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Pilařová V, Socas-Rodríguez B, Nováková L, Holm C, Sandahl M, Turner C. Analysis of vitamin D and its metabolites in biological samples - Part II: Optimization of a sample preparation method for liver tissue. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1237:124088. [PMID: 38520897 DOI: 10.1016/j.jchromb.2024.124088] [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: 12/14/2023] [Revised: 02/18/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
Extraction of vitamin D, including its hydroxylated and esterified metabolites, from soft tissues such as the liver is challenging due to the lipophilic character of matrix and analytes that are expected in very low concentration levels. In this study, we aimed at the optimization of two-step extraction using solid-liquid extraction as the first step, followed by solid-phase extraction. Various solvents, including ethanol, acetonitrile, methanol, acetone, heptane, and heptane with isopropanol, were investigated to isolate vitamin D compounds from liver tissue in the first step. Acetone was finally selected as the most suitable solvent for the solid-liquid extraction, with the highest recovery in the range of 67 - 98% for polar hydroxylated forms and 3 - 28% for lipophilic vitamin D and esters. Two solid phase extraction (SPE) based on the (i) "bind and elute strategy" and (ii) "removal strategy" using hydrophilic-lipophilic balanced SPE sorbent were optimized as a proceeding step for acetone extracts to increase the method selectivity. Finally, two optimized methods, combining solid-liquid extraction and individual SPE strategy, were examined in terms of sensitivity, recovery, matrix effect, accuracy, and precision. The limits of quantification were in the range of 1 - 10 ng/mL and 3 - 20 ng/mL analyzed by ultra-high performance supercritical fluid chromatography and ultra-high performance liquid chromatography hyphenated a with tandem mass spectrometer, respectively. The absolute recovery determined for the "bind and elute strategy" protocol was in the range of 3 - 24 %. Nevertheless, this method was free of matrix effects, which were determined to be in the 73 - 120 % range. On the contrary, the "removal strategy" approach provided higher recovery values for all compounds (47 - 123 %), but the results for nonpolar vitamin D and esters were strongly affected by signal suppression (matrix effects 3 - 51 %). Both methods fulfilled the criteria for accuracy and precision requested by the European Medicine Agency Guideline on Bioanalysis. "Removal strategy" SPE with decreased manual intervention and lower solvent consumption was finally applied to mouse liver tissue to determine vitamin D and its hydroxylated and esterified metabolites for the first time. The results, i.e., vitamin D esters detected in liver tissue, supported the notion that esters of vitamin D can be stored in lipophilic tissues to release vitamin D.
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Affiliation(s)
- Veronika Pilařová
- Lund University, Department of Chemistry, Centre for Analysis and Synthesis, Lund, Sweden; Charles University, Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Hradec Králové, Czech Republic
| | - Bárbara Socas-Rodríguez
- Lund University, Department of Chemistry, Centre for Analysis and Synthesis, Lund, Sweden; University of La Laguna, Department of Chemistry, Faculty of Science, Santa Cruz de Tenerife, Spain
| | - Lucie Nováková
- Charles University, Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Hradec Králové, Czech Republic
| | - Cecilia Holm
- Lund University, Department of Experimental Medical Science, Faculty of Medicine, Lund, Sweden
| | - Margareta Sandahl
- Lund University, Department of Chemistry, Centre for Analysis and Synthesis, Lund, Sweden
| | - Charlotta Turner
- Lund University, Department of Chemistry, Centre for Analysis and Synthesis, Lund, Sweden.
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Xu Z, Yu K, Zhang M, Ju Y, He J, Jiang Y, Li Y, Jiang J. Accurate Clinical Detection of Vitamin D by Mass Spectrometry: A Review. Crit Rev Anal Chem 2024:1-25. [PMID: 38376891 DOI: 10.1080/10408347.2024.2316237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Vitamin D deficiency is thought to be associated with a wide range of diseases, including diabetes, cancer, depression, neurodegenerative diseases, and cardiovascular and cerebrovascular diseases. This vitamin D deficiency is a global epidemic affecting both developing and developed countries and therefore qualitative and quantitative analysis of vitamin D in a clinical context is essential. Mass spectrometry has played an increasingly important role in the clinical analysis of vitamin D because of its accuracy, sensitivity, specificity, and the ability to detect multiple substances at the same time. Despite their many advantages, mass spectrometry-based methods are not without analytical challenges. Front-end and back-end challenges such as protein precipitation, analyte extraction, derivatization, mass spectrometer functionality, must be carefully considered to provide accurate and robust analysis of vitamin D through a well-designed approach with continuous control by internal and external quality control. Therefore, the aim of this review is to provide a comprehensive overview of the development of mass spectrometry methods for vitamin D accurate analysis, including emphasis on status markers, deleterious effects of biological matrices, derivatization reactions, effects of ionization sources, contribution of epimers, standardization of assays between laboratories.
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Affiliation(s)
- Zhilong Xu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
| | - Kai Yu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
| | - Meng Zhang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
| | - Yun Ju
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
| | - Jing He
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
| | - Yanxiao Jiang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
| | - Yunuo Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, China
| | - Jie Jiang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
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Patriota P, Guessous I, Rezzi S, Marques-Vidal P. Vitamin D Levels Are Associated with Cardiovascular Disease Events but Not with Cardiovascular Disease or Overall Mortality: A Prospective Population-Based Study. Nutrients 2023; 15:4046. [PMID: 37764829 PMCID: PMC10534692 DOI: 10.3390/nu15184046] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
(1) Background: A recent review concluded that there was no strong evidence for beneficial vitamin D effects on cardiovascular disease (CVD) risk, but whether individuals with vitamin D deficiency have a higher risk of CVD should be further studied. (2) Aims: We assessed the association between vitamin D levels and CVD events, CVD mortality, and overall mortality in a prospective population-based study in Lausanne, Switzerland. (3) Methods: A total of 5684 participants (53.6% women, 52.5 ± 10.7 years) were followed for a median of 14.4 years [interquartile range: 10.7-16.6]. Vitamin D blood levels were categorized as normal (≥75 nmol/L or 30 ng/mL), insufficient (50-74 nmol/L or 21-29 ng/mL), and deficient (<50 nmol/L or 20 ng/mL). (4) Results: In total, 568 cardiovascular events, 114 cardiovascular deaths, and 679 deaths occurred during follow-up. After multivariate analysis, vitamin D levels were negatively associated with CVD events: hazard ratio and (95% confidence interval) for a 10 nmol/L increase: 0.96 (0.92-0.99). However, no association was found for CVD [0.93 (0.84-1.04)] and overall mortality [0.98 (0.94-1.02)]. No associations were found between vitamin D categories and CVD events, 0.93 (0.71-1.22) and 1.14 (0.87-1.49); CVD deaths, 0.78 (0.41-1.50) and 1.10 (0.57-2.12); and overall mortality, 1.10 (0.82-1.48); and 1.17 (0.87-1.58) for insufficiency and deficiency, respectively. After excluding participants taking vitamin D supplements, similar results were obtained. (5) Conclusion: In this prospective population-based study, vitamin D levels were inversely associated with CVD events but not with CVD or overall mortality.
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Affiliation(s)
| | - Idris Guessous
- Division of Primary Care Medicine, Department of Primary Care Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland;
| | - Serge Rezzi
- Swiss Nutrition and Health Foundation, 1066 Epalinges, Switzerland;
| | - Pedro Marques-Vidal
- Department of Medicine, Internal Medicine, Lausanne University Hospital and University of Lausanne, 46 rue du Bugnon, 1011 Lausanne, Switzerland;
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Tuma C, Thomas A, Braun H, Thevis M. Quantification of 25-hydroxyvitamin D 2 and D 3 in Mitra® devices with volumetric absorptive microsampling technology (VAMS®) by UHPLC-HRMS for regular vitamin D status monitoring. J Pharm Biomed Anal 2023; 228:115314. [PMID: 36870118 DOI: 10.1016/j.jpba.2023.115314] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023]
Abstract
The numbers of vitamin D inadequacies has reportedly increased in the general population, especially in the Northern hemisphere. However, routine measurement of 25(OH) vitamin D is usually associated with a substantial effort due to the requirement of a venous blood sample taken by medical professionals. Thus, the objective of this work is to develop and validate an easy and minimal-invasive method, using a microsampling technique for autonomous blood collections by medically untrained individuals. The assay enables a simplified monitoring of the vitamin D-status in both, risk group and normal population throughout the year. For this purpose, a simple methanol extraction without derivatization combined with a UHPLC-HRMS method was developed to quantify 25(OH)D2 and 25(OH)D3 in capillary blood. For sample collection, a 20 μl Mitra® device with VAMS® technology is used. By employing the six-fold deuterium-labelled 25(OH)D3 as internal standard, the validated assay provides accurate (<10%) and precise (<11%) results. With a LOQ of 5 ng/ml, the approach also proved sensitive enough to adequately identify potential vitamin D deficiencies (< 12 ng/ml), and proof-of-concept analyses of authentic VAMS® samples (n = 20) yielded test results in the expected blood concentration range. Implementing VAMS® sampling for vitamin D-status monitoring enables a higher frequency due to a simplified, straightforward, and time-effective sample collection. VAMS® assures accurate sample volumes because of its absorptive capacities and, thus, area bias and homogeneity issues associated with conventional DBS are avoided. Regular monitoring of 25(OH)D status throughout the year supports people in high-risk groups for vitamin D-deficiency by early identifying inadequacies and, thus, preventing adverse health consequences.
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Affiliation(s)
- Chiara Tuma
- Institute of Biochemistry/ Center of Preventive Doping Research, German Sport University Cologne, Cologne, Germany; German Research Centre of Elite Sports (momentum), German Sport University Cologne, Cologne, Germany
| | - Andreas Thomas
- Institute of Biochemistry/ Center of Preventive Doping Research, German Sport University Cologne, Cologne, Germany
| | - Hans Braun
- Institute of Biochemistry/ Center of Preventive Doping Research, German Sport University Cologne, Cologne, Germany; German Research Centre of Elite Sports (momentum), German Sport University Cologne, Cologne, Germany
| | - Mario Thevis
- Institute of Biochemistry/ Center of Preventive Doping Research, German Sport University Cologne, Cologne, Germany; European Monitoring Center for Emerging Doping Agents, Cologne, Germany.
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Janoušek J, Pilařová V, Macáková K, Nomura A, Veiga-Matos J, Silva DDD, Remião F, Saso L, Malá-Ládová K, Malý J, Nováková L, Mladěnka P. Vitamin D: sources, physiological role, biokinetics, deficiency, therapeutic use, toxicity, and overview of analytical methods for detection of vitamin D and its metabolites. Crit Rev Clin Lab Sci 2022; 59:517-554. [PMID: 35575431 DOI: 10.1080/10408363.2022.2070595] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Vitamin D has a well-known role in the calcium homeostasis associated with the maintenance of healthy bones. It increases the efficiency of the intestinal absorption of dietary calcium, reduces calcium losses in urine, and mobilizes calcium stored in the skeleton. However, vitamin D receptors are present ubiquitously in the human body and indeed, vitamin D has a plethora of non-calcemic functions. In contrast to most vitamins, sufficient vitamin D can be synthesized in human skin. However, its production can be markedly decreased due to factors such as clothing, sunscreens, intentional avoidance of the direct sunlight, or the high latitude of the residence. Indeed, more than one billion people worldwide are vitamin D deficient, and the deficiency is frequently undiagnosed. The chronic deficiency is not only associated with rickets/osteomalacia/osteoporosis but it is also linked to a higher risk of hypertension, type 1 diabetes, multiple sclerosis, or cancer. Supplementation of vitamin D may be hence beneficial, but the intake of vitamin D should be under the supervision of health professionals because overdosing leads to intoxication with severe health consequences. For monitoring vitamin D, several analytical methods are employed, and their advantages and disadvantages are discussed in detail in this review.
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Affiliation(s)
- Jiří Janoušek
- Department of Pharmacognosy, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Veronika Pilařová
- Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Kateřina Macáková
- Department of Pharmacognosy, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Anderson Nomura
- UCIBIO - Applied Molecular Biosciences Unit, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Jéssica Veiga-Matos
- UCIBIO - Applied Molecular Biosciences Unit, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Diana Dias da Silva
- UCIBIO - Applied Molecular Biosciences Unit, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal.,TOXRUN - Toxicology Research Unit, University Institute of Health Sciences, CESPU CRL, Gandra, Portugal
| | - Fernando Remião
- UCIBIO - Applied Molecular Biosciences Unit, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Rome, Italy
| | - Kateřina Malá-Ládová
- Department of Social and Clinical Pharmacy, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Josef Malý
- Department of Social and Clinical Pharmacy, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
| | - Přemysl Mladěnka
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Hradec Králové, Czech Republic
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6
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Patriota P, Rezzi S, Guessous I, Marques-Vidal P. Association between anthropometric markers of adiposity, adipokines and vitamin D levels. Sci Rep 2022; 12:15435. [PMID: 36104384 PMCID: PMC9474508 DOI: 10.1038/s41598-022-19409-9] [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: 03/25/2022] [Accepted: 08/29/2022] [Indexed: 11/12/2022] Open
Abstract
Inverse association between serum levels of vitamin D and obesity has been pointed out in several studies. Our aim was to identify to the associations between vitamin D levels and a large panel of anthropometric markers and adipokines. Cross-sectional study including 6485 participants. Anthropometric markers included body mass index (BMI), % body fat, waist, waist-to-hip (WHR), waist-to-height (WHtR), conicity index, body roundness index (BRI) and a body shape index (ABSI). 55.7% of women and 60.1% of men presented with vitamin D deficiency. Vitamin D levels were negatively associated with most anthropometric markers, with correlation coefficients ranging between −0.017 (ABSI) and −0.192 (BMI) in women and between −0.026 (weight) and −0.130 (% body fat) in men. Vitamin D levels were inversely associated with leptin levels in both sexes and positively associated with adiponectin levels in women only. The likelihood of vitamin D deficiency increased with increasing adiposity levels, except for ABSI (women) and BMI (men). Total body fat, rather than localized or unevenly distributed body fat, is the adiposity marker most associated with decreased vitamin D levels. Monitoring vitamin D levels in people with overweight/obesity is essential.
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7
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No Association between Vitamin D and Weight Gain: A Prospective, Population-Based Study. Nutrients 2022; 14:nu14153185. [PMID: 35956360 PMCID: PMC9370694 DOI: 10.3390/nu14153185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/21/2022] [Accepted: 07/29/2022] [Indexed: 01/27/2023] Open
Abstract
Background: The association between vitamin D and weight gain remains controversial due to important limitations in the studies. We investigated the relationship between vitamin D levels and 5 and 10 years of weight and waist circumference change in a population-based prospective cohort study. Methods: Prospective study including participants aged between 35 and 75 years living in the city of Lausanne, Switzerland. Weight and waist change at 5- and 10-year follow-up were assessed according to baseline vitamin D status (normal, insufficiency and deficiency). Results: A total of 3638 participants (47.9 % women, mean age 51.6 ± 10.4 years) were included for the 5-year follow-up. No association was found between vitamin D categories and weight change, multivariate-adjusted average ± standard error: 1.6 ± 0.3, 1.5 ± 0.2 and 1.2 ± 0.1 kg for normal, insufficiency and deficiency, respectively, p = 0.159. For waist change, the corresponding values were 3.3 ± 0.4, 3.3 ± 0.2 and 3.4 ± 0.2 cm, p = 0.792. For the 10-year follow-up, data from 2999 participants (45.8% women, mean age 50.8 ± 10.3 years) were used. No association was found for weight 2.3 ± 0.4, 2.3 ± 0.2 and 2.0 ± 0.2 kg, p = 0.588, or for waist 3.7 ± 0.4, 3.6 ± 0.3 and 4.2 ± 0.2 cm for normal, insufficiency and deficiency, respectively, p = 0.259. Conclusion: No association between vitamin D status and weight or waist gain at 5- and 10-year follow-up was found.
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Alizadeh T, Akhoundian M. An ultra-sensitive and highly selective impedimetric sensor for vitamin D measurement based on a novel imprinted polymer synthesized utilizing template-derived functional monomer. Anal Chim Acta 2022; 1223:340206. [DOI: 10.1016/j.aca.2022.340206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 07/09/2022] [Accepted: 07/25/2022] [Indexed: 11/01/2022]
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9
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Alexandridou A, Schorr P, Stokes CS, Volmer DA. Analysis of vitamin D metabolic markers by mass spectrometry: Recent progress regarding the "gold standard" method and integration into clinical practice. MASS SPECTROMETRY REVIEWS 2021. [PMID: 34967037 DOI: 10.1002/mas.21768] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/03/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
Liquid chromatography/tandem mass spectrometry is firmly established today as the gold standard technique for analysis of vitamin D, both for vitamin D status assessments as well as for measuring complex and intricate vitamin D metabolic fingerprints. While the actual mass spectrometry technology has seen only incremental performance increases in recent years, there have been major, very impactful changes in the front- and back-end of MS-based vitamin D assays; for example, the extension to new types of biological sample matrices analyzed for an increasing number of different vitamin D metabolites, novel sample preparation techniques, new powerful chemical derivatization reagents, as well the continued integration of high resolution mass spectrometers into clinical laboratories, replacing established triple-quadrupole instruments. At the same time, the sustainability of mass spectrometry operation in the vitamin D field is now firmly established through proven analytical harmonization and standardization programs. The present review summarizes the most important of these recent developments.
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Affiliation(s)
| | - Pascal Schorr
- Department of Bioanalytical Chemistry, Humboldt University Berlin, Berlin, Germany
| | - Caroline S Stokes
- Food and Health Research Group, Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbrücke, Germany
| | - Dietrich A Volmer
- Department of Bioanalytical Chemistry, Humboldt University Berlin, Berlin, Germany
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Thurow K, Fleischer H, Bach A. Automation der Bestimmung von Vitamin D in Serum und Plasma. BIOSPEKTRUM 2021; 27:660-662. [PMID: 34658540 PMCID: PMC8501362 DOI: 10.1007/s12268-021-1649-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bach A, Fleischer H, Wijayawardena B, Thurow K. Optimization of Automated Sample Preparation for Vitamin D Determination on a Biomek i7 Workstation. SLAS Technol 2021; 26:615-629. [PMID: 34282678 DOI: 10.1177/24726303211030291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Vitamin D belongs to the fat-soluble vitamins and is an integral part of bone metabolism. In the human body, a decreased vitamin D level can be an additional risk factor for diseases like cancer, diabetes, and mental diseases. As a result, an enormous increase in the demand for vitamin D testing has been observed in recent years, increasing the demand for powerful methods for vitamin D determination at the same time.Automation is the key factor in increasing sample throughput. This study compares three fully automated sample preparation methods for the determination of 25(OH)D2 and 25(OH)D3 in plasma and serum samples. Starting from a semiautomated reference method, the method is tested manually and subsequently fully automated on the Biomek i7 Workstation by integrating a centrifuge and a positive pressure extractor into the workstation. Alternatively, the centrifugation for the separation of protein aggregates and supernatant is replaced by a filter plate. Finally, the sample throughput is further increased by using phospholipid removal cartridges. The results show that phospholipid removal significantly increases the recovery rates in liquid chromatography-mass spectrometry. With the phospholipid removal cartridges, recovery rates of 97.36% for 25(OH)D2 and 102.5% for 25(OH)D3 were achieved, whereas with the automated classic automated preparation method, the recovery rates were 83.31% for 25(OH)D2 and 86.54% for 25(OH)D3. In addition to the technical evaluation, the different methods were also examined with regard to their economic efficiency. Finally, the qualitative and quantitative performance of the developed methods is benchmarked with a selected semiautomatic reference method.
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Affiliation(s)
- Anna Bach
- Center for Life Science Automation, University of Rostock, Rostock, Germany
| | - Heidi Fleischer
- Institute of Automation, University of Rostock, Rostock, Germany
| | | | - Kerstin Thurow
- Center for Life Science Automation, University of Rostock, Rostock, Germany
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Simultaneous determination of 24,25- and 25,26-dihydroxyvitamin D3 in serum samples with liquid-chromatography mass spectrometry - A useful tool for the assessment of vitamin D metabolism. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1158:122394. [PMID: 33091679 DOI: 10.1016/j.jchromb.2020.122394] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/06/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022]
Abstract
Vitamin D status is typically assessed by the measurement of 25-hydroxyvitamin D (25(OH)D). However, in selected patient groups the sole determination of 25(OH)D has been proven insufficient for this purpose. The simultaneous measurement of additional vitamin D metabolites may provide useful information for a better evaluation of the vitamin D status. Therefore, we developed and validated a liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the simultaneous determination of 25(OH)D3, 25(OH)D2, 24,25(OH)2D3 and additionally 25,26(OH)2D3, which was identified with a synthesized pure substance. Pure and deuterated substances were used to prepare calibrators and internal standards for all target metabolites. Pre-analytical sample preparation comprised protein precipitation followed by liquid-liquid-extraction and derivatization with 4-Phenyl-1,2,4-triazole-3,5-dione (PTAD) using 50 µL sample volume. Samples were analyzed on an Agilent HPLC 1260 system equipped with a silica-based Kinetex® 5 µm F5 100 Å core-shell column (150 × 4.6 mm) coupled to a Sciex 4500 mass spectrometer. For all four metabolites, limit of detection (LoD) and limit of quantification (LoQ) ranged from 0.3 to 1.5 nmol/L and 1.0 to 3.1 nmol/L, respectively. Recovery varied between 76.1 % and 84.3 %. Intra- and inter-assay imprecision were <8.6 % and <11.5 %, respectively. The analysis of external and internal quality control samples showed good accuracy for 25(OH)D3, 25(OH)D2, 24(R),25(OH)2D3 and 25,26(OH)2D3. Method comparison studies with human samples that were also analyzed with two other LC-MS/MS methods showed close agreement. Finally, the present method has been shown capable of identifying patients with 24-hydroxylase deficiency, which proves its clinical utility.
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Determination of Synthetic Cathinones in Urine and Oral Fluid by Liquid Chromatography High-Resolution Mass Spectrometry and Low-Resolution Mass Spectrometry: A Method Comparison. SEPARATIONS 2020. [DOI: 10.3390/separations7040053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Synthetic cathinones have become very popular recreational drugs. Therefore, determining them in biological samples is now a matter of concern. In recent years, different methods that have been developed can determine these drugs at low-concentration levels. In general, liquid chromatography mass spectrometry detection plays an important role in these methods and the trend is to use low-resolution and high-resolution mass spectrometry. In this article, for the first time, we compare these two analyzers using an Orbitrap and a triple quadrupole mass spectrometer in order to determine a group of synthetic cathinones in urine and oral fluid samples. For this comparison, we evaluated and compared different parameters: Method detection and quantification limits, linearity, apparent recoveries, matrix effect, repeatability (intra-day), reproducibility (inter-day), and accuracy. Similar results were obtained for the two analyzers for the apparent recoveries and matrix effect. However, triple quadrupole showed higher sensitivity compared to Orbitrap for both urine and oral fluid samples. The quantification limits in urine and the detection limits in saliva were two times lower for triple quadrupole. Finally, when blind samples were analyzed to study the accuracy, similar results were obtained for both analyzers.
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Fraser WD, Tang JCY, Dutton JJ, Schoenmakers I. Vitamin D Measurement, the Debates Continue, New Analytes Have Emerged, Developments Have Variable Outcomes. Calcif Tissue Int 2020; 106:3-13. [PMID: 31741016 DOI: 10.1007/s00223-019-00620-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/23/2019] [Indexed: 10/25/2022]
Abstract
The demand for measurement of vitamin D metabolites for clinical diagnosis and to advance our understanding of the role of vitamin D in human health has significantly increased in the last decade. New developments in technologies employed have enabled the separation and quantification of additional metabolites and interferences. Also, developments of immunoassays have changed the landscape. Programmes and materials for assay standardisation, harmonisation and the expansion of the vitamin D external quality assurance scheme (DEQAS) with the provision of target values as measured by a reference measurement procedure have improved standardisation, quality assurance and comparability of measurements. In this article, we describe developments in the measurement of the commonly analysed vitamin D metabolites in clinical and research practice. We describe current analytical approaches, discuss differences between assays, their origin, and how these may be influenced by physiological and experimental conditions. The value of measuring metabolites beyond 25 hydroxyvitamin D (25(OH)D), the marker of vitamin D status, in routine clinical practice is not yet confirmed. Here we provide an overview of the value and application of the measurement of 1,25 dihydroxyvitamin D, 24,25 dihydroxyvitamin D and free 25OHD in the diagnosis of patients with abnormalities in vitamin D metabolism and for research purposes.
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Affiliation(s)
- William D Fraser
- Norwich Medical School, University of East Anglia, Norwich Research Park, Floor 2, Bob Champion Research and Education Building, James Watson Road, Norwich, NR4 7UQ, UK.
- Departments of Diabetes, Endocrinology and Clinical Biochemistry, Norfolk and Norwich University Hospital NHS Foundation Trust, Colney Lane, Norwich, UK.
| | - Jonathan C Y Tang
- Norwich Medical School, University of East Anglia, Norwich Research Park, Floor 2, Bob Champion Research and Education Building, James Watson Road, Norwich, NR4 7UQ, UK
| | - John J Dutton
- Norwich Medical School, University of East Anglia, Norwich Research Park, Floor 2, Bob Champion Research and Education Building, James Watson Road, Norwich, NR4 7UQ, UK
| | - Inez Schoenmakers
- Norwich Medical School, University of East Anglia, Norwich Research Park, Floor 2, Bob Champion Research and Education Building, James Watson Road, Norwich, NR4 7UQ, UK
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Cavaliere C, Antonelli M, Capriotti AL, La Barbera G, Montone CM, Piovesana S, Laganà A. A Triple Quadrupole and a Hybrid Quadrupole Orbitrap Mass Spectrometer in Comparison for Polyphenol Quantitation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:4885-4896. [PMID: 30977362 DOI: 10.1021/acs.jafc.8b07163] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Liquid chromatography coupled to low-resolution mass spectrometry (LRMS) has historically been a popular approach for compound quantitation. Recently, high-resolution mass spectrometry (HRMS) technical developments led to the introduction of new approaches for quantitative analysis. Whereas the performances of HRMS have been largely assessed for qualitative purposes, there are still questions about its suitability for quantitative analysis. Several papers on LRMS and HRMS comparison have been published; however, none of them was applied to polyphenol quantitation. In this work, a comparison between HRMS, operated in data-dependent acquisition mode, and LRMS, operated in selected-reaction-monitoring mode, was performed for polyphenol quantitation in wine. The two techniques were evaluated in terms of sensitivity, linearity range, matrix effect, and precision, showing the better performances of HRMS. The suitability of HRMS for quantitation purposes as well as qualitative screening makes HRMS the new technique of choice for both targeted and untargeted analysis.
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Affiliation(s)
- Chiara Cavaliere
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Michela Antonelli
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Anna Laura Capriotti
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Giorgia La Barbera
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Carmela Maria Montone
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Susy Piovesana
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
| | - Aldo Laganà
- Department of Chemistry , University of Rome "La Sapienza" , Piazzale Aldo Moro 5 , Rome 00185 , Italy
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Teumer A, Gambaro G, Corre T, Bochud M, Vollenweider P, Guessous I, Kleber ME, Delgado GE, Pilz S, März W, Barnes CLK, Joshi PK, Wilson JF, de Borst MH, Navis G, van der Harst P, Heerspink HJL, Homuth G, Endlich K, Nauck M, Köttgen A, Pattaro C, Ferraro PM. Negative effect of vitamin D on kidney function: a Mendelian randomization study. Nephrol Dial Transplant 2018; 33:2139-2145. [PMID: 29718335 PMCID: PMC6275146 DOI: 10.1093/ndt/gfy074] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 02/23/2018] [Indexed: 01/08/2023] Open
Abstract
Background The kidney plays a central role in the regulation of vitamin D metabolism. It is not clear, however, whether vitamin D influences kidney function. Previous studies have reported conflicting results, which may have been influenced by reverse causation and residual confounding. We conducted a Mendelian randomization (MR) study to obtain unconfounded estimates of the association between genetically instrumented vitamin D metabolites and estimated glomerular filtration rate (eGFR) as well as the urinary albumin:creatinine ratio (UACR). Methods We performed a two-sample MR study based on three single nucleotide variants associated with 25(OH)D levels: rs2282679, rs10741657 and rs12785878, related to the genes GC, CYP2R1 and DHCR7, respectively. Estimates of the allele-dependent effects on serum 25(OH)D and eGFR/UACR were obtained from summary statistics of published genome-wide association meta-analyses. Additionally, we performed a one-sample MR analysis for both 25(OH)D and 1,25(OH)2 D using individual-level data from six cohorts. Results The combined MR estimate supported a negative causal effect of log transformed 25(OH)D on log transformed eGFR (β = -0.013, P = 0.003). The analysis of individual-level data confirmed the main findings and also revealed a significant association of 1,25(OH)2 D on eGFR (β = -0.094, P = 0.008). These results show that a 10% increase in serum 25(OH)D levels causes a 0.3% decrease in eGFR. There was no effect of 25(OH)D on UACR (β = 0.032, P = 0.265). Conclusion Our study suggests that circulating vitamin D metabolite levels are negatively associated with eGFR. Further studies are needed to elucidate the underlying mechanisms.
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Affiliation(s)
- Alexander Teumer
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Center for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Giovanni Gambaro
- Divisione di Nefrologia, Fondazione Policlinico Universitario A. Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Tanguy Corre
- Institute of Social and Preventive Medicine, Lausanne, Switzerland
- Department of computational biology, University of Lausanne, Lausanne, Switzerland
| | - Murielle Bochud
- Institute of Social and Preventive Medicine, Lausanne, Switzerland
| | | | - Idris Guessous
- Division of Primary Care Medicine, University Hospital of Geneva, Geneva, Switzerland
| | - Marcus E Kleber
- Vth Department of Medicine (Nephrology, Hypertensiology, Endocrinology, Diabetology, Rheumatology), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Graciela E Delgado
- Vth Department of Medicine (Nephrology, Hypertensiology, Endocrinology, Diabetology, Rheumatology), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Stefan Pilz
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
| | - Winfried März
- Synlab Academy, Synlab Holding Deutschland GmbH, Mannheim, Germany
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University Graz, Graz, Austria
| | - Catriona L K Barnes
- Centre for Global Health Research, Usher Institute for Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, Scotland
| | - Peter K Joshi
- Centre for Global Health Research, Usher Institute for Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, Scotland
| | - James F Wilson
- Centre for Global Health Research, Usher Institute for Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, Scotland
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, Scotland
| | - Martin H de Borst
- Department of Internal Medicine, Division of Nephrology, Groningen, The Netherlands
| | - Gerjan Navis
- Department of Internal Medicine, Division of Nephrology, Groningen, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Hiddo J L Heerspink
- Department of Clinical Pharmacy and Pharmacology, Groningen, The Netherlands
| | - Georg Homuth
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Karlhans Endlich
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Matthias Nauck
- DZHK (German Center for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Anna Köttgen
- Institute of Genetic Epidemiology, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | | | - Pietro Manuel Ferraro
- Divisione di Nefrologia, Fondazione Policlinico Universitario A. Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
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Keyfi F, Nahid S, Mokhtariye A, Nayerabadi S, Alaei A, Varasteh AR. Evaluation of 25-OH vitamin D by high performance liquid chromatography: validation and comparison with electrochemiluminescence. J Anal Sci Technol 2018. [DOI: 10.1186/s40543-018-0155-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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18
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Anbarcioglu E, Kirtiloglu T, Öztürk A, Kolbakir F, Acıkgöz G, Colak R. Vitamin D deficiency in patients with aggressive periodontitis. Oral Dis 2018; 25:242-249. [PMID: 30169905 DOI: 10.1111/odi.12968] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/07/2018] [Accepted: 08/26/2018] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Vitamin D deficiency is a frequent health problem worldwide, especially as fewer people spend much time in the sun. Vitamin D deficiency is linked to several infectious and inflammatory conditions, including periodontal disease. However, its role in aggressive periodontitis (AgP) has not been well studied. We evaluated the association between vitamin D concentration and periodontal disease, both AgP and chronic (CP) periodontitis. METHOD AND MATERIALS Forty-seven AgP 55 CP and 27 control subjects participated. All patients were tested for serum vitamin D concentration (25(OH)D), parathyroid hormone, and serum bone-related biomarkers (alkaline phosphatases, calcium, and phosphorus) regulated by vitamin D. RESULTS The patients with AgP had lower serum 25(OH)D concentration (11.22 ± 4.8 ng/ml) than controls (16.9 ± 6.4 ng/ml) and patients with CP (16.13 ± 8.3 ng/ml; overall p value 0.0002). These associations remained significant after adjustment for age and gender (p = 0.002). No significant differences were observed in any bone-related biomarker among the three groups, and no association was observed with periodontal disease indices. CONCLUSIONS Our results suggest that vitamin D deficiency may be a potential risk factor for AgP. Given the high prevalence of vitamin D deficiency in AgP patients, routine screening for vitamin D status may be advisable in these subjects.
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Affiliation(s)
- Emrah Anbarcioglu
- Department of Periodontology, School of Dental Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Tugrul Kirtiloglu
- Department of Periodontology, School of Dental Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Ayla Öztürk
- Department of Periodontology, School of Dental Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Filiz Kolbakir
- Department of Periodontology, School of Dental Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Gökhan Acıkgöz
- Department of Periodontology, School of Dental Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Ramis Colak
- Department of Endocrinology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
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Rochat B. Proposed Confidence Scale and ID Score in the Identification of Known-Unknown Compounds Using High Resolution MS Data. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:709-723. [PMID: 28116700 DOI: 10.1007/s13361-016-1556-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 11/07/2016] [Accepted: 11/11/2016] [Indexed: 05/25/2023]
Abstract
High-resolution (HR) MS instruments recording HR-full scan allow analysts to go further beyond pre-acquisition choices. Untargeted acquisition can reveal unexpected compounds or concentrations and can be performed for preliminary diagnosis attempt. Then, revealed compounds will have to be identified for interpretations. Whereas the need of reference standards is mandatory to confirm identification, the diverse information collected from HRMS allows identifying unknown compounds with relatively high degree of confidence without reference standards injected in the same analytical sequence. However, there is a necessity to evaluate the degree of confidence in putative identifications, possibly before further targeted analyses. This is why a confidence scale and a score in the identification of (non-peptidic) known-unknown, defined as compounds with entries in database, is proposed for (LC-) HRMS data. The scale is based on two representative documents edited by the European Commission (2007/657/EC) and the Metabolomics Standard Initiative (MSI), in an attempt to build a bridge between the communities of metabolomics and screening labs. With this confidence scale, an identification (ID) score is determined as [a number, a letter, and a number] (e.g., 2D3), from the following three criteria: I, a General Identification Category (1, confirmed, 2, putatively identified, 3, annotated compounds/classes, and 4, unknown); II, a Chromatography Class based on the relative retention time (from the narrowest tolerance, A, to no chromatographic references, D); and III, an Identification Point Level (1, very high, 2, high, and 3, normal level) based on the number of identification points collected. Three putative identification examples of known-unknown will be presented. Graphical Abstract ᅟ.
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Affiliation(s)
- Bertrand Rochat
- Centre Hospitalier Universitaire Vaudois (CHUV), University Hospital of Lausanne, 1011, Lausanne, Switzerland.
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20
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Sugimoto H, Iguchi M, Jinno F. Bioanalysis of farnesyl pyrophosphate in human plasma by high-performance liquid chromatography coupled to triple quadrupole tandem mass spectrometry and hybrid quadrupole Orbitrap high-resolution mass spectrometry. Anal Bioanal Chem 2017; 409:3551-3560. [PMID: 28343347 DOI: 10.1007/s00216-017-0293-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 02/09/2017] [Accepted: 03/02/2017] [Indexed: 01/18/2023]
Abstract
The isoprenoids farnesyl pyrophosphate (FPP) and geranylgeranyl pyrophosphate (GGPP) are pivotal intermediates for cholesterol homeostasis and cell signaling in the mevalonate pathway. We developed a sensitive and selective high-performance liquid chromatography tandem triple quadrupole mass spectrometry (LC-QQQ-MS) method for FPP in human plasma without the need for a derivatization process. We optimized the sample preparation procedure to extract FPP and 13C5-FPP (as internal standard) from sample fluids using methanol. Phosphate-buffered saline was used as the surrogate matrix for the preparation of calibration curves and quality control samples. Using an XBridge C18 column (3.5 μm, 2.1 × 100-mm ID) with gradient elution composed of 10 mmol/L ammonium carbonate/ammonium hydroxide (1000:5, v/v) and acetonitrile/ammonium hydroxide (1000:5, v/v) provided the sharp peaks of FPP and 13C5-FPP in human plasma. The calibration curve ranged from 0.2 to 20 ng/mL in human plasma with acceptable intra-day and inter-day precision and accuracy. The sensitivity of this bioanalytical method was sufficient for clinical analysis. The endogenous FPP plasma concentrations in 40 human healthy volunteers ascertained by LC-QQQ-MS and high-performance liquid chromatography tandem hybrid quadrupole Orbitrap high-resolution mass spectrometry (LC-Q-Orbi-MS) were comparable. Furthermore, the endogenous GGPP in human plasma was selectively detected for the first time by LC-Q-Orbi-MS. In conclusion, a sensitive bioanalytical method for FPP in human plasma by means of LC-QQQ-MS and LC-Q-Orbi-MS was developed in this study. Taking into account the versatility of LC-Q-Orbi-MS, the simultaneous detection of FPP and GGPP may be feasible in clinical practice.
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Affiliation(s)
- Hiroshi Sugimoto
- Drug Metabolism and Pharmacokinetics Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan.
| | - Mie Iguchi
- Drug Metabolism and Pharmacokinetics Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan
| | - Fumihiro Jinno
- Drug Metabolism and Pharmacokinetics Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan
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21
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Bruns K, Mönnikes R, Lackner KJ. Quantitative determination of four immunosuppressants by high resolution mass spectrometry (HRMS). Clin Chem Lab Med 2017; 54:1193-200. [PMID: 26641969 DOI: 10.1515/cclm-2015-0863] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/28/2015] [Indexed: 11/15/2022]
Abstract
BACKGROUND Liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) utilizing triple-quadrupole instruments has been widely used for quantification of endogenous compounds, drugs or metabolites in clinical laboratories. In contrast, high-resolution mass spectrometry (HRMS) is typically used for compound identification due to its limited dynamic range. Recently HRMS instruments with enhanced linear dynamic range have become available. The aim of this study was to evaluate HRMS for fast quantitative applications in a clinical laboratory. METHODS A high throughput UPLC-TOF-MS assay for simultaneous quantification of cyclosporin A, tacrolimus, sirolimus and everolimus was developed. All immunosuppressants were analyzed as sodium adducts in TOF-only mode using an Agilent 6540 Q-TOF system. Extracted ion chromatograms of analytes and internal standards were created from full-scan data. The assay was evaluated and compared to an established LC-MS/MS assay according to CLSI recommendations. RESULTS The novel HRMS assay has a total run time of 3 min. The assay is linear in a clinical relevant concentration range for all four immunosupressants. Method correlations vs. established LC-MS/MS assay were between R2=0.99 and R2=0.97. Total coefficients of variation (CVT) ranges were 4.5%-6.4% (tacrolimus), 7.4%-8.0% (sirolimus), 8.0%-8.8% (everolimus) and 6.1%-7.4% (cyclosporine A) for three relevant concentration levels each. CONCLUSIONS High resolution TOF-MS and LC-MS/MS show equivalent quantitative performance for monitoring of cyclosporin A, tacrolimus, sirolimus and everolimus. HRMS has the potential to replace conventional LC-MS/MS in clinical laboratories because it simplifies assay development (no optimization of fragmentations and product ions necessary) and its full-scan data can provide additional information.
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On-line SPE sample treatment as a tool for method automatization and detection limits reduction: Quantification of 25-hydroxyvitamin D3/D2. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1043:219-227. [DOI: 10.1016/j.jchromb.2016.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 08/23/2016] [Accepted: 10/07/2016] [Indexed: 11/17/2022]
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23
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Frey AJ, Wang Q, Busch C, Feldman D, Bottalico L, Mesaros CA, Blair IA, Vachani A, Snyder NW. Validation of highly sensitive simultaneous targeted and untargeted analysis of keto-steroids by Girard P derivatization and stable isotope dilution-liquid chromatography-high resolution mass spectrometry. Steroids 2016; 116:60-66. [PMID: 27743906 PMCID: PMC5127713 DOI: 10.1016/j.steroids.2016.10.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 10/03/2016] [Accepted: 10/04/2016] [Indexed: 10/20/2022]
Abstract
A multiplexed quantitative method for the analysis of three major unconjugated steroids in human serum by stable isotope dilution liquid chromatography-high resolution mass spectrometry (LC-HRMS) was developed and validated on a Q Exactive Plus hybrid quadrupole/Orbitrap mass spectrometer. This quantification utilized isotope dilution and Girard P derivatization on the keto-groups of testosterone (T), androstenedione (AD) and dehydroepiandrosterone (DHEA) to improve ionization efficiency using electrospray ionization. Major isomeric compounds to T and DHEA; the inactive epimer of testosterone (epiT), and the metabolite of AD, 5α-androstanedione (5α-AD) were completely resolved on a biphenyl column within an 18min method. Inter- and intra-day method validation using LC-HRMS with qualifying product ions was performed and acceptable analytical performance was achieved. The method was further validated by comparing steroid levels from 100μL of serum from young vs older subjects. Since this approach provides high-dimensional HRMS data, untargeted analysis by age group was performed. DHEA and T were detected among the top analytes most significantly different across the two groups after untargeted LC-HRMS analysis, as well as a number of other still unknown metabolites, indicating the potential for combined targeted/untargeted analysis in steroid analysis.
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Affiliation(s)
| | - Qingqing Wang
- Penn SRP Center and Center of Excellence in Environmental Toxicology, Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, USA.
| | - Christine Busch
- Penn SRP Center and Center of Excellence in Environmental Toxicology, Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, USA.
| | | | - Lisa Bottalico
- Penn SRP Center and Center of Excellence in Environmental Toxicology, Department of Pharmacology, University of Pennsylvania, USA.
| | - Clementina A Mesaros
- Penn SRP Center and Center of Excellence in Environmental Toxicology, Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, USA.
| | - Ian A Blair
- Penn SRP Center and Center of Excellence in Environmental Toxicology, Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, USA.
| | - Anil Vachani
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, USA.
| | - Nathaniel W Snyder
- A.J. Drexel Autism Institute, Drexel University, Center of Excellence in Environmental Toxicology, University of Pennsylvania, USA.
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Rochat B. From targeted quantification to untargeted metabolomics: Why LC-high-resolution-MS will become a key instrument in clinical labs. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.02.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Geib T, Sleno L, Hall RA, Stokes CS, Volmer DA. Triple Quadrupole Versus High Resolution Quadrupole-Time-of-Flight Mass Spectrometry for Quantitative LC-MS/MS Analysis of 25-Hydroxyvitamin D in Human Serum. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:1404-1410. [PMID: 27154021 DOI: 10.1007/s13361-016-1412-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/15/2016] [Accepted: 04/16/2016] [Indexed: 06/05/2023]
Abstract
We describe a systematic comparison of high and low resolution LC-MS/MS assays for quantification of 25-hydroxyvitamin D3 in human serum. Identical sample preparation, chromatography separations, electrospray ionization sources, precursor ion selection, and ion activation were used; the two assays differed only in the implemented final mass analyzer stage; viz. high resolution quadrupole-quadrupole-time-of-flight (QqTOF) versus low resolution triple quadrupole instruments. The results were assessed against measured concentration levels from a routine clinical chemiluminescence immunoassay. Isobaric interferences prevented the simple use of TOF-MS spectra for extraction of accurate masses and necessitated the application of collision-induced dissociation on the QqTOF platform. The two mass spectrometry assays provided very similar analytical figures of merit, reflecting the lack of relevant isobaric interferences in the MS/MS domain, and were successfully applied to determine the levels of 25-hydroxyvitamin D for patients with chronic liver disease. Graphical Abstract ᅟ.
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Affiliation(s)
- Timon Geib
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
| | - Lekha Sleno
- Department of Chemistry, Université du Québec à Montréal, Montréal, Québec, Canada
| | - Rabea A Hall
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Caroline S Stokes
- Department of Medicine II, Saarland University Medical Center, Homburg, Germany
| | - Dietrich A Volmer
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany.
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HRMS using a Q-Exactive series mass spectrometer for regulated quantitative bioanalysis: how, when, and why to implement. Bioanalysis 2016; 8:1709-21. [DOI: 10.4155/bio-2016-0079] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
High-resolution MS (HRMS) has seen an uptake in use for discovery qual/quan workflows, however, its utilization in late discovery/development has been slow. Past reports comparing HRMS to triple quadrupole (QQQ) instrumentation to date have indicated that HRMS instruments are capable of producing data acceptable for regulated bioanalysis, however lack the sensitivity required for sub ng/ml LLOQ assays. Recent advances in HRMS instrumentation have closed the sensitivity gap with QQQ and have even provided improved selectivity and sensitivity over QQQ SRM assays. Herein, the authors will describe how, when, and why HRMS (specifically Q-Exactive series mass spectrometers) should be considered for implementation in regulated quantitative bioanalysis assays.
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Zhao XY, Li J, Wang JH, Habib S, Wei W, Sun SJ, Strobel HW, Jia JD. Vitamin D serum level is associated with Child-Pugh score and metabolic enzyme imbalances, but not viral load in chronic hepatitis B patients. Medicine (Baltimore) 2016; 95:e3926. [PMID: 27399065 PMCID: PMC5058794 DOI: 10.1097/md.0000000000003926] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Vitamin D deficiency is common in patients with chronic liver diseases. However, vitamin D status in persons with chronic hepatitis B virus (HBV) infection is not consistently reported. Specifically, the impact of liver dysfunction on vitamin D status has not been well addressed.We recruited a group of patients (n = 345) with chronic hepatitis B (n = 115), hepatitis B related cirrhosis (n = 115), and age- and gender-matched healthy controls (n = 115). Serum 25-hydroxyvitamin D3 [25(OH)D3], its related metabolic enzymes, intact parathyroid hormone were measured. Calcium, magnesium, and phosphorus were obtained from medical record.Serum 25(OH)D3 levels in chronic hepatitis B patients (7.83 ± 3.47 ng/mL) were significantly lower than that in healthy controls (9.76 ± 4.36 ng/mL, P < 0.001), but significantly higher than that in hepatitis B-related cirrhotic patients (5.21 ± 3.67 ng/mL, P < 0.001). Furthermore, 25(OH)D3 decreased stepwise with higher Child-Pugh classification. However, there were no significant differences in 25(OH)D3 levels between (1) hepatitis B e antigen (HBeAg +) and HBeAg(-) persons, or (2) among persons with different HBV viral load, or (3) between treatment naïve and patients on antiviral therapy. Multiple logistic regression analyses confirmed that higher Child-Pugh score was independently associated with 25(OH)D3 deficiency (<10 ng/mL) with an odds ratio of 1.20 (confidence interval 1.03-1.39, P = 0.016). Levels of cytochrome P450 (CYP) 27A1 were significantly decreased, whereas levels of CYP24A1 were significantly elevated in cirrhotic patients.These results suggest that decreasing vitamin D levels are likely to be a result, rather than a cause, of liver dysfunction and irrespective of HBV viral load. Reduction in 25(OH)D3 levels is possibly due to downregulation of the synthetic hydroxylase CYP27A1 and concurrent upregulation of degrading CYP24A1 in patients with liver cirrhosis.
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Affiliation(s)
- Xin-yan Zhao
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory on Translational Medicine on Cirrhosis, National Clinical Research Center for Digestive Diseases, Beijing
| | - Jia Li
- Tianjin Institute of Hepatology, Tianjin Second People's Hospital, Tianjin
| | - Jing-han Wang
- Clinical Laboratory, the Second Hospital of Dalian Medical University, Dalian, Liaoning
| | - Sohail Habib
- International School, Capital Medical University, Beijing, People's Republic of China
| | - Wei Wei
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory on Translational Medicine on Cirrhosis, National Clinical Research Center for Digestive Diseases, Beijing
| | - Shu-jie Sun
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory on Translational Medicine on Cirrhosis, National Clinical Research Center for Digestive Diseases, Beijing
| | - Henry W. Strobel
- Department of Biochemistry & Molecular Biology, University of Texas Medical School, Houston, TX
| | - Ji-dong Jia
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory on Translational Medicine on Cirrhosis, National Clinical Research Center for Digestive Diseases, Beijing
- Correspondence: Ji-dong Jia, Liver Research Center, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong-An Road, Xicheng District, Beijing 100050, People's Republic of China (e-mail: )
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Quantitative performance of a quadrupole-orbitrap-MS in targeted LC–MS determinations of small molecules. J Pharm Biomed Anal 2016; 124:48-56. [DOI: 10.1016/j.jpba.2016.02.025] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 02/15/2016] [Accepted: 02/17/2016] [Indexed: 11/23/2022]
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30
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Glauser G, Grund B, Gassner AL, Menin L, Henry H, Bromirski M, Schütz F, McMullen J, Rochat B. Validation of the Mass-Extraction-Window for Quantitative Methods Using Liquid Chromatography High Resolution Mass Spectrometry. Anal Chem 2016; 88:3264-71. [DOI: 10.1021/acs.analchem.5b04689] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Gaétan Glauser
- Neuchâtel
Platform of Analytical Chemistry, Institut de Chimie, Université de Neuchâtel, Neuchâtel, Switzerland
| | - Baptiste Grund
- Quantitative
Mass Spectrometry Facility, University Hospital of Lausanne, CHUV, 1011 Lausanne, Switzerland
| | - Anne-Laure Gassner
- Institut
de Police Scientifique, University of Lausanne, Batochime, 1015 Lausanne, Switzerland
| | - Laure Menin
- EPFL, Institut
of Chemical Sciences and Engineering, Batochime, 1015 Lausanne, Switzerland
| | - Hugues Henry
- BioID,
Department of Laboratories, University Hospital of Lausanne, CHUV, 1011 Lausanne, Switzerland
| | | | - Frédéric Schütz
- Swiss Institute
of Bioinformatics, Génopode, University of Lausanne, 1015 Lausanne, Switzerland
| | - Justin McMullen
- Quantitative
Mass Spectrometry Facility, University Hospital of Lausanne, CHUV, 1011 Lausanne, Switzerland
| | - Bertrand Rochat
- Quantitative
Mass Spectrometry Facility, University Hospital of Lausanne, CHUV, 1011 Lausanne, Switzerland
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31
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Ladumor M, Tiwari S, Patil A, Bhavsar K, Jhajra S, Prasad B, Singh S. High-Resolution Mass Spectrometry in Metabolite Identification. APPLICATIONS OF TIME-OF-FLIGHT AND ORBITRAP MASS SPECTROMETRY IN ENVIRONMENTAL, FOOD, DOPING, AND FORENSIC ANALYSIS 2016. [DOI: 10.1016/bs.coac.2016.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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A review of chromatographic methods for the determination of water- and fat-soluble vitamins in biological fluids. J Sep Sci 2016. [DOI: 10.05310.1002/jssc.201501038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Cajka T, Fiehn O. Toward Merging Untargeted and Targeted Methods in Mass Spectrometry-Based Metabolomics and Lipidomics. Anal Chem 2015; 88:524-45. [PMID: 26637011 DOI: 10.1021/acs.analchem.5b04491] [Citation(s) in RCA: 533] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Tomas Cajka
- UC Davis Genome Center-Metabolomics, University of California Davis , 451 Health Sciences Drive, Davis, California 95616, United States
| | - Oliver Fiehn
- UC Davis Genome Center-Metabolomics, University of California Davis , 451 Health Sciences Drive, Davis, California 95616, United States.,King Abdulaziz University , Faculty of Science, Biochemistry Department, P.O. Box 80203, Jeddah 21589, Saudi Arabia
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34
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de la Fuente AG, Errea O, van Wijngaarden P, Gonzalez GA, Kerninon C, Jarjour AA, Lewis HJ, Jones CA, Nait-Oumesmar B, Zhao C, Huang JK, ffrench-Constant C, Franklin RJM. Vitamin D receptor-retinoid X receptor heterodimer signaling regulates oligodendrocyte progenitor cell differentiation. J Cell Biol 2015; 211:975-85. [PMID: 26644513 PMCID: PMC4674280 DOI: 10.1083/jcb.201505119] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 10/27/2015] [Indexed: 02/03/2023] Open
Abstract
The mechanisms regulating differentiation of oligodendrocyte (OLG) progenitor cells (OPCs) into mature OLGs are key to understanding myelination and remyelination. Signaling via the retinoid X receptor γ (RXR-γ) has been shown to be a positive regulator of OPC differentiation. However, the nuclear receptor (NR) binding partner of RXR-γ has not been established. In this study we show that RXR-γ binds to several NRs in OPCs and OLGs, one of which is vitamin D receptor (VDR). Using pharmacological and knockdown approaches we show that RXR-VDR signaling induces OPC differentiation and that VDR agonist vitamin D enhances OPC differentiation. We also show expression of VDR in OLG lineage cells in multiple sclerosis. Our data reveal a role for vitamin D in the regenerative component of demyelinating disease and identify a new target for remyelination medicines.
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Affiliation(s)
- Alerie Guzman de la Fuente
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK
| | - Oihana Errea
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK
| | - Peter van Wijngaarden
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK Centre for Eye Research, University of Melbourne, Royal Victorian Eye and Ear Hospital, Victoria 3002, Australia
| | - Ginez A Gonzalez
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK
| | - Christophe Kerninon
- Institut du Cerveau et de la Moelle Epinière, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1127, 75651 Paris, France
| | - Andrew A Jarjour
- Medical Research Council Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, Scotland, UK
| | | | | | - Brahim Nait-Oumesmar
- Institut du Cerveau et de la Moelle Epinière, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1127, 75651 Paris, France
| | - Chao Zhao
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK
| | - Jeffrey K Huang
- Department of Biology, Georgetown University, Washington, DC 20057
| | - Charles ffrench-Constant
- Medical Research Council Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, Scotland, UK
| | - Robin J M Franklin
- Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AH, England, UK
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35
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Karaźniewicz-Łada M, Główka A. A review of chromatographic methods for the determination of water- and fat-soluble vitamins in biological fluids. J Sep Sci 2015; 39:132-48. [DOI: 10.1002/jssc.201501038] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Marta Karaźniewicz-Łada
- Department of Physical Pharmacy and Pharmacokinetics; Poznan University of Medical Sciences; Poznań Poland
| | - Anna Główka
- Department of Bromatology; Poznan University of Medical Sciences; Poznań Poland
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36
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Glendenning P, Inderjeeth CA. Controversy and consensus regarding vitamin D: Recent methodological changes and the risks and benefits of vitamin D supplementation. Crit Rev Clin Lab Sci 2015; 53:13-28. [DOI: 10.3109/10408363.2015.1074157] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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37
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Marques-Vidal P, Vollenweider P, Guessous I, Henry H, Boulat O, Waeber G, Jornayvaz FR. Serum Vitamin D Concentrations Are Not Associated with Insulin Resistance in Swiss Adults. J Nutr 2015; 145:2117-22. [PMID: 26180247 DOI: 10.3945/jn.115.211763] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 06/25/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Low vitamin D status has been associated with an increased risk of developing type 2 diabetes and insulin resistance (IR), although this has been recently questioned. OBJECTIVE We examined the association between serum vitamin D metabolites and incident IR. METHODS This was a prospective, population-based study derived from the CoLaus (Cohorte Lausannoise) study including 3856 participants (aged 51.2 ± 10.4 y; 2217 women) free from diabetes or IR at baseline. IR was defined as a homeostasis model assessment (HOMA) index >2.6. Fasting plasma insulin and glucose were measured at baseline and at follow-up to calculate the HOMA index. The association of vitamin D metabolites with incident IR was analyzed by logistic regression, and the results were expressed for each independent variable as ORs and 95% CIs. RESULTS During the 5.5-y follow-up, 649 (16.9%) incident cases of IR were identified. Participants who developed IR had lower baseline serum concentrations of 25-hydroxyvitamin D3 [25(OH)D3 (25-hydroxycholecalciferol); 45.9 ± 22.8 vs. 49.9 ± 22.6 nmol/L; P < 0.001], total 25(OH)D3 (25(OH)D3 + epi-25-hydroxyvitamin D3 [3-epi-25(OH)D3]; 49.1 ± 24.3 vs. 53.3 ± 24.1 nmol/L; P < 0.001), and 3-epi-25(OH)D3 (4.2 ± 2.9 vs. 4.3 ± 2.5 nmol/L; P = 0.01) but a higher 3-epi- to total 25(OH)D3 ratio (0.09 ± 0.05 vs. 0.08 ± 0.04; P = 0.007). Multivariable analysis adjusting for month of sampling, age, and sex showed an inverse association between 25(OH)D3 and the likelihood of developing IR [ORs (95% CIs): 0.86 (0.68, 1.09), 0.60 (0.46, 0.78), and 0.57 (0.43, 0.75) for the second, third, and fourth quartiles compared with the first 25(OH)D3 quartile; P-trend < 0.001]. Similar associations were found between total 25(OH)D3 and incident IR. There was no significant association between 3-epi-25(OH)D3 and IR, yet a positive association was observed between the 3-epi- to total 25(OH)D3 ratio and incident IR. Further adjustment for body mass index, sedentary status, and smoking attenuated the association between 25(OH)D3, total 25(OH)D3, and the 3-epi- to total 25(OH)D3 ratio and the likelihood of developing IR. CONCLUSION In the CoLaus study in healthy adults, the risk of incident IR is not associated with serum concentrations of 25(OH)D3 and total 25(OH)D3.
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Affiliation(s)
| | | | - Idris Guessous
- Institute of Social and Preventive Medicine (IUMSP), Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine, Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland; and Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA
| | | | | | | | - François R Jornayvaz
- Service of Endocrinology, Diabetes, and Metabolism, Lausanne University Hospital, Lausanne, Switzerland;
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A Population-Based Model to Consider the Effect of Seasonal Variation on Serum 25(OH)D and Vitamin D Status. BIOMED RESEARCH INTERNATIONAL 2015; 2015:168189. [PMID: 26421279 PMCID: PMC4569755 DOI: 10.1155/2015/168189] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 08/16/2015] [Indexed: 12/19/2022]
Abstract
Background. We elaborated a model that predicts the centiles of the 25(OH)D distribution taking into account seasonal variation. Methods. Data from two Swiss population-based studies were used to generate (CoLaus) and validate (Bus Santé) the model. Serum 25(OH)D was measured by ultra high pressure LC-MS/MS and immunoassay. Linear regression models on square-root transformed 25(OH)D values were used to predict centiles of the 25(OH)D distribution. Distribution functions of the observations from the replication set predicted with the model were inspected to assess replication. Results. Overall, 4,912 and 2,537 Caucasians were included in original and replication sets, respectively. Mean (SD) 25(OH)D, age, BMI, and % of men were 47.5 (22.1) nmol/L, 49.8 (8.5) years, 25.6 (4.1) kg/m2, and 49.3% in the original study. The best model included gender, BMI, and sin-cos functions of measurement day. Sex- and BMI-specific 25(OH)D centile curves as a function of measurement date were generated. The model estimates any centile of the 25(OH)D distribution for given values of sex, BMI, and date and the quantile corresponding to a 25(OH)D measurement. Conclusions. We generated and validated centile curves of 25(OH)D in the general adult Caucasian population. These curves can help rank vitamin D centile independently of when 25(OH)D is measured.
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Patel PN, Kalariya PD, Swamy CV, Gananadhamu S, Srinivas R. Quantitation of acotiamide in rat plasma by UHPLC-Q-TOF-MS: method development, validation and application to pharmacokinetics. Biomed Chromatogr 2015; 30:363-8. [DOI: 10.1002/bmc.3555] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 06/19/2015] [Accepted: 07/02/2015] [Indexed: 01/11/2023]
Affiliation(s)
- Prinesh N. Patel
- Department of Pharmaceutical Analysis; National Institute of Pharmaceutical Education and Research; Balanagar Hyderabad 500037 Telangana India
| | - Pradipbhai D. Kalariya
- Department of Pharmaceutical Analysis; National Institute of Pharmaceutical Education and Research; Balanagar Hyderabad 500037 Telangana India
| | - Challa Veerabhadra Swamy
- Department of Pharmacology; National Institute of Pharmaceutical Education and Research; Balanagar Hyderabad 500037 Telangana India
| | - S. Gananadhamu
- Department of Pharmaceutical Analysis; National Institute of Pharmaceutical Education and Research; Balanagar Hyderabad 500037 Telangana India
| | - R. Srinivas
- Department of Pharmaceutical Analysis; National Institute of Pharmaceutical Education and Research; Balanagar Hyderabad 500037 Telangana India
- National Centre for Mass Spectrometry; CSIR - Indian Institute of Chemical Technology; Hyderabad 500 007 Telangana India
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40
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Müller MJ, Volmer DA. Mass spectrometric profiling of vitamin D metabolites beyond 25-hydroxyvitamin D. Clin Chem 2015; 61:1033-48. [PMID: 26130585 DOI: 10.1373/clinchem.2015.241430] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 05/19/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND The frequency of measurements of vitamin D in the human population has significantly increased over the last decade because vitamin D has now been linked to many diseases, in addition to its established role in bone health. Usually, serum 25-hydroxyvitamin D concentrations are measured to assess the vitamin D status of individuals. Unfortunately, many studies investigating links between vitamin D and disease also use only this single metabolite. Intricate correlations with other vitamin D metabolites or dynamic effects of downstream metabolites may therefore be overlooked. Fortunately, powerful LC-MS/MS approaches have recently become available that can simultaneously quantify the concentrations of multiple vitamin D metabolites. These approaches are challenging, however, because of inherent instrumental problems with detection of vitamin D compounds and the low concentrations of the metabolites in biological fluids. CONTENT This review summarizes recent mass spectrometry assays for the quantitative measurement of multiple vitamin D metabolites and their application in clinical research, with a particular focus on the low-abundance downstream metabolic species generated after the initial hydroxylation to 25-hydroxyvitamin D. SUMMARY To study the pathobiological effects and function of vitamin D metabolites in disease, in particular in low-abundance species beyond 25-hydroxyvitamin D, we need to know their concentrations. Although detection of these vitamin D species is challenging, a number of recent mass spectrometry assays have successfully demonstrated that LC-MS/MS methods can quantify multiple vitamin D compounds over a wide dynamic range individually or as part of multimetabolite assays.
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Affiliation(s)
- Miriam J Müller
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
| | - Dietrich A Volmer
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany.
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Guessous I. Role of Vitamin D deficiency in extraskeletal complications: predictor of health outcome or marker of health status? BIOMED RESEARCH INTERNATIONAL 2015; 2015:563403. [PMID: 26075246 PMCID: PMC4436443 DOI: 10.1155/2015/563403] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/09/2015] [Indexed: 12/31/2022]
Abstract
The relationship of vitamin D with extraskeletal complications, such as cardiovascular disease, cancer, and autoimmune disease, is of major interest considering its roles in key biological processes and the worldwide high prevalence of vitamin D deficiency. However, the causal relationships between vitamin D and most extraskeletal complications are weak. Currently, a heated debate over vitamin D is being conducted according to two hypotheses. In this review, we first present the different arguments that suggest a major role of vitamin D in a very broad type of extraskeletal complications (hypothesis #1). We then present results from recent meta-analyses of randomized controlled trials indicating a lack of association of vitamin D with major extraskeletal complications (hypothesis #2). We discuss different issues (e.g., causality, confounding, reverse causation, misclassification, and Mendelian randomization) that contribute to the favoring of one hypothesis over the other. While ultimately only one hypothesis is correct, we anticipate that the results from the ongoing randomized controlled trials will be unlikely to reconcile the divided experts.
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Affiliation(s)
- Idris Guessous
- Unit of Population Epidemiology, Department of Community Medicine and Primary Care and Emergency Medicine, Geneva University Hospitals, 1214 Geneva, Switzerland
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, 1010 Lausanne, Switzerland
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA 1518, USA
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Guessous I, McClellan W, Kleinbaum D, Vaccarino V, Hugues H, Boulat O, Marques-Vidal P, Paccaud F, Theler JM, Gaspoz JM, Burnier M, Waeber G, Vollenweider P, Bochud M. Serum 25-hydroxyvitamin D level and kidney function decline in a Swiss general adult population. Clin J Am Soc Nephrol 2015; 10:1162-9. [PMID: 25901090 DOI: 10.2215/cjn.04960514] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 03/02/2015] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND OBJECTIVES Molecular evidence suggests that levels of vitamin D are associated with kidney function loss. Still, population-based studies are limited and few have considered the potential confounding effect of baseline kidney function. This study evaluated the association of serum 25-hydroxyvitamin D with change in eGFR, rapid eGFR decline, and incidence of CKD and albuminuria. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Baseline (2003-2006) and 5.5-year follow-up data from a Swiss adult general population were used to evaluate the association of serum 25-hydroxyvitamin D with change in eGFR, rapid eGFR decline (annual loss >3 ml/min per 1.73 m(2)), and incidence of CKD and albuminuria. Serum 25-hydroxyvitamin D was measured at baseline using liquid chromatography-tandem mass spectrometry. eGFR and albuminuria were collected at baseline and follow-up. Multivariate linear and logistic regression models were used considering potential confounding factors. RESULTS Among the 4280 people included in the analysis, the mean±SD annual eGFR change was -0.57±1.78 ml/min per 1.73 m(2), and 287 (6.7%) participants presented rapid eGFR decline. Before adjustment for baseline eGFR, baseline 25-hydroxyvitamin D level was associated with both mean annual eGFR change and risk of rapid eGFR decline, independently of baseline albuminuria. Once adjusted for baseline eGFR, associations were no longer significant. For every 10 ng/ml higher baseline 25-hydroxyvitamin D, the adjusted mean annual eGFR change was -0.005 ml/min per 1.73 m(2) (95% confidence interval, -0.063 to 0.053; P=0.87) and the risk of rapid eGFR decline was null (odds ratio, 0.93; 95% confidence interval, 0.79 to 1.08; P=0.33). Baseline 25-hydroxyvitamin D level was not associated with incidence of CKD or albuminuria. CONCLUSIONS The association of 25-hydroxyvitamin D with eGFR decline is confounded by baseline eGFR. Sufficient 25-hydroxyvitamin D levels do not seem to protect from eGFR decline independently from baseline eGFR.
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Affiliation(s)
- Idris Guessous
- Division of Chronic Diseases, Institute of Social and Preventive Medicine, Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine, Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland; and Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - William McClellan
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - David Kleinbaum
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Viola Vaccarino
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | | | | | - Pedro Marques-Vidal
- Division of Chronic Diseases, Institute of Social and Preventive Medicine, Department of Internal Medicine, University Hospital Center, Lausanne, Switzerland
| | - Fred Paccaud
- Division of Chronic Diseases, Institute of Social and Preventive Medicine
| | - Jean-Marc Theler
- Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine, Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland; and
| | - Jean-Michel Gaspoz
- Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine, Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland; and
| | | | - Gérard Waeber
- Department of Internal Medicine, University Hospital Center, Lausanne, Switzerland
| | - Peter Vollenweider
- Department of Internal Medicine, University Hospital Center, Lausanne, Switzerland
| | - Murielle Bochud
- Division of Chronic Diseases, Institute of Social and Preventive Medicine
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Liebisch G, Matysik S. Accurate and reliable quantification of 25-hydroxy-vitamin D species by liquid chromatography high-resolution tandem mass spectrometry. J Lipid Res 2015; 56:1234-9. [PMID: 25833687 DOI: 10.1194/jlr.d058511] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Indexed: 11/20/2022] Open
Abstract
In general, mass spectrometric quantification of small molecules in routine laboratory testing utilizes liquid chromatography coupled to low mass resolution triple-quadrupole mass spectrometers (QQQs). Here we introduce high-resolution tandem mass spectrometry (quadrupole-Orbitrap) for the quantification of 25-hydroxy-vitamin D [25(OH)D], a marker of the vitamin D status, because the specificity of 25(OH)D immunoassays is still questionable and mass spectrometric quantification is becoming increasingly important. Liquid chromatography coupled to high-resolution tandem mass spectrometry (LC-MS/HR-MS) was used to quantify 25-hydroxy-cholecalciferol [25(OH)D3], 25-hydroxy-ergocalciferol [25(OH)D2], and their C3-epimers 3-epi-25(OH)D3 and 3-epi-25(OH)D2. The method has a run time of 5 min and was validated according to the US Food and Drug Administration and the European Medicines Agency guidelines. High mass resolution was advantageously applied to separate a quasi-isobaric interference of the internal standard D6-25(OH)D2 with 3-epi-25(OH)D3. All analytes showed an imprecision of below 10% coefficient of variation (CV), trueness between 90% and 110%, and limits of quantification below 10 nM. Concentrations measured by LC-MS/HR-MS are in good agreement with those of the National Institute of Standards and Technology reference methods using LC-MS/MS (QQQ). In conclusion, quantification of 25(OH)D by LC-MS/HR-MS is applicable for routine testing and also holds promise for highly specific quantification of other small molecules.
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Affiliation(s)
- Gerhard Liebisch
- Institute for Clinical Chemistry and Laboratory Medicine, University of Regensburg, Germany
| | - Silke Matysik
- Institute for Clinical Chemistry and Laboratory Medicine, University of Regensburg, Germany
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44
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Berendsen BJA, Wegh RS, Meijer T, Nielen MWF. The assessment of selectivity in different Quadrupole-Orbitrap mass spectrometry acquisition modes. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:337-346. [PMID: 25391727 DOI: 10.1007/s13361-014-1021-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/10/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
Selectivity of the confirmation of identity in liquid chromatography (tandem) mass spectrometry using Q-Orbitrap instrumentation was assessed using different acquisition modes based on a representative experimental data set constructed from 108 samples, including six different matrix extracts and containing over 100 analytes each. Single stage full scan, all ion fragmentation, and product ion scanning were applied. By generating reconstructed ion chromatograms using unit mass window in targeted MS(2), selected reaction monitoring (SRM), regularly applied using triple-quadrupole instruments, was mimicked. This facilitated the comparison of single stage full scan, all ion fragmentation, (mimicked) SRM, and product ion scanning applying a mass window down to 1 ppm. Single factor Analysis of Variance was carried out on the variance (s(2)) of the mass error to determine which factors and interactions are significant parameters with respect to selectivity. We conclude that selectivity is related to the target compound (mainly the mass defect), the matrix, sample clean-up, concentration, and mass resolution. Selectivity of the different instrumental configurations was quantified by counting the number of interfering peaks observed in the chromatograms. We conclude that precursor ion selection significantly contributes to selectivity: monitoring of a single product ion at high mass accuracy with a 1 Da precursor ion window proved to be equally selective or better to monitoring two transition products in mimicked SRM. In contrast, monitoring a single fragment in all ion fragmentation mode results in significantly lower selectivity versus mimicked SRM. After a thorough inter-laboratory evaluation study, the results of this study can be used for a critical reassessment of the current identification points system and contribute to the next generation of evidence-based and robust performance criteria in residue analysis and sports doping.
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Affiliation(s)
- Bjorn J A Berendsen
- RIKILT, Wageningen UR, Akkermaalsbos 2, 6708WB, P.O. Box 230, 6700AE, Wageningen, The Netherlands,
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45
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Qi Y, Geib T, Schorr P, Meier F, Volmer DA. On the isobaric space of 25-hydroxyvitamin D in human serum: potential for interferences in liquid chromatography/tandem mass spectrometry, systematic errors and accuracy issues. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:1-9. [PMID: 25462357 DOI: 10.1002/rcm.7075] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 10/10/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
RATIONALE Isobaric interferences in human serum can potentially influence the measured concentration levels of 25-hydroxyvitamin D [25(OH)D], when low resolving power liquid chromatography/tandem mass spectrometry (LC/MS/MS) instruments and non-specific MS/MS product ions are employed for analysis. In this study, we provide a detailed characterization of these interferences and a technical solution to reduce the associated systematic errors. METHODS Detailed electrospray ionization Fourier transform ion cyclotron resonance (FTICR) high-resolution mass spectrometry (HRMS) experiments were used to characterize co-extracted isobaric components of 25(OH)D from human serum. Differential ion mobility spectrometry (DMS), as a gas-phase ion filter, was implemented on a triple quadrupole mass spectrometer for separation of the isobars. RESULTS HRMS revealed the presence of multiple isobaric compounds in extracts of human serum for different sample preparation methods. Several of these isobars had the potential to increase the peak areas measured for 25(OH)D on low-resolution MS instruments. A major isobaric component was identified as pentaerythritol oleate, a technical lubricant, which was probably an artifact from the analytical instrumentation. DMS was able to remove several of these isobars prior to MS/MS, when implemented on the low-resolution triple quadrupole mass spectrometer. CONCLUSIONS It was shown in this proof-of-concept study that DMS-MS has the potential to significantly decrease systematic errors, and thus improve accuracy of vitamin D measurements using LC/MS/MS.
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Affiliation(s)
- Yulin Qi
- Institute of Bioanalytical Chemistry, Saarland University, D-66123, Saarbrücken, Germany
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46
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Qu L, Wang W, Zeng D, Lu Y, Yin Z. Quantitative performance of online SPE-LC coupled to Q-Exactive for the analysis of sofosbuvir in human plasma. RSC Adv 2015. [DOI: 10.1039/c5ra20233g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A quantitative strategy towards the detection of sofosbuvir in human plasma was developed with online-SPE-LC-HRMS using t-MS2, t-SIM and F-SIM modes.
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Affiliation(s)
- Lihua Qu
- Center of Basic Molecular Science (CBMS)
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
| | - Wenjun Wang
- Center of Basic Molecular Science (CBMS)
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
| | - Debin Zeng
- College of Pharmacy
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Yaxin Lu
- College of Pharmacy
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Zheng Yin
- Center of Basic Molecular Science (CBMS)
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
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47
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Volmer DA, Mendes LRBC, Stokes CS. Analysis of vitamin D metabolic markers by mass spectrometry: current techniques, limitations of the "gold standard" method, and anticipated future directions. MASS SPECTROMETRY REVIEWS 2015; 34:2-23. [PMID: 24318020 DOI: 10.1002/mas.21408] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 07/18/2013] [Accepted: 07/18/2013] [Indexed: 05/10/2023]
Abstract
Vitamin D compounds belong to a group of secosteroids, which occur naturally as vitamin D3 in mammals and D2 in plants. Vitamin D is vital for bone health but recent studies have shown a much wider role in the pathologies of diseases such as diabetes, cancer, autoimmune, neurodegenerative, mental and cardiovascular diseases. Photosynthesis of vitamin D in the human skin and subsequent hepatic and renal metabolism generate a wide range of transformation products occurring over a large dynamic range spanning from picomolar to nanomolar levels. This necessitates selective and sensitive analytical methods to quantitatively capture these low concentration levels in relevant tissues such as blood. Ideally, vitamin D assessment would be performed using a universal and standardized analytical method available to clinical laboratories that provides reliable and accurate quantitative results for all relevant vitamin D metabolites with sufficiently high throughput. At present, LC-MS/MS assays are the most promising techniques for vitamin D analysis. The present review focuses on developments in mass spectrometry methodologies of the past 12 years. It will highlight detrimental influences of the biological matrix, epimer contributions, pitfalls of specific mass spectrometry data acquisition routines (in particular multiple reaction monitoring, MRM), influence of ionization source, derivatization reactions, inter-laboratory comparisons on precision, accuracy, and application range of vitamin D metabolites.
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Affiliation(s)
- Dietrich A Volmer
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
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48
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Rathod A, Bonny O, Guessous I, Suter PM, Conen D, Erne P, Binet I, Gabutti L, Gallino A, Muggli F, Hayoz D, Péchère-Bertschi A, Paccaud F, Burnier M, Bochud M. Association of urinary calcium excretion with serum calcium and vitamin D levels. Clin J Am Soc Nephrol 2014; 10:452-62. [PMID: 25518946 DOI: 10.2215/cjn.12511213] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Population-based data on urinary calcium excretion are scarce. The association of serum calcium and circulating levels of vitamin D [25(OH)D2 or D3] with urinary calcium excretion in men and women from a population-based study was explored. DESIGN, SETTINGS, PARTICIPANTS, & MEASUREMENTS Multivariable linear regression was used to explore factors associated with square root-transformed 24-hour urinary calcium excretion (milligrams per 24 hours) taken as the dependent variable with a focus on month-specific vitamin D tertiles and serum calcium in the Swiss Survey on Salt Study. RESULTS In total, 624 men and 669 women were studied with mean ages of 49.2 and 47.0 years, respectively (age range=15-95 years). Mean urinary calcium excretion was higher in men than in women (183.05 versus 144.60 mg/24 h; P<0.001). In adjusted models, the association (95% confidence interval) of square root urinary calcium excretion with protein-corrected serum calcium was 1.78 (95% confidence interval, 1.21 to 2.34) mg/24 h per milligram per deciliter in women and 0.59 (95% confidence interval, -0.11 to 1.29) mg/24 h per milligram per deciliter in men. Men in the third 25(OH)D3 tertile had higher square root urinary calcium excretion than men in the first tertile (0.99; 95% confidence interval, 0.36 to 1.63 mg/24 h per nanogram per milliliter), and the corresponding association was 0.32 (95% confidence interval, -0.22 to 0.85) mg/24 h per nanogram per milliliter in women. These sex differences were more marked under conditions of high urinary sodium or urea excretions. CONCLUSIONS There was a positive association of serum calcium with urinary calcium excretion in women but not men. Vitamin 25(OH)D3 was associated with urinary calcium excretion in men but not women. These results suggest important sex differences in the hormonal and dietary control of urinary calcium excretion.
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Affiliation(s)
- Anita Rathod
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Olivier Bonny
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Idris Guessous
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Paolo M Suter
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - David Conen
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Paul Erne
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Isabelle Binet
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Luca Gabutti
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Augusto Gallino
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Franco Muggli
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Daniel Hayoz
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | | | - Fred Paccaud
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material
| | - Michel Burnier
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material.
| | - Murielle Bochud
- Due to the number of contributing authors, the affiliations are provided in the Supplemental Material.
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49
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Current position of high-resolution MS for drug quantification in clinical & forensic toxicology. Bioanalysis 2014; 6:2275-84. [DOI: 10.4155/bio.14.164] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
This paper reviews high-resolution MS approaches published from January 2011 until March 2014 for the quantification of drugs (of abuse) and/or their metabolites in biosamples using LC-MS with time-of-flight or Orbitrap™ mass analyzers. Corresponding approaches are discussed including sample preparation and mass spectral settings. The advantages and limitations of high-resolution MS for drug quantification, as well as the demand for a certain resolution or a specific mass accuracy are also explored.
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50
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Herrero P, Cortés-Francisco N, Borrull F, Caixach J, Pocurull E, Marcé RM. Comparison of triple quadrupole mass spectrometry and Orbitrap high-resolution mass spectrometry in ultrahigh performance liquid chromatography for the determination of veterinary drugs in sewage: benefits and drawbacks. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:585-96. [PMID: 25044843 DOI: 10.1002/jms.3377] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/09/2014] [Accepted: 04/11/2014] [Indexed: 05/21/2023]
Abstract
This paper presents a comparison of triple quadrupole tandem mass spectrometry (MS/MS) and Orbitrap high-resolution mass spectrometry (HRMS) combined to ultrahigh performance liquid chromatography for the determination of glucocorticoids and polyether ionophores in sewage, in order to show the major benefits and drawbacks for each mass spectrometry analyser. Overall, HRMS measurements have enhanced performance in terms of confirmatory capabilities than MS/MS measurements. Moreover, similar limits of quantification, limits of detection, linear range and repeatability for glucocorticoids with both the MS/MS and HRMS methods were compared, but in the case of polyether ionophores, slightly better limits of detection and limits of quantification were obtained with the HRMS method because of the high sensitivity obtained when diagnostic ions are used for quantification instead of selected reaction monitoring transitions for these compounds. The two methods have been applied to the analysis of several influent and effluent sewage samples from sewage treatment plants located in the Tarragona region (Catalonia, Spain), showing an excellent correlation between the two methods.
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Affiliation(s)
- P Herrero
- Department of Analytical Chemistry and Organic Chemistry, Universitat Rovira i Virgili, Sescelades Campus, Marcel·lí Domingo, s/n, 43007, Tarragona, Spain
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