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https://www.readbyqxmd.com/read/28329594/perforating-gout-of-the-ear
#1
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/28324150/stress-stones-stress-recurrent-stones-a-self-propagating-cycle-difficulties-in-solving-this-dichotomy
#2
Montserrat Arzoz-Fabregas, Josep Roca-Antonio, Luis Ibarz-Servio, Dalielah Jappie-Mahomed, Allen Rodgers
Numerous studies have reported an association between stress and urolithiasis. Although urinary risk factors have been measured in several of these, compelling evidence of a causal relationship has not been established. A shortcoming is that alterations in single urinary parameters rather than ratios and quotients, which provide a more synergistic risk evaluation, have been measured. Recently, we speculated about a possible association between chronic stress and stone recurrence. This presents an intriguing dichotomy of whether stress causes stones or vice versa, or whether they are linked in a self-propagating stress-stones-stress-recurrence cycle...
March 21, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28317621/uric-acid-excretion-predicts-increased-blood-pressure-among-american-adolescents-of-african-descent
#3
Sylvie Mrug, Michal Mrug, Anjana Madan Morris, Nina Reynolds, Anita Patel, Danielle C Hill, Daniel I Feig
BACKGROUND: Hyperuricemia predicts the incidence of hypertension in adults and its treatment has blood pressure (BP)-lowering effects in adolescents. To date, no studies have examined the predictive usage of hyperuricemia or urinary uric acid excretion on BP changes in adolescents. Mechanistic models suggest that uric acid impairs both endothelial function and vascular compliance, which would potentially exacerbate a myriad of hypertensive mechanisms, yet little is known about interaction of uric acid and other hypertension risk factors...
April 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28316939/application-of-established-pathophysiologic-processes-brings-greater-clarity-to-diagnosis-and-treatment-of-hyponatremia
#4
EDITORIAL
John K Maesaka, Louis J Imbriano, Nobuyuki Miyawaki
Hyponatremia, serum sodium < 135 mEq/L, is the most common electrolyte abnormality and is in a state of flux. Hyponatremic patients are symptomatic and should be treated but our inability to consistently determine the causes of hyponatremia has hampered the delivery of appropriate therapy. This is especially applicable to differentiating syndrome of inappropriate antidiuresis (SIAD) from cerebral salt wasting (CSW) or more appropriately, renal salt wasting (RSW), because of divergent therapeutic goals, to water-restrict in SIAD and administer salt and water in RSW...
March 6, 2017: World Journal of Nephrology
https://www.readbyqxmd.com/read/28314755/a-randomised-controlled-trial-of-the-efficacy-and-safety-of-allopurinol-dose-escalation-to-achieve-target-serum-urate-in-people-with-gout
#5
Lisa K Stamp, Peter T Chapman, Murray L Barclay, Anne Horne, Christopher Frampton, Paul Tan, Jill Drake, Nicola Dalbeth
OBJECTIVES: To determine the efficacy and safety of allopurinol dose escalation using a treat-to-target serum urate (SU) approach. METHODS: A randomised, controlled, parallel-group, comparative clinical trial was undertaken. People with gout receiving at least creatinine clearance (CrCL)-based allopurinol dose for ≥1 month and SU ≥6 mg/dL were recruited. Participants were randomised to continue current dose (control) or allopurinol dose escalation for 12 months...
March 17, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28304005/cubital-tunnel-syndrome-secondary-to-gouty-tophi-a-case-report
#6
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/28300027/cystic-calculus-in-a-laboratory-housed-green-anole-anolis-carolinensis
#7
Leslie L Birke Ann M Cespedes Emma R Schachner And Simon P Lailvaux
An adult, male, wild-caught, laboratory-housed green anole (Anolis carolinensis) on a locomotor performance study was presented for anorexia. The anole exhibited a 26% weight loss and a thin body condition but was otherwise alert and active. Despitesupportive care, the anole's clinical condition deteriorated, necessitating euthanasia. Postmortem examination revealed a 4.5 mm × 2.5-mm cystic calculus, which consisted entirely of sodium urate. Here we describe the clinical findings and locomotor consequences of this disease in a green anole...
March 15, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28291044/advances-in-urate-lowering-therapy-time-to-revisit-high-dose-febuxostat
#8
Aryeh M Abeles
No abstract text is available yet for this article.
March 9, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28288895/nanocapsules-of-therapeutic-proteins-with-enhanced-stability-and-long-blood-circulation-for-hyperuricemia-management
#9
Xiaopei Zhang, Duo Xu, Xin Jin, Gan Liu, Sheng Liang, Hui Wang, Wei Chen, Xinyuan Zhu, Yunfeng Lu
Among a broad spectrum of medical treatments, protein therapeutics holds tremendous opportunities for the treatment of metabolic disorders, cancer, autoimmune diseases and etc. Broad adaption of protein therapeutics, however, still remain challenging, not only because of poor protein stability, but they also experience fast clearance after administrated and elicit immune responses, resulting in undesirable biodistribution and short blood residence time. In this study, we demonstrate a novel protein delivery method via encapsulating therapeutic proteins within thin shells of poly(N-vinylpyrrolidone) (PVP), which leads to significantly improved protein stability, reduced macrophage uptake, prolonged circulation time and reduced immunogenicity...
March 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28287162/synergistic-degradation-of-a-hyperuricemia-causing-metabolite-using-one-pot-enzyme-nanozyme-cascade-reactions
#10
Secheon Jung, Inchan Kwon
Multi-enzyme cascade reactions are frequently found in living organisms, in particular when an intermediate should be eliminated. Recently, enzyme-mimic nanomaterials (nanozymes) received much attention for various applications, because they are usually more stable and cost-effective than enzymes. However, enzyme-nanozyme cascade reations have not been yet extensively exploited. Therefore, in this study, we investigated one-pot enzyme-nanozyme cascade reactions using urate oxidase (UOX) and catalase-mimic gold nanoparticle nanozyme (AuNP) with the ultimate goal of treatment of hyperuricemia...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28286646/primary-prevention-of-cardiovascular-disease-a-review-of-contemporary-guidance-and-literature
#11
REVIEW
Jack Stewart, Gavin Manmathan, Peter Wilkinson
Cardiovascular disease is a significant and ever-growing problem in the United Kingdom, accounting for nearly one-third of all deaths and leading to significant morbidity. It is also of particular and pressing interest as developing countries experience a change in lifestyle which introduces novel risk factors for cardiovascular disease, leading to a boom in cardiovascular disease risk throughout the developing world. The burden of cardiovascular disease can be ameliorated by careful risk reduction and, as such, primary prevention is an important priority for all developers of health policy...
January 2017: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/28283767/seasonal-variations-of-urate-in-a-swedish-adult-population
#12
Axel Åkerblom, Johanna Helmersson-Karlqvist, Tomas Weitoft, Anders Larsson
Seasonality in the incidence and prevalence of gout has previously been reported but the cause of this seasonality in gout is not explained. The aim of this study was to evaluate possible seasonal variations of urate in a large unselected Swedish adult population. We analyzed 170,915 urate test results from patients at a tertiary care hospital between 2000 and 2016. The results were divided according to sex and sampling month of the year. The median urate values were overall higher in males compared to females and both males and females had peak urate concentrations in the summer months (June-August)...
March 10, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28282408/the-renal-phenotype-of-allopurinol-treated-hprt-deficient-mouse
#13
Cristina Zennaro, Federica Tonon, Paola Zarattini, Milan Clai, Alessandro Corbelli, Michele Carraro, Marialaura Marchetti, Luca Ronda, Gianluca Paredi, Maria Pia Rastaldi, Riccardo Percudani
Excess of uric acid is mainly treated with xanthine oxidase (XO) inhibitors, also called uricostatics because they block the conversion of hypoxanthine and xanthine into urate. Normally, accumulation of upstream metabolites is prevented by the hypoxanthine-guanine phosphoribosyltransferase (HPRT) enzyme. The recycling pathway, however, is impaired in the presence of HPRT deficiency, as observed in Lesch-Nyhan disease. To gain insights into the consequences of purine accumulation with HPRT deficiency, we investigated the effects of the XO inhibitor allopurinol in Hprt-lacking (HPRT-/-) mice...
2017: PloS One
https://www.readbyqxmd.com/read/28281462/ultrasound-sensitivity-to-changes-in-gout-a-longitudinal-study-after-two-years-of-treatment
#14
Diana Peiteado, Alejandro Villalba, Emilio Martín-Mola, Alejandro Balsa, Eugenio De Miguel
OBJECTIVES: The goals of our study are to evaluate the urate-lowering therapy (ULT) effect on gout ultrasound (US) lesions and to explore US sensitivity to change in gout patients. METHODS: Patients with chronic and symptomatic gout, confirmed by crystal identification, were prospectively included. Clinical and US assessments were performed at baseline and after 6, 12 and 24 months of ULT. The presence of double contour sign (DCS) and US- detectable tophi were assessed in the first metatarsophalangeals, the knees and patellar tendons...
March 3, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28281141/oxidative-potential-op-and-mineralogy-of-iron-ore-particulate-matter-at-the-gol-e-gohar-mining-and-industrial-facility-iran
#15
Naghmeh Soltani, Behnam Keshavarzi, Armin Sorooshian, Farid Moore, Christina Dunster, Ana Oliete Dominguez, Frank J Kelly, Prakash Dhakal, Mohamad Reza Ahmadi, Sina Asadi
Concentrations of total suspended particulate matter, particulate matter with aerodynamic diameter <2.5 μm (PM2.5), particulate matter <10 μm (PM10), and fallout dust were measured at the Iranian Gol-E-Gohar Mining and Industrial Facility. Samples were characterized in terms of mineralogy, morphology, and oxidative potential. Results show that indoor samples exceeded the 24-h PM2.5 and PM10 mass concentration limits (35 and 150 µg m(-3), respectively) set by the US National Ambient Air Quality Standards...
March 9, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28272834/urate-oxidase-for-the-prevention-and-treatment-of-tumour-lysis-syndrome-in-children-with-cancer
#16
REVIEW
Daniel Kl Cheuk, Alan Ks Chiang, Godfrey Cf Chan, Shau Yin Ha
BACKGROUND: Tumour lysis syndrome (TLS) is a serious complication of malignancies and can result in renal failure or death. Previous reviews did not find clear evidence of benefit of urate oxidase in children with cancer. This review is the second update of a previously published Cochrane review. OBJECTIVES: To assess the effects and safety of urate oxidase for the prevention and treatment of TLS in children with malignancies. SEARCH METHODS: In March 2016 we searched CENTRAL, MEDLINE, Embase, and CINAHL...
March 8, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28270222/population-specific-association-between-abcg2-variants-and-tophaceous-disease-in-people-with-gout
#17
Wendy He, Amanda Phipps-Green, Lisa K Stamp, Tony R Merriman, Nicola Dalbeth
BACKGROUND: Tophi contribute to musculoskeletal disability, joint damage and poor health-related quality of life in people with gout. The aim of this study was to examine the role of SLC2A9 and ABCG2 variants in tophaceous disease in people with gout. METHODS: Participants (n = 1778) with gout fulfilling the 1977 American Rheumatism Association (ARA) classification criteria, who were recruited from primary and secondary care, attended a detailed study visit...
March 7, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28270201/exploration-of-haplotype-research-consortium-imputation-for-genome-wide-association-studies-in-20-032-generation-scotland-participants
#18
Reka Nagy, Thibaud S Boutin, Jonathan Marten, Jennifer E Huffman, Shona M Kerr, Archie Campbell, Louise Evenden, Jude Gibson, Carmen Amador, David M Howard, Pau Navarro, Andrew Morris, Ian J Deary, Lynne J Hocking, Sandosh Padmanabhan, Blair H Smith, Peter Joshi, James F Wilson, Nicholas D Hastie, Alan F Wright, Andrew M McIntosh, David J Porteous, Chris S Haley, Veronique Vitart, Caroline Hayward
BACKGROUND: The Generation Scotland: Scottish Family Health Study (GS:SFHS) is a family-based population cohort with DNA, biological samples, socio-demographic, psychological and clinical data from approximately 24,000 adult volunteers across Scotland. Although data collection was cross-sectional, GS:SFHS became a prospective cohort due to of the ability to link to routine Electronic Health Record (EHR) data. Over 20,000 participants were selected for genotyping using a large genome-wide array...
March 7, 2017: Genome Medicine
https://www.readbyqxmd.com/read/28258276/gypenosides-inhibits-xanthine-oxidoreductase-and-ameliorates-urate-excretion-in-hyperuricemic-rats-induced-by-high-cholesterol-and-high-fat-food-lipid-emulsion
#19
Minxia Pang, Yingying Fang, Suhong Chen, Xuexin Zhu, Chaowen Shan, Jie Su, Jingjing Yu, Bo Li, Yao Yang, Bo Chen, Kailun Liang, Huiming Hu, Guiyuan Lv
BACKGROUND The aim of this study was to study the effects of gypenosides (GPS) on lowering uric acid (UA) levels in hyperuricemic rats induced by lipid emulsion (LE) and the related mechanisms. GPS are natural saponins extracted from Gynostemma pentaphyllum. MATERIAL AND METHODS Forty-eight male SD rats were randomly divided into six groups: normal, model, two positive controls, and two GPS treated groups (two different doses of GPS). The normal group rats were fed a basic diet, and the other rats were orally pretreated with LE...
March 4, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28255846/peroxisomes-proliferation-and-pharmacological-stimulation-of-autophagy-in-rat-liver-evidence-to-support-that-autophagy-may-remove-the-older-peroxisomes
#20
Gabriella Cavallini, Alessio Donati, Michele Taddei, Ettore Bergamini
Like mitochondria, peroxisomes produce reactive oxygen species (ROS), compounds which have been implicated to play an important role in many degenerative diseases and aging itself, and an exaggerated ROS production might occur in altered or older organelles. Growing evidence shows that autophagy, a required function in cell housekeeping during fasting, can remove damaged macromolecules, organelles, and membranes selectively. Proliferation of peroxisomes can be enhanced in liver cells by perfluorooctanoic acid (PFOA), which causes a marked increase of the Acyl-CoA oxidase (ACOX) activity and no significant change in urate oxidase (UOX) activity...
March 2, 2017: Molecular and Cellular Biochemistry
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