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Giampà M, Andersen MK, Krossa S, Denti V, Smith A, Moestue SA. Visualization of Small Intact Proteins in Breast Cancer FFPE Tissue. Methods Mol Biol 2023; 2688:161-172. [PMID: 37410292 DOI: 10.1007/978-1-0716-3319-9_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Molecular visualization of metabolites, lipids, and proteins by matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) is becoming an in-demand analytical approach to aid the histopathological analysis of breast cancer. Particularly, proteins seem to play a role in cancer progression, and specific proteins are currently used in the clinic for staging. Formalin-fixed paraffin-embedded (FFPE) tissues are ideal for correlating the molecular markers with clinical outcomes due to their long-term storage. So far, to obtain proteomic information by MSI from this kind of tissue, antigen retrieval and tryptic digestion steps are required. In this chapter, we present a protocol to spatially detect small proteins in tumor and necrotic regions of patient-derived breast cancer xenograft FFPE tissues without employing any on-tissue digestion. This protocol can be used for other kinds of FFPE tissue following specific optimization of the sample preparation phases.
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Affiliation(s)
- Marco Giampà
- Department of Clinical and Molecular Medicine, NTNU - Norwegian University of Science and Technology, Trondheim, Norway.
| | - Maria K Andersen
- Department of Circulation and Medical Imaging, NTNU - Norwegian University of Science and Technology, Trondheim, Norway
| | - Sebastian Krossa
- Department of Circulation and Medical Imaging, NTNU - Norwegian University of Science and Technology, Trondheim, Norway
| | - Vanna Denti
- Proteomics and Metabolomics Unit, Department of Medicine and Surgery, Vedano al Lambro, Italy
| | - Andrew Smith
- Proteomics and Metabolomics Unit, Department of Medicine and Surgery, Vedano al Lambro, Italy
| | - Siver Andreas Moestue
- Department of Clinical and Molecular Medicine, NTNU - Norwegian University of Science and Technology, Trondheim, Norway
- Department of Pharmacy, Nord University, Bodø, Norway
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2
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Paglia G, Smith AJ, Astarita G. Ion mobility mass spectrometry in the omics era: Challenges and opportunities for metabolomics and lipidomics. MASS SPECTROMETRY REVIEWS 2022; 41:722-765. [PMID: 33522625 DOI: 10.1002/mas.21686] [Citation(s) in RCA: 90] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 01/17/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Researchers worldwide are taking advantage of novel, commercially available, technologies, such as ion mobility mass spectrometry (IM-MS), for metabolomics and lipidomics applications in a variety of fields including life, biomedical, and food sciences. IM-MS provides three main technical advantages over traditional LC-MS workflows. Firstly, in addition to mass, IM-MS allows collision cross-section values to be measured for metabolites and lipids, a physicochemical identifier related to the chemical shape of an analyte that increases the confidence of identification. Second, IM-MS increases peak capacity and the signal-to-noise, improving fingerprinting as well as quantification, and better defining the spatial localization of metabolites and lipids in biological and food samples. Third, IM-MS can be coupled with various fragmentation modes, adding new tools to improve structural characterization and molecular annotation. Here, we review the state-of-the-art in IM-MS technologies and approaches utilized to support metabolomics and lipidomics applications and we assess the challenges and opportunities in this growing field.
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Affiliation(s)
- Giuseppe Paglia
- School of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro (MB), Italy
| | - Andrew J Smith
- School of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro (MB), Italy
| | - Giuseppe Astarita
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, District of Columbia, USA
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3
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Denti V, Andersen MK, Smith A, Bofin AM, Nordborg A, Magni F, Moestue SA, Giampà M. Reproducible Lipid Alterations in Patient-Derived Breast Cancer Xenograft FFPE Tissue Identified with MALDI MSI for Pre-Clinical and Clinical Application. Metabolites 2021; 11:577. [PMID: 34564393 PMCID: PMC8467053 DOI: 10.3390/metabo11090577] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/18/2021] [Accepted: 08/24/2021] [Indexed: 12/20/2022] Open
Abstract
The association between lipid metabolism and long-term outcomes is relevant for tumor diagnosis and therapy. Archival material such as formalin-fixed and paraffin embedded (FFPE) tissues is a highly valuable resource for this aim as it is linked to long-term clinical follow-up. Therefore, there is a need to develop robust methodologies able to detect lipids in FFPE material and correlate them with clinical outcomes. In this work, lipidic alterations were investigated in patient-derived xenograft of breast cancer by using a matrix-assisted laser desorption ionization mass spectrometry (MALDI MSI) based workflow that included antigen retrieval as a sample preparation step. We evaluated technical reproducibility, spatial metabolic differentiation within tissue compartments, and treatment response induced by a glutaminase inhibitor (CB-839). This protocol shows a good inter-day robustness (CV = 26 ± 12%). Several lipids could reliably distinguish necrotic and tumor regions across the technical replicates. Moreover, this protocol identified distinct alterations in the tissue lipidome of xenograft treated with glutaminase inhibitors. In conclusion, lipidic alterations in FFPE tissue of breast cancer xenograft observed in this study are a step-forward to a robust and reproducible MALDI-MSI based workflow for pre-clinical and clinical applications.
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Affiliation(s)
- Vanna Denti
- Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, MB, Italy; (V.D.); (A.S.); (F.M.)
| | - Maria K. Andersen
- Department of Circulation and Medical Imaging, NTNU–Norwegian University of Science and Technology, 7491 Trondheim, Norway;
| | - Andrew Smith
- Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, MB, Italy; (V.D.); (A.S.); (F.M.)
| | - Anna Mary Bofin
- Department of Clinical and Molecular Medicine, NTNU–Norwegian University of Science and Technology, 7491 Trondheim, Norway; (A.M.B.); (S.A.M.)
| | - Anna Nordborg
- Department of Biotechnology and Nanomedicine, SINTEF, 7034 Trondheim, Norway;
| | - Fulvio Magni
- Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, MB, Italy; (V.D.); (A.S.); (F.M.)
| | - Siver Andreas Moestue
- Department of Clinical and Molecular Medicine, NTNU–Norwegian University of Science and Technology, 7491 Trondheim, Norway; (A.M.B.); (S.A.M.)
- Department of Pharmacy, Nord University, 8026 Bodø, Norway
| | - Marco Giampà
- Department of Clinical and Molecular Medicine, NTNU–Norwegian University of Science and Technology, 7491 Trondheim, Norway; (A.M.B.); (S.A.M.)
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4
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Kobylis P, Stepnowski P, Caban M. Review of the applicability of ionic liquid matrices for the quantification of small molecules by MALDI MS. Microchem J 2021. [DOI: 10.1016/j.microc.2021.105983] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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5
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Denti V, Piga I, Guarnerio S, Clerici F, Ivanova M, Chinello C, Paglia G, Magni F, Smith A. Antigen Retrieval and Its Effect on the MALDI-MSI of Lipids in Formalin-Fixed Paraffin-Embedded Tissue. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:1619-1624. [PMID: 32678590 PMCID: PMC8009503 DOI: 10.1021/jasms.0c00208] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Formalin-fixed paraffin-embedded (FFPE) tissue represents the primary source of clinical tissue and is routinely used in MALDI-MSI studies. However, it is not particularly suitable for lipidomics imaging given that many species are depleted during tissue processing. Irrespective, a number of solvent-resistant lipids remain, but their extraction may be hindered by the cross-link between proteins. Therefore, an antigen retrieval step could enable the extraction of a greater number of lipids and may provide information that is complementary to that which can be obtained from other biomolecules, such as proteins. In this short communication, we aim to address the effect of performing antigen retrieval prior to MALDI-MSI of lipids in FFPE tissue. As a result, an increased number of lipid signals could be detected and may have derived from lipid species that are known to be implicated in the lipid-protein cross-linking that is formed as a result of formalin fixation. Human renal cancer tissue was used as a proof of concept to determine whether using these detected lipid signals were also able to highlight the histopathological regions that were present. These preliminary findings may highlight the potential to enhance the clinical relevance of the lipidomic information obtained from FFPE tissue.
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Affiliation(s)
- Vanna Denti
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Isabella Piga
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Sonia Guarnerio
- Biomolecular
Sciences Research Centre, Sheffield-Hallam
University, City Campus, Howard Street, Sheffield S1 1WB, United Kingdom
| | - Francesca Clerici
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Mariia Ivanova
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Clizia Chinello
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Giuseppe Paglia
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Fulvio Magni
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
| | - Andrew Smith
- Clinical
Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, Vedano al Lambro 20854, Italy
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6
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Kobylis P, Lis H, Stepnowski P, Caban M. Spectroscopic verification of ionic matrices for MALDI analysis. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Zhao X, Cai P, Sun C, Pan Y. Application of ionic liquids in separation and analysis of carbohydrates: State of the art and future trends. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.12.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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8
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Leopold J, Popkova Y, Engel KM, Schiller J. Recent Developments of Useful MALDI Matrices for the Mass Spectrometric Characterization of Lipids. Biomolecules 2018; 8:biom8040173. [PMID: 30551655 PMCID: PMC6316665 DOI: 10.3390/biom8040173] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/06/2018] [Accepted: 12/10/2018] [Indexed: 12/24/2022] Open
Abstract
Matrix-assisted laser desorption/ionization (MALDI) is one of the most successful “soft” ionization methods in the field of mass spectrometry and enables the analysis of a broad range of molecules, including lipids. Although the details of the ionization process are still unknown, the importance of the matrix is commonly accepted. Both, the development of and the search for useful matrices was, and still is, an empirical process, since properties like vacuum stability, high absorption at the laser wavelength, etc. have to be fulfilled by a compound to become a useful matrix. This review provides a survey of successfully used MALDI matrices for the lipid analyses of complex biological samples. The advantages and drawbacks of the established organic matrix molecules (cinnamic or benzoic acid derivatives), liquid crystalline matrices, and mixtures of common matrices will be discussed. Furthermore, we will deal with nanocrystalline matrices, which are most suitable to analyze small molecules, such as free fatty acids. It will be shown that the analysis of mixtures and the quantitative analysis of small molecules can be easily performed if the matrix is carefully selected. Finally, some basic principles of how useful matrix compounds can be “designed” de novo will be introduced.
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Affiliation(s)
- Jenny Leopold
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstr. 16/18, Leipzig University, D-04107 Leipzig, Germany.
| | - Yulia Popkova
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstr. 16/18, Leipzig University, D-04107 Leipzig, Germany.
| | - Kathrin M Engel
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstr. 16/18, Leipzig University, D-04107 Leipzig, Germany.
| | - Jürgen Schiller
- Faculty of Medicine, Institute for Medical Physics and Biophysics, Härtelstr. 16/18, Leipzig University, D-04107 Leipzig, Germany.
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9
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Maes E, Clerens S, Dyer JM, Deb-Choudhury S. Improved Detection and Fragmentation of Disulphide-Linked Peptides. Methods Protoc 2018; 1:mps1030033. [PMID: 31164574 PMCID: PMC6481087 DOI: 10.3390/mps1030033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 12/04/2022] Open
Abstract
Characterisation of peptides containing intact disulphide bonds (DSBs) via mass spectrometry is challenging. Our study demonstrates that the addition of aniline to alpha-cyano-4-hydroxycinnamic acid improves detection and fragmentation of complex DSB peptides by matrix-assisted laser desorption/ionization, tandem time-of-flight mass spectrometry (MALDI-TOF-TOF MS). This improved assignment will be a significant new tool when a simple screening to confirm the DSB existence is required.
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Affiliation(s)
- Evelyne Maes
- Food & Bio-Based Products, AgResearch Ltd., 1365 Springs Road, Lincoln 7674, New Zealand.
| | - Stefan Clerens
- Food & Bio-Based Products, AgResearch Ltd., 1365 Springs Road, Lincoln 7674, New Zealand.
- Biomolecular Interaction Centre, University of Canterbury, Christchurch 8140, New Zealand.
| | - Jolon M Dyer
- Food & Bio-Based Products, AgResearch Ltd., 1365 Springs Road, Lincoln 7674, New Zealand.
- Biomolecular Interaction Centre, University of Canterbury, Christchurch 8140, New Zealand.
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand.
- Wine, Food & Molecular Biosciences, Lincoln University, Lincoln 7674, New Zealand.
| | - Santanu Deb-Choudhury
- Food & Bio-Based Products, AgResearch Ltd., 1365 Springs Road, Lincoln 7674, New Zealand.
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10
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Abdelhamid HN. Ionic Liquid-Assisted Laser Desorption/Ionization-Mass Spectrometry: Matrices, Microextraction, and Separation. Methods Protoc 2018; 1:E23. [PMID: 31164566 PMCID: PMC6526421 DOI: 10.3390/mps1020023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 12/16/2022] Open
Abstract
Ionic liquids (ILs) have advanced a variety of applications, including matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS). ILs can be used as matrices and solvents for analyte extraction and separation prior to analysis using laser desorption/ionization-mass spectrometry (LDI-MS). Most ILs show high stability with negligible sublimation under vacuum, provide high ionization efficiency, can be used for qualitative and quantitative analyses with and without internal standards, show high reproducibility, form homogenous spots during sampling, and offer high solvation efficiency for a wide range of analytes. Ionic liquids can be used as solvents and pseudo-stationary phases for extraction and separation of a wide range of analytes, including proteins, peptides, lipids, carbohydrates, pathogenic bacteria, and small molecules. This review article summarizes the recent advances of ILs applications using MALDI-MS. The applications of ILs as matrices, solvents, and pseudo-stationary phases, are also reviewed.
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11
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Kendall AC, Koszyczarek MM, Jones EA, Hart PJ, Towers M, Griffiths CEM, Morris M, Nicolaou A. Lipidomics for translational skin research: A primer for the uninitiated. Exp Dermatol 2018; 27:721-728. [DOI: 10.1111/exd.13558] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Alexandra C. Kendall
- Laboratory for Lipidomics and Lipid Biology; Division of Pharmacy and Optometry; School of Health Sciences; Faculty of Biology, Medicine and Health; University of Manchester; Manchester Academic Health Science Centre; Manchester UK
| | - Marta M. Koszyczarek
- Laboratory for Lipidomics and Lipid Biology; Division of Pharmacy and Optometry; School of Health Sciences; Faculty of Biology, Medicine and Health; University of Manchester; Manchester Academic Health Science Centre; Manchester UK
| | | | | | | | - Christopher E. M. Griffiths
- Dermatology Centre; Salford Royal Hospital; University of Manchester; Manchester Academic Health Science Centre; Manchester UK
| | | | - Anna Nicolaou
- Laboratory for Lipidomics and Lipid Biology; Division of Pharmacy and Optometry; School of Health Sciences; Faculty of Biology, Medicine and Health; University of Manchester; Manchester Academic Health Science Centre; Manchester UK
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12
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Calvano CD, Monopoli A, Cataldi TRI, Palmisano F. MALDI matrices for low molecular weight compounds: an endless story? Anal Bioanal Chem 2018; 410:4015-4038. [DOI: 10.1007/s00216-018-1014-x] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/27/2018] [Accepted: 03/08/2018] [Indexed: 10/17/2022]
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13
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Guo M, Zhang L, Du Y, Du W, Liu D, Guo C, Pan Y, Tang D. Enrichment and Quantitative Determination of 5-(Hydroxymethyl)-2′-deoxycytidine, 5-(Formyl)-2′-deoxycytidine, and 5-(Carboxyl)-2′-deoxycytidine in Human Urine of Breast Cancer Patients by Magnetic Hyper-Cross-Linked Microporous Polymers Based on Polyionic Liquid. Anal Chem 2018; 90:3906-3913. [DOI: 10.1021/acs.analchem.7b04755] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Mengzhe Guo
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Liyan Zhang
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Yan Du
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Wencheng Du
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Dantong Liu
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
| | - Cheng Guo
- Cancer Institute,
The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Yuanjiang Pan
- Department of Chemistry, Zhejiang University, Hangzhou 310009, China
| | - Daoquan Tang
- Jiangsu Key Laboratory
of New Drug Research and Clinical Pharmacy, Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
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14
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Matrix-Assisted Laser Desorption/Ionisation Mass Spectrometry Imaging in the Study of Gastric Cancer: A Mini Review. Int J Mol Sci 2017; 18:ijms18122588. [PMID: 29194417 PMCID: PMC5751191 DOI: 10.3390/ijms18122588] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 11/25/2017] [Accepted: 11/28/2017] [Indexed: 02/07/2023] Open
Abstract
Gastric cancer (GC) is one of the leading causes of cancer-related deaths worldwide and the disease outcome commonly depends upon the tumour stage at the time of diagnosis. However, this cancer can often be asymptomatic during the early stages and remain undetected until the later stages of tumour development, having a significant impact on patient prognosis. However, our comprehension of the mechanisms underlying the development of gastric malignancies is still lacking. For these reasons, the search for new diagnostic and prognostic markers for gastric cancer is an ongoing pursuit. Modern mass spectrometry imaging (MSI) techniques, in particular matrix-assisted laser desorption/ionisation (MALDI), have emerged as a plausible tool in clinical pathology as a whole. More specifically, MALDI-MSI is being increasingly employed in the study of gastric cancer and has already elucidated some important disease checkpoints that may help us to better understand the molecular mechanisms underpinning this aggressive cancer. Here we report the state of the art of MALDI-MSI approaches, ranging from sample preparation to statistical analysis, and provide a complete review of the key findings that have been reported in the literature thus far.
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15
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Organic matrices, ionic liquids, and organic matrices@nanoparticles assisted laser desorption/ionization mass spectrometry. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.01.012] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Kooijman PC, Kok S, Honing M. Independent assessment of matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) sample preparation quality: Effect of sample preparation on MALDI-MS of synthetic polymers. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2017; 31:362-370. [PMID: 27870135 DOI: 10.1002/rcm.7798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) provides detailed and in-depth information about the molecular characteristics of synthetic polymers. To obtain the most accurate results the sample preparation parameters should be chosen to suit the sample and the aim of the experiment. Because the underlying principles of MALDI are still not fully known, a priori determination of optimal sample preparation protocols is often not possible. METHODS Employing an automated sample preparation quality assessment method recently presented by us we quantified the sample preparation quality obtained using various sample preparation protocols. Six conventional matrices with and without added potassium as a cationization agent and six ionic liquid matrices (ILMs) were assessed using poly(ethylene glycol) (PEG), polytetrahydrofuran (PTHF) and poly(methyl methacrylate) (PMMA) as samples. All sample preparation protocols were scored and ranked based on predefined quality parameters and spot-to-spot repeatability. RESULTS Clearly distinctive preferences were observed in matrix identity and cationization agent for PEG, PTHF and PMMA, as the addition of an excess of potassium cationization agent results in an increased score for PMMA and a contrasting matrix-dependent effect for PTHF and PEG. The addition of excess cationization agent to sample mixtures dissipates any overrepresentation of high molecular weight polymer species. Our results show reduced ionization efficiency and similar sample deposit homogeneity for all tested ILMs, compared with well-performing conventional MALDI matrices. CONCLUSIONS The results published here represent a start in the unsupervised quantification of sample preparation quality for MALDI samples. This method can select the best sample preparation parameters for any synthetic polymer sample and the results can be used to formulate hypotheses on MALDI principles. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Pieter C Kooijman
- DSM Resolve, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
- Division of BioAnalytical Chemistry, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
- M4I Institute, Maastricht University, Universiteitssingel 50, 6229 ER, Maastricht, The Netherlands
| | - Sander Kok
- DSM Resolve, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | - Maarten Honing
- DSM Resolve, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
- Division of BioAnalytical Chemistry, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
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17
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Abstract
Matrix-assisted laser desorption ionization (MALDI) mass spectrometry (MS) is now a well-established technique for imaging analysis of sectioned biological tissues. One of the growing areas of interest is in the analysis of skin. MALDI-MSI can provide a wealth of information from within sections of skin. This includes information on the distribution of pharmaceuticals following topical treatments, through to the examination of the composition of different skin layers and studies of proteomic, lipidomic, and metabolomic responses to disease, wounds, and external stimuli. Here, we describe the handling procedures, preparatory treatment, and mass spectrometry setup required for the MALDI MSI analysis of lipids within human skin samples.
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Affiliation(s)
- Philippa J Hart
- Waters Corporation, Stamford Ave., Altrincham Road, Wilmslow, SK9 4AX, UK.
| | - Malcolm R Clench
- Centre for Mass Spectrometry Imaging, Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
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18
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Calvano CD, Cataldi TRI, Kögel JF, Monopoli A, Palmisano F, Sundermeyer J. Superbasic alkyl-substituted bisphosphazene proton sponges: a new class of deprotonating matrices for negative ion matrix-assisted ionization/laser desorption mass spectrometry of low molecular weight hardly ionizable analytes. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1680-1686. [PMID: 28328038 DOI: 10.1002/rcm.7604] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 05/07/2016] [Accepted: 05/08/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE Here hardly ionizable and low molecular weight compounds are detected in negative ion mode by using novel superbasic proton sponges based on 1,8-bisphosphazenylnaphthalene (PN) as MALDI matrices. Among the selected proton sponges, 1,8-bis(trispyrrolidinophosphazenyl)naphthalene (TPPN) has shown the best behaviour as matrix since it allows the direct detection of intact cholesterol without derivatization also in real challenging samples. METHODS Very weakly acidic compounds such as sterols, steroids, fatty alcohols and saccharides were detected in reflectron negative ion mode by a MALDI TOF/TOF system equipped with a neodymium-doped yttrium lithium fluoride (Nd:YLF) laser (345 nm) with typical mass accuracy of 10 ppm. MS/MS experiments were performed by using ambient air as the collision gas. RESULTS Contrary to traditional MALDI matrices, superbasic proton sponges allowed the easy deprotonation of an alcohol functional group without a previous chemical derivatization step. Experimental evidence indicates that analyte deprotonation is achieved in the condensed phase, i.e. PN superbasic proton sponges operate according to a recently proposed model named matrix assisted ionization/laser desorption (MAILD). A detection limit of 3 pmol/spot of cholesterol (model compound) with a signal-to-noise ratio ≥ 10 was typically obtained. CONCLUSIONS For the first time, the usefulness of novel superbasic proton sponges is demonstrated for MALDI detection of hardly ionizable compounds such as sterols, steroids, fatty alcohols and saccharides. The leading candidate TPPN has been successfully applied for negative ion MAILD-MS analysis of cholesterol, fatty acids and phospholipids in egg yolk and brain tissue extracts. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- C D Calvano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
| | - T R I Cataldi
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
| | - J F Kögel
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Straße, 35032, Marburg, Germany
| | - A Monopoli
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
| | - F Palmisano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
- Centro di Ricerca Interdipartimentale S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Campus Universitario, Via E. Orabona 4, 70126, Bari, Italy
| | - J Sundermeyer
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Straße, 35032, Marburg, Germany
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Wiangnon K, Cramer R. Liquid MALDI MS Analysis of Complex Peptide and Proteome Samples. J Proteome Res 2016; 15:2998-3008. [DOI: 10.1021/acs.jproteome.6b00148] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kanjana Wiangnon
- Department
of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, United Kingdom
| | - Rainer Cramer
- Department
of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, United Kingdom
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20
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Abdelhamid HN. Ionic liquids for mass spectrometry: Matrices, separation and microextraction. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.12.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
Ionic liquids (ILs) are entirely composed of ions and they possess fascinating properties, including low volatility, tunable viscosity, miscibility and electrolytic conductivity, which make them promising alternatives to traditional organic solvents used in sample preparation. The recent surge in the number of publications clearly indicates an increasing interest of the analytical and bioanalytical community toward these exciting and unique solvents. This article highlights the recent advances in the use of ILs as extraction solvents, as materials for separation and preconcentration in chromatographic techniques, and as matrices in mass spectrometric techniques for bioassays in biocomplex samples. We also briefly discuss the potential applications of ILs in biocatalysis.
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for 2009-2010. MASS SPECTROMETRY REVIEWS 2015; 34:268-422. [PMID: 24863367 PMCID: PMC7168572 DOI: 10.1002/mas.21411] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/07/2023]
Abstract
This review is the sixth update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2010. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, arrays and fragmentation are covered in the first part of the review and applications to various structural typed constitutes the remainder. The main groups of compound that are discussed in this section are oligo and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Many of these applications are presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis.
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Affiliation(s)
- David J. Harvey
- Department of BiochemistryOxford Glycobiology InstituteUniversity of OxfordOxfordOX1 3QUUK
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Guo M, Zhai Y, Guo C, Liu Y, Tang D, Pan Y. A new strategy to determine the protein mutation site using matrix-assisted laser desorption ionization in-source decay: Derivatization by ionic liquid. Anal Chim Acta 2015; 865:31-8. [DOI: 10.1016/j.aca.2015.01.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 01/27/2015] [Accepted: 01/29/2015] [Indexed: 10/24/2022]
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24
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Bencivenni M, Faccini A, Zecchi R, Boscaro F, Moneti G, Dossena A, Sforza S. Electrospray MS and MALDI imaging show that non-specific lipid-transfer proteins (LTPs) in tomato are present as several isoforms and are concentrated in seeds. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:1264-71. [PMID: 25476944 DOI: 10.1002/jms.3454] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 07/08/2014] [Accepted: 07/31/2014] [Indexed: 05/24/2023]
Abstract
Non-specific lipid-transfer proteins (nsLTPs) are major human allergens in many plant species, albeit their role in plant biochemistry is still undefined. They are found in many plant species, either as one or several isoforms according to the species, and usually they are found to concentrate in the outer part of the fruits. In this work, the characterization of tomato nsLTP isoforms was performed on the three main fractions of Piccadilly tomato fruit (peel, pulp and seeds) by using ultracentrifuge devices with molecular cut-off able to retain proteins with molecular weight typical of plant LTPs. The isolated proteins were further analysed by LC-MS, in order to investigate the occurrence and the localization of tomato LTP isoforms. The chromatographic retention times, the molecular masses, the presence of eight cysteine residues in their tertiary structures and the sequence information obtained by MS, although not complete yet, allowed us to identify four different LTP isoforms, not yet reported in the literature, which were found to be concentrated in the seed fractions. None of the molecular masses of these potential LTPs was already present in the UniProtKB/SwissProt database. MALDI imaging experiments confirmed their presence and main localization in seeds, although the actual data hinted at their presence around seeds, rather than exactly in them. These data hint to a complicated scenario concerning LTP proteins in tomato.
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Affiliation(s)
- Mariangela Bencivenni
- Department of Food Science, University of Parma, Viale delle Scienze 95a, I-43124, Parma, Italy
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Al Ghafly H, Siraj N, Das S, Regmi BP, Magut PKS, Galpothdeniya WIS, Murray KK, Warner IM. GUMBOS matrices of variable hydrophobicity for matrix-assisted laser desorption/ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:2307-2314. [PMID: 25279744 DOI: 10.1002/rcm.7027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/19/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
RATIONALE Detection of hydrophobic peptides remains a major obstacle for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). This stems from the fact that most matrices for MALDI are hydrophilic and therefore have low affinities for hydrophobic peptides. Herein, 1-aminopyrene (AP) and AP-derived group of uniform materials based on organic salts (GUMBOS) as novel matrices for MALDI-MS analyses of peptides were investigated for hydrophobic and hydrophilic peptides. METHODS A number of solid-phase AP-based GUMBOS are synthesized with variable hydrophobicity simply by changing the counterions. Structures were confirmed by use of (1)H NMR and electrospray ionization mass spectrometry (ESI-MS). 1-Octanol/water partition coefficients (Ko/w) were used to measure the hydrophobicity of the matrices. A dried-droplet method was used for sample preparation. All spectra were obtained using a MALDI-TOF mass spectrometer in positive ion reflectron mode. RESULTS A series of AP-based GUMBOS was synthesized including [AP][chloride] ([AP][Cl]), [AP][ascorbate] ([AP][Asc]) and [AP][bis(trifluoromethane)sulfonimide] ([AP][NTf2]). The relative hydrophobicities of these compounds and α-cyano-4-hydroxycinnamic acid (CHCA, a common MALDI matrix) indicated that AP-based GUMBOS can be tuned to be much more hydrophobic than CHCA. A clear trend is observed between the signal intensities of hydrophobic peptides and hydrophobicity of the matrix. CONCLUSIONS MALDI matrices of GUMBOS with tunable hydrophobicities are easily obtained simply by varying the counterion. We have found that hydrophobic matrix materials are very effective for MALDI determination of hydrophobic peptides and, similarly, the more hydrophilic peptides displayed greater intensity in the more hydrophilic matrix.
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Affiliation(s)
- Hashim Al Ghafly
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, USA
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26
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Gabriel SJ, Pfeifer D, Schwarzinger C, Panne U, Weidner SM. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometric imaging of synthetic polymer sample spots prepared using ionic liquid matrices. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:489-498. [PMID: 24497287 DOI: 10.1002/rcm.6810] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/17/2013] [Accepted: 12/17/2013] [Indexed: 06/03/2023]
Abstract
RATIONALE Polymer sample spots for matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) prepared by the dried-droplet method often reveal ring formation accompanied by possible segregation of matrix and sample molecules as well as of the polymer homologs itself. Since the majority of sample spots are prepared by this simple and fast method, a matrix or sample preparation method that excludes such segregation has to be found. METHODS Three different ionic liquid matrices based on conventionally used aromatic compounds for MALDI-TOF MS were prepared. The formation of ionic liquids was proven by (1) H NMR spectroscopy. MALDI-Imaging mass spectrometry was applied to monitor the homogeneity. RESULTS Our results show a superior sample spot homogeneity using ionic liquid matrices. Spots could be sampled several times without visible differences in the mass spectra. A frequently observed loss of matrix in the mass spectrometer vacuum was not observed. The necessary laser irradiance was reduced, which resulted in less polymer fragmentation. CONCLUSIONS Ionic liquid matrices can be used to overcome segregation, a typical drawback of conventional MALDI dried-droplet preparations. Homogeneous sample spots are easy to prepare, stable in the MS vacuum and, thereby, improve the reproducibility of MALDI.
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Affiliation(s)
- Stefan J Gabriel
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Strasse 11, D-12489, Berlin, Germany
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27
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Calvano CD, De Ceglie C, Zambonin CG. Proteomic analysis of complex protein samples by MALDI-TOF mass spectrometry. Methods Mol Biol 2014; 1129:365-380. [PMID: 24648088 DOI: 10.1007/978-1-62703-977-2_27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
MALDI MS has become a technique of considerable impact on many fields, from proteomics to lipidomics, including polymer analysis and, more recently, even low molecular weight analytes due to the introduction of matrix-less ionization techniques (e.g., DIOS) or new matrices such as ionic liquids, proton sponges, and metal nanoparticles. However, protein identification by peptide mass fingerprint (PMF) still remains the main routine application. In the last few years, MALDI MS has played an emerging role in food chemistry especially in detection of food adulterations, characterization of food allergens, and investigation of protein structural modifications, induced by various industrial processes that could be detrimental for food quality and safety. Sample handling and pretreatment can be very different depending on the physical state, liquid or solid, of the analyzed matrices. Here, we describe simple protocols for protein extraction and MALDI MS analysis of liquid (milk) and solid (hazelnuts) samples taken as model. A classic approach based on a preliminary SDS gel electrophoresis separation followed by in-gel digestion and a faster approach based on in-solution digestion of whole samples are described and compared.
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Affiliation(s)
- Cosima Damiana Calvano
- Dipartimento di Chimica, Università degli Studi di Bari "Aldo Moro", Via Orabona, 4, 70126, Bari, Italy,
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28
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Monopoli A, Calvano CD, Nacci A, Palmisano F. Boronic acid chemistry in MALDI MS: a step forward in designing a reactive matrix with molecular recognition capabilities. Chem Commun (Camb) 2014; 50:4322-4. [DOI: 10.1039/c4cc01185f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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29
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Calvano CD, Monopoli A, Ditaranto N, Palmisano F. 1,8-bis(dimethylamino)naphthalene/9-aminoacridine: a new binary matrix for lipid fingerprinting of intact bacteria by matrix assisted laser desorption ionization mass spectrometry. Anal Chim Acta 2013; 798:56-63. [PMID: 24070484 DOI: 10.1016/j.aca.2013.08.050] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/29/2013] [Accepted: 08/30/2013] [Indexed: 10/26/2022]
Abstract
The effectiveness of a novel binary matrix composed of 1,8-bis(dimethylamino)naphthalene (DMAN; proton sponge) and 9-aminoacridine (9AA) for the direct lipid analysis of whole bacterial cells by matrix assisted laser desorption ionization mass spectrometry (MALDI MS) is demonstrated. Deprotonated analyte signals nearly free of matrix-related ions were observed in negative ion mode. The effect of the most important factors (laser energy, pulse voltage, DMAN/9AA ratio, analyte/matrix ratio) was investigated using a Box-Behnken response surface design followed by multi-response optimization in order to simultaneously maximize signal-to-noise (S/N) ratio and resolution. The chemical surface composition of single or mixed matrices was explored by X-ray photoelectron spectroscopy (XPS). Moreover, XPS imaging was used to map the spatial distribution of a model phospholipid in single or binary matrices. The DMAN/9AA binary matrix was then successfully applied to the analysis of intact Gram positive (Lactobacillus sanfranciscensis) or Gram negative (Escherichia coli) microorganisms. About fifty major membrane components (free fatty acids, mono-, di- and tri-glycerides, phospholipids, glycolipids and cardiolipins) were quickly and easily detected over a mass range spanning from ca. 200 to ca. 1600 m/z. Moreover, mass spectra with improved S/N ratio (compared to single matrices), reduced chemical noise and no formation of matrix-clusters were invariably obtained demonstrating the potential of this binary matrix to improve sensitivity.
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Affiliation(s)
- C D Calvano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona, 4, 70126 Bari, Italy.
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Dertinger JJ, Walker AV. Towards the rational design of ionic liquid matrices for secondary ion mass spectrometry: role of the anion. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1288-1295. [PMID: 23722728 DOI: 10.1007/s13361-013-0666-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 04/23/2013] [Accepted: 05/05/2013] [Indexed: 06/02/2023]
Abstract
The role of the ionic liquid (IL) anion structure on analyte signal enhancements has been systematically investigated in secondary ion mass spectrometry (SIMS) using a variety of samples, including lipids, sterols, polymers, and peptides. Twenty-four ILs were synthesized. The 12 matrix acids were cinnamic acid derivatives. Two bases were employed: 1-methylimidazole and tripropylamine. Three matrices, methylimmidazolium o-coumarate, tripropylammonium o-coumarate, and tripropylammonium 3,4,5-trimethoxycinnamate, were "universal" matrices enhancing all analytes tested. The pKa of the matrix acid does not appear to have a strong effect on analyte ion intensities. Rather, it is observed that a single hydroxyl group on the anion aromatic ring leads to significantly increased molecular ion intensities. No analyte signal enhancements were observed for -CH3, -CF3 and -OCH3 groups present on the aromatic ring. The position of the -OH group on the aromatic ring also alters molecular ion intensity enhancements. As well as the chemical identity and position of substituents, the number of moieties on the aromatic ring may affect the analyte signal enhancements observed. These observations suggest that the activation of the IL anion aromatic ring is important for optimizing analyte signal intensities. The implications for SIMS imaging of complex structures, such as biological samples, are discussed.
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Affiliation(s)
- Jennifer J Dertinger
- Department of Materials Science and Engineering, University of Texas at Dallas, Richardson, TX 75080, USA
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Alley WR, Mann BF, Novotny MV. High-sensitivity analytical approaches for the structural characterization of glycoproteins. Chem Rev 2013; 113:2668-732. [PMID: 23531120 PMCID: PMC3992972 DOI: 10.1021/cr3003714] [Citation(s) in RCA: 239] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- William R. Alley
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
| | - Benjamin F. Mann
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
| | - Milos V. Novotny
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
- Indiana University School of Medicine, Indiana University, Indianapolis, Indiana, United States
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32
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Abdelhamid HN, Gopal J, Wu HF. Synthesis and application of ionic liquid matrices (ILMs) for effective pathogenic bacteria analysis in matrix assisted laser desorption/ionization (MALDI-MS). Anal Chim Acta 2013; 767:104-11. [DOI: 10.1016/j.aca.2012.12.054] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 12/25/2012] [Accepted: 12/26/2012] [Indexed: 10/27/2022]
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Ionic liquid applications in peptide chemistry: synthesis, purification and analytical characterization processes. Molecules 2012; 17:4158-85. [PMID: 22481538 PMCID: PMC6268249 DOI: 10.3390/molecules17044158] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 03/22/2012] [Accepted: 03/28/2012] [Indexed: 11/17/2022] Open
Abstract
This review aims to provide a comprehensive overview of the recent advances made in the field of ionic liquids in peptide chemistry and peptide analytics.
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35
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MALDI-MS imaging of lipids in ex vivo human skin. Anal Bioanal Chem 2011; 401:115-25. [DOI: 10.1007/s00216-011-5090-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 05/03/2011] [Accepted: 05/08/2011] [Indexed: 10/18/2022]
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Przybylski C, Blin F, Jarroux N. Toward a More Accurate Structural Determination of High Molecular Weight Polyrotaxanes Based on Cyclodextrins by MALDI−TOF MS. Macromolecules 2011. [DOI: 10.1021/ma102641q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cédric Przybylski
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d’Evry-Val-d’Essonne, 91025 Evry, France
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, CNRS UMR 8587, Université Evry-Val-d’Essonne, Bâtiment Maupertuis, bd F. Mitterrand, 91025 Evry, France
| | - François Blin
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d’Evry-Val-d’Essonne, 91025 Evry, France
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, CNRS UMR 8587, Université Evry-Val-d’Essonne, Bâtiment Maupertuis, bd F. Mitterrand, 91025 Evry, France
| | - Nathalie Jarroux
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d’Evry-Val-d’Essonne, 91025 Evry, France
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, CNRS UMR 8587, Université Evry-Val-d’Essonne, Bâtiment Maupertuis, bd F. Mitterrand, 91025 Evry, France
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Matrix-assisted laser desorption ionization imaging mass spectrometry in lipidomics. Anal Bioanal Chem 2011; 401:29-51. [DOI: 10.1007/s00216-011-4696-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 12/29/2010] [Accepted: 01/17/2011] [Indexed: 12/12/2022]
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38
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Calvano CD, Carulli S, Palmisano F. 1H-pteridine-2,4-dione (lumazine): a new MALDI matrix for complex (phospho)lipid mixtures analysis. Anal Bioanal Chem 2010; 398:499-507. [PMID: 20593166 DOI: 10.1007/s00216-010-3927-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 06/10/2010] [Accepted: 06/14/2010] [Indexed: 10/19/2022]
Abstract
Nowadays, matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry represents an emerging and versatile tool for analysis of lipids. However, direct (i.e., with no previous separation of lipid classes) analysis of crude extracts containing a complex mixture of lipids (a problem typically encountered in shotgun lipidomics) is still a quite challenging task using a conventional MALDI matrix such as 2,5-dihydroxybenzoic acid (DHB). Indeed, in the presence of phospholipids containing quaternary ammonium groups, such as phosphatidylcholines and sphingomyelins, strong ionization-suppression effects are experienced especially in positive ion mode. To overcome this limitation, lumazine (1H-pteridine-2,4-dione) was evaluated as an alternative matrix. Lumazine in the solid state showed an absorption maximum at 350 nm, ionizes/desorbs without appreciable decomposition and extensive cluster formation, and can be used in both ion modes. In positive ion mode, the main species were M(*+) and 2M(*+) radical cations and cationized species ([M+H](+), [M+Na](+), [M+2Na+2Li-3H](+)). In negative ion mode, the main signals observed were the deprotonated molecular ion and the radical anion. The signal-to-noise ratio for phosphatidylglycerols and phosphatidylethanolamines using lumazine was almost 1 order of magnitude higher than that observed for DHB. Lumazine was successfully used for MALDI analysis (positive and negative ion modes) of crude lipid extracts of milk, soymilk, and hen egg, where phosphatidylethanolamines, phosphatidylserines, and phosphatidylinositols could additionally be detected.
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Affiliation(s)
- Cosima D Calvano
- Dipartimento di Chimica & Centro Interdipartimentale di Ricerca S.M.A.R.T., Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
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Affiliation(s)
- Steffen M. Weidner
- Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Richard-Willstaetter-Strasse 11, Germany, and Department of Chemistry, Wayne State University, 5101 Cass Avenue, 33 Chemistry, Detroit, Michigan 48202
| | - Sarah Trimpin
- Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Richard-Willstaetter-Strasse 11, Germany, and Department of Chemistry, Wayne State University, 5101 Cass Avenue, 33 Chemistry, Detroit, Michigan 48202
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40
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Towers MW, Mckendrick JE, Cramer R. Introduction of 4-Chloro-α-cyanocinnamic Acid Liquid Matrices for High Sensitivity UV-MALDI MS. J Proteome Res 2010; 9:1931-40. [DOI: 10.1021/pr901089j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mark W. Towers
- Department of Chemistry and The BioCentre, University of Reading, Reading, United Kingdom
| | - John E. Mckendrick
- Department of Chemistry and The BioCentre, University of Reading, Reading, United Kingdom
| | - Rainer Cramer
- Department of Chemistry and The BioCentre, University of Reading, Reading, United Kingdom
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Gruendling T, Weidner S, Falkenhagen J, Barner-Kowollik C. Mass spectrometry in polymer chemistry: a state-of-the-art up-date. Polym Chem 2010. [DOI: 10.1039/b9py00347a] [Citation(s) in RCA: 194] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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