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Monosodium urate crystal

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https://www.readbyqxmd.com/read/28732688/molecular-pathophysiology-of-gout
#1
REVIEW
Jyaysi Desai, Stefanie Steiger, Hans-Joachim Anders
Three contradictory clinical presentations of gout have puzzled clinicians and basic scientists for some time: first, the crescendo of sterile inflammation in acute gouty arthritis; second, its spontaneous resolution, despite monosodium urate (MSU) crystal persistence in the synovium; and third, immune anergy to MSU crystal masses observed in tophaceous or visceral gout. Here, we provide an update on the molecular pathophysiology of these gout manifestations, namely, how MSU crystals can trigger the auto-amplification loop of necroinflammation underlying the crescendo of acute gouty arthritis...
July 18, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/28730243/a-52-year-old-man-with-gouty-arthritis-and-erosive-lesion-in-the-hip
#2
Vitorino Modesto Dos Santos, Viviane Vieira Passini Soares, Priscilla Souza de Faria, Francisca Germanya Morais Borges Viana, Mayza Lemes Duarte
The case study of peripheral and axial gouty arthritis is described in a 52-year-old man without concomitant clinical evidence of tophaceus gout on physical evaluation on admission. Gout is a metabolic disorder related to excess of uric acid in the extracellular compartment, and deposition of monosodium urate crystals in the joints and other sites. Arthritis and tophi are major manifestations, which more often involve the peripheral joints asymmetrically. Chronic tophaceous gout commonly develops after a decade of recurrent polyarticular gout...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28721093/gout-mimicking-spondyloarthritis-case-report-and-literature-review
#3
Wenji Chen, Yanyan Wang, Yan Li, Zheng Zhao, Lixia Feng, Jian Zhu, Jianglin Zhang, Feng Huang
Gout is clinically characterized by episodes of monoarthritis, which not only typically affects the peripheral joints but also occasionally affect the axial joint, such as the sacroiliac joint (SIJ), and often mimics spondyloarthritis (SpA). Two cases of gout mimicking SpA are presented in the current paper. One patient was a 32-year-old man with a history of asymmetrical oligoarthritis of ankle and metatarsophalangeal joints (MTPJ). He had left gluteal pain for 2 weeks. Computed tomography (CT) and magnetic resonance imaging (MRI) revealed the bone erosion of the left SIJ...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28704909/tophaceous-gout-in-the-lumbar-spinal-canal-mimicking-epidural-spinal-tumor
#4
Taeshin Kim, Bum-Joon Kim, Se-Hoon Kim, Seung-Hwan Lee
Gout is an inflammatory arthritis characterized by deposition of monosodium urate crystals in joints. Though gout frequently involves the big toe or other extremities, it rarely occurs in the spinal canal. A 35-year-old man presented with left L5 radiculopathy. He had leg pain for 8 months and received several epidural steroid injections. Magnetic resonance imaging revealed a 1.7×1.1-cm ovoid contrast-enhancing mass, causing pressure erosion of the left L5 pedicle. Microscopic laminotomy was performed at the left L5 lamina...
June 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/28690186/ccl2-promoter-hypomethylation-is-associated-with-gout-risk-in-chinese-han-male-population
#5
Bin Li, Xiaoying Chen, Yuting Jiang, Yong Yang, Jie Zhong, Cong Zhou, Haochang Hu, Shiwei Duan
OBJECTIVES: C-C motif chemokine ligand 2 (CCL2) encodes a chemokine which amplifies and maintains inflammation through chemokine-cytokine networks. Gout is a type of painful inflammation arthritis in response to the deposition of monosodium urate (MSU) crystals in joints. The purpose of this study was to figure out the role of CCL2 promoter methylation in gout. METHODS: A quantitative methylation-specific polymerase chain reaction (qMSP) was used to measure CCL2 promoter methylation in 93 gout patients and 101 healthy controls, respectively...
July 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28689430/current-and-future-therapies-for-gout
#6
Tristan Pascart, Pascal Richette
Gout is a common disease responsible for recurrent flares triggered by the deposition of monosodium urate crystals secondary to longstanding hyperuricaemia. The management of gout implies both the treatment of flares and the treatment of hyperuricaemia itself. Recent improvement in the understanding of the disease led to the development of new drugs. Areas covered: This review covers data related to 'old' treatments of flares and hyperuricaemia, evidence on the recently approved drugs and emerging therapies in development...
July 10, 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28681117/-dual-energy-computed-tomography-diagnostics-for-gout
#7
H J Rech, A Cavallaro
BACKGROUND: Non-invasive imaging modalities are used for the morphological and functional evaluation and diagnosis of gout; however, none of these methods are sufficiently sensitive or specific for the diagnosis of gout. By the use of dual-energy computed tomography (DECT) the direct visualization of sodium urate deposition is now possible. Moreover, it is possible to show the different pathological situations, disease activity and monitoring of tophaceous gout. The positive DECT scan became one of the 2015 ACR/EULAR classification criteria for gout 2 years ago...
July 5, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28658988/updates-on-the-treatment-of-gout-including-a-review-of-updated-treatment-guidelines-and-use-of-small-molecule-therapies-for-difficult-to-treat-gout-and-gout-flares
#8
Rose Soskind, Daniel T Abazia, Mary Barna Bridgeman
Gout is a rheumatologic condition associated with elevated serum uric acid levels and deposition of monosodium urate crystals in joints and soft tissues. Areas covered: In this article, we describe the role of currently available drug therapies for managing acute gout flares and used in reducing serum urate levels. Further, we explore the role of novel small molecular therapies and biologic agents in the treatment of refractory or severe gout symptoms. A literature search of MEDLINE and MEDLINE In-Process & Other Non-Indexed Citations Databases (1996-June 2017) was conducted utilizing the key words 'gout', 'interleukin-1 inhibitors', 'acute gout', 'gout treatment', 'urate lowering therapies', 'hyperuricemia', 'colchicine', 'pegloticase', 'lesinurad', 'xanthine oxidase', 'xanthine oxidase inhibitors', 'allopurinol', 'febuxostat', 'uricosurics', 'probenecid', and 'benzbromarone'...
August 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28630380/the-immunological-basis-in-the-pathogenesis-of-gout
#9
Junwei Chen, Meng Wu, Jinhua Yang, Jing Wang, Yue Qiao, Xiaofeng Li
Gout is an inflammatory arthritis characterized by red, tender, hot and tumid joints. The development cause and process of gout is very sophisticated; recent studies, notwithstanding, have offered novel perspectives on the mechanism from an immunological viewpoint. The pathological process of gout involves both innate and adaptive immune responses. Other studies have demonstrated that gout development is associated with the presence of monosodium urate (MSU) crystals which serve as a "danger signal" affecting certain immune cells, cytokine production, and effector molecule expression, triggering both types of immune responses...
June 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28623927/caffeoylquinic-acid-derivatives-rich-extract-from-gnaphalium-pensylvanicum-willd-ameliorates-hyperuricemia-and-acute-gouty-arthritis-in-animal-model
#10
Yan Jiang, Yan Lin, Yi-Juan Hu, Xiao-Jun Song, Hong-Hua Pan, Hong-Jian Zhang
BACKGROUND: The Gnaphalium pensylvanicum willd. is used in China as a folk medicine to treat anti-inflammatory, cough and rheumatism arthritis. The aim of this study was to evaluate the potential of the extract of G. pensylvanicum to treat hyperuricemia and acute gouty arthritis in animal model. METHODS: G. pensylvanicum 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...
June 17, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28617199/an-optimal-ultrasonographic-diagnostic-test-for-early-gout-a-prospective-controlled-study
#11
Eleonora Norkuviene, Mykolas Petraitis, Indre Apanaviciene, Dalia Virviciute, Asta Baranauskaite
Objective To identify the optimal sites for classification of early gout by ultrasonography. Methods Sixty patients with monosodium urate crystal-proven gout (25 with early gout [≤2-year symptom duration], 35 with late gout [>2-year symptom duration], and 36 normouricemic healthy controls) from one centre were prospectively evaluated. Standardized blinded ultrasound examination of 36 joints and the triceps and patellar tendons was performed to identify tophi and the double contour (DC) sign. Results Ultrasonographic sensitivity was lower in early than late gout...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28550118/s100a9-potentiates-the-activation-of-neutrophils-by-the-etiological-agent-of-gout-monosodium-urate-crystals
#12
Louis-Simon Rousseau, Guillaume Paré, Asmaa Lachhab, Paul H Naccache, François Marceau, Philippe Tessier, Martin Pelletier, Maria Fernandes
Gout is one of the most painful types of arthritis that arises when the body mounts an acute inflammatory reaction against a crystallized form of uric acid known as monosodium urate crystals (MSUs). Although MSUs are known to activate neutrophils, the most abundant leukocyte in the synovial fluid of patients with gout, few studies have investigated the effect on neutrophils of the simultaneous stimulation with MSU and proinflammatory mediators in the inflamed joint. Herein, we focused on a protein that is highly expressed in the synovium in gout, S100A9...
May 26, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28539925/cxcl9-derived-peptides-differentially-inhibit-neutrophil-migration-in-vivo-through-interference-with-glycosaminoglycan-interactions
#13
Vincent Vanheule, Daiane Boff, Anneleen Mortier, Rik Janssens, Björn Petri, Elzbieta Kolaczkowska, Paul Kubes, Nele Berghmans, Sofie Struyf, Andreas J Kungl, Mauro Martins Teixeira, Flavio Almeida Amaral, Paul Proost
Several acute and chronic inflammatory diseases are driven by accumulation of activated leukocytes due to enhanced chemokine expression. In addition to specific G protein-coupled receptor-dependent signaling, chemokine-glycosaminoglycan (GAG) interactions are important for chemokine activity in vivo. Therefore, the GAG-chemokine interaction has been explored as target for inhibition of chemokine activity. It was demonstrated that CXCL9(74-103) binds with high affinity to GAGs, competed with active chemokines for GAG binding and thereby inhibited CXCL8- and monosodium urate (MSU) crystal-induced neutrophil migration to joints...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28508104/quercetin-inhibits-gout-arthritis-in-mice-induction-of-an-opioid-dependent-regulation-of-inflammasome
#14
Kenji W Ruiz-Miyazawa, Larissa Staurengo-Ferrari, Sandra S Mizokami, Talita P Domiciano, Fabiana T M C Vicentini, Doumit Camilios-Neto, Wander R Pavanelli, Phileno Pinge-Filho, Flávio A Amaral, Mauro M Teixeira, Rubia Casagrande, Waldiceu A Verri
We investigated the anti-inflammatory and analgesic effects of quercetin in monosodium urate crystals (MSU)-induced gout arthritis, and the sensitivity of quercetin effects to naloxone, an opioid receptor antagonist. Mice were treated with quercetin, and mechanical hyperalgesia was assessed at 1-24 h after MSU injection. In vivo, leukocyte recruitment, cytokine levels, oxidative stress, NFκB activation, and gp91(phox) and inflammasome components (NLRP3, ASC, Pro-caspase-1, and Pro-IL-1β) mRNA expression by qPCR were determined in the knee joints at 24 h after MSU injection...
May 15, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28484006/uric-acid-priming-in-human-monocytes-is-driven-by-the-akt-pras40-autophagy-pathway
#15
Tania O Crişan, Maartje C P Cleophas, Boris Novakovic, Kathrin Erler, Frank L van de Veerdonk, Hendrik G Stunnenberg, Mihai G Netea, Charles A Dinarello, Leo A B Joosten
Metabolic triggers are important inducers of the inflammatory processes in gout. Whereas the high serum urate levels observed in patients with gout predispose them to the formation of monosodium urate (MSU) crystals, soluble urate also primes for inflammatory signals in cells responding to gout-related stimuli, but also in other common metabolic diseases. In this study, we investigated the mechanisms through which uric acid selectively lowers human blood monocyte production of the natural inhibitor IL-1 receptor antagonist (IL-1Ra) and shifts production toward the highly inflammatory IL-1β...
May 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28467984/neutrophil-extracellular-traps-stimulate-proinflammatory-responses-in-human-airway-epithelial-cells
#16
Florencia Sabbione, Irene A Keitelman, Leonardo Iula, Mariana Ferrero, Mirta N Giordano, Pablo Baldi, Martín Rumbo, Carolina Jancic, Analía S Trevani
Tissue injury leads to the release of uric acid (UA). At high local concentrations, UA can form monosodium urate crystals (MSU). MSU and UA stimulate neutrophils to release extracellular traps (NET). Here, we investigated whether these NET could be involved in the development of inflammation by stimulating cytokine release by airway epithelial cells. We found that NET significantly increased the secretion of CXCL8/IL-8 and IL-6 by alveolar and bronchial epithelial cells. These effects were not observed when NETosis was inhibited by Diphenyleneiodonium, elastase inhibitor, or Cl-amidine...
2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28464949/monosodium-urate-crystal-deposition-associated-with-the-progress-of-radiographic-grade-at-the-sacroiliac-joint-in-axial-spa-a-dual-energy-ct-study
#17
Junqing Zhu, Aiwu Li, Ertao Jia, Yi Zhou, Juan Xu, Shixian Chen, Yinger Huang, Xiang Xiao, Juan Li
BACKGROUND: Previous studies have revealed that ankylosing spondylitis (AS), as the progenitor of axial spondyloarthritis (AxSpA), has been characterized by the insidiously progressive nature of sacroiliitis and spondylitis. Dual-energy computed tomography (DECT) has recently been used to analyse the deposition of monosodium urate (MSU) crystals with higher sensitivity and specificity. However, it remains unclear whether the existence of the MSU crystal deposition detected by DECT at the sacroiliac joint in patients with AxSpA also is associated with the existing structural damage...
May 2, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28457098/crystal-induced-arthropathy-in-elderly-patients-hospitalized-for-acute-conditions
#18
Andrew Villion, Zeev Arinzon, Jacob Feldman, Oded Kimchi, Yitshal Berner
BACKGROUND: Arthritis and arthralgia are painful symptoms experienced by many elderly patients during hospitalization. Crystal-induced arthritis (CIA) is one of the most common causes of arthritis worldwide and represents the most common cause of acute arthritis in the elderly. OBJECTIVES: To determine the incidence of both acute new onset or acute exacerbation of CIA among elderly patients hospitalized due to an acute medical illness. METHODS: This study comprised 85 patients...
March 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28456576/influence-of-the-total-saponin-fraction-from-dioscorea-nipponica-makino-on-tlr2-4-il1r-receptor-singnal-pathway-in-rats-of-gouty-arthritis
#19
Qi Zhou, Fang Fang Lin, Shu Min Liu, Xiao Fang Sui
ETHNOPHARMACOLOGICAL RELEVANCE: Dioscorea nipponica Makino have been extensively used in traditional medicine for the treatment of arthritic diseases, particularly gouty arthritis (GA). MATERIALS AND METHODS: Sixty male Wistar rats were divided into six groups: the normal group, model group, colchicine group (COL) and three total saponin groups (RDN) (high dose [160mg/kg], middle dose [80mg/kg] and low dose [40mg/kg]). The mRNA and protein expression levels of TLR2, TLR4, IRAK1, TRAF6, TAK1, IKKα, IκBα and NF-κB in the synovial tissue of joint were detected by realtime PCR and WB methods respectively...
July 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28456346/management-of-gout-and-hyperuricemia-in-ckd
#20
Ana Beatriz Vargas-Santos, Tuhina Neogi
Hyperuricemia and gout, the clinical manifestation of monosodium urate crystal deposition, are common in patients with chronic kidney disease (CKD). Although the presence of CKD poses additional challenges in gout management, effective urate lowering is possible for most patients with CKD. Initial doses of urate-lowering therapy are lower than in the non-CKD population, whereas incremental dose escalation is guided by regular monitoring of serum urate levels to reach the target level of <6mg/dL (or <5mg/dL for patients with tophi)...
April 26, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
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