1
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Rabinowitz J, Hartel AJW, Dayton H, Fabbri JD, Jo J, Dietrich LEP, Shepard KL. Charge Mapping of Pseudomonas aeruginosa Using a Hopping Mode Scanning Ion Conductance Microscopy Technique. Anal Chem 2023; 95:5285-5292. [PMID: 36920847 PMCID: PMC10359948 DOI: 10.1021/acs.analchem.2c05303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Scanning ion conductance microscopy (SICM) is a topographic imaging technique capable of probing biological samples in electrolyte conditions. SICM enhancements have enabled surface charge detection based on voltage-dependent signals. Here, we show how the hopping mode SICM method (HP-SICM) can be used for rapid and minimally invasive surface charge mapping. We validate our method usingPseudomonas aeruginosaPA14 (PA) cells and observe a surface charge density of σPA = -2.0 ± 0.45 mC/m2 that is homogeneous within the ∼80 nm lateral scan resolution. This biological surface charge is detected from at least 1.7 μm above the membrane (395× the Debye length), and the long-range charge detection is attributed to electroosmotic amplification. We show that imaging with a nanobubble-plugged probe reduces perturbation of the underlying sample. We extend the technique to PA biofilms and observe a charge density exceeding -20 mC/m2. We use a solid-state calibration to quantify surface charge density and show that HP-SICM cannot be quantitatively described by a steady-state finite element model. This work contributes to the body of scanning probe methods that can uniquely contribute to microbiology and cellular biology.
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Affiliation(s)
- Jake Rabinowitz
- Department of Electrical Engineering, Columbia University, New York, New York 10027, United States
| | - Andreas J W Hartel
- Department of Electrical Engineering, Columbia University, New York, New York 10027, United States.,Department of Biology, Columbia University, New York, New York 10027, United States
| | - Hannah Dayton
- Department of Biology, Columbia University, New York, New York 10027, United States
| | - Jason D Fabbri
- Department of Electrical Engineering, Columbia University, New York, New York 10027, United States
| | - Jeanyoung Jo
- Department of Biology, Columbia University, New York, New York 10027, United States
| | - Lars E P Dietrich
- Department of Biology, Columbia University, New York, New York 10027, United States
| | - Kenneth L Shepard
- Department of Electrical Engineering, Columbia University, New York, New York 10027, United States
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2
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Nozawa K, Zhang X, Nakamura T, Nashimoto Y, Takahashi Y, Ino K, Shiku H. Topographical evaluation of human mesenchymal stem cells during osteogenic differentiation using scanning ion conductance microscopy. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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3
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Nashimoto Y, Abe M, Fujii R, Taira N, Ida H, Takahashi Y, Ino K, Ramon‐Azcon J, Shiku H. Topography and Permeability Analyses of Vasculature-on-a-Chip Using Scanning Probe Microscopies. Adv Healthc Mater 2021; 10:e2101186. [PMID: 34409770 DOI: 10.1002/adhm.202101186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/22/2021] [Indexed: 11/08/2022]
Abstract
Microphysiological systems (MPS) or organs-on-chips (OoC) can emulate the physiological functions of organs in vitro and are effective tools for determining human drug responses in preclinical studies. However, the analysis of MPS has relied heavily on optical tools, resulting in difficulties in real-time and high spatial resolution imaging of the target cell functions. In this study, the role of scanning probe microscopy (SPM) as an analytical tool for MPS is evaluated. An access hole is made in a typical MPS system with stacked microchannels to insert SPM probes into the system. For the first study, a simple vascular model composed of only endothelial cells is prepared for SPM analysis. Changes in permeability and local chemical flux are quantitatively evaluated during the construction of the vascular system. The morphological changes in the endothelial cells after flow stimulation are imaged at the single-cell level for topographical analysis. Finally, the possibility of adapting the permeability and topographical analysis using SPM for the intestinal vascular system is further evaluated. It is believed that this study will pave the way for an in situ permeability assay and structural analysis of MPS using SPM.
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Affiliation(s)
- Yuji Nashimoto
- Frontier Research Institute for Interdisciplinary Sciences (FRIS) Tohoku University Miyagi 980‐8578 Japan
- Graduate School of Engineering Tohoku University Miyagi 980‐8579 Japan
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
| | - Minori Abe
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
| | - Ryota Fujii
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
| | - Noriko Taira
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
| | - Hiroki Ida
- Frontier Research Institute for Interdisciplinary Sciences (FRIS) Tohoku University Miyagi 980‐8578 Japan
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
- WPI‐Advanced Institute for Materials Research Tohoku University Miyagi 980‐8577 Japan
- Precursory Research for Embryonic Science and Technology (PRESTO) Science and Technology Agency (JST) Saitama 332‐0012 Japan
| | - Yasufumi Takahashi
- Precursory Research for Embryonic Science and Technology (PRESTO) Science and Technology Agency (JST) Saitama 332‐0012 Japan
- WPI‐Nano Life Science Institute Kanazawa University Ishikawa 920‐1192 Japan
| | - Kosuke Ino
- Graduate School of Engineering Tohoku University Miyagi 980‐8579 Japan
| | - Javier Ramon‐Azcon
- Institute for Bioengineering of Catalonia (IBEC) The Barcelona Institute of Science and Technology Barcelona 08028 Spain
- Institució Catalana de Reserca I Estudis Avançats (ICREA) Passeig de Lluís Companys, 23 Barcelona E08010 Spain
| | - Hitoshi Shiku
- Graduate School of Engineering Tohoku University Miyagi 980‐8579 Japan
- Graduate School of Environmental Studies Tohoku University Miyagi 980‐8579 Japan
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4
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Ida H, Takahashi Y, Kumatani A, Shiku H, Murayama T, Hirose H, Futaki S, Matsue T. Nanoscale Visualization of Morphological Alteration of Live-Cell Membranes by the Interaction with Oligoarginine Cell-Penetrating Peptides. Anal Chem 2021; 93:5383-5393. [PMID: 33769789 DOI: 10.1021/acs.analchem.0c04097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The interactions between the cell membrane and biomolecules remain poorly understood. For example, arginine-rich cell-penetrating peptides (CPPs), including octaarginines (R8), are internalized by interactions with cell membranes. However, during the internalization process, the exact membrane dynamics introduced by these CPPs are still unknown. Here, we visualize arginine-rich CPPs and cell-membrane interaction-induced morphological changes using a system that combines scanning ion-conductance microscopy and spinning-disk confocal microscopy, using fluorescently labeled R8. This system allows time-dependent, nanoscale visualization of structural dynamics in live-cell membranes. Various types of membrane remodeling caused by arginine-rich CPPs are thus observed. The induction of membrane ruffling and the cup closure are observed as a process of endocytic uptake of the peptide. Alternatively suggested is the concave structural formation accompanied by direct peptide translocation through cell membranes. Studies using R8 without fluorescent labeling also demonstrate a non-negligible effect of the fluorescent moiety on membrane structural alteration.
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Affiliation(s)
- Hiroki Ida
- The Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi 980-8578, Japan.,Precursory Research for Embryonic Science and Technology, Science and Technology Agency (JST), Saitama 332-0012, Japan.,Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan.,Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Yasufumi Takahashi
- Precursory Research for Embryonic Science and Technology, Science and Technology Agency (JST), Saitama 332-0012, Japan.,WPI Nano Life Science Institute (WPI NanoLSI), Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Akichika Kumatani
- Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan.,Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan.,International Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.,Center for Science and Innovation in Spintronics (CSIS), Tohoku University, Sendai, Miyagi 980-8577 Japan
| | - Hitoshi Shiku
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Tomo Murayama
- Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
| | - Hisaaki Hirose
- Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
| | - Shiroh Futaki
- Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
| | - Tomokazu Matsue
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8579, Japan
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5
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Chen B, Perry D, Page A, Kang M, Unwin PR. Scanning Ion Conductance Microscopy: Quantitative Nanopipette Delivery-Substrate Electrode Collection Measurements and Mapping. Anal Chem 2019; 91:2516-2524. [PMID: 30608117 DOI: 10.1021/acs.analchem.8b05449] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Scanning ion conductance microscopy (SICM) is becoming a powerful multifunctional tool for probing and analyzing surfaces and interfaces. This work outlines methodology for the quantitative controlled delivery of ionic redox-active molecules from a nanopipette to a substrate electrode, with a high degree of spatial and temporal precision. Through control of the SICM bias applied between a quasi-reference counter electrode (QRCE) in the SICM nanopipette probe and a similar electrode in bulk solution, it is shown that ionic redox species can be held inside the nanopipette, and then pulse-delivered to a defined region of a substrate positioned beneath the nanopipette. A self-referencing hopping mode imaging protocol is implemented, where reagent is released in bulk solution (reference measurement) and near the substrate surface at each pixel in an image, with the tip and substrate currents measured throughout. Analysis of the tip and substrate current data provides an improved understanding of mass transport and nanoscale delivery in SICM and a new means of synchronously mapping electrode reactivity, surface topography, and charge. Experiments on Ru(NH3)63+ reduction to Ru(NH3)62+ and dopamine oxidation in aqueous solution at a carbon fiber ultramicroelectrode (UME), used as the substrate, illustrate these aspects. Finite element method (FEM) modeling provides quantitative understanding of molecular delivery in SICM. The approach outlined constitutes a new methodology for electrode mapping and provides improved insights on the use of SICM for controlled delivery to interfaces generally.
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6
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Takahashi Y, Ida H, Matsumae Y, Komaki H, Zhou Y, Kumatani A, Kanzaki M, Shiku H, Matsue T. 3D electrochemical and ion current imaging using scanning electrochemical-scanning ion conductance microscopy. Phys Chem Chem Phys 2018; 19:26728-26733. [PMID: 28951914 DOI: 10.1039/c7cp05157c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Local cell-membrane permeability and ionic strength are important factors for maintaining the functions of cells. Here, we measured the spatial electrochemical and ion concentration profile near the sample surface with nanoscale resolution using scanning electrochemical microscopy (SECM) combined with scanning ion-conductance microscopy (SICM). The ion current feedback system is an effective way to control probe-sample distance without contact and monitor the kinetic effect of mediator regeneration and the chemical concentration profile. For demonstrating 3D electrochemical and ion concentration mapping, we evaluated the reaction rate of electrochemical mediator regeneration on an unbiased conductor and visualized inhomogeneous permeability and the ion concentration 3D profile on a single fixed adipocyte cell surface.
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Affiliation(s)
- Yasufumi Takahashi
- WPI-Advanced Institute for Materials Research, Tohoku University, 980-8577, Japan.
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7
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Zhou Y, Saito M, Miyamoto T, Novak P, Shevchuk AI, Korchev YE, Fukuma T, Takahashi Y. Nanoscale Imaging of Primary Cilia with Scanning Ion Conductance Microscopy. Anal Chem 2018; 90:2891-2895. [DOI: 10.1021/acs.analchem.7b05112] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yuanshu Zhou
- Division
of Electrical Engineering and Computer Science, Kanazawa University, Kanazawa 920-1192, Japan
| | - Masaki Saito
- Department
of Molecular Pharmacology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Takafumi Miyamoto
- Division
of Electrical Engineering and Computer Science, Kanazawa University, Kanazawa 920-1192, Japan
| | - Pavel Novak
- School
of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Andrew I Shevchuk
- Department
of Medicine, Imperial College London, London W12 0NN, United Kingdom
| | - Yuri E Korchev
- Department
of Medicine, Imperial College London, London W12 0NN, United Kingdom
| | - Takeshi Fukuma
- Division
of Electrical Engineering and Computer Science, Kanazawa University, Kanazawa 920-1192, Japan
- WPI
Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa 920-1192, Japan
| | - Yasufumi Takahashi
- Division
of Electrical Engineering and Computer Science, Kanazawa University, Kanazawa 920-1192, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
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8
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Perry D, Page A, Chen B, Frenguelli BG, Unwin PR. Differential-Concentration Scanning Ion Conductance Microscopy. Anal Chem 2017; 89:12458-12465. [DOI: 10.1021/acs.analchem.7b03543] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- David Perry
- Department
of Chemistry, ‡MOAC Doctoral Training Centre, §School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Ashley Page
- Department
of Chemistry, ‡MOAC Doctoral Training Centre, §School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Baoping Chen
- Department
of Chemistry, ‡MOAC Doctoral Training Centre, §School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Bruno G. Frenguelli
- Department
of Chemistry, ‡MOAC Doctoral Training Centre, §School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Department
of Chemistry, ‡MOAC Doctoral Training Centre, §School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
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9
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Measurement of ion fluxes across epithelia. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2017; 127:1-11. [DOI: 10.1016/j.pbiomolbio.2017.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 03/13/2017] [Accepted: 03/18/2017] [Indexed: 12/23/2022]
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10
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Ida H, Takahashi Y, Kumatani A, Shiku H, Matsue T. High Speed Scanning Ion Conductance Microscopy for Quantitative Analysis of Nanoscale Dynamics of Microvilli. Anal Chem 2017; 89:6015-6020. [DOI: 10.1021/acs.analchem.7b00584] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Hiroki Ida
- Graduate
School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Yasufumi Takahashi
- Division
of Electrical Engineering and Computer Science, Kakuma-machi, Kanazawa University, Kanazawa 920-1192, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Akichika Kumatani
- Graduate
School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
- Advanced
Institute for Material Research (AIMR), Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Hitoshi Shiku
- Department
of Applied Chemistry, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Tomokazu Matsue
- Graduate
School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
- Advanced
Institute for Material Research (AIMR), Tohoku University, Sendai, Miyagi 980-8576, Japan
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11
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MATSUOKA R, AOYAGI S, MATSUMOTO N, MATSUDAIRA M, TAKAHASHI Y, KUMATANI A, IDA H, MUNAKATA H, IIDA K, SHIKU H, KANAMURA K, MATSUE T. Advanced Scanning Electrochemical Microscope System for High-Resolution imaging and Electrochemical Applications. ELECTROCHEMISTRY 2017. [DOI: 10.5796/electrochemistry.85.319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | | | | | | | - Yasufumi TAKAHASHI
- Division of Electrical and Computer Engineering, Kanazawa University
- PRESTO, JST
| | - Akichika KUMATANI
- Graduate School of Environmental Stadies, Tohoku University
- WPI-Advanced Institute for Materials Research, Tohoku University
| | - Hiroki IDA
- Graduate School of Environmental Stadies, Tohoku University
| | - Hirokazu MUNAKATA
- Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | | | | | - Kiyoshi KANAMURA
- Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Tomokazu MATSUE
- Graduate School of Environmental Stadies, Tohoku University
- WPI-Advanced Institute for Materials Research, Tohoku University
- Graduate School of Engineering, Tohoku University
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12
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Affiliation(s)
- David Perry
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Dmitry Momotenko
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Robert A. Lazenby
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Minkyung Kang
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Department of Chemistry and ‡MOAC Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
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13
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Perry D, Paulose Nadappuram B, Momotenko D, Voyias PD, Page A, Tripathi G, Frenguelli BG, Unwin PR. Surface Charge Visualization at Viable Living Cells. J Am Chem Soc 2016; 138:3152-60. [DOI: 10.1021/jacs.5b13153] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- David Perry
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Binoy Paulose Nadappuram
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Dmitry Momotenko
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Philip D. Voyias
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Ashley Page
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Gyanendra Tripathi
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Bruno G. Frenguelli
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Department of Chemistry, ‡MOAC Doctoral Training Centre, §Division of Metabolic and Vascular
Health, Warwick Medical School, and ∥School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
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14
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TAKAHASHI Y. Development of High-Resolution Scanning Electrochemical Microscopy for Nanoscale Topography and Electrochemical Simultaneous Imaging. ELECTROCHEMISTRY 2016. [DOI: 10.5796/electrochemistry.84.662] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yasufumi TAKAHASHI
- Division of Electrical Engineering and Computer Science, Kanazawa University
- PRESTO, JST
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15
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Seifert J, Rheinlaender J, Novak P, Korchev YE, Schäffer TE. Comparison of Atomic Force Microscopy and Scanning Ion Conductance Microscopy for Live Cell Imaging. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6807-13. [PMID: 26011471 DOI: 10.1021/acs.langmuir.5b01124] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Atomic force microscopy (AFM) and scanning ion conductance microscopy (SICM) are excellent and commonly used techniques for imaging the topography of living cells with high resolution. We present a direct comparison of AFM and SICM for imaging microvilli, which are small features on the surface of living cells, and for imaging the shape of whole cells. The imaging quality on microvilli increased significantly after cell fixation for AFM, whereas for SICM it remained constant. The apparent shape of whole cells in the case of AFM depended on the imaging force, which deformed the cell. In the case of SICM, cell deformations were avoided, owing to the contact-free imaging mechanism. We estimated that the lateral resolution on living cells is limited by the cell's elastic modulus for AFM, while it is not for SICM. By long-term, time-lapse imaging of microvilli dynamics, we showed that the imaging quality decreased with time for AFM, while it remained constant for SICM.
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Affiliation(s)
- Jan Seifert
- †Institute of Applied Physics, University of Tübingen, Tübingen, Germany
| | | | - Pavel Novak
- ‡Division of Medicine, Imperial College London, London, U.K
- §School of Engineering and Materials Science, Queen Mary University of London, London, U.K
| | - Yuri E Korchev
- ‡Division of Medicine, Imperial College London, London, U.K
| | - Tilman E Schäffer
- †Institute of Applied Physics, University of Tübingen, Tübingen, Germany
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16
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Nashimoto Y, Takahashi Y, Ida H, Matsumae Y, Ino K, Shiku H, Matsue T. Nanoscale Imaging of an Unlabeled Secretory Protein in Living Cells Using Scanning Ion Conductance Microscopy. Anal Chem 2015; 87:2542-5. [DOI: 10.1021/ac5046388] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yuji Nashimoto
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Yasufumi Takahashi
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8576, Japan
- PRESTO, JST, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroki Ida
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Yoshiharu Matsumae
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Kosuke Ino
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Hitoshi Shiku
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
| | - Tomokazu Matsue
- Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi 980-8576, Japan
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8576, Japan
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