1
|
Dondi C, Tsikritsis D, Vorng JL, Greenidge G, Kepiro IE, Belsey NA, McMahon G, Gilmore IS, Ryadnov MG, Shaw M. Multiparametric physicochemical analysis of a type 1 collagen 3D cell culture model using light and electron microscopy and mass spectrometry imaging. Sci Rep 2025; 15:9578. [PMID: 40113888 PMCID: PMC11926111 DOI: 10.1038/s41598-025-93700-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2024] [Accepted: 03/10/2025] [Indexed: 03/22/2025] Open
Abstract
Three-dimensional cell culture systems underpin cell-based technologies ranging from tissue scaffolds for regenerative medicine to tumor models and organoids for drug screening. However, to realise the full potential of these technologies requires analytical methods able to capture the diverse information needed to characterize constituent cells, scaffold components and the extracellular milieu. Here we describe a multimodal imaging workflow which combines fluorescence, vibrational and second harmonic generation microscopy with secondary ion mass spectrometry imaging and transmission electron microscopy to analyse the morphological, chemical and ultrastructural properties of cell-seeded scaffolds. Using cell nuclei as landmarks we register fluorescence with label-free optical microscopy images and high mass resolution with high spatial resolution secondary ion mass spectrometry images, with an accuracy comparable to the intrinsic spatial resolution of the techniques. We apply these methods to investigate relationships between cell distribution, cytoskeletal morphology, scaffold fiber organisation and biomolecular composition in type I collagen scaffolds seeded with human dermal fibroblasts.
Collapse
Affiliation(s)
- Camilla Dondi
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | | | - Jean-Luc Vorng
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Gina Greenidge
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Ibolya E Kepiro
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Natalie A Belsey
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
- School of Chemistry and Chemical Engineering, University of Surrey, Guildford, GU2 7XH, UK
| | - Greg McMahon
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Ian S Gilmore
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Maxim G Ryadnov
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Michael Shaw
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK.
- UCL Hawkes Institute and Department of Computer Science, University College London, London, UK.
| |
Collapse
|
2
|
Seydoux C, Ezzedine JA, Larbi GS, Ravanel S, Maréchal E, Barnes JP, Jouneau PH. Subcellular ToF-SIMS Imaging of the Snow Alga Sanguina nivaloides by Combining High Mass and High Lateral Resolution Acquisitions. Anal Chem 2024; 96:19917-19925. [PMID: 39642022 DOI: 10.1021/acs.analchem.4c03826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2024]
Abstract
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging has demonstrated great potential for metabolic imaging; however, achieving sufficiently high lateral and mass resolution to reach the organelle scale remains challenging. To address this, we have developed an approach that combines imaging acquisitions close to the highest lateral resolution (<150 nm) and mass resolution (9,000) reachable by ToF-SIMS. The data were then merged and processed using multivariate analysis (MVA), providing the identification and annotation of 85% of the main contributors to the multivariate analysis components at high lateral resolution. Insights into the electron microscopy sample preparation were provided, especially as we revealed that at least three different osmium-containing complexes can be found depending on the specific chemical environment of organelles. In cells of the snow alga Sanguina nivaloides, living in a natural environment limited in nutrients such as phosphorus (P), we mapped elements and molecules within their subcellular context, allowing for the molecular fingerprinting of organelles at a resolution of ∼150 nm, as confirmed by correlative electron microscopy. It was thus possible to highlight that S. nivaloides likely absorbed selectively some inorganic P forms provided by P-rich dust deposited on the snow surface. S. nivaloides cells could maintain phosphorylations in the stroma of the chloroplast, consistently with the preservation of photosynthetic activity. The presented method can thus overcome the current limitations of ToF-SIMS for subcellular imaging and contributes to the understanding of key questions, such as P homeostasis and other cell physiological processes.
Collapse
Affiliation(s)
- Claire Seydoux
- CEA, IRIG-Laboratoire Modélisation et Exploration des Matériaux, Université Grenoble Alpes, Grenoble 38000, France
| | - Jade A Ezzedine
- CEA, CNRS, INRAE, IRIG-Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, Grenoble 38000, France
| | - Grégory Si Larbi
- CEA, CNRS, INRAE, IRIG-Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, Grenoble 38000, France
| | - Stéphane Ravanel
- CEA, CNRS, INRAE, IRIG-Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, Grenoble 38000, France
| | - Eric Maréchal
- CEA, CNRS, INRAE, IRIG-Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, Grenoble 38000, France
| | | | - Pierre-Henri Jouneau
- CEA, IRIG-Laboratoire Modélisation et Exploration des Matériaux, Université Grenoble Alpes, Grenoble 38000, France
| |
Collapse
|
3
|
Li F, Bahr JN, Bierth FAL, Reshetniak S, Tetzlaff C, Fornasiero EF, Wichmann C, Rizzoli SO. Morphological correlates of synaptic protein turnover in the mouse brain. Life Sci Alliance 2024; 7:e202402793. [PMID: 39134363 PMCID: PMC11325198 DOI: 10.26508/lsa.202402793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 08/05/2024] [Accepted: 08/05/2024] [Indexed: 08/15/2024] Open
Abstract
Synaptic proteins need to be replaced regularly, to maintain function and to prevent damage. It is unclear whether this process, known as protein turnover, relates to synaptic morphology. To test this, we relied on nanoscale secondary ion mass spectrometry, to detect newly synthesized synaptic components in the brains of young adult (6 mo old) and aged mice (24 mo old), and on transmission electron microscopy, to reveal synapse morphology. Several parameters correlated to turnover, including pre- and postsynaptic size, the number of synaptic vesicles and the presence of a postsynaptic nascent zone. In aged mice, the turnover of all brain compartments was reduced by ∼20%. The turnover rates of the pre- and postsynapses correlated well in aged mice, suggesting that they are subject to common regulatory mechanisms. This correlation was poorer in young adult mice, in line with their higher synaptic dynamics. We conclude that synapse turnover is reflected by synaptic morphology.
Collapse
Affiliation(s)
- Fengxia Li
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Julius N Bahr
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Molecular Architecture of Synapses Group, Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
- Göttingen Graduate Center for Neurosciences, Biophysics and Molecular Biosciences (GGNB), University of Göttingen, Göttingen, Germany
| | - Felicitas A-L Bierth
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Molecular Architecture of Synapses Group, Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
- Molecular Medicine Bachelor Programme, University Medical Center Göttingen, Göttingen, Germany
| | - Sofiia Reshetniak
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
| | - Christian Tetzlaff
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
| | - Eugenio F Fornasiero
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
| | - Carolin Wichmann
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Molecular Architecture of Synapses Group, Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
| | - Silvio O Rizzoli
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| |
Collapse
|
4
|
Colley ME, Esselman AB, Scott CF, Spraggins JM. High-Specificity Imaging Mass Spectrometry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2024; 17:1-24. [PMID: 38594938 DOI: 10.1146/annurev-anchem-083023-024546] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Imaging mass spectrometry (IMS) enables highly multiplexed, untargeted tissue mapping for a broad range of molecular classes, facilitating in situ biological discovery. Yet, challenges persist in molecular specificity, which is the ability to discern one molecule from another, and spatial specificity, which is the ability to link untargeted imaging data to specific tissue features. Instrumental developments have dramatically improved IMS spatial resolution, allowing molecular observations to be more readily associated with distinct tissue features across spatial scales, ranging from larger anatomical regions to single cells. High-performance mass analyzers and systems integrating ion mobility technologies are also becoming more prevalent, further improving molecular coverage and the ability to discern chemical identity. This review provides an overview of recent advancements in high-specificity IMS that are providing critical biological context to untargeted molecular imaging, enabling integrated analyses, and addressing advanced biomedical research applications.
Collapse
Affiliation(s)
- Madeline E Colley
- 1Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA;
- 2Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA
| | - Allison B Esselman
- 2Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA
- 3Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
| | - Claire F Scott
- 2Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA
- 4Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Jeffrey M Spraggins
- 1Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA;
- 2Mass Spectrometry Research Center, Vanderbilt University, Nashville, Tennessee, USA
- 3Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
- 4Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
- 5Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| |
Collapse
|
5
|
Gerardi D, Bernardi S, Bruni A, Falisi G, Botticelli G. Characterization and morphological methods for oral biofilm visualization: where are we nowadays? AIMS Microbiol 2024; 10:391-414. [PMID: 38919718 PMCID: PMC11194622 DOI: 10.3934/microbiol.2024020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 05/16/2024] [Accepted: 05/31/2024] [Indexed: 06/27/2024] Open
Abstract
The oral microbiome represents an essential component of the oral ecosystem whose symbiotic relationship contributes to health maintenance. The biofilm represents a state of living of microorganisms surrounding themselves with a complex and tridimensional organized polymeric support and defense matrix. The substrates where the oral biofilm adhere can suffer from damages due to the microbial community metabolisms. Therefore, microbial biofilm represents the main etiological factor of the two pathologies of dental interest with the highest incidence, such as carious pathology and periodontal pathology. The study, analysis, and understanding of the characteristics of the biofilm, starting from the macroscopic structure up to the microscopic architecture, appear essential. This review examined the morphological methods used through the years to identify species, adhesion mechanisms that contribute to biofilm formation and stability, and how the action of microbicidal molecules is effective against pathological biofilm. Microscopy is the primary technique for the morphological characterization of biofilm. Light microscopy, which includes the stereomicroscope and confocal laser microscopy (CLSM), allows the visualization of microbial communities in their natural state, providing valuable information on the spatial arrangement of different microorganisms within the biofilm and revealing microbial diversity in the biofilm matrix. The stereomicroscope provides a three-dimensional view of the sample, allowing detailed observation of the structure, thickness, morphology, and distribution of the various species in the biofilm while CLSM provides information on its three-dimensional architecture, microbial composition, and dynamic development. Electron microscopy, scanning (SEM) or transmission (TEM), allows the high-resolution investigation of the architecture of the biofilm, analyzing the bacterial population, the extracellular polymeric matrix (EPS), and the mechanisms of the physical and chemical forces that contribute to the adhesion of the biofilm to the substrates, on a nanometric scale. More advanced microscopic methodologies, such as scanning transmission electron microscopy (STEM), high-resolution transmission electron microscopy (HR-TEM), and correlative microscopy, have enabled the evaluation of antibacterial treatments, due to the potential to reveal the efficacy of different molecules in breaking down the biofilm. In conclusion, evidence based on scientific literature shows that established microscopic methods represent the most common tools used to characterize biofilm and its morphology in oral microbiology. Further protocols and studies on the application of advanced microscopic techniques are needed to obtain precise details on the microbiological and pathological aspects of oral biofilm.
Collapse
Affiliation(s)
- Davide Gerardi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Sara Bernardi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Angelo Bruni
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Giovanni Falisi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Gianluca Botticelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| |
Collapse
|
6
|
Conn BN, Lieberman JA, Chatman P, Cotton K, Essandoh MA, Ebqa’ai M, Nelson TL, Wozniak KL. Antifungal activity of eumelanin-inspired indoylenepheyleneethynylene against Cryptococcus neoformans. Front Microbiol 2024; 14:1339303. [PMID: 38293553 PMCID: PMC10826398 DOI: 10.3389/fmicb.2023.1339303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 12/19/2023] [Indexed: 02/01/2024] Open
Abstract
Cryptococcus neoformans is an opportunistic fungal pathogen that causes meningitis in >152,000 immunocompromised individuals annually, leading to 112,000 yearly deaths. The four classes of existing antifungal agents target plasma membrane sterols (ergosterol), nucleic acid synthesis, and cell wall synthesis. Existing drugs are not highly effective against Cryptococcus, and antifungal drug resistance is an increasing problem. A novel antimicrobial compound, a eumelanin-inspired indoylenepheyleneethynylene, EIPE-1, was synthesized and has antimicrobial activity against Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MSRA), but not towards Gram-negative organisms. Based on EIPE-1's antibacterial activity, we hypothesized that EIPE-1 could have antifungal activity. For these studies, we tested EIPE-1 against C. neoformans strain H99 and 6 additional cryptococcal clinical isolates. We examined antifungal activity, cytotoxicity, effects on fungal gene expression, and mechanism of action of EIPE-1. Results showed that EIPE-1 has fungicidal effects on seven cryptococcal strains with MICs ranging from 1.56 to 3.125 μg/mL depending on the strain, and it is non-toxic to mammalian cells. We conducted scanning and transmission electron microscopy on the exposed cells to examine structural changes to the organism following EIPE-1 treatment. Cells exposed displayed structural changes to their cell wall and membranes, with internal contents leaking out of the cells. To understand the effect of EIPE-1 on fungal gene expression, RNA sequencing was conducted. Results showed that EIPE-1 affects several processes involved stress response, ergosterol biosynthesis, capsule biosynthesis, and cell wall attachment and remodeling. Therefore, our studies demonstrate that EIPE-1 has antifungal activity against C. neoformans, which affects both cellular structure and gene expression of multiple fungal pathways involved in cell membrane stability and viability.
Collapse
Affiliation(s)
- Brittney N. Conn
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States
| | - Jacob A. Lieberman
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States
| | - Priscilla Chatman
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States
| | - Kaitlyn Cotton
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States
| | - Martha A. Essandoh
- Department of Chemistry, Oklahoma State University, Stillwater, OK, United States
| | - Mohammad Ebqa’ai
- Department of Chemistry, Oklahoma State University, Stillwater, OK, United States
| | - Toby L. Nelson
- Department of Chemistry, Oklahoma State University, Stillwater, OK, United States
| | - Karen L. Wozniak
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States
| |
Collapse
|
7
|
Roudeau S, Carmona A, Ortega R. Multimodal and multiscale correlative elemental imaging: From whole tissues down to organelles. Curr Opin Chem Biol 2023; 76:102372. [PMID: 37487424 DOI: 10.1016/j.cbpa.2023.102372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 05/17/2023] [Accepted: 06/26/2023] [Indexed: 07/26/2023]
Abstract
Chemical elements, especially metals, play very specific roles in the life sciences. The implementation of correlative imaging methods, of elements on the one hand and of molecules or biological structures on the other hand, is the subject of recent developments. The most commonly used spectro-imaging techniques for metals are synchrotron-induced X-ray fluorescence, mass spectrometry and fluorescence imaging of metal molecular sensors. These imaging methods can be correlated with a wide variety of other analytical techniques used for structural imaging (e.g., electron microscopy), small molecule imaging (e.g., molecular mass spectrometry) or protein imaging (e.g., fluorescence microscopy). The resulting correlative imaging is developed at different scales, from biological tissue to the subcellular level. The fields of application are varied, with some major research topics, the role of metals in the aetiology of neurodegenerative diseases and the use of metals for medical imaging or cancer treatment.
Collapse
Affiliation(s)
| | | | - Richard Ortega
- Univ. Bordeaux, CNRS, LP2I, UMR 5797, F-33170 Gradignan, France.
| |
Collapse
|
8
|
Pramanik SK, Sreedharan S, Tiwari R, Dutta S, Kandoth N, Barman S, Aderinto SO, Chattopadhyay S, Das A, Thomas JA. Nanoparticles for super-resolution microscopy: intracellular delivery and molecular targeting. Chem Soc Rev 2022; 51:9882-9916. [PMID: 36420611 DOI: 10.1039/d1cs00605c] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Following an overview of the approaches and techniques used to acheive super-resolution microscopy, this review presents the advantages supplied by nanoparticle based probes for these applications. The various clases of nanoparticles that have been developed toward these goals are then critically described and these discussions are illustrated with a variety of examples from the recent literature.
Collapse
Affiliation(s)
- Sumit Kumar Pramanik
- CSIR - Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India.
| | - Sreejesh Sreedharan
- Human Science Research Centre, University of Derby, Kedleston road, DE22 1GB, UK
| | - Rajeshwari Tiwari
- CSIR - Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India.
| | - Sourav Dutta
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research, Kolkata, West Bengal, India.
| | - Noufal Kandoth
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research, Kolkata, West Bengal, India.
| | - Surajit Barman
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research, Kolkata, West Bengal, India.
| | - Stephen O Aderinto
- Department of Chemistry, University of Sheffield, Western Bank, Sheffield, S3 7HF, UK.
| | - Samit Chattopadhyay
- Department of Biological Sciences, BITS-Pilani, K K Birla Goa Campus, NH 17B, Zuarinagar, Goa 403726, India.
| | - Amitava Das
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research, Kolkata, West Bengal, India.
| | - Jim A Thomas
- Department of Chemistry, University of Sheffield, Western Bank, Sheffield, S3 7HF, UK.
| |
Collapse
|
9
|
Schaible GA, Kohtz AJ, Cliff J, Hatzenpichler R. Correlative SIP-FISH-Raman-SEM-NanoSIMS links identity, morphology, biochemistry, and physiology of environmental microbes. ISME COMMUNICATIONS 2022; 2:52. [PMID: 37938730 PMCID: PMC9723565 DOI: 10.1038/s43705-022-00134-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/23/2022] [Accepted: 06/09/2022] [Indexed: 05/08/2023]
Abstract
Microscopic and spectroscopic techniques are commonly applied to study microbial cells but are typically used on separate samples, resulting in population-level datasets that are integrated across different cells with little spatial resolution. To address this shortcoming, we developed a workflow that correlates several microscopic and spectroscopic techniques to generate an in-depth analysis of individual cells. By combining stable isotope probing (SIP), fluorescence in situ hybridization (FISH), scanning electron microscopy (SEM), confocal Raman microspectroscopy (Raman), and nano-scale secondary ion mass spectrometry (NanoSIMS), we illustrate how individual cells can be thoroughly interrogated to obtain information about their taxonomic identity, structure, physiology, and metabolic activity. Analysis of an artificial microbial community demonstrated that our correlative approach was able to resolve the activity of single cells using heavy water SIP in conjunction with Raman and/or NanoSIMS and establish their taxonomy and morphology using FISH and SEM. This workflow was then applied to a sample of yet uncultured multicellular magnetotactic bacteria (MMB). In addition to establishing their identity and activity, backscatter electron microscopy (BSE), NanoSIMS, and energy-dispersive X-ray spectroscopy (EDS) were employed to characterize the magnetosomes within the cells. By integrating these techniques, we demonstrate a cohesive approach to thoroughly study environmental microbes on a single-cell level.
Collapse
Affiliation(s)
- George A Schaible
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, 59717, USA
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
- Thermal Biology Institute, Montana State University, Bozeman, MT, 59717, USA
| | - Anthony J Kohtz
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, 59717, USA
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
- Thermal Biology Institute, Montana State University, Bozeman, MT, 59717, USA
| | - John Cliff
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Roland Hatzenpichler
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, 59717, USA.
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA.
- Thermal Biology Institute, Montana State University, Bozeman, MT, 59717, USA.
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, 59717, USA.
| |
Collapse
|
10
|
Kabatas Glowacki S, Agüi-Gonzalez P, Sograte-Idrissi S, Jähne S, Opazo F, Phan NTN, Rizzoli SO. An iodine-containing probe as a tool for molecular detection in secondary ion mass spectrometry. Chem Commun (Camb) 2022; 58:7558-7561. [PMID: 35708485 DOI: 10.1039/d2cc02290g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed here an iodine-containing probe that can be used to identify the molecules of interest in secondary ion mass spectrometry (SIMS) by simple immunolabelling procedures. The immunolabelled iodine probe was readily combined with previously-developed SIMS probes carrying fluorine, to generate dual-channel SIMS data. This probe should provide a useful complement to the currently available SIMS probes, thus expanding the scope of this technology.
Collapse
Affiliation(s)
- Selda Kabatas Glowacki
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany. .,Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| | - Paola Agüi-Gonzalez
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany. .,Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| | - Shama Sograte-Idrissi
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany. .,Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| | - Sebastian Jähne
- Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| | - Felipe Opazo
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany.
| | - Nhu T N Phan
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany. .,Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| | - Silvio O Rizzoli
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Von-Siebold-Straße 3a, 37075 Göttingen, Germany. .,Department of Neuro and Sensory Physiology, University Medical Center, Göttingen, Humboldtalee 23, 37073 Göttingen, Germany
| |
Collapse
|
11
|
Lork AA, Vo KLL, Phan NTN. Chemical Imaging and Analysis of Single Nerve Cells by Secondary Ion Mass Spectrometry Imaging and Cellular Electrochemistry. Front Synaptic Neurosci 2022; 14:854957. [PMID: 35651734 PMCID: PMC9149580 DOI: 10.3389/fnsyn.2022.854957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
A nerve cell is a unit of neuronal communication in the nervous system and is a heterogeneous molecular structure, which is highly mediated to accommodate cellular functions. Understanding the complex regulatory mechanisms of neural communication at the single cell level requires analytical techniques with high sensitivity, specificity, and spatial resolution. Challenging technologies for chemical imaging and analysis of nerve cells will be described in this review. Secondary ion mass spectrometry (SIMS) allows for non-targeted and targeted molecular imaging of nerve cells and synapses at subcellular resolution. Cellular electrochemistry is well-suited for quantifying the amount of reactive chemicals released from living nerve cells. These techniques will also be discussed regarding multimodal imaging approaches that have recently been shown to be advantageous for the understanding of structural and functional relationships in the nervous system. This review aims to provide an insight into the strengths, limitations, and potentials of these technologies for synaptic and neuronal analyses.
Collapse
Affiliation(s)
| | | | - Nhu T. N. Phan
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
12
|
A Reliable Approach for Revealing Molecular Targets in Secondary Ion Mass Spectrometry. Int J Mol Sci 2022; 23:ijms23094615. [PMID: 35563005 PMCID: PMC9103194 DOI: 10.3390/ijms23094615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 12/10/2022] Open
Abstract
Nano secondary ion mass spectrometry (nanoSIMS) imaging is a rapidly growing field in biological sciences, which enables investigators to describe the chemical composition of cells and tissues with high resolution. One of the major challenges of nanoSIMS is to identify specific molecules or organelles, as these are not immediately recognizable in nanoSIMS and need to be revealed by SIMS-compatible probes. Few laboratories have generated such probes, and none are commercially available. To address this, we performed a systematic study of probes initially developed for electron microscopy. Relying on nanoscale SIMS, we found that antibodies coupled to 6 nm gold particles are surprisingly efficient in terms of labeling specificity while offering a reliable detection threshold. These tools enabled accurate visualization and sample analysis and were easily employed in correlating SIMS with other imaging approaches, such as fluorescence microscopy. We conclude that antibodies conjugated to moderately sized gold particles are promising tools for SIMS imaging.
Collapse
|
13
|
Vermeulen I, Isin EM, Barton P, Cillero-Pastor B, Heeren RM. Multimodal molecular imaging in drug discovery and development. Drug Discov Today 2022; 27:2086-2099. [DOI: 10.1016/j.drudis.2022.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/03/2022] [Accepted: 04/08/2022] [Indexed: 02/06/2023]
|