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  1. Azmi SMN, Jamal P, Amid A
    MyJurnal
    Malaysia has a rich diversity of medicinal plants and some of them inhibit xanthine oxidase (XO), which can be introduced as new natural sources of gout medication and a substitute for synthetic xanthine oxidase inhibitors (XOI). The degree of XO inhibitory activity was determined by measuring the absorbance spectrophotometrically at 295 nm, which is associated with uric acid formation. Our preliminary screening study had employed the use of distilled water, 70% methanol and absolute ethanol to extract XOI from twenty parts of five plant species, namely, Averrhoa carambola, Carica papaya, Dimocarpus longan malesianus, Manilkara zapota and Salacca zalacca. These plants were selected based on their frequent medicinal usages by local folks. The results have shown that an aqueous extract of Carica papaya mature leaves has promising activity to inhibit XO up to 75.68 ± 0.1%. Statistical experimental design were employed to optimize the selected sample (dried Carica papaya leaves: distilled water) on extraction of XOI and the maximum XOI percentage of 86.93 ± 1.9% was obtained, which exhibited only 6.76% less than the activity exhibited by allopurinol (93.69 ± 0.2%), a commercial XOI. The comparison was made between allopurinol and optimized extract on the basis of IC50concentrations. Allopurinol showed IC50 value of 3.74 μg/ml that is considerably lower as compared to the optimized sample (4.33 μg/ml).
    Matched MeSH terms: Uric Acid
  2. Thuraikumar K, Wan KL, Ong KL, Lim SW
    Malays Orthop J, 2020 Jul;14(2):141-144.
    PMID: 32983391 DOI: 10.5704/MOJ.2007.024
    Gouty arthritis commonly affects peripheral joints and is associated with hyperuricaemia. Spinal manifestations of gouty arthritis are not common, and majority of published articles worldwide were case reports. This is a case report of spinal gouty arthritis that presented with spinal vertebrae destruction and cauda equina syndrome. The magnetic resonance imaging (MRI) showed destruction of L5/S1end plates with cystic collection mimicking infective changes. The tissue histological examination confirmed presence of urate crystal needles that displayed negative double refraction on light microscopy. Spinal gouty arthritis is part of the differential diagnoses in gouty arthritis patients.
    Matched MeSH terms: Uric Acid
  3. Newaz MA, Adeeb NN, Muslim N, Razak TA, Htut NN
    Clin Exp Hypertens, 1996 Nov;18(8):1035-50.
    PMID: 8922344
    Uric acid produced by xanthine oxidase (also a source of superoxide radicals) has been known to increase in hypertensive patients. In this study we evaluated the possible involvement of uric acid and xanthine oxidase in the pathogenesis of hypertension by examining their association with mean arterial pressure (MAP) and factors related to blood pressure. These factors include age, quetelet index (weight/height2), cholesterol, creatinine, calcium (Ca), magnesium (Mg), sodium (Na), potassium (K) and urea. Fifty Two (male-19, female-33) normal healthy individuals were studied. Correlation studies of demographic variables showed that age was positively correlated with MAP [r = 0.309, p = 0.026] and cholesterol [r = 0.503, p = 0.000] while quetelet index was positively correlated with age [r = 422, p = 0.000] MAP [r = 0.331, p = 0.016] and xanthine oxidase [r = 0.331, p = 0.016]. MAP was positively correlated with uric acid [r = 0.511, p = 0.000], cholesterol [r = 0.492, p = 0.000] and xanthine oxidase enzyme activity [r = 0.388, p = 0.004] and negatively correlated with plasma calcium [r = 0.603, p = 0.000]. Correlation studies of measured parameters with uric acid and xanthine oxidase showed that uric acid was positively correlated with creatinine [r = 0.627, p = 0.000], plasma magnesium [r 0.442, p = 0.001] and negatively correlated with plasma calcium [r = 0.546, p = 0.000] while xanthine oxidase was negatively correlated with plasma calcium [r = -0.404, p = 0.003] and plasma sodium [r = -0.288, p = 0.038]. Stepwise multiple regression with MAP as dependent variable showed that 65% of total variability of blood pressure can be accounted for by plasma calcium, cholesterol, creatinine, plasma K, plasma Na, uric acid and xanthine oxidase in order of increasing R2 [xanthine oxidase: T-value = 3.26, R2 = 0.653]. It can be concluded that in normotensive subjects, uric acid and xanthine oxidase have significant association with blood pressure and thus are one of the many factors which are involved in the cause or effect of hypertension.
    Matched MeSH terms: Uric Acid/blood*
  4. Sari DCR, Soetoko AS, Soetoko AS, Romi MM, Tranggono U, Setyaningsih WAW, et al.
    Med J Malaysia, 2020 05;75(Suppl 1):14-18.
    PMID: 32471964
    INTRODUCTION: Uric acid is associated with cardiometabolic risk factor and severity of liver damage. The mechanism of uric acid inducing liver damage is still elusive. This study elucidates the development of liver fibrosis under hyperuricemia.

    METHODS AND MATERIALS: Hyperuricemia model was performed in male Swiss Webster mice. Intraperitoneally injection of uric acid (125mg/kg body weight) was done for 7 and 14 days (UA7 and UA14 groups). Meanwhile, the UAL groups were injected with uric acid and followed by the administration of allopurinol (UAL7 and UAL14 groups). On the due date, mice were sacrificed, and liver was harvested. Uric acid, SGOT, SGPT, and albumin level were measured from the serum. The mRNA expression of TLR4, MCP1, CD68, and collagen1 were assessed through RT-PCR. Liver fibrosis was quantified through Sirius red staining, while the number of hepatic stellates cells (HSCs) and TLR4 were assessed through IHC staining.

    RESULTS: Uric acid induction for 7 and 14 days stimulated an increase of both SGOT and SGPT serum levels. Followed by enhanced inflammatory mediators: Toll-like receptor-4 (TLR- 4), Monocyte Chemoattractant Protein-1 (MCP-1) and Cluster of Differentiation 68 (CD68) mRNA expression in the liver (p<0.05). The histological findings showed that the UA7 and UA14 groups had higher liver fibrosis scores (p<0.05), collagen I mRNA expression (p<0.05), and the number of HSCs (p<0.05) compared to Control group. Administration of allopurinol showed amelioration of uric acid and liver enzymes levels which followed by inflammatory mediators, liver fibrosis and collagen1, and hepatic stellate cells significantly.

    CONCLUSION: Therefore, uric acid augmented the liver fibrosis by increasing the number of hepatic stellate cells.

    Matched MeSH terms: Uric Acid/metabolism*
  5. Hussein NS, Sadiq SM, Kamaliah MD, Norakmal AW, Gohar MN
    Saudi J Kidney Dis Transpl, 2013 May;24(3):630-7.
    PMID: 23640651
    Urolithiasis is a common disease with increasing incidence and prevalence world-wide, probably more common in industrialized countries. The metabolic evaluation of 24-h urine collection has been considered as part of the management of urinary stone patients. The aim of this study was to evaluate the 24-h urine constituents in stone formers and its relation to demographic data in the northeast part of Peninsular Malaysia. One hundred and six patients were recruited in this study from two hospitals in the same geographical region; 96 patients fulfilled the inclusion criteria and an informed consent was obtained from all subjects. The 24-h urine was collected in sterile bottles with a preservative agent and calcium, oxalate, citrate, uric acid, magnesium and phosphate were tested using commercial kits on a Roche Hitachi 912 chemistry analyzer. The age (mean ± SD) of 96 patients was 56.45 ± 13.43 years and 82.3% of the patients were male while 17.7% were female. The 24-h urine abnormalities were hypercalciuria (14.5%), hyperoxaluria (61.4%), hypocitraturia (57.2%), hyperuricouria (19.7%), hypomagnesuria (59.3%) and hyperphosphaturia (12.5%). Hyperoxaluria (61.4%) was the most common abnormality detected during the analysis of 24-h urine constituents in contradiction to industrial countries, where hypercalciuria was the most common finding. The high frequencies of hypomagnesuria and hypocitraturia reflect the important role of magnesium and citrate in stone formation and their prophylactic role in the treatment of urinary stone disease in the given population.
    Matched MeSH terms: Uric Acid/urine
  6. Teh CL, Cheong YK, Wan SA, Ling GR
    Reumatismo, 2019 Oct 24;71(3):154-159.
    PMID: 31649384 DOI: 10.4081/reumatismo.2019.1225
    Treat-to-target (T2T) for gout has been established recently to improve its management, which has been reported to be sub-optimal with significant gaps between the goals of treatment and day-to-day clinical practice. T2T recommended a goal of serum urate (SUA) target of <360 μmoI/L in all patients with gout and <300 μmoI/L in patients with tophaceous or severe gout. T2T strategy was applied in the management of gout patients in two Rheumatology clinics from 1 January 2016 onwards. We performed a clinical audit to assess T2T of SUA in gout patients and to identify causes for failure to achieve target SUA among them. There were a total of 304 patients for our analysis. They were of multi-ethnic origin with male predominance (88.8%). They had a mean age of 57.7+13.7 years and mean disease duration of 10.1+8.7 years. The most common comorbidities were hypertension (76.2%), dyslipidemia (52.5%) and diabetes mellitus (DM) (27.4%). Our patients' body mass indexes showed that 47.7% were obese while 34.2% were overweight. Up to 62.4% of our patients had tophi and 42.6% had joint deformities. Only 34.9% of patients achieved target SUA. Nonadherence (52.3%) was the main reason identified for failure to achieve target SUA. The independent predictors for failure to achieve target SUA were nonadherence (HR=7.84, p=0.000) and presence of tophi (HR=1.95, p=0.001).
    Matched MeSH terms: Uric Acid
  7. Anwar F, Saleem U, Rehman AU, Ahmad B, Froeyen M, Mirza MU, et al.
    Front Pharmacol, 2021;12:607026.
    PMID: 34040515 DOI: 10.3389/fphar.2021.607026
    The presented study was designed to probe the toxicity potential of newly identified compound naphthalen-2-yl 3,5-dinitrobenzoate (SF1). Acute, subacute toxicity and teratogenicity studies were performed as per Organization of economic cooperation and development (OECD) 425, 407, and 414 test guidelines, respectively. An oral dose of 2000 mg/kg to rats for acute toxicity. Furthermore, 5, 10, 20, and 40 mg/kg doses were administered once daily for 28 days in subacute toxicity study. Teratogenicity study was performed with 40 mg/kg due to its excellent anti-Alzheimer results at this dose. SF1 induced a significant rise in Alkaline Phosphatases (ALP), bilirubin, white blood cells (WBC), and lymphocyte levels with a decrease in platelet count. Furthermore, the reduction in urea, uric acid, and aspartate transaminase (AST) levels and an increase in total protein levels were measured in subacute toxicity. SF1 increased spermatogenesis at 5 and 10 mg/kg doses. Teratogenicity study depicted no resorptions, early abortions, cleft palate, spina bifida and any skeletal abnormalities in the fetuses. Oxidative stress markers (Superoxide dismutase (SOD), Catalase (CAT), and glutathione (GSH) were increased in all the experiments, whereas the effect on melanoaldehyde Malondialdehyde (MDA) levels was variable. Histopathology further corroborated these results with no change in the architectures of selected organs. Consequently, a 2000 mg/kg dose of SF1 tends to induce minor liver dysfunction along with immunomodulation, and it is well below its LD
    50
    . Moreover, it can be safely used in pregnancy owing to its no detectable teratogenicity.
    Matched MeSH terms: Uric Acid
  8. Veerapen K, Schumacher HR, van Linthoudt D, Neilson EG, Wang F
    J Rheumatol, 1993 Apr;20(4):721-4.
    PMID: 8496872
    Systemic lupus erythematosus (SLE) and gout have been associated infrequently. We describe 3 young adults with SLE who developed tophaceous gout relatively early in the course of their disease. All were underexcretors of uric acid but were studied after the development of renal disease; 2 were treated with diuretics. In 2 cases, gout became obvious while lupus was quiescent.
    Matched MeSH terms: Uric Acid/metabolism*
  9. Abdullah H
    MyJurnal
    Introduction: Febuxostat is a non-purine-selective oral xanthine oxidase inhibitor drug, and is an alternative to Allopurinol to lower serum uric acid in gout patients. It is probably more effective than Allopurinol, however, its use is limited because of its cost and availability. Allopurinol has been the mainstay treatment for gout for about 50 years. However, its use has been associated with allergic reactions especially in patients with renal impairment.The objective of this study was to describe HTAA Rheumatology Unit experiences with Febuxostat in the management of gout.
    Materials and method: Case records belonging to 6 patients who had been started on Febuxostat between January 2012 and January 2017 were analysed.
    Results: The majority of patients on Febuxostat were males (83.3%) as well as Malays (83.3%). About 66.7% of patients had already developed mild to moderate chronic kidney disease (GFR between 30-89 mL/min) due to multifactorial causes by the time they were started on Febuxostat. Also 33% of patients had mild liver impairment (ALT & AST < 1.5 ULN) due to fatty liver prior to Febuxostat. All patients had been started on Febuxostat due to allergic reactions to Allopurinol. All patients were on Febuxostat 40 mg once a day. Following Febuxostat, a significant decrease in the uric acid levels much closer to the target level i.e. less than 360 µmol/L were achieved in all patients. Only 1 patient (16.7%) developed a side effect i.e. ALT > 1.5 ULN while the rest tolerated the drug very well.
    Conclusion: Although the number of patients analysed was small, Febuxostat was shown to be very effective and safe for use in patients with gout even with concomitant mild to moderate renal impairment. Serum uric acid levels reduced significantly while on the lowest dose of 40 mg once a day.
    Matched MeSH terms: Uric Acid
  10. Firouzi S, Haghighatdoost F
    Nutrition, 2018 02 06;51-52:104-113.
    PMID: 29626749 DOI: 10.1016/j.nut.2018.01.007
    OBJECTIVES: Recent studies have demonstrated promising results regarding possible improvements in renal function after prebiotic, probiotic, and synbiotic supplementation. The aim of this review was to demonstrate whether such supplementation will improve renal profile indexes including glomerular filtration rate (GFR), creatinine, blood urea nitrogen (BUN), uric acid (UA), and urea.

    METHOD: The meta-analysis included all studies that examined the effect of prebiotic, probiotic, and synbiotic supplements on one or more renal function parameters and had a control group. We searched July 1967 through to March 2016 MEDLINE, Scopus, and Google Scholar databases.

    RESULTS: Of 437 studies, 13 were eligible for inclusion in the meta-analysis. GFR levels tended to be reduced; whereas creatinine levels increased in the intervention group compared with the placebo group, both in a non-significant manner. The pooled effect on BUN demonstrated a significant decline compared with the placebo group (MD, -1.72 mmol/L; 95% confidence interval [CI], -2.93 to -0.51; P = 0.005). Urea significantly decreased after intervention (-0.46 mmol/L; 95% CI, -0.60 to -0.32; P <0.0001). The UA levels significantly increased in the intervention group compared with the placebo group (12.28 µmol/L; 95% CI, 0.85-23.71; P = 0.035).

    CONCLUSION: This study showed a significant increase in UA and a decrease in urea and BUN. The use of prebiotic, probiotic, and synbiotic supplements among those with compromised renal function or those at risk for renal failure should be limited until large-scale, well-designed randomized controlled trials prove the safety and efficacy of these supplements in improving renal function.

    Matched MeSH terms: Uric Acid
  11. Darmawan J, Rasker JJ, Nuralim H
    J Rheumatol, 2003 Nov;30(11):2437-43.
    PMID: 14677190
    OBJECTIVE: We describe a 10 year observation of the effect of control of hyperuricemia compared with self-medication alone in patients with chronic gout.
    METHODS: We studied 299 consecutively self-referred Malayo-Polynesian men with chronic gout, mean age 35 +/- 14.3 SD years. Subjects comprised 228 cases with chronic gout without tophi or urolithiasis (Group 1) and 71 with those complications (Group 2). Attacks of acute gouty arthritis were treated with nonsteroidal antiinflammatory drugs (NSAID) and/or corticosteroids. After acute arthritis had settled, urate-lowering drugs were instituted in both groups combined with low dose colchicine and/or low dose NSAID for at least 0.5-2 years. Urate levels were maintained longterm at a mean of < 5 mg/dl. After 10 years, the dropouts were traced and evaluated for comparison with baseline and those who remained in the study. In Group 2 the urate-lowering drugs were continued.
    RESULTS: Control of gout and hyperuricemia was achieved in all patients who remained under control: 91.6% of the 299 patients for at least 2 years (short-term), up to 5 years in 87.5% (medium term), and up to 10 years in 79.6% (longterm). In Group 1 (chronic gout without complication) only 36.8% had no attacks during 8 years, after they had tapered urate-lowering drug after the first 2 years of the study. In the 61 dropouts the intermittent symptomatic treatment and/or self-medication without longterm control of hyperuricemia resulted after 1 decade in chronic gout with more complications and associated conditions leading to increased morbidity, disability, and comorbidity, and 3 early mortalities.
    CONCLUSION: By controlling hyperuricemia, improvement of the prognosis of chronic gout, comorbidity, and early death was achieved compared with self-medication alone. Self-medication in a developing country if continued unchecked may become a public health problem in a population with a high prevalence rate of gout.
    Matched MeSH terms: Uric Acid/metabolism*
  12. Husain NN, Hairon SM, Zain RM, Bakar M, Bee TG, Ismail MS
    Oman Med J, 2020 Mar;35(2):e108.
    PMID: 32257417 DOI: 10.5001/omj.2020.26
    Objectives: Despite being recognized worldwide as an alternative therapy in treating various chronic diseases and pain, the mechanism of wet cupping is still not well understood. The purpose of this study was to evaluate fasting blood sugar (FBS), renal function parameters, and endothelial function changes following wet cupping in healthy individuals.

    Methods: We conducted a single-arm intervention study at the Clinical Lab of Community Medicine, Universiti Sains Malaysia, and included 31 healthy individuals aged between 30 and 60 years old. Wet cupping therapy was performed at five treatment points at the beginning of the study and repeated after three months. Health outcomes at baseline, one, three, and four months were assessed for FBS, renal function parameters (urea, creatinine, and uric acid), systolic blood pressure (SBP), and von Willebrand factor (vWF).

    Results: Forty-five percent of participants were female, and the mean age of study participants was 44.9±6.4 years. Wet cupping therapy significantly reduced FBS, serum urea, and serum creatinine at one, three, and four months compared with baseline values. Serum uric acid and SBP showed a significant reduction at one and four months compared with baseline. The vWF (a measure of endothelial function) had a 4.0% reduction at four months compared to baseline, with a mean difference of 5.3 (95% confidence interval (CI): 2.20 = 8.55; p = 0.002).

    Conclusions: This study provides preliminary support that repeated wet cupping therapy enhances body health status; thus, it could be an effective complementary medicine in disease prevention.

    Matched MeSH terms: Uric Acid
  13. Mustafa N, Isa MR, Baharuddin H
    Med J Malaysia, 2024 Jan;79(1):80-84.
    PMID: 38287762
    INTRODUCTION: The treat-to-target serum uric acid approach is recommended in local and international guidelines on gout management. Instruction for initiation and dose escalation for urate lowering therapy may cause confusion to the patient. Our aim was to develop and validate Gout Treat-To- Target booklet to aid in patient education.

    MATERIALS AND METHODS: A content development team which consisted of three consultant rheumatologists developed the booklet. Content validation was performed by a panel of evaluators consisted of eleven physicians (four consultant rheumatologists, two clinical specialists, and five medical officers), who were involved in gout management. Face validation was performed by ten patients with gout.

    RESULTS: Item-Content Validity Index ranged from 0.9 to 1 with regards to relevancy, clarity, ambiguity and simplicity. Side effects of uricosuric agents were added to the draft based on an evaluator's comment. Item-Face Validity Index was 1, which indicated that all patients were in 100% agreement with all items.

    CONCLUSION: We developed and validated our Gout Treat-to- Target booklet. There was high agreement in I-FVI and I-CVI among physicians and patients.

    Matched MeSH terms: Uric Acid*
  14. Mohamed Isa SSP, Ablat A, Mohamad J
    Molecules, 2018 Feb 13;23(2).
    PMID: 29438299 DOI: 10.3390/molecules23020400
    Plumeria rubra Linn of the family Apocynaceae is locally known in Malaysia as "Kemboja". It has been used by local traditional medicine practitioners for the treatment of arthritis-related disease. The LCMS/MS analysis of the methanol extract of flowers (PR-ME) showed that it contains 3-O-caffeyolquinic acid, 5-caffeoquinic acid, 1,3-dicaffeoquinic acid, chlorogenic acid, citric acid, 3,3-di-O-methylellagic acid, kaempferol-3-O-glucoside, kaempferol-3-rutinoside, kaempferol, quercetin 3-O-α-l-arabinopyranoside, quercetin, quinic acid and rutin. The flower PR-ME contained high amounts of phenol and flavonoid at 184.632 mg GAE/g and 203.2.2 mg QE/g, respectively. It also exhibited the highest DPPH, FRAP, metal chelating, hydrogen peroxide, nitric oxide superoxide radical scavenging activity. Similarly, the XO inhibitory activity in vitro assay possesses the highest inhibition effects at an IC50 = 23.91 μg/mL. There was no mortality or signs of toxicity in rats at a dose of 4 g/kg body weight. The administration of the flower PR-ME at doses of 400 mg/kg to the rats significantly reduced serum uric acid 43.77%. Similarly, the XO activity in the liver was significantly inhibited by flower PR-ME at doses of 400 mg/kg. These results confirm that the flower PR-ME of P. rubra contains active phytochemical compounds as detected in LCMS/MS that contribute to the inhibition of XO activity in vitro and in vivo in reducing acid uric level in serum and simultaneously scavenging the free radical to reduce the oxidative stress.
    Matched MeSH terms: Uric Acid/antagonists & inhibitors*; Uric Acid/blood
  15. Mahfudzah A, Nazihah MY, Wan Syamimee WG, Huay, Lin T, Wan Rohani WT
    MyJurnal
    Introduction: Solute carrier family 2, member 9 (SLC2A9) is thought to be an important urate transporter that influences the excretion and reabsorption of serum uric acid, thus has a strong effect on serum urate and risk of gout. SLC2A9 polymorphisms have been extensively studied in various populations in association with gout development. Our aim was to test for association of SLC2A9 SNPs with gout in Malay males.
    Methods: 78 gouty patients and 82 normal subjects were recruited and genotyped for rs3733591, rs5028843 and rs11942223 using PCR-RFLP technique. Single association and haplotype association analyses were conducted using SHEsis online software.
    Results: rs3733591 and rs5028843 showed association with gout with p value of 0.020 and 0.036, respectively, whilst rs11942223 yielded no association with p value of 0.08 with trend towards susceptibility projecting by OR=3.547, 3.667 and 2.732, respectively. It is noteworthy that haplotype 1/1/1 conferred protection in gout with p value 0.004 (OR=0.324 [0.147-0.716]).
    Conclusion: This study might suggest an evidence of association of SLC2A9 SNPs with gout among Malay males.
    KEYWORDS: Gout, SLC2A9, Malay males
    Study site: Medical Specialist Clinic at Hospital Universiti Sains Malaysia (HUSM), Kelantan, Malaysia
    Matched MeSH terms: Uric Acid
  16. Sulaiman N, Othman AZ, Shahril NS, Abdul Rashid AM, Md Noh MSF
    SAGE Open Med Case Rep, 2017;5:2050313X17749080.
    PMID: 29318019 DOI: 10.1177/2050313X17749080
    Over the years, allopurinol has been widely used as the preferred choice of urate lowering therapy in patients with gout. However, its role in patients with renal impairment is limited; and adverse reactions are well documented. Febuxostat, a newer oral non-purine xanthine oxidase inhibitor has been proven in several trials to be more effective and tolerable compared to allopurinol and may be used in patients with renal impairment. Here, we describe a case of successful febuxostat desensitization in a patient with a history of allopurinol- and febuxostat-induced adverse cutaneous reaction, as well as the protocol utilized.
    Matched MeSH terms: Uric Acid
  17. Arafat OM, Tham SY, Sadikun A, Zhari I, Haughton PJ, Asmawi MZ
    J Ethnopharmacol, 2008 Aug 13;118(3):354-60.
    PMID: 18602231 DOI: 10.1016/j.jep.2008.04.015
    AIM OF THE STUDY: Orthosiphon stamineus (Labiatae) is a traditional folk medicine widely used in Southeast Asia for the treatment of several kidney disorders, gout and as a diuretic. This study was conducted to examine the diuretic and hypouricemic effects of Orthosiphon stamineus leaf extracts.
    MATERIALS AND METHODS: The diuretic effect of different methanol extracts was examined by treating different groups of Sprague-Dawley rats with single (2g/kg) oral doses of methanol and methanol:water (1:1) extracts. Hydrochlorothiazide (10mg/kg) was used as positive control in acute study. Methanol and methanol water (1:1) extracts at 0.5 g/kg were administered for a period of 7 consecutive days. Cumulative urine volume and electrolytes (Na+ and K+) concentrations at different time intervals were measured. On the other hand, hypouricemic activity of methanol:water extract (1:1) was experimented using different oral single doses (0.25, 0.5, 1 and 2g/kg). Allopurinol was used as positive control. Uric acid concentration in serum was analyzed by using RP-HPLC at 280 nm.
    RESULTS: Sodium and potassium excretion increased significantly (p<0.05 and <0.01) in the first 8h of treatment with a single dose (2g/kg) of the extracts in a pattern comparable to that of the known diuretic hydrochlorothiazide. Meanwhile, repeated administration of 0.5 g/kg methanol:water (1:1) extract showed a significant increase in urine volume (from day 3 to day 7) (p<0.01) and electrolytes excretion (Na+ and K+) from day 2 to day 7 (p<0.05 and <0.01). On the other hand, 0.5, 1 and 2g/kg of methanol:water (1:1) extract and the standard allopurinol reduced the serum urate level in hyperuricemic rats at hour 6.
    CONCLUSION: These results provided an evidence of the high tendency of methanol:water (1:1) extract of Orthosiphon stamineus towards diuretic and hypouricemic effects in rats.
    Matched MeSH terms: Uric Acid/blood*
  18. Jothi L, Neogi S, Jaganathan SK, Nageswaran G
    Biosens Bioelectron, 2018 May 15;105:236-242.
    PMID: 29412948 DOI: 10.1016/j.bios.2018.01.040
    A novel nitrogen/argon (N2/Ar) radio frequency (RF) plasma functionalized graphene nanosheet/graphene nanoribbon (GS/GNR) hybrid material (N2/Ar/GS/GNR) was developed for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). Various nitrogen mites introduced into GS/GNR hybrid structure was evidenced by a detailed microscopic, spectroscopic and surface area analysis. Owing to the unique structure and properties originating from the enhanced surface area, nitrogen functional groups and defects introduced on both the basal and edges, N2/Ar/GS/GNR/GCE showed high electrocatalytic activity for the electrochemical oxidations of AA, DA, and UA with the respective lowest detection limits of 5.3, 2.5 and 5.7 nM and peak-to-peak separation potential (ΔEP) (vs Ag/AgCl) in DPV of 220, 152 and 372 mV for AA/DA, DA/UA and AA/UA respectively. Moreover, the selectivity, stability, repeatability and excellent performance in real time application of the fabricated N2/Ar/GS/GNR/GCE electrode suggests that it can be considered as a potential electrode material for simultaneous detection of AA, DA, and UA.
    Matched MeSH terms: Uric Acid/blood*
  19. Chin KY, Nirwana SI, Ngah WZ
    Clin Interv Aging, 2015;10:1377-80.
    PMID: 26346636 DOI: 10.2147/CIA.S90233
    Previous reports of patients undergoing parathyroidectomy and of patients receiving teriparatide as antiosteoporotic treatment have suggested a plausible relationship between parathyroid hormone (PTH) and uric acid. However, similar data at population level were lacking. The current study aimed to determine the relationship between PTH and uric acid in a group of apparently healthy Malaysian men.
    Matched MeSH terms: Uric Acid/blood*
  20. Subramani S, Khor SE, Livingstone BI, Kulkarni UV
    Med J Malaysia, 2010 Mar;65(1):36-40.
    PMID: 21265246 MyJurnal
    To investigate the possible association between serum uric acid levels, serum C-Reactive Protein (CRP), and age-related macular degeneration (ARMD). A total 232 patients of the eye department at Hospital Tuanku Ja'afar, Negeri Sembilan, Malaysia were recruited over 9 weeks. Participants were divided into ARMD (Non-Neovascular ARMD, and Neovascular ARMD) and control groups. 107 participants with non-neovascular ARMD, 6 with neovascular ARMD, and 119 controls participated in the study. The control patients had a similar average Serum Uric Acid level to the average of all patients with ARMD (P = 0.617).
    Matched MeSH terms: Uric Acid/blood*
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