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Rheumatoid arthritis;synovial

Su Ni, Chenkai Li, Nanwei Xu, Xi Liu, Wei Wang, Wenyang Chen, Yuji Wang, Andre J van Wijnen
Elevated levels of follistatin-like protein 1 (FSTL1) have been found both in mouse models for human rheumatoid arthritis (RA) and collagen-induced arthritis (CIA). In this study, we elucidated the potential mechanisms by which FSTL1 contributes to the pathogenesis of RA. Fibroblast-like synoviocytes (FLSs) were established from synovial tissues of RA patients and stimulated with human recombinant FSTL1. Protein and mRNA expression levels of select matrix metalloproteinases (i.e., MMP1, MMP3, MMP13) in FLS were measured by, respectively, real-time RT-qPCR and ELISA...
June 22, 2018: Journal of Cellular Physiology
Binit Vaidya, Manisha Bhochhibhoya, Shweta Nakarmi
Examination of urate crystal in synovial fluid (SF) remains the gold standard for diagnosis of gout, but is not universally available. SF uric acid (UA) level may be measured by the uricase method with an automated analyzer. The present study aimed to evaluate the utility of SF to serum UA ratio (SSR) for diagnosis of gout. A cross-sectional study was conducted at the National Center for Rheumatic Diseases, Nepal. Patients presenting with acute (<1 day) joint pain and/or swelling were included. Aspiration was performed in all patients and fluid was subjected to testing for urate level, pH and cell counts and microscopy...
July 2018: Biomedical Reports
Venugopal Panga, Srivatsan Raghunathan
Rheumatoid arthritis (RA) is a chronic inflammatory disease of the synovial joints. Though the current RA therapeutics such as disease-modifying antirheumatic drugs (DMARDs), nonsteroidal anti-inflammatory drugs (NSAIDs) and biologics can halt the progression of the disease, none of these would either dramatically reduce or cure RA. So, the identification of potential therapeutic targets and new therapies for RA are active areas of research. Several studies have discovered the involvement of cytokines in the pathogenesis of this disease...
2018: PloS One
Beate M Rüger, Tanja Buchacher, Alexander Giurea, Bernd Kubista, Michael B Fischer, Johannes M Breuss
Introduction: New vessel formation requires a continuous and tightly regulated interplay between endothelial cells with cells of the perivascular microenvironment supported by mechanic-physical and chemical cues from the extracellular matrix. Aim: Here we investigated the potential of small fragments of synovial tissue to form de novo vascular structures in the context of inflammation within three dimensional (3D) fibrin-based matrices in vitro , and assessed the contribution of mesenchymal stromal cell (MSC)-immune cell cross-talk to neovascularization considering paracrine signals in a fibrin-based co-culture model...
2018: Frontiers in Physiology
Y H Wang, Z Q Yang, S F Zhu, Y Gao
In this study, a collagen-induced arthritis (CIA) model was established to simulate rheumatoid arthritis (RA) using two intradermal injections of bovine type II collagen and Freund’s complete adjuvant mixture given at two-week intervals. Subsequently, the transplantation of human umbilical cord mesenchymal stem cells (hUC-MSCs) was used to treat RA and the treatment efficacy, as well as the possible regulatory mechanism underlying hUC-MSC transplantation, was observed. During the study, forty rats were randomly divided into four groups and their blood samples were collected at different time points to measure levels of serum cartilage oligomeric matrix protein (COMP)...
May 2018: Journal of Biological Regulators and Homeostatic Agents
Yu-Lan Chen, Jun Jing, Ying-Qian Mo, Jian-Da Ma, Li-Juan Yang, Le-Feng Chen, Xiang Zhang, Tao Yan, Dong-Hui Zheng, Frank Pessler, Lie Dai
BACKGROUND: Previous studies have revealed that hepatitis B virus (HBV) infection may be related to rheumatoid arthritis (RA), but there are no studies on the presence of HBV antigens or nucleic acid in synovium from patients with RA with HBV infection. In the present study, we investigated the presence of HBV in the synovium and its clinical significance in RA. METHODS: Fifty-seven consecutive patients with active RA (Disease Activity Score 28-joint assessment based on C-reactive protein ≥ 2...
June 19, 2018: Arthritis Research & Therapy
Lara Valor, Jesús Garrido, Lina Martínez-Estupiñán, Diana Hernández-Flórez, Iustina Janta, Francisco Javier López-Longo, Indalecio Monteagudo, Carlos M González, Esperanza Naredo
To identify features associated with long-term persistent remission in rheumatoid arthritis (RA) patients on tapered biological disease-modifying antirheumatic drugs (bDMARD) (tap-bDMARD) therapy. We carried out a 40-month (m) extension follow-up study of 77 RA patients from a previous 12 m tap-bDMARD study. Disease activity was assessed at baseline and every 3 months. Doppler US investigation of 42 joints for the presence and grade (0-3) of B-mode synovial hypertrophy (SH) and synovial power Doppler signal (i...
June 18, 2018: Rheumatology International
Cintia Scucuglia Heluany, Leonard de Vinci Kanda Kupa, Mariana Nascimento Viana, Cristina Maria Fernandes, Sandra Helena Poliselli Farsky
The genesis of rheumatoid arthritis (RA) is complex and dependent on genetic background and exposure to environmental xenobiotic. Indeed, smoking is associated to developing and worsening pre-existing RA. Nevertheless, the mechanisms and cigarette compounds involved in the harmful processes have not been elucidated. Here, we investigated if the exposure to hydroquinone (HQ), an abundant pro-oxidative compound of cigarette and benzene metabolite, could worsen the ongoing RA. Hence, collagen-induced arthritis (CIA) was induced in male Wistar rats by s...
June 14, 2018: Chemico-biological Interactions
Yun-Yun Guan, Yeqing Zhang, Li-Xin Liu, Hai-Dong Li, Dan Xue, Wei-Lian Bao, Guan Ye, Xiaoyan Shen
Rheumatoid arthritis (RA) severely affects the quality life of patients due to its high association with disability. Traditional Chinese medicines have been reported to exert notable therapeutic effects on RA. The Chinese medicinal prescription Wang‑Bi Tablet (WB) has been successfully used to clinically treat RA for many years; however, its pharmacological mechanism of action is largely unclear. In the present study, adjuvant‑induced arthritis (AIA) rats were used to evaluate the anti‑inflammatory effects of WB and western blotting was used to explore the molecular mechanisms...
June 8, 2018: International Journal of Molecular Medicine
Takeshi Suzuki, Yuka Hidaka, Yu Seri
The consecutive reports and stored images of ultrasound examinations for 100 symptomatic ankles of 74 patients with rheumatoid arthritis (RA) were reviewed for the presence or absence of retrocalcaneal bursitis (RCB) and Achilles tendon enthesitis (ATE). The ankles were classified into 4 categories based on the presence or absence of RCB or ATE. The number of RCB(-)/ATE(-), RCB(+)/ATE(-), RCB(+)/ATE(+), and RCB(-)/ATE(+) ankles was 62, 16, 12, and 10, respectively. When classifying patients into early RA and established RA, the percentage of RCB(-)/ATE(+) ankles with early RA was significantly lower than that with established RA ( P  = ...
2018: Clinical Medicine Insights. Arthritis and Musculoskeletal Disorders
Jie Qian, Lingxiao Xu, Xiaoxuan Sun, Yani Wang, Wenhua Xuan, Qian Zhang, Pengfei Zhao, Qin Wu, Rui Liu, Nan Che, Fang Wang, Wenfeng Tan, Miaojia Zhang
Unfortunately, after publication of this article [1], it was noticed that the panel for Fig. 4b was inadvertently obscured during the production process. The full, correct Fig. 4 can be seen below and the original article has been corrected to reflect this.
June 13, 2018: Arthritis Research & Therapy
Azita Sohrabian, Linda Mathsson-Alm, Monika Hansson, Ann Knight, Jörgen Lysholm, Martin Cornillet, Karl Skriner, Guy Serre, Anders Larsson, Tomas Weitoft, Johan Rönnelid
INTRODUCTION: Individual patients with rheumatoid arthritis (RA) show divergent specific anti-citrullinated protein/peptide antibodies (ACPA) patterns, but hitherto no individual ACPA specificity has consistently been linked to RA pathogenesis. ACPA are also implicated in immune complexes (IC)-associated joint pathology, but until now, there has been no method to investigate the role of individual ACPA in RA IC formation and IC-associated pathogenesis. METHODS: We have developed a new technique based on IC binding to C1q-coated magnetic beads to purify and solubilise circulating IC in sera and synovial fluids (SF) from 77 patients with RA...
June 12, 2018: Annals of the Rheumatic Diseases
Anne Musters, Paul L Klarenbeek, Marieke E Doorenspleet, Giulia Balzaretti, Rebecca E E Esveldt, Barbera D C van Schaik, Aldo Jongejan, Sander W Tas, Antoine H C van Kampen, Frank Baas, Niek de Vries
Genetic and immunological evidence clearly points to a role for T cells in the pathogenesis of rheumatoid arthritis (RA). Selective targeting of such disease-associated T cell clones might be highly effective while having few side effects. However, such selective targeting may only be feasible if the same T cell clones dominate the immune response at different sites of inflammation. We leveraged high-throughput technology to quantitatively assess whether different T cell clones dominate the inflammatory infiltrate at various sites of inflammation in this prototypic autoimmune disease...
June 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
R S Hardy, C Fenton, A P Croft, A J Naylor, R Begum, G Desanti, C D Buckley, G Lavery, M S Cooper, K Raza
OBJECTIVE: In rheumatoid arthritis, the enzyme 11 beta-hydroxysteroid dehydrogenase type 1 (11β-HSD1) is highly expressed at sites of inflammation, where it converts inactive glucocorticoids (GC) to their active counterparts. In conditions of GC excess it has been shown to be a critical regulator of muscle wasting and bone loss. Here we examine the contribution of 11β-HSD1 to the pathology of persistent chronic inflammatory disease. METHODS: To determine the contribution of 11β-HSD1 to joint inflammation, destruction and systemic bone loss associated with persistent inflammatory arthritis, we generated mice with global and mesenchymal specific 11β-HSD1 deletions in the TNF-transgenic (TNF-tg) model of chronic polyarthritis...
June 8, 2018: Journal of Autoimmunity
Georgios Filippou, Garifallia Sakellariou, Carlo Alberto Scirè, Greta Carrara, Federica Rumi, Emanuela Bellis, Antonella Adinolfi, Alberto Batticciotto, Alessandra Bortoluzzi, Giovanni Cagnotto, Marta Caprioli, Marco Canzoni, Francesco Paolo Cavatorta, Orazio De Lucia, Valentina Di Sabatino, Antonella Draghessi, Ilaria Farina, Maria Cristina Focherini, Alessandra Gabba, Marwin Gutierrez, Luca Idolazzi, Filippo Luccioli, Pierluigi Macchioni, Marco Sergio Massarotti, Claudio Mastaglio, Luana Menza, Maurizio Muratore, Simone Parisi, Valentina Picerno, Matteo Piga, Roberta Ramonda, Bernd Raffeiner, Daniela Rossi, Silvia Rossi, Paola Rossini, Crescenzio Scioscia, Carlo Venditti, Alessandro Volpe, Annamaria Iagnocco
OBJECTIVE: To define the role of ultrasound (US) for the assessment of patients with rheumatoid arthritis (RA) in clinical remission, including joint and tendon evaluation. METHODS: A multicentre longitudinal study has been promoted by the US Study Group of the Italian Society for Rheumatology. 25 Italian centres participated, enrolling consecutive patients with RA in clinical remission. All patients underwent complete clinical assessment (demographic data, disease characteristics, laboratory exams, clinical assessment of 28 joints and patient/physician-reported outcomes) and Power Doppler (PD) US evaluation of wrist, metacarpalphalangeal joints, proximal interphalangeal joints and synovial tendons of the hands and wrists at enrolment, 6 and 12 months...
June 9, 2018: Annals of the Rheumatic Diseases
Nerea Mosquera, Angela Rodriguez-Trillo, Antonio Mera-Varela, Antonio Gonzalez, Carmen Conde
Rheumatoid arthritis (RA) is a systemic autoimmune disease including synovitis and synovial hyperplasia that contribute to joint destruction. Pivotal pathogenic mechanisms in this process are the dysregulated proliferation and apoptosis of fibroblast-like synoviocytes (FLS). Unfortunately, the mechanisms of FLS dysregulation are not completely elucidated. Here, we explored a new hypothesis based in the potent anti-proliferative and pro-apoptotic activity of retinoids in some types of cancer. Specifically, we investigated the role of retinoids and of the retinoic acid binding proteins, CRABP2 and FABP5, on the proliferation and apoptosis of FLS from RA by adding all-trans retinoic acid (ATRA) or silencing CRABP2 and FABP5...
June 7, 2018: Scientific Reports
Estefanía Armas-González, María Jesús Domínguez-Luis, Ana Díaz-Martín, Mayte Arce-Franco, Javier Castro-Hernández, Gabriela Danelon, Vanesa Hernández-Hernández, Sagrario Bustabad-Reyes, Alberto Cantabrana, Mariagrazia Uguccioni, Federico Díaz-González
BACKGROUND: B cells exert their pathogenic action in rheumatoid arthritis (RA) locally in the synovium. This study was undertaken to elucidate the chemokines responsible for the recruitment of B cells in the inflamed synovium, taking into account that the rich chemokine milieu present in the synovial tissue can fine-tune modulate discrete chemokine receptors. METHODS: Expression levels of chemokine receptors from the CC and CXC family, as well as CD27, were assessed by flow cytometry in CD20+ mononuclear cells isolated from the peripheral blood (PB) and synovial fluid (SF) of RA and psoriatic arthritis patients...
June 7, 2018: Arthritis Research & Therapy
Sungsin Jo, Sung Eun Wang, Young Lim Lee, Suman Kang, Bitnara Lee, Jinil Han, Il-Hoon Sung, Ye-Soo Park, Sang-Cheol Bae, Tae-Hwan Kim
BACKGROUND: IL-17A has recently emerged as a potential target that regulates the extensive inflammation and abnormal bone formation observed in ankylosing spondylitis (AS). Blocking IL-17A is expected to inhibit bony ankylosis. Here, we investigated the effects of anti IL-17A agents in AS. METHODS: TNFα, IL-17A, and IL-12/23 p40 levels in serum and synovial fluid from patients with ankylosing spondylitis (AS), rheumatoid arthritis (RA), osteoarthritis (OA), or healthy controls (HC) were measured by ELISA...
June 7, 2018: Arthritis Research & Therapy
Dragana Odobasic, Yuan Jia, Wenping Kao, Huapeng Fan, Xuemin Wei, Ran Gu, Devi Ngo, A Richard Kitching, Stephen R Holdsworth, Eric F Morand, Yuan H Yang
The effects of formyl peptide receptors (FPRs) on effector T cells and inflammation-causing tissue-resident cells are not well known. Here, we explored the effect of FPR activation on efferent T cell responses in models of rheumatoid arthritis (RA) and on the expansion of fibroblast-like synoviocytes (FLS). Compound 43 (Cpd43; FPR1/2 agonist) was administered to mice with collagen-induced arthritis (CIA) or antigen-induced arthritis (AIA) after disease onset. Joint inflammation/damage and immunity were assessed...
June 4, 2018: International Immunopharmacology
Carolina V Gorlino, Mabel N Dave, Rodrigo Blas, María Inés Crespo, Alicia Lavanchy, Héctor Tamashiro, Rodolfo Pardo-Hildalgo, María C Pistoresi-Palencia, María S Di Genaro
Rheumatoid arthritis (RA) is characterized by the presence of anti-citrullinated peptide antibodies (ACPAs) and neutrophils infiltrating the synovial fluid (SF) of the affected joints. The aim of this work was to analyze whether the presence of ACPAs in SF is associated with neutrophil infiltration and with their phenotype in the inflamed joints of RA patients. We found that in the presence of ACPAs, the number of synovial neutrophils correlated with severe disease activity. The SF were divided according to synovial ACPA levels in negative-(<25 U/ml), low-(25-200 U/ml) and high level (˃200 U/ml; ACPAhigh )...
June 7, 2018: European Journal of Immunology
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