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Yan X, Zhao X, Zhou Z, McKay A, Brunet A, Zare RN. Cell-Type-Specific Metabolic Profiling Achieved by Combining Desorption Electrospray Ionization Mass Spectrometry Imaging and Immunofluorescence Staining. Anal Chem 2020; 92:13281-13289. [PMID: 32880432 PMCID: PMC8782277 DOI: 10.1021/acs.analchem.0c02519] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cell-type-specific metabolic profiling in tissue with heterogeneous composition has been of great interest across all mass spectrometry imaging (MSI) technologies. We report here a powerful new chemical imaging capability in desorption electrospray ionization (DESI) MSI, which enables cell-type-specific and in situ metabolic profiling in complex tissue samples. We accomplish this by combining DESI-MSI with immunofluorescence staining using specific cell-type markers. We take advantage of the variable frequency of each distinct cell type in the lateral septal nucleus (LSN) region of mouse forebrain. This allows computational deconvolution of the cell-type-specific metabolic profile in neurons and astrocytes by convex optimization-a machine learning method. Based on our approach, we observed 107 metabolites that show different distributions and intensities between astrocytes and neurons. We subsequently identified 23 metabolites using high-resolution mass spectrometry (MS) and tandem MS, which include small metabolites such as adenosine and N-acetylaspartate previously associated with astrocytes and neurons, respectively, as well as accumulation of several phospholipid species in neurons which have not been studied before. Overall, this method overcomes the relatively low spatial resolution of DESI-MSI and provides a new platform for in situ metabolic investigation at the cell-type level in complex tissue samples with heterogeneous cell-type composition.
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Affiliation(s)
- Xin Yan
- Department of Chemistry, Texas A&M University, College Station, TX 77843.; Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Xiaoai Zhao
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Zhenpeng Zhou
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Andrew McKay
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Anne Brunet
- Glenn Laboratories for the Biology of Aging, Stanford University, Stanford, CA 94305, USA; Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Richard N. Zare
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
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2
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Brill AR, Kuntumalla MK, de Ruiter G, Koren E. Formation of Highly Ordered Self-Assembled Monolayers on Two-Dimensional Materials via Noncovalent Functionalization. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33941-33949. [PMID: 32589020 DOI: 10.1021/acsami.0c09722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Functionalized two-dimensional materials (2DMs) are attracting much attention due to their promising applications in nanoscale devices. Producing continuous and homogeneous surface assemblies with a high degree of order has been challenging. In this work, we demonstrate that by noncovalently self-assembling molecular platforms on 2DMs, high-quality and highly ordered monolayers can be generated. The high degree of order and uniformity of the self-assembled monolayer layers were confirmed by a variety of analytic techniques including time-of-flight secondary ion mass spectrometry, scanning tunnelling microscopy, X-ray photoelectron spectroscopy, and atomic force microscopy. Furthermore, by selectively enhancing the molecular vibrations of the molecular platform, via a combination of graphene-enhanced Raman spectroscopy (GERS) and surface-enhanced Raman spectroscopy (SERS), we were able to determine the orientation of self-assembled molecular platforms with respect to the surface normal. The selective enhancement of the vibrational modes occurs by taking advantage of the distance dependence of the Raman enhancement either by the graphene surface (GERS) or the silver nanoparticules (SERS) that are located on top of the self-assembled monolayer.
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Affiliation(s)
- Adam R Brill
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
- Faculty of Materials Science and Engineering, Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Mohan Kumar Kuntumalla
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Graham de Ruiter
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Elad Koren
- Faculty of Materials Science and Engineering, Israel Institute of Technology, Technion City, Haifa 3200008, Israel
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3
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Gorman BL, Brunet MA, Pham SN, Kraft ML. Measurement of Absolute Concentration at the Subcellular Scale. ACS NANO 2020; 14:6414-6419. [PMID: 32510923 DOI: 10.1021/acsnano.0c04285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The concentration of a pharmaceutical drug or bioactive metabolite within the target organelle influences the effects elicited by the drug or metabolite. Although the relative concentrations of many compounds of interest within subcellular compartments have been measured, measurements of absolute concentrations in the organelle remain elusive. In this Perspective, we discuss a significant advance in using nano secondary ion mass spectrometry (nanoSIMS) to measure the absolute concentration of a 13C-labeled metabolite within secretory vesicles, as reported by Thomen et al. in the April issue of ACS Nano.
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4
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Subcellular Chemical Imaging: New Avenues in Cell Biology. Trends Cell Biol 2020; 30:173-188. [DOI: 10.1016/j.tcb.2019.12.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/10/2019] [Accepted: 12/17/2019] [Indexed: 12/31/2022]
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5
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Gyngard F, Steinhauser ML. Biological explorations with nanoscale secondary ion mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 2019; 34:1534-1545. [PMID: 34054180 PMCID: PMC8158666 DOI: 10.1039/c9ja00171a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Investigation of biological processes at the single cell or subcellular level is critical in order to better understand heterogenous cell populations. Nanoscale secondary ion mass spectrometry (NanoSIMS) enables multiplexed, quantitative imaging of the elemental composition of a sample surface at high resolution (< 50 nm). Through measurement of two different isotopic variants of any given element, NanoSIMS provides nanoscale isotope ratio measurements. When coupled with stable isotope tracer methods, the measurement of isotope ratios functionally illuminates biochemical pathways at suborganelle resolution. In this review, we describe the practical application of NanoSIMS to study biological processes in organisms ranging from microbes to humans, highlighting experimental applications that have provided insight that is largely unattainable by other methods.
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Affiliation(s)
- Frank Gyngard
- Center for NanoImaging, Division of Genetics, Brigham and Women's Hospital, Boston, MA
- Harvard Medical School, Boston, MA
| | - Matthew L Steinhauser
- Center for NanoImaging, Division of Genetics, Brigham and Women's Hospital, Boston, MA
- Harvard Medical School, Boston, MA
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6
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Copper distribution in breast cancer cells detected by time-of-flight secondary ion mass spectrometry with delayed extraction methodology. Biointerphases 2018; 13:06E412. [PMID: 30577697 DOI: 10.1116/1.5053814] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Copper (Cu) is an essential transition metal ion that acts as a cofactor in many key enzymes. Cu is also needed for several hallmarks of cancer, and many copper-binding proteins are upregulated in various cancers. However, Cu-dependent cellular mechanisms and molecular pathways involved in cancer progression are not known. Fundamental to a better understanding of such phenomena is the investigation of the Cu subcellular distribution in cancer cells. The authors here show that Time-of-Flight Secondary Ion Mass Spectrometry combined with delayed extraction can be successfully applied to probe Cu localization in fixed MDA-MB-231 breast cancer cells providing subcellular resolution. Interestingly, the authors find Cu to be accumulated at nuclear regions of the cancer cells.
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7
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Observation of endoplasmic reticulum tubules via TOF-SIMS tandem mass spectrometry imaging of transfected cells. Biointerphases 2018; 13:03B409. [PMID: 29482330 DOI: 10.1116/1.5019736] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Advances in three-dimensional secondary ion mass spectrometry (SIMS) imaging have enabled visualizing the subcellular distributions of various lipid species within individual cells. However, the difficulty of locating organelles using SIMS limits efforts to study their lipid compositions. Here, the authors have assessed whether endoplasmic reticulum (ER)-Tracker Blue White DPX®, which is a commercially available stain for visualizing the endoplasmic reticulum using fluorescence microscopy, produces distinctive ions that can be used to locate the endoplasmic reticulum using SIMS. Time-of-flight-SIMS tandem mass spectrometry (MS2) imaging was used to identify positively and negatively charged ions produced by the ER-Tracker stain. Then, these ions were used to localize the stain and thus the endoplasmic reticulum, within individual human embryonic kidney cells that contained higher numbers of endoplasmic reticulum-plasma membrane junctions on their surfaces. By performing MS2 imaging of selected ions in parallel with the precursor ion (MS1) imaging, the authors detected a chemical interference native to the cell at the same nominal mass as the pentafluorophenyl fragment from the ER-Tracker stain. Nonetheless, the fluorine secondary ions produced by the ER-Tracker stain provided a distinctive signal that enabled locating the endoplasmic reticulum using SIMS. This simple strategy for visualizing the endoplasmic reticulum in individual cells using SIMS could be combined with existing SIMS methodologies for imaging intracellular lipid distribution and to study the lipid composition within the endoplasmic reticulum.
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Abstract
Secondary ion mass spectrometry (SIMS) has become an increasingly utilized tool in biologically relevant studies. Of these, high lateral resolution methodologies using the NanoSIMS 50/50L have been especially powerful within many biological fields over the past decade. Here, the authors provide a review of this technology, sample preparation and analysis considerations, examples of recent biological studies, data analyses, and current outlooks. Specifically, the authors offer an overview of SIMS and development of the NanoSIMS. The authors describe the major experimental factors that should be considered prior to NanoSIMS analysis and then provide information on best practices for data analysis and image generation, which includes an in-depth discussion of appropriate colormaps. Additionally, the authors provide an open-source method for data representation that allows simultaneous visualization of secondary electron and ion information within a single image. Finally, the authors present a perspective on the future of this technology and where they think it will have the greatest impact in near future.
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NanoSIMS chemical imaging combined with correlative microscopy for biological sample analysis. Curr Opin Biotechnol 2016; 41:130-135. [PMID: 27506876 DOI: 10.1016/j.copbio.2016.06.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/17/2016] [Accepted: 06/23/2016] [Indexed: 12/18/2022]
Abstract
Nano-scale Secondary Ion Mass Spectrometry (NanoSIMS) is one of the most powerful in situ elemental and isotopic analysis techniques available to biologists. The combination of stable isotope probing with NanoSIMS (nanoSIP) has opened up new avenues for biological studies over the past decade. However, due to limitations inherent with any analytical methodology, additional information from correlative techniques is usually required to address real biological questions. Here we review recent developments in correlative analysis applied to complex biological systems: first, high-resolution tracking of molecules (e.g. peptides, lipids) by correlation with electron microscopy and atomic force microscopy; second, identification of a specific microbial taxon with fluorescence in situ hybridization and quantification of its metabolic capacities; and, third, molecular specific imaging with new probes.
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Jurowski K, Buszewski B, Piekoszewski W. Bioanalytics in Quantitive (Bio)imaging/Mapping of Metallic Elements in Biological Samples. Crit Rev Anal Chem 2016; 45:334-47. [PMID: 25996031 DOI: 10.1080/10408347.2014.941455] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The aim of this article is to describe selected analytical techniques and their applications in the quantitative mapping/(bio)imaging of metals in biological samples. This work presents the advantages and disadvantages as well as the appropriate methods of scope for research. Distribution of metals in biological samples is currently one of the most important issues in physiology, toxicology, pharmacology, and other disciplines where functional information about the distribution of metals is essential. This issue is a subject of research in (bio)imaging/mapping studies, which use a variety of analytical techniques for the identification and determination of metallic elements. Increased interest in analytical techniques enabling the (bio)imaging of metals in a variety of biological material has been observed more recently. Measuring the distribution of trace metals in tissues after a drug dose or ingestion of poison-containing metals allows for the studying of pathomechanisms and the pathophysiology of various diseases and disorders related to the management of metals in human and animal systems.
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Affiliation(s)
- Kamil Jurowski
- a Department of Analytical Chemistry, Faculty of Chemistry , Jagiellonian University in Kraków , Kraków , Poland
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11
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Wirtz T, Philipp P, Audinot JN, Dowsett D, Eswara S. High-resolution high-sensitivity elemental imaging by secondary ion mass spectrometry: from traditional 2D and 3D imaging to correlative microscopy. NANOTECHNOLOGY 2015; 26:434001. [PMID: 26436905 DOI: 10.1088/0957-4484/26/43/434001] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Secondary ion mass spectrometry (SIMS) constitutes an extremely sensitive technique for imaging surfaces in 2D and 3D. Apart from its excellent sensitivity and high lateral resolution (50 nm on state-of-the-art SIMS instruments), advantages of SIMS include high dynamic range and the ability to differentiate between isotopes. This paper first reviews the underlying principles of SIMS as well as the performance and applications of 2D and 3D SIMS elemental imaging. The prospects for further improving the capabilities of SIMS imaging are discussed. The lateral resolution in SIMS imaging when using the microprobe mode is limited by (i) the ion probe size, which is dependent on the brightness of the primary ion source, the quality of the optics of the primary ion column and the electric fields in the near sample region used to extract secondary ions; (ii) the sensitivity of the analysis as a reasonable secondary ion signal, which must be detected from very tiny voxel sizes and thus from a very limited number of sputtered atoms; and (iii) the physical dimensions of the collision cascade determining the origin of the sputtered ions with respect to the impact site of the incident primary ion probe. One interesting prospect is the use of SIMS-based correlative microscopy. In this approach SIMS is combined with various high-resolution microscopy techniques, so that elemental/chemical information at the highest sensitivity can be obtained with SIMS, while excellent spatial resolution is provided by overlaying the SIMS images with high-resolution images obtained by these microscopy techniques. Examples of this approach are given by presenting in situ combinations of SIMS with transmission electron microscopy (TEM), helium ion microscopy (HIM) and scanning probe microscopy (SPM).
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Affiliation(s)
- T Wirtz
- Advanced Instrumentation for Ion Nano-Analytics (AINA), MRT Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, L-4422 Belvaux, Luxembourg
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12
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Liu X, Hummon AB. Mass spectrometry imaging of therapeutics from animal models to three-dimensional cell cultures. Anal Chem 2015; 87:9508-19. [PMID: 26084404 PMCID: PMC4766864 DOI: 10.1021/acs.analchem.5b00419] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Mass spectrometry imaging (MSI) is a powerful label-free technique for the investigation of the spatial distribution of molecules at complex surfaces and has been widely used in the pharmaceutical sciences to understand the distribution of different drugs and their metabolites in various biological samples, ranging from cell-based models to tissues. Here, we review the current applications of MSI for drug studies in animal models, followed by a discussion of the novel advances of MSI in three-dimensional (3D) cell cultures for accurate, efficient, and high-throughput analyses to evaluate therapeutics.
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Affiliation(s)
- Xin Liu
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
| | - Amanda B. Hummon
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
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Feng ZT, Deng YQ, Zhang SC, Liang X, Yuan F, Hao JL, Zhang JC, Sun SF, Wang BS. K(+) accumulation in the cytoplasm and nucleus of the salt gland cells of Limonium bicolor accompanies increased rates of salt secretion under NaCl treatment using NanoSIMS. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 238:286-96. [PMID: 26259195 DOI: 10.1016/j.plantsci.2015.06.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 06/17/2015] [Accepted: 06/22/2015] [Indexed: 05/18/2023]
Abstract
Recretohalophytes with specialized salt-secreting structures (salt glands) can secrete excess salts from plant, while discriminating between Na(+) and K(+). K(+)/Na(+) ratio plays an important role in plant salt tolerance, but the distribution and role of K(+) in the salt gland cells is poorly understood. In this article, the in situ subcellular localization of K and Na in the salt gland of the recretohalophyte Limonium bicolor Kuntze is described. Samples were prepared by high-pressure freezing (HPF), freeze substitution (FS) and analyzed using NanoSIMS. The salt gland of L. bicolor consists of sixteen cells. Higher signal strength of Na(+) was located in the apoplast of salt gland cells. Compared with control, 200 mM NaCl treatment led to higher signal strength of K(+) and Na(+) in both cytoplasm and nucleus of salt gland cells although K(+)/Na(+) ratio in both cytoplasm and nucleus were slightly reduced by NaCl. Moreover, the rate of Na(+) secretion per salt gland of L. bicolor treated with 200 mM NaCl was five times that of controls. These results suggest that K(+) accumulation both in the cytoplasm and nucleus of salt gland cells under salinity may play an important role in salt secretion, although the exact mechanism is unknown.
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Affiliation(s)
- Zhong-Tao Feng
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Yun-Quan Deng
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Shi-Chao Zhang
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Xue Liang
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Fang Yuan
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Jia-Long Hao
- Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
| | - Jian-Chao Zhang
- Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
| | - Shu-Feng Sun
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; Center for Bio-Imaging, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.
| | - Bao-Shan Wang
- Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 250014, China.
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Jiang H, Favaro E, Goulbourne CN, Rakowska PD, Hughes GM, Ryadnov MG, Fong LG, Young SG, Ferguson DJP, Harris AL, Grovenor CRM. Stable isotope imaging of biological samples with high resolution secondary ion mass spectrometry and complementary techniques. Methods 2014; 68:317-24. [PMID: 24556558 PMCID: PMC4222523 DOI: 10.1016/j.ymeth.2014.02.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 01/07/2014] [Accepted: 02/06/2014] [Indexed: 02/07/2023] Open
Abstract
Stable isotopes are ideal labels for studying biological processes because they have little or no effect on the biochemical properties of target molecules. The NanoSIMS is a tool that can image the distribution of stable isotope labels with up to 50 nm spatial resolution and with good quantitation. This combination of features has enabled several groups to undertake significant experiments on biological problems in the last decade. Combining the NanoSIMS with other imaging techniques also enables us to obtain not only chemical information but also the structural information needed to understand biological processes. This article describes the methodologies that we have developed to correlate atomic force microscopy and backscattered electron imaging with NanoSIMS experiments to illustrate the imaging of stable isotopes at molecular, cellular, and tissue scales. Our studies make it possible to address 3 biological problems: (1) the interaction of antimicrobial peptides with membranes; (2) glutamine metabolism in cancer cells; and (3) lipoprotein interactions in different tissues.
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Affiliation(s)
- H Jiang
- Materials Department, Oxford University, Oxford, UK.
| | - E Favaro
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford, UK
| | - C N Goulbourne
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, USA
| | - P D Rakowska
- National Physical Laboratory, Teddington, UK; Department of Chemistry, University College London, London, UK
| | - G M Hughes
- Materials Department, Oxford University, Oxford, UK
| | - M G Ryadnov
- National Physical Laboratory, Teddington, UK; School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
| | - L G Fong
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, USA
| | - S G Young
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, USA; Department of Human Genetics, University of California Los Angeles, Los Angeles, USA
| | - D J P Ferguson
- Nuffield Department of Clinical Laboratory Science, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - A L Harris
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford, UK
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Legin AA, Schintlmeister A, Jakupec MA, Galanski MS, Lichtscheidl I, Wagner M, Keppler BK. NanoSIMS combined with fluorescence microscopy as a tool for subcellular imaging of isotopically labeled platinum-based anticancer drugs. Chem Sci 2014; 5:3135-3143. [PMID: 35919909 PMCID: PMC9273000 DOI: 10.1039/c3sc53426j] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 04/02/2014] [Indexed: 01/04/2023] Open
Abstract
Multi-elemental, isotope selective nano-scale secondary ion mass spectrometry (NanoSIMS) combined with confocal laser-scanning microscopy was used to characterize the subcellular distribution of 15N-labeled cisplatin in human colon cancer cells. These analyses indicated predominant cisplatin colocalisation with sulfur-rich structures in both the nucleus and cytoplasm. Furthermore, colocalisation of platinum with phosphorus-rich chromatin regions was observed, which is consistent with its binding affinity to DNA as the generally accepted crucial target of the drug. Application of 15N-labeled cisplatin and subsequent measurement of the nitrogen isotopic composition and determination of the relative intensities of platinum and nitrogen associated secondary ion signals in different cellular compartments with NanoSIMS suggested partial dissociation of Pt-N bonds during the accumulation process, in particular within nucleoli at elevated cisplatin concentrations. This finding raises the question as to whether the observed intracellular dissociation of the drug has implications for the mechanism of action of cisplatin. Within the cytoplasm, platinum mainly accumulated in acidic organelles, as demonstrated by a direct combination of specific fluorescent staining, confocal laser scanning microscopy and NanoSIMS. Different processing of platinum drugs in acidic organelles might be relevant for their detoxification, as well as for their mode of action.
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Affiliation(s)
- Anton A Legin
- Institute of Inorganic Chemistry, University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
- Research Platform "Translational Cancer Therapy Research", University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
| | - Arno Schintlmeister
- Large-Instrument Facility for Advanced Isotope Research, University of Vienna Althanstrasse 14 A-1090 Vienna Austria
| | - Michael A Jakupec
- Institute of Inorganic Chemistry, University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
- Research Platform "Translational Cancer Therapy Research", University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
| | - Mathea S Galanski
- Institute of Inorganic Chemistry, University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
- Research Platform "Translational Cancer Therapy Research", University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
| | - Irene Lichtscheidl
- Core Facility of Cell Imaging and Ultrastructure Research, University of Vienna Althanstrasse 14 A-1090 Vienna Austria
| | - Michael Wagner
- Large-Instrument Facility for Advanced Isotope Research, University of Vienna Althanstrasse 14 A-1090 Vienna Austria
- Department of Microbiology and Ecosystem Research, Division of Microbial Ecology, University of Vienna Althanstrasse 14 A-1090 Vienna Austria
| | - Bernhard K Keppler
- Institute of Inorganic Chemistry, University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
- Research Platform "Translational Cancer Therapy Research", University of Vienna Waehringer Str. 42 A-1090 Vienna Austria
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Lozić I, Bartlett CA, Shaw JA, Iyer KS, Dunlop SA, Kilburn MR, Fitzgerald M. Changes in subtypes of Ca microdomains following partial injury to the central nervous system. Metallomics 2014; 6:455-64. [PMID: 24425149 DOI: 10.1039/c3mt00336a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rapid changes in Ca(2+) concentration and location in response to injury play key roles in a range of biological systems. However, quantitative analysis of changes in size and distribution of Ca(2+) microdomains in specific cell types in whole tissue samples has been limited by analytical resolution and reliance on indirect Ca(2+) indicator systems. Here, we combine the unique advantages of nanoscale secondary ion mass spectrometry (NanoSIMS) with immunohistochemistry to directly quantify changes in number, size and intensity of Ca microdomains specific to axonal or glial regions vulnerable to spreading damage following neurotrauma. Furthermore, using NanoSIMS allows separate quantification of Ca microdomains according to their co-localization with areas enriched in P. We rapidly excise and cryopreserve optic nerve segments from adult rat at time points ranging from 5 minutes to 3 months after injury, allowing assessment of Ca microdomains dynamics with minimal disruption due to tissue processing. We demonstrate significantly more non-P co-localized Ca microdomains in glial than axonal regions in normal optic nerve. The density of Ca microdomains not co-localized with areas enriched in P rapidly, selectively and significantly decreases after injury; densities of Ca microdomains co-localized with P enriched areas are unchanged. An efflux of Ca(2+) from microdomains not co-localized with P may contribute to the structural and functional deficits observed in nerve vulnerable to spreading damage following neurotrauma. NanoSIMS analyses of Ca microdomains allow quantitative and novel insights into Ca dynamics, applicable to a range of normal, as well as diseased or injured mammalian systems.
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Affiliation(s)
- Ivan Lozić
- BioNano, School of Chemistry and Biochemistry, The University of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Australia
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Masyuko R, Lanni EJ, Sweedler JV, Bohn PW. Correlated imaging--a grand challenge in chemical analysis. Analyst 2013; 138:1924-39. [PMID: 23431559 PMCID: PMC3718397 DOI: 10.1039/c3an36416j] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Correlated chemical imaging is an emerging strategy for acquisition of images by combining information from multiplexed measurement platforms to track, visualize, and interpret in situ changes in the structure, organization, and activities of interesting chemical systems, frequently spanning multiple decades in space and time. Acquiring and correlating information from complementary imaging experiments has the potential to expose complex chemical behavior in ways that are simply not available from single methods applied in isolation, thereby greatly amplifying the information gathering power of imaging experiments. However, in order to correlate image information across platforms, a number of issues must be addressed. First, signals are obtained from disparate experiments with fundamentally different figures of merit, including pixel size, spatial resolution, dynamic range, and acquisition rates. In addition, images are often acquired on different instruments in different locations, so the sample must be registered spatially so that the same area of the sample landscape is addressed. The signals acquired must be correlated in both spatial and temporal domains, and the resulting information has to be presented in a way that is readily understood. These requirements pose special challenges for image cross-correlation that go well beyond those posed in single technique imaging approaches. The special opportunities and challenges that attend correlated imaging are explored by specific reference to correlated mass spectrometric and Raman imaging, a topic of substantial and growing interest.
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Affiliation(s)
- Rachel Masyuko
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
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18
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Lanni EJ, Rubakhin SS, Sweedler JV. Mass spectrometry imaging and profiling of single cells. J Proteomics 2012; 75:5036-5051. [PMID: 22498881 DOI: 10.1016/j.jprot.2012.03.017] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 03/08/2012] [Accepted: 03/13/2012] [Indexed: 11/25/2022]
Abstract
Mass spectrometry imaging and profiling of individual cells and subcellular structures provide unique analytical capabilities for biological and biomedical research, including determination of the biochemical heterogeneity of cellular populations and intracellular localization of pharmaceuticals. Two mass spectrometry technologies-secondary ion mass spectrometry (SIMS) and matrix assisted laser desorption/ionization mass spectrometry (MALDI MS)-are most often used in micro-bioanalytical investigations. Recent advances in ion probe technologies have increased the dynamic range and sensitivity of analyte detection by SIMS, allowing two- and three-dimensional localization of analytes in a variety of cells. SIMS operating in the mass spectrometry imaging (MSI) mode can routinely reach spatial resolutions at the submicron level; therefore, it is frequently used in studies of the chemical composition of subcellular structures. MALDI MS offers a large mass range and high sensitivity of analyte detection. It has been successfully applied in a variety of single-cell and organelle profiling studies. Innovative instrumentation such as scanning microprobe MALDI and mass microscope spectrometers enables new subcellular MSI measurements. Other approaches for MS-based chemical imaging and profiling include those based on near-field laser ablation and inductively-coupled plasma MS analysis, which offer complementary capabilities for subcellular chemical imaging and profiling.
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Affiliation(s)
- Eric J Lanni
- Department of Chemistry and the Beckman Institute of Science and Technology, University of Illinois, Urbana IL 61801, USA
| | - Stanislav S Rubakhin
- Department of Chemistry and the Beckman Institute of Science and Technology, University of Illinois, Urbana IL 61801, USA
| | - Jonathan V Sweedler
- Department of Chemistry and the Beckman Institute of Science and Technology, University of Illinois, Urbana IL 61801, USA.
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Abstract
Imaging MS (IMS) is generating tremendous interest in scientific communities because of its unparalleled capabilities to provide chemical analysis of intact tissue. Advances in analytical chemistry and MS are providing new insights into chemical and biological processes. This review will discuss various IMS platforms and their applications in biomedical and pharmaceutical research.
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Moore KL, Lombi E, Zhao FJ, Grovenor CRM. Elemental imaging at the nanoscale: NanoSIMS and complementary techniques for element localisation in plants. Anal Bioanal Chem 2011; 402:3263-73. [DOI: 10.1007/s00216-011-5484-3] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/28/2011] [Accepted: 10/06/2011] [Indexed: 12/14/2022]
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Szakal C, Narayan K, Fu J, Lefman J, Subramaniam S. Compositional mapping of the surface and interior of mammalian cells at submicrometer resolution. Anal Chem 2011; 83:1207-13. [PMID: 21268648 DOI: 10.1021/ac1030607] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We present progress toward imaging of chemical species within intact mammalian cells using secondary ion mass spectrometry, including the simultaneous mapping of subcellular elemental and molecular species along with intrinsic membrane-specific cellular markers. Results from imaging both the cell surface and cell interior exposed by site-specific focused ion beam milling demonstrate that in-plane resolutions of approximately 400-500 nm can be achieved. The results from mapping cell surface phosphatidylcholine and several other molecular ions present in the cells establish that spatially resolved chemical signatures of individual cells can be derived from novel multivariate analysis and classification of the molecular images obtained at different m/z ratios. The methods we present here for specimen preparation and chemical imaging of cell interiors provide the foundation for obtaining 3D molecular maps of unstained mammalian cells, with particular relevance for probing the subcellular distributions of small molecules, such as drugs and metabolites.
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Affiliation(s)
- Christopher Szakal
- Surface and Microanalysis Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8371, USA.
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