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Monosodium urate crystal

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https://www.readbyqxmd.com/read/28425217/the-release-of-pro-inflammatory-cytokines-is-mediated-via-map-kinases-rather-than-inflammasome-signaling-pathway-in-keratinocytes
#1
Thomas Ondet, Béatrice Muscatelli-Groux, Cédric Coulouarn, Sacha Robert, Thomas Gicquel, Aude Bodin, Vincent Lagente, Jean-Alexis Grimaud
Toll like receptors (TLRs) are expressed in the skin and airway epithelial tissues, which are the most important sites of host-pathogen interactions. TLRs recognize the three-dimensional structure of pathogen associated molecules and are thus useful markers of the innate immune response. Here, we investigated the role of lipopolysaccharides (LPS) and monosodium urate (MSU) crystals in the activation of the TLR and Nod Like Receptors (NLR) pathways in human keratinocytes. Analysis of the inflammasome compounds revealed that NLRP3 and TLR4, both of which are components of inflammasome complexes involved in the activation of IL-1β, were not expressed in keratinocytes...
April 20, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28424907/the-added-value-of-synovial-fluid-centrifugation-for-monosodium-urate-and-calcium-pyrophosphate-crystal-detection
#2
D Boumans, M E Hettema, H E Vonkeman, R G Maatman, M A van de Laar
The aim of the study was to assess the added value of synovial fluid (SF) centrifugation for microscopic monosodium urate (MSU) and calcium pyrophosphate (CPP) crystal detection in patients with arthritis. This is a prospective observational study using SF samples from joints of patients undergoing joint arthrocentesis. Two blinded observers assessed the SF smears by polarized light microscopy for the presence of crystals before as well as after centrifugation. SF samples were collected from 98 patients with arthritis...
April 19, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28422890/an-unusual-location-of-gouty-panniculitis-a-case-report
#3
David Martin, Gaëtan-Romain Joliat, Pierre Fournier, Christophe Brunel, Nicolas Demartines, Olivier Gié
RATIONALE: Gouty panniculitis, characterised by the deposition of monosodium urate crystals in subcutaneous tissue, is a rare clinical manifestation of gout. PATIENT CONCERNS: The case of a 67-year-old man is reported, who presented an erythematous nodule on the upper part of the right buttock suspicious for an abscess. This was in the context of chemotherapy for non-Hodgkin's lymphoma. DIAGNOSES: Histopathologic examination demonstrated gouty panniculitis...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28390941/effects-of-gnaphalium-affine-d-don-on-hyperuricemia-and-acute-gouty-arthritis-anti-hyperuricemia-effect-through-xanthine-oxidase-uricosuric-action-and-anti-inflammatory-activity
#4
Hong-Jian Zhang, Ling-Nan Li, Jie Zhou, Qin-Qin Yang, Pei-Gang Liu, Pan Xu, Wei-Qing Liang, Lin Cheng, Ying-Qi Zhang, Jin-Bao Pu, Yi-Juan Hu
ETHNOPHARMACOLOGICAL RELEVANCE: The Gnaphalium affine D. Don is used in China as a folk medicine to treat gout, anti-inflammatory, antitussive and expectorant activities. The aim of this study was to evaluate the potential of the extract of G. affine to treat hyperuricemia and acute gouty arthritis in animal model. MATERIALS AND METHODS: G. affine extract was evaluated in an experimental model with potassium oxonate (PO) induced hyperuricemia in mice which was used to evaluate anti-hyperuricemia activity and xanthine oxidase (XO) inhibition...
April 5, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28376889/grape-seed-derived-procyanidins-alleviate-gout-pain-via-nlrp3-inflammasome-suppression
#5
Hai-Jiao Liu, Xiu-Xiu Pan, Bing-Qian Liu, Xuan Gui, Liang Hu, Chun-Yi Jiang, Yuan Han, Yi-Xin Fan, Yu-Lin Tang, Wen-Tao Liu
BACKGROUND: Gout is one of the common inflammatory arthritis which affects many people for inflicting unbearable pain. Macrophage-mediated inflammation plays an important role in gout. The uptake of monosodium urate (MSU) crystals by macrophages can lead to activation of NOD-like receptors containing a PYD 3 (NLRP3) inflammasome, thus accelerating interleukin (IL)-1β production. Reactive oxygen species (ROS) promoted development of the inflammatory process through NLRP3 inflammasome...
April 4, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28373994/neutrophil-extracellular-traps-and-microcrystals
#6
REVIEW
Balázs Rada
Neutrophil extracellular traps represent a fascinating mechanism by which PMNs entrap extracellular microbes. The primary purpose of this innate immune mechanism is thought to localize the infection at an early stage. Interestingly, the ability of different microcrystals to induce NET formation has been recently described. Microcrystals are insoluble crystals with a size of 1-100 micrometers that have different composition and shape. Microcrystals have it in common that they irritate phagocytes including PMNs and typically trigger an inflammatory response...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28349197/performance-of-the-2015-american-college-of-rheumatology-european-league-against-rheumatism-gout-classification-criteria-in-thai-patients
#7
Worawit Louthrenoo, Kanon Jatuworapruk, Panomkorn Lhakum, Nuttaya Pattamapaspong
To evaluate the sensitivity and specificity of the 2015 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) gout classification criteria in Thai patients presenting with acute arthritis in a real-life setting. Data were analyzed on consecutive patients presenting with arthritis of less than 2 weeks duration. Sensitivity and specificity were calculated by using the presence of monosodium urate (MSU) crystals in the synovial fluid or tissue aspirate as gold standard for gout diagnosis...
May 2017: Rheumatology International
https://www.readbyqxmd.com/read/28329594/perforating-gout-of-the-ear
#8
Leigh Sutton, Palak Parekh
Gout is the most common cause of inflammatory arthritis in men over 40 [1]. The prevalence of gout in the US is approximately 3.9%. Tophus is a characteristic sign of gout and results when monosodium urate deposits at the joint, skin, or cartilage. Tophi develop in 12-35% of patients who are diagnosed with gout [2]. We report a case of a 70-year-old man who was diagnosed with squamous cell carcinoma of the helix via shave biopsy. During Mohs micrographic surgery, a vigorous foreign-body reaction was noted. Review of the initial biopsy slides identified crystals with pseudoepitheliomatous hyperplasia (PEH) rendering a diagnosis of gout...
October 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28304005/cubital-tunnel-syndrome-secondary-to-gouty-tophi-a-case-report
#9
Hatice Resorlu, Coskun Zateri, Ayla Akbal, Ferhat Gokmen, Gurhan Adam, Serhad Bilim, Emre Bozkurt
Gout is a chronic rheumatic disease resulting from accumulation of monosodium urate crystals in tissues. The most important risk factor for the disease is hyperuricaemia. Precipitation of uric acid in the joint in the form of monosodium urate crystals is the main factor responsible for triggering attacks of arthritis. Tophi occur as a result of urate crystals that precipitate into joints and surrounding tissues. Tophi can erode the bone where they are located and cause compression in soft tissue due to a mass effect...
March 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28248892/a-repeated-carpal-tunnel-syndrome-due-to-tophaceous-gout-in-flexor-tendon-a-case-report
#10
Hui Lu, Qiang Chen, Hui Shen
RATIONALE: Gouty tophi is a rare cause of CTS. We first report a unique case of repeated CTS with gouty tophi in flexor tendon. In the previous literature, the symptoms cases of CTS were gradually increased. PATIENT CONCERNS: We report a 44-year-old male porter presented with mass on his left distal forearm combined a repeated carpal tunnel syndrome for 5 years. He felt numbness in fingers and his left palmar. The CTS symptoms had been eased through rest and dugs medication...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28240795/combining-hyperechoic-aggregates-and-the-double-contour-sign-increases-the-sensitivity-of-sonography-for-detection-of-monosodium-urate-deposits-in-gout
#11
Liang Zhu, Shengzhou Zheng, Wenwen Wang, Qijing Zhou, Huaxiang Wu
OBJECTIVES: To compare the sensitivities of individual and combined sonography of hyperechoic aggregates and the double-contour sign in detecting monosodium urate (MSU) crystal deposits in gouty joints. METHODS: Monosodium urate crystal deposits in symptomatic and contralateral asymptomatic joints of 70 patients with acute gout were evaluated by sonography of hyperechoic aggregates and the double-contour sign individually and in combination. All patients with acute gout in this study had at least 1 symptomatic joint with MSU deposits determined by dual-energy computed tomography...
May 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28238226/dual-energy-ct-in-gout-a-review-of-current-concepts-and-applications
#12
REVIEW
Hong Chou, Teck Yew Chin, Wilfred C G Peh
Dual-energy computed tomography (DECT) is a relatively recent development in the imaging of gouty arthritis. Its availability and usage have become increasingly widespread in recent years. DECT is a non-invasive method for the visualisation, characterisation and quantification of monosodium urate crystal deposits which aids the clinician in the early diagnosis, treatment and follow-up of this condition. This article aims to give an up to date review and summary of existing literature on the role and accuracy of DECT in the imaging of gout...
March 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/28229032/role-of-dual-energy-computed-tomography-imaging-in-the-diagnosis-of-gout
#13
REVIEW
Divya Jayakumar, Shiv T Sehra, Suneesh Anand, Gary W Stallings, Abhijeet Danve
Gout is a well-known inflammatory arthritis and affects four percent of the United States population. It results from the deposition of uric acid crystals in joints, tendons, bursae, and other surrounding tissues. Prevalence of gout has increased in the recent decade. Gout is usually seen in conjunction with other chronic comorbid conditions like cardiac disease, metabolic syndrome, and renal disease. The diagnosis of this inflammatory arthritis is confirmed by visualization of monosodium urate (MSU) crystals in the synovial fluid...
January 20, 2017: Curēus
https://www.readbyqxmd.com/read/28197935/anti-inflammatory-effect-of-total-saponin-fraction-from-dioscorea-nipponica-makino-on-gouty-arthritis-and-its-influence-on-nalp3-inflammasome
#14
Qi Zhou, Dong-Hua Yu, Ning Zhang, Shu-Min Liu
OBJECTIVE: To investigate the mechanism of Chinese herbal medicine Dioscorea nipponica for the treatment of monosodium urate crystals-induced gouty arthritis (GA) in rats. METHODS: Sixty male Wistar rats were divided into 6 groups: normal, model, indomethacin and three total saponin (900, 300 and 100 mg/kg) groups. The liver, kidney and serum levels of lysosomal enzymes, antioxidant capacities, and inflammatory factors were measured. In addition, the mRNA and protein levels of the NALP3 inflammasome components in the mononuclear cells of rats' peripheral blood were analyzed using real-time polymerase chain reaction and Western blotting methods, respectively...
February 15, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28167912/c5a-regulates-il-1%C3%AE-production-and-leukocyte-recruitment-in-a-murine-model-of-monosodium-urate-crystal-induced-peritonitis
#15
Hanif J Khameneh, Adrian W S Ho, Federica Laudisi, Heidi Derks, Matheswaran Kandasamy, Baalasubramanian Sivasankar, Gim Gee Teng, Alessandra Mortellaro
Gouty arthritis results from the generation of monosodium urate (MSU) crystals within joints. These MSU crystals elicit acute inflammation characterized by massive infiltration of neutrophils and monocytes that are mobilized by the pro-inflammatory cytokine IL-1β. MSU crystals also activate the complement system, which regulates the inflammatory response; however, it is unclear whether or how MSU-mediated complement activation is linked to IL-1β release in vivo, and the various roles that might be played by individual components of the complement cascade...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28148582/gout-a-guide-for-the-general-and-acute-physicians
#16
Abhishek Abhishek, Edward Roddy, Michael Doherty
Gout is the most prevalent inflammatory arthritis and affects 2.5% of the general population in the UK. It is also the only arthritis that has the potential to be cured with safe, inexpensive and well tolerated urate-lowering treatments, which reduce serum uric acid by either inhibiting xanthine oxidase - eg allopurinol, febuxostat - or by increasing the renal excretion of uric acid. Of these, xanthine oxidase inhibitors are used first line and are effective in 'curing' gout in the vast majority of patients...
February 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28147282/sr-b1-is-a-silica-receptor-that-mediates-canonical-inflammasome-activation
#17
Misato Tsugita, Nobuyuki Morimoto, Manabu Tashiro, Kengo Kinoshita, Masafumi Nakayama
The inhalation of silica dust is associated with fibrosis and lung cancer, which are triggered by macrophage inflammatory responses; however, how macrophages recognize silica remains largely unknown. Here, we identify by functional expression cloning the class B scavenger receptor SR-B1 as a silica receptor. Through an extracellular α-helix, both mouse and human SR-B1 specifically recognized amorphous and crystalline silica, but not titanium dioxide nanoparticles, latex nanoparticles, or monosodium urate crystals, although all particles exhibited negative surface potentials...
January 31, 2017: Cell Reports
https://www.readbyqxmd.com/read/28137404/relevant-aspects-of-imaging-in-the-diagnosis-and-management-of-gout
#18
Eloy De Avila Fernandes, Samuel Brighenti Bergamaschi, Tatiane Cantarelli Rodrigues, Gustavo Coelho Dias, Ralff Malmann, Germano Martins Ramos, Soraya Silveira Monteiro
Gout is an inflammatory arthritis characterized by the deposition of monosodium urate crystals in the synovial membrane, articular cartilage and periarticular tissues leading to inflammation. Men are more commonly affected, mainly after the 5th decade of life. Its incidence has been growing with the population aging. In the majority of the cases, the diagnosis is made by clinical criteria and synovial fluid analysis, in search for monosodium urate crystals. Nonetheless, gout may sometimes have atypical presentations, complicating the diagnosis...
January 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28089200/limitations-of-the-current-standards-of-care-for-treating-gout-and-crystal-deposition-in-the-primary-care-setting-a-review
#19
Robert T Keenan
PURPOSE: This article outlines several important issues regarding the management of patients with gout. The topics discussed include best practices for gout based on the most current guidelines, opportunities for improving gout management, and current and emerging therapies for gout. METHODS: [PubMed and Google Scholar databases] were search for all articles and trials published before 2016, using the key terms [hyperuricemia, gout, tophi, joint erosion, joint damage, treatment guidelines, American College of Rheumatology (ACR), European League Against Rheumatism (EULAR), flare, comorbidity, epidemiology, adherence, serum uric acid (sUA), monosodium urate (MSU), <6 mg/dL, MSU crystal formation, as well as individual drug names and classes of treatments of interest (allopurinol, febuxostat, colchicine, non-steroidal anti-inflammatories (NSAIDs)]...
February 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28078432/-evidence-based-recommendations-for-diagnostics-and-treatment-of-gouty-arthritis-in-the-specialist-sector-s2e-guidelines-of-the-german-society-of-rheumatology-in-cooperation-with-the-awmf
#20
REVIEW
U Kiltz, R Alten, M Fleck, K Krüger, B Manger, U Müller-Ladner, H Nüsslein, M Reuss-Borst, A Schwarting, H Schulze-Koops, A K Tausche, J Braun
Due to the increasing prevalence of gout, particularly in old age, the disease is becoming of increasing importance in Germany. Gout is one of the most common forms of recurrent inflammatory arthritis and is induced by the deposition of monosodium urate crystals in synovial fluid and other tissues. The principal goals of therapy in chronic gout are the symptomatic treatment of the acute joint inflammation and the causal treatment of the underlying metabolic cause, the hyperuricemia. Only a consistent and permanent reduction of the serum uric acid level ultimately results in an efficient avoidance of further gout attacks and therefore the prevention of structural damage...
March 2017: Zeitschrift Für Rheumatologie
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