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Apiratmateekul N, Nammoonnoy J, Kost GJ, Treebuphachatsakul W. Commutable Blood Materials from the Fixed-Cell Method for Performance Evaluation of Blood Glucose by a Glucose Meter. Diagnostics (Basel) 2024; 14:799. [PMID: 38667445 PMCID: PMC11049301 DOI: 10.3390/diagnostics14080799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/03/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
Glucose meters provide a rapid blood glucose status for evidence-based diagnosis, monitoring, and treatment of diabetes mellitus. We aimed to evaluate the commutability of processed blood materials (PBMs) and their use in the performance evaluation of glucose meters. Two PBMs obtained by the fixed-cell method were analyzed for homogeneity, stability, and commutability. The compatibility of ten pairs between mass spectrometry and each glucose meter was categorized as compatible (mean paired difference ≤ 5%) and incompatible (mean paired difference > 5%). The performance of glucose meter 1 (n = 767) and glucose meter 2 (n = 266) was assessed. The glucose in the PBMs remained homogenized and stable for at least 180 days. Six out of ten pairs had commutable PBMs. Commutability of PBMs was observed in both well-compatible and incompatible glucose results. Target glucose values from mass spectrometry were significantly different (p ≤ 0.05) from consensus values in one group of glucose meters. When commutable PBMs were used, glucose meter 1 showed better performance than glucose meter 2, and the percentage of satisfaction was associated when using target values for glucose from mass spectrometry and consensus values, but the performance of glucose meter 2 was not associated. PBM from a fixed-cell method could be mass produced with acceptable homogeneity and stability. Commutability testing of PBMs is required prior to use in the performance evaluation of glucose meters, as the commutability of glucose in the PBMs obtained by a fixed-cell method was variable and depended on the individual glucose meter.
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Affiliation(s)
- Napaporn Apiratmateekul
- Department of Medical Technology, Faculty of Allied Health Sciences, Phitsanulok 65000, Thailand;
- Reference Material and Laboratory Innovation Research Unit, Naresuan University, Phitsanulok 65000, Thailand
| | - Jintana Nammoonnoy
- National Institute of Metrology (Thailand), Prathum Thani 12120, Thailand;
| | - Gerald J. Kost
- Pathology and Laboratory Medicine, POCT.CTR, School of Medicine, University of California, Davis, CA 95616, USA;
| | - Wanvisa Treebuphachatsakul
- Department of Medical Technology, Faculty of Allied Health Sciences, Phitsanulok 65000, Thailand;
- Reference Material and Laboratory Innovation Research Unit, Naresuan University, Phitsanulok 65000, Thailand
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2
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Fiedorova K, Augustynek M, Kubicek J, Kudrna P, Bibbo D. Review of present method of glucose from human blood and body fluids assessment. Biosens Bioelectron 2022; 211:114348. [DOI: 10.1016/j.bios.2022.114348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 03/22/2022] [Accepted: 05/05/2022] [Indexed: 12/15/2022]
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3
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Abstract
In this issue of Journal of Diabetes Science and Technology, Baumstark et al. evaluated the analytical performance of a bench-top laboratory glucose analyzer (SUPER-GL) intended for replacement for the YSI2300-STAT analyzer, that served for several decades as a comparator method in clinical and analytical studies of blood glucose monitoring systems (BGMS). The authors concluded that the SUPER-GL's overall performance is comparable to that of YSI2300-STAT, and has the potential to be a candidate comparator analyzer. However, the question is if we need to recommend as a "comparator method," a specific device, that measure glucose using the same analytical method with most BGMS. In this analysis we present our point of view hoping to generate a discussion on the necessity for such a replacement.
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Affiliation(s)
- Loukia Spanou
- Department of Endocrinology and
Diabetes, Hellenic Red Cross Hospital, Athens, Greece
| | - Konstantinos Makris
- Clinical Biochemistry Department,
KAT General Hospital, Kifissia, Athens Greece
- Konstantinos Makris, PhD, EurSpLM,
FAACC, Clinical Biochemist, Clinical Biochemistry Department, KAT
General Hospital, 2 Nikis street, Kifissia, Athens 14561, Greece.
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4
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Seo MS, Jeong JS, Abady MM, Kwon HJ. Candidate reference measurement procedure based on HPAEC-PAD for the development of certified reference materials for monosaccharides in serum. Anal Bioanal Chem 2021; 413:5517-5527. [PMID: 34286356 DOI: 10.1007/s00216-021-03537-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/29/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
To achieve the measurement reliability of monosaccharides used as diagnostic markers in clinical fields, it is essential to establish certified reference materials (CRMs). The purpose of this study is to develop a serum CRM by adopting high-performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD) as a new candidate reference measurement procedure for the measurement of glucose and galactose, common diagnostic markers of diabetes and galactosemia, respectively. Using various monosaccharides as internal standards, the accuracy of the HPAEC-PAD method was tested by measuring glucose CRM following treatment with three different deproteinization methods: ultrafiltration, protein precipitation by trichloroacetic acid (TCA), and protein precipitation by acetonitrile. Results showed that ultrafiltration and 5% TCA provided good accuracy with every tested monosaccharide as the internal standard. Accordingly, serum samples in this study were treated by ultrafiltration after adding 2-deoxy-D-glucose and arabinose, which were selected as internal standards for galactose and glucose, respectively. Both intra- and inter-day recovery tests showed good precision and accuracy within 2%. From the serum CRM batches prepared at two levels, 11 units were analyzed by exact-matched calibration methods, and the mass fractions of galactose and glucose were determined via HPAEC-PAD. The between-unit relative standard deviations were not more than 1.5%, showing homogeneity. The expanded uncertainties (%) of galactose and glucose for both levels were less than 3.6% and 2.3% at 95% confidence. The HPAEC-PAD method presented in this study can significantly improve the accuracy and precision of simultaneous monosaccharide analysis, allowing for the development of further serum CRMs for monosaccharides. Graphical abstract.
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Affiliation(s)
- Min-Seon Seo
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Ji-Seon Jeong
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
| | - Mariam M Abady
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea.,Department of Nutrition and Food Science, National Research Center, Dokki, Cairo, 12622, Egypt
| | - Ha-Jeong Kwon
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.
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5
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Zhao S, Guo D, Zhu Q, Dou W, Guan W. Display of Microbial Glucose Dehydrogenase and Cholesterol Oxidase on the Yeast Cell Surface for the Detection of Blood Biochemical Parameters. BIOSENSORS 2020; 11:13. [PMID: 33396921 PMCID: PMC7823397 DOI: 10.3390/bios11010013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/20/2020] [Accepted: 12/28/2020] [Indexed: 01/16/2023]
Abstract
High levels of blood glucose are always associated with numerous complications including cholesterol abnormalities. Therefore, it is important to simultaneously monitor blood glucose and cholesterol levels in patients with diabetes during the management of chronic diseases. In this study, a glucose dehydrogenase from Aspergillus oryzae TI and a cholesterol oxidase from Chromobacterium sp. DS-1 were displayed on the surface of Saccharomyces cerevisiae, respectively, using the yeast surface display system at a high copy number. In addition, two whole-cell biosensors were constructed through the immobilization of the above yeast cells on electrodes, for electrochemical detection of glucose and cholesterol. The assay time was 8.5 s for the glucose biosensors and 30 s for the cholesterol biosensors. Under optimal conditions, the cholesterol biosensor exhibited a linear range from 2 to 6 mmol·L-1. The glucose biosensor responded efficiently to the presence of glucose at a concentration range of 20-600 mg·dL-1 (1.4-33.3 mmol·L-1) and showed excellent anti-xylose interference properties. Both biosensors exhibited good performance at room temperature and remained stable over a three-week storage period.
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Affiliation(s)
- Shiyao Zhao
- Institute of Pharmaceutical Biotechnology and the Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310012, China; (S.Z.); (Q.Z.); (W.D.)
| | - Dong Guo
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310012, China;
| | - Quanchao Zhu
- Institute of Pharmaceutical Biotechnology and the Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310012, China; (S.Z.); (Q.Z.); (W.D.)
| | - Weiwang Dou
- Institute of Pharmaceutical Biotechnology and the Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310012, China; (S.Z.); (Q.Z.); (W.D.)
| | - Wenjun Guan
- Institute of Pharmaceutical Biotechnology and the Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310012, China; (S.Z.); (Q.Z.); (W.D.)
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6
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Chen Y, Liu H, Loh TP, Liu Q, Teo TL, Lee TK, Sethi SK. Measurement of urine albumin by liquid chromatography-isotope dilution tandem mass spectrometry and its application to value assignment of external quality assessment samples and certification of reference materials. Clin Chem Lab Med 2020; 59:711-720. [DOI: 10.1515/cclm-2020-0969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/27/2020] [Indexed: 12/20/2022]
Abstract
Abstract
Objectives
Urine albumin is measured in clinical laboratories by immunoturbidimetry. However, large biases are observed among the different routine methods. To standardize the measurement of urine albumin, a reference measurement procedure (RMP) and urine albumin certified reference materials (CRMs) are needed.
Methods
A candidate RMP for urine albumin based on liquid chromatography-isotope dilution tandem mass spectrometry (LC-IDMS/MS) using human serum albumin as calibration standard was developed. Isotope-labeled human albumin was used as internal standard. Urine samples were digested using trypsin and eight resulting “signature” peptides of albumin were quantified by LC-IDMS/MS. The candidate RMP was employed in value assignment of external quality assessment (EQA) samples and certification of urine albumin reference materials. The commutability of the developed CRMs was assessed against patient samples.
Results
The candidate RMP (recovery 101.5–103.2% and CV 1.2–3.3% at about 7–40 mg/L) met optimal performance goal. The lower limit of quantification was 0.03 mg/L as determined by signal-to-noise method. The EQA results from clinical laboratories using different immunoturbidimetric methods were generally comparable with assigned target values determined by the candidate RMP, with albumin concentrations ranging from 5 to 226 mg/L. Urine albumin reference materials (two levels) certified using the candidate RMP showed good commutability in a preliminary study.
Conclusions
With optimal method precision and trueness, as well as comparability with routine methods, the developed RMP may be used for value assignment of EQA samples or certification of reference materials, which are important pillars in urine albumin method standardization.
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Affiliation(s)
- Yizhao Chen
- Chemical Metrology Division, Applied Sciences Group , Health Sciences Authority , Singapore , Singapore
| | - Hong Liu
- Chemical Metrology Division, Applied Sciences Group , Health Sciences Authority , Singapore , Singapore
| | - Tze Ping Loh
- Department of Laboratory Medicine , National University Hospital , Singapore , Singapore
| | - Qinde Liu
- Chemical Metrology Division, Applied Sciences Group , Health Sciences Authority , Singapore , Singapore
| | - Tang Lin Teo
- Chemical Metrology Division, Applied Sciences Group , Health Sciences Authority , Singapore , Singapore
| | - Tong Kooi Lee
- Chemical Metrology Division, Applied Sciences Group , Health Sciences Authority , Singapore , Singapore
| | - Sunil Kumar Sethi
- Department of Laboratory Medicine , National University Hospital , Singapore , Singapore
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7
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Liu H, Cheow PS, Yong S, Chen Y, Liu Q, Teo TL, Lee TK. Determination of purity values of amino acid reference materials by mass balance method: an approach to the quantification of related structure impurities. Anal Bioanal Chem 2020; 412:8023-8037. [PMID: 32914399 DOI: 10.1007/s00216-020-02936-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/26/2020] [Accepted: 09/02/2020] [Indexed: 11/30/2022]
Abstract
A systematic procedure for the determination of purity values of amino acid reference materials was developed by use of mass balance method where four categories of impurities (related structure impurities (RSIs), water, organic solvent residue (OSR), and non-volatile residue (NVR)) were quantified separately. The amount of RSIs was determined using a combination of three quantification methods. To ensure metrological traceability in the determination of RSIs, at least one such impurity in each candidate amino acid reference material was quantified using liquid chromatography-isotope dilution tandem mass spectrometry (LC-IDMS/MS). Other RSIs were determined using external calibration liquid chromatography-tandem mass spectrometry (LC-MS/MS) or o-phthaldialdehyde (OPA) derivatization, followed by liquid chromatography-ultraviolet (LC-UV) measurement. As the UV absorption of most RSIs came basically from the same chromophore after OPA derivatization, a relative peak area approach was used in the LC-UV method to quantify the amount of RSIs by comparing their peak areas with that of a reference RSI. The reference RSI was pre-selected and the amount determined by LC-IDMS/MS separately. The absence of D-amino acids was confirmed using Marfey's reagent derivatization, followed by LC-UV analysis. The amounts of water, OSR, and NVR were measured using Karl Fischer coulometry, gas chromatography-mass spectrometry (GC-MS) and thermogravimetry, respectively. By using this procedure, four amino acid (L-valine, L-leucine, L-isoleucine, and L-phenylalanine) certified reference materials (CRMs) were developed from the candidate materials. The homogeneity and stability of the CRMs were demonstrated by use of LC-IDMS/MS or OPA-LC-UV method, following the principles in ISO 17034 and ISO Guide 35.Graphical abstract.
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Affiliation(s)
- Hong Liu
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
| | - Pui Sze Cheow
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
| | - Sharon Yong
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
| | - Yizhao Chen
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
| | - Qinde Liu
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore.
| | - Tang Lin Teo
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
| | - Tong Kooi Lee
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore, 117528, Singapore
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8
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Vilbaste M, Tammekivi E, Leito I. Uncertainty contribution of derivatization in gas chromatography/mass spectrometric analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8704. [PMID: 31845399 DOI: 10.1002/rcm.8704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/29/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE The purpose of the current work is to realistically assess the uncertainty contribution in gas chromatography/mass spectrometry (GC/MS) analysis originating from less-than-ideal derivatization efficiency. METHODS As the exemplary analytical method a two-step derivatization method with KOH and BSTFA (N,O-bis(trimethylsilyl)trifluoroacetamide), applied for the analysis of fatty acid triglycerides (using real measurement data), was selected. The derivatization efficiencies were in the range 0.89-1.04. In this study, two approaches for bottom-up uncertainty evaluation were compared: the traditional GUM approach and the Monte Carlo method (MCM). Both were used with and without taking correlation between input quantities into account. RESULTS The most reliable uncertainty estimates were in the range 0.07-0.08 (expanded uncertainties at 95% coverage probability). A strong negative correlation was found between the slope and intercept of the calibration graph (r = -0.71) and it markedly influenced the uncertainty estimate of derivatization efficiency. The MCM was found to give somewhat higher uncertainty estimates, which are considered more realistic. CONCLUSIONS Derivatization directly affects the analysis result. Thus, in the case of this exemplary analysis, just derivatization alone (i.e. if all other uncertainty sources are neglected) causes relative expanded uncertainty around 8%, being thus an important and in some cases the dominant uncertainty contributor.
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Affiliation(s)
- Martin Vilbaste
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
| | - Eliise Tammekivi
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
| | - Ivo Leito
- University of Tartu, Institute of Chemistry, Ravila 14a, 50411, Tartu, Estonia
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9
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Wang X, Zhang F, Li H, Xiao P, Su F, Xu B, Sun W, Song D. Purity determination of synthetic glucagon using a mass balance approach. Sci Rep 2020; 10:4423. [PMID: 32157163 PMCID: PMC7064584 DOI: 10.1038/s41598-020-61109-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 02/07/2020] [Indexed: 12/01/2022] Open
Abstract
Due to the widespread use of synthetic peptide drugs, their quantification and the analysis of impurities have become increasingly important in clinical and medical settings. Moreover, quantifying proteins using synthetic peptides as internal or external standards is a general approach, and the key to this approach is the knowing purities of the peptides. In this paper, synthetic glucagon was quantified using a mass balance method. The impurities in glucagon were analyzed and then accurately quantified separately. Karl Fischer (KF) titration and ion chromatography (IC) were used to determine the water and trifluoroacetic acid (TFA) contents in the samples, respectively. Furthermore, the inorganic ion content in the samples was determined by inductively coupled plasma mass spectrometry (ICP-MS). The sequence of peptide impurities was identified by a Thermo Fisher Orbitrap mass. Samples were determined to be 896.36 ± 0.68 mg/g after subtracting all impurity masses from the sample mass. The result can be traced to SI units.
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Affiliation(s)
- Xinxue Wang
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China.,Beijing University of Chemical Technology, Beijing, China
| | - Fangyan Zhang
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China.,Beijing University of Chemical Technology, Beijing, China
| | - Hongmei Li
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China.
| | - Peng Xiao
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China
| | - Fuhai Su
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China
| | - Bei Xu
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China
| | - Wei Sun
- Beijing University of Chemical Technology, Beijing, China
| | - Dewei Song
- National Institute of Metrology, China/Division of Chemical Metrology and Analytical Science, Beijing, China.
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10
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Chen Y, Teo HL, Liu H, Loh TP, Liu Q, Teo TL, Lee TK, Sethi SK. Simple and accurate candidate reference measurement procedure for total testosterone in human serum by one-step liquid-liquid extraction coupled with isotope dilution mass spectrometry. Anal Bioanal Chem 2019; 411:7519-7528. [DOI: 10.1007/s00216-019-02152-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/27/2019] [Accepted: 09/12/2019] [Indexed: 12/01/2022]
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11
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Liu H, Wong L, Yong S, Liu Q, Teo TL, Lee TK, Loh TP, Sethi SK, Wong MS, Cosio SMDS, Ho CK, Setoh JWS, Lim SFM, Lee GLL, Khalid H, Lim S, Lam CW, Lee MY, Yeo CP, Chincholkar PR, Hawkins R, Ng BY. Commutable whole blood reference materials for hemoglobin A1c validated on multiple clinical analyzers. ACTA ACUST UNITED AC 2019; 57:648-658. [DOI: 10.1515/cclm-2018-0861] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/05/2018] [Indexed: 11/15/2022]
Abstract
Abstract
Background
The measurement of hemoglobin A1c (HbA1c) is important for diagnosing diabetes mellitus as well as assessing glycemic control in diabetic patients. Commutable whole blood certified reference materials (CRMs) are needed in the measurement of HbA1c for method validation and/or as quality controls.
Methods
We developed three levels of hemolyzed whole blood CRMs for HbA1c. The certified values were determined using liquid chromatography-isotope dilution tandem mass spectrometry method (LC-IDMS/MS) where two “signature” hexapeptides of HbA1c and hemoglobin A0 (HbA0) were used as the calibration standards. The concentrations of the hexapeptide solutions were determined by amino acid analysis by the LC-IDMS/MS method using amino acid CRMs as the calibration standards. The commutability study was conducted by measuring 25 patient specimens and the whole blood CRMs by both LC-IDMS/MS method and various routine methods using six different clinical analyzers.
Results
The certified values were determined to be 35.1±2.0, 50.3±1.9 and 65.8±2.6 mmol/mol, respectively. These CRMs showed good commutability on five of the six clinical analyzers but showed poor commutability on one of the clinical analyzers that used similar method as two other analyzers where good commutability was observed.
Conclusions
With certified target values based on metrological traceability and good commutability on most of the clinical analyzers, the developed whole blood CRMs can be used for method validation or as quality control materials in the measurement of HbA1c. The commutability study results also underscored the need of commutability testing of clinical CRMs using various clinical analyzers.
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Zhu H, Xu J, Qiu W, DuBois JA, Xu J. NIST calibration alignment is essential when selecting a laboratory reference method for evaluating POC Blood Glucose Monitoring Systems. Clin Chim Acta 2019; 488:172-173. [DOI: 10.1016/j.cca.2018.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/02/2018] [Accepted: 11/06/2018] [Indexed: 11/29/2022]
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13
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Khamis MM, Adamko DJ, Purves RW, El-Aneed A. Quantitative determination of potential urine biomarkers of respiratory illnesses using new targeted metabolomic approach. Anal Chim Acta 2018; 1047:81-92. [PMID: 30567667 DOI: 10.1016/j.aca.2018.09.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/12/2018] [Accepted: 09/16/2018] [Indexed: 11/16/2022]
Abstract
The diagnosis of asthma and chronic obstructive pulmonary disease (COPD) can be challenging due to the overlap in their clinical presentations in some patients. There is a need for a more objective clinical test that can be routinely used in primary care settings. Through an untargeted 1H NMR urine metabolomic approach, we identified a set of endogenous metabolites as potential biomarkers for the differentiation of asthma and COPD. A subset of these potential biomarkers contains 7 highly polar metabolites of diverse physicochemical properties. To the best of our knowledge, there is no liquid chromatography-tandem mass spectrometry (LC-MS/MS) method that evaluated more than two of the target metabolites in a single analytical run. The target metabolites belong to the families of monosaccharides, organic acids, amino acids, quaternary ammonium compounds and nucleic acids, rendering hydrophilic interaction liquid chromatography (HILIC) an ideal technology for their quantification. Since a clinical decision is to be made from patients data, a fully validated analytical method is required for biomarker validation. Method validation for endogenous metabolites is a daunting task since current guidelines were designed for exogenous compounds. As such, innovative approaches were adopted to meet the validation requirements. Herein, we describe a sensitive HILIC-MS/MS method for the quantification of the 7 endogenous urinary metabolites. Detection was achieved in the multiple reaction monitoring (MRM) mode with polarity switching, using quadrupole-linear ion trap instrument (QTRAP 6500) as well as single ion monitoring in the negative-ion mode. The method was fully validated according to the regulatory guidelines. Linearity was established between 6 and 21000 ng/mL and quality control samples demonstrated acceptable intra- and inter-day accuracy (85.7%-112%), intra- and inter-day precision (CV% <11.5%) as well as stability under various storage and sample processing conditions. To illustrate the method's applicability, the validated method was applied to the analysis of a small set of urine samples collected from asthma and COPD patients. Preliminary modelling of separation was generated using partial least square discriminant analysis (R2 0.752 and Q2 0.57). The adequate separation between patient samples confirms the diagnostic potential of these target metabolites as a proof-of-concept for the differentiation between asthma and COPD. However, more patient urine samples are needed in order to increase the statistical power of the analytical model.
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Affiliation(s)
- Mona M Khamis
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Darryl J Adamko
- Department of Pediatrics, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Randy W Purves
- Canadian Food Inspection Agency (CFIA), Saskatoon, SK, Canada
| | - Anas El-Aneed
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada.
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14
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Traceability to a primary reference measurement procedure (ID-LCMS); A key step in validating the clinical accuracy and safety of hospital blood glucose monitoring systems. Clin Chim Acta 2018; 486:275-281. [PMID: 30125535 DOI: 10.1016/j.cca.2018.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 08/11/2018] [Accepted: 08/14/2018] [Indexed: 11/22/2022]
Abstract
OBJECTIVE A key step in the evaluation of the accuracy of blood glucose monitoring systems (BGMS) is using a comparator method aligned to a high order definitive reference method. We describe how we achieved traceability to an isotope dilution liquid chromatography mass spectrometry (ID-LCMS) method. We used ID-LCMS to evaluate the accuracy and specificity of two hospital BGMS used in China. METHOD ID-LCMS was used to verify the calibration alignment of the laboratory plasma hexokinase reference method using NIST standard reference material and clinical samples. The ID-LCMS aligned hexokinase method was used to evaluate the clinical accuracy of two BGMS in hospitalized patients. System accuracy was evaluated using Chinese consensus guidelines. BGMS accuracy was also assessed with interference factors known to be present in critically ill patients' blood. RESULTS The laboratory plasma hexokinase reference method was shown to calibrate closely with ID-LCMS. Two BGMS demonstrated good correlation with this reference method. Only one BGMS met the Chinese guidelines. The interference factors didn't influence this BGMS but adversely affected the clinical accuracy of the other. CONCLUSIONS We advocate that our IDMS calibration alignment approach for ensuring the accuracy of the glucose reference method should be adopted in evaluations assessing the accuracy of blood glucose monitoring systems.
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An adapted isotope dilution 1H- 13C heteronuclear single-quantum correlation (ID-HSQC) for rapid and accurate quantification of endogenous and exogenous plasma glucose. Anal Bioanal Chem 2018; 410:6705-6711. [PMID: 30054692 DOI: 10.1007/s00216-018-1276-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 07/07/2018] [Accepted: 07/17/2018] [Indexed: 02/04/2023]
Abstract
A wide variety of methods, such as enzymatic methods, LC-MS, and LC-MS/MS, are currently available for the concentration determination of plasma glucose in studies of diabetes, obesity, exercise, etc. However, these methods rarely discriminate endogenous and exogenous glucose in plasma. A novel NMR strategy for discriminative quantification of the endogenous and exogenous glucose in plasma has been developed using an adapted isotope dilution 1H-13C heteronuclear single-quantum correlation (ID-HSQC) with uniformly 13C-labeled glucose as a tracer of exogenous glucose. This method takes advantage of the distinct 1H-13C chemical shifts of the hemiacetal group of the α-D-glucopyranose and makes use of the 13C-13C one-bond J-coupling (1JCC) in uniformly 13C-labeled glucose to differentiate the 1H-13C HSQC signal of labeled glucose from that of its natural counterpart when data are acquired in high-resolution mode. The molar ratio between the endogenous and exogenous plasma glucose can then be calculated from the peak intensities of the natural and labeled glucose. The accuracy and precision of the method were evaluated using a series of standard mixtures of natural and uniformly 13C-labeled glucose with varied but known concentrations. Application of this method is demonstrated for the quantification of endogenous and exogenous glucose in plasma derived from healthy and diabetic cynomolgus monkeys. The results nicely agree with our previous LC-MS/MS results. Considering the natural abundance of 13C isotope at the level of 1.1% in endogenous glucose, comparable peak intensities of quantitatively measurable signals derived from natural and labeled glucose imply that the ID-HSQC can tolerate a significantly high ratio of isotope dilution, with labeled/natural glucose at ~ 1%. We expect that the ID-HSQC method can serve as an alternative approach to the biomedical or clinical studies of glucose metabolism.
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Mosca A, Paleari R. Sources and performance criteria of uncertainty of reference measurement procedures. Clin Biochem 2018; 57:29-36. [PMID: 29856964 DOI: 10.1016/j.clinbiochem.2018.05.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/09/2018] [Accepted: 05/28/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This article wants to focus on the today available Reference Measurement Procedures (RMPs) for the determination of various analytes in Laboratory Medicine and the possible tools to evaluate their performance in the laboratories who are currently using them. METHODS A brief review on the RMPs has been performed by investigating the Joint Committee for Traceability in Laboratory Medicine (JCTLM) database. In order to evaluate their performances, we have checked the organization of three international ring trials, i.e. those regularly performed by the IFCC External Quality assessment scheme for Reference Laboratories in Laboratory Medicine (RELA), by the Center for Disease Control and Prevention (CDC) cholesterol network and by the IFCC Network for HbA1c. RESULTS Several RMPs are available through the JCTLM database, but the best way to collect information about the RMPs and their uncertainties is to look at the reference measurement service providers (RMS). This part of the database and the background on how to listed in the database is very helpful for the assessment of expanded uncertainty (MU) and performance in general of RMPs. Worldwide, 17 RMS are listed in the database, and for most of the measurands more than one RMS is able to run the relative RMPs, with similar expanded uncertainties. As an example, for a-amylase, 4 SP offer their services with MU between 1.6 and 3.3%. In other cases (such as total cholesterol, the U may span over a broader range, i.e. from 0.02 to 3.6%). With regard to the performance evaluation, the approach is often heterogenous, and it is difficult to compare the performance of laboratories running the same RMP for the same measurand if involved in more than one EQAS. CONCLUSIONS The reference measurement services have been created to help laboratory professionals and manufacturers to implement the correct metrological traceability, and the JCTLM database is the only correct way to retrieve all the necessary important information to this end.
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Affiliation(s)
- Andrea Mosca
- Centre for Metrological Traceability in Laboratory Medicine (CIRME), Dept. of Physiopatholgy and Transplantation, Università degli Studi di Milano, Milano, Italy.
| | - Renata Paleari
- Centre for Metrological Traceability in Laboratory Medicine (CIRME), Dept. of Physiopatholgy and Transplantation, Università degli Studi di Milano, Milano, Italy
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Xi L, Wang T, Zhang D. Embedment of Well Dispersed Nickel Nanoparticles in Sulfonate and Benzimidazole Functionalized Poly (Arylene Ether Ketone) Film for the Electrocatalytic Oxidation of Glucose. ELECTROANAL 2017. [DOI: 10.1002/elan.201700413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lingling Xi
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou 310028 China
| | - Tengfei Wang
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou 310028 China
| | - Danwei Zhang
- Department of Chemistry, Xixi Campus; Zhejiang University; Hangzhou 310028 China
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19
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Determination of serum glucose by isotope dilution liquid chromatography-tandem mass spectrometry: a candidate reference measurement procedure. Anal Bioanal Chem 2016; 408:7403-11. [DOI: 10.1007/s00216-016-9817-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/29/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
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20
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Coelho M, Mendes VM, Lima IS, Martins FO, Fernandes AB, Macedo MP, Jones JG, Manadas B. Direct analysis of [6,6-(2)H2]glucose and [U-(13)C6]glucose dry blood spot enrichments by LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1022:242-248. [PMID: 27107853 DOI: 10.1016/j.jchromb.2016.04.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/29/2022]
Abstract
A liquid chromatography tandem mass spectrometry (LC-MS/MS) using multiple reaction monitoring (MRM) in a triple-quadrupole scan mode was developed and comprehensively validated for the determination of [6,6-(2)H2]glucose and [U-(13)C6]glucose enrichments from dried blood spots (DBS) without prior derivatization. The method is demonstrated with dried blood spots obtained from rats administered with a primed-constant infusion of [U-(13)C6]glucose and an oral glucose load enriched with [6,6-(2)H2]glucose. The sensitivity is sufficient for analysis of the equivalent to <5μL of blood and the overall method was accurate and precise for the determination of DBS isotopic enrichments.
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Affiliation(s)
- Margarida Coelho
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal
| | - Vera M Mendes
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal
| | - Inês S Lima
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal
| | - Fátima O Martins
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal; Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Casa Costa Alemão, Pólo II, Rua Dom Francisco de Lemos, 3030-789 Coimbra, Portugal
| | - Ana B Fernandes
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal
| | - M Paula Macedo
- Chronic Diseases Research Center (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Rua Câmara Pestana n° 6, 6-A Edifício CEDOC II, 1150-082 Lisboa, Portugal; APDP-Portuguese Diabetes Association, Rua Rodrigo da Fonseca, n° 1, 1250-189 Lisboa, Portugal
| | - John G Jones
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal; APDP-Portuguese Diabetes Association, Rua Rodrigo da Fonseca, n° 1, 1250-189 Lisboa, Portugal
| | - Bruno Manadas
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC Biotech, Parque Tecnológico de Cantanhede, Núcleo 04, Lote 8, 3060-197 Cantanhede, Portugal.
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Teo HL, Wong L, Liu Q, Teo TL, Lee TK, Lee HK. Simple and accurate measurement of carbamazepine in surface water by use of porous membrane-protected micro-solid-phase extraction coupled with isotope dilution mass spectrometry. Anal Chim Acta 2016; 912:49-57. [PMID: 26920772 DOI: 10.1016/j.aca.2016.01.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/12/2016] [Accepted: 01/16/2016] [Indexed: 11/19/2022]
Abstract
To achieve fast and accurate analysis of carbamazepine in surface water, we developed a novel porous membrane-protected micro-solid-phase extraction (μ-SPE) method, followed by liquid chromatography-isotope dilution tandem mass spectrometry (LC-IDMS/MS) analysis. The μ-SPE device (∼0.8 × 1 cm) was fabricated by heat-sealing edges of a polypropylene membrane sheet to devise a bag enclosing the sorbent. The analytes (both carbamazepine and isotope-labelled carbamazepine) were first extracted by μ-SPE device in the sample (10 mL) via agitation, then desorbed in an organic solvent (1 mL) via ultrasonication. Several parameters such as organic solvent for pre-conditioning of μ-SPE device, amount of sorbent, adsorption time, and desorption solvent and time were investigated to optimize the μ-SPE efficiency. The optimized method has limits of detection and quantitation estimated to be 0.5 ng L(-1) and 1.6 ng L(-1), respectively. Surface water samples spiked with different amounts of carbamazepine (close to 20, 500, and 1600 ng L(-1), respectively) were analysed for the validation of method precision and accuracy. Good precision was obtained as demonstrated by relative standard deviations of 0.7% for the samples with concentrations of 500 and 1600 ng kg(-1), and 5.8% for the sample with concentration of 20 ng kg(-1). Good accuracy was also demonstrated by the relative recoveries in the range of 96.7%-103.5% for all samples with uncertainties of 1.1%-5.4%. Owing to the same chemical properties of carbamazepine and isotope-labelled carbamazepine, the isotope ratio in the μ-SPE procedure was accurately controlled. The use of μ-SPE coupled with IDMS analysis significantly facilitated the fast and accurate measurement of carbamazepine in surface water.
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Affiliation(s)
- Hui Ling Teo
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore; Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Lingkai Wong
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Qinde Liu
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore.
| | - Tang Lin Teo
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Tong Kooi Lee
- Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Hian Kee Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
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Chen Y, Teo HL, Liu Q, Lee TK. Developing a reference measurement procedure for free glycerol in human serum by two-step gas chromatography–isotope dilution mass spectrometry. Clin Biochem 2015; 48:897-903. [DOI: 10.1016/j.clinbiochem.2015.05.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 05/25/2015] [Accepted: 05/29/2015] [Indexed: 11/26/2022]
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Achieving comparability with IFCC reference method for the measurement of hemoglobin A1c by use of an improved isotope-dilution mass spectrometry method. Anal Bioanal Chem 2015; 407:7579-87. [DOI: 10.1007/s00216-015-8961-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/30/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
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Matsunami RK, Angelides K, Engler DA. Development and Validation of a Rapid (13)C6-Glucose Isotope Dilution UPLC-MRM Mass Spectrometry Method for Use in Determining System Accuracy and Performance of Blood Glucose Monitoring Devices. J Diabetes Sci Technol 2015; 9:1051-60. [PMID: 25986627 PMCID: PMC4667352 DOI: 10.1177/1932296815586015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND There is currently considerable discussion about the accuracy of blood glucose concentrations determined by personal blood glucose monitoring systems (BGMS). To date, the FDA has allowed new BGMS to demonstrate accuracy in reference to other glucose measurement systems that use the same or similar enzymatic-based methods to determine glucose concentration. These types of reference measurement procedures are only comparative in nature and are subject to the same potential sources of error in measurement and system perturbations as the device under evaluation. It would be ideal to have a completely orthogonal primary method that could serve as a true standard reference measurement procedure for establishing the accuracy of new BGMS. METHODS An isotope-dilution liquid chromatography/mass spectrometry (ID-UPLC-MRM) assay was developed using (13)C6-glucose as a stable isotope analogue to specifically measure glucose concentration in human plasma, and validated for use against NIST standard reference materials, and against fresh isolates of whole blood and plasma into which exogenous glucose had been spiked. Assay performance was quantified to NIST-traceable dry weight measures for both glucose and (13)C6-glucose. RESULTS The newly developed assay method was shown to be rapid, highly specific, sensitive, accurate, and precise for measuring plasma glucose levels. The assay displayed sufficient dynamic range and linearity to measure across the range of both normal and diabetic blood glucose levels. Assay performance was measured to within the same uncertainty levels (<1%) as the NIST definitive method for glucose measurement in human serum. CONCLUSIONS The newly developed ID UPLC-MRM assay can serve as a validated reference measurement procedure to which new BGMS can be assessed for glucose measurement performance.
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Affiliation(s)
- Risë K Matsunami
- Proteomics Programmatic Core Laboratory, Houston Methodist Hospital Research Institute, Houston, TX, USA
| | | | - David A Engler
- Proteomics Programmatic Core Laboratory, Houston Methodist Hospital Research Institute, Houston, TX, USA
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Xiao D, Yin J, Ren W, He J, Hu X, Yin Y, Luo W, Yu X. Porcine circovirus type 2 affects the serum profile of amino acids and intestinal expression of amino acid transporters in mice. RSC Adv 2015. [DOI: 10.1039/c5ra12904d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PCV2 is highly pathogenic, however, its effect on the serum amino acids profile is unknown.
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Affiliation(s)
- Dingfu Xiao
- College of Animal Science and Technology
- Hunan Agricultural University
- Changsha
- China
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central
| | - Jie Yin
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central
- Ministry of Agriculture
- Hunan Provincial Engineering Research Center of Healthy Livestock
- Key Laboratory of Agro-Ecological Processes in Subtropical Region
- Institute of Subtropical Agriculture
| | - Wenkai Ren
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central
- Ministry of Agriculture
- Hunan Provincial Engineering Research Center of Healthy Livestock
- Key Laboratory of Agro-Ecological Processes in Subtropical Region
- Institute of Subtropical Agriculture
| | - Jianhua He
- College of Animal Science and Technology
- Hunan Agricultural University
- Changsha
- China
- Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients
| | - Xionggui Hu
- Hunan Institute of Animal and Veterinary Science
- Changsha
- China
| | - Yulong Yin
- Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central
- Ministry of Agriculture
- Hunan Provincial Engineering Research Center of Healthy Livestock
- Key Laboratory of Agro-Ecological Processes in Subtropical Region
- Institute of Subtropical Agriculture
| | - Wei Luo
- College of Veterinarian Sciences
- Hunan Agricultural University
- Changsha
- China
| | - Xinglong Yu
- College of Veterinarian Sciences
- Hunan Agricultural University
- Changsha
- China
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Bornø A, Foged L, van Hall G. Glucose and glycerol concentrations and their tracer enrichment measurements using liquid chromatography tandem mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:980-988. [PMID: 25303387 DOI: 10.1002/jms.3407] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/26/2014] [Accepted: 06/01/2014] [Indexed: 06/04/2023]
Abstract
The present study describes a new liquid chromatography tandem mass spectrometry method for high-throughput quantification of glucose and glycerol in human plasma using stable isotopically labeled internal standards and is suitable for simultaneous measurements of glucose and glycerol enrichments in connection to in vivo metabolic studies investigating glucose turnover and lipolytic rate. Moreover, in order to keep up with this new fast analysis, simple derivatization procedures have been developed. Prior to analysis, glucose and glycerol were derivatized using benzoyl chloride in order to form benzoylated derivatives via new simplified fast procedures. For glucose, two internal standards were evaluated, [U-(13) C(6)]glucose and [U-(13) C(6), D(7)]glucose, and for glycerol, [U-(13) C(3), D(8)]glycerol was used. The method was validated by means of calibration curves, quality control samples, and plasma samples spiked with [6,6-D(2)]glucose, [U-(13) C(6)]glucose, and [1,1,2,3,3-D(5)]glycerol in order to test accuracy, precision, and recovery of the method. Moreover, post preparative and freeze-thaw sample stability were tested. The correlation of calibration curves for the glucose concentration were r(2) = 0.9998 for [U-(13) C(6)]glucose and r(2) = 0.9996 for [U-(13) C(6), D(7)]glucose, and r(2) = 0.9995 for the glycerol concentration. Interday accuracy for glucose using [U-(13) C(6)]glucose and glycerol determined in spiked plasma were respectively 103.5% and 106.0%, and the coefficients of variation were 2.0% and 9.7%, respectively. After derivatization, plasma samples were stable for at least 14 days. In conclusion, we have developed and validated a novel, accurate, and sensitive high-throughput liquid chromatography tandem mass spectrometry method for simultaneous determination of glucose and glycerol concentrations and enrichment of infused tracers most commonly used in human metabolic kinetic studies.
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Affiliation(s)
- Andreas Bornø
- Clinical Metabolomics Core Facility (CMCF), Rigshospitalet, section 7652, Ole Maaløesvej 26, 2100, Copenhagen Ø, Denmark
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Quantification of recombinant human erythropoietin by amino acid analysis using isotope dilution liquid chromatography–tandem mass spectrometry. Anal Bioanal Chem 2014; 406:4401-9. [DOI: 10.1007/s00216-014-7838-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/09/2014] [Accepted: 04/14/2014] [Indexed: 10/25/2022]
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28
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Chen Y, Liu Q, Yong S, Teo HL, Lee TK. An improved reference measurement procedure for triglycerides and total glycerides in human serum by isotope dilution gas chromatography–mass spectrometry. Clin Chim Acta 2014. [DOI: 10.1016/j.cca.2013.10.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lee HS, Lee JM, Park SR, Lee JH, Kim YG. Development and Validation of Primary Method for the Determination of Glucose in Human Serum by Isotope Dilution Liquid Chromatography Tandem Mass Spectrometry and Comparison with Field Methods. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.6.1698] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Bo H, Wang C, Gao Q, Qi H, Zhang C. Selective, colorimetric assay of glucose in urine using G-quadruplex-based DNAzymes and 10-acetyl-3,7-dihydroxy phenoxazine. Talanta 2013; 108:131-5. [DOI: 10.1016/j.talanta.2013.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 03/01/2013] [Accepted: 03/01/2013] [Indexed: 01/29/2023]
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Delatour V, Lalere B, Saint-Albin K, Peignaux M, Hattchouel JM, Dumont G, De Graeve J, Vaslin-Reimann S, Gillery P. Continuous improvement of medical test reliability using reference methods and matrix-corrected target values in proficiency testing schemes: application to glucose assay. Clin Chim Acta 2012; 413:1872-8. [PMID: 22885373 DOI: 10.1016/j.cca.2012.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 07/12/2012] [Accepted: 07/24/2012] [Indexed: 10/28/2022]
Abstract
The reliability of biological tests is a major issue for patient care in terms of public health that involves high economic stakes. Reference methods, as well as regular external quality assessment schemes (EQAS), are needed to monitor the analytical performance of field methods. However, control material commutability is a major concern to assess method accuracy. To overcome material non-commutability, we investigated the possibility of using lyophilized serum samples together with a limited number of frozen serum samples to assign matrix-corrected target values, taking the example of glucose assays. Trueness of the current glucose assays was first measured against a primary reference method by using human frozen sera. Methods using hexokinase and glucose oxidase with spectroreflectometric detection proved very accurate, with bias ranging between -2.2% and +2.3%. Bias of methods using glucose oxidase with spectrophotometric detection was +4.5%. Matrix-related bias of the lyophilized materials was then determined and ranged from +2.5% to -14.4%. Matrix-corrected target values were assigned and used to assess trueness of 22 sub-peer groups. We demonstrated that matrix-corrected target values can be a valuable tool to assess field method accuracy in large scale surveys where commutable materials are not available in sufficient amount with acceptable costs.
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Affiliation(s)
- Vincent Delatour
- Laboratoire National de Métrologie et d'Essais, Department of Biomedical and Organic Chemistry, Paris, France.
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