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Hypertension and nephrology

JUNE 22, 2020

[About the care of patients with hyperuricaemia and gout]

[This consensus document is intended to provide guidance for the effective and efficient treatment of asymptomatic individuals with high uric acid levels and gout patients.]

Hypertension and nephrology

SEPTEMBER 12, 2018

[Hyperuricemia and cardiovascular risk: new treat to target principle in focus]

ALFÖLDI Sándor

[Hyperuricemia is frequent and its prevalence is increasing as it correlates with obesity and metabolic syndrome by several different mechanisms. Furthermore, recently several data are available for the cardiovascular and renal protective effect of allopurinol in the treatment of hyperuricemia and gout. The new European EULAR guidelines suggested treat to target principle in urat lowering therapy of gout. The uric acid target is below 360 µmol/l in mild to moderate gout. The guidelines unequivocally stated, that allopurinol is the first line uric acid lowering drug. Allopurinol treatment should be started immediately at the diagnosis and should be continued lifelong.]

Clinical Neuroscience

JULY 30, 2018

Can high uric acid levels be an independent risk factor for acute ischemic stroke due to large-artery atherosclerosis?

ACAR Türkan, ARAS Guzey Yesim, GÜL Sinem Sidika, ACAR Atılgan Bilgehan

Introduction - Uric acid is a molecule that is known to act as a natural antioxidant in acute oxidative stress conditions such as acute ischemic stroke (AIS). Although there are several studies on the prognostic value of serum uric acid (UA) level, especially the AIS, its importance in ischemic stroke is still controversial. Our aim in this study is to investigate whether the serum UA level is an indicative biomarker in the large-artery atherosclerosis in the AIS etiology. Material and method - Of the patients admitted to Sakarya University Training and Research Hospital Depart-ment of Neurology between January 2017 and November 2017, 91 hospitalized patients, who had AIS diagnosis and had their uric acid levels measured, were analyzed retrospectively. Patients with diabetes mellitus (DM), hypertension (HT), smoking habit, obesity, gout, hyperlipidemia (HL) and renal failure were excluded from the study. Patients were classified as anterior system and posterior system infarct. Then, patients were divided into two groups, one with internal carotid artery (ICA) > 50% stenosis and the other with ICA < 50% stenosis according to carotid-vertebral artery doppler USG examination performed for etiology. Serum UA, total bilirubin, direct bilirubin and indirect bilirubin levels of both groups were statistically compared. Results - In the comparison of serum UA values of ICA>50% stenosis and ICA<50% stenosis group of AIS patients, a statistically significant difference was found between the UA levels (p<0.000), but there was no difference between total bilirubin, direct bilirubin and indirect bilirubin values (p>0.05). Conclusion - High uric acid levels can be considered an independent, indicative risk factor for large-artery disease in AIS.

Hypertension and nephrology

DECEMBER 10, 2017

[Gout, hyperuricaemia and cardiovascular risk - Effects of allopurinol]

KÉKES Ede

[Hyperuricemia has an increasing clinical relevance due to its pathomechanism and its presence and adverse effects on cardiovascular, metabolic and renal diseases today. Its presence is a world phenomenon and in our country, we have seen increasing incidence rates during the screening surveys in recent years. Convincing evidence suggests that the high uric acid values in cardiovascular and renal diseases is an independent risk factor for CV mortality and their clinical manifestations. Experimental and clinical evidences indicates that in addition to gout, all high uric acid levels should be considered to initiate the XO inhibitor allopurinol treatment. Recently, in some diseases, in the treatment of the underlying disease (especially elderly hypertension, ischemic heart disease, chronic heart failure, chronic kidney failure) is also considered as an adjunct therapy.]

Hypertension and nephrology

SEPTEMBER 10, 2017

[Novelties in the treatment of hyperuricemia and gout: treat to target principle in focus]

ALFÖLDI Sándor

[The prevalence of hyperuricemia is is increasing as it is related by several different mechanisms to obesity and metabolic syndrome spreading epidemically worldwide. Several beneficial cardiovascular and renorotective effects of the xanthin-oxydase inhibitor allopurinol, administered in the treatment of hyperuricemia and gout, have been found out recently. The newest European EULAR guidelines for the treatment of gout recommended the treat-to target principle. A target value of ≤360 umol/l in patients with mild-to moderate gout and ≤300 umol/l in more serious cases has been suggested. The guidelines took an unequivocal commitment, that allopurinol is the first-line treatment. The hypouricemic therapy should be started as soon as possible after the diagnosis and should be continued lifelong in patients with gout.]

LAM KID

OCTOBER 04, 2013

[A simple method to detect urate crystals in formalin-fixed tissue]

BÉLY Miklós, KRUTSAY Miklós

[In our previous study we refuted the thesis that sodium urate crystals are not, or only rarely detectable in formalin-fixed histological samples because they dissolve in the aqueous formalin solution. Our observations indicate that dissolution of urate crystals is primarily caused by haematoxylineosin staining. Undeniably, however, urate crystals are partially dissolved in the aqueous solution of formaldehyde, and thus a small amount of urate deposits may totally dissolve from tissue samples. The aim of the present study was to identify those steps of the staining procedure that are responsible for the dissolution of urate crystals. We found that the dissolution of urate crystals during the course of staining was caused by the combined effects of haematoxylin staining, treatment with 1% aqueous lithium carbonate solution and dehydration with acetone. As the simplest histological method for the detection of urate crystals, we recommend examining unstained sections (mounted with Canada balsam) of formalin-fixed, paraffin-embedded tissue samples in polarised light. According to our previous study, about two thirds of urate crystals remain detectable on unstaied sections, whereas haematoxylin-eosin stained sections of the same tissue samples (derived from patients with gout) did not contain urate crystals. In the samples where urate crystals could be detected in haematoxylin- eosin stained sections using polarised light, the unstained sections contained much more crystals, which shows that dissolution is greatly decreased on unstained sections.]

Lege Artis Medicinae

JUNE 20, 2013

[A simple method to demonstrate urate crystals in formalin fixed tissue]

BÉLY Miklós, KRUTSAY Miklós

[In our previous study we refuted the thesis that sodium urate crystals are not, or only rarely detectable in formalin-fixed histological samples because they dissolve in the aqueous formalin solution. Our observations indicate that dissolution of urate crystals is primarily caused by haematoxylineosin staining. Undeniably, however, urate crystals are partially dissolved in the aqueous solution of formaldehyde, and thus a small amount of urate deposits may totally dissolve from tissue samples. The aim of the present study was to identify those steps of the staining procedure that are responsible for the dissolution of urate crystals. We found that the dissolution of urate crystals during the course of staining was caused by the combined effects of haematoxylin staining, treatment with 1% aqueous lithium carbonate solution and dehydration with acetone. As the simplest histological method for the detection of urate crystals, we recommend examining unstained sections (mounted with Canada balsam) of formalin-fixed, paraffin-embedded tissue samples in polarised light. According to our previous study, about two thirds of urate crystals remain detectable on unstaied sections, whereas haematoxylin-eosin stained sections of the same tissue samples (derived from patients with gout) did not contain urate crystals. In the samples where urate crystals could be detected in haematoxylin- eosin stained sections using polarised light, the unstained sections contained much more crystals, which shows that dissolution is greatly decreased on unstained sections.]