Hyperuricemia is a risk factor for various diseases, but knowledge on acute hyperuricemia is still not sufficient. The present study was aimed to investigate the effect of acute hyperuricemia on red blood cells from hemorheological point of view, and to provide the reference for clinical treatment. The rats were gavaged with 500 mg/kg hypoxanthine and intraperitoneally injected with 100 mg/kg oxonate to induce the model of acute hyperuricemia. The same volume of blood samples were drawn within time period of 0, 1, 2, 3 and 6 h, respectively, from the inner canthus of rats to measure the serum uric acid, hemorheological parameters and the malondialdehyde level. It was found that in each period of 1, 2 and 3 h, the rats had significantly higher levels of uric acid. The integrated deformation index and relax index were increased. The hemolysis rate was significantly reduced. The plasma malondialdehyde level was obviously decreased at the end of 2 h. The results suggested that short-term elevated uric acid could improve the hemorheological parameters and the lipid oxidative level in red blood cells.
Animals ; Erythrocytes ; Hemorheology ; Hyperuricemia ; blood ; Malondialdehyde ; blood ; Rats ; Rats, Sprague-Dawley ; Uric Acid ; blood

OBJECTIVETo analyze the relationship between hyperuricemia and primary nephrotic syndrome in childhood.

METHODA retrospective study was carried out in 107 children with primary nephrotic syndrome. The clinical data were analyzed with statistical methods to identify the related factors with hyperuricemia.

RESULTThe morbidity of hyperuricemia in children with primary nephrotic syndrome was 45% (48/107). Compared to those in normal serum uric acid group, the incidence of hypertension (33%, 16/48), serum triglyceride [2.59(1.62-3.87) mmol/L], creatinine [43.85(33.38-56.38)mmol/L], urea [6.11(3.77-8.40)mmol/L] and blood uric acid/creatinine ratio [9.30(7.03-12.72)] increased while creatinine clearance rate [141.74(103.57-160.97)ml/(min·1.73 (2))] decreased in hyperuricemia group.

CONCLUSIONHyperuricemia in children with primary nephrotic syndrome correlated with the increase of serum creatinine, urea and blood uric acid/creatinine ratio, the decrease of creatinine clearance rate and the occurance of hypertension.

Child ; Creatinine ; blood ; Humans ; Hypertension ; epidemiology ; Hyperuricemia ; epidemiology ; Nephrotic Syndrome ; epidemiology ; Retrospective Studies ; Uric Acid ; blood

We studied serum uric acid in 120 patients of essential hypertension visiting Department of Internal Medicine of Seoul Red Cross Hospital from October 1985 to November 1986 and analyzed its values in terms of various clinical and laboratory parameters. The results wereas follows; 1) The mean concentration of serum uric acid and incidence of hyperuricemia were 6.5+/-1.86mg%, 50.8% in hypertension group and those of normal control were 3.75+/-1.27mg%, 13.3%, respectively with significant high values in hypertension group. 2) The mean concentration of serum uric acid and the incidence of hyperuricemia were significantly correlated with the levels of diastolic blood pressure but there was only correlation between the incidence of hyperuricemia and the level of systolic pressure. 3) The mean concentration of serum uric acid and the incidence of hyperuricemia were significantly correlated with the level of BUN and serum creatinine, especially more in serum creatinine. 4) The mean concentration of serum uric acid and the incidence of hyperuricemia were not correlated with each level of serum cholesterol and triglyceride. 5) There was significant correlation between mean concentration of serum uric acid and abnormal urine finding but not in incidence of hyperuricemea.
Blood Pressure ; Cholesterol ; Creatinine ; Humans ; Hypertension* ; Hyperuricemia ; Incidence ; Internal Medicine ; Red Cross ; Seoul ; Triglycerides ; Uric Acid*

Thizide diuretics which are widely used nowadays, are considered to be drugs of first choice of antihypertensive agents, due to their slow and useful diuretic effects in hypertensive patients. But their adverse effects have been noted as hypokalemia and hyperuricemia. A newly developed non-thiazide diuretic agent, Sulfamoyl benzamide has been known as slow effective and safe diuretics as thiazides through several previous studies. And all the studies showed no serious hypokalemia or hyperuricemia. Authors administrated Sulfamoyl benzamide to 20 patients of essential hypertension for 4 weeks, who visited the Department of Internal Medicine of han Yang University Hospital from Nov.82' to May 83', and observed its hypotensive effect and its adverse effect as follows. 1) Before Sufamoyl benzamide administeration, mean arterial systolic pressure and mean arterial diastolic pressure of 20 patients of essential hypertension were 165.5+/-7.23 mmHg and 99.8+/-4.93 mmHg, respectively. The Mean Arterial Pressure(MAP) was 121.7+/-4.48 mmHg. After 4 weeks of treatment, the mean arterial systolic pressure, mean arterial diastolic pressure, and MAP were decreased to 148.3+/-10.64 mmHg(p<0.01), 94.3+/-6.40 mmHg(p<0.01), and 112.1+/-6.66 mmHg(p<0.01), respectively. 2) After 4 weeks of treatment, the hypotensive effect on each of 20 hypotensive patients was evaluated using our arbitrary scoring system which is decided by the degree of reduction of arterial systolic pressure and diastolic pressure. In all patients, useful hypotensive effect was noted. Out of 20 patients, 11 patients(55%) were 'Mild effective', 6 patients(30%) were 'Moderate effective', and 3 patients(15%) were 'Mild effective'. By MAP, the meaningful hypotensive effect was observed in 12 patients(60%), and there were a 'Mild effect' in 6 of 12 patients, a 'Moderate effect' in 4 of 12 patients, and a 'Marked effect' in 2 of 12 patients. 3) There was no adverse side effect except mild dizziness in only 1 patient, which was improved spontaneously after reduction of dosage of Sulfamoyl benzamide from 30 mg to 15mg whitout any specific treatment.
Antihypertensive Agents ; Blood Pressure ; Diuretics* ; Dizziness ; Humans ; Hypertension ; Hyperuricemia ; Hypokalemia ; Internal Medicine ; Thiazides

OBJECTIVETo study hypouricemic effect of aqueous extract of Lysimachia christinae on hyperuricemia in mice.

METHODThe uricase inhibitor potassium oxonate was used to induce hyperuricemia in mice, and serum uric acid level was determined with the phosphotungstic acid method.

RESULTThe aqueous extract of Lysimachia christinae, when administered orally to the oxonate-induced hyperuricemic mice at the doses of 5.2, 10.4 and 20.8 g.kg-1, was able to elicit dose-dependent hypouricemic effects. At these doses of the extract, the serum urate levels of the oxonate-pretreated mice showed no difference from the normal mice. In normal mice, however, oral administration of the extract at the same doses did not produce any observable hypouricemic effects.

CONCLUSIONThe aqueous extract of Lysimachia christinae possesses potent hypuricemic effects on models of hyperuricemia in mice pretreated with oxonate.

Animals ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; Female ; Hyperuricemia ; blood ; Mice ; Plants, Medicinal ; chemistry ; Primulaceae ; chemistry ; Uric Acid ; blood

Hyperuricemia mice model was established with uricase inhibitor (potassium oxonate) and uric acids in serum were observed. Polydatin (5, 10, 20 mg · kg(-1)) and benzbromarone (16.7 mg · kg(-1)) were given ig for 7 d in mice. Kidney tissues were used to detect gene contents ofurate anion transporter 1 (URAT1), organic anion transporter 1 (OAT1) and organic anion transporter 3 (OAT3) by real-time-PCR. The results showed that polydatin and benzbromarone can significantly reduce uric acid in blood of hyperuricemia mice (P < 0.05), compared with the model group. URAT1, OAT1 and OAT3 contents of the kidney in hyperuricemia mice changed significantly (P < 0.05), compared with the blank group. Polydatin can significantly inhibit the changing trends in these genes induced by potassium oxonate in a dose-dependent manner, the difference was significant (P < 0.05), compared with the model group. Those indicated that polysatin could reduce the level of the serum uric acid through promoting uric acid excretion.
Animals ; Disease Models, Animal ; Glucosides ; pharmacology ; Hyperuricemia ; drug therapy ; Kidney ; drug effects ; metabolism ; Mice ; Stilbenes ; pharmacology ; Uric Acid ; blood

OBJECTIVETo observe serum uric acid (UA) level distribution and explore risk factors of hyperuricemia (HUA) in a large cohort of active and retired employees underwent physical examination.

METHODSPhysical examination was arranged for 21 700 active and retired employees from May 2010 to September 2011, 16 416 employees were examined and complete examination data were obtained in 14 044 subjects. The distribution characteristics of UA level and correlations of UA level and HUA prevalence rate with gender, age, body mass index (BMI), systolic pressure (SBP), diastolic pressure (DBP), fasting blood-glucose (FPG), serum total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) were analyzed.

RESULTSHUA prevalence rate was 11.2% in this cohort, which was significantly higher in males (15.8%) than in females (4.1%, P < 0.05). The UA level and the HUA prevalence rate presented a "J" curve relationship with aging and positively correlated with BMI, SBP, DBP, TG, LDL-C, TC and FPG while negatively correlated with HDL-C. Multiple linear regression analysis showed that SBP, BMI, FPG, TG, and LDL-C were independent risk factors while HDL-C and female gender were the protective factors of HUA(all P < 0.01). Aging and high DBP were independent risk factors of HUA for females (all P < 0.05) and LDL-C was risk factor of HUA for males (P < 0.05).

CONCLUSIONSSerum UA level presents a "J" wave relationship with aging. The risk factors of HUA are increased SBP, BMI, FPG, TG, LDL-C while the protective factors of HUA are female gender and high HDL-C.

Adult ; Aged ; Female ; Humans ; Hyperuricemia ; epidemiology ; Male ; Middle Aged ; Physical Examination ; Prevalence ; Risk Factors ; Uric Acid ; blood

OBJECTIVETo explore the method for establishing animal models of gouty nephropathy complicated with chronic renal failure.

METHODSSix-eight weeks old male Wistar rats were fed with 10% fodder yeast. The adenine at the daily dose of 100, 150, 200, 250, and 300 mg/kg was administrated to them by gastrogavage. The serum levels of blood urea nitrogen (BUN), creatinine (Cr), and uric acid (UA) were dynamically monitored. Meanwhile, the pathological changes of rat kidney were observed.

RESULTSCompared with the normal control group, serum BUN, Cr, and UA obviously increased in rats administered with 100 mg/kg for 7 days (P<0.05). Meanwhile, pathological changes as gouty nephropathy occurred. Along with the prolongation of the modeling time, the aforesaid biochemical indices and pathohistological changes of the kidney were more obvious. The blood Cr level just reached the chronic renal failure level on the 26th day of the administration (about the 4th week), and obviously exceeded the renal failure level on the 41st day (about the 6th week). The blood UA level increased to a higher level on the 7th day of modeling, and maintained at a higher level for a long time. It decreased rapidly from the 41st day to the 48th day. The renal pathological examination showed aggravated infiltration of lymphocytes and stromal fibrous proliferation. On the 48th day of modeling, the proliferation of the fibrous tissue and the interstitial fibrosis were obvious on the bases of the aforesaid changes. The serum BUN, Cr, and blood UA obviously increased in the rats administered with 150, 200, 250, and 300 mg/kg when compared with the normal control group, reaching the level of chronic renal failure (P<0.05). These levels obviously decreased 17 days after restoring to normal fodder feeding, and approached the normal levels till the 35th day.

CONCLUSIONIdeal experimental animal models of gouty nephropathy complicated with chronic renal failure could be established in male Wistar rats by feeding with 10% fodder yeast and 100 mg/kg adenine by gastrogavage for 5 weeks.

Animals ; Disease Models, Animal ; Gout ; complications ; Hyperuricemia ; Kidney Failure, Chronic ; etiology ; Male ; Rats ; Rats, Wistar ; Uric Acid ; blood

Sodium-glucose cotransporter-2 (SGLT2) inhibitors are effective for overweight diabetic patients through the induction of glucosuria. However, SGLT2 inhibitors are not recommended for patients with advanced chronic kidney disease (CKD) because they may aggravate renal function and thus become less effective in controlling blood glucose in this patient population. We suggest that adequate hydration would be helpful to prevent the side effects of SGLT2 inhibitors in diabetic patients with advanced CKD. In this study, we review five cases of SGLT2 inhibitor therapy, specifically with dapagliflozin, for the treatment of diabetes mellitus in patients with advanced CKD. The patients experienced dramatic weight reduction, improved glucose control, and further benefits without aggravation of renal function.
Albuminuria ; Blood Glucose ; Diabetes Mellitus ; Diabetic Nephropathies* ; Glucose ; Humans ; Hyperuricemia ; Obesity ; Overweight ; Renal Insufficiency, Chronic ; Weight Loss

OBJECTIVETo develop the missing link between hyperuricemia and hypertension.

METHODSThe study was conducted in Department of Biochemistry in collaboration with Nephrology Unit of Internal Medicine Department. Hypertension was defined according to blood pressure readings by definitions of the Seventh Report of the Joint National Committee. Totally 205 newly diagnosed and untreated essential hypertensive cases and age-sex matched normotensive controls were enrolled in the study. The potential confounding factors of hyperuricemia and hypertension in both cases and controls were controlled. Uric acid levels in all participants were analyzed.

RESULTSRenal function between newly diagnosed hypertensive cases and normotensive healthy controls were adjusted. The mean serum uric acid observed in newly diagnosed hypertensive cases and in normotensive healthy controls were (290.05±87.05) μmol/L and (245.24±99.38) μmol/L respectively. A total of 59 (28.8%) participants of cases and 28 (13.7%) participants of controls had hyperuricemia (odds ratio 2.555 (95% CI: 1.549-4.213), P<0.001).

CONCLUSIONSThe mean serum uric acid levels and number of hyperuricemic subjects were found to be significantly higher in cases when compared to controls.

Adult ; Aged ; Cross-Sectional Studies ; Essential Hypertension ; Female ; Humans ; Hypertension ; blood ; epidemiology ; Hyperuricemia ; blood ; epidemiology ; Male ; Middle Aged ; Nepal ; epidemiology ; Uric Acid ; blood ; Young Adult