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https://www.readbyqxmd.com/read/28447110/-diagnosis-and-therapy-of-benign-intraarticular-tumors
#1
REVIEW
H R Dürr, A Klein
Intraarticular benign tumors are rare lesions in many cases seen as incidental findings. One of the typical lesions is the diffuse or nodular form of pigmented villonodular synovitis, which needs a complete surgical removal. Magnetic Resonance Imaging (MRI) is diagnostic in most of the cases because of the intracellular iron content which shows an at least in some parts dark T2-sequence. Adjuvant therapies as radiosynoviorthesis should be considered in diffuse or recurrent lesions. Synovial Chondromatosis represents a metaplastic disorder of the synovial membrane resulting in the production of loose cartilage bodies...
April 26, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28446753/histamine-and-histamine-h4-receptor-promotes-osteoclastogenesis-in-rheumatoid-arthritis
#2
Kyoung-Woon Kim, Bo-Mi Kim, Kyung-Ann Lee, Sang-Heon Lee, Gary S Firestein, Hae-Rim Kim
Histamine H4 receptor (H4R) has immune-modulatory and chemotaxic effects in various immune cells. This study aimed to determine the osteoclastogenic role of H4R in rheumatoid arthritis (RA). The concentration of histamine in synovial fluid (SF) and sera in patients with RA was measured using ELISA. After RA SF and peripheral blood (PB) CD14+ monocytes were treated with histamine, IL-17, IL-21 and IL-22, and a H4R antagonist (JNJ7777120), the gene expression H4R and RANKL was determined by real-time PCR. Osteoclastogenesis was assessed by counting TRAP-positive multinucleated cells in PB CD14+ monocytes cultured with histamine, Th17 cytokines and JNJ7777120...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446218/increased-galectin-3-may-serve-as-a-serologic-signature-of-pre-rheumatoid-arthritis-while-markers-of-synovitis-and-cartilage-do-not-differ-between-early-undifferentiated-arthritis-subsets
#3
Saida Farah Issa, Anne Duer, Mikkel Østergaard, Kim Hørslev-Petersen, Merete L Hetland, Michael Sejer Hansen, Kirsten Junker, Hanne M Lindegaard, Jakob M Møller, Peter Junker
BACKGROUND: Undifferentiated arthritis (UA) is a label applied to patients with joint complaints which cannot be classified according to current criteria, which implies a need for precision diagnostic technologies. We studied serum galectin-3, a proinflammatory mediator, and seromarkers of structural joint elements in patients with early, UA and their associations with disease profile and biochemical and imaging findings. METHODS: One hundred and eleven UA patients were followed-up for at least 12 months and reclassified according to appropriate criteria (TUDAR)...
April 26, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28446208/calgizzarin-s100a11-a-novel-inflammatory-mediator-associated-with-disease-activity-of-rheumatoid-arthritis
#4
Lucie Andrés Cerezo, Barbora Šumová, Klára Prajzlerová, David Veigl, Dres Damgaard, Claus Henrik Nielsen, Karel Pavelka, Jiří Vencovský, Ladislav Šenolt
BACKGROUND: Calgizzarin (S100A11) is a member of the S100 protein family that acts in different tumors by regulating a number of biologic functions. Recent data suggest its association with low-grade inflammation in osteoarthritis (OA). The aim of our study is to compare S100A11 expression in the synovial tissues, synovial fluid and serum of patients with rheumatoid arthritis (RA) and osteoarthritis (OA) and to characterize the potential association between S100A11 and disease activity...
April 26, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28443382/diagnostic-imaging-modalities-and-surgical-anatomy-of-the-temporomandibular-joint-in-rabbits
#5
Michal Kyllar, Barbora Putnová, Vladimír Jekl, Ladislav Stehlík, Marcela Buchtová, Jan Štembírek
The temporomandibular joint (TMJ) is a condylar synovial joint that, together with the masticatory muscles, controls mandibular movement during mastication. The rabbit is often used as a model species for studying the mechanisms of TMJ diseases, and in regenerative research. However, there are significant differences between rabbit and human TMJs that should be taken into account before using this model for experimental research. Here, we use several analytical approaches (radiography, computed tomography and magnetic resonance imaging) to enable a detailed description and analysis of the rabbit TMJ morphology...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/28442184/pigmented-villonodular-synovitis-of-the-knee-a-retrospective-analysis-of-214-cases-at-a-uk-tertiary-referral-centre
#6
K H Patel, P D Gikas, R C Pollock, R W Carrington, S R Cannon, J A Skinner, T W Briggs, W J S Aston
AIMS: Pigmented villonodular synovitis (PVNS) is a rare, locally aggressive and potentially recurrent synovial disease. We present the largest single-centre experience of knee PVNS. Our aim was to evaluate our tertiary hospital's experience in the management of knee PVNS. PATIENTS AND METHODS: Retrospective data collection of consecutive cases of knee PVNS from 2002 to 2015. RESULTS: In total, 214 cases of knee PVNS were identified which represented 53...
April 22, 2017: Knee
https://www.readbyqxmd.com/read/28441721/pathogenic-or-therapeutic-extracellular-vesicles-in-rheumatic-diseases-role-of-mesenchymal-stem-cell-derived-vesicles
#7
REVIEW
Stella Cosenza, Maxime Ruiz, Marie Maumus, Christian Jorgensen, Danièle Noël
Extracellular vesicles (EVs) are important mediators of cell-to-cell communication pathways via the transport of proteins, mRNA, miRNA and lipids. There are three main types of EVs, exosomes, microparticles and apoptotic bodies, which are classified according to their size and biogenesis. EVs are secreted by all cell types and their function reproduces that of the parental cell. They are involved in many biological processes that regulate tissue homeostasis and physiopathology of diseases. In rheumatic diseases, namely osteoarthritis (OA) and rheumatoid arthritis (RA), EVs have been isolated from synovial fluid and shown to play pathogenic roles contributing to progression of both diseases...
April 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28441353/matrix-metalloproteinase-gene-activation-resulting-from-disordred-epigenetic-mechanisms-in-rheumatoid-arthritis
#8
REVIEW
Yasuto Araki, Toshihide Mimura
Matrix metalloproteinases (MMPs) are implicated in the degradation of extracellular matrix (ECM). Rheumatoid arthritis (RA) synovial fibroblasts (SFs) produce matrix-degrading enzymes, including MMPs, which facilitate cartilage destruction in the affected joints in RA. Epigenetic mechanisms contribute to change in the chromatin state, resulting in an alteration of gene transcription. Recently, MMP gene activation has been shown to be caused in RASFs by the dysregulation of epigenetic changes, such as histone modifications, DNA methylation, and microRNA (miRNA) signaling...
April 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28441054/biomechanical-and-histologic-evaluation-of-the-effects-of-underwater-treadmill-exercise-on-horses-with-experimentally-induced-osteoarthritis-of-the-middle-carpal-joint
#9
Melissa R King, Kevin K Haussler, Chris E Kawcak, C Wayne McIlwraith, Raoul F Reiser, David D Frisbie, Natasha M Werpy
OBJECTIVE To evaluate the effects of exercise in an underwater treadmill (UWT) on forelimb biomechanics and articular histologic outcomes in horses with experimentally induced osteoarthritis of the middle carpal joint. ANIMALS 16 horses. PROCEDURES An osteochondral fragment was induced arthroscopically (day 0) in 1 middle carpal joint of each horse. Beginning on day 15, horses were assigned to exercise in a UWT or in the UWT without water (simulating controlled hand walking) at the same speed, frequency, and duration...
May 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28441052/effects-of-hyaluronan-alone-or-in-combination-with-chondroitin-sulfate-and-n-acetyl-d-glucosamine-on-lipopolysaccharide-challenge-exposed-equine-fibroblast-like-synovial-cells
#10
Allison H Kilborne, Hayam Hussein, Alicia L Bertone
OBJECTIVE To investigate effects of hyaluronic acid (HA) or HA combined with chondroitin sulfate (CS) and N-acetyl-d-glucosamine (NAG) by use of a lipopolysaccharide (LPS) in vitro method. SAMPLE Monolayer cultures of synovial cells from 4 adult horses. PROCEDURES Synovial cell cultures were untreated or treated with HA alone or HA-CS-NAG for 24 hours, subsequently unchallenged or challenge-exposed with 2 LPS concentrations (20 and 50 ng/mL) for 2 hours, and retreated with HA or HA-CS-NAG for another 24 hours...
May 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28440447/anti%C3%A2-inflammatory-effects-of-oxymatrine-on-rheumatoid-arthritis-in-rats-via-regulating-the-imbalance-between-treg-and-th17-cells
#11
Ailing Ma, Yongya Yang, Qiuyang Wang, Yin Wang, Jing Wen, Yanli Zhang
Oxymatrine (OMT), a monosomic alkaloid extracted from the Chinese herb, Sophora flavescens Ait, has long been used as a traditional Chinese medicine for the treatment of inflammatory diseases. The aim of the present study was to investigate the potential anti‑inflammatory effect of OMT, and its modulation on imbalance between regulatory T (Treg) cells and T helper (Th) 17 cells in rats with collagen‑induced arthritis (CIA). Sprague‑Dawley rats were immunized with type II collagen and following a second collagen immunization, the rats were treated with OMT or dexamethasone (DXM) intraperitoneally once a day for 43 days...
April 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28439964/global-and-targeted-metabolomics-of-synovial-fluid-discovers-special-osteoarthritis-metabolites
#12
Kaidi Zheng, Shanmin Ni, Huaijun Chen, Shenmin Lou, Mengting Hu, Li Sun, Xinyu Yang
PURPOSE: To identify special metabolites in synovial fluid of osteoarthritis (OA) via a metabolomics approach. METHOD: Synovial fluid of 35 participants (25 OA patients and 10 controls) was detected by GC-TOF/MS and multivariate data analysis was applied to analyze correlation among the observations. Different metabolites were screened by VIP value (VIP > 1), student t test (p < 0.05), and fold change (fold > 1.5), and verified with the standard metabolites in the synovial fluid of 24 OA patients and 11 controls by LC/MS...
April 25, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28439423/rheumatoid-arthritis-what-do-mri-and-ultrasound-show
#13
EDITORIAL
Iwona Sudoł-Szopińska, Lennart Jans, James Teh
Rheumatoid arthritis is the most common inflammatory arthritis, affecting approximately 1% of the world's population. Its pathogenesis has not been completely understood. However, there is evidence that the disease may involve synovial joints, subchondral bone marrow as well as intra- and extraarticular fat tissue, and may lead to progressive joint destruction and disability. Over the last two decades, significant improvement in its prognosis has been achieved owing to new strategies for disease management, the emergence of new biologic therapies and better utilization of conventional disease-modifying antirheumatic drugs...
March 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28438869/correlation-between-expression-of-the-cancer-testis-antigen-kk-lc-1-and-helicobacter-pylori-infection-in-gastric-cancer
#14
Takashi Fukuyama, Nobue Futawatari, Yoshinobu Ichiki, Akiko Shida, Taiga Yamazaki, Yatsushi Nishi, Hiroshi Nonoguchi, Yoshihito Takahashi, Hitoshi Yamazaki, Noritada Kobayashi
BACKGROUND/AIM: Our previous study indicated that Kita-kyushu lung cancer antigen-1 (KK-LC-1) is a cancer/testis antigen (CTA) expressed in 82% of gastric cancer cases. Here, we investigated the relationship between KK-LC-1 expression and Helicobacter pylori infection in Japanese patients with gastric cancer. PATIENTS AND METHODS: We examined CTA expression in 25 surgical gastric cancer specimens and anti-H. pylori IgGs in the serum of each patient. RESULTS: KK-LC-1 was expressed in 80% of tumor samples, markedly higher than melanoma antigen gene (MAGE)-A1, MAGE-A3, MAGE-A4, synovial sarcoma, X breakpoint 4 (SSX4) and New York esophageal squamous cell carcinoma-1 (NY-ESO-1)...
May 2017: In Vivo
https://www.readbyqxmd.com/read/28438606/cell-origin-volume-and-arrangement-are-drivers-of-articular-cartilage-formation-morphogenesis-and-response-to-injury-in-mouse-limbs
#15
Rebekah S Decker, Hyo-Bin Um, Nathaniel A Dyment, Naiga Cottingham, Yu Usami, Motomi Enomoto-Iwamoto, Mark S Kronenberg, Peter Maye, David W Rowe, Eiki Koyama, Maurizio Pacifici
Limb synovial joints are composed of distinct tissues, but it is unclear which progenitors produce those tissues and how articular cartilage acquires its functional postnatal organization characterized by chondrocyte columns, zone-specific cell volumes and anisotropic matrix. Using novel Gdf5(CreERT2) (Gdf5-CE), Prg4-CE and Dkk3-CE mice mated to R26-Confetti or single-color reporters, we found that knee joint progenitors produced small non-migratory progenies and distinct local tissues over prenatal and postnatal time...
April 21, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28437495/a-practical-guide-to-understanding-and-treating-patellofemoral-pain
#16
John P Fulkerson
There is no shortcut to accurate diagnosis in the patellofemoral pain patient. Most important in the process is a desire and ability to specifically identify the structural and biomechanical origin of pain. This can be elusive and often requires a careful analysis of all factors affecting the patient, including documenting his or her specific history of pain origin and specific treatments to date, and acknowledging the patient's localization of the pain origin. Many patients can pinpoint the site of pain origin when given the time and encouragement to do so...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437494/patellofemoral-pain-an-enigma-explained-by-homeostasis-and-common-sense
#17
William R Post, Scott F Dye
We present a rational, scientific, low-risk approach to patellofemoral pain (anterior knee pain) based on an understanding of tissue homeostasis. Loss of tissue homeostasis from overload and/or injury produces pain. Bone overload and synovial inflammation are common sources of such pain. Chondromalacia and malalignment are findings that almost always do not need to be "corrected" to relieve pain. Patience and persistence in nonoperative care results in consistent success. Surgery should be rare and done only after extensive nonoperative management and in the setting of clearly defined pathology...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28436397/reduced-culture-time-and-improved-isolation-rate-through-culture-of-sonicate-fluid-in-blood-culture-bottles
#18
Viktor Janz, Andrej Trampuz, Carsten F Perka, Georgi I Wassilew
BACKGROUND AND OBJECTIVE: The aim of this study was to investigate if the cultivation of sonicate fluid (SFC) in blood culture bottles (BCB) leads to a higher rate of bacterial isolations than agar plate culture (APC) and to investigate whether the utilization of BCB leads to a reduction in culture time. METHODS: We performed a retrospective analysis of 206 revision total knee and total hip arthroplasty patients comparing the results of both synovial fluid culture and SFC in both BCB and conventional APC...
April 7, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28435577/intra-articular-localized-haemangioma-of-the-knee-mimicking-localized-pigmented-villonodular-synovitis-a-case-report
#19
G K Goki-Kamei, N M Norimasa-Matsubara, T T Teruyasu-Tanaka, K N Koji-Natsu, T S Toshihiro-Sugioka
Intra-articular synovial haemangioma of the knee is a benign tumour. However, diagnostic delay leads to degenerative changes in the cartilage and osteoarthritis due to recurrent haemarthrosis. Therefore, treatment should be performed immediately. We report the case of a localized synovial haemangioma arising from the medial plica in a 38-year old female presenting with pain and restricted range of motion in the right knee joint. Initially, we diagnosed this case as a localized pigmented villonodular synovitis (LPVS) based on MRI and arthroscopic findings and performed only arthroscopic en bloc excision of the mass and synovectomy around the mass for diagnostic confirmation...
March 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28433814/synovial-fluid-pro-inflammatory-profile-differs-according-to-the-characteristics-of-knee-pain
#20
Ying Ying Leung, Janet L Huebner, Benjamin Haaland, Steven Bak Siew Wong, Virginia Byers Kraus
OBJECTIVE: The role of inflammation and pain in osteoarthritis (OA) is not fully understood. We evaluated the association between pro-inflammatory biomarkers and pain. METHODS: We used baseline data and samples from a randomized controlled trial of colchicine for symptomatic knee OA. Severity of pain of the more symptomatic knee was assessed by NHANES-I criterion and WOMAC pain index. Pains on movement and at rest were self-reported on an 11-point Likert scale. Severity of radiographic tibiofemoral OA was assessed by Kellgren and Lawrence (KL) grade...
April 19, 2017: Osteoarthritis and Cartilage
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