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Showing 1 to 20 of 33 for “"Xanthine oxidase"”.
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The Enzymatic Oxidation of Aldehydes by Xanthine Oxidase
… tissues which catalyzed the oxidation of xanthine and hypoxanthine was recognized. The name given the enzyme was derived from its earliest recognized action, hence xanthine oxidase. Although little is known about the biological functions of the enzyme, the high affinity shown for xanthine …
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Investigating xanthine oxidase toxicity models in cultured cerebellar granule neurons
… evidence has been accumulating for a role for xanthine oxidoreductase (XOR)-generated toxic reactive oxygen species (ROS) in a variety of pathological conditions that affect different organ systems. This enzyme in mammals exists in two inter-convertible forms: xanthine dehydrogenase (XDH) (the …
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The Presence of Inhibitors and Activators of Xanthine Oxidase in Milk
Made available in DSpace on 2014-12-09T14:36:55Z (GMT). No. of bitstreams: 1 6612352.pdf: 5737638 bytes, checksum: c521d268a508c09922ae43947540dcc2 (MD5) Previous issue date: 1966
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Effects of xanthine oxidase inhibitors in pulmonary hypertension associated with chronic lung disease
… related pulmonary hypertension is allopurinol (a xanthine oxidase inhibitor) which decreases both uric acid and oxidative stress. We hypothesised that allopurinol could regress RVH in patients with pulmonary hypertension associated with chronic lung disease (PH-CLD).In a double-blind, randomised …
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Renal and Blood Pressure Effects of Xanthine Oxidase Inhibitors in the FAST trial
… pressure and control of hyperuricaemia with xanthine oxidase inhibitors. Data from the Febuxostat versus Allopurinol Streamlined (FAST) trial is presented in three studies:1) Up-Titration of Allopurinol in Patients with Gout. Patients recruited into the FAST trial have their sUA levels …
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Study of melissopalynological, physical and chemical properties, antioxidant and xanthine oxidase inhibition activity of heterotrigona itama honey in Johor, Malaysia
… and chemical properties, antioxidant and xanthine oxidase inhibition activity of Heterotrigona itama honey from six selected area in Johor, Malaysia. Plant sources of honey were identified by melissopalynological analysis, and multiply methods were conducted to investigate the physical and …
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Defined Dimensional Alterations in Enzyme Substrates. Synthesis and Enzymatic Evaluation of Some Lin-Naphthopurines
… extended dimensional derivatives of hypoxanthine and xanthine. These compounds, lin-naphthohypoxanthine and lin-naphthoxanthine, exhibited intense fluorescence. lin-Naphthoxanthine was not oxidized to lin-naphthouric acid by xanthine oxidase but functioned as a noncompetitive inhibitor. …
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Interaction of phthalazines with molybdenum hydroxylases. Phthalazine and its 1-substituted derivatives as substrates, inhibitors and inducers of aldehyde oxidase and xanthine oxidase, both in vitro and in vivo.
… with the molybdenum hydroxylases, aldehyde oxidase and xanthine oxidase, has been investigated both in vivo and /Ok in vitro. Metabolic studies, carried out by treating rabbits with both cold and 14C-labelled phthalazine, have shown that this compound is extensively metabolised in vivo, the …
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The role of molybdenum in the formate dehydrogenase of methanobacterium formicicum
… pterin similar to the molybdopterin of xanthine oxidase. In contrast to the molybdopterin from xanthine oxidase the formate dehydrogenase cofactor was unable to complement the cofactor-deficient nitrate reductase of Neurospora crassa mutant nit-1 and possessed two phosphate groups. …
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Defined Dimensional Changes in Purine Analogues
… for and alternative-substrate inhibitors of xanthine oxidase. In each case, the product of enzymatic oxidation has been isolated and compared with the same material synthesized chemically. These oxidation products have been identified as the corresponding benzoalloxanthines.
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OPTIMIZING DIAGNOSTIC ACCURACY IN CANINE URINARY TRACT INFECTIONS: FUTURE DIRECTIONS TO REDUCE ANTIMICROBIAL MISUSE IN VETERINARY PRACTICE
… (uNGAL), urinary interleukins 8 and 6, urinary xanthine oxidase, and urinary myeloperoxidase. Among these, urinary interleukin-8 and urinary xanthine oxidase are identified as the most promising disease markers, highlighting the need for further research, particularly including comparison with …
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Antioxidant activity of Mn-salophen complex and its effects on antioxidant enzymes in Escherichia coli
… The SOD-like activity of the complex in the xanthine-xanthine oxidase/cytochrome <i>c</i> assay was 1450 units/mg salophen. The SOD activity of the complex was suppressed 50% in the presence of EDTA (1 mM), but was not altered in the presence of bovine serum albumin (1 mg/ml) or crude protein …
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Anti-oxidant Action and Anti-aging Activity of Phenylpropanoid Compounds
… we measured DPPH radical scavenging assay, xanthine oxidase activity, NBT/xanthine oxidase superoxide scavenging assay. In cell system superoxide production using DHE, H₂O₂ production using DCF-DA and hydroperoxide production using DHR were checked. In order to find out the effects of …
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Effect of obesity on hepatic drug metabolism
… of childhood obesity on CYP1A2, CYP2D6, CYP3A4, xanthine oxidase, and NAT2 activity using caffeine and dextromethorphan as probe drugs. Our results conclusively indicate that obesity results in an elevation of xanthine oxidase and NAT2 enzyme activities in obese children as compared to lean …
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Prevention of stroke: risk stratification and targeted and novel therapies
… therapy and by beginning the evaluation of xanthine oxidase reduction and uric acid lowering therapy in the prevention of stroke. A clinical scoring system to aid diagnostic recognition in those with suspected transient ischaemic attack (TIA) was successfully developed and has the ability to …
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Allopurinol Regresses Left Ventricular Hypertrophy in Patients with Type 2 Diabetes.
… anti-oxidant, acting by blocking the enzyme Xanthine Oxidase, and has been previously shown to reduce vascular OS. Therefore the main aim of this thesis was to investigate whether allopurinol regresses LVH in patients with T2DM.<br/><br/>The trial design was a randomised, double blind, …
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Effects of Febuxostat on Autistic Behaviors and Computational Investigations of Diffusion and Pharmacokinetics
… of oxidative stress in brain tissue induced by xanthine oxidase (XO). Febuxostat is a new FDA approved XO-inhibitor that has been shown to be more selective and potent than allopurinol in patients with gout. The first study developed a computational model to calculate an effective diffusion …
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PRG4/CD44/PP2A Signaling Axis: A Significant Regulator of Gout Arthritis
… downstream production of interleukin-1b (IL-1b). Xanthine oxidase (XO) catalyzes purines into uric acid (UA) and reactive oxygen species (ROS) that activate NLRP3 inflammasome. Protein phosphatase-2A (PP2A) may be involved in regulating inflammatory pathways in macrophages. Proteoglycan 4 (PRG4) …
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The involvement of free radicals in the casual mechanism of Motor Neurone Disease
… superoxide dismutase (SOD2), glutathione peroxidase (GSHPx) and catalase (CAT) at the site of motor neurone loss (i.e. the anterior horn in the spinal cord) showed a significant increase in the percentage of SOD2, in MND patients than controls, at the thoracic level. GSHPX activity was …
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