and underlying bone marrow were also affected. End-stage disease was characterized by complete destruction of the intervertebral disc and vertebrae, with ongoing infiltration. Osteoproliferation was not observed in samples from rats with no or mild inflammation, but was present at the edge of the vertebrae in sections with moderate inflammation and persisted during severe inflammation and end-stage destruction. Osteoproliferation occurred at the border of inflammation, at a distance from bone destruction. A strong correlation between the extent of inflammation, destruction, and osteoproliferation was observed. Sections from rats with arthritis displayed a similar pattern of synovial inflammation associated with bone destruction, and simultaneous but topographically distinct osteoproliferation starting from the periosteum. CONCLUSION SpA in B27/hβ(2) m-transgenic rats is characterized by destructive inflammatory pannus tissue rather than by enthesitis or osteitis. Destruction and osteoproliferation occur simultaneously but at distinct sites in joints with moderate to severe inflammation.
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25
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Yeremenko N, Noordenbos T, Cantaert T, van Tok M, van de Sande M, Cañete JD, Tak PP, Baeten D. Disease-specific and inflammation-independent stromal alterations in spondylarthritis synovitis. ACTA ACUST UNITED AC 2012; 65:174-85. [PMID: 22972410 DOI: 10.1002/art.37704] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 09/06/2012] [Indexed: 12/19/2022]
Affiliation(s)
- Nataliya Yeremenko
- Department of Clinical Immunology and Rheumatology, Academic Medical Center and University of Amsterdam, Amsterdam, The Netherlands
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Singhal O, Kaur V, Kalhan S, Singhal MK, Gupta A, Machave YV. Arthroscopic synovial biopsy in definitive diagnosis of joint diseases: An evaluation of efficacy and precision. Int J Appl Basic Med Res 2012; 2:102-6. [PMID: 23776821 PMCID: PMC3678688 DOI: 10.4103/2229-516x.106351] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
CONTEXT Arthritis is an important cause of morbidity, presenting as monoarticular or polyarticular lesion. Arthroscopic synovial aspiration and biopsy can help in arriving specific etiological diagnosis. AIM AND OBJECTIVES To evaluate the efficacy of arthroscopic synovial biopsy as a diagnostic aid and study the characteristics of synovial fluid in various joint diseases. MATERIALS AND METHODS Arthroscopic synovial biopsy along with synovial fluid analysis was studied in 30 of the 50 enrolled cases arthritis. The fluid was subjected to physical, biochemical, and cytological analysis. RESULTS Both rheumatoid (n = 14, 28%) and tubercular (n = 13, 26%) arthritis were found to be more common compared to other etiologies. Next common etiology observed was chronic nonspecific synovitis (n = 10, 20%). Clinicopathological correlation was seen in 34 out of 50 cases. As a diagnostic tool, synovial biopsy had a sensitivity of 85%, specificity of 100%, positive predictive value of 100%, and negative predictive value of 62%. CONCLUSION Arthroscopic synovial biopsy is a simple and easy to perform technique and is an important useful investigative adjunct that may give conclusive diagnosis where clinical diagnosis is equivocal.
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Affiliation(s)
- Onis Singhal
- Department of Pathology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, India
| | - Viplesh Kaur
- Department of Pathology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, India
| | - Shivani Kalhan
- Department of Pathology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, India
| | - Manish Kumar Singhal
- Department of Pathology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, India
| | - Anshu Gupta
- Department of Pathology, Saraswathi Institute of Medical Sciences, Hapur, Uttar Pradesh, India
| | - YV Machave
- Department of Pathology, Bharati Vidyapeeth University, Pune, Maharashtra, India
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Appel H, Braun J. Synovitis in spondyloarthritides. Open Rheumatol J 2012; 5:123-6. [PMID: 22279511 PMCID: PMC3263467 DOI: 10.2174/1874312901105010123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Revised: 09/27/2011] [Accepted: 10/03/2011] [Indexed: 12/04/2022] Open
Abstract
Recent studies using magnetic resonance imaging have suggested that the subchondral bone marrow and the entheses are the sites which are primarily involved in the peripheral and axial inflammation found in patients with spondyloarthritides. Histopathological analyses indicated that the typical morphological features at these sites reflect an inflammation (osteitis) at the bone cartilage interface and in the subchondral bone marrow. This finding implies that synovitis may be of minor importance, especially in comparison to other inflammatory joint diseases such as rheumatoid arthritis. Here, we summarize current available knowledge on synovial involvement in inflammatory processes related to SpA.
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Affiliation(s)
- Heiner Appel
- Charité Berlin, Campus Benjamin Franklin, Department of Gastroenterology, Infectiology and Rheumatology, Germany
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Paramarta JE, Baeten D, De Rycke L. Synovial Tissue Response to Treatment with TNF Blockers in Peripheral Spondyloarthritis. Open Rheumatol J 2011; 5:127-32. [PMID: 22279512 PMCID: PMC3263444 DOI: 10.2174/1874312901105010127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Revised: 10/03/2011] [Accepted: 10/10/2011] [Indexed: 12/17/2022] Open
Abstract
This review describes the synovial response to treatment in peripheral spondyloarthritis (SpA). A series of recent studies demonstrates that the synovial histopathology is largely homogenous between different SpA subtypes and can be strongly modulated by effective treatment such as tumor necrosis factor (TNF) blockade. This includes a dramatic reduction of the infiltration with inflammatory cells (with the intriguing exception of B lymphocytes and plasma cells), a modulation of structural features such as vascularity, intimal lining layer hyperplasia, and ectopic lymphoid neogenesis, and a down-regulation of a variety of mediators involved in tissue damage. The analysis of tissue response to targeted therapies appears to be a novel and elegant approach to study the immunopathology of human peripheral SpA in vivo. Moreover, detailed cellular and molecular analysis of synovial features allows to identify synovial biomarkers of clinical response to therapeutic interventions which can be used in future early phase clinical trials in SpA.
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Affiliation(s)
- Jacqueline E Paramarta
- Department of Clinical Immunology and Rheumatology, Academic Medical Center/University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
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Abstract
The study of biomarkers has become a very important field of research in spondyloarthropathy. Biomarkers are useful for different aspects of the disease such as diagnosis, assessment of disease activity and outcome, including damage. The most commonly used biomarkers in spondyloarthropathies are HLA-B27 for diagnosis and erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) for disease activity. HLA-B27 is very sensitive but has a low specificity. ESR and CRP have both low sensitivity and specificity. The introduction of new and very expensive therapies is another reason for analysis of biomarkers. Clinicians need tools to predict more accurately disease activity, disease progression and response to therapy. This article focusses on the several known and new biomarkers of promise, including markers for cartilage and bone damage, and discusses some of the problems encountered during the search and development of new biomarkers. Biomarkers, soluble and tissue-related, reflecting structural damage and disease activity, constitute a high priority for the drug discovery process and the understanding of the pathogenesis of a particular disease. The identification of relevant tools to evaluate the natural course, disease activity, treatment response and outcome of ankylosing spondylitis is of increasing relevance since the raised awareness and development of new therapeutic options. Until now these different aspects are monitored by artificial patient-centred or physician-centred constructs. Very often, their approach is indirect and is not free from disease-unrelated influences. The Outcome Measures in Rheumatology Soluble Biomarker Working Group has taken several major steps towards the development and implementation of such assessment methods. The major drawback is that these tools do not directly reflect biological and pathological processes. Serological biomarkers objectively measure different aspects of the biological and pathological process and may contribute to a major advance in the assessments of patients. The ultimate goal is the use of biomarkers in a personalised approach for disease management in clinical practice.
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Affiliation(s)
- Kurt de Vlam
- Department of Musculoskeletal sciences, Division of Rheumatology, Katholieke Universiteit Leuven, Belgium.
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Machado P, Castrejon I, Katchamart W, Koevoets R, Kuriya B, Schoels M, Silva-Fernández L, Thevissen K, Vercoutere W, Villeneuve E, Aletaha D, Carmona L, Landewé R, van der Heijde D, Bijlsma JWJ, Bykerk V, Canhão H, Catrina AI, Durez P, Edwards CJ, Mjaavatten MD, Leeb BF, Losada B, Martín-Mola EM, Martinez-Osuna P, Montecucco C, Müller-Ladner U, Østergaard M, Sheane B, Xavier RM, Zochling J, Bombardier C. Multinational evidence-based recommendations on how to investigate and follow-up undifferentiated peripheral inflammatory arthritis: integrating systematic literature research and expert opinion of a broad international panel of rheumatologists in the 3E Initiative. Ann Rheum Dis 2010; 70:15-24. [PMID: 20724311 PMCID: PMC3002765 DOI: 10.1136/ard.2010.130625] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Objective To develop evidence-based recommendations on how to investigate and follow-up undifferentiated peripheral inflammatory arthritis (UPIA). Methods 697 rheumatologists from 17 countries participated in the 3E (Evidence, Expertise, Exchange) Initiative of 2008–9 consisting of three separate rounds of discussions and modified Delphi votes. In the first round 10 clinical questions were selected. A bibliographic team systematically searched Medline, Embase, the Cochrane Library and ACR/EULAR 2007–2008 meeting abstracts. Relevant articles were reviewed for quality assessment, data extraction and synthesis. In the second round each country elaborated a set of national recommendations. Finally, multinational recommendations were formulated and agreement among the participants and the potential impact on their clinical practice was assessed. Results A total of 39 756 references were identified, of which 250 were systematically reviewed. Ten multinational key recommendations about the investigation and follow-up of UPIA were formulated. One recommendation addressed differential diagnosis and investigations prior to establishing the operational diagnosis of UPIA, seven recommendations related to the diagnostic and prognostic value of clinical and laboratory assessments in established UPIA (history and physical examination, acute phase reactants, autoantibodies, radiographs, MRI and ultrasound, genetic markers and synovial biopsy), one recommendation highlighted predictors of persistence (chronicity) and the final recommendation addressed monitoring of clinical disease activity in UPIA. Conclusions Ten recommendations on how to investigate and follow-up UPIA in the clinical setting were developed. They are evidence-based and supported by a large panel of rheumatologists, thus enhancing their validity and practical use.
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Affiliation(s)
- P Machado
- Department of Rheumatology, Coimbra University Hospital, Coimbra, Portugal.
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Vandooren B, Yeremenko N, Noordenbos T, Bras J, Tak PP, Baeten D. Mediators of structural remodeling in peripheral spondylarthritis. ACTA ACUST UNITED AC 2009; 60:3534-45. [DOI: 10.1002/art.27251] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Vordenbäumen S, Joosten LA, Friemann J, Schneider M, Ostendorf B. Utility of synovial biopsy. Arthritis Res Ther 2009; 11:256. [PMID: 19951395 PMCID: PMC3003519 DOI: 10.1186/ar2847] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Synovial biopsies, gained either by blind needle biopsy or minimally invasive arthroscopy, offer additional information in certain clinical situations where routine assessment has not permitted a certain diagnosis. In research settings, synovial histology and modern applications of molecular biology increase our insight into pathogenesis and enable responses to treatment with new therapeutic agents to be assessed directly at the pathophysiological level. This review focuses on the diagnostic usefulness of synovial biopsies in the light of actual developments.
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Affiliation(s)
- Stefan Vordenbäumen
- Department of Endocrinology, Diabetology, and Rheumatology, Heinrich Heine University, 40225 Düsseldorf, Germany.
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Bizzaro N, Tampoia M. Diagnostic accuracy of immunoassays for the detection of antibodies to citrullinated proteins. Clin Rev Allergy Immunol 2009; 34:16-20. [PMID: 18270852 DOI: 10.1007/s12016-007-8027-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anticitrullinated protein/peptide antibodies (ACPA) are highly specific for rheumatoid arthritis (RA). They can be found early in the disease course and are associated with more severe joint destruction and disease activity. In the last 4 years, important progress has been made in the detection and identification of ACPA, improving antigenic composition and epitope recognition. Consequently, many ACPA-ELISA kits have been developed by several manufacturers and are now commercially available. However, albeit their widespread use in clinical laboratories, the use of some kits has not been accompanied by a clinical validation nor by a comparative evaluation of their diagnostic accuracy. In addition, full automation of ACPA assays featuring ease of use, rapid response, and high productivity is just beginning to appear on the market and also deserves clinical and analytical validation. This review will consider the most relevant characteristics of the ACPA-ELISA assays and will describe the results of a comparative study performed with all the currently available second- and third-generation commercial methods.
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Affiliation(s)
- Nicola Bizzaro
- Laboratorio di Patologia Clinica, Ospedale Civile, Via Morgagni, 18, 33028, Tolmezzo, UD, Italy.
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Cantaert T, Brouard S, Thurlings RM, Pallier A, Salinas GF, Braud C, Klarenbeek PL, de Vries N, Zhang Y, Soulillou JP, Tak PP, Baeten D. Alterations of the synovial T cell repertoire in anti-citrullinated protein antibody-positive rheumatoid arthritis. ACTA ACUST UNITED AC 2009; 60:1944-56. [DOI: 10.1002/art.24635] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Vandooren B, Noordenbos T, Ambarus C, Krausz S, Cantaert T, Yeremenko N, Boumans M, Lutter R, Tak PP, Baeten D. Absence of a classically activated macrophage cytokine signature in peripheral spondylarthritis, including psoriatic arthritis. ACTA ACUST UNITED AC 2009; 60:966-75. [PMID: 19333931 DOI: 10.1002/art.24406] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Peripheral spondylarthritis (SpA) is characterized by macrophages that express CD163, a marker of alternative activation (M2). The purpose of this study was to assess whether this differential infiltration with macrophage subsets was associated with a different local inflammatory milieu in SpA as compared with rheumatoid arthritis (RA). METHODS The effect of SpA and RA synovial fluid (SF) on macrophage polarization was tested in vitro on normal peripheral blood monocytes. SF levels of classically activated macrophage (M1)-derived and alternatively activated macrophage (M2)-derived mediators were analyzed by enzyme-linked immunosorbent assay and multiparameter Luminex bead assay in 47 patients with non-psoriatic SpA, 55 with RA, and 15 with psoriatic arthritis (PsA). Paired synovial biopsy samples were analyzed histologically. RESULTS SF from SpA patients promoted preferential expression of the M2 markers CD163 and CD200R in vitro, even if SF levels of the prototypical M2-polarizing factors (interleukin-4 [IL-4], IL-13, and IL-10) were not increased as compared with those in RA SF. Despite a similar degree of overall joint inflammation in SpA and RA, SpA synovitis displayed strongly reduced SF levels of M1-derived, but not M2-derived, mediators, such as tumor necrosis factor alpha (TNFalpha), IL-1beta, IL-12p70, and interferon-gamma-inducible protein 10. SF levels of M1-derived mediators correlated well with peripheral joint inflammation in RA, but neither these mediators nor IL-1alpha and IL-17 did so in SpA. Of interest, the SF cytokine profile in PsA, a more destructive subtype of SpA, was similar to that in non-psoriatic SpA. CONCLUSION The local inflammatory milieu is clearly different in SpA as compared with RA peripheral arthritis. Synovitis in SpA, including that in PsA, is characterized by a selective decrease in M1-derived proinflammatory mediators, such as TNFalpha and IL-1beta.
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Affiliation(s)
- Bernard Vandooren
- Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Cañete JD, Celis R, Noordenbos T, Moll C, Gómez-Puerta JA, Pizcueta P, Palacin A, Tak PP, Sanmartí R, Baeten D. Distinct synovial immunopathology in Behçet disease and psoriatic arthritis. Arthritis Res Ther 2009; 11:R17. [PMID: 19196489 PMCID: PMC2688249 DOI: 10.1186/ar2608] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Revised: 12/29/2008] [Accepted: 02/06/2009] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION The aim of the study was to investigate synovial immunopathology differences between early Behçet disease (BD) and psoriatic arthritis (PsA). METHODS Needle arthroscopy of an inflamed knee joint was performed in patients with early untreated BD (n = 8) and PsA (n = 9). Synovial fluid (SF) was collected for cytokines, perforin, and granzyme analysis. Eight synovial biopsies per patient were obtained for immunohistochemical analysis of the cellular infiltrate (T cells, natural killer cells, macrophages, B cells, plasma cells, mast cells, and neutrophils), blood vessels as well as expression of perforin and granzyme. The stained slides were evaluated by digital image analysis. RESULTS The global degree of synovial inflammation was similar in the two types of arthritis. In the analysis of the innate immune cell infiltration, there was a striking neutrophilic inflammation in BD synovitis whereas PsA displayed significantly higher numbers of cells positive for c-kit, a marker of mast cells. As for lymphocytes, CD3+ T cells, but neither CD20+ B cells nor CD138+ plasma cells, were significantly increased in BD versus PsA. Further analysis of the T-lymphocyte population showed no clear shift in CD4/CD8 ratio or Th1/Th2/Th17 profile. The SF levels of perforin, an effector molecule of cytotoxic cells, displayed a significant four- to fivefold increase in BD. CONCLUSIONS This systematic comparative analysis of early untreated synovitis identifies neutrophils and T lymphocytes as important infiltrating cell populations in BD. Increased levels of perforin in BD suggest the relevance of cytotoxicity in this disease.
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Affiliation(s)
- Juan D Cañete
- Arthritis Unit, Department of Rheumatology, Hospital Clinic de Barcelona and IDIBAPS, Villaroel 170, Barcelona 08036, Spain.
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Vandooren B, Tak PP, Baeten D. Synovial and Mucosal Immunopathology in Spondyloarthritis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2009; 649:71-84. [DOI: 10.1007/978-1-4419-0298-6_5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Cantaert T, Kolln J, Timmer T, van der Pouw Kraan TC, Vandooren B, Thurlings RM, Cañete JD, Catrina AI, Out T, Verweij CL, Zhang Y, Tak PP, Baeten D. B lymphocyte autoimmunity in rheumatoid synovitis is independent of ectopic lymphoid neogenesis. THE JOURNAL OF IMMUNOLOGY 2008; 181:785-94. [PMID: 18566445 DOI: 10.4049/jimmunol.181.1.785] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
B lymphocyte autoimmunity plays a crucial role in the pathogenesis of rheumatoid arthritis. The local production of autoantibodies and the presence of ectopic lymphoid neogenesis in the rheumatoid synovium suggest that these dedicated microenvironments resembling canonical lymphoid follicles may regulate the initiation and maturation of B cell autoimmunity. In this study, we assessed experimentally the relevance of ectopic lymphoid neogenesis for B cell autoimmunity by a detailed structural, molecular, and serological analysis of seropositive and seronegative human synovitis. We demonstrate that synovial lymphoid neogenesis is a reversible process associated with inflammation which is neither restricted to nor preferentially associated with autoantibody positive rheumatic conditions. Despite the abundant expression of key chemokines and cytokines required for full differentiation toward germinal center reactions, synovial lymphoid neogenesis in rheumatoid arthritis only occasionally progresses toward fully differentiated follicles. In agreement with that observation, we could not detect Ag-driven clonal expansion and affinity maturation of B lymphocytes. Furthermore, ectopic lymphoid neogenesis is not directly associated with local production of anti-citrullinated protein Abs and rheumatoid factor in the rheumatoid joint. Therefore, we conclude that synovial lymphoid neogenesis is not a major determinant of these rheumatoid arthritis-specific autoantibody responses.
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Affiliation(s)
- Tineke Cantaert
- Clinical Immunology and Rheumatology, Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, The Netherlands
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Cantaert T, De Rycke L, Mavragani CP, Wijbrandts CA, Niewold TB, Niers T, Vandooren B, Veys EM, Richel D, Tak PP, Crow MK, Baeten D. Exposure to nuclear antigens contributes to the induction of humoral autoimmunity during tumour necrosis factor alpha blockade. Ann Rheum Dis 2008; 68:1022-9. [PMID: 18625621 DOI: 10.1136/ard.2008.093724] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Type I interferons and apoptotic particles contribute to antinuclear autoimmunity in experimental models. This study assessed whether similar mechanisms contribute to break peripheral B-cell tolerance in humans by studying the induction of antinuclear antibodies by tumour necrosis factor blockade in spondyloarthritis. METHODS 40 spondyloarthritis patients treated with infliximab or etanercept and 20 renal cell carcinoma patients treated with sorafenib were studied. Serum antinucleosome IgM and nucleosomes were measured by ELISA. Type I interferon serum activity was measured using a functional reporter cell assay. Synovial apoptosis was assessed by terminal transferase nick end-labelling (TUNEL) assay and anti-active caspase-3 immunostaining. Complement was measured by nephelometry. RESULTS Despite a similar clinical improvement and reduction of synovial inflammation, antinucleosome IgM were induced by infliximab but not etanercept. This induction did not correlate with type I interferon activity, which was transiently downmodulated by infliximab but persistently upregulated by etanercept. In contrast, antinucleosome IgM levels did correlate with serum nucleosome levels, which were significantly upregulated by infliximab but not by etanercept treatment. This increase in serum nucleosome levels was not directly related to massive cell death, but rather to a decrease of complement 3 and 4 serum levels during infliximab treatment. CONCLUSION Infliximab and etanercept have a differential effect on both type I interferon activity and nucleosome levels. Only elevated serum nucleosomes relate to the induction of antinucleosome antibodies after infliximab treatment.
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Affiliation(s)
- T Cantaert
- Academic Medical Center/University of Amsterdam, The Netherlands
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Vandooren B, Cantaert T, Noordenbos T, Tak PP, Baeten D. The abundant synovial expression of the RANK/RANKL/Osteoprotegerin system in peripheral spondylarthritis is partially disconnected from inflammation. ACTA ACUST UNITED AC 2008; 58:718-29. [DOI: 10.1002/art.23290] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Valentino LA, Hakobyan N. Histological changes in murine haemophilic synovitis: a quantitative grading system to assess blood-induced synovitis. Haemophilia 2007; 12:654-62. [PMID: 17083517 DOI: 10.1111/j.1365-2516.2006.01348.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Haemophilia is a congenital disorder that results in frequent bleeding into joints, in which a chronic and debilitating arthritis develops. The presence of blood evokes an inflammatory and proliferative synovial reaction. Although the molecular mechanisms and biochemical pathways which underlie this disorder are not known, significant advances have been made by studying a murine model of human haemophilic synovitis. In order to better understand and correlate the pathological, molecular and biochemical changes, it has become necessary to grade the histological changes observed. Despite a search of the literature and review of relevant publications, none of the currently utilized schemes were appropriate, and therefore a novel grading scheme was developed. After review of over 1000 histological sections, six characteristic changes were identified: (i) synovial hyperplasia; (ii) vascularity; (iii) discolouration by haemosiderin; (iv) the presence of blood (erythrocytes); (v) villus formation; and (vi) cartilage erosion. Synovial hyperplasia and vascularity were present in variable amounts and were quantitatively scored (0-3), while the other changes were qualitatively scored as absent or present (0 or 1). Application of the grading scheme was tested and a high interobserver correlation (greater than 80%) was found. The scheme was easy to learn even by novices, with no prior experience. The availability of the histological grading scheme for murine synovitis will allow for precise evaluation of the pathological changes following joint bleeding, and facilitate correlations with molecular and biochemical changes that lead to these changes.
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Affiliation(s)
- L A Valentino
- The RUSH Hemophilia and Thrombophilia Center, The Department of Pediatrics, Rush Children's Hospital and Rush University Medical Center, Chicago, Illinois 60612-3833, USA.
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Cañete JD, Santiago B, Cantaert T, Sanmartí R, Palacin A, Celis R, Graell E, Gil-Torregrosa B, Baeten D, Pablos JL. Ectopic lymphoid neogenesis in psoriatic arthritis. Ann Rheum Dis 2007; 66:720-6. [PMID: 17223654 PMCID: PMC1954653 DOI: 10.1136/ard.2006.062042] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Ectopic lymphoid neogenesis (LN) occurs in rheumatoid synovium, where it is thought to drive local antigen-dependent B cell development and autoantibody production. This process involves the expression of specific homing chemokines and the development of high endothelial venules (HEV). OBJECTIVE To investigate whether these mechanisms occur in psoriatic arthritis (PsA) synovium, where autoantibodies have not been described and the organisation and function of B cells is not clear, and to analyse their clinical correlates. METHODS Arthroscopic synovial biopsy specimens from patients with PsA before and after tumour necrosis factor alpha blockade were characterised by immunohistochemical analysis for T/B cell segregation, peripheral lymph node addressin (PNAd)-positive HEV, and the expression of CXCL13, CCL21 and CXCL12 chemokines in relation to the size of lymphoid aggregates. RESULTS Lymphoid aggregates of variable sizes were observed in 25 of 27 PsA synovial tissues. T/B cell segregation was often observed, and was correlated with the size of lymphoid aggregates. A close relationship between the presence of large and highly organised aggregates, the development of PNAd+ HEV, and the expression of CXCL13 and CCL21 was found. Large organised aggregates with all LN features were found in 13 of 27 tissues. LN in PsA synovitis was not related to the duration, pattern or severity of the disease. The synovial LN pattern remained stable over time in persistent synovitis, but a complete response to treatment was associated with a regression of the LN features. CONCLUSIONS LN occurs frequently in inflamed PsA synovial tissues. Highly organised follicles display the characteristic features of PNAd+ HEV and CXCL13 and CCL21 expression, demonstrating that the microanatomical bases for germinal centre formation are present in PsA. The regression of LN on effective treatment indicates that the pathogenic and clinical relevance of these structures in PsA merits further investigation.
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Affiliation(s)
- Juan D Cañete
- Servicio de Reumatología, Hospital 12 de Octubre, 28041 Madrid, Spain
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Lories RJU, Derese I, de Bari C, Luyten FP. Evidence for uncoupling of inflammation and joint remodeling in a mouse model of spondylarthritis. ACTA ACUST UNITED AC 2007; 56:489-97. [PMID: 17265484 DOI: 10.1002/art.22372] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To study the relationship between inflammation and remodeling by inhibiting tumor necrosis factor alpha (TNFalpha) in male DBA/1 mice with spontaneous arthritis, a model of spondylarthritis (SpA). METHODS TNFalpha was inhibited using etanercept, a soluble TNF receptor. The efficacy of the dose used (25 micro g/mouse) was confirmed in methylated bovine serum albumin (mBSA)-induced monarthritis, a model of inflammation-driven joint destruction. Male DBA/1 mice with spontaneous arthritis were caged together from the age of 10 weeks onward and were treated twice weekly with etanercept. The incidence and clinical severity of disease were recorded. Mice were killed at age 25 weeks, and histomorphologic analysis was performed. The presence of TNFalpha, NF-kappaB, and Smad signaling was studied using immunohistochemistry. Entheseal endochondral bone formation was modeled using micromass cultures of periosteal cells. RESULTS Etanercept inhibited mouse TNFalpha in vitro and in vivo. Etanercept treatment of mBSA-induced arthritis had a significant effect on the severity of disease. Etanercept did not affect the incidence or severity of spontaneous arthritis. Pathologic analysis revealed no differences between etanercept-treated and phosphate buffered saline-treated mice. TNFalpha-positive cells were observed in the synovium, in vessel-associated cells, in fibrocartilage, and in new cartilage. Activation of Smad signaling was observed in earlier stages of disease than was active NF-kappaB signaling. TNFalpha inhibited chondrogenesis in the micromass model. CONCLUSION Inhibition of TNF did not affect the severity and incidence of joint ankylosis in a mouse model of SpA. Therefore, the process of entheseal ankylosis may be independent of TNF. New tissue formation in SpA could be considered an additional and specific therapeutic target.
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Helliwell PS, Porter G, Taylor WJ. Polyarticular psoriatic arthritis is more like oligoarticular psoriatic arthritis, than rheumatoid arthritis. Ann Rheum Dis 2007; 66:113-7. [PMID: 16840501 PMCID: PMC1798397 DOI: 10.1136/ard.2006.054288] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2006] [Indexed: 01/03/2023]
Abstract
BACKGROUND and objective: Since the original description of psoriatic arthritis (PsA) subgroups by Moll and Wright, there has been some discrepancy in the precise prevalence of the different subgroups and in particular the proportion of patients with polyarthritis. The higher prevalence of the polyarthritis subgroup may be due to the inclusion of patients with seronegative rheumatoid arthritis with coincidental psoriasis. The classification of psoriatic arthritis (CASPAR) study database provided an opportunity to examine this question. METHODS The CASPAR study collected clinical, radiological and laboratory data on 588 patients with physician-diagnosed PsA and 525 controls with other inflammatory arthritis, 70% of whom had rheumatoid arthritis. Patients with PsA were divided into two groups: polyarthritis and non-polyarthritis (which included the Moll and Wright subgroups of spinal disease, distal interphalangeal predominant and arthritis mutilans) and were compared with patients with rheumatoid arthritis. Comparisons were made between all three groups and, if a significant difference occurred, between the two groups with PsA. RESULTS The three groups differed significantly with regard to all clinical and laboratory variables except duration of disease. Significant differences were also found between the two groups of PsA in terms of age, sex, total number of involved joints, disability score and symmetry. However, no differences were found between the groups of patients with PsA in terms of seropositivity for rheumatoid factor and antibodies to cyclic citrullinated peptide, enthesitis, and spinal pain and stiffness. Further, dactylitis was commonly seen in patients with PsA (57% in the polyarticular group and 45% in non-polyarticular group), and uncommonly found in patients with rheumatoid arthritis (5%). With the exception of entheseal changes, syndesmophytes and osteolysis, typical radiological features of PsA could not be used to distinguish between the PsA subgroups. CONCLUSIONS The evidence suggests that the changing prevalence of the polyarticular subgroup of PsA is not because doctors include patients with seronegative rheumatoid arthritis with coincidental psoriasis.
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Affiliation(s)
- P S Helliwell
- Academic Unit of Musculoskeletal and Rehabilitation Medicine, University of Leeds, 36 Clarendon Road, Leeds LS2 9NZ, UK.
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Raine T, Brown D, Bowness P, Hill Gaston JS, Moffett A, Trowsdale J, Allen RL. Consistent patterns of expression of HLA class I free heavy chains in healthy individuals and raised expression in spondyloarthropathy patients point to physiological and pathological roles. Rheumatology (Oxford) 2006; 45:1338-44. [PMID: 16936330 DOI: 10.1093/rheumatology/kel305] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Major histocompatibility complex class I (MHC-I) proteins exist at the cell surface in antigen presenting forms and as beta2m-independent free heavy chains (FHCs). FHCs have been implicated in spondyloarthritis, but little is known about their expression in healthy individuals. We studied FHC expression on various human cell types, comparing spondyloarthropathy patients with healthy and rheumatoid arthritis (RA) patient controls. METHODS MHC-I expression was analysed by flow cytometry. FHC levels were normalized for overall MHC-I to generate a relative expression level. Relative FHC levels were analysed for peripheral blood and trophoblast samples from healthy volunteers, RA and spondyloarthropathy patients. Macrophages and dendritic cells were cultured in vitro to analyse changes following activation. Peripheral blood leucocytes from patients with ankylosing spondylitis (AS) and RA were treated with inflammatory stimuli and subsequent alterations in their relative FHC levels were analysed. RESULTS We found consistent patterns of differential relative FHC expression across lymphocyte subpopulations and particularly high expression on extravillous trophoblast. FHCs were present at higher levels in a reactive arthritis (ReA) population than in healthy controls and RA patients; differences not merely due to the presence of Human Leucocyte Antigen (HLA) B27. Treatment of leucocytes from arthritic patients with bacterial lipopolysaccharide resulted in significant up-regulation of FHC compared with an HLA B27+ control population. CONCLUSIONS Our findings define normal levels and tissue expression of FHCs, and support the hypothesis that disregulation of heavy chain expression may play a pathogenic role in spondyloarthropathy.
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Affiliation(s)
- T Raine
- Department of Pathology, Tennis Court Road, Cambridge, CB2 1QP, UK
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Kruithof E, De Rycke L, Vandooren B, De Keyser F, FitzGerald O, McInnes I, Tak PP, Bresnihan B, Veys EM, Baeten D. Identification of synovial biomarkers of response to experimental treatment in early-phase clinical trials in spondylarthritis. ACTA ACUST UNITED AC 2006; 54:1795-804. [PMID: 16729282 DOI: 10.1002/art.21914] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To identify biomarkers for effective treatment in early-phase clinical trials of spondylarthritis (SpA), by analyzing which synovial features can be reliably identified in patients with SpA. METHODS Synovial biopsies were performed at weeks 0 and 12 in 20 SpA patients treated with infliximab, 20 treated with etanercept, and 12 who were not treated. Primary clinical outcome measures were patient and physician global assessment of disease activity. Extensive histologic evaluation included assessment of lining layer hyperplasia, vascularity, markers of cellular infiltration, and metalloproteinases (MMPs) in the lining and sublining layers. RESULTS Changes in levels of CD163 (resident tissue macrophages) in the lining, and CD163, MMP-3, and myeloid-related protein 14 (MRP-14; infiltrating myeloid cells) in the sublining correlated significantly with changes in the primary clinical outcomes. Comparison between responders (n = 35) and nonresponders (n = 17) showed differences in the degree of change in the levels of CD163 in the lining and CD163, MMP-3, and CD3 in the sublining, whereas trends in change in the levels of MRP-8 and MRP-14 in the lining and sublining were similar in the 2 groups. Accordingly, the highest differences in standardized response means (SRMs) between the 2 groups were found for CD163 in the lining, MMP-3, CD163, CD3, and MRP-8 in the sublining, and the level of polymorphonuclear cells (PMNs). When comparing treated and untreated patients, high differences in SRMs were again found for CD163 in the lining, MMP-3, CD163, and MRP-8 in the sublining, and PMNs. These parameters performed prognostically as well as the erythrocyte sedimentation rate and better than the C-reactive protein level. Class prediction analysis yielded a 90% correct prediction using 8 synovial parameters, as follows: lining and sublining CD163, MRP-8, and MRP-14, sublining MMP-3, and PMNs. In validation analyses with independent samples, effective treatment was correctly predicted in 24 of 30 SpA patients and in 2 of 2 placebo-treated patients. CONCLUSION Changes in synovial macrophage subsets, PMN levels, and MMP-3 expression reflect response to treatment in SpA. The ability of these parameters to correctly identify effective therapy makes them interesting biomarkers for use in early-phase clinical trials in SpA.
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De Rycke L, Kruithof E, Vandooren B, Tak PP, Baeten D. Pathogenesis of spondyloarthritis: Insights from synovial membrane studies. Curr Rheumatol Rep 2006; 8:275-82. [PMID: 16839506 DOI: 10.1007/s11926-006-0008-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Here, we review histopathologic studies of the cellular and molecular pathways of spondyloarthritis (SpA) synovial inflammation. In contrast with lymphocytes, specific macrophage subsets and polymorphonuclear cells selectively increase in SpA synovitis, correlate with global disease activity, decrease rapidly upon effective treatment with tumor necrosis factor (TNF)-alpha blockers, and serve as valuable biomarkers for treatment response in SpA. Functionally, increased Toll-like receptor triggering may be responsible for the proinflammatory response of these cells. Therefore, we propose that an exaggerated response of the innate immune system in genetically susceptible patients rather than a classic, lymphocyte-mediated autoimmune process is involved in the pathogenesis of SpA.
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Affiliation(s)
- Leen De Rycke
- Division of Clinical Immunology and Rheumatology, F4-148, Academic Medical Center/University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
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Baeten D, Houbiers J, Kruithof E, Vandooren B, Van den Bosch F, Boots AM, Veys EM, Miltenburg AMM, De Keyser F. Synovial inflammation does not change in the absence of effective treatment: implications for the use of synovial histopathology as biomarker in early phase clinical trials in rheumatoid arthritis. Ann Rheum Dis 2006; 65:990-7. [PMID: 16414969 PMCID: PMC1798244 DOI: 10.1136/ard.2005.047852] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To determine the impact on synovial histopathology of changes in clinical disease activity in the absence of effective treatment. METHODS Twelve patients with active RA not receiving effective treatment were studied over a 14 week period. Synovial biopsy specimens obtained at baseline and week 14 were analysed by histology and immunohistochemistry. RESULTS Over the course of 14 weeks, there was a trend towards a decrease of the DAS28, with 7/12 patients being good or moderate DAS28 responders despite the absence of effective treatment. Patients' assessment of global disease activity and swollen joint count both decreased significantly. Histologically, there was a decrease of lining layer hyperplasia and lymphoid aggregates, a similar trend for vascularity, but there was no effect on global synovial infiltration. Accordingly, there was no decrease of the cellular infiltration with T lymphocytes (CD3, CD4, CD8), B lymphocytes (CD20), plasma cells (CD38), dendritic cells (CD1a, CD83), and even an increase of CD163+ sublining macrophages, with a similar trend for CD68+ sublining macrophages. The changes in DAS28 scores in these patients did not correlate with changes in histological variables, with the exception of an inverse correlation with plasma cells. Remarkably, even in the DAS28 responders, no significant changes in synovial inflammatory infiltration were noted. CONCLUSIONS Despite variations in global disease activity, synovial inflammatory infiltration did not change significantly in the absence of effective treatment. The lack of a placebo effect on synovial markers of treatment response such as sublining macrophages can facilitate conclusive early phase trials with small numbers of patients with RA.
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Affiliation(s)
- D Baeten
- Clinical Immunology and Rheumatology, Academic Medical Centre University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
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Kruithof E, De Rycke L, Roth J, Mielants H, Van den Bosch F, De Keyser F, Veys EM, Baeten D. Immunomodulatory effects of etanercept on peripheral joint synovitis in the spondylarthropathies. ACTA ACUST UNITED AC 2006; 52:3898-909. [PMID: 16329106 DOI: 10.1002/art.21426] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVE Because different tumor necrosis factor alpha (TNFalpha) blockers may have distinct immunomodulatory effects on specific disease manifestations, the present study was carried out to investigate the immunomodulating effects of etanercept on peripheral synovitis in the spondylarthropathies (SpA). METHODS Peripheral joint disease was assessed clinically, histologically, and radiologically in a prospective 2-year study of 20 patients with SpA treated with etanercept. Synovial tissue biopsy samples obtained at weeks 0, 12, and 52 were analyzed by histology and immunohistochemistry for the extent of inflammation, changes to tissue architecture, and matrix degradation. Serum levels of myeloid-related protein 8 (MRP-8)/MRP-14, matrix metalloproteinase 3 (MMP-3), and cartilage oligomeric matrix protein (COMP) were determined by enzyme-linked immunosorbent assay. RESULTS Etanercept induced a rapid and sustained clinical improvement of peripheral joint disease. Histologic synovitis was down-regulated, with a profound reduction in global cellular infiltration and T lymphocytes, but not B lymphocytes. The most prominent change in markers of inflammation was a reduction in the different macrophage subsets (CD68, CD163, MRP-8, and MRP-14), but this was not paralleled by a decrease in serum MRP-8/MRP-14. Structural changes included normalization of lining layer hyperplasia and a moderate reduction in vascularity. However, no effect on the microarchitecture of lymphoid aggregates was observed. In terms of an effect on matrix degradation, the synovial expression of MMP-3 and MMP-9 was down-modulated in correlation with a rapid and profound decrease in serum MMP-3. At week 52, serum COMP levels were also reduced. No significant radiologic disease progression was observed in these patients over a 2-year period. CONCLUSION Use of etanercept effectively down-modulated the immunopathologic processes of SpA synovitis, both in the short term and in the long term.
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