1
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Ramos S, Lee JC. Raman spectroscopy in the study of amyloid formation and phase separation. Biochem Soc Trans 2024; 52:1121-1130. [PMID: 38666616 DOI: 10.1042/bst20230599] [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: 02/14/2024] [Revised: 04/11/2024] [Accepted: 04/15/2024] [Indexed: 06/27/2024]
Abstract
Neurodegenerative diseases, such as Alzheimer's and Parkinson's, share a common pathological feature of amyloid structure accumulation. However, the structure-function relationship between these well-ordered, β-sheet-rich, filamentous protein deposits and disease etiology remains to be defined. Recently, an emerging hypothesis has linked phase separation, a process involved in the formation of protein condensates, to amyloid formation, suggesting that liquid protein droplets serve as loci for amyloid initiation. To elucidate how these processes contribute to disease progression, tools that can directly report on protein secondary structural changes are needed. Here, we review recent studies that have demonstrated Raman spectroscopy as a powerful vibrational technique for interrogating amyloid structures; one that offers sensitivity from the global secondary structural level to specific residues. This probe-free technique is further enhanced via coupling to a microscope, which affords structural data with spatial resolution, known as Raman spectral imaging (RSI). In vitro and in cellulo applications of RSI are discussed, highlighting studies of protein droplet aging, cellular internalization of fibrils, and Raman imaging of intracellular water. Collectively, utilization of the myriad Raman spectroscopic methods will contribute to a deeper understanding of protein conformational dynamics in the complex cellular milieu and offer potential clinical diagnostic capabilities for protein misfolding and aggregation processes in disease states.
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Affiliation(s)
- Sashary Ramos
- Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, U.S.A
| | - Jennifer C Lee
- Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, U.S.A
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2
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Hou G, Dong Z, Qin Y, Zhang Z, Liu M, Xia Y. Imaging and component analysis of pumpkin stem tissue with simultaneous SF-CARS and TPEF microscopy. BIOMEDICAL OPTICS EXPRESS 2023; 14:4862-4874. [PMID: 37791252 PMCID: PMC10545196 DOI: 10.1364/boe.497260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/23/2023] [Accepted: 08/16/2023] [Indexed: 10/05/2023]
Abstract
A multimodal nonlinear optical imaging platform based on a single femtosecond oscillator is built for simultaneous TPEF and SF-CARS imaging. TPEF microscopy and SF-CARS microscopy is utilized for mapping the distribution of the lignin component and the polysaccharide component, respectively. Visualization of vessel structure is realized. And the relative distribution of lignin and polysaccharide of vessel structure is mapped. Two pumpkin stem tissue areas with different degrees of lignification are observed with simultaneous TPEF and SF-CARS imaging, and two types of cell walls are identified. The different distribution patterns of lignin and polysaccharide in these two types of cell walls, induced by different degrees of lignification, are analyzed in detail.
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Affiliation(s)
- Guozhong Hou
- Harbin Institute of Technology, National Key Laboratory of Science and Technology on Tunable Laser, Harbin, 150080, China
- Hebei University of Technology, Center for Advanced Laser Technology, Tianjin, 300401, China
| | - Zhiwei Dong
- Harbin Institute of Technology, National Key Laboratory of Science and Technology on Tunable Laser, Harbin, 150080, China
| | - Yifan Qin
- Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin, 150001, China
| | - Ze Zhang
- Hebei University of Technology, Center for Advanced Laser Technology, Tianjin, 300401, China
| | - Meng Liu
- Hebei University of Technology, School of Science, Tianjin, 300401, China
| | - Yuanqin Xia
- Harbin Institute of Technology, National Key Laboratory of Science and Technology on Tunable Laser, Harbin, 150080, China
- Hebei University of Technology, Center for Advanced Laser Technology, Tianjin, 300401, China
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3
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Shinotsuka T, Miyazawa T, Karasawa K, Ozeki Y, Yasui M, Nuriya M. Stimulated Raman scattering microscopy reveals a unique and steady nature of brain water dynamics. CELL REPORTS METHODS 2023; 3:100519. [PMID: 37533646 PMCID: PMC10391342 DOI: 10.1016/j.crmeth.2023.100519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/26/2023] [Accepted: 06/07/2023] [Indexed: 08/04/2023]
Abstract
The biological activities of substances in the brain are shaped by their spatiotemporal dynamics in brain tissues, all of which are regulated by water dynamics. In contrast to solute dynamics, water dynamics have been poorly characterized, owing to the lack of appropriate analytical tools. To overcome this limitation, we apply stimulated Raman scattering multimodal multiphoton microscopy to live brain tissues. The microscopy system allows for the visualization of deuterated water, fluorescence-labeled solutes, and cellular structures at high spatiotemporal resolution, revealing that water moves faster than fluorescent molecules in brain tissues. Detailed analyses demonstrate that water, unlike solutes, diffuses homogeneously in brain tissues without differences between the intra- and the extracellular routes. Furthermore, we find that the water dynamics are steady during development and ischemia, when diffusions of solutes are severely affected. Thus, our approach reveals routes and uniquely robust properties of water diffusion in brain tissues.
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Affiliation(s)
- Takanori Shinotsuka
- Department of Pharmacology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan
| | - Tsuyoshi Miyazawa
- Department of Pharmacology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan
| | - Keiko Karasawa
- Department of Pharmacology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan
| | - Yasuyuki Ozeki
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo 113-8656, Japan
| | - Masato Yasui
- Department of Pharmacology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan
| | - Mutsuo Nuriya
- Department of Pharmacology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan
- Graduate School of Environment and Information Sciences, Yokohama National University, 79-1 Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8501, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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4
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Boildieu D, Guerenne-Del Ben T, Duponchel L, Sol V, Petit JM, Champion É, Kano H, Helbert D, Magnaudeix A, Leproux P, Carré P. Coherent anti-Stokes Raman scattering cell imaging and segmentation with unsupervised data analysis. Front Cell Dev Biol 2022; 10:933897. [PMID: 36051442 PMCID: PMC9424763 DOI: 10.3389/fcell.2022.933897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/11/2022] [Indexed: 11/17/2022] Open
Abstract
Coherent Raman imaging has been extensively applied to live-cell imaging in the last 2 decades, allowing to probe the intracellular lipid, protein, nucleic acid, and water content with a high-acquisition rate and sensitivity. In this context, multiplex coherent anti-Stokes Raman scattering (MCARS) microspectroscopy using sub-nanosecond laser pulses is now recognized as a mature and straightforward technology for label-free bioimaging, offering the high spectral resolution of conventional Raman spectroscopy with reduced acquisition time. Here, we introduce the combination of the MCARS imaging technique with unsupervised data analysis based on multivariate curve resolution (MCR). The MCR process is implemented under the classical signal non-negativity constraint and, even more originally, under a new spatial constraint based on cell segmentation. We thus introduce a new methodology for hyperspectral cell imaging and segmentation, based on a simple, unsupervised workflow without any spectrum-to-spectrum phase retrieval computation. We first assess the robustness of our approach by considering cells of different types, namely, from the human HEK293 and murine C2C12 lines. To evaluate its applicability over a broader range, we then study HEK293 cells in different physiological states and experimental situations. Specifically, we compare an interphasic cell with a mitotic (prophase) one. We also present a comparison between a fixed cell and a living cell, in order to visualize the potential changes induced by the fixation protocol in cellular architecture. Next, with the aim of assessing more precisely the sensitivity of our approach, we study HEK293 living cells overexpressing tropomyosin-related kinase B (TrkB), a cancer-related membrane receptor, depending on the presence of its ligand, brain-derived neurotrophic factor (BDNF). Finally, the segmentation capability of the approach is evaluated in the case of a single cell and also by considering cell clusters of various sizes.
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Affiliation(s)
- Damien Boildieu
- University of Limoges, CNRS, XLIM, UMR 7252, Limoges, France
- University of Poitiers, CNRS, XLIM, UMR 7252, Poitiers, France
| | | | - Ludovic Duponchel
- University of Lille, CNRS, UMR 8516, LASIRE - Laboratoire de Spectroscopie Pour Les Interactions, La Réactivité et L’Environnement, Lille, France
| | - Vincent Sol
- University of Limoges, PEIRENE, UR 22722, Limoges, France
| | | | - Éric Champion
- University of Limoges, CNRS, Institut de Recherche sur Les Céramiques, UMR 7315, Limoges, France
| | - Hideaki Kano
- Department of Chemistry, Faculty of Science, Kyushu University, Fukuoka, Japan
| | - David Helbert
- University of Poitiers, CNRS, XLIM, UMR 7252, Poitiers, France
| | - Amandine Magnaudeix
- University of Limoges, CNRS, Institut de Recherche sur Les Céramiques, UMR 7315, Limoges, France
| | - Philippe Leproux
- University of Limoges, CNRS, XLIM, UMR 7252, Limoges, France
- *Correspondence: Philippe Leproux,
| | - Philippe Carré
- University of Poitiers, CNRS, XLIM, UMR 7252, Poitiers, France
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5
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Choi DS, Lim S, Park JS, Kim CH, Rhee H, Cho M. Label-Free Live-Cell Imaging of Internalized Microplastics and Cytoplasmic Organelles with Multicolor CARS Microscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3045-3055. [PMID: 35133146 DOI: 10.1021/acs.est.1c06255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As the bioaccumulation of microplastics (MPs) is considered as a potential health risk, many efforts have been made to understand the cellular dynamics and cytotoxicity of MPs. Here, we demonstrate that label-free multicolor coherent anti-Stokes Raman scattering (CARS) microscopy enables separate vibrational imaging of internalized MPs and lipid droplets (LDs) with indistinguishable shapes and sizes in live cells. By simultaneously obtaining polystyrene (PS)- and lipid-specific CARS images at two very different frequencies, 1000 and 2850 cm-1, respectively, we successfully identify the local distribution of ingested PS beads and native LDs in Caenorhabditis elegans. We further show that the movements of PS beads and LDs in live cells can be separately tracked in real time, which allows us to characterize their individual intracellular dynamics. We thus anticipate that our multicolor CARS imaging method could be of great use to investigate the cellular transport and cytotoxicity of MPs without additional efforts for pre-labeling to MPs.
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Affiliation(s)
- Dae Sik Choi
- Technology Human Resource Support for SMEs Center, Korea Institute of Industrial Technology (KITECH), Cheonan 31056, Republic of Korea
- R&D Center, Uniotech, Daejeon 34013, Republic of Korea
| | - Sohee Lim
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Jin-Sung Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
| | - Chang-Ho Kim
- Department of Chemistry and Institute of Biological Interfaces, Sogang University, Seoul 04107, Republic of Korea
| | - Hanju Rhee
- Seoul Center, Korea Basic Science Institute, Seoul 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
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6
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Mizuguchi T, Nuriya M. Applications of second harmonic generation (SHG)/sum-frequency generation (SFG) imaging for biophysical characterization of the plasma membrane. Biophys Rev 2020; 12:10.1007/s12551-020-00768-4. [PMID: 33108561 PMCID: PMC7755958 DOI: 10.1007/s12551-020-00768-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 10/20/2020] [Indexed: 12/12/2022] Open
Abstract
The plasma membrane is a lipid bilayer of < 10 nm width that separates intra- and extra-cellular environments and serves as the site of cell-cell communication, as well as communication between cells and the extracellular environment. As such, biophysical phenomena at and around the plasma membrane play key roles in determining cellular physiology and pathophysiology. Thus, the selective visualization and characterization of the plasma membrane are crucial aspects of research in wide areas of biology and medicine. However, the specific characterization of the plasma membrane has been a challenge using conventional imaging techniques, which are unable to effectively distinguish between signals arising from the plasma membrane and those from intracellular lipid structures. In this regard, interface-specific second harmonic generation (SHG) and sum-frequency generation (SFG) imaging demonstrate great potential. When combined with exogenous SHG/SFG active dyes, SHG/SFG can specifically highlight the plasma membrane as the most prominent interface associated with cells. Furthermore, SHG/SFG imaging can be readily extended to multimodal multiphoton microscopy with simultaneous occurrence of other multiphoton phenomena, including multiphoton excitation and coherent Raman scattering, which shed light on the biophysical properties of the plasma membrane from different perspectives. Here, we review traditional and current applications, as well as the prospects of long-known but unexplored SHG/SFG imaging techniques in biophysics, with special focus on their use in the biophysical characterization of the plasma membrane.
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Affiliation(s)
- Takaha Mizuguchi
- Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Mutsuo Nuriya
- Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan.
- Keio Advanced Research Center for Water Biology and Medicine, Keio University, 2-15-45 Mita, Minato-ku, Tokyo, 108-8345, Japan.
- Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama, Kanagawa, 240-8501, Japan.
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7
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Figueroa B, Hu R, Rayner SG, Zheng Y, Fu D. Real-Time Microscale Temperature Imaging by Stimulated Raman Scattering. J Phys Chem Lett 2020; 11:7083-7089. [PMID: 32786960 DOI: 10.1021/acs.jpclett.0c02029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Microscale thermometry of aqueous solutions is essential to understand the dynamics of local heat generation and dissipation in chemical and biological systems. A wide variety of fluorescent probes have been developed to map temperature changes with submicrometer resolution, but they often suffer from the uncertainty associated with microenvironment-dependent fluorescent properties. In this work, we develop a label-free ratiometric stimulated Raman scattering (SRS) microscopy technique to quantify microscale temperature by monitoring the O-H Raman stretching modes of water. By tracking the ratio changes of the hydrogen-bonding O-H band and the isosbestic band, we can directly quantify the temperature of water-based environments in real time without exogenous contrast agents. We demonstrate real-time measurement of localized intracellular and extracellular temperature changes due to laser absorption. This high-speed nonlinear optical imaging technique has the potential for in situ microscale imaging of thermogenesis in both chemical and biological systems.
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Affiliation(s)
- Benjamin Figueroa
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Ruoqian Hu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Samuel G Rayner
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, Seattle, Washington 98109, United States
| | - Ying Zheng
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Dan Fu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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8
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Härkönen T, Roininen L, Moores MT, Vartiainen EM. Bayesian Quantification for Coherent Anti-Stokes Raman Scattering Spectroscopy. J Phys Chem B 2020; 124:7005-7012. [PMID: 32673491 PMCID: PMC7458428 DOI: 10.1021/acs.jpcb.0c04378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
![]()
We
propose a Bayesian statistical model for analyzing coherent
anti-Stokes Raman scattering (CARS) spectra. Our quantitative analysis
includes statistical estimation of constituent line-shape parameters,
the underlying Raman signal, the error-corrected CARS spectrum, and
the measured CARS spectrum. As such, this work enables extensive uncertainty
quantification in the context of CARS spectroscopy. Furthermore, we
present an unsupervised method for improving spectral resolution of
Raman-like spectra requiring little to no a priori information. Finally, the recently proposed wavelet prism method
for correcting the experimental artifacts in CARS is enhanced by using interpolation techniques for
wavelets. The method is validated using CARS spectra of adenosine
mono-, di-, and triphosphate in water, as well as equimolar aqueous
solutions of d-fructose, d-glucose, and their disaccharide
combination sucrose.
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Affiliation(s)
- Teemu Härkönen
- LUT School of Engineering Science, LUT University, FI-53851 Lappeenranta, Finland
| | - Lassi Roininen
- LUT School of Engineering Science, LUT University, FI-53851 Lappeenranta, Finland
| | - Matthew T Moores
- National Institute for Applied Statistics Research Australia, University of Wollongong, Keiraville NSW 2500, Australia
| | - Erik M Vartiainen
- LUT School of Engineering Science, LUT University, FI-53851 Lappeenranta, Finland
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9
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Sugimura T, Kajimoto S, Nakabayashi T. Label‐Free Imaging of Intracellular Temperature by Using the O−H Stretching Raman Band of Water. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Toshiki Sugimura
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
| | - Shinji Kajimoto
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
| | - Takakazu Nakabayashi
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
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10
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Mizuguchi T, Momotake A, Hishida M, Yasui M, Yamamoto Y, Saiki T, Nuriya M. Multimodal Multiphoton Imaging of the Lipid Bilayer by Dye-Based Sum-Frequency Generation and Coherent Anti-Stokes Raman Scattering. Anal Chem 2020; 92:5656-5660. [PMID: 32202108 DOI: 10.1021/acs.analchem.0c00673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Coherent anti-Stokes Raman scattering (CARS) imaging is widely used for imaging molecular vibrations inside cells and tissues. Lipid bilayers are potential analytes for CARS imaging due to their abundant CH2 vibrational bonds. However, identifying the plasma membrane is challenging since it possesses a thin structure and is closely apposed to lipid structures inside the cells. Since the plasma membrane provides the most prominent asymmetric location within cells, orientation sensitive sum-frequency generation (SFG) imaging is a promising technique for selective visualization of the plasma membrane labeled by a nonfluorescent and SFG-specific dye, Ap3, when using a CARS microscope system. In this study, we closely compare the characteristics of lipid bilayer imaging by dye-based SFG and CARS using giant vesicles (GVs) and N27 rat dopaminergic neural cells. As a result, we show that CARS imaging can be exploited for the visualization of whole lipid structures inside GVs and cells but is insufficient for identification of the plasma membrane, which instead can be achieved using dye-based SFG imaging. In addition, we demonstrate that these unique properties can be combined and applied to the live-cell tracking of intracellular lipid structures such as lipid droplets beneath the plasma membrane. Thus, multimodal multiphoton imaging through a combination of dye-based SFG and CARS can serve as a powerful chemical imaging tool to investigate lipid bilayers in GVs and living cells.
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Affiliation(s)
- Takaha Mizuguchi
- Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.,Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Atsuya Momotake
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Mafumi Hishida
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Masato Yasui
- Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.,Keio Advanced Research Center for Water Biology and Medicine, Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Toshiharu Saiki
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Mutsuo Nuriya
- Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.,Keio Advanced Research Center for Water Biology and Medicine, Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan.,Graduate School of Environment and Information Sciences, Yokohama National University, Kanagawa 240-8501, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
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11
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Sugimura T, Kajimoto S, Nakabayashi T. Label‐Free Imaging of Intracellular Temperature by Using the O−H Stretching Raman Band of Water. Angew Chem Int Ed Engl 2020; 59:7755-7760. [DOI: 10.1002/anie.201915846] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/19/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Toshiki Sugimura
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
| | - Shinji Kajimoto
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
| | - Takakazu Nakabayashi
- Graduate School of Pharmaceutical Sciences Tohoku University, Aoba-ku Sendai 980–8578 Japan
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12
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Ichimura T, Nuriya M. Symposium report: understanding biological systems with quantum science and technology. Biophys Rev 2020; 12:287-289. [PMID: 32112373 DOI: 10.1007/s12551-020-00655-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 02/17/2020] [Indexed: 10/24/2022] Open
Affiliation(s)
- Taro Ichimura
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan. .,RIKEN Biosystems Dynamics Research Center, 6-2-3 Furuedai, Suita, Osaka, 565-0874, Japan. .,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan.
| | - Mutsuo Nuriya
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan.,Department of Pharmacology School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.,Graduate School of Environment and Information Sciences, Yokohama National University, 79-1 Tokiwadai, Hodogaya, Kanagawa, 240-8501, Japan
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13
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Shi L, Hu F, Min W. Optical mapping of biological water in single live cells by stimulated Raman excited fluorescence microscopy. Nat Commun 2019; 10:4764. [PMID: 31628307 PMCID: PMC6802100 DOI: 10.1038/s41467-019-12708-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/25/2019] [Indexed: 11/15/2022] Open
Abstract
Water is arguably the most common and yet least understood material on Earth. Indeed, the biophysical behavior of water in crowded intracellular milieu is a long-debated issue. Understanding of the spatial and compositional heterogeneity of water inside cells remains elusive, largely due to a lack of proper water-sensing tools with high sensitivity and spatial resolution. Recently, stimulated Raman excited fluorescence (SREF) microscopy was reported as the most sensitive vibrational imaging in the optical far field. Herein we develop SREF into a water-sensing tool by coupling it with vibrational solvatochromism. This technique allows us to directly visualize spatially-resolved distribution of water states inside single mammalian cells. Qualitatively, our result supports the concept of biological water and reveals intracellular water heterogeneity between nucleus and cytoplasm. Quantitatively, we unveil a compositional map of the water pool inside living cells. Hence we hope SREF will be a promising tool to study intracellular water and its relationship with cellular activities.
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Affiliation(s)
- Lixue Shi
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Fanghao Hu
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Wei Min
- Department of Chemistry, Columbia University, New York, NY, 10027, USA.
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