A candidate reference method for uric acid in serum. II. Interlaboratory testing.

Duncan, P H; Gochman, Nathan; Bayse, D D; Burnett, Robert W.; Carey, N. H.; Carter, R; Fellows, W D; Garber, Carl C.; Kessler, Gerald; McComb, Robert B.; Miller, W. Greg; Nast, P; Ryan, William T.; Schaffer, Robert; Tejeda, Brenda; Vanderlinde, Raymond E.; Widdowson, Graham M.

doi:10.1093/clinchem/28.2.291

Cited by 10 publications

(3 citation statements)

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“…As such, this method was once recommended as a reference method for UA. However, the disadvantages of this manual ultraviolet uricase method were the interference from xanthine and poor precision at low UA concentrations [ 16 ]. All isotope dilution mass spectrometry (ID-MS) methods for measuring UA in serum have very high accuracy and precision.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Trueness and Inter-Laboratory Precision of Routine Uric Acid Assays Using 4 Frozen Pooled Serum Samples Measured by the Japan Society of Clinical Chemistry's HPLC Method

Jiang

2014

Ann Lab Med

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BackgroundReference procedures are required for evaluating the accuracy of routine analytical systems for uric acid (UA). External quality assessment (EQA) for UA has only been conducted with quality controls in China, and the results have not been published. This study was designed to investigate both the trueness and inter-laboratory precision of UA measurements among routine analytical systems using a candidate reference method.MethodsWe performed the HPLC method recommended by the Japan Society of Clinical Chemistry (JSCC). Next, we evaluated its analytical performance and validated its trueness. The performance of 4 routine analytical systems (5 instruments per system, n=20) for UA was assessed by using 4 frozen pooled serum samples measured by the HPLC method according to biologically relevant quality goals.ResultsWithin-run, between-run, inter-day, and total CV of the method were less than 0.3%, 0.4%, 1.8%, and 2.6%, respectively. The UA measurements were consistent with the target values of standard reference material (SRM) 909b, the sixth ring trial for Reference Laboratories (RELA-2008) specimen, and national primary reference materials. The 4 frozen pooled serum samples were homogeneous, stable, and commutable. All routine systems achieved the desirable performance goal (total error <11.9%).ConclusionsWe successfully reproduced the JSCC's HPLC method, which was simple, specific, precise, and accurate. We recommend this method as a reference method for UA measurement in human serum. Four routine analytical systems for UA measurement had acceptable traceability, and their UA results showed good concordance.

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Section: Introductionmentioning

confidence: 99%

Assessment of the Trueness and Inter-Laboratory Precision of Routine Uric Acid Assays Using 4 Frozen Pooled Serum Samples Measured by the Japan Society of Clinical Chemistry's HPLC Method

Jiang

2014

Ann Lab Med

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“…CRT was assayed by the Colorimetric kinetic method of Bartels et al [29]. UA was assessed using the enzymatic Colorimetric method of Duncan et al [30].…”

Section: Biochemical Estimation Of Antioxidant Enzymes and Renal Func...mentioning

confidence: 99%

Positive Stimulatory Potentials of Coconut (Cocos nucifera L.) Juice Extract on in vivo Antioxidants, Renal Function and Lipid Profile of Male Wistar Rats

Kpomah

Arhoghro

2023

EJMP

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Coconut juice is a natural drink from coconut fruit. This study was aimed at evaluating its positive potential on biochemical indices. Fresh coconut fruits were de-dshelled and washed. The cotyledon was broken to extract the water which was used in blending the fruits. The extract was filtered and the filtrate was collected in a vial. Twenty healthy male Wistar rats weighing 160 -180 g, were grouped into two groups of ten rats each and were treated as follows for four weeks. Group A: control rats received oral dose of 2 mL/kg body weight of distilled water once daily for 28 days, and group B: received oral dose of 2 mL/kg body weight of coconut juice extract once daily for 28 days, both groups were, however, allowed free access to feed and water ad-libitum. The animals were weighed before and on completion of the experimental protocol. Blood was also collected via cardiac puncture and used for renal function and lipid profile assay, kidneys were excised and weighed, homogenized and the supernatant was used for antioxidant enzyme evaluation. Findings showed that there was no significant change (p>0.05) in the kidney-to-body weight ratio and renal function indices. Significant reduction (p<0.05) was seen in cholesterol, triglycerides, LDL but with an increase (p<0.05) in HDL. Antioxidant enzymes were significantly increased (p<0.05). The study concludes that coconut juice extract has positive stimulatory potentials on antioxidants, renal functions and lipid parameters of wistar rats.

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“…Creatinine was assayed by colourimetric kinetic method of Bartels et al (1971). Uric acid was assessed using the enzymatic colourimetric method of Duncan et al (1982).…”

Section: Renal Functionmentioning

confidence: 99%

Investigation into the intake of a popular polyherbal drug (Jalin Herbal Mannex Liquid) on selected biochemical indices of male wister rats

Kpomah¹,

Arhoghro²

2022

Afr. J. Biochem. Res.

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Jalin Herbal Mannex Liquid (JHML) is a polyherbal formulation from honey, Panax ginseng, Liriosma ovate, and Lepidium mehenil, intended for enhanced sexual performance and improve sperm count in men. JHML was studied via its effect on body weight, biochemical indices and histopathology of the testes. Twenty healthy Wistar rats of 120 -150 g weight were allotted into groups A and B., of ten rats each, group A (control), were given 2 mL/kg B.W of tap water, group B were dosed with 2 mL/kg B.W of JHML for four weeks with the animals allowed access to feed and water ad-libitum. Blood were obtained through heart perforation, kidney and testes were excised, washed with normal buffered saline. Results from the investigation indicated that JHML had androgenic properties with marked significant increase (p˂0.05) in body weight of rats administered with JHML. Significant increase (p˂0.05) was observed in LH, FSH, testosterone and with a concomitant significant decrease (p˂0.05) in PRL. The JHML caused non-significant decrease (p>0.05) on triglycerides and cholesterol but with positive significant effect (p˂0.05) on LDL and HDL. No significant changes (p>0.05) on creatinine, urea, uric acid and serum electrolytes. Testicular sections of rats treated with JHML exhibited normal features, seminiferous epithelium and interstitial tissues with active spermatogenesis. The significant increase (p˂0.05) in testosterone, LH, FSH with a concomitant significant decrease (p˂0.05) in PRL may account for its sex invigorating potential, the non-significant changes observed in some biochemical indices of the rats showed that JHML is relatively safe at the studied dose.

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A candidate reference method for uric acid in serum. II. Interlaboratory testing.

Cited by 10 publications

References 0 publications

Assessment of the Trueness and Inter-Laboratory Precision of Routine Uric Acid Assays Using 4 Frozen Pooled Serum Samples Measured by the Japan Society of Clinical Chemistry's HPLC Method

Assessment of the Trueness and Inter-Laboratory Precision of Routine Uric Acid Assays Using 4 Frozen Pooled Serum Samples Measured by the Japan Society of Clinical Chemistry's HPLC Method

Positive Stimulatory Potentials of Coconut (Cocos nucifera L.) Juice Extract on in vivo Antioxidants, Renal Function and Lipid Profile of Male Wistar Rats

Investigation into the intake of a popular polyherbal drug (Jalin Herbal Mannex Liquid) on selected biochemical indices of male wister rats

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