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Tungmunnithum D, Drouet S, Hano C. Validation of a High-Performance Liquid Chromatography with Photodiode Array Detection Method for the Separation and Quantification of Antioxidant and Skin Anti-Aging Flavonoids from Nelumbo nucifera Gaertn. Stamen Extract. Molecules 2022; 27:molecules27031102. [PMID: 35164366 PMCID: PMC8838782 DOI: 10.3390/molecules27031102] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/30/2022] [Accepted: 02/04/2022] [Indexed: 12/12/2022]
Abstract
Nelumbo nucifera Gaertn., or the so-called sacred lotus, is a useful aquatic plant in the Nelumbonaceae family that has long been used to prepare teas, traditional medicines as well as foods. Many studies reported on the phytochemicals and biological activities of its leaves and seeds. However, to date, only few studies were conducted on its stamen, which is the most important ingredient for herbal medicines, teas and other phytopharmaceutical products. Thus, this present study focuses on the following: (1) the application of high-performance liquid chromatography with photodiode array detection for a validated separation and quantification of flavonoids from stamen; (2) the Nelumbo nucifera stamen’s in vitro and in cellulo antioxidant activities; as well as (3) its potential regarding the inhibition of skin aging enzymes for cosmetic applications. The optimal separation of the main flavonoids from the stamen ethanolic extract was effectively achieved using a core-shell column. The results indicated that stamen ethanolic extract has higher concentration of in vitro and in cellulo antioxidant flavonoids than other floral components. Stamen ethanolic extract showed the highest protective effect against reactive oxygen/nitrogen species formation, as confirmed by cellular antioxidant assay using a yeast model. The evaluation of potential skin anti-aging action showed that the stamen extract has higher potential to inhibit tyrosinase and collagenase compared with its whole flower. These current findings are the first report to suggest the possibility to employ N. nucifera stamen ethanolic extract as a tyrosinase and collagenase inhibitor in cosmetic applications, as well as the utility of the current separation method.
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Affiliation(s)
- Duangjai Tungmunnithum
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Campus Eure et Loir, Orleans University, 28000 Chartres, France;
- Le Studium Institue for Advanced Studies, 1 Rue Dupanloup, 45000 Orléans, France
- Correspondence: (D.T.); (C.H.)
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Campus Eure et Loir, Orleans University, 28000 Chartres, France;
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Campus Eure et Loir, Orleans University, 28000 Chartres, France;
- Le Studium Institue for Advanced Studies, 1 Rue Dupanloup, 45000 Orléans, France
- Correspondence: (D.T.); (C.H.)
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Zagst H, Elgert C, Behrends S, Wätzig H. Combination of strong anion exchange liquid chromatography with microchip capillary electrophoresis sodium dodecyl sulfate for rapid two-dimensional separations of complex protein mixtures. Anal Bioanal Chem 2022; 414:1699-1712. [PMID: 34870722 PMCID: PMC8761713 DOI: 10.1007/s00216-021-03797-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 10/13/2021] [Accepted: 11/19/2021] [Indexed: 11/03/2022]
Abstract
Two-dimensional separations provide a simple way to increase the resolution and peak capacity of complex protein separations. The feasibility of a recently developed instrumental approach for two-dimensional separations of proteins was evaluated. The approach is based on the general principle of two-dimensional gel electrophoresis. In the first dimension, semi-preparative strong anion exchange high-performance liquid chromatography is utilized and fractions are collected by means of a fraction collector. They are subsequently analyzed in the second dimension with microchip capillary electrophoresis sodium dodecyl sulfate. Microchip capillary electrophoresis provides the necessary speed (approximately 1 min/fraction) for short analysis. In this study, three different samples were investigated. Different constructs of soluble guanylyl cyclase were expressed in Sf9-cells using the baculovirus expression system. Cell lysates were analyzed and the resulting separations were compared. In our experimental setup, the soluble guanylyl cyclase was identified among hundreds of other proteins in these cell lysates, indicating its potential for screening, process control, or analysis. The results were validated by immunoblotting. Samples from Chinese hamster ovary cell culture before and after a purification step were investigated and approximately 9% less impurities could be observed. The separation patterns obtained for human plasma are closely similar to patterns obtained with two-dimensional gel electrophoresis and a total of 218 peaks could be observed. Overall, the approach was well applicable to all samples and, based on these results, further directions for improvements were identified. .
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Affiliation(s)
- Holger Zagst
- Technische Universität Braunschweig, Institute of Medicinal and Pharmaceutical Chemistry, Beethovenstraße 55, 38106, Braunschweig, Germany
| | - Christin Elgert
- Technische Universität Braunschweig, Institute of Pharmacology, Toxicology and Clinical Pharmacy, Mendelssohnstraße 1, 38106, Braunschweig, Germany
| | - Sönke Behrends
- Technische Universität Braunschweig, Institute of Pharmacology, Toxicology and Clinical Pharmacy, Mendelssohnstraße 1, 38106, Braunschweig, Germany
| | - Hermann Wätzig
- Technische Universität Braunschweig, Institute of Medicinal and Pharmaceutical Chemistry, Beethovenstraße 55, 38106, Braunschweig, Germany.
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Martínez-Navarro EM, Cebrián-Tarancón C, Moratalla-López N, Lorenzo C, Alonso GL, Salinas RM. Development and validation of an HPLC-DAD method for determination of oleuropein and other bioactive compounds in olive leaf by-products. J Sci Food Agric 2021; 101:1447-1453. [PMID: 32839982 DOI: 10.1002/jsfa.10758] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 07/29/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Oil mills could benefit by preparing their own aqueous extracts from olive leaves. Accordingly, the present study aimed to measure the bioactive compounds richness of such extracts, especially oleuropein. A water-based microwave extraction procedure was developed and a selective and precise high-performance liquid chromatography with diode array detection (HPLC-DAD) method was validated for the determination of oleuropein and others bioactive compounds from olive leaves. RESULTS The water solubility of oleuropein was determined to be 9.5 g L-1 . The extraction procedure was optimized in terms of power, olive leaf weight/water volume ratio and time of extraction, and the results revealed that 2 mg mL-1 and a microwave irradiation at 800 W for 30 s resulted in the greatest efficiency. Oleuropein was determined by the new validation method, which showed good linearity (r2 = 0.996), precision (% relative standard deviation < 10%), recovery (118.6%), and limits of detection (17.48 mg L-1 ) and quantification (21.54 mg L-1 ). Good correlation (r2 = 0.979) was obtained between oleuropein of the olive leaf extracts determined by HPLC-DAD and by UV-visible spectrophotometry. CONCLUSION A simple extraction method was developed and validated to obtain aqueous extract from olive leaves by microwave extraction, determining for the first time oleuropein water solubility. Validation of the method showed that oleuropein in olive leaves could be quantified when it is at least 1% of dry weight by means of HPLC-DAD. UV-visible spectrophotometry can be useful in oil mills because it enables the content of oleuropein and other bioactive compounds content to be determined in situ in such leaf aqueous extracts. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Esther M Martínez-Navarro
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
| | - Cristina Cebrián-Tarancón
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
| | - Natalia Moratalla-López
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
| | - Cándida Lorenzo
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
| | - Gonzalo L Alonso
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
| | - Rosario M Salinas
- Cátedra de Química Agrícola, Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Albacete, Spain
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Majuta SN, DeBastiani A, Li P, Valentine SJ. Combining Field-Enabled Capillary Vibrating Sharp-Edge Spray Ionization with Microflow Liquid Chromatography and Mass Spectrometry to Enhance 'Omics Analyses. J Am Soc Mass Spectrom 2021; 32:473-485. [PMID: 33417454 PMCID: PMC8132193 DOI: 10.1021/jasms.0c00376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Field-enabled capillary vibrating sharp-edge spray ionization (cVSSI) has been combined with high-flow liquid chromatography (LC) and mass spectrometry (MS) to establish current ionization capabilities for metabolomics and proteomics investigations. Comparisons are made between experiments employing cVSSI and a heated electrospray ionization probe representing the state-of-the-art in microflow LC-MS methods for 'omics studies. For metabolomics standards, cVSSI is shown to provide an ionization enhancement by factors of 4 ± 2 for both negative and positive ion mode analyses. For chymotryptic peptides, cVSSI is shown to provide an ionization enhancement by factors of 5 ± 2 and 2 ± 1 for negative and positive ion mode analyses, respectively. Slightly broader high-performance liquid chromatography peaks are observed in the cVSSI datasets, and several studies suggest that this results from a slightly decreased post-split flow rate. This may result from partial obstruction of the pulled-tip emitter over time. Such a challenge can be remedied with the use of LC pumps that operate in the 10 to 100 μL·min-1 flow regime. At this early stage, the proof-of-principle studies already show ion signal advantages over state-of-the-art electrospray ionization (ESI) for a wide variety of analytes in both positive and negative ion mode. Overall, this represents a ∼20-50-fold improvement over the first demonstration of LC-MS analyses by voltage-free cVSSI. Separate comparisons of the ion abundances of compounds eluting under identical solvent conditions reveal ionization efficiency differences between cVSSI and ESI and may suggest varied contributions to ionization from different physicochemical properties of the compounds. Future investigations of parameters that could further increase ionization gains in negative and positive ion mode analyses with the use of cVSSI are briefly presented.
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Affiliation(s)
- Sandra N. Majuta
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown WV 26501
| | - Anthony DeBastiani
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown WV 26501
| | - Peng Li
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown WV 26501
| | - Stephen J. Valentine
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown WV 26501
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Wayment DG, Ledet HJ, Torres KA, White PM. Soil dissipation of sugarcane billet seed treatment fungicides and insecticide using QuEChERS and HPLC. J Environ Sci Health B 2021; 56:188-196. [PMID: 33499735 DOI: 10.1080/03601234.2020.1858685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Chemical treatment of sugarcane seed with fungicides and insecticides prior to planting increases yields of cane and sugar for the perennial, annually harvested crop. However, the fate of the applied chemicals is unknown. Therefore, the purpose of this study was to measure the aerobic dissipation of selected billet seed treatment chemicals in a mineral sugarcane soil from Louisiana. Soil samples from the surface 15 cm were treated with either thiamethoxam, azoxystrobin, fluxapyroxad, propiconazole, or pyraclostrobin and monitored over 100 days under laboratory conditions. Insecticide and fungicide levels were determined by high performance liquid chromatography. Dissipation data were fitted to four kinetic models: simple first-order (SFO), first order multi-compartment (FOMC), double-first order in parallel (DFOP), and hockey-stick (HS). The dissipation half-life (DT50) of thiamethoxam, azoxystrobin, fluxapyroxad, propiconazole, or pyraclostrobin were 275, 100, 144, 74, and 39 d, respectively. Overall, the DT50 for the pesticides in the study indicated medium to long persistence in soil under the conditions of the experiment. This is the first report for several of these pesticides related to the aerobic dissipation in soils used to grow sugarcane.
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Affiliation(s)
- Darcey G Wayment
- Department of Chemistry and Physical Sciences, Nicholls State University, Thibodaux, Louisiana, USA
| | - Harley J Ledet
- Department of Chemistry and Physical Sciences, Nicholls State University, Thibodaux, Louisiana, USA
| | - Kylie A Torres
- Department of Chemistry and Physical Sciences, Nicholls State University, Thibodaux, Louisiana, USA
| | - Paul M White
- Agricultural Research Service (ARS), United States Department of Agriculture (USDA), Sugarcane Research Unit, Houma, Louisiana, USA
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Núñez N, Martínez C, Saurina J, Núñez O. High-performance liquid chromatography with fluorescence detection fingerprints as chemical descriptors to authenticate the origin, variety and roasting degree of coffee by multivariate chemometric methods. J Sci Food Agric 2021; 101:65-73. [PMID: 32608518 DOI: 10.1002/jsfa.10615] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/23/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Coffee is one of the most popular beverages around the world, consumed as an infusion of ground roasting coffee beans with a characteristic taste and flavor. Two main varieties, Arabica and Robusta, are produced worldwide. Furthermore, interest of consumers in quality attributes related to coffee production region and varieties is increasing. Thus, it is necessary to encourage the development of simple methodologies to authenticate and guarantee the coffee origin, variety and roasting degree, aiming to prevent fraudulent practices. RESULTS C18 high-performance liquid chromatography with fluorescence detection (HPLC-FLD) fingerprints obtained after brewing coffees without any sample treatment other than filtration (i.e. considerably reducing sample manipulation) were employed as sample chemical descriptors for subsequent coffee characterization and classification by principal component analysis (PCA) and partial least squares regression-discriminant analysis (PLS-DA). PLS-DA showed good classification capabilities regarding coffee origin, variety and roasting degree when employing HPLC-FLD fingerprints, although overlapping occurred for some sample groups. However, the discrimination power increased when selecting HPLC-FLD fingerprinting segments richer in discriminant features, which were deduced from PLS-DA loading plots. In this case, excellent separation was observed and 100% classification rates for both PLS-DA calibrations and predictions were obtained (all samples were correctly classified within their corresponding groups). CONCLUSION HPLC-FLD fingerprinting segments were3 found to be suitable chemical descriptors for discriminating the origin (country of production), variety (Arabica and Robusta) and roasting degree of coffee. Therefore, HPLC-FLD fingerprinting can be proposed as a feasible, simple and cheap methodology to address coffee authentication, especially for developing coffee production countries. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Nerea Núñez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain
| | - Clara Martínez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain
| | - Javier Saurina
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain
- Research Institute in Food Nutrition and Food Safety, University of Barcelona, Barcelona, Spain
| | - Oscar Núñez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain
- Research Institute in Food Nutrition and Food Safety, University of Barcelona, Barcelona, Spain
- Serra Hunter Fellow. Generalitat de Catalunya, Barcelona, Spain
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Aqel A, Alkatheri N, Ghfar A, Alsubhi AM, ALOthman ZA, Badjah-Hadj-Ahmed AY. Preparation of value-added metal-organic frameworks for high-performance liquid chromatography. Towards green chromatographic columns. J Chromatogr A 2020; 1638:461857. [PMID: 33486220 DOI: 10.1016/j.chroma.2020.461857] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/20/2020] [Accepted: 12/26/2020] [Indexed: 11/19/2022]
Abstract
This work applies the concepts of green chemistry, where polyethylene terephthalate (PET) bottles were used as the acid-dicarboxylic linker source for the synthesis of MIL-53(Al) metal organic frameworks (MOFs) and then used as a stationary phase for the separation of various solutes and compared with MIL-53(Al) synthesized from traditional terephthalic acid. Both synthesized MIL-53(Al) MOFs were characterized by scanning electron microscopy (SEM), FT-IR, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and specific surface area analysis. Eight groups of standard analytes in addition to real samples were tested to evaluate the separation performance of the MIL-53(Al) packed columns in HPLC under various chromatographic conditions. Based on elution order of the studied compounds and the effects of mobile phase composition, the working mechanism was reversed phase mode in the presence of size-exclusion effects for large molecules, which exceeded the dynamic diameter of MIL-53(Al) (~7.6 Å). The effects of stationary phase sieving, mobile phase flow rate and composition, injected sample mass, and temperature were investigated relative to the chromatographic behavior of MIL-53(Al). MIL-53(Al) particle sieving before packing reduced peak broadening and significantly enhanced the chromatographic performance of the prepared columns up to 2.26 times relative to the number of theoretical plates. The MIL-53(Al) packed columns offered high-resolution separation for all studied mixtures with Rs >2 and good stability and long-term durability. At optimal conditions, the prepared columns exhibited efficiencies between 5600-63200 plates m-1. Higher efficiencies were observed for alkylbenzenes and polyaromatic hydrocarbons as the organic linker in the MIL-53(Al) structure, which improved retention and separation of aromatics through π-π interactions. Thermodynamic parameters including ΔH, ΔS, and ΔG for the transfer of analyte from the mobile phase to the MIL-53(Al) stationary phase were studied. Compared with previously cited MOFs packed columns, the present MIL-53(Al) columns gave comparable selectivity and much better efficiency for most of the studied chemicals at optimum conditions, indicating the feasibility of MIL-53(Al) as a stationary phase for HPLC applications.
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Affiliation(s)
- Ahmad Aqel
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
| | - Norah Alkatheri
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ayman Ghfar
- Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ameen M Alsubhi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Zeid A ALOthman
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia; Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Varga E, Ladányi M, Fodor P, Soros C. Comparison of QuEChERS and "dilute and shoot" extraction methods for multi-mycotoxin analysis of samples from button mushroom ( Agaricus bisporus) cultivation. J Environ Sci Health B 2020; 56:99-108. [PMID: 33571042 DOI: 10.1080/03601234.2020.1852046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Several components of mushroom compost (wheat straw, chicken manure) can be contaminated with mycotoxins posing food health risks to mushroom consumers. To assess the relevance of such contaminations high-throughput analytical methods are needed. In this study, two sample preparation approaches, dilute & shoot (D&S) and modified citrate buffered Quick, Easy, Cheap, Effective, Rugged, Safe (QuEChERS) were compared in terms of extraction efficiency and matrix effect in case of 13 mycotoxins in complex matrices-wheat straw, the growing media and button mushrooms (Agaricus bisporus)-of mushroom cultivation using high-performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS). D&S method resulted in recoveries of LB medium, button mushroom and compost for ≥60% in case of all investigated mycotoxins except for DON-3G. However, using modified citrate buffered QuEChERS with 2% acidification of the extraction solvent showed the complete loss of strongly polar DON-3G and fumonisin B1 (FB1). The investigated matrices had suppressive effect on ionization in all target mycotoxins except for FB1. Regarding the use of isotopologues to compensate matrix effect, even U-[13C15]-DON and U-[13C24]-T-2 can also be used to quantify their related metabolites in the studied matrices, using internal standard method.
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Affiliation(s)
- Emese Varga
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
| | - Márta Ladányi
- Faculty of Horticultural Science, Department of Biometrics and Agricultural Informatics, Szent István University, Budapest, Hungary
| | - Péter Fodor
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
| | - Csilla Soros
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
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Rodrigues MF, Pereira I, Morais RL, Lobón GS, Gil EDS, Vaz BG. A New Strategy for the Analysis of Steroid Hormones in Industrial Wastewaters by Paper Spray Ionization Mass Spectrometry. J Am Soc Mass Spectrom 2020; 31:2250-2257. [PMID: 32930580 DOI: 10.1021/jasms.0c00145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new approach using paper spray ionization mass spectrometry (PSI-MS) for the analysis of steroid hormones in wastewater samples has been demonstrated. Triangular papers containing paraffin barriers as microfluidic channels were used to direct the sample solution to the paper tip, preventing the sample from spreading over the corners of the paper. The method was used to analyze the hormones levonorgestrel and algestone acetophenide in industrial wastewaters. Analytical curves presented a correlation coefficient (R2) above 0.99. Limits of quantification were below 2.3 ppm and limits of detection below 0.7 ppm. Values of precision (coefficient of variation) and accuracy (relative error) were less than 15% for all analyses. Recovery results ranged from 82% to 102%. Levonorgestrel was also analyzed by high-performance liquid chromatography coupled to mass spectrometry in order to compare the analytical performance with PSI-MS. No statistically significant differences were found between both methods. This study demonstrates the usefulness of PSI-MS for rapid analysis of hormones in industrial wastewater samples and also indicates its potential to be employed as a simple and reliable analytical method in environmental sciences.
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Affiliation(s)
| | - Igor Pereira
- Chemistry Institute, Federal University of Goiás, Goiânia 74690900, Brazil
| | - Ruiter Lima Morais
- Faculty of Pharmacy, Federal University of Goiás, Goiânia 74690900, Brazil
| | - Gérman Sanz Lobón
- Chemistry Institute, Federal University of Goiás, Goiânia 74690900, Brazil
| | - Eric de Souza Gil
- Faculty of Pharmacy, Federal University of Goiás, Goiânia 74690900, Brazil
| | - Boniek Gontijo Vaz
- Chemistry Institute, Federal University of Goiás, Goiânia 74690900, Brazil
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Miller KE, Jorgenson JW. Comparison of microcapillary column length and inner diameter investigated with gradient analysis of lipids by ultrahigh-pressure liquid chromatography-mass spectrometry. J Sep Sci 2020; 43:4094-4102. [PMID: 32946185 PMCID: PMC7727313 DOI: 10.1002/jssc.202000545] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/15/2020] [Accepted: 08/24/2020] [Indexed: 11/29/2022]
Abstract
Biological samples in lipidomic studies can consist of extremely complex mixtures due to the diverse range of species and isomerism. Herein, highly efficient, in-house packed microcapillary columns introduce the potential to better separate these complex mixtures. We compared the effects of changing column length (15, 30, and 60 cm) and inner diameter (75 and 100 μm) on lipid separation efficiency by reversed-phase gradient analysis using ultrahigh-pressure liquid chromatography coupled to mass spectrometry with operating pressures ranging from 450 to 2200 bar. Seven lipid standards composed of phosphatidylcholine and triacylglycerol species were analyzed at four different gradient rates to calculate conditional peak capacity. The longest column, 60 cm, at the shallowest gradient of 2% gave the highest peak capacity of 359 with a separation window of 2 h. The intermediate column length of 30 cm with 75 μm inner diameter provided a peak capacity of 287 with a separation window of 1 h. There was no significant difference in peak capacity between 75 and 100 μm inner diameter columns. This study showed that using highly efficient microcapillary columns increased peak capacity and resolution of lipids, and thus, this technique seems promising for enhancing lipid coverage and enabling better discovery of lipid biomarkers.
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Affiliation(s)
- Kelsey E. Miller
- Center for Environmental Measurement and ModelingU.S. Environmental Protection AgencyResearch Triangle ParkNorth Carolina27709USA
| | - James W. Jorgenson
- Department of ChemistryUniversity of North Carolina at Chapel HillChapel HillNorth Carolina27599USA
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Yan Y, Xing T, Wang S, Li N. Versatile, Sensitive, and Robust Native LC-MS Platform for Intact Mass Analysis of Protein Drugs. J Am Soc Mass Spectrom 2020; 31:2171-2179. [PMID: 32865416 DOI: 10.1021/jasms.0c00277] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Over the past several years, hyphenation of native (nondenaturing) liquid chromatography (nLC) methods, such as size exclusion chromatography (SEC), ion exchange chromatography (IEX), and hydrophobic interaction chromatography (HIC) with mass spectrometry (MS) have become increasingly popular to study the size, charge, and structural heterogeneity of protein drug products. Despite the availability of a wide variety of nLC-MS methods, an integrated platform that can accommodate different applications is still lacking. In this study, we described the development of a versatile, sensitive, and robust nLC-MS platform that can support various nLC-MS applications. In particular, the developed platform can tolerate a wide range of LC flow rates and high salt concentrations, which are critical for accommodating different nLC methods. In addition, a dopant-modified desolvation gas can be readily applied on this platform to achieve online charge-reduction native MS, which improves the characterization of both heterogeneous and labile biomolecules. Finally, we demonstrated that this nLC-MS platform is highly sensitive and robust and can be routinely applied in protein drug characterization.
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Affiliation(s)
- Yuetian Yan
- Analytical Chemistry Group, Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591-6707, United States
| | - Tao Xing
- Analytical Chemistry Group, Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591-6707, United States
| | - Shunhai Wang
- Analytical Chemistry Group, Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591-6707, United States
| | - Ning Li
- Analytical Chemistry Group, Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591-6707, United States
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Tsizin S, Fialkov AB, Amirav A. Analysis of impurities in pharmaceuticals by LC-MS with cold electron ionization. J Mass Spectrom 2020; 55:e4587. [PMID: 32662574 DOI: 10.1002/jms.4587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/08/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Pharmaceuticals require careful and precise determination of their impurities that might harm the user upon consumption. Although today, the most common technique for impurities identification is liquid chromatography-mass spectrometry (LC-MS/MS), it has several downsides due to the nature of the ionization method. Also, the analyses in many cases are targeted thus despite being present, some of the compounds will not be revealed. In this paper, we propose and show a new method for untargeted analysis and identification of impurities in active pharmaceutical ingredients (APIs). The instrument used for these analyses is a novel electron ionization (EI) LC-MS with supersonic molecular beams (SMB). The EI-LC-MS-SMB was implemented for analyses of several drug samples spiked with an impurity. The instrument provides EI mass spectra with enhanced molecular ions, named Cold EI, which increases the identification probabilities when the compound is identified with the aid of an EI library like National Institute of Standards and Technology (NIST). We analyzed ibuprofen and its impurities, and both the API and the expected impurity were identified with names and structures by the NIST library. Moreover, other unexpected impurities were found and identified proving the ability of the EI-LC-MS-SMB system for truly untargeted analysis. The results show a broad dynamic range of four orders of magnitude at the same run with a signal-to-noise ratio of over 10 000 for the API and almost uniform response.
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Affiliation(s)
- Svetlana Tsizin
- School of Chemistry, Tel Aviv University, Tel Aviv, 69978, Israel
| | | | - Aviv Amirav
- School of Chemistry, Tel Aviv University, Tel Aviv, 69978, Israel
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13
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Logtenberg M, Donners KMH, Vink JCM, van Leeuwen SS, de Waard P, de Vos P, Schols HA. Touching the High Complexity of Prebiotic Vivinal Galacto-oligosaccharides Using Porous Graphitic Carbon Ultra-High-Performance Liquid Chromatography Coupled to Mass Spectrometry. J Agric Food Chem 2020; 68:7800-7808. [PMID: 32551629 PMCID: PMC7378999 DOI: 10.1021/acs.jafc.0c02684] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/10/2020] [Accepted: 06/17/2020] [Indexed: 06/07/2023]
Abstract
Galacto-oligosaccharides (GOS) are used in infant formula to replace the health effects of human milk oligosaccharides, which appear to be dependent upon the structure of the individual oligosaccharides present. However, a comprehensive overview of the structure-specific effects is still limited as a result of the high structural complexity of GOS. In this study, porous graphitic carbon (PGC) was used as the stationary phase during ultra-high-performance liquid chromatography-mass spectrometry (UHPLC-MS). This approach resulted in the recognition of more than 100 different GOS structures in one single run, including reducing and non-reducing GOS isomers. Using nuclear magnetic resonance-validated structures of GOS trisaccharides, we discovered MS fragmentation rules to distinguish reducing isomers with a mono- and disubstituted terminal glucose by UHPLC-PGC-MS. UHPLC-PGC-MS enabled effective recognition of structural features of individual GOS components in complex GOS preparations and during, e.g., biological conversion reactions. Hence, this study lays the groundwork for future research into structure-specific health effects of GOS.
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Affiliation(s)
- Madelon
J. Logtenberg
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, 6708 WG Wageningen, Netherlands
| | - Kristel M. H. Donners
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, 6708 WG Wageningen, Netherlands
| | - Jolien C. M. Vink
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, 6708 WG Wageningen, Netherlands
| | - Sander S. van Leeuwen
- Cluster
Human Nutrition & Health, Department of Laboratory Medicine, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, Netherlands
| | - Pieter de Waard
- Magnetic
Resonance Research Facility (MAGNEFY), Wageningen
University & Research, Stippeneng 4, 6708 WE Wageningen, Netherlands
| | - Paul de Vos
- Immunoendocrinology,
Department of Pathology and Medical Biology, University of Groningen and University Medical Centre Groningen, Hanzeplein 1, 9700 RB Groningen, Netherlands
| | - Henk A. Schols
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, 6708 WG Wageningen, Netherlands
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14
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Khorshidi N, Rahimi M, Salimikia I. Application of aeration-assisted homogeneous liquid-liquid microextraction procedure using Box-Behnken design for determination of curcumin by HPLC. J Sep Sci 2020; 43:2513-2520. [PMID: 32255267 DOI: 10.1002/jssc.202000001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 03/13/2020] [Accepted: 03/26/2020] [Indexed: 01/30/2023]
Abstract
A simple, efficient, and rapid sample preparation method based on aeration-assisted homogeneous liquid-liquid microextraction was developed for determination of curcumin in food samples by high-performance liquid chromatography. The centrifuge step has been eliminated in this procedure. The effects of some variables, such as pH, volume of extraction solvent, extraction time, and salt effect, were studied through a Box-Behnken design method. Under the optimum conditions, calibration curves of curcumin were linear in the range of 0.08-4000 μg/mL with R2 = 0.997. Limit of detection and relative standard deviation were 0.019 μg/mL and 3.01%, respectively. The preconcentration factor achieved was 166. The proposed method was successfully applied to determination of curcumin in various food samples.
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Affiliation(s)
- Neda Khorshidi
- Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
- Faculty of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Marzieh Rahimi
- Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
- Faculty of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Iraj Salimikia
- Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
- Department of Pharmacognosy, Faculty of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran
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15
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Abstract
Multidimensional protein identification (MudPIT), developed in the Yates Laboratory 20 years ago, is regarded as a powerful tool for proteomics research. Due to its remarkable online separation advantages, MudPIT has been widely used to facilitate discoveries in the field of proteomics research. However, it has one major disadvantage: the process of eluting peptides during strong cation exchange introduces salts, of different concentrations, into the mass spectrometer. Considering the sensitivity of the new generation of high-resolution mass spectrometers, developing a new version of MudPIT that could eliminate the introduction of salts in the elute would be a significant advancement to current technology. Herein, we developed a new, clean version of MudPIT called parallel channels-multidimensional protein identification technology (PC-MudPIT) to overcome this issue. In this design, the original biphasic trapping column was replaced by two parallel analytical column channels. We successfully averted the salt contamination yet retained all the other advantages of MudPIT. A total of 8161 and 7359 protein groups were identified from A549 whole cell lysate using PC-MudPIT and classic MudPIT, respectively. Moreover, we discovered the additional advantage that, in online mode, PC-MudPIT can also be used for an enrichment process of phosphopeptide identification. We identified a total 11453 phosphopeptides using PC-MudPIT and 7729 phosphopeptides using offline TiO2 enrichment followed by classic MudPIT. These advances indicate the possibility of other innovative applications of PC-MudPIT technology in deep proteome exploration.
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Affiliation(s)
- Nan Zhang
- Center for Precision Medicine Multi-omics Research, Peking University Health Science Center, Beijing 100191, China
| | - Xiaojing Liu
- State Key Laboratory of Molecular Biology, Shanghai Science Research Center, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China
| | - Shuaixin Gao
- Center for Precision Medicine Multi-omics Research, Peking University Health Science Center, Beijing 100191, China
| | - Catherine Chiulan Wong
- Center for Precision Medicine Multi-omics Research, Peking University Health Science Center, Beijing 100191, China
- School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
- Peking University First Hosptal, Beijing 100034, China
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16
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Gbashi S, Njobeh PB, Madala NE, De Boevre M, Kagot V, De Saeger S. Parallel validation of a green-solvent extraction method and quantitative estimation of multi-mycotoxins in staple cereals using LC-MS/MS. Sci Rep 2020; 10:10334. [PMID: 32587262 PMCID: PMC7316717 DOI: 10.1038/s41598-020-66787-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 05/13/2020] [Indexed: 11/21/2022] Open
Abstract
In this study, 15 different mycotoxins were estimated in three staple cereals from selected agro-ecological regions in Nigeria using a 'novel' green extraction method, pressurized hot water extraction (PHWE) in comparison to a conventional solvent extraction method. Discrimination of the results of PHWE and solvent extraction using principal component analysis (PCA) and orthogonal projection to latent structures discriminate analysis (OPLS-DA) did not yield any differential clustering patterns. All maize samples (n = 16), 32% (n = 38) of sorghum and 35% (n = 37) of millet samples were positive for at least one of the 15 tested mycotoxins. Contamination levels for the cereals were higher in the warm humid rain forest region and gradually decreased towards the hot and arid region in the north of the country. The results demonstrate the applicability of PHWE as a possible alternative extraction method to conventional methods of extraction, which are solvent based.
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Affiliation(s)
- Sefater Gbashi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, P.O Box 17011, Doornfontein Campus, 2028, Gauteng, South Africa.
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, P.O Box 17011, Doornfontein Campus, 2028, Gauteng, South Africa.
| | - Ntakadzeni Edwin Madala
- Department of Biochemistry, School of Mathematical and Natural Sciences, University of Venda, Thohoyandou, South Africa
| | - Marthe De Boevre
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, 9000, Ghent, Belgium
| | - Victor Kagot
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, 9000, Ghent, Belgium
| | - Sarah De Saeger
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, P.O Box 17011, Doornfontein Campus, 2028, Gauteng, South Africa
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, 9000, Ghent, Belgium
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17
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Manousi N, Tzanavaras PD, Zacharis CK. Bioanalytical HPLC Applications of In-Tube Solid Phase Microextraction: A Two-Decade Overview. Molecules 2020; 25:molecules25092096. [PMID: 32365828 PMCID: PMC7248733 DOI: 10.3390/molecules25092096] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/18/2022] Open
Abstract
In-tube solid phase microextraction is a cutting-edge sample treatment technique offering significant advantages in terms of miniaturization, green character, automation, and preconcentration prior to analysis. During the past years, there has been a considerable increase in the reported publications, as well as in the research groups focusing their activities on this technique. In the present review article, HPLC bioanalytical applications of in-tube SPME are discussed, covering a wide time frame of twenty years of research reports. Instrumental aspects towards the coupling of in-tube SPME and HPLC are also discussed, and detailed information on materials/coatings and applications in biological samples are provided.
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Affiliation(s)
- Natalia Manousi
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (N.M.); (P.D.T.)
| | - Paraskevas D. Tzanavaras
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; (N.M.); (P.D.T.)
| | - Constantinos K. Zacharis
- Laboratory of Pharmaceutical Analysis, Department of Pharmaceutical Technology, School of Pharmacy, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
- Correspondence: ; Tel.: +30-231-099-7663
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18
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Chen L, Xin X, Feng H, Li S, Cao Q, Wang X, Vriesekoop F. Isolation and Identification of Anthocyanin Component in the Fruits of Acanthopanax Sessiliflorus (Rupr. & Maxim.) Seem. by Means of High Speed Counter Current Chromatography and Evaluation of Its Antioxidant Activity. Molecules 2020; 25:molecules25081781. [PMID: 32295006 PMCID: PMC7221754 DOI: 10.3390/molecules25081781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/08/2020] [Accepted: 04/10/2020] [Indexed: 11/16/2022] Open
Abstract
Acanthopanax sessiliflorus (Rupr. & Maxim.) Seem. (Araliaceae) is one of the most abundant species of genus Acanthopanax. The fruits of A. sessiliflorus are used in traditional medical protocols as an analgesic, tonic, antidiabetic, antihypertensive, anti-inflammatory, antitumor, and immune-stimulating agent. In this work, we carried out a comprehensive investigation into the anthocyanin components in the fruits of A. sessiliflorus. The anthocyanin content in the fresh fruits of A. sessiliflorus was determined by high performance liquid chromatography-diode array detection (HPLC/DAD), and the anthocyanin component was isolated from these using high-speed counter-current chromatography (HSCCC) and elucidated by electro-spray ionization-mass spectrometry (ESI/MS), 1H- and 13C-NMR. Its antioxidant activity was evaluated by ferric-reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). We found that A. sessiliflorus contained a gross anthocyanin content of 121.35 mg/100 g. HSCCC was successfully used for separation and purification of the primary anthocyanin component, cyanidin 3-xylosyl-galactoside. The antioxidant and radical scavenging tests indicated that cyanidin 3-xylosyl-galactoside is a potent antioxidant.
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Affiliation(s)
- Liang Chen
- College of Bioengineering, Beijing Polytechnic, Beijing 100176, China; (L.C.); (H.F.); (S.L.); (Q.C.)
| | - Xiulan Xin
- College of Bioengineering, Beijing Polytechnic, Beijing 100176, China; (L.C.); (H.F.); (S.L.); (Q.C.)
- Correspondence: (X.X.); (F.V.); Tel.: +44-1952-820-280 (F.V.)
| | - Hui Feng
- College of Bioengineering, Beijing Polytechnic, Beijing 100176, China; (L.C.); (H.F.); (S.L.); (Q.C.)
| | - Shuangshi Li
- College of Bioengineering, Beijing Polytechnic, Beijing 100176, China; (L.C.); (H.F.); (S.L.); (Q.C.)
| | - Qiguang Cao
- College of Bioengineering, Beijing Polytechnic, Beijing 100176, China; (L.C.); (H.F.); (S.L.); (Q.C.)
| | - Xinying Wang
- MSD R&D (China) Ltd. Co., Beijing 100029, China;
| | - Frank Vriesekoop
- Department of Food Technology and Innovation, Harper Adams University, Newport TF10 8NB, UK
- Correspondence: (X.X.); (F.V.); Tel.: +44-1952-820-280 (F.V.)
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19
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Hara K, Koga M, Shinozaki H, Yamauchi M, Suzuki T, Naruse R, Tsuchiya T, Takebayashi K, Inukai T, Hashimoto K. Hb Phnom Penh Showing Falsely High or Reasonable HbA1c Values Depending on the Type of High-performance Liquid Chromatography System. Intern Med 2020; 59:805-809. [PMID: 31787693 PMCID: PMC7118387 DOI: 10.2169/internalmedicine.3306-19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
We herein report a 50-year-old Chinese woman with Hb Phnom Penh (α117Phe-Ile-α118Thr) showing high or reasonable HbA1c values depending on the type of high-performance liquid chromatography (HPLC) system. A high HbA1c value of 7.5% (HPLC assay: G9) and a reasonable HbA1c value of 5.2% (assay unknown) were observed. Therefore, the patient was refereed to our hospital; the oral glucose tolerance test showed normal glucose tolerance. The HbA1c values measured by an enzymatic assay, immunoassay, and affinity assay, as well as most HPLC assays were within the reference range, whereas those measured by the Tosoh HPLC systems were high.
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Affiliation(s)
- Kenji Hara
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Masafumi Koga
- Department of Internal Medicine, Hakuhokai Central Hospital, Japan
| | - Hiroyuki Shinozaki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Mototaka Yamauchi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Tatsuhiko Suzuki
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Rika Naruse
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Takafumi Tsuchiya
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Kohzo Takebayashi
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Toshihiko Inukai
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
| | - Koshi Hashimoto
- Department of Diabetes, Endocrinology and Hematology, Dokkyo Medical University Saitama Medical Center, Japan
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20
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Li S, Cai WJ, Wang W, Sun MX, Feng YQ. Rapid Analysis of Monosaccharides in Sub-milligram Plant Samples Using Liquid Chromatography-Mass Spectrometry Assisted by Post-column Derivatization. J Agric Food Chem 2020; 68:2588-2596. [PMID: 32031793 DOI: 10.1021/acs.jafc.9b07623] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Monosaccharides play important roles in plant growth and development, and their biofunctions are closely related to their endogenous contents. Therefore, the determination of monosaccharides is beneficial for the further study of monosaccharide biofunction. In this work, we developed a liquid chromatography-mass spectrometry analytical method assisted by a post-column derivatization technique (LC-PCD-MS) for the fast and automatic determination of 16 monosaccharides in samples. Post-column chemical derivatization of monosaccharides was performed by a reaction of monosaccharides with 4-benzylaminobenzeneboronic acid (4-PAMBA) through boronate ester formation in a three-way connector. 4-PAMBA worked as a derivatization reagent to improve the selectivity and sensitivity of monosaccharide detection by MS. The developed LC-PCD-MS method integrates LC separation, chemical derivatization, and MS detection in one run, thus greatly reducing the analysis time for each sample. The limits of detection and limits of quantification for 16 monosaccharides were in the range of 0.002-0.1 and 0.007-0.5 ng/mL, respectively. Good linearity was obtained from the linear regression, with a determination coefficient (R2) ranging from 0.9928 to 1.0000. The relative recoveries were in the range of 80.7-117.8%, with the intra- and interday relative standard deviations less than 19.7 and 16.5%, respectively, indicating good accuracy and acceptable reproducibility of the method. Finally, the method was successfully applied to investigate the spatial and temporal distribution of 16 monosaccharides in the developing flower and germinating seed of Arabidopsis thaliana.
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Affiliation(s)
- Sha Li
- Department of Chemistry , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
| | - Wen-Jing Cai
- Department of Chemistry , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
| | - Wei Wang
- State Key Laboratory of Hybrid Rice, Department of Cell and Developmental Biology, College of Life Sciences , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
| | - Meng-Xiang Sun
- State Key Laboratory of Hybrid Rice, Department of Cell and Developmental Biology, College of Life Sciences , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
| | - Yu-Qi Feng
- Department of Chemistry , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
- Frontier Science Center for Immunology and Metabolism , Wuhan University , Wuhan , Hubei 430072 , People's Republic of China
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21
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Paal M, Heilmann M, Koch S, Bertsch T, Steinmann J, Höhl R, Liebchen U, Schuster C, Kleine FM, Vogeser M. Comparative LC-MS/MS and HPLC-UV Analyses of Meropenem and Piperacillin in Critically Ill Patients. Clin Lab 2020; 65. [PMID: 31532096 DOI: 10.7754/clin.lab.2019.190210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Therapeutic drug monitoring (TDM) of beta-lactam antibiotics has become a valuable tool to guide dosing in critically ill patients. The main goal of the study was to compare two routinely used techniques for beta-lactam TDM in intensive care unit (ICU) patient samples, namely isotope dilution liquid chromatography tandem mass spectrometry (ID-LC-MS/MS) and high-performance liquid chromatography combined with ultra-violet detection (HPLC-UV). METHODS A set of 80 sera/plasma samples from ICU patients receiving therapeutic meropenem or piperacillin dosage was investigated. Sample duplicates and quality assessment samples were assayed in parallel with an in-house LC-MS/MS and a commercially available IVD HPLC-UV kit. A pharmacokinetic and pharmacodynamic (PK/PD) target with ≥ 22.5 mg/L for piperacillin and ≥ 8.0 mg/L for meropenem was used for medical assessment of trough sample (n = 40) antibiotic concentrations. RESULTS There was no difference between serum and Li-heparin plasmas. Concentration deviations were found for 4% of meropenem and 17% of piperacillin samples. Eliminating the influence of the systemic bias of approximately 10% for piperacillin, measurement discrepancies ≥ 25% between LC-MS/MS and HPLC-UV analyses were only observed for ≈ 4 - 6% of all samples. In the same way, identical PK/PD target attainment rates of 50 - 60% could be obtained. CONCLUSIONS After correction of the analytical bias for piperacillin measurements, both methods showed comparable results, also with respect to clinical decision limits. HPLC-UV analysis is an adequate TDM methodology for testing of beta-lactam antibiotics in centers where no special knowledge in LC-MS/MS based TDM is present. However, potential matrix effects, interferences, and calibration issues for both methods must be taken into account.
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22
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Sorensen MJ, Miller KE, Jorgenson JW, Kennedy RT. Ultrahigh-Performance capillary liquid chromatography-mass spectrometry at 35 kpsi for separation of lipids. J Chromatogr A 2020; 1611:460575. [PMID: 31607445 PMCID: PMC6980658 DOI: 10.1016/j.chroma.2019.460575] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 12/24/2022]
Abstract
Improvements in sample preparation, separation, and mass spectrometry continue to expand the coverage in LC-MS based lipidomics. While longer columns packed with smaller particles in theory give higher separation performance compared to shorter columns, the implementation of this technology above commercial limits has been sparse due to difficulties in packing long columns and successfully operating instruments at ultrahigh pressures. In this work, a liquid chromatograph that operates up to 35 kpsi was investigated for the separation and identification of lipid species from human plasma. Capillary columns between 15-50 cm long were packed with 1.7 µm BEH C18 particles and evaluated for their ability to separate lipid isomers and complex lipid extracts from human plasma. Putative lipid class identifications were assigned using accurate mass and relative retention time data of the eluting peaks. Our findings indicate that longer columns packed and operated at 35 kpsi outperform shorter columns packed and run at lower pressures in terms of peak capacity and numbers of features identified. Packing columns with relatively high concentration slurries (200 mg/mL) while sonicating the column resulted in 6-34% increase in peak capacity for 50 cm columns compared to lower slurry concentrations and no sonication. For a given analysis time, 50 cm long columns operated at 35 kpsi provided a 20-95% increase in chromatographic peak capacity compared with 15 cm columns operated at 15 kpsi. Analysis times up to 4 h were evaluated, generating peak capacities up to 410 ± 5 (n = 3, measured at 4σ) and identifying 480 ± 85 lipids (n = 2). Importantly, the results also show a correlation between the peak capacity and the number of lipids identified from a human plasma extract. This correlation indicates that ionization suppression is a limiting factor in obtaining sufficient signal for identification by mass spectrometry. The result also shows that the higher resolution obtained by shallow gradients overcomes possible signal reduction due to broader, more dilute peaks in long gradients for improving detection of lipids in LC-MS. Lastly, longer columns operated at shallow gradients allowed for the best separation of both regional and geometrical isomers. These results demonstrate a system that enables the advantages of using longer columns packed and run at ultrahigh pressure for improving lipid separations and lipidome coverage.
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Affiliation(s)
- Matthew J Sorensen
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kelsey E Miller
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - James W Jorgenson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA; Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, USA.
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23
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Pang J, Xiao Q, Yan H, Cao Y, Miao J, Wang S, Li X, Li H, Cheng Z. Bovine Lactoferrin Quantification in Dairy Products by a Simple Immunoaffinity Magnetic Purification Method Coupled with High-Performance Liquid Chromatography with Fluorescence Detection. J Agric Food Chem 2020; 68:892-898. [PMID: 31891506 DOI: 10.1021/acs.jafc.9b06043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study described a simple, specific, and sensitive method using immunoaffinity magnetic purification coupled with high-performance liquid chromatography-fluorescence (HPLC-FL) detection for determination of bovine lactoferrin (bLf) in dairy products. BLf was selectively extracted from dairy products using immunoaffinity beads and then detected by HPLC-FL with its intrinsic fluorescence. During the analysis, standard solutions of bLf were pretreated with Tween 20, an anti-adsorptive agent, for blocking the nonspecific binding of bLf to polypropylene tubes. The calibration curve was linear over the range of 0.8-30 μg mL-1. The validated method was successfully applied to measure bLf at the intact level in dairy products.
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Affiliation(s)
- Jingjing Pang
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Qianqian Xiao
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Han Yan
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Yanqiu Cao
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Junjie Miao
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Simin Wang
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Xinfei Li
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Hao Li
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
| | - Zhongzhe Cheng
- School of Pharmacy , Weifang Medical University , 7166 Baotong West Street , Weifang , Shandong 261053 , China
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24
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Yu Y, Li G, Wu D, Zheng F, Zhang X, Liu J, Hu N, Wang H, Wu Y. Determination of Hydrogen Sulfide in Wines Based on Chemical-Derivatization-Triggered Aggregation-Induced Emission by High-Performance Liquid Chromatography with Fluorescence Detection. J Agric Food Chem 2020; 68:876-883. [PMID: 31670510 DOI: 10.1021/acs.jafc.9b04454] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A chemical-derivatization-triggered aggregation-induced emission (AIE) method for the highly selective determination of hydrogen sulfide (H2S) in wine matrices by high-performance liquid chromatography with fluorescence detection (HPLC-FLD) was developed. The detection strategy was developed based on the chemical derivatization of H2S using a low-cost AIE-active fluorescence derivatization reagent, N-(3-iodine-2-oxopropyl)pyrene methamine (NIPM), to trigger specific AIE at 475 nm, which was red-shifted sharply to the maximum emission wavelength as compared with NIPM monomers of 375 nm, effectively quenching the interference from other thiol-containing compounds. With the aid of specific AIE and the effective separation of HPLC, the proposed method showed high selectivity and sensitivity toward H2S. The limits of detection (LODs) at the sub-nM level of 0.25 nmol/L in the wine-beer sample and 0.30 nmol/L in red wine sample were obtained. To certify its applicability, this proposed strategy was successfully applied for the determination of H2S in wine matrices.
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Affiliation(s)
- Yanxin Yu
- School of Food and Biological Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Guoliang Li
- School of Food and Biological Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
- Key Laboratory of Life-Organic Analysis of Shandong Province , Qufu Normal University , Qufu 273165 , China
| | - Di Wu
- Yangtze Delta Region Institute of Tsinghua University , Zhejiang 314006 , China
| | - Fuping Zheng
- Beijing Laboratory of Food Quality and Safety , Beijing Technology and Business University , Beijing 100048 , China
| | - Xianlong Zhang
- School of Food and Biological Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Jianghua Liu
- School of Food and Biological Engineering , Shaanxi University of Science and Technology , Xi'an 710021 , China
| | - Na Hu
- Key Laboratory of Tibetan Medicine Research & Qinghai Provincial Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology , Chinese Academy of Sciences , Xining 810001 , China
| | - Honglun Wang
- Key Laboratory of Tibetan Medicine Research & Qinghai Provincial Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology , Chinese Academy of Sciences , Xining 810001 , China
| | - Yongning Wu
- NHC Key Laboratory of Food Safety Risk Assessment; Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science , China National Center for Food Safety Risk Assessment , Beijing 100050 , China
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25
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Vocat C, Dunand M, Hubers SA, Bourdillon N, Millet GP, Brown NJ, Wuerzner G, Grouzmann E, Eugster PJ. Quantification of Neuropeptide Y and Four of Its Metabolites in Human Plasma by Micro-UHPLC-MS/MS. Anal Chem 2020; 92:859-866. [PMID: 31790196 PMCID: PMC8541045 DOI: 10.1021/acs.analchem.9b03505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Neuropeptide Y (NPY) is a 36-amino acid peptide circulating at a subpicomolar concentration participating in multiple physiological and pathological processes. NPY is prone to peptidolysis, generating metabolites with modified affinity for the five known receptors of NPY that mediate distinct effects. It is, therefore, crucial to distinguish each metabolite to understand the multiple functions of NPY. Since immunoassays are not able to distinguish NPY from its metabolites, we have validated a microliquid chromatography tandem mass spectrometry (micro-LC-MS/MS) assay for the quantification of endogenous NPY, NPY2-36, NPY3-36, NPY1-35, and NPY3-35 in human plasma. Sample preparation relies on immunoextraction in 96-well plates, followed by solid-phase extraction prior to micro-LC-MS/MS. The LLOQ ranged from 0.03 to 0.16 pM, intra- and inter-assay precision were <27% and trueness <22%. We determined reference intervals in 155 healthy volunteers and 40 hypertensive patients. We found that NPY3-36 is the main circulating peptide in resting conditions and that NPY and catecholamines are simultaneously increased during orthostasis. We also showed that the concentrations of NPY and its metabolites are similar in healthy volunteers and hypertensive patients. NPY is the prototype peptide that circulates in concentrations expected to be beyond instrumental capacities. We have been successful in developing a high-throughput specific and sensitive assay by including a deep knowledge of the physicochemical properties of these peptides to an efficient multistep sample preparation, and a micro-LC chromatography. We believe that our methodological approach opens the possibility to selectively quantify other endogenous peptides cleaved by peptidases whose concentrations are below 1 pM.
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Affiliation(s)
- Céline Vocat
- Service of Clinical Pharmacology, Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
| | - Marielle Dunand
- Service of Clinical Pharmacology, Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
| | - Scott A. Hubers
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Nicolas Bourdillon
- Institute of Sport Sciences (ISSUL), University of Lausanne, 1015 Lausanne, Switzerland
| | - Grégoire P. Millet
- Institute of Sport Sciences (ISSUL), University of Lausanne, 1015 Lausanne, Switzerland
| | - Nancy J. Brown
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Grégoire Wuerzner
- Service of Nephrology and Hypertension, Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
| | - Eric Grouzmann
- Service of Clinical Pharmacology, Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
| | - Philippe J. Eugster
- Service of Clinical Pharmacology, Lausanne University Hospital and University of Lausanne, 1011 Lausanne, Switzerland
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Wang H, Song S, Shao M, Gao Y, Yang C, Li Y, Wang W, He Y, Li P. Determination of bisphenol analogues in food-contact plastics using diode array detector, charged aerosol detector and evaporative light-scattering detector. Ecotoxicol Environ Saf 2019; 186:109778. [PMID: 31627095 DOI: 10.1016/j.ecoenv.2019.109778] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 10/02/2019] [Accepted: 10/06/2019] [Indexed: 06/10/2023]
Abstract
Freshness protection packages and preservative films are widely used food-contact plastic made of polyethylene. Diode array detector (DAD), charged aerosol detector (CAD) and evaporative light-scattering detector (ELSD) were evaluated for determination of 6 bisphenols (bisphenol A, bisphenol S, bisphenol F, bisphenol B, bisphenol AF and tetrabromobisphenol A.) in polyethylene. DAD presented better parameters including limit of quantification (LOQs) ranging from 0.05 to 0.5 μg/g with relative standard deviations (RSDs, n = 5) lower than 1% at two concentration levels. CAD and ELSD are universal detectors with relative consistent response parameters for different analogues which have potential application by using single calibrant for quantification of multiple analytes. Matrix effects were barely observed on three detectors. Samples of freshness protection packages and preservative films were further analyzed and preliminary profiles of bisphenols in products from Beijing market was obtained. Bisphenol S have become most abundant analogue instead of bisphenol A in investigated products.
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Affiliation(s)
- Huiyu Wang
- National Institute of Metrology, China; Tianjin University of Technology, China
| | | | | | - Yan Gao
- National Institute of Metrology, China
| | - Chen Yang
- National Institute of Metrology, China; Tianjin University of Technology, China
| | - Ya Li
- Hunan Institute of Metrology and Testing, China
| | | | - Yajuan He
- National Institute of Metrology, China
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Mandhania S, Pal A, Saharan V. Simultaneous Estimation of Twenty Eight Phenolic Compounds by a Novel and Expeditious Method Developed on Quaternary Ultra-Performance Liquid Chromatography System with a Photodiode Array Detector. Biomolecules 2019; 10:biom10010006. [PMID: 31861330 PMCID: PMC7023218 DOI: 10.3390/biom10010006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/12/2019] [Accepted: 12/16/2019] [Indexed: 11/25/2022] Open
Abstract
Plant secondary metabolites including phenolics and flavonoidsare synthesized through phenylpropanoid and phenylpropanoid–acetate pathways and significantly contribute against adverse effect of abiotic and biotic stresses. Herein, we present the development and execution of a novel and expeditious ultra-performance liquid chromatographic-photodiode array (UPLC–PDA) method for qualitative and quantitative analysis of 28 phenolic compounds comprising of flavonoids, phenolic acids, aldehydes and alcohols. The method is able to separate phenolic compounds in just 17 min with the separation of isobaric species such as 3,4 dihydroxybenzoic acid and 3,5 dihydroxy benzoic acid; quercetin and taxifolin. Linear curves concentrations ranged from 6–18 µg/mL (3,5 dihydroxy benzoic acid), 4–12 µg/mL (catechin and salicylic acid) and 2–6 µg/mL for rest of the compounds and correlation coefficients were >0.994. The limit of detection (LOD) varied from 0.04–0.45 µg/mL. Cotton root samples were used to assess the method in terms of recovery efficiency (85–120%), precision (0.12–4.09%) and intermediate precision (0.32–4.0%).Phenolics and flavonoidsin root samples of healthy and diseased plants as well as leaf samples of healthy plants were successfully quantified using this novel method without an expensive Mass Spectrometer.
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Affiliation(s)
- Shiwani Mandhania
- Cotton Biochemistry Laboratory, Cotton Section, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
- Correspondence:
| | - Ajay Pal
- Department of Biochemistry, College of Basic Sciences and Humanities, CCS Haryana Agricultural University, Hisar, Haryana 125 004, India
| | - Vinod Saharan
- Nano Research Facility Lab, Department of Molecular Biology and Biotechnology, Maharana Pratap University of Agriculture and Technology, Udaipur, Rajasthan 313 001, India
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28
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Zhong JS, Huang Y, Wan JZ, Yu XY, Yu AL, Zeng HX, Chen ZY, Zhou XR, Ding M. Chromatographic studies of unusual on-column degradation of cefaclor observed in the impurity separation by HPLC. J Pharm Biomed Anal 2019; 176:112818. [PMID: 31446297 DOI: 10.1016/j.jpba.2019.112818] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/16/2019] [Accepted: 08/17/2019] [Indexed: 11/18/2022]
Abstract
An unpredictable ghost peak was intermittently observed during the impurity separation of cefaclor and formulation by high performance liquid chromatography (HPLC) with a content from below the reported threshold to approximately 0.3% in different laboratories. Through a series of investigations, the ghost peak was identified as an unusual on-column degradant of cefaclor formed under elevated column temperature but was not an actual sample impurity. The chemical structure of the degradant was determined by spectroscopic methods, including high resolution mass spectrometry (HRMS) and 1H-NMR. Consequently, the unknown peak was identified as a C-4 oxidative decarboxylation analog of cefaclor. The formation mechanism of the analog is proposed, and it is suggested that elevated column temperature during HPLC analysis has a profound effect on the degradation. Dissolved oxygen in the mobile phase may promote the formation of the ghost peak. The degradation can be suppressed by using a column temperature below 30 °C. Moreover, several other prevention measures are suggested based upon the results of the investigation.
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Affiliation(s)
- Jia-Sheng Zhong
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Yan Huang
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Jin-Zhi Wan
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Xiao-Yang Yu
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Ai-Ling Yu
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Huan-Xiang Zeng
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Zhen-Yang Chen
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China
| | - Xiang-Rong Zhou
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China.
| | - Mei Ding
- Research and Development Center, Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd., Shenzhen 518110, PR China.
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29
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Qin F, Huang J, Qiu X, Hu S, Huang X. Quality Control of Modified Xiaoyao San Through the Determination of 22 Active Components by Ultra-Performance Liquid Chromatography. J AOAC Int 2019; 94:1778-84. [PMID: 22320084 DOI: 10.5740/jaoacint.10-422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Abstract
A simple, sensitive, and reliable ultra-performance liquid chromatography (UPLC) method has been developed for simultaneous determination of 22 major constituents in modified xiaoyao san (MXS), a multiherbal formula. The chromatographic separation was performed on an ACQUITY UPLC BEH C18 column (150 × 2.1 mm, 1.7 μm, particle size), with an aqueous 0.5% acetic acid and acetonitrile mobile phase gradient. The method was validated for linearity (r2 >0.9937), intraday and interday precision (RSD <8.51%), recovery (91.18–107.73%), LOD (0.02–4.17 ng/mL), and LOQ (0.05–12.50 ng/mL). The established method was successfully applied to quantify the 22 marker compounds in MXS, which provided a useful basis of overall evaluation of the quality of MXS.
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Affiliation(s)
- Feng Qin
- Sichuan University, Regenerative Medicine Research Center, West China Hospital, Chengdu 610041, People's Republic of China
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30
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Huang X, Zhu B, Jiang T, Yang C, Qiao W, Hou J, Han Y, Xiao H, Chen L. Improved Simple Sample Pretreatment Method for Quantitation of Major Human Milk Oligosaccharides Using Ultrahigh Pressure Liquid Chromatography with Fluorescence Detection. J Agric Food Chem 2019; 67:12237-12244. [PMID: 31560847 DOI: 10.1021/acs.jafc.9b03445] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Human milk oligosaccharides (HMOs) maintain and promote infant health. Most of the current methods for HMOs quantitation require labor-intensive and time-consuming steps for sample preparation. This study presents two very simple and easy-to-operate pretreatment methods, requiring either ultrafiltration or centrifugation to separate free oligosaccharides from whole fat human milk and other milk matrix before oligosaccharides labeling for quantifying HMOs using ultrahigh pressure liquid chromatography with fluorescence detection. A single chromatography run quantified 15 sialylated and neutral HMOs with high sensitivity (with an LOD less than 8 pg for all HMOs tested: about 1 pg for 2'-fucosyllactose, 3-fucosyllactose, 4'-galactosyllactose, 3'-galactosyllactose, and 6'-galactosyllactose) and good linearity with coefficient of correlation above 0.999. Accuracy and precision were satisfactory for both pretreatment methods. Overall, the centrifugation pretreatment was efficient and reliable for samples with high levels of oligosaccharides, and the ultrafiltration pretreatment was especially suitable for samples with low oligosaccharide abundance.
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Affiliation(s)
- Xunwen Huang
- National Engineering Center of Dairy for Maternal and Child Health , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Beijing Engineering Research Center of Dairy , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Institute of Microbiology , China Academy of Sciences , Beijing 100101 , P. R. China
| | - Baoli Zhu
- Institute of Microbiology , China Academy of Sciences , Beijing 100101 , P. R. China
| | - Tiemin Jiang
- National Engineering Center of Dairy for Maternal and Child Health , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Beijing Engineering Research Center of Dairy , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
| | - Chunying Yang
- National Engineering Center of Dairy for Maternal and Child Health , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Beijing Engineering Research Center of Dairy , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
| | - Weicang Qiao
- National Engineering Center of Dairy for Maternal and Child Health , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Beijing Engineering Research Center of Dairy , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
| | - Juncai Hou
- College of Food Science , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yanhui Han
- Department of Food Science , University of Massachusetts , Amherst , Massachusetts 010003 , United States
| | - Hang Xiao
- Department of Food Science , University of Massachusetts , Amherst , Massachusetts 010003 , United States
| | - Lijun Chen
- National Engineering Center of Dairy for Maternal and Child Health , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
- Beijing Engineering Research Center of Dairy , Beijing Sanyuan Foods Co. Ltd. , Beijing 100163 , P. R. China
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31
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Wang J, Li W, Xiao J, Ni B, Li J, Wu J, Zhang Q. Hydroxyapatite-embedded monolithic column for selective on-line solid-phase extraction of adenosine triphosphate and its phosphorylated metabolites. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1128:121769. [PMID: 31476577 DOI: 10.1016/j.jchromb.2019.121769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 07/19/2019] [Accepted: 08/18/2019] [Indexed: 01/03/2023]
Abstract
A novel hydroxyapatite-embedded monolithic column has been facilely prepared in a stainless-steel column with inner diameter of 2.1 mm by the strong adhesion of urea-formaldehyde (UF) resin and exploited as a sorbent for selective on-line solid-phase extraction (on-line SPE) of adenosine triphosphate and its phosphorylated metabolites. The composition for this preparation, including the amount of hydroxyapatite nanopowders and the porogen were investigated to obtain a suitable monolith with large surface area and satisfactory permeability. Owing to anion exchange interaction of hydroxyapatite and hydrophilic interaction of UF monolithic matrix, the prepared monolith showed good extraction efficiency and selectivity towards these phosphorylated analytes. Several parameters for on-line SPE, including ACN percentage in the sampling solution, collection time span, salt concentration of the eluent, sampling and elution flow rate, were optimized with respect to the extraction efficiencies of the target compounds. Under the optimized conditions, the LODs of the analytes were in the range of 0.01-0.04 μg/g, the recoveries in the spiked samples ranged from 78.3%-92.5% with RSDs <4.7%. Due to the excellent extraction ability towards phosphorylated compounds in practical samples, a simple on-line SPE-HPLC method using hydroxyapatite-embedded monolith as sorbent has been proposed for monitoring freshness of grass carp.
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Affiliation(s)
- Jiabin Wang
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China.
| | - Wenbang Li
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
| | - Jianhua Xiao
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
| | - Bichen Ni
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
| | - Jianhua Li
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
| | - Jiulin Wu
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
| | - Qiqing Zhang
- Institute of Biomedical and Pharmaceutical Technology, Fuzhou University, Fuzhou 350002, China
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32
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Zhang YY, Liu YX, Zhou Z, Zhou DY, Du M, Zhu BW, Qin L. Improving Lipidomic Coverage Using UPLC-ESI-Q-TOF-MS for Marine Shellfish by Optimizing the Mobile Phase and Resuspension Solvents. J Agric Food Chem 2019; 67:8677-8688. [PMID: 31293164 DOI: 10.1021/acs.jafc.9b01343] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reversed-phase ultrahigh-performance-liquid chromatography-mass spectrometry (UPLC-MS) is the typical method for the lipidomic analysis of most of biological samples, which was rarely used for the comprehensive lipidomic analysis of marine shellfish. Thus, a range of columns, modifiers, and resuspension solvents were evaluated using UPLC-electrospray ionization-quadrupole time-of-flight-MS to facilitate the ionization efficiency in both the positive and negative electrospray ionization (ESI(+)/(-)) modes for abalone lipids. Optimal lipidomic coverage was acquired with 10 mM ammonium formate in both ESI(+)/(-) modes. The selected resuspension solvents also influenced ionization efficiency through the matrix effect, and resuspension in methanol enhanced the signal intensities by reducing ion suppression. Because of the higher glycerophospholipid content in shellfish, bridged ethylene hybrid C8 columns showed clear advantages over charged surface hybrid C18 columns. A series of glycerophospholipids, lyso-glycerophospholipids, glycerolipids, and fatty acids in different shellfish can be annotated and semiquantified in one injection by the optimized method.
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Affiliation(s)
- Yu-Ying Zhang
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Yu-Xi Liu
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Zheng Zhou
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Da-Yong Zhou
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Ming Du
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Bei-Wei Zhu
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
| | - Lei Qin
- National Engineering Research Center of Seafood, School of Food Science and Technology , Dalian Polytechnic University , Dalian 116034 , China
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33
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Yang Y, Zhu R, Li J, Yang X, He J, Wang H, Chang Y. Separation and Enrichment of Three Coumarins from Angelicae Pubescentis Radix by Macroporous Resin with Preparative HPLC and Evaluation of Their Anti-Inflammatory Activity. Molecules 2019; 24:molecules24142664. [PMID: 31340484 PMCID: PMC6680787 DOI: 10.3390/molecules24142664] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/18/2019] [Accepted: 07/21/2019] [Indexed: 01/17/2023] Open
Abstract
In order to enrich and separate three coumarins (columbianetin acetate, osthole and columbianadin) from Angelicae Pubescentis Radix (APR), an efficient method was established by combining macroporous resins (MARs) with preparative high-performance liquid chromatography (PHPLC). Five different macroporous resins (D101, AB-8, DA-201, HP-20 and GDX-201) were used to assess the adsorption and desorption characteristics of three coumarins. The result demonstrated that HP-20 resin possessed the best adsorption and desorption capacities for these three coumarins. Moreover, the adsorption dynamics profiles of three coumarins were well fitted to the pseudo second order equation (R2 > 0.99) for the HP-20 resin. The adsorption process was described by the three isotherms models including Langmuir (R2 > 0.98, 0.046 ≤ RL ≤ 0.103), Freundlich (R2 > 0.99, 0.2748 ≤ 1/n ≤ 0.3103) and Dubinin Radushkevich (R2 > 0.97). The contents of columbianetin acetate, osthole and columbianadin in the product were increased 10.69-fold, 19.98-fold and 19.68-fold after enrichment, respectively. Three coumarins were further purified by PHPLC and the purities of them reached above 98%. Additionally, the anti-inflammatory effects of these three coumarins were assessed by Lipopolysaccharide (LPS)-induced RAW 264.7 cells. It was found that the production of NO and MCP-1 was obviously inhibited by three coumarins. Columbianetin acetate, osthole and columbianadin could be used as potentially natural anti-inflammatory ingredients in pharmaceutical products. It was concluded that the new method combining MARs with PHPLC was efficient and economical for enlarging scale separation and enrichment of columbianetin acetate, osthole and columbianadin with anti-inflammatory effect from the APR extract.
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Affiliation(s)
- Yuqiao Yang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Ruichao Zhu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Jin Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Xuejing Yang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Jun He
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Hui Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Yanxu Chang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
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Luo L, Tan M, Luo Y. Determination of related substances in ketoprofen injection by RP-HPLC method. Pak J Pharm Sci 2019; 32:1607-1614. [PMID: 31608880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The paper aims to establish a RP-HPLC method for the simultaneous determination of six related substances in ketoprofen injection. The separation was performed on a VP-ODS C18 column (4.6mm×250mm, 5μm) with the mobile phase of 6.8% phosphate buffer solution (adjusted to pH3.5 with 85% phosphoric acid)-acetonitrile-water (2:43:55,v/v/v) at a flow rate of 1.2mL•min-1. The detection wavelength and the injection volume were set at 233nm and 20μL, respectively. Impurity A and C were calculated by external standard method. Main component self-compare method with calibration factor was used to calculate impurity B, D, E, F and main component self-compare method without calibration factor was used to calculate unspecified impurity. Related substances and degraded substances were completely separated from ketoprofen. For impurity A and C, the linear range of determination were separately 0.06 μg•mL-1 ~ 3.6μg•mL-1 and 0.036μg•mL-1 ~ 2.4μg•mL-1 with the correlation coefficient of 0.9999. The average recoveries (n=9) were 98.13% (RSD=0.35%) and 96.32% (RSD=0.43%). The precision and repeatability for method were good. With reference to ketoprofen (retention time =10.06 min), the relative retention time of impurity B, D, E, F were 0.71, 1.46, 0.59, 2.13, respectively, and the relative correction factors were 0.962, 0.938, 0.957, 0.960, respectively. Finally, determined that the contents of impurity A could not be more than 0.3%, any of the contents of impurity B, C, D, E, F and unspecified impurities could not be more than 0.2%, sum of the contents of impurities other than A and C couldn't be more than 0.5%. The method was proved to be simple, rapid, accurate, sensitive and suitable for the simultaneous determination of six related substances in ketoprofen injection.
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Affiliation(s)
- Lei Luo
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Mingguo Tan
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Yonghuang Luo
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
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Han Y, Du J, Li J, Li M. Quantification of the Organic Acids in Hawthorn Wine: A Comparison of Two HPLC Methods. Molecules 2019; 24:molecules24112150. [PMID: 31181607 PMCID: PMC6600212 DOI: 10.3390/molecules24112150] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 05/27/2019] [Accepted: 06/06/2019] [Indexed: 11/16/2022] Open
Abstract
Hawthorn wine is rich in anthocyanins, polyphenols, flavonoids and other macromolecular substances, which results in difficulty to rapidly determine organic acids in the wine. An enzymatic method is accurate but expensive and not able to quantify all of the organic acids simultaneously. Therefore, in this study, two HPLC methods were applied to quantify the organic acids in the wine with the enzymatic method as a reference. Seven organic acids were found with the enzymatic method including citric, succinic, l-malic, acetic, lactic, pyruvic, and fumaric acids, in which citric and succinic acid accounted for more than 80% of the total acids. By an 87H column equipped with DAD (diode array) detector at 215 nm (HPLC method 1), only citric and lactic acids were quantified accurately and the elution period was shortened from 100 min to 20 min by removing the impurity in the sample with a LC-18 SPE(solid-phase extraction) tube. While citric, succinic, l-malic, acetic, pyruvic, and fumaric acids were quantified reliably by a dC18 column equipped with DAD detector at 210 nm (HPLC method 2), with the sample requires only dilution and filtration before injection. It was suggested that HPLC method 2 was an effective method to quantify the organic acids in hawthorn wine. The method provides a choice for accurate quantification of organic acids in hawthorn wine or other drinks, and would be helpful for controlling the quality of hawthorn wine.
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Affiliation(s)
- Yingying Han
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
| | - Jinhua Du
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
| | - Jie Li
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
| | - Miaomiao Li
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
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Rifflet A, Filali S, Chenau J, Simon S, Fenaille F, Junot C, Carniel E, Becher F. Quantification of low abundance Yersinia pestis markers in dried blood spots by immuno-capture and quantitative high-resolution targeted mass spectrometry. Eur J Mass Spectrom (Chichester) 2019; 25:268-277. [PMID: 31096787 DOI: 10.1177/1469066718795978] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plague, caused by the bacterium Yersinia pestis, is still present in several countries worldwide. Besides, Y. pestis has been designated as Tier 1 agent, the highest rank of bioterrorism agents. In this context, reliable diagnostic methods are of great importance. Here, we have developed an original workflow based upon dried blood spot for simplified sampling of clinical specimens, and specific immuno-mass spectrometry monitoring of Y. pestis biomarkers. Targeted proteins were selectively enriched from dried blood spot extracts by multiplex immunocapture using antibody-coated magnetic beads. After accelerated on-beads digestion, proteotypic peptides were monitored by multiplex LC-MS/MS through the parallel reaction monitoring mode. The DBS-IC-MS assay was designed to quantify both F1 and LcrV antigens, although 10-fold lower sensitivity was observed with LcrV. The assay was successfully validated for F1 with a lower limit of quantification at 5 ng·mL-1 in spiked blood, corresponding to only 0.1 ng on spots. In vivo quantification of F1 in blood and organ samples was demonstrated in the mouse model of pneumonic plague. The new assay could help to simplify the laboratory confirmation of positive point of care F1 dipstick.
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Affiliation(s)
- Aline Rifflet
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Sofia Filali
- 2 Yersinia Research Unit, Institut Pasteur, Paris, France
| | - Jérôme Chenau
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Stéphanie Simon
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - François Fenaille
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | - Christophe Junot
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
| | | | - François Becher
- 1 Service de Pharmacologie et d'Immunoanalyse (SPI), CEA, INRA, Université Paris-Saclay, Gif sur Yvette, France
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Sontag G, Pinto MI, Noronha JP, Burrows HD. Analysis of Food by High Performance Liquid Chromatography Coupled with Coulometric Detection and Related Techniques: A Review. J Agric Food Chem 2019; 67:4113-4144. [PMID: 30900882 DOI: 10.1021/acs.jafc.9b00003] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The development of single coulometric cells in combination with high performance liquid chromatography to dual cells and to the coulometric electrode array detector is described. An overview is given about the application of these methods in food chemistry. Easily oxidizable compounds, such as phenolic substances, pesticides, or vitamins, can be determined, as well as substances with high oxidation potentials or electroinactive compounds. Substances exhibiting poor electrochemical activity can be transformed to electroactive compounds by precolumn derivatization, postcolumn photochemical reactions, postcolumn enzyme reactors, or by using the oxidative/reductive mode for coulometric electrode array detection. Furthermore, it is shown that the interesting combination of high performance liquid chromatography with electrochemistry and mass spectrometry has opened further possibilities with respect to interpretation of redox reactions, drug metabolism studies, metabolomics, and electrochemical derivatization.
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Affiliation(s)
- Gerhard Sontag
- Institute for Analytical Chemistry , University of Vienna , Währingerstrasse 38 , A-1090 Vienna , Austria
| | - Maria I Pinto
- REQUIMTE/LAQV, Chemistry Department, FCT , Universidade Nova de Lisboa , 2829-516 Caparica , Portugal
| | - João P Noronha
- REQUIMTE/LAQV, Chemistry Department, FCT , Universidade Nova de Lisboa , 2829-516 Caparica , Portugal
| | - Hugh D Burrows
- Centro de Quimica, Chemistry Department , University of Coimbra , 3004-535 Coimbra , Portugal
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Ispiryan L, Heitmann M, Hoehnel A, Zannini E, Arendt EK. Optimization and Validation of an HPAEC-PAD Method for the Quantification of FODMAPs in Cereals and Cereal-Based Products. J Agric Food Chem 2019; 67:4384-4392. [PMID: 30915837 DOI: 10.1021/acs.jafc.9b00382] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study presents an analytical method for the quantification of fermentable oligo-, di-, and monosaccharides and polyols (FODMAPs) in cereals and cereal-based products, considering diverse ingredients, such as different cereals in addition to wheat, pulses, or pseudocereals. All carbohydrates have been separated, identified, and quantified with a high-performance anion-exchange chromatographic system coupled with a pulsed amperometric detection (HPAEC-PAD). The total fructan content and the average degree of polymerization (DPav) have been determined after enzymatic hydrolysis to the monomers glucose and fructose, on the basis of the principle of the official method for fructan quantification in food products, AOAC 997.08. The methods for extraction, separation, and detection as well as fructan determination are based on several other studies and were modified in order to minimize interferences in the analysis. The method has been validated with regard to the limits of detection and quantification, the linearity, the repeatability, and the accuracy as well as the DPav of the fructans.
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Affiliation(s)
- Lilit Ispiryan
- Food and Nutritional Sciences , University College Cork , College Road , Cork T12Y337 , Ireland
| | - Mareile Heitmann
- Food and Nutritional Sciences , University College Cork , College Road , Cork T12Y337 , Ireland
| | - Andrea Hoehnel
- Food and Nutritional Sciences , University College Cork , College Road , Cork T12Y337 , Ireland
| | - Emanuele Zannini
- Food and Nutritional Sciences , University College Cork , College Road , Cork T12Y337 , Ireland
| | - Elke K Arendt
- Food and Nutritional Sciences , University College Cork , College Road , Cork T12Y337 , Ireland
- APC Microbiome Ireland , Cork T12YT20 , Ireland
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Zhou X, Yi M, Ding L, He S, Yan X. Isolation and Purification of a Neuroprotective Phlorotannin from the Marine Algae Ecklonia maxima by Size Exclusion and High-Speed Counter-Current Chromatography. Mar Drugs 2019; 17:E212. [PMID: 30987394 PMCID: PMC6521176 DOI: 10.3390/md17040212] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/01/2019] [Accepted: 04/03/2019] [Indexed: 02/07/2023] Open
Abstract
Phlorotannins are polyphenolic metabolites of marine brown algae that have been shown to possess health-beneficial biological activities. An efficient approach using a combination of high-speed counter-current chromatography (HSCCC) and size exclusion chromatography with a Sephadex LH-20 has been successfully developed for the isolation and purification of a neuroprotective phlorotannin, eckmaxol, from leaves of the marine brown algae, Ecklonia maxima. The phlorotannin of interest, eckmaxol, was isolated with purity >95% by HSCCC using an optimized solvent system composed of n-hexane-ethyl acetate-methanol-water (2:8:3:7, v/v/v/v) after Sephadex LH-20 size exclusion chromatography. This compound was successfully purified in the quantity of 5.2 mg from 0.3 kg of the E. maxima crude organic extract. The structure of eckmaxol was identified and assigned by NMR spectroscopic and mass spectrometric analyses. The purification method developed for eckmaxol will facilitate the further investigation and development of this neuroprotective agent as a drug lead or pharmacological probe. Furthermore, it is suggested that the combination of HSCCC and size exclusion chromatography could be more widely applied for the isolation and purification of phlorotannins from marine algae.
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Affiliation(s)
- Xuezhen Zhou
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China.
| | - Mengqi Yi
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China.
| | - Lijian Ding
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China.
| | - Shan He
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China.
| | - Xiaojun Yan
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China.
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Setyaningsih W, Saputro IE, Carrera CA, Palma M, García-Barroso C. Fast Determination of Phenolic Compounds in Rice Grains by Ultraperformance Liquid Chromatography Coupled to Photodiode Array Detection: Method Development and Validation. J Agric Food Chem 2019; 67:3018-3027. [PMID: 30761903 DOI: 10.1021/acs.jafc.8b05430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There are several phenolic compounds in rice grains providing benefits for human health. The concentration of phenolic compounds in rice is strongly affected by the polishing steps during rice production. A new sensitive ultraperformance liquid chromatography-ultraviolet-visible spectroscopy method with a photodiode array detection protocol has been developed and validated for the quantitation of phenolic compounds in rice grains. Several working variables and two different columns were evaluated. Finally, a less than 3 min analysis time was developed to achieve enough resolution for the simultaneous determination of the 20 most common phenolic compounds in rice. The analytical properties for the separation method produced an adequate sensitivity for all phenolic compounds in the regular range for phenolics in rice, 0.5-100 mg L-1 ( R2 > 0.997), with high precisions for both repeatability and intermediate precisions (coefficients of variation less than 0.4 and 2.5% for the retention time and area of the peaks, respectively).
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Affiliation(s)
- W Setyaningsih
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology , Universitas Gadjah Mada , Jalan Flora , Bulaksumur, Yogyakarta 55281 , Indonesia
| | - I E Saputro
- Department of Analytical Chemistry, Faculty of Sciences, IVAGRO , University of Cádiz , Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro , 11510 Puerto Real , Cádiz , Spain
| | - C A Carrera
- Department of Analytical Chemistry, Faculty of Sciences, IVAGRO , University of Cádiz , Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro , 11510 Puerto Real , Cádiz , Spain
| | - M Palma
- Department of Analytical Chemistry, Faculty of Sciences, IVAGRO , University of Cádiz , Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro , 11510 Puerto Real , Cádiz , Spain
| | - C García-Barroso
- Department of Analytical Chemistry, Faculty of Sciences, IVAGRO , University of Cádiz , Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro , 11510 Puerto Real , Cádiz , Spain
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Linscheid MW. Molecules and elements for quantitative bioanalysis: The allure of using electrospray, MALDI, and ICP mass spectrometry side-by-side. Mass Spectrom Rev 2019; 38:169-186. [PMID: 29603315 DOI: 10.1002/mas.21567] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/12/2018] [Indexed: 06/08/2023]
Abstract
To understand biological processes, not only reliable identification, but quantification of constituents in biological processes play a pivotal role. This is especially true for the proteome: protein quantification must follow protein identification, since sometimes minute changes in abundance tell the real tale. To obtain quantitative data, many sophisticated strategies using electrospray and MALDI mass spectrometry (MS) have been developed in recent years. All of them have advantages and limitations. Several years ago, we started to work on strategies, which are principally capable to overcome some of these limits. The fundamental idea is to use elemental signals as a measure for quantities. We began by replacing the radioactive 32 P with the "cold" natural 31 P to quantify modified nucleotides and phosphorylated peptides and proteins and later used tagging strategies for quantification of proteins more generally. To do this, we introduced Inductively Coupled Plasma Mass Spectrometry (ICP-MS) into the bioanalytical workflows, allowing not only reliable and sensitive detection but also quantification based on isotope dilution absolute measurements using poly-isotopic elements. The detection capability of ICP-MS becomes particularly attractive with heavy metals. The covalently bound proteins tags developed in our group are based on the well-known DOTA chelate complex (1,4,7,10-tetraazacyclododecane-N,N',N″,N‴-tetraacetic acid) carrying ions of lanthanoides as metal core. In this review, I will outline the development of this mutual assistance between molecular and elemental mass spectrometry and discuss the scope and limitations particularly of peptide and protein quantification. The lanthanoide tags provide low detection limits, but offer multiplexing capabilities due to the number of very similar lanthanoides and their isotopes. With isotope dilution comes previously unknown accuracy. Separation techniques such as electrophoresis and HPLC were used and just slightly adapted workflows, already in use for quantification in bioanalysis. Imaging mass spectrometry (MSI) with MALDI and laser ablation ICP-MS complemented the range of application in recent years.
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MESH Headings
- Animals
- Chelating Agents/chemistry
- Chromatography, High Pressure Liquid/instrumentation
- Chromatography, High Pressure Liquid/methods
- Heterocyclic Compounds, 1-Ring/chemistry
- Humans
- Lanthanoid Series Elements/chemistry
- Nucleotides/analysis
- Proteins/analysis
- Spectrometry, Mass, Electrospray Ionization/instrumentation
- Spectrometry, Mass, Electrospray Ionization/methods
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/instrumentation
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/methods
- Workflow
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Li L, Kong J, Yao CH, Liu XF, Liu JH. Rapid identification of urokinase plasminogen activator inhibitors from Traditional Chinese Medicines based on ultrafiltration, LC-MS and in silico docking. J Pharm Biomed Anal 2019; 164:241-248. [PMID: 30396051 DOI: 10.1016/j.jpba.2018.10.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 09/27/2018] [Accepted: 10/21/2018] [Indexed: 02/06/2023]
Abstract
The urokinase plasminogen activator (uPA) is regarded as the crucial trigger for plasmin generation, which is involved in several diseases especially for neoplasm metastasis. In this study, an efficient approach integrating ultrafiltration, LC/MS, bioassay and in silico docking, was proposed for rapidly detecting uPA ligands from Traditional Chinese Medicines (TCMs). Forty-two TCMs were initially assessed, and as illustrative case studies, Galla Chinensis and Sanguisorbae Radix, which appeared significant inhibitory activities on uPA, were chosen to develpe and verify the strategy. A total of seven uPA ligands were successfully detected and identified. Two of them, pentagalloylglucose and 28-O-β-d-glucopyranosyl pomolic acid, were demonstrated to be potential inhibitors, with IC50 at 1.639 μM and 37.82 μM repectively. Furthermore, a combinatorial compound library screening combined with in silico docking assay, was revealed that ursolic acid (IC50 = 2.623 μM) was also speculated to be a potent parent structure for inhibition of uPA. This approach offers a multidimensional perspective to discover uPA-binding leading compounds from TCMs or other complex mixtures, which would provide an efficient route for drug discovery.
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Affiliation(s)
- Li Li
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Jing Kong
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Chun-Hua Yao
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Xiu-Feng Liu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China.
| | - Ji-Hua Liu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China.
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Surendran S, Paul D, Pokharkar S, Choulwar S, Deshpande A, Giri S, Satheeshkumar N. Novel Bruton tyrosine kinase inhibitor acalabrutinib quantification by validated LC-MS/MS method: An application to pharmacokinetic study in Sprague Dawley rats. J Pharm Biomed Anal 2019; 164:509-513. [PMID: 30453157 DOI: 10.1016/j.jpba.2018.11.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/18/2018] [Accepted: 11/05/2018] [Indexed: 12/29/2022]
Abstract
USFDA has approved a novel Bruton tyrosine kinase (BTK) inhibitor acalabrutinib (ACA) for the treatment of mantle cell lymphoma in adults. ACA is more potent and selective with fewer side effects compared to other Bruton tyrosine kinase inhibitors. In the current work a highly sensitive, selective and specific LC-MS/MS method for the estimation of acalabrutinib (ACA) in rat plasma was developed. Agilent Eclipse Plus C 8 column (50 mm × 4.6 mm, μm), with gradient elution using 10 mM ammonium formate and acetonitrile as mobile phase at a flow rate of 0.6 mL/min was used for the chromatographic separation. The ion transitions were quantified in positive mode with MRM transition of 466.1→372.3 for ACA and 236.8→194.0 for internal standard (IS). Solid phase extraction process was used as sample preparation approach. The method was validated according to USFDA bioanalytical guidelines. The method provided good linearity over the range of 0.2-199.14 ng/mL for ACA with short run time of 4 min. The method offers very high sensitivity (0.2 ng/mL) and was free from matrix interferences. The validated LC-MS/MS method was successfully applied for in vivo pharmacokinetic study in Sprague Dawley rats. The Cmax of ACA was found to be 25.56 ng/mL reaching at time of 0.5 h. The developed analytical method can also be utilized for bioequivalence studies and/or for pharmacokinetic studies in clinics.
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Affiliation(s)
- Shruti Surendran
- Drug Metabolism and Interactions Research Lab, Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - David Paul
- Drug Metabolism and Interactions Research Lab, Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Sunil Pokharkar
- Drug Metabolism and Pharmacokinetic Department, Aurigene Discovery Technologies Limited, Bollaram Road, Miyapur, Hyderabad, 500049, Telangana, India
| | - Sagar Choulwar
- Drug Metabolism and Pharmacokinetic Department, Aurigene Discovery Technologies Limited, Bollaram Road, Miyapur, Hyderabad, 500049, Telangana, India
| | - Abhijeet Deshpande
- Drug Metabolism and Pharmacokinetic Department, Aurigene Discovery Technologies Limited, Bollaram Road, Miyapur, Hyderabad, 500049, Telangana, India
| | - Sanjeev Giri
- Drug Metabolism and Pharmacokinetic Department, Aurigene Discovery Technologies Limited, Bollaram Road, Miyapur, Hyderabad, 500049, Telangana, India.
| | - N Satheeshkumar
- Drug Metabolism and Interactions Research Lab, Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India.
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Cui C, Chen R, Jiang J, Liu R, Wang W, Zhao Q, Hu P. Simultaneous determination of FLZ and its metabolite (M1) in human plasma and urine by UHPLC-MS/MS: Application to a pharmacokinetic study. J Pharm Biomed Anal 2019; 164:32-40. [PMID: 30342394 DOI: 10.1016/j.jpba.2018.10.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 11/19/2022]
Abstract
FLZ is a novel anti-Parkinson's disease candidate drug. The main active metabolite is FLZ O-dealkylation (M1) in preclinical studies. A reliable ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) quantitation method was developed for the simultaneous determination of FLZ and M1 with low limits of quantitation in human plasma (0.1 ng/mL) and urine (0.5 ng/mL). The plasma and urine samples were both purified by full-automatic solid phase extraction (SPE) method with ensured high extraction recovery and little matrix effect for both analytes, and then separated on a BEH C18 column (2.1 × 50 mm, 1.7 μm). Detection and quantification were performed using an electrospray ionization (ESI) source in positive mode by multiple reaction monitoring (MRM). The precursor to product ion transitions were monitored at m/z 450.3+→313.2+ for FLZ, m/z 436.3+→299.1+ for M1, m/z 462.6+→142.0+ for [D12]-FLZ (internal standard of FLZ) and m/z 447.2+→125.2+ for [D11]-M1 (internal standard of M1), respectively. This method showed good linearity, accuracy, precision and stability in the range of 0.1-100 ng/mL in plasma and 0.5-500 ng/mL in urine of two analytes. Finally, the developed method was successfully applied to a pharmacokinetic research in Chinese healthy volunteers after oral administration of FLZ tablets.
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Affiliation(s)
- Cheng Cui
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100032, PR China; Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, PR China
| | - Rui Chen
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100032, PR China; Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, PR China
| | - Ji Jiang
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100032, PR China; Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, PR China
| | - Rui Liu
- Hebei Yiling Pharmaceutical Co., Ltd., Hebei, 050035, PR China
| | - Wei Wang
- Hebei Yiling Pharmaceutical Co., Ltd., Hebei, 050035, PR China
| | - Qian Zhao
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100032, PR China; Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, PR China.
| | - Pei Hu
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100032, PR China; Beijing Key Laboratory of Clinical PK and PD Investigation for Innovative Drugs, PR China.
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45
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Li C, Zhu L, Yang W, He X, Zhao S, Zhang X, Tang W, Wang J, Yue T, Li Z. Amino-Functionalized Al-MOF for Fluorescent Detection of Tetracyclines in Milk. J Agric Food Chem 2019; 67:1277-1283. [PMID: 30640455 DOI: 10.1021/acs.jafc.8b06253] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A fluorescent method for detection of tetracyclines (TCs) in milk was developed by using the NH2-MIL-53(Al) nanosensor synthesized via a one-pot hydrothermal method. The nanosensor had a crystalline nanoplates structure with rich groups of -NH2 and -COOH. The -NH2/-COOH of NH2-MIL-53(Al) reacted with the -CO-/-OH of TCs to form a complex. The electron of -NH2/-COOH from the NH2-BDC ligand transferred to the -CO-/-OH of TCs. -NH2 of the NH2-MIL-53(Al) interacted with the -CO-/-OH of TCs by hydrogen bonding. The quenching efficiency of the inner filter effect (IFE) was calculated to contribute 57-89%. The synergistic effect of photoinduced electron transfer (PET) and IFE account for fluorescence quenching. TCs were quantitatively detected in milk samples with recoveries of 85.15-112.13%; the results were in great accordance with high-performance liquid chromatography (HPLC) ( P > 0.05), confirming the NH2-MIL-53(Al) nanosensor has potential applicability for the detection of TCs in food matrix.
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Affiliation(s)
- Chunhua Li
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Li Zhu
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Weixia Yang
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Xie He
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Sheliang Zhao
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Xiaoshuo Zhang
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Wenzhi Tang
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Jianlong Wang
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
| | - Tianli Yue
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture , Yangling , Shaanxi 712100 , China
- National Engineering Research Center of Agriculture Integration Test (Yangling) , Yangling , Shaanxi 712100 , China
| | - Zhonghong Li
- College of Food Science and Engineering , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture , Yangling , Shaanxi 712100 , China
- National Engineering Research Center of Agriculture Integration Test (Yangling) , Yangling , Shaanxi 712100 , China
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46
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Zhang W, Zhang D, Chen Q, Wu J, Ouyang Z, Xia Y. Online photochemical derivatization enables comprehensive mass spectrometric analysis of unsaturated phospholipid isomers. Nat Commun 2019. [PMID: 30622271 DOI: 10.1038/s41467-01807963-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Mass spectrometry-based lipidomics is the primary tool for the structural analysis of lipids but the effective localization of carbon-carbon double bonds (C=C) in unsaturated lipids to distinguish C=C location isomers remains challenging. Here, we develop a large-scale lipid analysis platform by coupling online C=C derivatization through the Paternò-Büchi reaction with liquid chromatography-tandem mass spectrometry. This provides rich information on lipid C=C location isomers, revealing C=C locations for more than 200 unsaturated glycerophospholipids in bovine liver among which we identify 55 groups of C=C location isomers. By analyzing tissue samples of patients with breast cancer and type 2 diabetes plasma samples, we find that the ratios of C=C isomers are much less affected by interpersonal variations than their individual abundances, suggesting that isomer ratios may be used for the discovery of lipid biomarkers.
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Affiliation(s)
- Wenpeng Zhang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry and State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Donghui Zhang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry and State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
| | - Qinhua Chen
- Affiliated Dongfeng Hospital, Hubei University of Medicine, Shiyan, Hubei Province, 442000, China
| | - Junhan Wu
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry and State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
| | - Zheng Ouyang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry and State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China.
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, USA.
| | - Yu Xia
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry and State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China.
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, USA.
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47
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Abstract
L-Pyroglutamic acid succinimidyl ester (L-PGA-OSu) and its isotopic variant (L-PGA[d5]-OSu) were synthesized and used as the chiral labeling reagents for the enantioseparation of amino acids by reversed-phase UPLC-ESI-MS/MS. The enantiomers of amino acids were labeled with the reagents at 60 °C for 10 min in an alkaline medium. The resulting diastereomers were well separated by the reversed-phase chromatography using an ODS column, packed with small particles (1.7 μm) (Rs = 1.95-8.05). A highly sensitive detection at a low-fmol level (0.5-3.2 fmol) was obtained from the selected reaction monitoring (SRM) chromatograms. An isotope labeling strategy using light and heavy variants for the differential analysis of the DL-amino acids in different sample groups is also presented in this paper. The ratios of D/L-alanine in different yogurt products were successfully determined by the proposed method. The D/L ratios were almost comparable to those obtained from only using light reagent (i.e., L-PGA-OSu). Therefore, the proposed strategy seems to be useful for the differential analysis of DL-amino acids, not only in food products but also in biological samples.
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Affiliation(s)
- Toshimasa Toyo'oka
- Laboratory of Analytical and Bio-Analytical Chemistry, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan.
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48
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Najdekr L, Blanco GR, Dunn WB. Collection of Untargeted Metabolomic Data for Mammalian Urine Applying HILIC and Reversed Phase Ultra Performance Liquid Chromatography Methods Coupled to a Q Exactive Mass Spectrometer. Methods Mol Biol 2019; 1996:1-15. [PMID: 31127542 DOI: 10.1007/978-1-4939-9488-5_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ultra performance liquid chromatography-mass spectrometry (UPLC-MS) is the most frequently applied analytical platform in the untargeted metabolomic study of mammalian urine. Here we describe two complementary UPLC-MS methods for metabolomic analysis or urine, a reversed phase C18 method and a hydrophilic interaction liquid chromatography (HILIC) method. We discuss the inclusion of pooled quality control (QC) samples and a recommended analysis list construction. Up to 96 injections can be performed every 24 h, and up to 2000 metabolites can be routinely detected.
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Affiliation(s)
- Lukáš Najdekr
- School of Biosciences, University of Birmingham, Birmingham, UK.
- Phenome Centre Birmingham, University of Birmingham, Birmingham, UK.
| | | | - Warwick B Dunn
- School of Biosciences, University of Birmingham, Birmingham, UK
- Phenome Centre Birmingham, University of Birmingham, Birmingham, UK
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
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49
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Abstract
Capillary electrophoresis coupled to mass spectrometry is an analytical platform ideal for the analysis of ionic or polar metabolites. It constitutes a perfect complement to reversed-phase liquid chromatography, offering a good alternative to polar stationary phases where reproducibility is not guaranteed. Herein, we describe a robust standardized methodology for the fingerprinting analysis of Leishmania, a taxonomic genus which comprises more than 20 protozoa species.
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MESH Headings
- Chromatography, High Pressure Liquid/instrumentation
- Chromatography, High Pressure Liquid/methods
- Chromatography, Reverse-Phase/instrumentation
- Chromatography, Reverse-Phase/methods
- Electrophoresis, Capillary/instrumentation
- Electrophoresis, Capillary/methods
- Leishmania/metabolism
- Metabolomics/instrumentation
- Metabolomics/methods
- Reproducibility of Results
- Spectrometry, Mass, Electrospray Ionization/instrumentation
- Spectrometry, Mass, Electrospray Ionization/methods
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Affiliation(s)
- David Rojo
- Centro de Metabolómica y Bioanállisis (CEMBIO), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Madrid, Spain
| | - Coral Barbas
- Centro de Metabolómica y Bioanállisis (CEMBIO), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Madrid, Spain
| | - Ángeles López-Gonzálvez
- Centro de Metabolómica y Bioanállisis (CEMBIO), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Madrid, Spain.
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50
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Whitten AE, Jarrott RJ, Hu SH, Duff AP, King GJ, Martin JL, Christie MP. Studying Munc18:Syntaxin Interactions Using Small-Angle Scattering. Methods Mol Biol 2019; 1860:115-144. [PMID: 30317501 DOI: 10.1007/978-1-4939-8760-3_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The interaction between the soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) protein syntaxin (Sx) and regulatory partner Sec/Munc18 (SM) protein is a critical step in vesicle fusion. The exact role played by SM proteins, whether positive or negative, has been the topic of much debate. High-resolution structures of the SM:Sx complex have shown that SM proteins can bind syntaxin in a closed fusion incompetent state. However, in vitro and in vivo experiments also point to a positive regulatory role for SM proteins that is inconsistent with binding syntaxin in a closed conformation. Here we present protocols we used for the expression and purification of the SM proteins Munc18a and Munc18c and syntaxins 1 and 4 along with procedures used for small-angle X-ray and neutron scattering that showed that syntaxins can bind in an open conformation to SM proteins. We also describe methods for chemical cross-linking experiments and detail how this information can be combined with scattering data to obtain low-resolution structural models for SM:Sx protein complexes.
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Affiliation(s)
- Andrew E Whitten
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
| | - Russell J Jarrott
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
| | - Shu-Hong Hu
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
| | - Anthony P Duff
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia
| | - Gordon J King
- Centre for Microscopy and Microanalysis, The University of Queensland, St Lucia, QLD, Australia
| | - Jennifer L Martin
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
| | - Michelle P Christie
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC, Australia.
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