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MacNeill R, Thomas S, Anand P, Koleto M, Powers B, Ledvina A. The Origin-Adjusted Approach for Reliable Quantification of Endogenous Analytes in Mass Spectrometric Bioanalysis. ACS OMEGA 2022; 7:47372-47377. [PMID: 36570202 PMCID: PMC9774370 DOI: 10.1021/acsomega.2c06850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
The reliably accurate and precise quantification of biomarkers is a priceless objective in the drug development and diagnostic arenas. To employ a technique that brings such reliability and furthermore involves a simpler, faster, and inexpensive regime would only underline the potential importance of the concept and technique. To the existing established approaches for biomarker quantification in bioanalytical LC-MS, surrogate matrix (SUR-M) and surrogate analyte (SUR-A), in this Letter we present an approach that fulfills the aforementioned advantages. The concept builds on the historic method of standard addition (SA), in which one source of biological matrix is spiked with analyte to form a calibration curve. With the SA curve back-calculated, the heart of this procedure is the subsequent adjustment of the intercept to zero, the origin, and using only the slope of the curve for interpolation giving calculated sample concentrations. In SA, the concentration axis intercept indicates the endogenous analyte concentration, and our zeroing of this is equivalent to removing the endogenous level. This key shift of the calculated line to the origin unveils our novel origin-adjusted (OA) approach. It enables use akin to a regular xenobiotic method, with no need to ultimately account for the endogenous analyte level in the control matrix used for calibrants. We present a comparison of OA against the control approach of SUR-M in a representative application for kynurenine and tryptophan in human plasma by LC-MS. A numerical performance analysis performed is demonstrative of equivalence between the two approaches for both analytes.
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2
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Assessment of creatinine concentration in whole blood spheroids using paper spray ionization-tandem mass spectrometry. Sci Rep 2022; 12:14308. [PMID: 35995992 PMCID: PMC9395369 DOI: 10.1038/s41598-022-18365-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/10/2022] [Indexed: 11/08/2022] Open
Abstract
Accurate quantification of blood creatinine is important to estimate the glomerular filtration rate. Existing techniques using liquid chromatography tandem mass spectrometry (LC–MS/MS) have a high accuracy and eliminate most interferences encountered in routine enzymatic and Jaffé methods. However, they require laborious and time-consuming sample treatment and data acquisition. The aim of this study is to develop a fast and simple method to enable a direct analysis of whole blood creatinine with performance measures that are comparable to conventional LC–MS/MS. 5μL whole blood is formed as a three-dimensional spheroid on hydrophobic silanized paper substrates which then undergoes paper-spray ionization—tandem mass spectrometry (PSI–MS/MS). The method is validated using real human samples and compared with LC–MS/MS. PSI–MS/MS whole blood analysis exhibited a lower limit of quantification of 2.5 μg/mL, precision ≤ 6.3%, recovery in the range of 88–94% and excellent linearity (R2 > 0.99; 2.5—20 μg/mL) covering the normal range for creatinine levels. Creatinine levels were comparable to those measured by LC–MS/MS with small deviations of less than 0.3 μg/mL. This simple, fast and accurate microsampling technique for direct analysis of creatinine from whole blood shows promise for routine clinical screening and monitoring. This approach can be readily extended for other analytes of interest and, due to inherent advantages relating to cost, storability, speed, and simplicity, it can be especially advantageous for use in resource-limited settings.
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The biomarker bandwagon's quantitative quandary: 10 years of tuning. Bioanalysis 2022; 14:387-391. [PMID: 35234048 DOI: 10.4155/bio-2022-0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Kang L, Liu J, Zhang H, Jiang M, Jin Y, Zhang M, Hu P. Improved ultra-high performance liquid chromatographic method for simultaneous determination of five gout-related metabolites in human serum. J Sep Sci 2020; 44:954-962. [PMID: 33348445 DOI: 10.1002/jssc.202000974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/13/2020] [Accepted: 12/16/2020] [Indexed: 12/19/2022]
Abstract
Creatinine and purines are gout-related metabolites commonly quantified by liquid chromatography coupled with ultraviolet and mass spectrometry. However, the high cost of liquid chromatography coupled with mass spectrometry hindered its extensive use in ordinary hospitals and clinical laboratories. Using the traditional liquid chromatography method, the full separation of these metabolites in complex biological samples is still not achieved. In this study, an improved ultra-high-performance liquid chromatography with ultraviolet spectroscopy method was reported for quantitative determination of five gout-related metabolites (i.e., creatinine, uric acid, hypoxanthine, xanthine, and inosine) in human serum within 10 min. A UHPLC system equipped with a hydrophilic C18 column was used to improve separation, shorten analysis time, and increase analysis throughput. The performance of the method was validated by evaluating linearity (squared correlation coefficient > 0.9991), recovery (92.8-100.0%, with relative standard deviation < 4.7%), accuracy (relative errors < 14.6%), precision (0.2-4.1% for intraday and 2.1-7.3% for interday) and stability (-14.1 to 8.3% in autosampler for 12 h and -13.3 to 2.2% for freeze-thaw cycles). This method was successfully applied to quantify gout-related metabolites in serum samples of healthy controls and gout patients, which was expected to be used in the clinical investigation of gout at different stages.
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Affiliation(s)
- Lu Kang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, P. R. China
| | - Ju Liu
- Department of Rheumatology, Jiujiang First People's Hospital, Jiujiang, P. R. China
| | - Hongyang Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, P. R. China.,Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Min Jiang
- Department of Rheumatology, Jiujiang First People's Hospital, Jiujiang, P. R. China
| | - Yidian Jin
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, P. R. China
| | - Min Zhang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Ping Hu
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, P. R. China
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Yildirimel M, Atalar MN, Abusoglu S, Eryavuz Onmaz D, Sivrikaya A, Abusoglu G, Unlu A. Measurement of serum creatinine levels with liquid chromatography-tandem mass spectrometry: comparison with Jaffe and enzymatic methods. ACTA ACUST UNITED AC 2020. [DOI: 10.1515/tjb-2019-0357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
Objectives
Our aim was to validate a mass spectrometric creatinine method and compare this method with Jaffe and enzymatic serum creatinine methods.
Methods
90 samples were included. The levels were classified into three groups according to serum creatinine results as Group 1: Lower (n=30) (0.16–0.59 mg/dL), Group 2: Normal (n=30) (0.62–1.18 mg/dL) and Group 3: Higher (n=30) (1.33–3.88 mg/dL). Jaffe and enzymatic creatinine measurements were performed on the Beckman Coulter AU5800 autoanalyzer.
Results
Serum creatinine was linear from 0.039 up to 10 mg/dL, CV and bias values were ranged between 1.9–3.8% and 2–15%. Correlation coefficients were 0.990 (95% confidence interval 0.984–0.993), 0.992 (95% confidence interval 0.988–0.995) and 0.994 (95% confidence interval 0.991–0.996) for LC-MS/MS-Enzymatic, LC-MS/MS-Jaffe and Enzymatic-Jaffe, respectively.
Conclusions
Although, Jaffe method for serum creatinine measurement is still much more practical and cheap, so in use for routine practice, tandem mass spectrometric detection of serum creatinine can be used as an accurate and specific method for verification of discordant clinical results, existence of possible interferences and serum levels under 0.5 mg/dL creatinine results such as pediatric or pregnant populations.
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Affiliation(s)
- Mehmet Yildirimel
- Selcuk University Faculty of Medicine , Department of Biochemistry , Konya , Turkey
| | - Mehmet Nuri Atalar
- Igdir University , Faculty of Science and Letters , Department of Biochemistry , Igdir , Turkey
| | - Sedat Abusoglu
- Selcuk University Faculty of Medicine , Department of Biochemistry , Konya , Turkey
| | - Duygu Eryavuz Onmaz
- Selcuk University Faculty of Medicine , Department of Biochemistry , Konya , Turkey
| | - Abdullah Sivrikaya
- Selcuk University Faculty of Medicine , Department of Biochemistry , Konya , Turkey
| | - Gulsum Abusoglu
- Selcuk University Vocational School of Health , Department of Medical Laboratory Techniques , Konya , Turkey
| | - Ali Unlu
- Selcuk University Faculty of Medicine , Department of Biochemistry , Konya , Turkey
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Zan B, Liu X, Zhao Y, Shi R, Sun X, Wang T, Li Y, Liu S, Yang L, Ma Y. A validated surrogate analyte UPLC-MS/MS assay for quantitation of TUDCA, TCDCA, UDCA and CDCA in rat plasma: Application in a pharmacokinetic study of cultured bear bile powder. Biomed Chromatogr 2020; 34:e4835. [PMID: 32198899 DOI: 10.1002/bmc.4835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/25/2020] [Accepted: 03/17/2020] [Indexed: 12/15/2022]
Abstract
Bear bile is a valuable medicinal material used in traditional Chinese medicine for over 2000 years. However, developing a substitute has become necessary because of protection measures for this endangered species. The ingredients of in vitro cultured bear bile powder (CBBP) include tauroursodeoxycholic acid (TUDCA), taurochenodeoxycholic acid (TCDCA), ursodeoxycholic acid (UDCA) and chenodeoxycholic acid (CDCA, and it has pharmacological properties that are similar to those of natural bear bile powder (NBBP). In this study, the pharmacokinetic parameters of both CBBP and NBBP were measured in rats with a new surrogate analyte LC-MS method using stable isotopes as surrogate analytes (D4-TUDCA, D4-TCDCA, D4-UDCA and D4-CDCA) with response factors validated in authentic matrix (plasma) for simultaneously monitoring the authentic analytes (TUDCA, TCDCA, UDCA and CDCA). The method validation was satisfactory for the linear regression (r, 0.9975-0.9994), precision (RSD intra-day, 0.72-9.35%; inter-day, 3.82-9.02%), accuracy (RE, -12.42-5.67%) and matrix effect (95.53-99.80%), along with analyte recovery (95.90-98.82%) and stability (89.48-101.81%) of surrogate analytes, and precision (RSD intra-day, 1.06- 11.51%; inter-day, 2.23- 11.38%), accuracy (RE, -7.40-10.76%) and stability (87.37-111.70%) of authentic analytes. We successfully applied this method to evaluate the pharmacokinetics of CBBP and NBBP in rats, which revealed the critical in vivo properties of both bear bile preparations.
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Affiliation(s)
- Bin Zan
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xinhua Liu
- Science and Technology Experimental Center, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yining Zhao
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Rong Shi
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaoshu Sun
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tianming Wang
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuanyuan Li
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shaoyong Liu
- Shanghai Kai Bao Pharmaceutical CO. Ltd., Shanghai, China
| | - Li Yang
- The Ministry of Education Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yueming Ma
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai Key Laboratory of Compound Chinese Medicines, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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da Silva ACC, de Lima Feltraco Lizot L, Bastiani MF, Antunes MV, Brucker N, Linden R. Ready for TDM: Simultaneous quantification of amikacin, vancomycin and creatinine in human plasma employing ultra-performance liquid chromatography-tandem mass spectrometry. Clin Biochem 2019; 70:39-45. [PMID: 31228434 DOI: 10.1016/j.clinbiochem.2019.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 06/18/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND Amikacin (AMI) and vancomycin (VAN) are antibiotics largely used in intensive care in the empiric treatment of severe infections by multi-resistant gram-negative and gram-positive bacteria. AMI and VAN are eliminated untransformed by glomerular filtration, showing depuration ratio highly correlated with creatinine (CRE) clearance. AMI, VAN and CRE are highly polar structures, presenting poor retention in reversed-phase liquid chromatography when using conventional stationary phases. OBJECTIVE This study aimed to develop and validate a simple UPLC-MS/MS method for simultaneous determination of AMI, VAN, and CRE in human plasma for therapeutic drug monitoring. RESULTS Samples were prepared by protein precipitation, followed by dilution. Heptafluorobutyric acid (HFBA) was added to the mobile phase at low concentration (0.01%), and separation was performed in an ultra-performance reversed-phase column (particle diameter of 1.8 μm). These conditions allowed retention times of 0.92, 0.93, 2.12, 2.17 and 2.27 min for CRE, CRE-D3, AMI, KAN and VAN, respectively. The assay was linear from 0.5 to 100 mg L-1 for AMI and VAN and 5 to 100 mg L-1. Precision, accuracy and stability assays were acceptable according to bioanalytical validation guidelines. Suitable results. Matrix effects were in the range of +10.5 to +11.6% for AMI, -4.3 to -4.5% for VAN, and - 1.7 to +0.7 for CRE. CONCLUSION The first assay for the simultaneous determination of AMI, VAN and CRE in plasma by liquid chromatography-tandem mass spectrometry was reported. This assay allows the obtention of the necessary analytical data for the clinical application of population pharmacokinetic methods for therapeutic drug monitoring of AMI and VAN.
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Affiliation(s)
- Anne Caroline Cezimbra da Silva
- Analytical Toxicology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil; Graduate Program on Toxicology and Analytical Toxicology, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Lilian de Lima Feltraco Lizot
- Analytical Toxicology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil; Graduate Program on Toxicology and Analytical Toxicology, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Marcos Frank Bastiani
- Analytical Toxicology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil; Graduate Program on Toxicology and Analytical Toxicology, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Marina Venzon Antunes
- Analytical Toxicology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil; Graduate Program on Toxicology and Analytical Toxicology, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Natália Brucker
- Graduate Program on Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Rafael Linden
- Analytical Toxicology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil; Graduate Program on Toxicology and Analytical Toxicology, Universidade Feevale, Novo Hamburgo, RS, Brazil.
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Yuan Y, Jiang M, Zhang H, Liu J, Zhang M, Hu P. Simultaneous quantification of urinary purines and creatinine by ultra high performance liquid chromatography with ultraviolet spectroscopy and quadrupole time‐of‐flight mass spectrometry: Method development, validation, and application to gout study. J Sep Sci 2019; 42:2523-2533. [PMID: 31144454 DOI: 10.1002/jssc.201900170] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/25/2019] [Accepted: 05/27/2019] [Indexed: 01/21/2023]
Affiliation(s)
- Yuan Yuan
- School of Chemistry and Molecular EngineeringEast China University of Science and Technology Shanghai P. R. China
| | - Min Jiang
- Department of RheumatologyJiujiang First People's Hospital Jiujiang P. R. China
| | - Hongyang Zhang
- School of Chemistry and Molecular EngineeringEast China University of Science and Technology Shanghai P. R. China
- Shanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai P. R. China
| | - Ju Liu
- Department of RheumatologyJiujiang First People's Hospital Jiujiang P. R. China
| | - Min Zhang
- Shanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology Shanghai P. R. China
| | - Ping Hu
- School of Chemistry and Molecular EngineeringEast China University of Science and Technology Shanghai P. R. China
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9
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Immunoaffinity LC–MS/MS for quantitative determination of a free and total protein target as a target engagement biomarker. Bioanalysis 2017; 9:1573-1588. [DOI: 10.4155/bio-2017-0152] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: IP-10 is a protein target for the treatment of Crohn's disease. Inhibition of IP-10 by anti-IP-10 mAbs neutralizes its various biological activities. The measurement of free IP-10 suppression as a target engagement biomarker is required for the assessment of drug effect on the target. Results: The development of highly sensitive immunoaffinity-LC–MS/MS assays for quantifying free and total IP-10 in cynomolgus monkey serum is reported for the first time. This paper details strategies for maximizing assay sensitivity by selecting digestion routes, and optimizing immunocapture to achieve full recovery and minimal matrix effect. For the free IP-10 assay, bioanalytical strategies have been established to minimize drug/ligand dissociation. Conclusion: The assays have been implemented for target engagement measurement, pharmacokinetic-pharmacodynamic correlation, and human dose projections.
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