151
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Dufresne M, Patterson NH, Lauzon N, Chaurand P. Assessing the Potential of Metal-Assisted Imaging Mass Spectrometry in Cancer Research. Adv Cancer Res 2016; 134:67-84. [PMID: 28110656 DOI: 10.1016/bs.acr.2016.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In the last decade, imaging mass spectrometry (IMS) has been the primary tool for biomolecular imaging. While it is possible to map a wide range of biomolecules using matrix-assisted laser desorption/ionization IMS ranging from high-molecular-weight proteins to small metabolites, more often than not only the most abundant easily ionisable species are detected. To better understand complex diseases such as cancer more specific and sensitive methods need to be developed to enable the detection of lower abundance molecules but also molecules that have yet to be imaged by IMS. In recent years, a big shift has occurred in the imaging community from developing wide reaching methods to developing targeted ones which increases sensitivity through the use of more specific sample preparations. This has been primarily marked by the advent of solvent-free matrix deposition methods for polar lipids, chemical derivatization for hormones and metabolites, and the use of alternative ionization agents for neutral lipids. In this chapter, we discuss two of the latest sample preparations which exploit the use of alternative ionization agents to enable the detection of certain classes of neutral lipids along with free fatty acids by high-sensitivity IMS as demonstrated within our lab.
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Affiliation(s)
- M Dufresne
- Université de Montréal, Montreal, QC, Canada
| | - N H Patterson
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, United States
| | - N Lauzon
- Université de Montréal, Montreal, QC, Canada
| | - P Chaurand
- Université de Montréal, Montreal, QC, Canada.
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152
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Bacterial analysis by laser desorption ionization mass spectrometry on amorphous silicon. Biointerphases 2016; 11:041008. [PMID: 28006919 DOI: 10.1116/1.4972416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Lipid profiling in nine bacterial species has been accomplished by laser desorption ionization mass spectrometry (LDI-MS) using amorphous silicon (a-Si) thin film with 100 nm thickness. Lipid ions could be generated by LDI on a-Si regardless of ion acquisition modes because of a thermal property of a-Si to govern laser-induced surface heating. In a comparative study of lipid profiling in Bacillus lichemiformis by LDI-MS and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), LDI-MS on a-Si shows a higher efficiency in lipid and lipopeptide detection than MALDI-MS. A total of 53 peaks of lipid ions generated by LDI on a-Si in both acquisition modes for m/z 400-1200 was 1.6 times more than that detected by MALDI-MS using three organic matrices-2,5-dihydroxybenzoic acid, 1,5-diaminonaphthalene, and 2,4,6-trihydroxyacetophenone monohydrate. Also, the authors demonstrate by mass spectrometry imaging (MSI) that LDI-MS provides high detection coverage through whole sample area. MSI results show the detection yield in LDI on a-Si is 94.8% calculated by counting the number of points detected in the analyte ion signal in a whole spot. It means that reproducible detection of lipid ions by LDI-MS is possible even if laser is randomly irradiated at any position within the bacterial sample area applied on a-Si. Lipid profiling by LDI-MS on a-Si was applied to bacterial differentiation of nine bacterial species conducted by performing principal component analysis. Nine bacterial species are successfully distinguishable from each other by LDI-MS lipid profiling.
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153
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Dufresne M, Guneysu D, Patterson NH, Marcinkiewicz MM, Regina A, Demeule M, Chaurand P. Multimodal detection of GM2 and GM3 lipid species in the brain of mucopolysaccharidosis type II mouse by serial imaging mass spectrometry and immunohistochemistry. Anal Bioanal Chem 2016; 409:1425-1433. [DOI: 10.1007/s00216-016-0076-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/24/2016] [Accepted: 10/31/2016] [Indexed: 11/24/2022]
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154
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Assessment of pathological response to therapy using lipid mass spectrometry imaging. Sci Rep 2016; 6:36814. [PMID: 27841360 PMCID: PMC5107952 DOI: 10.1038/srep36814] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/19/2016] [Indexed: 02/06/2023] Open
Abstract
In many cancers, the establishment of a patient’s future treatment regime often relies on histopathological assessment of tumor tissue specimens in order to determine the extent of the ‘pathological response’ to a given therapy. However, histopathological assessment of pathological response remains subjective. Here we use MALDI mass spectrometry imaging to generate lipid signatures from colorectal cancer liver metastasis specimens resected from patients preoperatively treated with chemotherapy. Using these signatures we obtained a unique pathological response score that correlates with prognosis. In addition, we identify single lipid moieties that are overexpressed in different histopathological features of the tumor, which have potential as new biomarkers for assessing response to therapy. These data show that computational methods, focusing on the lipidome, can be used to determine prognostic markers for response to chemotherapy and may potentially improve risk assessment and patient care.
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155
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Mendis LHS, Grey AC, Faull RLM, Curtis MA. Hippocampal lipid differences in Alzheimer's disease: a human brain study using matrix-assisted laser desorption/ionization-imaging mass spectrometry. Brain Behav 2016; 6:e00517. [PMID: 27781133 PMCID: PMC5064331 DOI: 10.1002/brb3.517] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 05/18/2016] [Accepted: 05/21/2016] [Indexed: 11/11/2022] Open
Abstract
INTRODUCTION Alzheimer's disease (AD), the leading cause of dementia, is pathologically characterized by β-amyloid plaques and tau tangles. However, there is also evidence of lipid dyshomeostasis-mediated AD pathology. Given the structural diversity of lipids, mass spectrometry is a useful tool for studying lipid changes in AD. Although there have been a few studies investigating lipid changes in the human hippocampus in particular, there are few reports on how lipids change in each hippocampal subfield (e.g., Cornu Ammonis [CA] 1-4, dentate gyrus [DG] etc.). Since each subfield has its own function, we postulated that there could be lipid changes that are unique to each. METHODS We used matrix-assisted laser desorption/ionization-imaging mass spectrometry to investigate specific lipid changes in each subfield in AD. Data from the hippocampus region of six age- and gender-matched normal and AD pairs were analyzed with SCiLS lab 2015b software (SCiLS GmbH, Germany; RRID:SCR_014426), using an analysis workflow developed in-house. Hematoxylin, eosin, and luxol fast blue staining were used to precisely delineate each anatomical hippocampal subfield. Putative lipid identities, which were consistent with published data, were assigned using MS/MS. RESULTS Both positively and negatively charged lipid ion species were abundantly detected in normal and AD tissue. While the distribution pattern of lipids did not change in AD, the abundance of some lipids changed, consistent with trends that have been previously reported. However, our results indicated that the majority of these lipid changes specifically occur in the CA1 region. Additionally, there were many lipid changes that were specific to the DG. CONCLUSIONS Matrix-assisted laser desorption/ionization-imaging mass spectrometry and our analysis workflow provide a novel method to investigate specific lipid changes in hippocampal subfields. Future work will focus on elucidating the role that specific lipid differences in each subfield play in AD pathogenesis.
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Affiliation(s)
- Lakshini H. S. Mendis
- Centre for Brain ResearchFaculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
- Department of Anatomy and Medical Imaging Faculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
| | - Angus C. Grey
- Centre for Brain ResearchFaculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
- Department of PhysiologyFaculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
| | - Richard L. M. Faull
- Centre for Brain ResearchFaculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
- Department of Anatomy and Medical Imaging Faculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
| | - Maurice A. Curtis
- Centre for Brain ResearchFaculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
- Department of Anatomy and Medical Imaging Faculty of Medical and Health ScienceUniversity of AucklandAucklandNew Zealand
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156
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Baker TC, Han J, Borchers CH. Recent advancements in matrix-assisted laser desorption/ionization mass spectrometry imaging. Curr Opin Biotechnol 2016; 43:62-69. [PMID: 27690313 DOI: 10.1016/j.copbio.2016.09.003] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 09/06/2016] [Indexed: 10/20/2022]
Abstract
Matrix assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) is a robust tool for spatially resolved analysis of biomolecules in situ. Recent advances in high ionization-efficiency MALDI matrices, new matrix deposition procedures, and the development of high spatial-resolution and high sensitivity MS instruments continue to drive new applications of MALDI-MSI, along with other MSI techniques, which allow us to visualize and determine the regio-specific and temporal changes in proteins, peptides, lipids, drug molecules, and metabolites within the tissues, cells and microorganisms. These provide researchers with a new route to the discovery of potential biomarkers of human disease and elucidation of the underlying biology of metabolic regulation, thus bringing our understanding of human health to a new level.
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Affiliation(s)
- Teesha C Baker
- University of Victoria-Genome British Columbia Proteomics Centre, #3101-4464 Markham St., Vancouver Island Technology Park, Victoria, BC V8Z 7X8, Canada; Department of Biochemistry and Microbiology, University of Victoria, Petch Building Room 207, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada
| | - Jun Han
- University of Victoria-Genome British Columbia Proteomics Centre, #3101-4464 Markham St., Vancouver Island Technology Park, Victoria, BC V8Z 7X8, Canada
| | - Christoph H Borchers
- University of Victoria-Genome British Columbia Proteomics Centre, #3101-4464 Markham St., Vancouver Island Technology Park, Victoria, BC V8Z 7X8, Canada; Department of Biochemistry and Microbiology, University of Victoria, Petch Building Room 207, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada.
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157
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Bestard-Escalas J, Garate J, Maimó-Barceló A, Fernández R, Lopez DH, Lage S, Reigada R, Khorrami S, Ginard D, Reyes J, Amengual I, Fernández JA, Barceló-Coblijn G. Lipid fingerprint image accurately conveys human colon cell pathophysiologic state: A solid candidate as biomarker. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1942-1950. [PMID: 27663183 DOI: 10.1016/j.bbalip.2016.09.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 08/19/2016] [Accepted: 09/16/2016] [Indexed: 12/25/2022]
Abstract
Membrane lipids are gaining increasing attention in the clinical biomarker field, as they are associated with different pathologic processes such as cancer or neurodegenerative diseases. Analyzing human colonoscopic sections by matrix assisted laser/desorption ionization (MALDI) mass spectrometry imaging techniques, we identified a defined number of lipid species changing concomitant to the colonocyte differentiation and according to a quite simple mathematical expression. These species felt into two lipid families tightly associated in signaling: phosphatidylinositols and arachidonic acid-containing lipids. On the other hand, an opposed pattern was observed in lamina propria for AA-containing lipids, coinciding with the physiological distribution of the immunological response cells in this tissue. Importantly, the lipid gradient was accompanied by a gradient in expression of enzymes involved in lipid mobilization. Finally, both lipid and protein gradients were lost in adenomatous polyps. The latter allowed us to assess how different a single lipid species is handled in a pathological context depending on the cell type. The strict patterns of distribution in lipid species and lipid enzymes described here unveil the existence of fine regulatory mechanisms orchestrating the lipidome according to the physiological state of the cell. In addition, these results provide solid evidence that the cell lipid fingerprint image can be used to predict precisely the physiological and pathological status of a cell, reinforcing its translational impact in clinical research.
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Affiliation(s)
- Joan Bestard-Escalas
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain.
| | - Jone Garate
- Dep. of Physical Chemistry, University of the Basque Country (UPV/EHU), Leioa, Biscay, Spain.
| | - Albert Maimó-Barceló
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain.
| | - Roberto Fernández
- Dep. of Physical Chemistry, University of the Basque Country (UPV/EHU), Leioa, Biscay, Spain.
| | - Daniel Horacio Lopez
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain.
| | - Sergio Lage
- Dep. of Physical Chemistry, University of the Basque Country (UPV/EHU), Leioa, Biscay, Spain.
| | - Rebeca Reigada
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain.
| | - Sam Khorrami
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain; Gastroenterology Unit, Hospital Universitari Son Espases, Palma, Balearic Islands, Spain.
| | - Daniel Ginard
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain; Gastroenterology Unit, Hospital Universitari Son Espases, Palma, Balearic Islands, Spain.
| | - José Reyes
- Gastroenterology Unit, Hospital Comarcal de Inca, Inca, Balearic Islands, Spain.
| | - Isabel Amengual
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain; Pathological Anatomy Unit, Hospital Universitari Son Espases, Palma, Balearic Islands, Spain.
| | - José A Fernández
- Dep. of Physical Chemistry, University of the Basque Country (UPV/EHU), Leioa, Biscay, Spain.
| | - Gwendolyn Barceló-Coblijn
- Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa, Medical Research Institute of Palma), Palma, Balearic Islands, Spain.
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158
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Yagnik GB, Hansen RL, Korte AR, Reichert MD, Vela J, Lee YJ. Large Scale Nanoparticle Screening for Small Molecule Analysis in Laser Desorption Ionization Mass Spectrometry. Anal Chem 2016; 88:8926-30. [DOI: 10.1021/acs.analchem.6b02732] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Gargey B. Yagnik
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory-U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Rebecca L. Hansen
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory-U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Andrew R. Korte
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory-U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Malinda D. Reichert
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Javier Vela
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory-U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Young Jin Lee
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory-U.S. Department of Energy, Ames, Iowa 50011, United States
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159
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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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160
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Murray KK, Seneviratne CA, Ghorai S. High resolution laser mass spectrometry bioimaging. Methods 2016; 104:118-26. [PMID: 26972785 PMCID: PMC4937799 DOI: 10.1016/j.ymeth.2016.03.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 02/23/2016] [Accepted: 03/08/2016] [Indexed: 12/11/2022] Open
Abstract
Mass spectrometry imaging (MSI) was introduced more than five decades ago with secondary ion mass spectrometry (SIMS) and a decade later with laser desorption/ionization (LDI) mass spectrometry (MS). Large biomolecule imaging by matrix-assisted laser desorption/ionization (MALDI) was developed in the 1990s and ambient laser MS a decade ago. Although SIMS has been capable of imaging with a moderate mass range at sub-micrometer lateral resolution from its inception, laser MS requires additional effort to achieve a lateral resolution of 10μm or below which is required to image at the size scale of single mammalian cells. This review covers untargeted large biomolecule MSI using lasers for desorption/ionization or laser desorption and post-ionization. These methods include laser microprobe (LDI) MSI, MALDI MSI, laser ambient and atmospheric pressure MSI, and near-field laser ablation MS. Novel approaches to improving lateral resolution are discussed, including oversampling, beam shaping, transmission geometry, reflective and through-hole objectives, microscope mode, and near-field optics.
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Affiliation(s)
- Kermit K Murray
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.
| | | | - Suman Ghorai
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
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161
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Ly A, Buck A, Balluff B, Sun N, Gorzolka K, Feuchtinger A, Janssen KP, Kuppen PJK, van de Velde CJH, Weirich G, Erlmeier F, Langer R, Aubele M, Zitzelsberger H, McDonnell L, Aichler M, Walch A. High-mass-resolution MALDI mass spectrometry imaging of metabolites from formalin-fixed paraffin-embedded tissue. Nat Protoc 2016; 11:1428-43. [PMID: 27414759 DOI: 10.1038/nprot.2016.081] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Formalin-fixed and paraffin-embedded (FFPE) tissue specimens are the gold standard for histological examination, and they provide valuable molecular information in tissue-based research. Metabolite assessment from archived tissue samples has not been extensively conducted because of a lack of appropriate protocols and concerns about changes in metabolite content or chemical state due to tissue processing. We present a protocol for the in situ analysis of metabolite content from FFPE samples using a high-mass-resolution matrix-assisted laser desorption/ionization fourier-transform ion cyclotron resonance mass spectrometry imaging (MALDI-FT-ICR-MSI) platform. The method involves FFPE tissue sections that undergo deparaffinization and matrix coating by 9-aminoacridine before MALDI-MSI. Using this platform, we previously detected ∼1,500 m/z species in the mass range m/z 50-1,000 in FFPE samples; the overlap compared with fresh frozen samples is 72% of m/z species, indicating that metabolites are largely conserved in FFPE tissue samples. This protocol can be reproducibly performed on FFPE tissues, including small samples such as tissue microarrays and biopsies. The procedure can be completed in a day, depending on the size of the sample measured and raster size used. Advantages of this approach include easy sample handling, reproducibility, high throughput and the ability to demonstrate molecular spatial distributions in situ. The data acquired with this protocol can be used in research and clinical practice.
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Affiliation(s)
- Alice Ly
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Achim Buck
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Benjamin Balluff
- Maastricht MultiModal Molecular Imaging Institute (M4I), Maastricht University, Maastricht, the Netherlands
| | - Na Sun
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Karin Gorzolka
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Klaus-Peter Janssen
- Department of Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Peter J K Kuppen
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Gregor Weirich
- Institute of Pathology, Technische Universität München, Munich, Germany
| | | | - Rupert Langer
- Institute of Pathology, Technische Universität München, Munich, Germany
| | - Michaela Aubele
- Institute of Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Horst Zitzelsberger
- Research Unit Radiation Cytogenetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Liam McDonnell
- Centre for Proteomics and Metabolomics, Leiden University Medical Centre, Leiden, the Netherlands.,Fondazione Pisana per la Scienza ONLUS, Pisa, Italy
| | - Michaela Aichler
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Axel Walch
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
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162
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Fernández R, Carriel V, Lage S, Garate J, Díez-García J, Ochoa B, Castro B, Alaminos M, Fernández JA. Deciphering the Lipid Architecture of the Rat Sciatic Nerve Using Imaging Mass Spectrometry. ACS Chem Neurosci 2016; 7:624-32. [PMID: 27043994 DOI: 10.1021/acschemneuro.6b00010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Knowledge on the normal structure and molecular composition of the peripheral nerves is essential to understand their pathophysiology and to select the regeneration strategies after injury. However, the precise lipid composition of the normal peripheral nerve is still poorly known. Here, we present the first study of distribution of individual lipids in the mature sciatic nerve of rats by imaging mass spectrometry. Both positive and negative ion modes were used to detect, identify and in situ map 166 molecular species of mainly glycerophospholipids, sphingomyelins, sulfatides, and diacyl and triacylglycerols. In parallel, lipid extracts were analyzed by LC-MS/MS to verify and complement the identification of lipids directly from the whole tissue. Three anatomical regions were clearly identified by its differential lipid composition: the nerve fibers, the connective tissue and the adipose tissue that surrounds the nerve. Unexpectedly, very little variety of phosphatidylcholine (PC) species was found, being by far PC 34:1 the most abundant species. Also, a rich composition on sulfatides was detected in fibers, probably due to the important role they play in the myelin cover around axons, as well as an abundance of storage lipids in the adipose and connective tissues. The database of lipids here presented for each region and for the whole sciatic nerve is a first step toward understanding the variety of the peripheral nerves' lipidome and its changes associated with different diseases and mechanical injuries.
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Affiliation(s)
| | - Víctor Carriel
- Tissue
Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, 18012 Granada, Spain
| | | | | | | | | | - Begoña Castro
- Histocell, S.L., Bizkaia Technology Park 800, 48160 Derio, Spain
| | - Miguel Alaminos
- Tissue
Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, 18012 Granada, Spain
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163
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Dufresne M, Masson JF, Chaurand P. Sodium-Doped Gold-Assisted Laser Desorption Ionization for Enhanced Imaging Mass Spectrometry of Triacylglycerols from Thin Tissue Sections. Anal Chem 2016; 88:6018-25. [PMID: 27145160 DOI: 10.1021/acs.analchem.6b01141] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The deposition of sodium salts followed by a sputtered layer of gold has been demonstrated to be a power combination for the analysis of triacylglycerols (TAGs) from tissue sections by laser desorption ionization (LDI) imaging mass spectrometry (IMS). Various sodium salts were tested for their capability to ionize TAGs and their ability to produce fast drying, small crystals (≤3 μm). The spray deposition of a sodium acetate and carbonate buffer mixture at pH 10.3 on which a 28 ± 3 nm sputtered layer of gold (Au-CBS) is subsequently deposited was found to provide the most effective combination for TAG analysis by high imaging resolution IMS. Under these conditions, a 30-fold increase in TAG signal intensity was observed when compared to matrix-assisted LDI (MALDI) methods using 2,5-dihydrobenzoic acid as matrix. Furthermore, Au-CBS led to an increase in the number of detected TAG species from ∼7 with DHB to more than 25 with the novel method, while few phospholipid signals were observed. These results were derived from the IMS investigation of fresh frozen mouse liver and rabbit adrenal gland tissue sections with a range of higher spatial resolutions between 35 and 10 μm. Au-CBS-LDI MS presents a highly sensitive and specific alternative to MALDI MS for imaging of TAGs from tissue sections. This novel approach has the potential to provide new biological insights on the role of TAGs in both health and disease.
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Affiliation(s)
- Martin Dufresne
- Department of Chemistry, University of Montreal , Montreal, Quebec H3C 3J7, Canada
| | - Jean-François Masson
- Department of Chemistry, University of Montreal , Montreal, Quebec H3C 3J7, Canada.,Centre for Self-Assembled Chemical Structures (CSACS), McGill University , Montreal, Quebec H3A 2K6, Canada
| | - Pierre Chaurand
- Department of Chemistry, University of Montreal , Montreal, Quebec H3C 3J7, Canada
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164
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Spraggins JM, Rizzo DG, Moore JL, Noto MJ, Skaar EP, Caprioli RM. Next-generation technologies for spatial proteomics: Integrating ultra-high speed MALDI-TOF and high mass resolution MALDI FTICR imaging mass spectrometry for protein analysis. Proteomics 2016; 16:1678-89. [PMID: 27060368 DOI: 10.1002/pmic.201600003] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 03/02/2016] [Accepted: 03/31/2016] [Indexed: 12/23/2022]
Abstract
MALDI imaging mass spectrometry is a powerful analytical tool enabling the visualization of biomolecules in tissue. However, there are unique challenges associated with protein imaging experiments including the need for higher spatial resolution capabilities, improved image acquisition rates, and better molecular specificity. Here we demonstrate the capabilities of ultra-high speed MALDI-TOF and high mass resolution MALDI FTICR IMS platforms as they relate to these challenges. High spatial resolution MALDI-TOF protein images of rat brain tissue and cystic fibrosis lung tissue were acquired at image acquisition rates >25 pixels/s. Structures as small as 50 μm were spatially resolved and proteins associated with host immune response were observed in cystic fibrosis lung tissue. Ultra-high speed MALDI-TOF enables unique applications including megapixel molecular imaging as demonstrated for lipid analysis of cystic fibrosis lung tissue. Additionally, imaging experiments using MALDI FTICR IMS were shown to produce data with high mass accuracy (<5 ppm) and resolving power (∼75 000 at m/z 5000) for proteins up to ∼20 kDa. Analysis of clear cell renal cell carcinoma using MALDI FTICR IMS identified specific proteins localized to healthy tissue regions, within the tumor, and also in areas of increased vascularization around the tumor.
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Affiliation(s)
- Jeffrey M Spraggins
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA.,Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Chemistry, Vanderbilt University, Nashville, TN, USA
| | - David G Rizzo
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Chemistry, Vanderbilt University, Nashville, TN, USA
| | - Jessica L Moore
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Chemistry, Vanderbilt University, Nashville, TN, USA
| | - Michael J Noto
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Eric P Skaar
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA.,United States (U.S.) Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA
| | - Richard M Caprioli
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA.,Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Chemistry, Vanderbilt University, Nashville, TN, USA.,Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.,Departments of Pharmacology and Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
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165
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Xie T, Zhou X, Wang S, Lu Y, Zhu H, Kang A, Deng H, Xu J, Shen C, Di L, Shan J. Development and application of a comprehensive lipidomic analysis to investigate Tripterygium wilfordii-induced liver injury. Anal Bioanal Chem 2016; 408:4341-55. [PMID: 27086014 DOI: 10.1007/s00216-016-9533-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 03/17/2016] [Accepted: 03/30/2016] [Indexed: 12/16/2022]
Abstract
Lipid metabolic pathways play pivotal roles in liver function, and disturbances of these pathways are associated with various diseases. Thus, comprehensive characterization and measurement of lipid metabolites are essential to deciphering the contributions of lipid network metabolism to diseases or its responses to drug intervention. Here, we report an integrated lipidomic analysis for the comprehensive detection of lipid metabolites. To facilitate the characterization of untargeted lipids through fragmentation analysis, nine formulas were proposed to identify the fatty acid composition of lipids from complex MS (n) spectrum information. By these formulas, the co-eluted isomeric compounds could be distinguished. In total, 250 lipids were detected and characterized, including diacylglycerols, triacylglycerols, glycerophosphoethanolamines, glycerophosphocholines, glycerophosphoserines, glycerophosphoglycerols, glycerophosphoinositols, cardiolipins, ceramides, and sphingomyelins. Integrated with the targeted lipidomics, a total of 27 inflammatory oxylipins were also measured. To evaluate the aberrant lipid metabolism involved in liver injury induced by Tripterygium wilfordii, lipid network metabolism was further investigated. Results indicated that energy lipid modification, membrane remodeling, potential signaling lipid alterations, and abnormal inflammation response were associated with injury. Because of the important roles of lipids in liver metabolism, this new method is expected to be useful in analyzing other lipid metabolism diseases.
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Affiliation(s)
- Tong Xie
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China.
| | - Xueping Zhou
- The First Clinical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Shouchuan Wang
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Yan Lu
- The First Clinical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Huaxu Zhu
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, College of Pharmacy, Nanjing University of Chinese Medicine, No. 138 Xianlin Avenue, Nanjing, Jiangsu, 210023, China
| | - An Kang
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, College of Pharmacy, Nanjing University of Chinese Medicine, No. 138 Xianlin Avenue, Nanjing, Jiangsu, 210023, China
| | - Haishan Deng
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, College of Pharmacy, Nanjing University of Chinese Medicine, No. 138 Xianlin Avenue, Nanjing, Jiangsu, 210023, China
| | - Jianya Xu
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Cunsi Shen
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Liuqing Di
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, College of Pharmacy, Nanjing University of Chinese Medicine, No. 138 Xianlin Avenue, Nanjing, Jiangsu, 210023, China
| | - Jinjun Shan
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China.
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166
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Huang L, Tang X, Zhang W, Jiang R, Chen D, Zhang J, Zhong H. Imaging of Endogenous Metabolites of Plant Leaves by Mass Spectrometry Based on Laser Activated Electron Tunneling. Sci Rep 2016; 6:24164. [PMID: 27053227 PMCID: PMC4823709 DOI: 10.1038/srep24164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 03/22/2016] [Indexed: 02/06/2023] Open
Abstract
A new mass spectrometric imaging approach based on laser activated electron tunneling (LAET) was described and applied to analysis of endogenous metabolites of plant leaves. LAET is an electron-directed soft ionization technique. Compressed thin films of semiconductor nanoparticles of bismuth cobalt zinc oxide were placed on the sample plate for proof-of-principle demonstration because they can not only absorb ultraviolet laser but also have high electron mobility. Upon laser irradiation, electrons are excited from valence bands to conduction bands. With appropriate kinetic energies, photoexcited electrons can tunnel away from the barrier and eventually be captured by charge deficient atoms present in neutral molecules. Resultant unpaired electron subsequently initiates specific chemical bond cleavage and generates ions that can be detected in negative ion mode of the mass spectrometer. LAET avoids the co-crystallization process of routinely used organic matrix materials with analyzes in MALDI (matrix assisted-laser desorption ionization) analysis. Thus uneven distribution of crystals with different sizes and shapes as well as background peaks in the low mass range resulting from matrix molecules is eliminated. Advantages of LAET imaging technique include not only improved spatial resolution but also photoelectron capture dissociation which produces predictable fragment ions.
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Affiliation(s)
- Lulu Huang
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Xuemei Tang
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Wenyang Zhang
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Ruowei Jiang
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Disong Chen
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Juan Zhang
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Hongying Zhong
- Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
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167
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Abstract
Plant-omics is rapidly becoming an important field of study in the scientific community due to the urgent need to address many of the most important questions facing humanity today with regard to agriculture, medicine, biofuels, environmental decontamination, ecological sustainability, etc. High-performance mass spectrometry is a dominant tool for interrogating the metabolomes, peptidomes, and proteomes of a diversity of plant species under various conditions, revealing key insights into the functions and mechanisms of plant biochemistry.
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Affiliation(s)
- Erin Gemperline
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Caitlin Keller
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Lingjun Li
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.,School of Pharmacy, University of Wisconsin-Madison , 777 Highland Avenue, Madison, Wisconsin 53705, United States
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168
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Shi F, Flanigan PM, Archer JJ, Levis RJ. Ambient Molecular Analysis of Biological Tissue Using Low-Energy, Femtosecond Laser Vaporization and Nanospray Postionization Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:542-551. [PMID: 26667178 DOI: 10.1007/s13361-015-1302-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/22/2015] [Accepted: 10/27/2015] [Indexed: 06/05/2023]
Abstract
Direct analysis of plant and animal tissue samples by laser electrospray mass spectrometry (LEMS) was investigated using low-energy, femtosecond duration laser vaporization at wavelengths of 800 and 1042 nm followed by nanospray postionization. Low-energy (<50 μJ), fiber-based 1042 nm LEMS (F-LEMS) allowed interrogation of the molecular species in fresh flower petal and leaf samples using 435 fs, 10 Hz bursts of 20 pulses from a Ytterbium-doped fiber laser and revealed comparable results to high energy (75-1120 μJ), 45 fs, 800 nm Ti:Sapphire-based LEMS (Ti:Sapphire-LEMS) measurements. Anthocyanins, sugars, and other metabolites were successfully detected and revealed the anticipated metabolite profile for the petal and leaf samples. Phospholipids, especially phosphatidylcholine, were identified from a fresh mouse brain section sample using Ti:Sapphire-LEMS without the application of matrix. These lipid features were suppressed in both the fiber-based and Ti:Sapphire-based LEMS measurements when the brain sample was prepared using the optimal cutting temperature compounds that are commonly used in animal tissue cryosections.
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Affiliation(s)
- Fengjian Shi
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
- Center for Advanced Photonics Research, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
| | - Paul M Flanigan
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
- Center for Advanced Photonics Research, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
- Signature Science, LLC., 2819 Fire Rd, Egg Harbor Township, NJ, 08234, USA
| | - Jieutonne J Archer
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
- Center for Advanced Photonics Research, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
| | - Robert J Levis
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA.
- Center for Advanced Photonics Research, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA.
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169
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Mascini NE, Cheng M, Jiang L, Rizwan A, Podmore H, Bhandari DR, Römpp A, Glunde K, Heeren RMA. Mass Spectrometry Imaging of the Hypoxia Marker Pimonidazole in a Breast Tumor Model. Anal Chem 2016; 88:3107-14. [PMID: 26891127 DOI: 10.1021/acs.analchem.5b04032] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Although tumor hypoxia is associated with tumor aggressiveness and resistance to cancer treatment, many details of hypoxia-induced changes in tumors remain to be elucidated. Mass spectrometry imaging (MSI) is a technique that is well suited to study the biomolecular composition of specific tissue regions, such as hypoxic tumor regions. Here, we investigate the use of pimonidazole as an exogenous hypoxia marker for matrix-assisted laser desorption/ionization (MALDI) MSI. In hypoxic cells, pimonidazole is reduced and forms reactive products that bind to thiol groups in proteins, peptides, and amino acids. We show that a reductively activated pimonidazole metabolite can be imaged by MALDI-MSI in a breast tumor xenograft model. Immunohistochemical detection of pimonidazole adducts on adjacent tissue sections confirmed that this metabolite is localized to hypoxic tissue regions. We used this metabolite to image hypoxic tissue regions and their associated lipid and small molecule distributions with MALDI-MSI. We identified a heterogeneous distribution of 1-methylnicotinamide and acetylcarnitine, which mostly colocalized with hypoxic tumor regions. As pimonidazole is a widely used immunohistochemical marker of tissue hypoxia, it is likely that the presented direct MALDI-MSI approach is also applicable to other tissues from pimonidazole-injected animals or humans.
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Affiliation(s)
| | - Menglin Cheng
- The Johns Hopkins University In Vivo Cellular and Molecular Imaging Center, Division of Cancer Imaging Research, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland 21205, United States
| | - Lu Jiang
- The Johns Hopkins University In Vivo Cellular and Molecular Imaging Center, Division of Cancer Imaging Research, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland 21205, United States
| | - Asif Rizwan
- The Johns Hopkins University In Vivo Cellular and Molecular Imaging Center, Division of Cancer Imaging Research, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland 21205, United States
| | - Helen Podmore
- Thermo Fisher Scientific , Stafford House, 1 Boundary Park, Hemel Hempstead HP2 7GE, Herts, United Kingdom
| | - Dhaka R Bhandari
- TransMIT GmbH · TransMIT Center for Mass Spectrometric Developments , Schubertstrasse 60, 35392 Giessen, Germany
| | - Andreas Römpp
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen , Schubertstrasse 60, 35392 Giessen, Germany
| | - Kristine Glunde
- The Johns Hopkins University In Vivo Cellular and Molecular Imaging Center, Division of Cancer Imaging Research, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland 21205, United States.,Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine , Baltimore, Maryland 21231, United States
| | - Ron M A Heeren
- FOM Institute AMOLF , 1098 XG Amsterdam, The Netherlands.,The Maastricht Multimodal Molecular Imaging institute (M4I) , 6229 ER Maastricht, The Netherlands
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170
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Dong Y, Li B, Malitsky S, Rogachev I, Aharoni A, Kaftan F, Svatoš A, Franceschi P. Sample Preparation for Mass Spectrometry Imaging of Plant Tissues: A Review. FRONTIERS IN PLANT SCIENCE 2016; 7:60. [PMID: 26904042 PMCID: PMC4748743 DOI: 10.3389/fpls.2016.00060] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 01/14/2016] [Indexed: 05/18/2023]
Abstract
Mass spectrometry imaging (MSI) is a mass spectrometry based molecular ion imaging technique. It provides the means for ascertaining the spatial distribution of a large variety of analytes directly on tissue sample surfaces without any labeling or staining agents. These advantages make it an attractive molecular histology tool in medical, pharmaceutical, and biological research. Likewise, MSI has started gaining popularity in plant sciences; yet, information regarding sample preparation methods for plant tissues is still limited. Sample preparation is a crucial step that is directly associated with the quality and authenticity of the imaging results, it therefore demands in-depth studies based on the characteristics of plant samples. In this review, a sample preparation pipeline is discussed in detail and illustrated through selected practical examples. In particular, special concerns regarding sample preparation for plant imaging are critically evaluated. Finally, the applications of MSI techniques in plants are reviewed according to different classes of plant metabolites.
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Affiliation(s)
- Yonghui Dong
- Biostatistics and Data Management, Research and Innovation Centre - Fondazione Edmund MachS. Michele all'Adige, Italy
- Department of Plant and Environmental Sciences, Weizmann Institute of ScienceRehovot, Israel
| | - Bin Li
- Department of Chemistry and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-ChampaignUrbana, IL, USA
| | - Sergey Malitsky
- Department of Plant and Environmental Sciences, Weizmann Institute of ScienceRehovot, Israel
| | - Ilana Rogachev
- Department of Plant and Environmental Sciences, Weizmann Institute of ScienceRehovot, Israel
| | - Asaph Aharoni
- Department of Plant and Environmental Sciences, Weizmann Institute of ScienceRehovot, Israel
| | - Filip Kaftan
- Research Group Mass Spectrometry/Proteomics, Max Planck Institute for Chemical EcologyJena, Germany
| | - Aleš Svatoš
- Research Group Mass Spectrometry/Proteomics, Max Planck Institute for Chemical EcologyJena, Germany
| | - Pietro Franceschi
- Biostatistics and Data Management, Research and Innovation Centre - Fondazione Edmund MachS. Michele all'Adige, Italy
- *Correspondence: Pietro Franceschi
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171
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Ellis SR, Cappell J, Potočnik NO, Balluff B, Hamaide J, Van der Linden A, Heeren RMA. More from less: high-throughput dual polarity lipid imaging of biological tissues. Analyst 2016; 141:3832-41. [DOI: 10.1039/c6an00169f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Here, we reveal the increased biochemical and spatial information acquired using high-speed MALDI-MSI and sequential acquisitions of positive and negative lipid-MSI data from single tissue sections.
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Affiliation(s)
- Shane R. Ellis
- M4I
- The Maastricht Multimodal Molecular Imaging Institute
- 6229 ER Maastricht
- The Netherlands
| | - Joanna Cappell
- M4I
- The Maastricht Multimodal Molecular Imaging Institute
- 6229 ER Maastricht
- The Netherlands
| | - Nina Ogrinc Potočnik
- M4I
- The Maastricht Multimodal Molecular Imaging Institute
- 6229 ER Maastricht
- The Netherlands
| | - Benjamin Balluff
- M4I
- The Maastricht Multimodal Molecular Imaging Institute
- 6229 ER Maastricht
- The Netherlands
| | - Julie Hamaide
- Bio-Imaging Lab
- University of Antwerp
- 2610 Wilrijk
- Belgium
| | | | - Ron M. A. Heeren
- M4I
- The Maastricht Multimodal Molecular Imaging Institute
- 6229 ER Maastricht
- The Netherlands
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172
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Weißflog J, Svatoš A. 1,8-Di(piperidinyl)-naphthalene – rationally designed MAILD/MALDI matrix for metabolomics and imaging mass spectrometry. RSC Adv 2016. [DOI: 10.1039/c6ra17237g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) of small molecules requires special matrices, which do not generate interfering signals below m/z 500.
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Affiliation(s)
- Jerrit Weißflog
- Mass Spectrometry/Proteomics Research Group Max Planck Institute for Chemical Ecology
- 07745 Jena
- Germany
| | - Aleš Svatoš
- Mass Spectrometry/Proteomics Research Group Max Planck Institute for Chemical Ecology
- 07745 Jena
- Germany
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173
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Giampà M, Lissel MB, Patschkowski T, Fuchser J, Hans VH, Gembruch O, Bednarz H, Niehaus K. Maleic anhydride proton sponge as a novel MALDI matrix for the visualization of small molecules (<250 m/z) in brain tumors by routine MALDI ToF imaging mass spectrometry. Chem Commun (Camb) 2016; 52:9801-4. [DOI: 10.1039/c6cc02387h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel MALDI matrix MAPS, able to visualize deviating metabolism in glioma using a routine MALDI-ToF-MSI procedure, is presented.
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Affiliation(s)
- M. Giampà
- Center for Biotechnology and Department for Proteome and Metabolome Research
- Faculty of Biology
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - M. B. Lissel
- Center for Biotechnology and Department for Proteome and Metabolome Research
- Faculty of Biology
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - T. Patschkowski
- Center for Biotechnology and Department for Proteome and Metabolome Research
- Faculty of Biology
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - J. Fuchser
- Bruker Daltonics GmbH
- BU Pharma
- 28259 Bremen
- Germany
| | - V. H. Hans
- Institut für Pathologie Ruhr-Universität Bochum
- 44789 Bochum
- Germany
- Institut für Neuropathologie
- Universitätsklinikum Essen (AöR)
| | - O. Gembruch
- Klinik für Neurochirurgie
- Universitätsklinikum Essen (AöR)
- 45147 Essen
- Germany
| | - H. Bednarz
- Center for Biotechnology and Department for Proteome and Metabolome Research
- Faculty of Biology
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - K. Niehaus
- Center for Biotechnology and Department for Proteome and Metabolome Research
- Faculty of Biology
- Bielefeld University
- 33615 Bielefeld
- Germany
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174
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Chagovets V, Lísa M, Holčapek M. Effects of fatty acyl chain length, double-bond number and matrix on phosphatidylcholine responses in matrix-assisted laser desorption/ionization on an Orbitrap mass spectrometer. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:2374-2384. [PMID: 26563708 DOI: 10.1002/rcm.7404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 09/19/2015] [Accepted: 09/20/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is used for the fast qualitative and quantitative analysis of phosphatidylcholines (PC). Fatty acyl chain lengths and the number of double bonds (DB) affect relative responses of PC; hence the determination of correction factors of individual PC is important for the accurate quantitation. The signal intensity in MALDI-MS strongly depends on the matrix; therefore, the following matrices typically used in lipidomics are studied in the present work: 2,5-dihydroxybenzoic acid (DHB), 1,5-diaminonaphthalene (DAN) and 9-aminoacridine (9AA). METHODS Series of PC with various fatty acyl chain lengths are synthesized for this study. PC concentrations over two orders of magnitude are studied with MALDI-MS. These experiments provide sets of calibration curves for each of the synthesized PC and the further analysis of parameters of calibration curves is performed. RESULTS Correction factors for PC decrease with increasing fatty acyl chain length for all matrices. These dependences are steeper for unsaturated PC than for saturated ones. MALDI matrices also have a significant effect on this dependence. The weakest dependence on fatty acyl chain length is found for saturated PC in 9AA. In the case of the other matrices, the effect of fatty acyl chain length on the response is essential for both saturated and unsaturated PC. Calibration curves and parameters of calibration curves for both saturated and monounsaturated PC are fitted by a linear function with regression coefficients decreasing in the order 9AA > DAN > DHB. CONCLUSIONS Differences in relative responses for PC in MALDI-MS measurements must be taken into account for accurate quantitation. Parameters of calibration curves can be used for the determination of PC concentrations using a single internal standard (IS). This method gives good results for the 9AA matrix, but the reproducibility of measurements for the DHB and DAN matrices is lower and the method can be used for a rough estimation only. These matrices are less convenient for the quantitation of PC.
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Affiliation(s)
- Vitaliy Chagovets
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Miroslav Lísa
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Michal Holčapek
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
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175
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Ogrinc Potočnik N, Porta T, Becker M, Heeren RMA, Ellis SR. Use of advantageous, volatile matrices enabled by next-generation high-speed matrix-assisted laser desorption/ionization time-of-flight imaging employing a scanning laser beam. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:2195-203. [PMID: 26522310 DOI: 10.1002/rcm.7379] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 08/28/2015] [Accepted: 08/29/2015] [Indexed: 05/03/2023]
Abstract
RATIONALE In mass spectrometry imaging (MSI) it is often desirable to analyse the same sample in both polarities to extract the most information. However, many matrices that produce high-quality spectra in matrix-assisted laser desorption/ionization (MALDI) are volatile, greatly limiting their use in long imaging experiments. We demonstrate that using a new high speed MALDI-MSI instrument, volatile matrices, including those that produce intense lipid signals in both positive and negative ion mode, can now be effectively used in MSI. METHODS A prototype Bruker rapifleX MALDI Tissuetyper™ time-of-flight (TOF) instrument was used for high-speed imaging. This allows acquisition rates up to 50 pixels/s made possible by use of a 10 kHz laser and two rotating mirrors that allow the laser beam to be moved over, and synchronised with, the rapidly moving sample. MSI experiments were performed on mouse brain sections using non-vacuum stable dithranol and 2,6-dihydroxyacetophenone (DHA) matrices with pixel sizes ranging from 10 × 10 µm(2) to 50 × 50 µm(2). RESULTS Both DHA and dithranol produced rich, complementary lipid spectra in both positive and negative ion modes. Due to the rapid acquisition speed of the instrument, both matrices could be effectively used for MSI despite their volatility. For example, an entire mouse brain could be imaged consecutively in both positive and negative ion mode with 50 × 50 µm(2) pixels in ~35 min. We demonstrate that these speeds make possible both faster and higher resolution imaging of biological tissues on practical timescales. CONCLUSIONS These high acquisition speeds now make possible whole new classes of matrices that are unstable under high vacuum for MALDI-MSI studies. This provides researchers with far greater range and flexibility in choosing the best matrix for the given sample and analytes that they wish to detect. In addition, such instruments allow MSI to be performed at higher resolution across larger areas on practical time scales.
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Affiliation(s)
- Nina Ogrinc Potočnik
- M4I, The Maastricht Multimodal Molecular Imaging Institute, 6229 ER Maastricht, The Netherlands
| | - Tiffany Porta
- M4I, The Maastricht Multimodal Molecular Imaging Institute, 6229 ER Maastricht, The Netherlands
| | - Michael Becker
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, 28359, Bremen, Germany
| | - Ron M A Heeren
- M4I, The Maastricht Multimodal Molecular Imaging Institute, 6229 ER Maastricht, The Netherlands
| | - Shane R Ellis
- M4I, The Maastricht Multimodal Molecular Imaging Institute, 6229 ER Maastricht, The Netherlands
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176
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Körsgen M, Pelster A, Vens-Cappell S, Roling O, Arlinghaus HF. Molecular ME-ToF-SIMS yield as a function of DHB matrix layer thicknesses obtained from brain sections coated by sublimation/deposition techniques. SURF INTERFACE ANAL 2015. [DOI: 10.1002/sia.5885] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Martin Körsgen
- Physikalisches Institut; Wilhelm Klemm Str. 10 Münster 48149 Germany
| | - Andreas Pelster
- Physikalisches Institut; Wilhelm Klemm Str. 10 Münster 48149 Germany
| | - Simeon Vens-Cappell
- Institute for Hygiene; University of Münster; Robert-Koch-Str. 41 Münster 48149 Germany
- Interdisciplinary Center for Clinical Research (IZKF); University of Münster; Domagkstr. 3 Münster 48149 Germany
| | - Oliver Roling
- Organic Chemistry Institute, Center for Soft Nanoscience and Graduate School of Chemistry; University of Münster; Corrensstr. 40 Münster 48149 Germany
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177
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Sugiyama E, Masaki N, Matsushita S, Setou M. Ammonium Sulfate Improves Detection of Hydrophilic Quaternary Ammonium Compounds through Decreased Ion Suppression in Matrix-Assisted Laser Desorption/Ionization Imaging Mass Spectrometry. Anal Chem 2015; 87:11176-81. [DOI: 10.1021/acs.analchem.5b02672] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Eiji Sugiyama
- Department
of Cell Biology
and Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku Hamamatsu, Shizuoka, 431-3192, Japan
| | - Noritaka Masaki
- Department
of Cell Biology
and Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku Hamamatsu, Shizuoka, 431-3192, Japan
| | - Shoko Matsushita
- Department
of Cell Biology
and Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku Hamamatsu, Shizuoka, 431-3192, Japan
| | - Mitsutoshi Setou
- Department
of Cell Biology
and Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku Hamamatsu, Shizuoka, 431-3192, Japan
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178
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Direct profiling of the phospholipid composition of adult Caenorhabditis elegans using whole-body imaging mass spectrometry. Anal Bioanal Chem 2015; 407:7589-602. [PMID: 26310845 PMCID: PMC4575384 DOI: 10.1007/s00216-015-8932-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 07/08/2015] [Accepted: 07/20/2015] [Indexed: 01/16/2023]
Abstract
A protocol for the direct analysis of the phospholipid composition in the whole body of adult soil nematode, Caenorhabditis elegans (C. elegans), was developed, which combined freeze-cracking of the exoskeletal cuticle and matrix-assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS). Biomolecules in the m/z range from 700 to 900 were more effectively detected in the freeze-cracked than from simple frozen adult nematode bodies. Different distribution of biomolecules was observed in a nematode body when the matrix was applied with a sublimation deposition method. The whole-body IMS technique was applied on genetically deficient mutant C. elegans to combine whole-body lipidomics and genetics, by comparing the fatty acid compositions, especially of the phosphatidylcholine (PC) species, between the wild-type and fat-1 mutants, which lack the gene encoding an n-3 fatty acid desaturase. A significant reduction of PC(20:5/20:5) and PC(20:4/20:5) and a marked increase of PC(20:4/20:4), PC(20:3/20:4), and PC(20:3/20:3) were detected in the fat-1 mutants in positive ion mode. In addition, phospholipid compositions other than PCs were analyzed in negative ion mode. A loss of a possible phosphatidylinositol (PI) with 18:0/20:5 and a compensative accumulation of putative PI(18:0/20:4) were detected in the fat-1 mutants. In conclusion, the whole-body MALDI-IMS technique is useful for the profiling of multiple biomolecules in C. elegans in both intra- and inter-individual levels.
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179
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Fagerer SR, Römpp A, Jefimovs K, Brönnimann R, Hayenga G, Steinhoff RF, Krismer J, Pabst M, Ibáñez AJ, Zenobi R. Resolution pattern for mass spectrometry imaging. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:1019-1024. [PMID: 26044268 DOI: 10.1002/rcm.7191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/05/2015] [Accepted: 03/07/2015] [Indexed: 06/04/2023]
Abstract
RATIONALE Up to now, there is no 'gold standard' for determining the resolution of a mass spectrometry imaging (MSI) setup (comprising the instrument, the sample preparation, the sample and the instrument settings). A standard sample in combination with a standard protocol to define the MSI resolution would be desirable in order to compare the setups of different laboratories, and as a regular quality control/performance check. METHODS Microstructured resolution patterns were fabricated that can be used to determine the spatial resolution in MSI experiments, down to the range of a few µm. Two different strategies were employed, one where the resolution pattern is laser machined into a thin metal foil, which can be placed over a sample to be imaged, and a second one where hydrophilic grooves are machined into an omniphobic coating covering the surface of an indium tin oxide covered glass slide. When dragging a sample solution over the slide's surface, the sample is automatically retained in the hydrophilic grooves, but repelled by the omniphobic coating. RESULTS The technology was tested on a commercial matrix-assisted laser desorption/ionization (MALDI) imaging instrument, and a spatial resolution in the vicinity of 50 µm was determined. The finest features of the microstructured resolution patterns are compatible with the best spatial resolution of MALDI imaging systems available to date. CONCLUSIONS The use of metal resolution grids or glass slides with hydrophilic/hydrophobic structures is suitable for the convenient determination of the resolution limit of the MALDI imaging instrument as determined by its hardware. These structures are straightforward both to produce and to use.
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Affiliation(s)
- Stephan R Fagerer
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
| | - Andreas Römpp
- University of Giessen, Institute of Inorganic and Analytical Chemistry, Schubertstrasse 60, D-35392, Giessen, Germany
| | - Konstantins Jefimovs
- EMPA (Swiss Federal Laboratories for Material Science and Technology), Überlandstrasse 129, Dübendorf, Switzerland
| | - Rolf Brönnimann
- EMPA (Swiss Federal Laboratories for Material Science and Technology), Überlandstrasse 129, Dübendorf, Switzerland
| | - Gerd Hayenga
- Sigma-Aldrich Chemie GmbH, Industriestrasse 25, Buchs (SG), Switzerland
| | - Robert F Steinhoff
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
| | - Jasmin Krismer
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
| | - Martin Pabst
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
| | - Alfredo J Ibáñez
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
| | - Renato Zenobi
- ETH Zürich, Department of Chemistry and Applied Biosciences, 8093, Zürich, Switzerland
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180
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Guo S, Wang Y, Zhou D, Li Z. Electric Field-Assisted Matrix Coating Method Enhances the Detection of Small Molecule Metabolites for Mass Spectrometry Imaging. Anal Chem 2015; 87:5860-5. [DOI: 10.1021/ac504761t] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shuai Guo
- Department
of Biophysics and Structural Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dongdan
San Tiao, Beijing 100005, PR China
| | - Yanmin Wang
- Department
of Clinical Laboratory, Heze Municipal Hospital, No. 2888, Caozhou Road, Shandong 274031, PR China
| | - Dan Zhou
- Department
of Biophysics and Structural Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dongdan
San Tiao, Beijing 100005, PR China
| | - Zhili Li
- Department
of Biophysics and Structural Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dongdan
San Tiao, Beijing 100005, PR China
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181
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Lauzon N, Dufresne M, Chauhan V, Chaurand P. Development of laser desorption imaging mass spectrometry methods to investigate the molecular composition of latent fingermarks. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:878-886. [PMID: 25846823 DOI: 10.1007/s13361-015-1123-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 06/04/2023]
Abstract
For a century, fingermark analysis has been one of the most important and common methods in forensic investigations. Modern chemical analysis technologies have added the potential to determine the molecular composition of fingermarks and possibly identify chemicals a suspect may have come into contact with. Improvements in analytical detection of the molecular composition of fingermarks is therefore of great importance. In this regard, matrix-assisted laser desorption ionization (MALDI) and laser desorption ionization (LDI) imaging mass spectrometry (IMS) have proven to be useful technologies for fingermark analysis. In these analyses, the choice of ionizing agent and its mode of deposition are critical steps for the identification of molecular markers. Here we propose two novel and complementary IMS approaches for endogenous and exogenous substance detection in fingermarks: sublimation of 2-mercaptobenzothiazol (2-MBT) matrix and silver sputtering.
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Affiliation(s)
- Nidia Lauzon
- Department of Chemistry, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
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182
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Improvement of chlorophyll identification in foodstuffs by MALDI ToF/ToF mass spectrometry using 1,5-diaminonaphthalene electron transfer secondary reaction matrix. Anal Bioanal Chem 2015; 407:6369-79. [PMID: 25976392 DOI: 10.1007/s00216-015-8728-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/16/2015] [Accepted: 04/20/2015] [Indexed: 10/23/2022]
Abstract
Chlorophylls (Chls) are important pigments responsible for the characteristic green color of chloroplasts in algae and plants. In this study, 1,5-diaminonaphthalene (DAN) was introduced as an electron transfer secondary reaction matrix for the identification of intact chlorophylls and their derivatives, by matrix-assisted laser desorption ionization (MALDI) mass spectrometry (MS). DAN was proved to drastically outperform conventional matrices such as α-cyano-4-hydroxycinnnamic acid, dithranol, antracene, and even terthiophene, since loss of the metal ion and fragmentation of the phytol-ester linkage are negligible. Absence of significant fragmentation of radical cations of Chls a and b at m/z 892.529 and 906.513, respectively, makes MALDI MS capable of following natural degradation of intact porphyrin-based pigments whose initial steps are just represented by demetalation and dephytylation. Chl by-products, such as pyropheophytins, have been identified in dried tea leaves showing the potential of MALDI MS to follow chlorophyll biotransformation occurring in processed foodstuffs. Finally, preliminary results show the potential of MALDI MS to detect illegal vegetable oil re-greening practices.
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183
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Garate J, Fernández R, Lage S, Bestard-Escalas J, Lopez DH, Reigada R, Khorrami S, Ginard D, Reyes J, Amengual I, Barceló-Coblijn G, Fernández JA. Imaging mass spectrometry increased resolution using 2-mercaptobenzothiazole and 2,5-diaminonaphtalene matrices: application to lipid distribution in human colon. Anal Bioanal Chem 2015; 407:4697-708. [PMID: 25903024 DOI: 10.1007/s00216-015-8673-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 02/06/2023]
Abstract
Imaging mass spectrometry is becoming a reference technique in the field of lipidomics, due to its ability to map the distribution of hundreds of species in a single run, along a tissue section. The next frontier is now achieving increasing resolution powers to offer cellular (or even sub-cellular) resolution. Thus, the new spectrometers are equipped with sophisticated optical systems to decrease the laser spot to <30 μm. Here, we demonstrate that by using the correct matrix (i.e., a matrix that maximizes ion detection and forms small crystals) and a careful preparation, it is possible to achieve resolutions of ∼5-10 μm, even with spectrometers equipped with non-optimal optics, which produces laser spots of 50 μm or even larger. As a proof of concept, we present images of distributions of lipids, both in positive and negative ion mode, over human colon endoscopic sections, recorded using 2-mercaptobenzothiazole for positive ion mode and 2,5-diaminonaphtalene for negative ion mode and an LTQ-Orbitrap XL, equipped with a matrix-assisted laser desorption ionization (MALDI) source that produces astigmatic laser spots. Graphical Abstract Imaging mass spectrometry is becoming an invaluable technique to complement traditional histology, but still higher resolutions are required. Here we deal with such issue.
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Affiliation(s)
- Jone Garate
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
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184
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MALDI Imaging mass spectrometry: current frontiers and perspectives in pathology research and practice. J Transl Med 2015; 95:422-31. [PMID: 25621874 DOI: 10.1038/labinvest.2014.156] [Citation(s) in RCA: 292] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 11/07/2014] [Accepted: 11/07/2014] [Indexed: 01/14/2023] Open
Abstract
MALDI Imaging mass spectrometry has entered the field of tissue-based research by providing unique advantages for analyzing tissue specimen in an unprecedented detail. A broad spectrum of analytes ranging from proteins, peptides, protein modification over small molecules, drugs and their metabolites as well as pharmaceutical components, endogenous cell metabolites, lipids, and other analytes are made accessible by this in situ technique in tissue. Some of them were even not accessible in tissues within the histological context before. Thereby, the great advantage of MALDI Imaging is the correlation of molecular information with traditional histology by keeping the spatial localization information of the analytes after mass spectrometric measurement. This method is label-free and allows multiplex analysis of hundreds to thousands of molecules in the very same tissue section simultaneously. Imaging mass spectrometry brings a new quality of molecular data and links the expert discipline of pathology and deep molecular mass spectrometric analysis to tissue-based research. This review will focus on state-of-the-art of MALDI Imaging mass spectrometry, its recent applications by analyzing tissue specimen and the contributions in understanding the biology of disease as well as its perspectives for pathology research and practice.
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185
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Prentice BM, Chumbley CW, Caprioli RM. High-speed MALDI MS/MS imaging mass spectrometry using continuous raster sampling. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:703-10. [PMID: 26149115 PMCID: PMC4498415 DOI: 10.1002/jms.3579] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/30/2015] [Accepted: 02/09/2015] [Indexed: 05/03/2023]
Abstract
A matrix-assisted laser desorption/ionization time of flight/time of flight tandem mass spectrometer (MALDI TOF/TOF) has been used for high-speed precursor/fragment ion transition image acquisition. High-throughput analysis is facilitated by an Nd:YLF solid state laser capable of pulse repetition rates up to 5 kHz, a high digitizer acquisition rate (up to 50 pixels/s), and continuous laser raster sampling. MS/MS experiments are enabled through the use of a precision timed ion selector, second source acceleration, and a dedicated collision cell. Continuous raster sampling is shown here to facilitate rapid MS/MS ion image acquisition from thin tissue sections for the drug rifampicin and for a common kidney lipid, SM4s(d18:1/24:1). The ability to confirm the structural identity of an analyte as part of the MS/MS imaging experiment is an essential part of the analysis. Additionally, the increase in sensitivity and specificity afforded by an MS/MS approach is highly advantageous, especially when interrogating complex chemical environments such as those in biological tissues. Herein, we report continuous laser raster sampling TOF/TOF imaging methodologies which demonstrate 8 to 14-fold increases in throughput compared with existing MS/MS instrumentation, an important advantage when imaging large areas on tissues.
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Affiliation(s)
- Boone M. Prentice
- Department of Biochemistry, Nashville, TN 37232
- Mass Spectrometry Research Center, Nashville, TN 37232
| | - Chad W. Chumbley
- Department of Chemistry, Nashville, TN 37232
- Mass Spectrometry Research Center, Nashville, TN 37232
| | - Richard M. Caprioli
- Department of Biochemistry, Nashville, TN 37232
- Department of Chemistry, Nashville, TN 37232
- Departments of Pharmacology and Medicine, Nashville, TN 37232
- Mass Spectrometry Research Center, Nashville, TN 37232
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186
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In situ drug and metabolite analysis [corrected] in biological and clinical research by MALDI MS imaging. Bioanalysis 2015; 6:1241-53. [PMID: 24946924 DOI: 10.4155/bio.14.88] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In recent years the analysis in mass spectrometry (MS) [corrected] imaging has been expanded to detect a wide variety of low molecular weight compounds (LMWC), including exogenous and endogenous compounds. The high sensitivity and selectivity of MS imaging combined with visualization of molecular spatial distribution in tissues, makes it a valuable [corrected] platform in targeted drug and untargeted metabolomic analysis [corrected] in biological and clinical research. Here, we review the current and potential applications of MALDI MS imaging in these areas. The aim of advancing MALDI MS imaging in the field of LMWC is to support clinical applications by understanding drug and drug-metabolite distribution, investigating toxicity and discovering [corrected] new biomarkers.
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187
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Anderson DMG, Floyd KA, Barnes S, Clark JM, Clark JI, Mchaourab H, Schey KL. A method to prevent protein delocalization in imaging mass spectrometry of non-adherent tissues: application to small vertebrate lens imaging. Anal Bioanal Chem 2015; 407:2311-20. [PMID: 25665708 DOI: 10.1007/s00216-015-8489-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/05/2015] [Accepted: 01/13/2015] [Indexed: 11/29/2022]
Abstract
MALDI imaging requires careful sample preparation to obtain reliable, high-quality images of small molecules, peptides, lipids, and proteins across tissue sections. Poor crystal formation, delocalization of analytes, and inadequate tissue adherence can affect the quality, reliability, and spatial resolution of MALDI images. We report a comparison of tissue mounting and washing methods that resulted in an optimized method using conductive carbon substrates that avoids thaw mounting or washing steps, minimizes protein delocalization, and prevents tissue detachment from the target surface. Application of this method to image ocular lens proteins of small vertebrate eyes demonstrates the improved methodology for imaging abundant crystallin protein products. This method was demonstrated for tissue sections from rat, mouse, and zebrafish lenses resulting in good-quality MALDI images with little to no delocalization. The images indicate, for the first time in mouse and zebrafish, discrete localization of crystallin protein degradation products resulting in concentric rings of distinct protein contents that may be responsible for the refractive index gradient of vertebrate lenses.
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Affiliation(s)
- David M G Anderson
- Department of Biochemistry, Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN, 37205-0146, USA
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188
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Barceló-Coblijn G, Fernández JA. Mass spectrometry coupled to imaging techniques: the better the view the greater the challenge. Front Physiol 2015; 6:3. [PMID: 25657625 PMCID: PMC4302787 DOI: 10.3389/fphys.2015.00003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/06/2015] [Indexed: 11/13/2022] Open
Abstract
These are definitively exciting times for membrane lipid researchers. Once considered just as the cell membrane building blocks, the important role these lipids play is steadily being acknowledged. The improvement occurred in mass spectrometry techniques (MS) allows the establishment of the precise lipid composition of biological extracts. However, to fully understand the biological function of each individual lipid species, we need to know its spatial distribution and dynamics. In the past 10 years, the field has experienced a profound revolution thanks to the development of MS-based techniques allowing lipid imaging (MSI). Images reveal and verify what many lipid researchers had already shown by different means, but none as convincing as an image: each cell type presents a specific lipid composition, which is highly sensitive to its physiological and pathological state. While these techniques will help to place membrane lipids in the position they deserve, they also open the black box containing all the unknown regulatory mechanisms accounting for such tailored lipid composition. Thus, these results urges to different disciplines to redefine their paradigm of study by including the complexity revealed by the MSI techniques.
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Affiliation(s)
- Gwendolyn Barceló-Coblijn
- Lipids in Human Pathology, Research Unit, Hospital Universitari Son Espases, Institut d'Investigació Sanitària de Palma (IdISPa) Palma, Spain
| | - José A Fernández
- Departamento de Química-Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU) Leioa, Spain
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189
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Gemperline E, Li L. MALDI-MS-assisted molecular imaging of metabolites in legume plants. Methods Mol Biol 2015; 1203:29-40. [PMID: 25361664 DOI: 10.1007/978-1-4939-1357-2_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mass spectrometric imaging (MSI) is a powerful analytical tool that provides spatial information of several compounds in a single experiment. This technique has been used extensively to study proteins, peptides, and lipids, and is becoming more common for studying small molecules such as endogenous metabolites. With matrix-assisted laser desorption/ionization (MALDI)-MSI, spatial distributions of multiple metabolites can be simultaneously detected within a biological tissue section. Herein, we present a method developed specifically for imaging metabolites in legume plant roots and root nodules which can be adapted for studying metabolites in other legume organs and even other biological tissue samples. We focus on essential steps such as sample preparation and matrix application, comparing several useful techniques, and present a standard workflow that can be easily modified for different tissue types and instrumentation.
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Affiliation(s)
- Erin Gemperline
- Department of Chemistry, University of Wisconsin-Madison, 5232 Rennebohm Hall, 777 Highland Avenue, Madison, WI, 53705-2222, USA
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190
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Korte AR, Yagnik GB, Feenstra AD, Lee YJ. Multiplex MALDI-MS imaging of plant metabolites using a hybrid MS system. Methods Mol Biol 2015; 1203:49-62. [PMID: 25361666 DOI: 10.1007/978-1-4939-1357-2_6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Plant tissues present intriguing systems for study by mass spectrometry imaging, as they exhibit a complex metabolism and a high degree of spatial localization. This chapter presents a methodology for preparation of plant tissue sections for matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) analysis and the use of a hybrid mass spectrometer for "multiplex" imaging. The multiplex method described here provides a wide range of analytical information, including high-resolution, accurate mass imaging and tandem MS scans for structural information, all within a single experiment. While this procedure was developed for plant tissues, it can be readily adapted for analysis of other sample types.
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Affiliation(s)
- Andrew R Korte
- Department of Chemistry, Iowa State University of Science and Technology, Ames, IA, USA
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191
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Wang X, Han J, Yang J, Pan J, Borchers CH. Matrix coating assisted by an electric field (MCAEF) for enhanced tissue imaging by MALDI-MS. Chem Sci 2015; 6:729-738. [PMID: 28706636 PMCID: PMC5494562 DOI: 10.1039/c4sc01850h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Accepted: 09/09/2014] [Indexed: 01/13/2023] Open
Abstract
A novel technique, termed matrix coating assisted by an electric field (MCAEF), for enhancing tissue imaging by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) was developed in this study. In this technique a static and uniform electric field is applied to sliced tissue sections during matrix spray-coating, resulting in the enrichment of positively or negatively chargeable analytes in the MALDI matrix layer. Experimental results show that MCAEF not only increased the sensitivity of lipid and protein detection across the board in the subsequent MALDI-MS analyses, but also resulted in successful imaging of a larger number of analytes. MALDI imaging enhancement with MCAEF was observed for various tissues (rat liver, rat brain, and porcine adrenal gland) and with different MALDI matrices (e.g., quercetin, 2-mercaptobenzothiazole, dithranol, 9-aminoacridine, and sinapinic acid) and the sensitivity increases were independent of the solvent compositions and pH values of the matrix solutions. Taking rat brain as an example, MCAEF led to the on-tissue detection and imaging of 648 identified lipids by combining positive and negative ion detection by MALDI-Fourier transform ion cyclotron resonance MS and with quercetin as the matrix, as compared to only 344 lipids without MCAEF. For protein imaging, up to 232 protein signals were successfully detected in rat brain tissue sections by MALDI-time-of-flight MS within a mass range of 3500 to 37 000 Da, as compared to 119 without MCAEF. MCAEF also enabled the detection of higher molecular-weight proteins. These results demonstrate the advantages of MCAEF for overall performance improvements in MALDI imaging and we believe that this technique has the potential to become a standard practice for MALDI tissue imaging.
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Affiliation(s)
- Xiaodong Wang
- University of Victoria - Genome British Columbia Proteomics Centre , Vancouver Island Technology Park, #3101-4464 Markham St. , Victoria , BC V8Z 7X8 , Canada . ; ; Tel: +1-250-483-3221
| | - Jun Han
- University of Victoria - Genome British Columbia Proteomics Centre , Vancouver Island Technology Park, #3101-4464 Markham St. , Victoria , BC V8Z 7X8 , Canada . ; ; Tel: +1-250-483-3221
| | - Juncong Yang
- University of Victoria - Genome British Columbia Proteomics Centre , Vancouver Island Technology Park, #3101-4464 Markham St. , Victoria , BC V8Z 7X8 , Canada . ; ; Tel: +1-250-483-3221
| | - Jingxi Pan
- University of Victoria - Genome British Columbia Proteomics Centre , Vancouver Island Technology Park, #3101-4464 Markham St. , Victoria , BC V8Z 7X8 , Canada . ; ; Tel: +1-250-483-3221
| | - Christoph H Borchers
- University of Victoria - Genome British Columbia Proteomics Centre , Vancouver Island Technology Park, #3101-4464 Markham St. , Victoria , BC V8Z 7X8 , Canada . ; ; Tel: +1-250-483-3221
- Department of Biochemistry and Microbiology , University of Victoria , Petch Building Room 207, 3800 Finnerty Rd. , Victoria , BC V8P 5C2 , Canada
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192
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Feenstra AD, Hansen RL, Lee YJ. Multi-matrix, dual polarity, tandem mass spectrometry imaging strategy applied to a germinated maize seed: toward mass spectrometry imaging of an untargeted metabolome. Analyst 2015; 140:7293-304. [DOI: 10.1039/c5an01079a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mass spectrometry imaging strategy to allow for visualization and identification of compounds on tissue to help understand plant metabolism.
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Affiliation(s)
- Adam D. Feenstra
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
| | - Rebecca L. Hansen
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
| | - Young Jin Lee
- Department of Chemistry
- Iowa State University
- Ames
- USA
- Ames Laboratory-US DOE
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193
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Crecelius AC, Schubert US, von Eggeling F. MALDI mass spectrometric imaging meets “omics”: recent advances in the fruitful marriage. Analyst 2015; 140:5806-20. [DOI: 10.1039/c5an00990a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI MSI) is a method that allows the investigation of the molecular content of surfaces, in particular, tissues, within its morphological context.
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Affiliation(s)
- A. C. Crecelius
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - U. S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - F. von Eggeling
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Institute of Physical Chemistry
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194
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Abstract
Enriched by a decade of remarkable developments, matrix-assisted laser desorption ionization imaging mass spectrometry (MALDI IMS) has witnessed a phenomenal expansion. Initially introduced for the mapping of peptides and intact proteins from mammalian tissue sections, MALDI IMS applications now extend to a wide range of molecules including peptides, lipids, metabolites and xenobiotics. Technology and methodology are quickly evolving to push the limits of the technique forward. Within a short period of time, numerous protocols and concepts have been developed and introduced in tissue section preparation, nonexhaustively including in situ tissue chemistries and solvent-free matrix depositions. Considering the past progress and current capabilities, this Review aims to cover the different aspects and challenges of tissue section preparation for MALDI IMS.
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195
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Ly A, Schöne C, Becker M, Rattke J, Meding S, Aichler M, Suckau D, Walch A, Hauck SM, Ueffing M. High-resolution MALDI mass spectrometric imaging of lipids in the mammalian retina. Histochem Cell Biol 2014; 143:453-62. [DOI: 10.1007/s00418-014-1303-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2014] [Indexed: 12/12/2022]
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196
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Affiliation(s)
- Bernhard Spengler
- Justus Liebig University Giessen, Institute of Inorganic and Analytical
Chemistry, Schubertstrasse
60, Building 16, 35392 Giessen, Germany
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197
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Wang J, Qiu S, Chen S, Xiong C, Liu H, Wang J, Zhang N, Hou J, He Q, Nie Z. MALDI-TOF MS Imaging of Metabolites with a N-(1-Naphthyl) Ethylenediamine Dihydrochloride Matrix and Its Application to Colorectal Cancer Liver Metastasis. Anal Chem 2014; 87:422-30. [DOI: 10.1021/ac504294s] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jianing Wang
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Shulan Qiu
- The Key Laboratory of Remodeling-Related Cardiovascular
Diseases, Capital Medical University, Ministry of Education, Beijing
Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen
Hospital Affiliated to the Capital Medical University, Beijing 100029, China
| | - Suming Chen
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Caiqiao Xiong
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Huihui Liu
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Jiyun Wang
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Ning Zhang
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Jian Hou
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Qing He
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Zongxiu Nie
- Key Laboratory
of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
- Beijing Center for Mass Spectrometry, Beijing 100190, China
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198
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Gut Y, Boiret M, Bultel L, Renaud T, Chetouani A, Hafiane A, Ginot YM, Jennane R. Application of chemometric algorithms to MALDI mass spectrometry imaging of pharmaceutical tablets. J Pharm Biomed Anal 2014; 105:91-100. [PMID: 25543287 DOI: 10.1016/j.jpba.2014.11.047] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 11/25/2014] [Accepted: 11/27/2014] [Indexed: 01/31/2023]
Abstract
During drug product development, the nature and distribution of the active substance have to be controlled to ensure the correct activity and the safety of the final medication. Matrix assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI), due to its structural and spatial specificities, provides an excellent way to analyze these two critical parameters in the same acquisition. The aim of this work is to demonstrate that MALDI-MSI, coupled with four well known multivariate statistical analysis algorithms (PCA, ICA, MCR-ALS and NMF), is a powerful technique to extract spatial and spectral information about chemical compounds from known or unknown solid drug product formulations. To test this methodology, an in-house manufactured tablet and a commercialized Coversyl(®) tablet were studied. The statistical analysis was decomposed into three steps: preprocessing, estimation of the number of statistical components (manually or using singular value decomposition), and multivariate statistical analysis. The results obtained showed that while principal component analysis (PCA) was efficient in searching for sources of variation in the matrix, it was not the best technique to estimate an unmixing model of a tablet. Independent component analysis (ICA) was able to extract appropriate contributions of chemical information in homogeneous and heterogeneous datasets. Non-negative matrix factorization (NMF) and multivariate curve resolution-alternating least squares (MCR-ALS) were less accurate in obtaining the right contribution in a homogeneous sample but they were better at distinguishing the semi-quantitative information in a heterogeneous MALDI dataset.
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Affiliation(s)
- Yoann Gut
- University Orléans, PRISME Laboratory, EA 4229, 12, rue De Blois, BP 6744, F-45072 Orléans, France; Technologie Servier, 27 rue Eugène Vignat, 45000 Orléans, France.
| | - Mathieu Boiret
- Technologie Servier, 27 rue Eugène Vignat, 45000 Orléans, France
| | - Laurent Bultel
- Technologie Servier, 27 rue Eugène Vignat, 45000 Orléans, France
| | - Tristan Renaud
- Technologie Servier, 27 rue Eugène Vignat, 45000 Orléans, France
| | - Aladine Chetouani
- University Orléans, PRISME Laboratory, EA 4229, 12, rue De Blois, BP 6744, F-45072 Orléans, France
| | - Adel Hafiane
- INSA-CVL, PRISME Laboratory, EA 4229, Avenue Lahitolle, F-18020 Bourges, France
| | | | - Rachid Jennane
- University Orléans, I3MTO Laboratory, EA 4708, 8, rue Léonard de Vinci, BP 6744, F-45072 Orléans, France
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199
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Fournaise E, Chaurand P. Increasing specificity in imaging mass spectrometry: high spatial fidelity transfer of proteins from tissue sections to functionalized surfaces. Anal Bioanal Chem 2014; 407:2159-66. [DOI: 10.1007/s00216-014-8300-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 10/23/2014] [Accepted: 10/24/2014] [Indexed: 01/05/2023]
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200
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Jadoul L, Longuespée R, Noël A, De Pauw E. A spiked tissue-based approach for quantification of phosphatidylcholines in brain section by MALDI mass spectrometry imaging. Anal Bioanal Chem 2014; 407:2095-106. [PMID: 25326885 DOI: 10.1007/s00216-014-8232-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 09/28/2014] [Accepted: 10/01/2014] [Indexed: 10/24/2022]
Abstract
In the last few years, matrix-assisted laser desorption/ionization (MALDI) mass spectrometry imaging (MSI) has been successfully used to study the distribution of lipids within tissue sections. However, few efforts have been made to acquire reliable quantitative data regarding the localized concentrations of these molecules. Here we propose an approach based on brain homogenates for the quantification of phosphatidylcholines (PCs) in brain section by MALDI MSI. Homogenates were spiked with a range of PC(16:0 d31/18:1) concentrations. Sections from homogenates and intact brain were simultaneously prepared before being analyzed by MALDI MSI using a Fourier transform ion cyclotron resonance (FT-ICR) analyzer. Standard curves were generated from the signal intensity of the different PC(16:0 d31/18:1) ionic species ([M+H](+), [M+Na](+) and [M+K](+)) detected from the homogenate sections. Localized quantitative data were finally extracted by correlating the standard curves with the signal intensities of endogenous PC (especially PC(16:0/18:1)) ionic species detected on different areas of the brain section. They were consistent with quantitative values found in the literature. This work introduces a new method to take directly into account biological matrix effects for the quantification of lipids as well as other endogenous compounds, in tissue sections by MALDI MSI.
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Affiliation(s)
- Laure Jadoul
- Mass Spectrometry Laboratory, Department of Chemistry, GIGA-Research, University of Liège, 4000, Liège, Belgium,
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