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Cebolla VL, Jarne C, Vela J, Garriga R, Membrado L, Galbán J. Scanning densitometry and mass spectrometry for HPTLC analysis of lipids: The last 10 years. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2020.1866600] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Carmen Jarne
- Instituto de Carboquímica, ICB-CSIC, Zaragoza, Spain
| | - Jesús Vela
- Departamento de Química Analítica, EINA, Universidad de Zaragoza, Zaragoza, Spain
| | - Rosa Garriga
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain
| | - Luis Membrado
- Instituto de Carboquímica, ICB-CSIC, Zaragoza, Spain
| | - Javier Galbán
- Departamento de Química Analítica, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain
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Jarne C, Membrado L, Savirón M, Vela J, Orduna J, Garriga R, Galbán J, Cebolla VL. Globotriaosylceramide-related biomarkers of fabry disease identified in plasma by high-performance thin-layer chromatography - densitometry- mass spectrometry. J Chromatogr A 2021; 1638:461895. [PMID: 33477028 DOI: 10.1016/j.chroma.2021.461895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 11/29/2022]
Abstract
Identification of 19 molecular species of globotriaosylceramides (Gb3) in extracts from a Fabry's plasma patient and a healthy control was performed by High-Performance Thin-Layer Chromatography (HPTLC)-densitometry and online coupling to Mass Spectrometry (MS). Separation was carried out on LiChrospher plates using Automated Multiple Development (AMD). Densitometry was performed on twin plates by combining detection in the visible at 550 nm, through previous on-plate orcinol derivatization, and by Ultraviolet 190 nm, using a non-impregnated plate. The latter was directly coupled to an ion-trap mass spectrometer through an automated elution-based interface. Gb3 molecular species, which were identified by HPTLC- Electrospray Mass Spectrometry (+)-MS and confirmed by MS/MS or HPTLC-Atmospheric Pressure Chemical Ionization Mass Spectrometry (+)-MS, are: five isoforms of saturated Gb3; seven isoforms of methylated Gb3; and seven species with two additional double bonds. Twelve of these species were previously reported as biomarkers of Fabry's lysosomal disorder using a Liquid Chromatography-MS-based method, and the other seven are structurally similar, closely related to them. Saturated Gb3 isoforms migrated on LiChrospher plate in one of the separated peaks corresponding to the migration zone of ceramide trihexosides standard. Instead, methylated and unsaturated Gb3 species co-migrated with sphingomyelin species. Ion intensity ESI-MS profiles show that saturated Gb3 species in Fabry's plasma were in higher concentration than in control sample. Before applying the Thin-Layer Chromatography (TLC)-MS interface on HPTLC separated peaks, its positioning precision was first studied using ceramide tri-hexosides as model compound. This provided information on Gb3 peak broadening and splitting during its migration.
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Affiliation(s)
- Carmen Jarne
- Instituto de Carboquímica, CSIC, C/ Miguel Luesma, 4, 50018 Zaragoza, Spain
| | - Luis Membrado
- Instituto de Carboquímica, CSIC, C/ Miguel Luesma, 4, 50018 Zaragoza, Spain
| | - María Savirón
- CEQMA-CSIC, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jesús Vela
- Departamento de Química Analítica, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jesús Orduna
- CEQMA-CSIC, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Rosa Garriga
- Departamento de Química Orgánica y Química-Física, Universidad de Zaragoza, 50009 Spain
| | - Javier Galbán
- Departamento de Química Analítica, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Vicente L Cebolla
- Instituto de Carboquímica, CSIC, C/ Miguel Luesma, 4, 50018 Zaragoza, Spain.
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Torretta E, Barbacini P, Al-Daghri NM, Gelfi C. Sphingolipids in Obesity and Correlated Co-Morbidities: The Contribution of Gender, Age and Environment. Int J Mol Sci 2019; 20:ijms20235901. [PMID: 31771303 PMCID: PMC6929069 DOI: 10.3390/ijms20235901] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/20/2019] [Accepted: 11/22/2019] [Indexed: 02/07/2023] Open
Abstract
This paper reviews our present knowledge on the contribution of ceramide (Cer), sphingomyelin (SM), dihydroceramide (DhCer) and sphingosine-1-phosphate (S1P) in obesity and related co-morbidities. Specifically, in this paper, we address the role of acyl chain composition in bodily fluids for monitoring obesity in males and females, in aging persons and in situations of environmental hypoxia adaptation. After a brief introduction on sphingolipid synthesis and compartmentalization, the node of detection methods has been critically revised as the node of the use of animal models. The latter do not recapitulate the human condition, making it difficult to compare levels of sphingolipids found in animal tissues and human bodily fluids, and thus, to find definitive conclusions. In human subjects, the search for putative biomarkers has to be performed on easily accessible material, such as serum. The serum “sphingolipidome” profile indicates that attention should be focused on specific acyl chains associated with obesity, per se, since total Cer and SM levels coupled with dyslipidemia and vitamin D deficiency can be confounding factors. Furthermore, exposure to hypoxia indicates a relationship between dyslipidemia, obesity, oxygen level and aerobic/anaerobic metabolism, thus, opening new research avenues in the role of sphingolipids.
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Affiliation(s)
- Enrica Torretta
- Department of Biomedical Sciences for Health, University of Milan, Luigi Mangiagalli 31, 20133 Milan, Italy; (E.T.); (P.B.)
| | - Pietro Barbacini
- Department of Biomedical Sciences for Health, University of Milan, Luigi Mangiagalli 31, 20133 Milan, Italy; (E.T.); (P.B.)
- Ph.D. school in Molecular and Translational Medicine, University of Milan, 20142 Milan, Italy
| | - Nasser M. Al-Daghri
- Chair for Biomarkers of Chronic Diseases, Biochemistry Department,College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Cecilia Gelfi
- Department of Biomedical Sciences for Health, University of Milan, Luigi Mangiagalli 31, 20133 Milan, Italy; (E.T.); (P.B.)
- I.R.C.C.S Orthopedic Institute Galeazzi, R. Galeazzi 4, 20161 Milan, Italy
- Correspondence: ; Tel.: +39-025-033-0475
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4
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Sarbu M, Dehelean L, Munteanu CVA, Ica R, Petrescu AJ, Zamfir AD. Human caudate nucleus exhibits a highly complex ganglioside pattern as revealed by high-resolution multistage Orbitrap MS. J Carbohydr Chem 2019. [DOI: 10.1080/07328303.2019.1669632] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mirela Sarbu
- Department of Applied Physics, National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, Romania
| | - Liana Dehelean
- Department of Neurosciences, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Cristian V. A. Munteanu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Raluca Ica
- Department of Applied Physics, National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, Romania
| | - Andrei J. Petrescu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Alina D. Zamfir
- Department of Applied Physics, National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, Romania
- Department of Technical and Natural Sciences, “Aurel Vlaicu” University of Arad, Arad, Romania
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5
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Schwarzmann G. Labeled gangliosides: their synthesis and use in biological studies. FEBS Lett 2018; 592:3992-4006. [DOI: 10.1002/1873-3468.13239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 08/31/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Günter Schwarzmann
- LIMES c/o Kekulé‐Institut f. Organische Chemie und Biochemie Rheinische Friedrich‐Wilhelms‐Universität Bonn Germany
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6
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Hunter CD, Guo T, Daskhan G, Richards MR, Cairo CW. Synthetic Strategies for Modified Glycosphingolipids and Their Design as Probes. Chem Rev 2018; 118:8188-8241. [DOI: 10.1021/acs.chemrev.8b00070] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Carmanah D. Hunter
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Tianlin Guo
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Gour Daskhan
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Michele R. Richards
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Christopher W. Cairo
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2013-2014. MASS SPECTROMETRY REVIEWS 2018; 37:353-491. [PMID: 29687922 DOI: 10.1002/mas.21530] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 11/29/2016] [Indexed: 06/08/2023]
Abstract
This review is the eighth update of the original article published in 1999 on the application of Matrix-assisted laser desorption/ionization mass spectrometry (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2014. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation, and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly- saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2018 Wiley Periodicals, Inc. Mass Spec Rev 37:353-491, 2018.
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Affiliation(s)
- David J Harvey
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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8
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Potent Inhibitors against Newcastle Disease Virus Hemagglutinin-Neuraminidase. ChemMedChem 2018; 13:236-240. [DOI: 10.1002/cmdc.201700755] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Indexed: 01/05/2023]
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9
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Immunological analysis of food proteins using high-performance thin-layer chromatography-immunostaining. J Chromatogr A 2017; 1526:157-166. [DOI: 10.1016/j.chroma.2017.10.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 11/22/2022]
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10
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Rota P, Papini N, La Rocca P, Montefiori M, Cirillo F, Piccoli M, Scurati R, Olsen L, Allevi P, Anastasia L. Synthesis and chemical characterization of several perfluorinated sialic acid glycals and evaluation of their in vitro antiviral activity against Newcastle disease virus. MEDCHEMCOMM 2017; 8:1505-1513. [PMID: 30108862 PMCID: PMC6072510 DOI: 10.1039/c7md00072c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 06/02/2017] [Indexed: 12/12/2022]
Abstract
Newcastle Disease Virus (NDV), belonging to the Paramyxoviridae family, causes a serious infectious disease in birds, resulting in severe losses in the poultry industry every year. Haemagglutinin neuraminidase glycoprotein (HN) has been recognized as a key protein in the viral infection mechanism, and its inhibition represents an attractive target for the development of new drugs based on sialic acid glycals, with the 2-deoxy-2,3-didehydro-d-N-acetylneuraminic acid (Neu5Ac2en) as their backbone. Herein we report the synthesis of several Neu5Ac2en glycals and of their perfluorinated C-5 modified derivatives, including their respective stereoisomers at C-4, together with evaluation of their in vitro antiviral activity. While all synthesized compounds were found to be active HN inhibitors in the micromolar range, we found that their potency was influenced by the chain-length of the C-5 perfluorinated acetamido functionality. Thus, the binding modes of the inhibitors were also investigated by performing a docking study. Moreover, the perfluorinated glycals were found to be more active than the corresponding normal C-5 acylic derivatives. Finally, cell-cell fusion assays on NDV infected cells revealed that the addition of a newly synthesized C-4α heptafluorobutyryl derivative almost completely inhibited NDV-induced syncytium formation.
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Affiliation(s)
- P Rota
- Laboratory of Stem Cells for Tissue Engineering , IRCCS Policlinico San Donato, Piazza Malan 2 , 20097 San Donato Milanese , Milan , Italy . ; ; Tel: +0252774674
- Department of Biomedical , Surgical and Dental Sciences , University of Milan , Via Saldini 50 , 20133 Milan , Italy
| | - N Papini
- Department of Medical Biotechnology and Translational Medicine , University of Milan , Via Fratelli Cervi 93 , 20090 Segrate , Milan , Italy
| | - P La Rocca
- Laboratory of Stem Cells for Tissue Engineering , IRCCS Policlinico San Donato, Piazza Malan 2 , 20097 San Donato Milanese , Milan , Italy . ; ; Tel: +0252774674
- Department of Biomedical , Surgical and Dental Sciences , University of Milan , Via Saldini 50 , 20133 Milan , Italy
| | - M Montefiori
- Department of Drug Design and Pharmacology , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - F Cirillo
- Laboratory of Stem Cells for Tissue Engineering , IRCCS Policlinico San Donato, Piazza Malan 2 , 20097 San Donato Milanese , Milan , Italy . ; ; Tel: +0252774674
| | - M Piccoli
- Laboratory of Stem Cells for Tissue Engineering , IRCCS Policlinico San Donato, Piazza Malan 2 , 20097 San Donato Milanese , Milan , Italy . ; ; Tel: +0252774674
| | - R Scurati
- Department of Drug Design and Pharmacology , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - L Olsen
- Department of Drug Design and Pharmacology , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - P Allevi
- Department of Biomedical , Surgical and Dental Sciences , University of Milan , Via Saldini 50 , 20133 Milan , Italy
| | - L Anastasia
- Laboratory of Stem Cells for Tissue Engineering , IRCCS Policlinico San Donato, Piazza Malan 2 , 20097 San Donato Milanese , Milan , Italy . ; ; Tel: +0252774674
- Department of Biomedical Sciences for Health , University of Milan , Via Fratelli Cervi 9 , 20090 Segrate , Milan , Italy
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11
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Groux-Degroote S, Guérardel Y, Delannoy P. Gangliosides: Structures, Biosynthesis, Analysis, and Roles in Cancer. Chembiochem 2017; 18:1146-1154. [PMID: 28295942 DOI: 10.1002/cbic.201600705] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Indexed: 12/30/2022]
Abstract
Gangliosides are acidic glycosphingolipids containing one or more sialic acid residues. They are essential compounds at the outer leaflet of the plasma membrane, where they interact with phospholipids, cholesterol, and transmembrane proteins, forming lipid rafts. They are involved in cell adhesion, proliferation, and recognition processes, as well as in the modulation of signal transduction pathways. These functions are mainly governed by the glycan moiety, and changes in the structures of gangliosides occur under pathological conditions, particularly in neuro-ectoderm-derived cancers. With the progress in mass spectrometry analysis of gangliosides, their role in cancer progression can be now investigated in more detail. In this review we summarize the current knowledge on the biosynthesis of gangliosides and their role in cancers, together with the recent development of cancer immunotherapy targeting gangliosides.
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Affiliation(s)
- Sophie Groux-Degroote
- Université de Lille, CNRS, UMR 8576, UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Yann Guérardel
- Université de Lille, CNRS, UMR 8576, UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Philippe Delannoy
- Université de Lille, CNRS, UMR 8576, UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
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Torretta E, Fania C, Vasso M, Gelfi C. HPTLC-MALDI MS for (glyco)sphingolipid multiplexing in tissues and blood: A promising strategy for biomarker discovery and clinical applications. Electrophoresis 2016; 37:2036-49. [DOI: 10.1002/elps.201600094] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/29/2016] [Accepted: 05/02/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Enrica Torretta
- Department of Biomedical Sciences for Health; University of Milan; Milan Italy
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
| | - Chiara Fania
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
| | - Michele Vasso
- Institute of Molecular Bioimaging and Physiology (IBFM); CNR Milan Italy
| | - Cecilia Gelfi
- Department of Biomedical Sciences for Health; University of Milan; Milan Italy
- IRCCS Policlinico San Donato; Piazza Edmondo Malan; San Donato Milanese Milan Italy
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High-performance thin-layer chromatography as a fast screening tool for phosphorylated peptides. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1008:198-205. [DOI: 10.1016/j.jchromb.2015.11.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/19/2015] [Accepted: 11/29/2015] [Indexed: 12/13/2022]
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Canela N, Herrero P, Mariné S, Nadal P, Ras MR, Rodríguez MÁ, Arola L. Analytical methods in sphingolipidomics: Quantitative and profiling approaches in food analysis. J Chromatogr A 2015; 1428:16-38. [PMID: 26275862 DOI: 10.1016/j.chroma.2015.07.110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/27/2015] [Accepted: 07/31/2015] [Indexed: 02/07/2023]
Abstract
In recent years, sphingolipidomics has emerged as an interesting omic science that encompasses the study of the full sphingolipidome characterization, content, structure and activity in cells, tissues or organisms. Like other omics, it has the potential to impact biomarker discovery, drug development and systems biology knowledge. Concretely, dietary food sphingolipids have gained considerable importance due to their extensively reported bioactivity. Because of the complexity of this lipid family and their diversity among foods, powerful analytical methodologies are needed for their study. The analytical tools developed in the past have been improved with the enormous advances made in recent years in mass spectrometry (MS) and chromatography, which allow the convenient and sensitive identification and quantitation of sphingolipid classes and form the basis of current sphingolipidomics methodologies. In addition, novel hyphenated nuclear magnetic resonance (NMR) strategies, new ionization strategies, and MS imaging are outlined as promising technologies to shape the future of sphingolipid analyses. This review traces the analytical methods of sphingolipidomics in food analysis concerning sample extraction, chromatographic separation, the identification and quantification of sphingolipids by MS and their structural elucidation by NMR.
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Affiliation(s)
- Núria Canela
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Pol Herrero
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Sílvia Mariné
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Pedro Nadal
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | - Maria Rosa Ras
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain
| | | | - Lluís Arola
- Centre for Omic Sciences, Universitat Rovira i Virgili (COS-URV), Spain.
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Häbe TT, Morlock GE. Quantitative surface scanning by Direct Analysis in Real Time mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:474-484. [PMID: 26160413 DOI: 10.1002/rcm.7127] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 12/14/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
RATIONALE Only a few ambient ionization sources have been demonstrated to work quantitatively for surface scanning. A modification of the Direct Analysis in Real Time mass spectrometry (DART-MS) interface is needed to improve the precision during the scanning of a high-performance thin-layer chromatography (HPTLC) plate or any other surface or planar substrate, especially for quantitation without an internal standard correction. METHODS The substrate movement relative to the ion source outlet and the mass spectrometer inlet was optimized to improve the desorption, ionization, and capture of analytes. The substrate carrier was mounted at an angled position, thus reducing collisions between the deflected gas stream and the inner transfer tube wall. A special transfer tube, whose edge was angled towards the substrate and allowed a narrow set-up of the ambient air gap, captured the deflected DART gas stream. RESULTS For the repeated DART-MS scanning along five identical deposited bands of butyl-4-hydroxybenzoate a mean precision of 2.7% was obtained. A signal decay of 62% was observed after five scans. After HPTLC of methyl-4-hydroxybenzoate and butyl-4-hydroxybenzoate, mean determination coefficients of 0.9937 and 0.9906 were obtained for five calibrations on five plates, respectively. The mean recovery of two control standards was 94% with a mean repeatability of 9% (%RSD, n = 5) obtained on five different plates. CONCLUSIONS The DART SVPA-3DS system remained compact and the access to the substrate was kept wide open despite the optimized scan lane (spatial resolution at full width at half maximum 0.8 mm, height 3 mm). The performance data showed that the quantitative surface scanning was improved as well as the desorption efficacy and detectability using this modified DART-MS interface.
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Affiliation(s)
- Tim T Häbe
- Interdisciplinary Research Center (IFZ) and Institute of Nutritional Science, Chair of Food Science, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany
| | - Gertrud E Morlock
- Interdisciplinary Research Center (IFZ) and Institute of Nutritional Science, Chair of Food Science, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany
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