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FNU PIJ, Tanim-Al-Hassan M, Yaroshuk T, Ai Y, Chen H. Absolute Quantitation of Peptides and Proteins by Coulometric Mass Spectrometry After Derivatization. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2024; 495:117153. [PMID: 38009161 PMCID: PMC10673616 DOI: 10.1016/j.ijms.2023.117153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Peptide/protein quantitation using mass spectrometry (MS) is advantageous due to its high sensitivity. Traditional absolute peptide quantitation methods rely on making calibration curves using peptide standards or isotope-labelled peptide standards, which are expensive and take time to synthesize. A method which can eliminate the need for using standards would be beneficial. Recently, we developed coulometric mass spectrometry (CMS) which can be used to quantify peptides that are oxidizable (e.g., those containing tyrosine or tryptophan), without using peptide standard. The method is based on electrochemical oxidation of peptides followed by MS to measure the oxidation yield. However, it cannot be directly used to quantify peptides without oxidizable residues. To extend this method for quantifying peptides/proteins in general, in this study, we adopted a derivatization strategy, in which a target peptide is first tagged with an electroactive reagent such as monocarboxymethylene blue NHS ester (MCMB-NHS ester), followed with quantitation by CMS. To illustrate the power of this method, we have analyzed peptides MG and RPPGFSPFR. The quantification error was less than 5%. Using RPPGFSPFR as an example, the quantitation sensitivity of the technique was found to be 0.25 pmol. Furthermore, we also used the strategy to quantify proteins cytochrome C and β-casein with an error of 2-26%.
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Affiliation(s)
- Praneeth Ivan Joel FNU
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Md. Tanim-Al-Hassan
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Timothy Yaroshuk
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Yongling Ai
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Hao Chen
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
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2
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Asressu KH, Zhang Q. Detection and Semi-quantification of Lipids on High-Performance Thin-Layer Chromatography Plate using Ceric Ammonium Molybdate Staining. EUR J LIPID SCI TECH 2023; 125:2200096. [PMID: 36818638 PMCID: PMC9937734 DOI: 10.1002/ejlt.202200096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Indexed: 12/05/2022]
Abstract
It is desirable to quickly check the composition of lipids in small size samples, but achieving this is challenging using the existing staining methods. Herein, we developed a highly sensitive and semi-quantitative method for analysis of lipid samples with ceric ammonium molybdate (CAM) staining. The CAM detection method was systematically evaluated with a wide range of lipid classes including phospholipids, sphingolipids, glycerolipids, fatty acids (FA) and sterols, demonstrating high sensitivity, stability, and overall efficiency. Additionally, CAM staining provides a clean yellow background in high performance thin-layer chromatography (HPTLC) which facilitates quantification of lipids using image processing software. Lipids can be stained with CAM reagent regardless of their head group types, position of the carbon-carbon double bonds, geometric isomerism and the variation in the length of FA chain, but staining is mostly affected by the degree of unsaturation of the FA backbone. The mechanism of the CAM staining of lipids was proposed on principles of the reduction-oxidation reaction, in which Mo(VI) oxidizes the unsaturated lipids into carbonyl compounds on the HPTLC plate upon heating, while itself being reduced to Mo(IV). This method was applied for the separation, identification, and quantification of lipid extracts from porcine brain.
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Affiliation(s)
- Kesatebrhan Haile Asressu
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, NC 28081, USA
| | - Qibin Zhang
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, NC 28081, USA
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
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3
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Schuster K, Blankart M, Wagner M, Tritschler D, Hinrichs J, Granvogl M, Oellig C. Determination of E 472b emulsifiers in foamed food formulations by high-performance thin-layer chromatography‒fluorescence detection. Eur Food Res Technol 2022. [DOI: 10.1007/s00217-022-04190-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AbstractE 472b emulsifiers, defined as lactic acid esters of mono- and diacylglycerides, are food emulsifiers widely used in foamed food formulations. So far, only qualitative methods for analyzing E 472b emulsifiers have been published. Thus, a new method was developed for determining E 472b in different foamed food formulations by high-performance thin-layer chromatography with fluorescence detection (HPTLC‒FLD). The proposed method allows simple and fast E 472b emulsifier extraction from the food matrix and points out an analytical approach for quantifying these emulsifiers using a commercial E 472b emulsifier as the reference standard. Limits of decision with 56‒59 ng of E 472b emulsifier/zone and limits of quantification with 172‒179 ng of E 472b emulsifier/zone in three foamed model food formulations, respectively, as well as satisfactory repeatability (n = 6) and reproducibility (n = 6) exposed by low relative standard deviation < 8% proved the method suitable for the sensitive and reliable determination of E 472b emulsifiers. Recoveries between 96 and 109.3% were obtained for all investigated model systems. In commercial foamed food formulations from the German market, the E 472b emulsifier content ranged between 0.1 and 0.6 g/100 g.
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A comprehensive review of liquid chromatography hyphenated to post-column photoinduced fluorescence detection system for determination of analytes. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Engel KM, Prabutzki P, Leopold J, Nimptsch A, Lemmnitzer K, Vos DRN, Hopf C, Schiller J. A new update of MALDI-TOF mass spectrometry in lipid research. Prog Lipid Res 2022; 86:101145. [PMID: 34995672 DOI: 10.1016/j.plipres.2021.101145] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/06/2021] [Accepted: 12/29/2021] [Indexed: 01/06/2023]
Abstract
Matrix-assisted laser desorption and ionization (MALDI) mass spectrometry (MS) is an indispensable tool in modern lipid research since it is fast, sensitive, tolerates sample impurities and provides spectra without major analyte fragmentation. We will discuss some methodological aspects, the related ion-forming processes and the MALDI MS characteristics of the different lipid classes (with the focus on glycerophospholipids) and the progress, which was achieved during the last ten years. Particular attention will be given to quantitative aspects of MALDI MS since this is widely considered as the most serious drawback of the method. Although the detailed role of the matrix is not yet completely understood, it will be explicitly shown that the careful choice of the matrix is crucial (besides the careful evaluation of the positive and negative ion mass spectra) in order to be able to detect all lipid classes of interest. Two developments will be highlighted: spatially resolved Imaging MS is nowadays well established and the distribution of lipids in tissues merits increasing interest because lipids are readily detectable and represent ubiquitous compounds. It will also be shown that a combination of MALDI MS with thin-layer chromatography (TLC) enables a fast spatially resolved screening of an entire TLC plate which makes the method competitive with LC/MS.
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Affiliation(s)
- Kathrin M Engel
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Patricia Prabutzki
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Jenny Leopold
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Ariane Nimptsch
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - Katharina Lemmnitzer
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany
| | - D R Naomi Vos
- Center for Biomedical Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Paul-Wittsack-Strasse 10, D-68163 Mannheim, Germany
| | - Carsten Hopf
- Center for Biomedical Mass Spectrometry and Optical Spectroscopy (CeMOS), Mannheim University of Applied Sciences, Paul-Wittsack-Strasse 10, D-68163 Mannheim, Germany
| | - Jürgen Schiller
- Leipzig University, Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstraße 16-18, D-04107, Germany.
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Amorim TL, de Oliveira MAL. Advances in Lipid Capillary Electromigration Methods to Food Analysis Within the 2010s Decade. FOOD ANAL METHOD 2020. [DOI: 10.1007/s12161-020-01772-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Parchem K, Sasson S, Ferreri C, Bartoszek A. Qualitative analysis of phospholipids and their oxidised derivatives - used techniques and examples of their applications related to lipidomic research and food analysis. Free Radic Res 2019; 53:1068-1100. [PMID: 31419920 DOI: 10.1080/10715762.2019.1657573] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Phospholipids (PLs) are important biomolecules that not only constitute structural building blocks and scaffolds of cell and organelle membranes but also play a vital role in cell biochemistry and physiology. Moreover, dietary exogenous PLs are characterised by high nutritional value and other beneficial health effects, which are confirmed by numerous epidemiological studies. For this reason, PLs are of high interest in lipidomics that targets both the analysis of membrane lipid distribution as well as correlates composition of lipids with their effects on functioning of cells, tissues and organs. Lipidomic assessments follow-up the changes occurring in living organisms, such as free radical attack and oxidative modifications of the polyunsaturated fatty acids (PUFAs) build in PL structures. Oxidised PLs (oxPLs) can be generated exogenously and supplied to organisms with processed food or formed endogenously as a result of oxidative stress. Cellular and tissue oxPLs can be a biomarker predictive of the development of numerous diseases such as atherosclerosis or neuroinflammation. Therefore, suitable high-throughput analytical techniques, which enable comprehensive analysis of PL molecules in terms of the structure of hydrophilic group, fatty acid (FA) composition and oxidative modifications of FAs, have been currently developed. This review addresses all aspects of PL analysis, including lipid isolation, chromatographic separation of PL classes and species, as well as their detection. The bioinformatic tools that enable handling of a large amount of data generated during lipidomic analysis are also discussed. In addition, imaging techniques such as confocal microscopy and mass spectrometry imaging for analysis of cellular lipid maps, including membrane PLs, are presented.
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Affiliation(s)
- Karol Parchem
- Department of Food Chemistry, Technology and Biotechnology, Faculty of Chemistry, Gdansk University of Technology, Gdańsk, Poland
| | - Shlomo Sasson
- Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Carla Ferreri
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Agnieszka Bartoszek
- Department of Food Chemistry, Technology and Biotechnology, Faculty of Chemistry, Gdansk University of Technology, Gdańsk, Poland
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Acquaviva A, Jones A, Dennis GR, Castells C, Shalliker RA, Soliven A. Narrow bore post column derivatisation assays via reaction flow chromatography. Microchem J 2018. [DOI: 10.1016/j.microc.2018.06.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Detection of Phosphatidylcholine Content in Crude Oil with Bio-Enzyme Screen-Printed Electrode. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1354-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Baranauskaite J, Kubiliene A, Marksa M, Petrikaite V, Vitkevičius K, Baranauskas A, Bernatoniene J. The Influence of Different Oregano Species on the Antioxidant Activity Determined Using HPLC Postcolumn DPPH Method and Anticancer Activity of Carvacrol and Rosmarinic Acid. BIOMED RESEARCH INTERNATIONAL 2017; 2017:1681392. [PMID: 29181386 PMCID: PMC5664182 DOI: 10.1155/2017/1681392] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/12/2017] [Accepted: 08/27/2017] [Indexed: 11/18/2022]
Abstract
The aim of this study was to evaluate concentration-dependent antioxidant and anticancer activities of CA and RA in ethanol extracts of three different Oregano species (Origanum onites L., Origanum vulgare L., and Origanum vulgare ssp. hirtum). The study revealed the highest RA antioxidant activity in O. vulgare ssp. hirtum (9550 ± 95 mmol/g) and the lowest in O. vulgare L. (2605 ± 52 mmol/g) (p < 0.05). The highest CA amount was present in O. onites L., which was 1.8 and 4.7 times higher (p < 0.05) than in O. vulgare ssp. hirtum and O. vulgare L., respectively. The anticancer activity was evaluated on human glioblastoma (U87) and triple-negative breast cancer (MDA-MB231) cell lines in vitro. RA anticancer activity was negligible. CA and the extracts were about 1.5-2 times more active against MDA-MB231 cell line (p < 0.05) compared to U87 cell line. The anticancer activities of three tested extracts were similar against U87 cell line (p > 0.05) but they had different activities against MDA-MB231 cell line.
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Affiliation(s)
- Juste Baranauskaite
- Department of Drugs Technology and Social Pharmacy, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Asta Kubiliene
- Department of Analytical and Toxicological Chemistry, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Mindaugas Marksa
- Department of Analytical and Toxicological Chemistry, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Vilma Petrikaite
- Department of Drug Chemistry, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Konradas Vitkevičius
- Department of Analytical and Toxicological Chemistry, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Algirdas Baranauskas
- Department of Drugs Technology and Social Pharmacy, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
| | - Jurga Bernatoniene
- Department of Drugs Technology and Social Pharmacy, Lithuanian University of Health Sciences, Medical Academy, Kaunas, Lithuania
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11
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Quantitative analysis of drugs in biological matrices by HPLC hyphenated to fluorescence detection. Bioanalysis 2016; 7:743-62. [PMID: 25871590 DOI: 10.4155/bio.15.20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An overview of the state-of-the art in HPLC coupled with fluorescence detection is presented. Over the last 20 years, the increasing number of methodological papers on this topic (4082 between 1994 and 2004 and 7725 between 2004 and 2014) is testament to its utility in bioanalytical applications. Compared with conventional UV absorbance detection used in HPLC, fluorescence detection can greatly enhance the sensitivity leading to limits of detection similar to those obtained with mass spectrometry, offering researchers a sensitive, robust and relatively inexpensive instrumental method. This work will focus on the analysis of pharmaceutical compounds in different biological matrices, either naturally fluorescent or derivatized with a fluorescent agent, and some of them chiral. Therapeutic applications, sample preparation and derivatization, sensitivity for each example are described.
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12
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Rimkiene L, Ivanauskas L, Kubiliene A, Vitkevicius K, Kiliuviene G, Jakstas V. Optimization of a CUPRAC-Based HPLC Postcolumn Assay and Its Applications for Ginkgo biloba L. Extracts. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2015; 2015:280167. [PMID: 26236538 PMCID: PMC4509493 DOI: 10.1155/2015/280167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 06/21/2015] [Indexed: 06/04/2023]
Abstract
The aim of the present work was to improve and validate the HPLC-CUPRAC postcolumn method for the evaluation of active antioxidant markers from the acetonic extracts of Ginkgo biloba leaves. Improvement of the HPLC online assay was performed by evaluating the suitable loop temperature, the reaction loop length, and the impact of flow rate. Separation of the analytes was performed by the HPLC method on an ACE C18 analytical column using a gradient elution program. The separated antioxidant markers in the extracts reacted with copper(II)-neocuproine (Cu(II)-Nc) reagent in the postcolumn reaction coil. The reagent was reduced by antioxidants to the copper(I)-neocuproine (Cu(I)-Nc) chelate with a maximum absorption at 450 nm. Validation experiments confirmed sufficient precision, sensitivity, and effectiveness of the corresponding method, which could be used for further evaluations of active antioxidant compounds in similar plant materials.
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Affiliation(s)
- Laura Rimkiene
- Department of Analytical and Toxicological Chemistry, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
| | - Liudas Ivanauskas
- Department of Analytical and Toxicological Chemistry, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
| | - Asta Kubiliene
- Department of Analytical and Toxicological Chemistry, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
| | - Konradas Vitkevicius
- Department of Analytical and Toxicological Chemistry, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
| | - Guoda Kiliuviene
- Department of Analytical and Toxicological Chemistry, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
| | - Valdas Jakstas
- Department of Pharmacognosy, Faculty of Pharmacy, Medical Academy of Lithuanian University of Health Sciences, Eiveniu Street 4, LT-50161 Kaunas, Lithuania
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Marksa M, Radušienė J, Jakštas V, Ivanauskas L, Marksienė R. Development of an HPLC post-column antioxidant assay forSolidago canadensisradical scavengers. Nat Prod Res 2015; 30:536-43. [DOI: 10.1080/14786419.2015.1027703] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Montealegre C, Verardo V, Luisa Marina M, Caboni MF. Analysis of glycerophospho- and sphingolipids by CE. Electrophoresis 2014; 35:779-92. [DOI: 10.1002/elps.201300534] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 11/19/2013] [Accepted: 11/19/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Cristina Montealegre
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Alcalá de Henares Madrid Spain
| | - Vito Verardo
- Inter-Departmental Centre for Agri-Food Industrial Research (CIRI Agroalimentare); University of Bologna; Piazza Goidanich Cesena (FC) Italy
| | - María Luisa Marina
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Alcalá de Henares Madrid Spain
| | - Maria Fiorenza Caboni
- Inter-Departmental Centre for Agri-Food Industrial Research (CIRI Agroalimentare); University of Bologna; Piazza Goidanich Cesena (FC) Italy
- Department of Agricultural and Food Sciences; Alma Mater Studiorum-Università di Bologna; Piazza Goidanich Cesena (FC) Italy
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Enriquez-Algeciras M, Bhattacharya SK. Lipidomic mass spectrometry and its application in neuroscience. World J Biol Chem 2013; 4:102-110. [PMID: 24340133 PMCID: PMC3856305 DOI: 10.4331/wjbc.v4.i4.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Accepted: 10/18/2013] [Indexed: 02/05/2023] Open
Abstract
Central and peripheral nervous systems are lipid rich tissues. Lipids, in the context of lipid-protein complexes, surround neurons and provide electrical insulation for transmission of signals allowing neurons to remain embedded within a conducting environment. Lipids play a key role in vesicle formation and fusion in synapses. They provide means of rapid signaling, cell motility and migration for astrocytes and other cell types that surround and play supporting roles neurons. Unlike many other signaling molecules, lipids are capable of multiple signaling events based on the different fragments generated from a single precursor during each event. Lipidomics, until recently suffered from two major disadvantages: (1) level of expertise required an overwhelming amount of chemical detail to correctly identify a vast number of different lipids which could be close in their chemical reactivity; and (2) high amount of purified compounds needed by analytical techniques to determine their structures. Advances in mass spectrometry have enabled overcoming these two limitations. Mass spectrometry offers a great degree of simplicity in identification and quantification of lipids directly extracted from complex biological mixtures. Mass spectrometers can be regarded to as mass analyzers. There are those that separate and analyze the product ion fragments in space (spatial) and those which separate product ions in time in the same space (temporal). Databases and standardized instrument parameters have further aided the capabilities of the spatial instruments while recent advances in bioinformatics have made the identification and quantification possible using temporal instruments.
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Wang J, Sibrian-Vazquez M, Escobedo JO, Lowry M, Wang L, Chu YH, Moore RG, Strongin RM. Simple enrichment and analysis of plasma lysophosphatidic acids. Analyst 2013; 138:6852-9. [PMID: 24067566 PMCID: PMC3929374 DOI: 10.1039/c3an01168b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A simple and highly efficient technique for the analysis of lysophosphatidic acid (LPA) subspecies in human plasma is described. The streamlined sample preparation protocol furnishes the five major LPA subspecies with excellent recoveries. Extensive analysis of the enriched sample reveals only trace levels of other phospholipids. This level of purity not only improves MS analyses, but enables HPLC post-column detection in the visible region with a commercially available fluorescent phospholipids probe. Human plasma samples from different donors were analyzed using the above method and validated by LC-ESI/MS/MS.
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Affiliation(s)
- Jialu Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Martha Sibrian-Vazquez
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Jorge O. Escobedo
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Mark Lowry
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Lei Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Yu-Hsuan Chu
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
| | - Richard G. Moore
- Women and Infants Hospital, Brown University, 101 Dudley Street, Providence, RI 02905, USA.; Tel: +1 401-453-7520
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.; Fax: +1 503-725-9525; Tel: +1 503-725-9724
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Lutz NW, Cozzone PJ. Principles of multiparametric optimization for phospholipidomics by 31P NMR spectroscopy. Biophys Rev 2013; 5:295-304. [PMID: 28510110 DOI: 10.1007/s12551-013-0105-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 01/25/2013] [Indexed: 10/27/2022] Open
Abstract
Phospholipids have long been known to be the principal constituents of the bilayer matrix of cell membranes. While the main function of cell membranes is to provide physical separation between intracellular and extracellular compartments, further biological and biochemical functions for phospholipids have been identified more recently, notably in cell signaling, cell recognition and cell-cell interaction, but also in cell growth, electrical insulation of neurons and many other processes. Therefore, accurate and efficient determination of tissue phospholipid composition is essential for our understanding of biological tissue function. 31P NMR spectroscopy is a quantitative and fast method for analyzing phospholipid extracts from biological samples without prior separation. However, the number of phospholipid classes and subclasses that can be quantified separately and reliably in 31P NMR spectra of tissue extracts is critically dependent on a variety of experimental conditions. Until recently, little attention has been paid to the optimization of phospholipid 31P NMR spectra. This review surveys the basic physicochemical properties that determine the quality of phospholipid spectra, and describes an optimization strategy based on this assessment. Notably, the following experimental parameters need to be controlled for systematic optimization: (1) extract concentration, (2) concentration of chelating agent, (3) pH value of the aqueous component of the solvent system, and (4) temperature of the NMR measurement. We conclude that a multiparametric optimization approach is crucial to obtaining highly predictable and reproducible 31P NMR spectra of phospholipids.
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Affiliation(s)
- Norbert W Lutz
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Faculté de Médecine de la Timone, Aix-Marseille Université, 27 bd. Jean Moulin, 13005, Marseille, France.
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Faculté de Médecine de la Timone, Aix-Marseille Université, 27 bd. Jean Moulin, 13005, Marseille, France
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18
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Bhattacharya SK. Recent advances in shotgun lipidomics and their implication for vision research and ophthalmology. Curr Eye Res 2013; 38:417-27. [PMID: 23330842 DOI: 10.3109/02713683.2012.760742] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In the past decade, mass spectrometry (MS) has made tremendous advances toward the profiling and identification of lipids from biological samples. MS is attractive for the simplicity it offers toward total profiling of lipids, the identification and characterization of individual entities directly after extraction from complex biological mixtures utilizing an infusion mode. Fundamentally, two types of mass analyzers exist, depending upon whether the fragment ion resolution and analysis occurs in space domain or in time domain within the mass spectrometer. Compared to MS, chromatographic methods are cumbersome. Nuclear magnetic resonance, which provides unequivocal elucidation of structures, necessitates much higher absolute amount and demands purity of lipids. We present here an account of recent developments in class-specific lipid identification strategies, targeted and untargeted lipid analyses, identification and de novo structure elucidation using mass spectrometric and combinatorial chemical derivatization and MS. We have reviewed the strategies with emphasis for spatial domain fragment resolution mass analyzers enabling analysis of lipids in a class-specific manner. We also provide a brief account of database and bioinformatic tools that have been recently developed toward profiling, identification and quantification of lipids in complex biological mixtures.
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