Is uric acid protective or deleterious in acute ischemic stroke? A prospective cohort study

“…Allopurinol treatment also protects the heart from ischemic reperfusion [77] , and oxypurinol, an allopurinol derivative, improves the left ventricular ejection fraction (LVEF) in congestive heart failure patients with low LVEF [22] . Despite the numerous aforementioned studies, several studies have indicated that no association between UA and ischemic stroke [78] or heart disease [79] exists.…”

Section: Nephropathymentioning

confidence: 99%

Linking uric acid metabolism to diabetic complications

Kushiyama

Tanaka

Hara

et al. 2014

WJD

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Hyperuricemia have been thought to be caused by the ingestion of large amounts of purines, and prevention or treatment of hyperuricemia has intended to prevent gout. Xanthine dehydrogenase/xanthine oxidase (XDH/ XO) is rate-limiting enzyme of uric acid generation, and allopurinol was developed as a uric acid (UA) generation inhibitor in the 1950s and has been routinely used for gout prevention since then. Serum UA levels are an important risk factor of disease progression for various diseases, including those related to lifestyle. Recently, other UA generation inhibitors such as febuxostat and topiroxostat were launched. The emergence of these novel medications has promoted new research in the field. Lifestyle-related diseases, such as metabolic syndrome or type 2 diabetes mellitus, often have a common pathological foundation. As such, hyperuricemia is often present among these patients. Many in vitro and animal studies have implicated inflammation and oxidative stress in UA metabolism and vascular injury because XDH/XO act as one of the major source of reactive oxygen species Many studies on UA levels and associated diseases implicate involvement of UA generation in disease onset and/or progression. Interventional studies for UA generation, not UA excretion revealed XDH/XO can be the therapeutic target for vascular injury and renal dysfunction. In this review, the relationship between UA metabolism and diabetic complications is highlighted.© 2014 Baishideng Publishing Group Inc. All rights reserved.Key words: Uric acid; Xanthine dehydrogenase/xanthine oxidase; Diabetes mellitus; Diabetic complications; Xanthine oxidase inhibitor; Metabolism Core tip: Uric acid (UA) is derived from essential metabolism, and UA metabolism is becoming a novel risk and interventional factor of lifestyle-related diseases in this obesity-prone era. The relationship between UA metabolism and diabetic complications is highlighted in this review and supposed molecular mechanisms are mentioned.Kushiyama A, Tanaka K, Hara S, Kawazu S. Linking uric acid metabolism to diabetic complications. World J Diabetes 2014; 5(6): 787-795 Available from:

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“…This was confirmed in different studies that reported increased levels of serum uric acid in metabolic disorders and cancer (2-4). However, recent studies have reported possible beneficial effects of uric acid, especially in cardiovascular and neurological diseases of late onset (5,6). Possible protective effects are due to a strong antioxidant properties of uric acid (7).…”

mentioning

confidence: 99%

Predictive Value of 8 Genetic Loci for Serum Uric Acid Concentration

et al. 2010

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AimTo investigate the value of genomic information in prediction of individual serum uric acid concentrations.Methods Three population samples were investigated: from isolated Adriatic island communities of Vis (n = 980) and Korčula (n = 944), and from general population of the city of Split (n = 507). Serum uric acid concentration was correlated with the genetic risk score based on 8 previously described genes: PDZK1, GCKR, SLC2A9, ABCG2, LR-RC16A, SLC17A1, SLC16A9, and SLC22A12, represented by a total of 16 single-nucleotide polymorphisms (SNP). The data were analyzed using classification and regression tree (CART) and general linear modeling. ResultsThe most important variables for uric acid prediction with CART were genetic risk score in men and age in women. The percent of variance for any single SNP in predicting serum uric acid concentration varied from 0.0%-2.0%. The use of genetic risk score explained 0.1%-2.5% of uric acid variance in men and 3.9%-4.9% in women. The highest percent of variance was obtained when age, sex, and genetic risk score were used as predictors, with a total of 30.9% of variance in pooled analysis. ConclusionDespite overall low percent of explained variance, uric acid seems to be among the most predictive human quantitative traits based on the currently available SNP information. The use of genetic risk scores is a valuable approach in genetic epidemiology and increases the predictability of human quantitative traits based on genomic information compared with single SNP approach. Uric acid is the end product of purine metabolism in humans and higher primates and was initially believed to be a highly potent risk factor for disease development (1). This was confirmed in different studies that reported increased levels of serum uric acid in metabolic disorders and cancer (2-4). However, recent studies have reported possible beneficial effects of uric acid, especially in cardiovascular and neurological diseases of late onset (5,6). Possible protective effects are due to a strong antioxidant properties of uric acid (7). All these findings make uric acid a highly interesting research target in both epidemiology and genetics.Efforts in the search for the genetic basis of uric acid concentrations have been focused on several candidate genes (8,9) and the recently described SLC2A9 has been found to be a gene with a major effect in humans, especially in women (10,11). SLC2A9, also known as Glut 9, is a member of the SLC2A facilitative glucose transporter family, which has an important role in the sugars metabolism (12). The gene encodes a putative transporter of 540 amino acids, which is closely related to several more members of the same gene family, with 44% and 38% resemblance to Glut5 and Glut1, respectively (12). The protein consists of 12 transmembrane domains, sugar motifs, and other signatures which facilitate sugars transport (13). The long form of this protein in humans is most strongly expressed in basolateral membranes of proximal renal tubular cells, the liver, and placenta, w...

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Is uric acid protective or deleterious in acute ischemic stroke? A prospective cohort study

Cited by 83 publications

References 20 publications

Serum uric acid in US adolescents: distribution and relationship to demographic characteristics and cardiovascular risk factors

Serum uric acid in US adolescents: distribution and relationship to demographic characteristics and cardiovascular risk factors

Linking uric acid metabolism to diabetic complications

Predictive Value of 8 Genetic Loci for Serum Uric Acid Concentration

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