scholarly journals Effect of Human Herpesviruses 6 and 7 Infection on the Clinical Course of Rheumatoid Arthritis / Cilvēka Herpesvīrusa 6 Un 7 Infekcijas Ietekme Uz Reimatoīdā Artrīta Klīnisko Gaitu

2016 ◽  
Vol 70 (4) ◽  
pp. 165-174 ◽  
Author(s):  
Anda Kadiša ◽  
Zaiga Nora-Krūkle ◽  
Svetlana Kozireva ◽  
Simons Svirskis ◽  
Pēteris Studers ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Viral Infections ◽  
Clinical Course ◽  
Immunosuppressive Treatment ◽  
Virus Reactivation ◽  
Autoimmune Inflammatory Disease ◽  
High Prevalence ◽  
Synovial Tissues ◽  
Infection Markers

Abstract Rheumatoid arthritis (RA) is a chronic systemic autoimmune inflammatory disease affecting joints and causing symmetrical chronic progressive aseptic synovitis and erosive-destructive changes. Viruses and viral infections are considered to be the main risk factors for autoimmune disease development (especially for individuals with genetic predisposition). The goal of this study was to evaluate the frequency of HHV-6 and HHV-7 persistent infection and its activity phase in RA and osteoarthritis (OA) patients, and healthy persons. We examined also the influence of HHV-6 and -7 infections on RA activity, aggressiveness, radiographical stage, and frequency of complications as well as the presence of HHV-6 infection markers in synovial fluid and synovial tissues of RA joints of affected patients. Despite the lack of significant correlation between frequency of persistent single HHV-6, single HHV-7, and concurrent HHV-6 and HHV-7 infection and RA clinical course, we found that both active and latent HHV-6 and/or HHV-7 infection increased RA activity and progression in several clinical and laboratory parameters. Regarding the severity of the course of RA, we observed also a high prevalence of RA complications in the patient group with active single HHV-6 infection and also a more severe radiographical stage in RA patients with active concurrent HHV-6 and HHV-7 infection. Moreover, viral infection markers were found in synovial fluid and synovial tissues of affected joints of RA patients. This suggests that HHV-6 and/or HHV-7 infection has effect on the disease clinical course, but virus reactivation may be a consequence of immunosuppressive treatment.

Endothelin-1 Production by Human Synoviocytes

1998 ◽  
Vol 35 (2) ◽  
pp. 290-294 ◽  
Author(s):  
Hiroshi Yoshida ◽  
Yuji Imafuku ◽  
Morihiro Ohhara ◽  
Masayuki Miyata ◽  
Reji Kasukawa ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Inflammatory Arthritis ◽  
Synovial Cells ◽  
Type B ◽  
Serum Samples ◽  
Synovial Macrophage ◽  
Significant Difference ◽  
Synovial Fluids ◽  
Synovial Tissues

Immunoreactive (ir)-endothelin (ET)-l concentrations in serum samples and synovial fluids from patients with rheumatoid arthritis were higher than concentrations in sera obtained from healthy volunteers. No significant difference in ir-ET-1 concentrations in synovial fluid was observed between rheumatoid arthritis patients and osteoarthritis patients. Cultured fluids of synovial cells collected from synovial tissues and leucocytes from synovial fluids of rheumatoid arthritis patients were studied to determine the origin of ir-ET-1 in synovial fluids. Ir-ET-1 was detected in the cultured fluids of synovial macrophage-like type A cells, but not in those of fibroblast-like type B cells from the synovial tissues or leucocytes from the synovial fluids. Longitudinal studies showed that the ir-ET-1 concentration in the cultured fluid reached a peak around 24 h after starting the culture. ET-1 secreted from macrophage-like synoviocytes may be involved in the pathogenesis of inflammatory arthritis.

Urocortin in the synovial tissue of patients with rheumatoid arthritis

2001 ◽  
Vol 100 (6) ◽  
pp. 577-589 ◽  
Author(s):  
Miwa UZUKI ◽  
Hironobu SASANO ◽  
Yasunari MURAMATSU ◽  
Kazuhito TOTSUNE ◽  
Kazuhiro TAKAHASHI ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Synovial Tissue ◽  
High Power ◽  
Rt Pcr ◽  
Active Stage ◽  
High Power Field ◽  
Mrna In Situ Hybridization ◽  
Synovial Tissues

Urocortin is a newly identified member of the corticotropin-releasing factor (CRF) neuropeptide family, and is known to be involved in the modulation of the inflammatory process. We examined the expression of urocortin, CRF and their receptors (CRF receptor; CRF-R) in the synovial tissue of patients with rheumatoid arthritis (RA) in order to study the possible biological roles of urocortin. Synovial tissues/fluids were obtained from 38 patients with RA, nine patients with osteoarthritis and four with trauma. We studied the concentration of urocortin in the synovial fluid using RIA, and the expression of urocortin in synovial tissue using immunohistochemistry, mRNA in situ hybridization and reverse transcriptase–PCR (RT-PCR). In addition, we examined the immunolocalization of CRF and the expression of CRF-R1, -R2-α and -R2-β mRNAs utilizing RT-PCR in these synovial tissues. Urocortin concentrations in synovial fluid were higher in RA patients (79.8±154 pg/ml) than in control patients (12.3±4.8 pg/ml; P ≤ 0.05). Urocortin immunoreactivity and mRNA signals were both detected in synovial cells, lymphocytes, fibroblasts and macrophages. The number of urocortin-positive cells in the synovium was significantly higher in RA (73.1±32.1 cells per high-power field) than in control (18.4±10.4 cells per high-power field) patients. In addition, both urocortin immunoreactivity and mRNA signals in the synovium reached maximum levels in the active stage of RA inflammation. Moreover, the number of immunoreactive urocortin-positive cells was significantly correlated with the urocortin concentration in synovial fluid (r = 0.705; P < 0.001) and with histologically defined local inflammatory activity (r = 0.641; P < 0.001). The distribution and number of immunoreactive CRF-positive cells in synovial tissue were similar to those of urocortin-positive cells (r = 0.701; P < 0.001). Urocortin, CRF-R1 and CRF-R2-α mRNAs detected by RT-PCR were expressed in in the synovium of 10/10, 10/10 and 2/10 RA patients respectively, but CRF-R2-β was not expressed. Urocortin was actively synthesized in the synovium of RA patients. The present study suggests that urocortin may play an important role as an autocrine and/or paracrine regulator of synovial inflammation in RA.

scholarly journals Relative Expression of Soluble tnf Versus Transmembrane tnf in Spondyloarthritis

2017 ◽  
Vol 4 (1) ◽  
pp. 56
Author(s):  
Huriatul Masdar
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Synovial Tissue ◽  
Differential Regulation ◽  
Mrna Levels ◽  
Tnf Receptors ◽  
Relative Expression ◽  
Synovial Tissues

TNF is important in rheumatoid arthritis (RA) and spondyloarthritis (SpA) pathogenesis. Recently reports showedsTNF levels were significantly lower in SpA than RA synovial fluid (SF). Therefore, the differential regulation of TNFin both diseases were investigated focusing on the balance of sTNF-tmTNF and both TNF receptors expression. Synovialfluid from 22 RA and 25 SpA were analyzed by ELISA. sTNF was confirmed significantly higher in RA than SpA.Total TNF of synovial tissues assessed by qPCR showed similar levels, suggesting a higher tmTNF/sTNF ratio in SpA.The levels of sTNF-R1 and sTNF-R2 were significantly lower in SpA than RA SF. Interestingly, sTNF-R2/sTNF-R1increased in SpA. qPCR on synovial tissue showed similar mRNA levels for TNF-R2 but decrease of TNF-R1 in SpA.IL-6R levels did not showed differences and TIMP-3 tended to be higher in RA than in SpA SF. In conclusion, weobserved a shift from sTNF/TNF-R1 in RA to tmTNF/TNF-R2 in SpA.

scholarly journals Uridine Diphosphate (UDP) Promotes Rheumatoid Arthritis Through P2Y6 Activation

2020 ◽  
Author(s):  
Hongxing Wang ◽  
Hui Wu ◽  
Kehua Fang ◽  
Xiaotian Chang
Keyword(s):  
Rheumatoid Arthritis ◽  
Cell Proliferation ◽  
Synovial Fluid ◽  
Real Time ◽  
Uridine Diphosphate ◽  
Collagen Induced Arthritis ◽  
Synovial Tissues ◽  
And Migration ◽  
G Protein Coupled ◽  
Fibroblast Like Synoviocytes

Abstract Background: Uridine diphosphate (UDP) is an extracellular nucleotide signaling molecule implicated in diverse biological processes via specific activation of the metabotropic pyrimidine and purine nucleotide receptor pyrimidinergic receptor P2Y, G Protein-Coupled, 6 (P2Y6).Methods: This study used a quasi-targeted liquid chromatography-mass spectrometry (LC-MS) approach to investigate the unique expression of metabolites in rheumatoid arthritis (RA) synovial fluid (SF) (n=10) with samples from osteoarthritis (OA) as controls (n=10). RA fibroblast-like synoviocytes (FLSs) were collected from synovial tissues and cultured with UDP or MRS2578, P2Y6 antagonist, and FLSs from OA was used as controls. Rats with collagen-induced arthritis (CIA) were established and injected with UDP or MRS2578 or both. P2Y6 expression was examined using real-time PCR, Western blotting and Immunohistochemistry. Cell proliferation, apoptosis and migration of FLSs were measured using CCK-8 assay, real-time cell analysis, flow cytometry, the wound healing assay and transwell assay. The concentration of UDP in culture medium, synovial fluid and peripheral blood RA and CIA rats was measured using a Transcreener UDP Assay, IL-6 was measured using ELISA and flow assay, and other pro-inflammatory cytokines was measured using Th1/Th2 Subgroup Detection Kit. Results: LC-MS analysis showed that the UDP level is not only higher in RA SF than in OA SF but also positively correlated with anticyclic citrullinated peptide (anti-CCP) and rheumatoid factor (RF) levels in RA. The increased UDP concentration was verified in the plasma and SF samples of RA patients (n=36) and healthy volunteers (n=36), and the levels were significantly correlated with RF and anti-CCP level in the samples. The study also found that UDP stimulated the cell proliferation, migration and interleukin-6 (IL-6) secretion of RA FLSs and inhibited their apoptosis in the culture. The P2Y6 antagonist MRS2578 inhibited this effect of UDP in the culture. UDP injection accelerated the development of collagen-induced arthritis (CIA) in a rat model and stimulated IL-6 production, but simultaneous injection of MRS2578 suppressed these effects and alleviated CIA. P2Y6 expression was increased in RA and CIA synovial tissues and was unaltered by UDP treatment. UDP treatment and P2Y6 activity didn’t change levels of other proinflammatory cytokines in cultured FLSs and CIA rats.Conclusion: These results suggest that UDP is highly expressed in RA and stimulates RA pathogenesis by promoting P2Y6 activities to increase IL-6 production.

scholarly journals Differential inflammation-mediated function of prokineticin 2 in the synovial fibroblasts of patients with rheumatoid arthritis compared to osteoarthritis

2021 ◽  
Author(s):  
Kentaro Noda ◽  
Bianca Dufner ◽  
Haruyasu Ito ◽  
Ken Yoshida ◽  
Gianfranco Balboni ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Synovial Tissue ◽  
Synovial Fibroblasts ◽  
Prokineticin 2 ◽  
Physiological Processes ◽  
Sickness Behaviors ◽  
Synovial Tissues ◽  
Fibroblast Like Synoviocytes

Abstract Prokineticin 2 (PK2) is a secreted protein involved in several pathological and physiological processes, including the regulation of inflammation, sickness behaviors, and the circadian rhythm. Recently, it was reported that PK2 is associated with the pathogenesis of collagen-induced arthritis in mice. However, whether PK2 influences the pathogenesis of rheumatoid arthritis (RA) or osteoarthritis (OA) remains unknown. In this study, we collected synovial tissue, plasma, synovial fluid, and fibroblast-like synoviocytes (FLS) from RA and OA patients to analyze the role of PK2 using immunohistochemistry, ELISAs, and tissue superfusion studies. PK2 and its receptors prokineticin receptor (PKR) 1 and 2 were expressed in RA and OA synovial tissues. PKR1 expression in RA synovial tissue was downregulated compared with OA synovial tissue. The PK2 concentration was higher in RA synovial fluid than in OA synovial fluid but similar between RA and OA plasma. PK2 suppressed the production of IL-6 from TNFα-prestimulated OA-FLS, and this effect was attenuated in TNFα-prestimulated RA-FLS. This phenomenon was accompanied by the upregulation of PKR1 in OA-FLS and the downregulation of PK2 and PKR1 in RA-FLS. This study provides a new model to explain some aspects underlying the chronicity of inflammation in RA.

scholarly journals Additive Effects of VDBP and 1,25(OH)2D3 on the Viability and Apoptosis of Rheumatoid Arthritis Synovial Fibroblasts

2021 ◽  
Vol 11 ◽  
Author(s):  
Yeyong Zhang ◽  
Shufeng Li ◽  
Feng Zhuo ◽  
Hongxing Wang ◽  
Xiubin Geng ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Cell Cycle ◽  
Flow Cytometry ◽  
Synovial Fluid ◽  
Synovial Fibroblasts ◽  
Synovial Cells ◽  
Additive Effects ◽  
Vitamin D Binding Protein ◽  
Synovial Tissues ◽  
Lower Expression

AimThis study is to investigate the additive effect of Vitamin D-binding protein (VDBP) and 1,25(OH)2D3 on the viability and apoptosis of synovial cells from patients with rheumatoid arthritis (RA).MethodsSynovial tissues and synovial fluid of patients with RA and osteoarthritis (OA) were collected. The expression of VDBP was analyzed with immunohistochemistry and ELISA. CCK-8 assay was applied to detect cell viability. Flow cytometry was used to analyze cell cycle and apoptosis.ResultsImmunohistochemical results showed that the expression of VDBP in the synovium of RA patients was significantly lower than that of OA (P&lt;0.05). Similarly, ELISA results presented a lower expression of VDBP in the synovial fluid of RA patients. The results of CCK-8 assay showed that both 1,25(OH)2D3 and VDBP significantly inhibited the viability of rheumatoid arthritis synovial fibroblasts (RASF) (P&lt;0.05). The treatment with 1,25(OH)2D3+VDBP led to more significantly inhibited viability of RASF, compared with 1,25(OH)2D3 alone (P&lt;0.05). The results of flow cytometry showed that 1,25(OH)2D3 and VDBP both promoted the apoptosis of RASF (P&lt;0.05) and 1,25(OH)2D3+VDBP led to a higher proportion of RASF apoptosis, compared with 1,25(OH)2D3 alone (P&lt;0.05). However, 1,25(OH)2D3 and VDBP had no significant effect on the cell cycle of RASF. Additionally, 1,25(OH)2D3 promoted the expression of VDBP in RASF, but not concentration-dependently.ConclusionVDBP is reduced in the synovial tissue and synovial fluid of RA patients and can inhibit viability of RASF and promote the apoptosis of RASF. The 1,25(OH)2D3 can upregulate the expression of VDBP in RASF. Additionally, VDBP can enhance the effects of 1,25(OH)2D3 on viability and apoptosis of RASF.

scholarly journals Differential inflammation-mediated function of prokineticin 2 in the synovial fibroblasts of patients with rheumatoid arthritis compared with osteoarthritis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kentaro Noda ◽  
Bianca Dufner ◽  
Haruyasu Ito ◽  
Ken Yoshida ◽  
Gianfranco Balboni ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Synovial Tissue ◽  
Synovial Fibroblasts ◽  
Collagen Induced Arthritis ◽  
Prokineticin 2 ◽  
Physiological Processes ◽  
Sickness Behaviors ◽  
Synovial Tissues

AbstractProkineticin 2 (PK2) is a secreted protein involved in several pathological and physiological processes, including the regulation of inflammation, sickness behaviors, and circadian rhythms. Recently, it was reported that PK2 is associated with the pathogenesis of collagen-induced arthritis in mice. However, the role of PK2 in the pathogenesis of rheumatoid arthritis (RA) or osteoarthritis (OA) remains unknown. In this study, we collected synovial tissue, plasma, synovial fluid, and synovial fibroblasts (SF) from RA and OA patients to analyze the function of PK2 using immunohistochemistry, enzyme-linked immunosorbent assays, and tissue superfusion studies. PK2 and its receptors prokineticin receptor (PKR) 1 and 2 were expressed in RA and OA synovial tissues. PKR1 expression was downregulated in RA synovial tissue compared with OA synovial tissue. The PK2 concentration was higher in RA synovial fluid than in OA synovial fluid but similar between RA and OA plasma. PK2 suppressed the production of IL-6 from TNFα-prestimulated OA-SF, and this effect was attenuated in TNFα-prestimulated RA-SF. This phenomenon was accompanied by the upregulation of PKR1 in OA-SF. This study provides a new model to explain some aspects underlying the chronicity of inflammation in RA.

scholarly journals Progranulin Is Associated with Disease Activity in Patients with Rheumatoid Arthritis

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Lucie Andrés Cerezo ◽  
Markéta Kuklová ◽  
Hana Hulejová ◽  
Zdeňka Vernerová ◽  
Nikola Kaspříková ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Disease Activity ◽  
Health Assessment ◽  
Immunohistochemical Analysis ◽  
Healthy Controls ◽  
Reactive Protein ◽  
Synovial Tissues ◽  
Inflammatory Infiltrates ◽  
Fluid Levels

Objective. Progranulin (PGRN) is implicated in the pathogenesis of rheumatoid arthritis (RA). The aim of this study was to assess the relationship between PGRN and disease activity in RA.Methods.PGRN levels were evaluated in patients with RA (n=47) and OA (n=42) and healthy controls (n=41). Immunohistochemical analysis of PGRN in synovial tissues was performed. The association between PGRN and C-reactive protein (CRP), disease activity score (DAS28-CRP), and health assessment questionnaire (HAQ) was studied.Results. Circulating PGRN was elevated in patients with RA and OA compared to healthy controls (227.1±100.2and221.5±102.5versus128.1±34.7 ng/mL;P<0.001). Synovial fluid levels of PGRN were higher in patients with RA compared to OA (384.5±275.3versus241.4±165.2 ng/mL;P=0.002). PGRN expression was significantly upregulated in the synovial tissue of RA patients particularly in the inflammatory infiltrates. Serum PGRN levels correlated with DAS28 (r=0.327,P=0.049) and HAQ score (r=0.323,P=0.032), while synovial fluid PGRN correlated only with HAQ (r=0.310,P=0.043) in patients with RA. PGRN levels were not associated with CRP or autoantibodies.Conclusions. This study demonstrates increased PGRN expression at local sites of inflammation and association between PGRN levels, disease activity, and functional impairment in patients with RA.

scholarly journals Epstein-Barr Virus Reactivation after Infliximab in Rheumatoid Arthritis: A Case Report

2011 ◽  
Vol 2011 ◽  
pp. 1-3 ◽  
Author(s):  
Michele Colaci ◽  
Marco Sebastiani ◽  
Gilda Sandri ◽  
Marisa Meacci ◽  
Clodoveo Ferri
Keyword(s):  
Rheumatoid Arthritis ◽  
Epstein Barr Virus ◽  
Viral Infections ◽  
Therapeutic Strategies ◽  
Tnf Alpha ◽  
Virus Reactivation ◽  
Alpha Blockers ◽  
Barr Virus ◽  
Epstein Barr ◽  
Epstein Barr Virus Reactivation

TNF-alpha blockers represent one of the most important therapeutic strategies for rheumatoid arthritis, but their use has raised the question about their safety profile, particularly in respect to viral infections/reactivations. We describe the case of a patient who developed a symptomatic EBV reactivation 11 days after the first infusion of infliximab.

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