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Šebela M. Biomolecular Profiling by MALDI-TOF Mass Spectrometry in Food and Beverage Analyses. Int J Mol Sci 2022; 23:13631. [PMID: 36362416 PMCID: PMC9654121 DOI: 10.3390/ijms232113631] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/20/2022] [Accepted: 11/02/2022] [Indexed: 09/08/2024] Open
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has frequently been applied to the analysis of biomolecules. Its strength resides not only in compound identification but particularly in acquiring molecular profiles providing a high discriminating power. The main advantages include its speed, simplicity, versatility, minimum sample preparation needs, and a relatively high tolerance to salts. Other benefits are represented by the possibility of automation, high throughput, sensitivity, accuracy, and good reproducibility, allowing quantitative studies. This review deals with the prominent use of MALDI-TOF MS profiling in food and beverage analysis ranging from the simple detection of sample constituents to quantifications of marker compounds, quality control, and assessment of product authenticity. This review summarizes relevant discoveries that have been obtained with milk and milk products, edible oils, wine, beer, flour, meat, honey, and other alimentary products. Marker molecules are specified: proteins and peptides for milk, cheeses, flour, meat, wine and beer; triacylglycerols and phospholipids for oils; and low-molecular-weight metabolites for wine, beer and chocolate. Special attention is paid to sample preparation techniques and the combination of spectral profiling and statistical evaluation methods, which is powerful for the differentiation of samples and the sensitive detection of frauds and adulterations.
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Affiliation(s)
- Marek Šebela
- Department of Biochemistry, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
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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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Sacchi R, Cutignano A, Picariello G, Paduano A, Genovese A, Siano F, Nuzzo G, Caira S, Lubritto C, Ricci P, D'Auria A, Di Pasquale G, Motta A, Addeo F. Olive oil from the 79 A.D. Vesuvius eruption stored at the Naples National Archaeological Museum (Italy). NPJ Sci Food 2020; 4:19. [PMID: 33298959 PMCID: PMC7606599 DOI: 10.1038/s41538-020-00077-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 09/14/2020] [Indexed: 01/18/2023] Open
Abstract
Using a range of chromatographic, spectroscopic, and mass spectrometric analytical techniques, we characterized one of the "edible items" found at the Vesuvius archeological sites and guarded at the National Archaeological Museum of Naples (MANN) in Naples, Italy. We authenticated the specimen contained in a glass bottle (Mann-S1 sample) as originally olive oil and mapped the deep evolution throughout its 2000 years of storage. Triacylglycerols were completely hydrolyzed, while the resulting (hydroxy) fatty acids had partly condensed into rarely found estolides. A complex pattern of volatile compounds arose mainly from breakdown of oleic acid. With excellent approximation, radiocarbon dating placed the find at the time of the Plinian Mount Vesuvius eruption in 79 A.D., indicating that Mann-S1 is probably the oldest residue of olive oil in the world found in bulk amount (nearly 0.7 L).
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Affiliation(s)
- Raffaele Sacchi
- Department of Agricultural Sciences, Unit of Food Science & Technology, University of Naples "Federico II", Via Università 100, 80055, Portici (Naples), Italy.
| | - Adele Cutignano
- Institute of Biomolecular Chemistry, National Research Council, ICB-CNR, Via Campi Flegrei 34, 80078, Pozzuoli (Naples), Italy
| | - Gianluca Picariello
- Institute of Food Sciences, National Research Council, ISA-CNR, Via Roma 64, 83100, Avellino, Italy
| | - Antonello Paduano
- Department of Agricultural and Environmental Science, University of Bari "Aldo Moro", Via Orabona 4, 70125, Bari, Italy
| | - Alessandro Genovese
- Department of Agricultural Sciences, Unit of Food Science & Technology, University of Naples "Federico II", Via Università 100, 80055, Portici (Naples), Italy
| | - Francesco Siano
- Institute of Food Sciences, National Research Council, ISA-CNR, Via Roma 64, 83100, Avellino, Italy
| | - Genoveffa Nuzzo
- Institute of Biomolecular Chemistry, National Research Council, ICB-CNR, Via Campi Flegrei 34, 80078, Pozzuoli (Naples), Italy
| | - Simonetta Caira
- Institute for the Animal Production System in the Mediterranean Environment, National Research Council, ISPAAM-CNR, Via Argine 1085, 80147, Naples, Italy
| | - Carmine Lubritto
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100, Caserta, Italy
| | - Paola Ricci
- Department of Environmental, Biological and Pharmaceutical Science and Technology, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100, Caserta, Italy
| | - Alessia D'Auria
- Department of Agricultural Sciences, Unit of Food Science & Technology, University of Naples "Federico II", Via Università 100, 80055, Portici (Naples), Italy
| | - Gaetano Di Pasquale
- Department of Agricultural Sciences, Unit of Food Science & Technology, University of Naples "Federico II", Via Università 100, 80055, Portici (Naples), Italy
| | - Andrea Motta
- Institute of Biomolecular Chemistry, National Research Council, ICB-CNR, Via Campi Flegrei 34, 80078, Pozzuoli (Naples), Italy
| | - Francesco Addeo
- Department of Agricultural Sciences, Unit of Food Science & Technology, University of Naples "Federico II", Via Università 100, 80055, Portici (Naples), Italy
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Integrated Analytical Methods to Characterize Lipids from Prosopis spp. and Ceratonia siliqua Seed Germ Flour. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1323-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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A comparison of PC oxidation products as detected by MALDI-TOF and ESI-IT mass spectrometry. Chem Phys Lipids 2017; 203:33-45. [PMID: 28063839 DOI: 10.1016/j.chemphyslip.2016.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 11/10/2016] [Accepted: 12/30/2016] [Indexed: 11/20/2022]
Abstract
Oxidized (phospho)lipids are of paramount interest for different reasons: besides their in vivo relevance as markers of inflammatory diseases, they are often needed in the laboratory to study the response of selected cells to oxidized lipids. Mass spectrometry (MS) is nowadays one of the most powerful methods to identify lipid oxidation products. Although MALDI and ESI MS are both widely used, it is so far not clear whether all potential phospholipid oxidation products can be detected by both methods This aspect will be studied here using NaMnO4-oxidized phosphatidylcholine 16:0/18:1 and 16:0/18:2 as simple, but reliable model systems. We will show that chain-shortened products such as aldehydes and carboxylic acids (generated by cleavage at the double bond position) can be easily detected by both ionization methods: without the need of any derivatization. However, primary oxidation products such as hydroperoxides can be predominantly detected by ESI MS while MALDI-TOF MS detects secondary oxidation products derived thereof more sensitively. Potential reasons for these differences will be discussed and put in the context of biological mixture analysis.
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Jakob A, Crawford EA, Gross JH. Detection of polydimethylsiloxanes transferred from silicone-coated parchment paper to baked goods using direct analysis in real time mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2016; 51:298-304. [PMID: 27041660 DOI: 10.1002/jms.3757] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/01/2016] [Accepted: 02/07/2016] [Indexed: 06/05/2023]
Abstract
The non-stick properties of parchment papers are achieved by polydimethylsiloxane (PDMS) coatings. During baking, PDMS can thus be extracted from the silicone-coated parchment into the baked goods. Positive-ion direct analysis in real time (DART) mass spectrometry (MS) is highly efficient for the analysis of PDMS. A DART-SVP source was coupled to a quadrupole-time-of-flight mass spectrometer to detect PDMS on the contact surface of baked goods after use of silicone-coated parchment papers. DART spectra from the bottom surface of baked cookies and pizzas exhibited signals because of PDMS ions of the general formula [(C2H6SiO)n + NH4 ](+) in the m/z 800-1900 range.
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Affiliation(s)
- Andreas Jakob
- Bruker Daltonik GmbH, Fahrenheitstraße 4, 28359, Bremen, Germany
| | - Elizabeth A Crawford
- Institute of Bioanalytical Chemistry, Saarland University, Campus B2 2, 66123, Saarbrücken, Germany
| | - Jürgen H Gross
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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Zeb A. Chemistry and liquid chromatography methods for the analyses of primary oxidation products of triacylglycerols. Free Radic Res 2015; 49:549-64. [PMID: 25824968 DOI: 10.3109/10715762.2015.1022540] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Triacylglycerols (TAGs) are one of the major components of the cells in higher biological systems, which can act as an energy reservoir in the living cells. The unsaturated fatty acid moiety is the key site of oxidation and formation of oxidation compounds. The TAG free radical generates several primary oxidation compounds. These include hydroperoxides, hydroxides, epidioxides, hydroperoxy epidioxides, hydroxyl epidioxides, and epoxides. The presence of these oxidized TAGs in the cell increases the chances of several detrimental processes. For this purpose, several liquid chromatography (LC) methods were reported in their analyses. This review is therefore focused on the chemistry, oxidation, extraction, and the LC methods reported in the analyses of oxidized TAGs. The studies on thin-layer chromatography were mostly focused on the total oxidized TAGs separation and employ hexane as major solvent. High-performance LC (HPLC) methods were discussed in details along with their merits and demerits. It was found that most of the HPLC methods employed isocratic elution with methanol and acetonitrile as major solvents with an ultraviolet detector. The coupling of HPLC with mass spectrometry (MS) highly increases the efficiency of analysis as well as enables reliable structural elucidation. The use of MS was found to be helpful in studying the oxidation chemistry of TAGs and needs to be extended to the complex biological systems.
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Affiliation(s)
- A Zeb
- Department of Biotechnology, University of Malakand , Chakdara , Pakistan
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Gross JH. Polydimethylsiloxane extraction from silicone rubber into baked goods detected by direct analysis in real time mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2015; 21:313-319. [PMID: 26307711 DOI: 10.1255/ejms.1333] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Flexible baking molds and other household utensils are made of polydimethylsiloxane (PDMS), also known as silicone rubber. PDMS is prone to release oligomers upon elongated contact with fats, e.g., in the process of baking dough. Positive-ion direct analysis in real time (DART) mass spectrometry (MS) provides an efficient tool for the analysis of PDMS up to m/z 3000. Here, DART ionization is employed in combination with Fourier transform ion cyclotron resonance MS to detect PDMS released into muffins when baked in silicone rubber baking molds. Intensive signals caused by PDMS do occur in the m/z 700-1500 range of DART mass spectra obtained from the crusty surface of muffins after the use of such silicone rubber molds. In addition, triacylglyceroles (TAGs) present as natural ingredients of the analyzed muffins were detected as [TAG+NH(4)](+) ions.
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Affiliation(s)
- Jürgen H Gross
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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Horn PJ, Chapman KD. Lipidomics in situ: Insights into plant lipid metabolism from high resolution spatial maps of metabolites. Prog Lipid Res 2014; 54:32-52. [DOI: 10.1016/j.plipres.2014.01.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 01/14/2014] [Accepted: 01/14/2014] [Indexed: 12/31/2022]
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11
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Picariello G, Iacomino G, Di Luccia A, D'Agostino L. Mass spectrometric analysis of in vitro nuclear aggregates of polyamines. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:499-504. [PMID: 24497288 DOI: 10.1002/rcm.6807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 12/10/2013] [Accepted: 12/10/2013] [Indexed: 06/03/2023]
Abstract
RATIONALE In the nuclei of eukaryotic cells, polyamines and phosphate ions self-assemble via ionic interactions and hydrogen bonding, generating three families of supramolecular compounds that have been named large (l-), medium (m-) and small (s-) nuclear aggregates of polyamines (NAPs). In a simulated nuclear environment, polyamines and phosphate ions generate the in vitro NAPs (ivNAPs) that share strict structural and functional analogies with their cellular cognates. Mass spectrometric data are expected to provide important structural details of NAPs/ivNAPs. METHODS We used both electrospray ionization (ESI) and nitrocellulose (NC) matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) to support a variety of analytical techniques previously addressed to structurally characterize NAPs/ivNAPs. RESULTS The dominant m/z values of s-ivNAP (m/z 735, 749, 761) are compatible with a defined set of cyclic or linear aggregates. On the basis of the experimental molecular mass (a cluster centred at m/z 2980), the m-ivNAP corresponds to the supramolecular assembly of four modules of s-ivNAPs. No informative mass spectra were obtained for the l-ivNAP. CONCLUSIONS MS data support the models of NAPs that have been inferred by using an array of analytical techniques. NC MALDI-MS contributed much more effectively than ESI-MS to the structural characterization of ivNAPs.
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Affiliation(s)
- Gianluca Picariello
- Istituto di Scienze dell'Alimentazione (ISA) - CNR, Via Roma 64, 83100, Avellino, Italy
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Optimization of Triacylglycerol-estolide Analysis by Matrix-Assisted Laser Desorption/Ionization-Mass Spectrometry. J AM OIL CHEM SOC 2014. [DOI: 10.1007/s11746-014-2437-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Li YJ, Tseng YT, Unnikrishnan B, Huang CC. Gold-nanoparticles-modified cellulose membrane coupled with laser desorption/ionization mass spectrometry for detection of iodide in urine. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9161-9166. [PMID: 23978046 DOI: 10.1021/am4025824] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report an efficient method for the determination of iodide (I(-)) ions by using gold-iodide hybrid cluster ions on gold nanoparticles (Au NPs) modified mixed cellulose ester membrane (Au NPs-MCEM) by pulsed laser desorption/ionization mass spectrometry (LDI-MS). When I(-) ions were deposited and concentrated on the surfaces of Au NPs (32 nm) via strong Au(+)-I(-) interaction on the MECM, the Au NPs-MCEM was observed to function as an efficient surface-assisted LDI substrate with very low background noise. When pulsed laser radiation (355 nm) was applied, I(-) binding to Au NPs ions induced the enhancement of the desorption and ionization efficiency of gold-iodide hybrid cluster ions from the Au NPs surfaces. The reproducibility of the probe for both shot-to-shot and sample-to-sample (both less than 10%) ion production was also improved by the homogeneous nature of the substrate surface. Thus, it allows the accurate and precise quantification of I(-) ions in high-salinity real samples (i.e., edible salt samples and urine) at the nanomolar range. This novel LDI-MS approach provides a simple route for the high-speed analysis of I(-) ions with high sensitivity and selectivity in real biological samples.
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Affiliation(s)
- Yu-Jia Li
- Institute of Bioscience and Biotechnology and ‡Center of Excellence for the Oceans, National Taiwan Ocean University , Keelung, 20224, Taiwan
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Picariello G, Sacchi R, Fierro O, Melck D, Romano R, Paduano A, Motta A, Addeo F. High resolution13CNMR detection of short- and medium-chain synthetic triacylglycerols used in butterfat adulteration. EUR J LIPID SCI TECH 2013. [DOI: 10.1002/ejlt.201300018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Raffaele Sacchi
- Dipartimento di Scienza degli Alimenti; Università di Napoli “Federico II”; Portici; Napoli; Italy
| | - Olga Fierro
- Istituto di Scienze dell'Alimentazione; Consiglio Nazionale delle Ricerche (CNR); Avellino; Italy
| | - Dominique Melck
- Istituto di Chimica Biomolecolare; Consiglio Nazionale delle Ricerche (CNR); Pozzuoli; Napoli; Italy
| | - Raffaele Romano
- Dipartimento di Scienza degli Alimenti; Università di Napoli “Federico II”; Portici; Napoli; Italy
| | - Antonello Paduano
- Dipartimento di Scienza degli Alimenti; Università di Napoli “Federico II”; Portici; Napoli; Italy
| | - Andrea Motta
- Istituto di Chimica Biomolecolare; Consiglio Nazionale delle Ricerche (CNR); Pozzuoli; Napoli; Italy
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Galano E, Fidani M, Baia F, Palomba L, Marino G, Amoresano A. Qualitative screening in doping control by MALDI-TOF/TOF mass spectrometry: A proof-of-evidence. J Pharm Biomed Anal 2012; 71:193-7. [DOI: 10.1016/j.jpba.2012.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 08/01/2012] [Accepted: 08/05/2012] [Indexed: 10/27/2022]
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Liu YC, Chang HT, Chiang CK, Huang CC. Pulsed-laser desorption/ionization of clusters from biofunctional gold nanoparticles: implications for protein detections. ACS APPLIED MATERIALS & INTERFACES 2012; 4:5241-5248. [PMID: 22998761 DOI: 10.1021/am3011934] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this paper, we describe a pulsed-laser desorption/ionization mass spectrometry (LDI-MS) approach for the detection of proteins with femtomolar sensitivity through the analysis of gold (Au) clusters desorbed from aptamer-modified gold nanoparticles (Apt-AuNPs) on a nitrocellulose membrane (NCM). After the target protein (thrombin) was selectively captured by the surface-bound 29-mer thrombin-binding aptamer (TBA(29)), the thrombin/TBA(29)-AuNP complexes were concentrated and deposited onto the NCM to form a highly efficient background-free surface-assisted LDI substrate. Under pulsed laser irradiation (355 nm), the binding of thrombin decreased the desorption and/or ionization efficiencies of the Au atoms from the AuNP surfaces. The resulting decreases in the intensities of the signals for Au clusters in the mass spectra provided a highly amplified target-labeling indicator for the targeted protein. Under optimized conditions, this probe was highly sensitive (limit of detection: ca. 50 fM) and selective (by at least 1000-fold over other proteins) toward thrombin; it also improved reproducibility (<5%) of ion production by presenting a more-homogeneous substrate surface, thereby enabling LDI-based measurements for the accurate and precise quantification of thrombin in human serum. This novel LDI-MS approach allows high-speed analyses of low-abundance thrombin with ultrahigh sensitivity; decorating the AuNP surfaces with other aptamers also allowed amplification of other biological signals.
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Affiliation(s)
- Yin-Chun Liu
- Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
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Vichi S, Cortés-Francisco N, Caixach J. Ultrahigh resolution mass spectrometry and accurate mass measurements for high-throughput food lipids profiling. JOURNAL OF MASS SPECTROMETRY : JMS 2012; 47:1177-1190. [PMID: 22972786 DOI: 10.1002/jms.3017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In the present study, accurate mass measurements by ultrahigh resolution mass spectrometry with Orbitrap-Exactive working at resolving power R: 100,000 (m/z 200, full width at half maximum) with an accuracy better than 2 ppm in all the mass range (m/z 200 to 2000) were used to show a detailed molecular composition of diverse edible oils and fats. Flow injection was used to introduce samples into the mass spectrometer, obtaining a complete analysis of each sample in less than 10 min, including blanks. Meticulous choice of organic solvents and optimization of the ion source and Orbitrap mass analyzer parameters were carried out, in order to achieve reproducible mass spectra giving reliable elemental compositions of the lipid samples and to prevent carry over. More than 200 elemental compositions attributable to diacylglycerols, triacylglycerols (TAGs), and their oxidation products have been found in the spectra of food lipids from different origin. Several compounds with very close molecular mass could only be resolved through ultrahigh resolution, allowing detailed and robust TAG profiling with a high characterization potential.
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Affiliation(s)
- Stefania Vichi
- Food Science and Nutrition Department, XaRTA (Catalonian Reference Network on Food Technology), Pharmaceutical Faculty, University of Barcelona, Avda Joan XXIII, s/n, 08028, Barcelona, Spain.
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Vichi S, Lazzez A, Grati-Kamoun N, Caixach J. Modifications in virgin olive oil glycerolipid fingerprint during olive ripening by MALDI-TOF MS analysis. Lebensm Wiss Technol 2012. [DOI: 10.1016/j.lwt.2012.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Fuchs B, Bresler K, Schiller J. Oxidative changes of lipids monitored by MALDI MS. Chem Phys Lipids 2011; 164:782-95. [PMID: 21964445 DOI: 10.1016/j.chemphyslip.2011.09.006] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 09/03/2011] [Accepted: 09/15/2011] [Indexed: 11/29/2022]
Abstract
Oxidation processes of lipids are of paramount interest from many viewpoints. For instance, oxidation processes are highly important under in vivo conditions because molecules with regulatory functions are generated by oxidation of lipids or free fatty acids. Additionally, many inflammatory diseases are accompanied by lipid oxidation and, therefore, oxidation products are also useful disease (bio)markers. Thus, there is also considerable interest in methods of (oxidized) lipid analysis. Nowadays, soft ionization mass spectrometric (MS) methods are regularly used to study oxidative lipid modifications due to their high sensitivities and the extreme mass resolution. Although electrospray ionization (ESI) MS is so far most popular, applications of matrix-assisted laser desorption and ionization (MALDI) MS are increasing. This review aims to summarize the so far available data on MALDI analyses of oxidized lipids. In addition to model systems, special attention will be paid to the monitoring of oxidized lipids under in vivo conditions, particularly the oxidation of (human) lipoproteins. It is not the aim of this review to praise MALDI as the "best" method but to provide a critical survey of the advantages and drawbacks of this method.
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Affiliation(s)
- Beate Fuchs
- University of Leipzig, Faculty of Medicine, Institute of Medical Physics and Biophysics, Härtelstrasse16/18, Leipzig, Germany
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Cozzolino R, De Giulio B. Application of ESI and MALDI-TOF MS for triacylglycerols analysis in edible oils. EUR J LIPID SCI TECH 2010. [DOI: 10.1002/ejlt.201000429] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fuchs B, Süss R, Schiller J. An update of MALDI-TOF mass spectrometry in lipid research. Prog Lipid Res 2010; 49:450-75. [PMID: 20643161 DOI: 10.1016/j.plipres.2010.07.001] [Citation(s) in RCA: 212] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Revised: 06/29/2010] [Accepted: 07/01/2010] [Indexed: 10/19/2022]
Abstract
Although matrix-assisted laser desorption and ionization (MALDI) mass spectrometry (MS)--often but not exclusively coupled with a time-of-flight (TOF) mass analyzer--is primarily established in the protein field, there is increasing evidence that MALDI MS is also very useful in lipid research: MALDI MS is fast, sensitive, tolerates sample impurities to a relatively high extent and provides very simple mass spectra without major fragmentation of the analyte. Additionally, MALDI MS devices originally purchased for "proteomics" can be used also for lipids without the need of major system alterations. After a short introduction into the method and the related ion-forming process, the MALDI mass spectrometric characteristics of the individual lipid (ranging from completely apolar hydrocarbons to complex glycolipids with the focus on glycerophospholipids) classes will be discussed and the progress achieved in the last years emphasized. Special attention will be paid to quantitative aspects of MALDI MS because this is normally considered to be the "weak" point of the method, particularly if complex lipid mixtures are to be analyzed. Although the detailed role of the matrix is not yet completely clear, it will be also explicitly shown that the careful choice of the matrix is crucial in order to be able to detect all compounds of interest. Two rather recent developments will be highlighted: "Imaging" MS is nowadays widely established and significant interest is paid in this context to the analysis of lipids because lipids ionize particularly well and are, thus, more sensitively detectable in tissue slices than other biomolecules such as proteins. It will also be shown that MALDI MS can be very easily combined with thin-layer chromatography (TLC) allowing the spatially-resolved screening of the entire TLC plate and the detection of lipids with a higher sensitivity than common staining protocols.
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Affiliation(s)
- Beate Fuchs
- University of Leipzig, Medical Department, Institute of Medical Physics and Biophysics, Härtelstrasse 16-18, Germany
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