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Shen Y, Luo X, Guan Q, Lou W, Cheng L. Validation of a LC-MS/MS assay for citric acid, cysteine and oxalic acid determination and its application to explore pre-analytical sample storage. Pract Lab Med 2024; 42:e00433. [PMID: 39416856 PMCID: PMC11480260 DOI: 10.1016/j.plabm.2024.e00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2024] [Revised: 09/20/2024] [Accepted: 09/27/2024] [Indexed: 10/19/2024] Open
Abstract
Objectives Citrate, oxalate and cystine in 24-h urine are considered to be associated with the incidence and recurrence risk of urinary stone disease (USD). An evaluation of the LC-MS/MS kit for simultaneous quantification of the three analytes was undertaken. Design & Methods: The analytical performance of the kit was investigated based on FDA, EMA and CLSI guidelines. To promote the standardization of sample storage, this kit has been applied to perform systematic pre-analytical stability study of these analytes in urine. Results This method was validated with good linearity with accuracy of 93.1%-104 %. Intra-day and inter-day imprecision were ≤5.55 % and 5.34 %, respectively. Recoveries of citrate, oxalate and cystine added to clinical samples were in the range of 92.0-103 %, 94.8-100 % and 99.0-107 % with CV ≤ 5.52 %. It was recommended that urine preserved with hydrochloric acid could be preferable in consideration of both reliable test results and neglected sample heterogeneity. Conclusions This kit is suitable for measurement of citrate, oxalate and cystine for understanding the etiology of urinary stones, and the proper storage of urine samples is crucial for the correctness of the test results.
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Affiliation(s)
- Ying Shen
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Xia Luo
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Qing Guan
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Wenjie Lou
- Department of Orthopedics, General Hospital of the Yangtze River Shipping and Wuhan Brain Hospital, Wuhan 430010, PR China
| | - Liming Cheng
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
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Al KF, Joris BR, Daisley BA, Chmiel JA, Bjazevic J, Reid G, Gloor GB, Denstedt JD, Razvi H, Burton JP. Multi-site microbiota alteration is a hallmark of kidney stone formation. MICROBIOME 2023; 11:263. [PMID: 38007438 PMCID: PMC10675928 DOI: 10.1186/s40168-023-01703-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 10/17/2023] [Indexed: 11/27/2023]
Abstract
BACKGROUND Inquiry of microbiota involvement in kidney stone disease (KSD) has largely focussed on potential oxalate handling abilities by gut bacteria and the increased association with antibiotic exposure. By systematically comparing the gut, urinary, and oral microbiota of 83 stone formers (SF) and 30 healthy controls (HC), we provide a unified assessment of the bacterial contribution to KSD. RESULTS Amplicon and shotgun metagenomic sequencing approaches were consistent in identifying multi-site microbiota disturbances in SF relative to HC. Biomarker taxa, reduced taxonomic and functional diversity, functional replacement of core bioenergetic pathways with virulence-associated gene markers, and community network collapse defined SF, but differences between cohorts did not extend to oxalate metabolism. CONCLUSIONS We conclude that multi-site microbiota alteration is a hallmark of SF, and KSD treatment should consider microbial functional restoration and the avoidance of aberrant modulators such as poor diet and antibiotics where applicable to prevent stone recurrence. Video Abstract.
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Affiliation(s)
- Kait F Al
- Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, London, ON, Canada
- Department of Microbiology and Immunology, The University of Western Ontario, London, ON, Canada
| | - Benjamin R Joris
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Brendan A Daisley
- Molecular and Cellular Biology Department, University of Guelph, Guelph, ON, Canada
| | - John A Chmiel
- Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, London, ON, Canada
- Department of Microbiology and Immunology, The University of Western Ontario, London, ON, Canada
| | - Jennifer Bjazevic
- Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada
| | - Gregor Reid
- Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, London, ON, Canada
- Department of Microbiology and Immunology, The University of Western Ontario, London, ON, Canada
- Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada
| | - Gregory B Gloor
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - John D Denstedt
- Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada
| | - Hassan Razvi
- Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada
| | - Jeremy P Burton
- Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, London, ON, Canada.
- Department of Microbiology and Immunology, The University of Western Ontario, London, ON, Canada.
- Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada.
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Gong Y, Fang S, Zheng Y, Guo H, Yang F. Tetra-cyanostilbene macrocycle: An effective “turn-on” fluorescence sensor for oxalic acid in aqueous media. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li W, Zheng J, Chen M, Liu B, Liu Z, Gong L. Simultaneous determination of oxalate and citrate in urine and serum of calcium oxalate kidney stone rats by IP-RP LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1208:123395. [DOI: 10.1016/j.jchromb.2022.123395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 05/31/2022] [Accepted: 07/25/2022] [Indexed: 10/16/2022]
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Shen Y, Luo X, Li H, Guan Q, Cheng L. Evaluation of a high-performance liquid chromatography method for urinary oxalate determination and investigation regarding the pediatric reference interval of spot urinary oxalate to creatinine ratio for screening of primary hyperoxaluria. J Clin Lab Anal 2021; 35:e23870. [PMID: 34097312 PMCID: PMC8373360 DOI: 10.1002/jcla.23870] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 05/23/2021] [Accepted: 05/24/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Urinary oxalate can provide important clues for the screening and monitoring of children with primary hyperoxaluria (PH), which is a potentially life-threatening condition. However, little effort has been devoted to improve the oxalate assay in recent years. We have proposed a reliable and cost-effective high-performance liquid chromatography (HPLC) method for urinary oxalate determination. METHODS Urine specimens were centrifuged after one-step derivatization, and the supernatants were subjected to HPLC analysis. RESULTS The method was validated with consistent linearity from 0.0625 to 2.0 mmol/L with coefficients of variation ≤7.73%, good recovery, low carryover, satisfactory sample stability, and analytical specificity. The lower limit of quantification and the limit of detection were 0.03130 and 0.0156 mmol/L, respectively. Imprecision values were ≤2.92% and ≤16.6% for externally and internally produced controls, respectively. The pediatric reference interval of spot urinary oxalate to creatinine ratios was established together with its application in screening of PH in patients with renal diseases, revealing its successful deployment in our laboratory. CONCLUSIONS This reliable HPLC method could serve as a significant tool to determine urinary oxalate levels for screening and monitoring of children with PH in routine clinical laboratories.
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Affiliation(s)
- Ying Shen
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xia Luo
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huijun Li
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qing Guan
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liming Cheng
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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