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Ye Z, Harrington B, Pickel AD. Optical super-resolution nanothermometry via stimulated emission depletion imaging of upconverting nanoparticles. SCIENCE ADVANCES 2024; 10:eado6268. [PMID: 39018395 PMCID: PMC466949 DOI: 10.1126/sciadv.ado6268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 06/13/2024] [Indexed: 07/19/2024]
Abstract
From engineering improved device performance to unraveling the breakdown of classical heat transfer laws, far-field optical temperature mapping with nanoscale spatial resolution would benefit diverse areas. However, these attributes are traditionally in opposition because conventional far-field optical temperature mapping techniques are inherently diffraction limited. Optical super-resolution imaging techniques revolutionized biological imaging, but such approaches have yet to be applied to thermometry. Here, we demonstrate a super-resolution nanothermometry technique based on highly doped upconverting nanoparticles (UCNPs) that enable stimulated emission depletion (STED) super-resolution imaging. We identify a ratiometric thermometry signal and maintain imaging resolution better than ~120 nm for the relevant spectral bands. We also form self-assembled UCNP monolayers and multilayers and implement a detection scheme with scan times >0.25 μm2/min. We further show that STED nanothermometry reveals a temperature gradient across a joule-heated microstructure that is undetectable with diffraction limited thermometry, indicating the potential of this technique to uncover local temperature variation in wide-ranging practical applications.
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Affiliation(s)
- Ziyang Ye
- Materials Science Program, University of Rochester, Rochester, NY 14627, USA
| | - Benjamin Harrington
- Materials Science Program, University of Rochester, Rochester, NY 14627, USA
| | - Andrea D. Pickel
- Materials Science Program, University of Rochester, Rochester, NY 14627, USA
- Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627, USA
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2
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Saczuk K, Dudek M, Matczyszyn K, Deiana M. Advancements in molecular disassembly of optical probes: a paradigm shift in sensing, bioimaging, and therapeutics. NANOSCALE HORIZONS 2024. [PMID: 38963132 DOI: 10.1039/d4nh00186a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
The majority of self-assembled fluorescent dyes suffer from aggregation-caused quenching (ACQ), which detrimentally affects their diagnostic and therapeutic effectiveness. While aggregation-induced emission (AIE) active dyes offer a promising solution to overcome this limitation, they may face significant challenges as the intracellular environment often prevents aggregation, leading to disassembly and posing challenges for AIE fluorogens. Recent progress in signal amplification through the disassembly of ACQ dyes has opened new avenues for creating ultrasensitive optical sensors and enhancing phototherapeutic outcomes. These advances are well-aligned with cutting-edge technologies such as single-molecule microscopy and targeted molecular therapies. This work explores the concept of disaggregation-induced emission (DIE), showcasing the revolutionary capabilities of DIE-based dyes from their design to their application in sensing, bioimaging, disease monitoring, and treatment in both cellular and animal models. Our objective is to provide an in-depth comparison of aggregation versus disaggregation mechanisms, aiming to stimulate further advancements in the design and utilization of ACQ fluorescent dyes through DIE technology. This initiative is poised to catalyze scientific progress across a broad spectrum of disciplines.
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Affiliation(s)
- Karolina Saczuk
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.
| | - Marta Dudek
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.
| | - Katarzyna Matczyszyn
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM(2)), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Marco Deiana
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.
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3
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Ranasinghe JC, Wang Z, Huang S. Unveiling brain disorders using liquid biopsy and Raman spectroscopy. NANOSCALE 2024; 16:11879-11913. [PMID: 38845582 DOI: 10.1039/d4nr01413h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Brain disorders, including neurodegenerative diseases (NDs) and traumatic brain injury (TBI), present significant challenges in early diagnosis and intervention. Conventional imaging modalities, while valuable, lack the molecular specificity necessary for precise disease characterization. Compared to the study of conventional brain tissues, liquid biopsy, which focuses on blood, tear, saliva, and cerebrospinal fluid (CSF), also unveils a myriad of underlying molecular processes, providing abundant predictive clinical information. In addition, liquid biopsy is minimally- to non-invasive, and highly repeatable, offering the potential for continuous monitoring. Raman spectroscopy (RS), with its ability to provide rich molecular information and cost-effectiveness, holds great potential for transformative advancements in early detection and understanding the biochemical changes associated with NDs and TBI. Recent developments in Raman enhancement technologies and advanced data analysis methods have enhanced the applicability of RS in probing the intricate molecular signatures within biological fluids, offering new insights into disease pathology. This review explores the growing role of RS as a promising and emerging tool for disease diagnosis in brain disorders, particularly through the analysis of liquid biopsy. It discusses the current landscape and future prospects of RS in the diagnosis of brain disorders, highlighting its potential as a non-invasive and molecularly specific diagnostic tool.
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Affiliation(s)
- Jeewan C Ranasinghe
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA.
| | - Ziyang Wang
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA.
| | - Shengxi Huang
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA.
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4
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Gao Z, Han K, Hua X, Liu W, Jia S. hydroSIM: super-resolution speckle illumination microscopy with a hydrogel diffuser. BIOMEDICAL OPTICS EXPRESS 2024; 15:3574-3585. [PMID: 38867780 PMCID: PMC11166422 DOI: 10.1364/boe.521521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/27/2024] [Accepted: 04/18/2024] [Indexed: 06/14/2024]
Abstract
Super-resolution microscopy has emerged as an indispensable methodology for probing the intricacies of cellular biology. Structured illumination microscopy (SIM), in particular, offers an advantageous balance of spatial and temporal resolution, allowing for visualizing cellular processes with minimal disruption to biological specimens. However, the broader adoption of SIM remains hampered by the complexity of instrumentation and alignment. Here, we introduce speckle-illumination super-resolution microscopy using hydrogel diffusers (hydroSIM). The study utilizes the high scattering and optical transmissive properties of hydrogel materials and realizes a remarkably simplified approach to plug-in super-resolution imaging via a common epi-fluorescence platform. We demonstrate the hydroSIM system using various phantom and biological samples, and the results exhibited effective 3D resolution doubling, optical sectioning, and high contrast. We foresee hydroSIM, a cost-effective, biocompatible, and user-accessible super-resolution methodology, to significantly advance a wide range of biomedical imaging and applications.
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Affiliation(s)
- Zijun Gao
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Keyi Han
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
| | - Xuanwen Hua
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
| | - Wenhao Liu
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
| | - Shu Jia
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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5
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Hazra N, Ray R, Banerjee A. Rapid targeting and imaging of mitochondria via carbon dots using an amino acid-based amphiphile as a carrier. NANOSCALE 2024; 16:9827-9835. [PMID: 38695525 DOI: 10.1039/d4nr00665h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
Green-fluorescent biocompatible carbon dots with a quantum yield of 40% were successfully synthesized through a solvothermal process and then they are comprehensively characterized. The carbon dots showed a negatively charged surface owing to the presence of carboxylic groups. This negative surface charge hinders the effective targeting and imaging of mitochondria. To address this limitation, a new approach is developed in this study. An amphiphile containing phenylalanine, with a positively charged polar head consisting of triphenylphosphine and a hydrophobic aliphatic tail, was designed, synthesized, purified, and characterized. This amphiphile formed spherical micelle-type nanostructures in an aqueous medium in the aggregated state. Although these nanoprobes lack inherent fluorescence, they exhibited the capability to image mitochondria when their spherical micelle-type nanostructures were decorated with negatively charged fluorescent nanocarbon dots in both cancerous (KB cells) and non-cancerous (CHO cells) cell lines. Notably, carbon dots without the amphiphile failed to penetrate the cell membrane as they exhibited significantly low emission inside the cell. This study extensively explored the cell entry mechanism of the hybrid nanoprobes. The photophysical changes and the interaction between the negatively charged carbon dots and the positively charged nanospheres of the amphiphile were also analyzed in this study.
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Affiliation(s)
- Niladri Hazra
- School of Biological Science, Indian Association for the Cultivation of Science, Kolkata 700032, India.
| | - Reeddhi Ray
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Arindam Banerjee
- School of Biological Science, Indian Association for the Cultivation of Science, Kolkata 700032, India.
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6
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Noakes F, Smitten KL, Maple LEC, Bernardino de la Serna J, Robertson CC, Pritchard D, Fairbanks SD, Weinstein JA, Smythe CGW, Thomas JA. Phenazine Cations as Anticancer Theranostics †. J Am Chem Soc 2024; 146:12836-12849. [PMID: 38683943 PMCID: PMC11082890 DOI: 10.1021/jacs.4c03491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024]
Abstract
The biological properties of two water-soluble organic cations based on polypyridyl structures commonly used as ligands for photoactive transition metal complexes designed to interact with biomolecules are investigated. A cytotoxicity screen employing a small panel of cell lines reveals that both cations show cytotoxicity toward cancer cells but show reduced cytotoxicity to noncancerous HEK293 cells with the more extended system being notably more active. Although it is not a singlet oxygen sensitizer, the more active cation also displayed enhanced potency on irradiation with visible light, making it active at nanomolar concentrations. Using the intrinsic luminescence of the cations, their cellular uptake was investigated in more detail, revealing that the active compound is more readily internalized than its less lipophilic analogue. Colocalization studies with established cell probes reveal that the active cation predominantly localizes within lysosomes and that irradiation leads to the disruption of mitochondrial structure and function. Stimulated emission depletion (STED) nanoscopy and transmission electron microscopy (TEM) imaging reveal that treatment results in distinct lysosomal swelling and extensive cellular vacuolization. Further imaging-based studies confirm that treatment with the active cation induces lysosomal membrane permeabilization, which triggers lysosome-dependent cell-death due to both necrosis and caspase-dependent apoptosis. A preliminary toxicity screen in the Galleria melonella animal model was carried out on both cations and revealed no detectable toxicity up to concentrations of 80 mg/kg. Taken together, these studies indicate that this class of synthetically easy-to-access photoactive compounds offers potential as novel therapeutic leads.
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Affiliation(s)
- Felicity
F. Noakes
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
- Department
of Biomedical Science, The University of
Sheffield, Western Bank, Sheffield S10 2TN, U.K.
| | - Kirsty L. Smitten
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
- Department
of Molecular Biology and Biotechnology, The University of Sheffield, Western Bank, Sheffield S10 2TN, U.K.
| | - Laura E. C. Maple
- Department
of Biomedical Science, The University of
Sheffield, Western Bank, Sheffield S10 2TN, U.K.
| | - Jorge Bernardino de la Serna
- National
Heart and Lung Institute, Imperial College
London, London SW7 2AZ, U.K.
- Central
Laser
Facility, Rutherford Appleton Laboratory, Research Complex at Harwell, Science and Technology Facilities Council, Harwell-Oxford, Didcot OX11 0QX, U.K.
| | - Craig C. Robertson
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
| | - Dylan Pritchard
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
| | - Simon D. Fairbanks
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
| | - Julia A. Weinstein
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
| | - Carl G. W. Smythe
- Department
of Biomedical Science, The University of
Sheffield, Western Bank, Sheffield S10 2TN, U.K.
| | - Jim A. Thomas
- Department
of Chemistry, The University of Sheffield, Western Bank, Sheffield S3 7HF, U.K.
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7
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Angell DK, Li S, Utzat H, Thurston MLS, Liu Y, Dahl J, Carlson R, Shen ZX, Melosh N, Sinclair R, Dionne JA. Unraveling sources of emission heterogeneity in Silicon Vacancy color centers with cryo-cathodoluminescence microscopy. Proc Natl Acad Sci U S A 2024; 121:e2308247121. [PMID: 38551833 PMCID: PMC10998621 DOI: 10.1073/pnas.2308247121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 01/03/2024] [Indexed: 04/08/2024] Open
Abstract
Diamond color centers have proven to be versatile quantum emitters and exquisite sensors of stress, temperature, electric and magnetic fields, and biochemical processes. Among color centers, the silicon-vacancy (SiV[Formula: see text]) defect exhibits high brightness, minimal phonon coupling, narrow optical linewidths, and high degrees of photon indistinguishability. Yet the creation of reliable and scalable SiV[Formula: see text]-based color centers has been hampered by heterogeneous emission, theorized to originate from surface imperfections, crystal lattice strain, defect symmetry, or other lattice impurities. Here, we advance high-resolution cryo-electron microscopy combined with cathodoluminescence spectroscopy and 4D scanning transmission electron microscopy (STEM) to elucidate the structural sources of heterogeneity in SiV[Formula: see text] emission from nanodiamond with sub-nanometer-scale resolution. Our diamond nanoparticles are grown directly on TEM membranes from molecular-level seedings, representing the natural formation conditions of color centers in diamond. We show that individual subcrystallites within a single nanodiamond exhibit distinct zero-phonon line (ZPL) energies and differences in brightness that can vary by 0.1 meV in energy and over 70% in brightness. These changes are correlated with the atomic-scale lattice structure. We find that ZPL blue-shifts result from tensile strain, while ZPL red shifts are due to compressive strain. We also find that distinct crystallites host distinct densities of SiV[Formula: see text] emitters and that grain boundaries impact SiV[Formula: see text] emission significantly. Finally, we interrogate nanodiamonds as small as 40 nm in diameter and show that these diamonds exhibit no spatial change to their ZPL energy. Our work provides a foundation for atomic-scale structure-emission correlation, e.g., of single atomic defects in a range of quantum and two-dimensional materials.
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Affiliation(s)
- Daniel K. Angell
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
| | - Shuo Li
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025
| | - Hendrik Utzat
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
| | - Matti L. S. Thurston
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
| | - Yin Liu
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
| | - Jeremy Dahl
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025
| | - Robert Carlson
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025
| | - Zhi-Xun Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025
- Department of Physics, Stanford University, Palo Alto, CA94305
- Department of Applied Physics, Stanford University, Palo Alto, CA94305
| | - Nicholas Melosh
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA94025
| | - Robert Sinclair
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
| | - Jennifer A. Dionne
- Department of Materials Science and Engineering, Stanford University, 496 Lomita Mall, Palo Alto, CA94305
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8
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Amos WB. Principles of microscopy for ophthalmologists. Eye (Lond) 2024:10.1038/s41433-024-02970-0. [PMID: 38374367 DOI: 10.1038/s41433-024-02970-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/02/2024] [Accepted: 01/26/2024] [Indexed: 02/21/2024] Open
Abstract
This short review begins with the theories of Airy, Rayleigh and Abbe on microscope resolution. Next, the principal developments in microscopy in the last half-century are examined for relevance to ophthalmology: confocal microscopy, photoactivation light microscopy (PALM), stochastic optical reconstruction microscopy (STORM), stimulated emission depletion (STED), structured illumination (SI), 2-photon and multiphoton excitation microscopy with a focused beam. Except for confocal, these are difficult to apply to the eye in vivo, as are the interference methods available in microscopes. However, interferometry in the form of coherence tomography is now a major ophthalmic method which has diverged from microscopy. Multiphoton excitation microscopy with an unfocussed beam is a new, low-damage microscope method so-far not exploited in ophthalmoscopy. The Mesolens, which throws off the historic limitations in microscopy set by the human eye, is described as a possible future aid to ophthalmology of the anterior eye.
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Affiliation(s)
- William Bradshaw Amos
- Structural Studies Division, UKRI MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK.
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9
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Le Bourdellès G, Mercier L, Roos J, Bancelin S, Nägerl UV. Impact of a tilted coverslip on two-photon and STED microscopy. BIOMEDICAL OPTICS EXPRESS 2024; 15:743-752. [PMID: 38404309 PMCID: PMC10890867 DOI: 10.1364/boe.510512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 02/27/2024]
Abstract
The advent of super-resolution microscopy has opened up new avenues to unveil brain structures with unprecedented spatial resolution in the living state. Yet, its application to live animals remains a genuine challenge. Getting optical access to the brain in vivo requires the use of a 'cranial window', whose mounting greatly influences image quality. Indeed, the coverslip used for the cranial window should lie as orthogonal as possible to the optical axis of the objective, or else significant optical aberrations occur. In this work, we assess the effect of the tilt angle of the coverslip on STED and two-photon microscopy, in particular, image brightness and spatial resolution. We then propose an approach to measure and reduce the tilt using a simple device added to the microscope, which can ensure orthogonality with a precision of 0.07°.
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Affiliation(s)
| | - Luc Mercier
- Univ. Bordeaux, CNRS, IINS, UMR5297, F-33000 Bordeaux, France
| | - Johannes Roos
- Univ. Bordeaux, CNRS, IINS, UMR5297, F-33000 Bordeaux, France
| | - Stéphane Bancelin
- Univ. Bordeaux, CNRS, IINS, UMR5297, F-33000 Bordeaux, France
- IOGS, CNRS, LP2N, UMR5298, F-33400 Talence, France
- Univ. Bordeaux, CNRS, LP2N, UMR5298, F-33400 Talence, France
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10
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Zou Y, Jin H, Zhu R, Zhang T. Metasurface Holography with Multiplexing and Reconfigurability. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:66. [PMID: 38202521 PMCID: PMC10780441 DOI: 10.3390/nano14010066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/22/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024]
Abstract
Metasurface holography offers significant advantages, including a broad field of view, minimal noise, and high imaging quality, making it valuable across various optical domains such as 3D displays, VR, and color displays. However, most passive pure-structured metasurface holographic devices face a limitation: once fabricated, as their functionality remains fixed. In recent developments, the introduction of multiplexed and reconfigurable metasurfaces breaks this limitation. Here, the comprehensive progress in holography from single metasurfaces to multiplexed and reconfigurable metasurfaces is reviewed. First, single metasurface holography is briefly introduced. Second, the latest progress in angular momentum multiplexed metasurface holography, including basic characteristics, design strategies, and diverse applications, is discussed. Next, a detailed overview of wavelength-sensitive, angle-sensitive, and polarization-controlled holograms is considered. The recent progress in reconfigurable metasurface holography based on lumped elements is highlighted. Its instant on-site programmability combined with machine learning provides the possibility of realizing movie-like dynamic holographic displays. Finally, we briefly summarize this rapidly growing area of research, proposing future directions and potential applications.
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Affiliation(s)
- Yijun Zou
- Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China; (Y.Z.); (H.J.); (R.Z.)
| | - Hui Jin
- Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China; (Y.Z.); (H.J.); (R.Z.)
| | - Rongrong Zhu
- Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China; (Y.Z.); (H.J.); (R.Z.)
- School of Information and Electrical Engineering, Zhejiang University City College, Hangzhou 310015, China
| | - Ting Zhang
- College of Information Science & Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Processing, Communication and Networking (IPCN), Zhejiang University, Hangzhou 310027, China
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11
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Jeong S, Koh D, Gwak E, Srambickal CV, Seo D, Widengren J, Lee JC. Pushing the Resolution Limit of Stimulated Emission Depletion Optical Nanoscopy. Int J Mol Sci 2023; 25:26. [PMID: 38203197 PMCID: PMC10779414 DOI: 10.3390/ijms25010026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 01/12/2024] Open
Abstract
Optical nanoscopy, also known as super-resolution optical microscopy, has provided scientists with the means to surpass the diffraction limit of light microscopy and attain new insights into nanoscopic structures and processes that were previously inaccessible. In recent decades, numerous studies have endeavored to enhance super-resolution microscopy in terms of its spatial (lateral) resolution, axial resolution, and temporal resolution. In this review, we discuss recent efforts to push the resolution limit of stimulated emission depletion (STED) optical nanoscopy across multiple dimensions, including lateral resolution, axial resolution, temporal resolution, and labeling precision. We introduce promising techniques and methodologies building on the STED concept that have emerged in the field, such as MINSTED, isotropic STED, and event-triggered STED, and evaluate their respective strengths and limitations. Moreover, we discuss trade-off relationships that exist in far-field optical microscopy and how they come about in STED optical nanoscopy. By examining the latest developments addressing these aspects, we aim to provide an updated overview of the current state of STED nanoscopy and its potential for future research.
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Affiliation(s)
- Sejoo Jeong
- Department of New Biology, DGIST, Daegu 42988, Republic of Korea
| | - Dongbin Koh
- School of Undergraduate Studies, DGIST, Daegu 42988, Republic of Korea
| | - Eunha Gwak
- Department of New Biology, DGIST, Daegu 42988, Republic of Korea
| | - Chinmaya V. Srambickal
- Exp. Biomol. Physics, Dept. Applied Physics, KTH—Royal Institute of Technology, 106 91 Stockholm, Sweden
| | - Daeha Seo
- Department of Physics and Chemistry, DGIST, Daegu 42988, Republic of Korea
| | - Jerker Widengren
- Exp. Biomol. Physics, Dept. Applied Physics, KTH—Royal Institute of Technology, 106 91 Stockholm, Sweden
| | - Jong-Chan Lee
- Department of New Biology, DGIST, Daegu 42988, Republic of Korea
- New Biology Research Center, DGIST, Daegu 42988, Republic of Korea
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12
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Huang R, Huang CH, Chen J, Yan ZY, Tang M, Shao J, Cai K, Zhu BZ. Unprecedented enantio-selective live-cell mitochondrial DNA super-resolution imaging and photo-sensitizing by the chiral ruthenium polypyridyl DNA "light-switch". Nucleic Acids Res 2023; 51:11981-11998. [PMID: 37933856 PMCID: PMC10711558 DOI: 10.1093/nar/gkad799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 07/25/2023] [Accepted: 09/19/2023] [Indexed: 11/08/2023] Open
Abstract
Mitochondrial DNA (mtDNA) is known to play a critical role in cellular functions. However, the fluorescent probe enantio-selectively targeting live-cell mtDNA is rare. We recently found that the well-known DNA 'light-switch' [Ru(phen)2dppz]Cl2 can image nuclear DNA in live-cells with chlorophenolic counter-anions via forming lipophilic ion-pairing complex. Interestingly, after washing with fresh-medium, [Ru(phen)2dppz]Cl2 was found to re-localize from nucleus to mitochondria via ABC transporter proteins. Intriguingly, the two enantiomers of [Ru(phen)2dppz]Cl2 were found to bind enantio-selectively with mtDNA in live-cells not only by super-resolution optical microscopy techniques (SIM, STED), but also by biochemical methods (mitochondrial membrane staining with Tomo20-dronpa). Using [Ru(phen)2dppz]Cl2 as the new mtDNA probe, we further found that each mitochondrion containing 1-8 mtDNA molecules are distributed throughout the entire mitochondrial matrix, and there are more nucleoids near nucleus. More interestingly, we found enantio-selective apoptotic cell death was induced by the two enantiomers by prolonged visible light irradiation, and in-situ self-monitoring apoptosis process can be achieved by using the unique 'photo-triggered nuclear translocation' property of the Ru complex. This is the first report on enantio-selective targeting and super-resolution imaging of live-cell mtDNA by a chiral Ru complex via formation and dissociation of ion-pairing complex with suitable counter-anions.
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Affiliation(s)
- Rong Huang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chun-Hua Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jing Chen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhu-Ying Yan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
| | - Miao Tang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jie Shao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Ben-Zhan Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Environmental Science and Technology, Shandong University, Qingdao, Shandong 266237, PR China
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13
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Gonzalez-Ramos S, Wang J, Cho JM, Zhu E, Park SK, In JG, Reddy ST, Castillo EF, Campen MJ, Hsiai TK. Integrating 4-D light-sheet fluorescence microscopy and genetic zebrafish system to investigate ambient pollutants-mediated toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:165947. [PMID: 37543337 PMCID: PMC10659062 DOI: 10.1016/j.scitotenv.2023.165947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/28/2023] [Accepted: 07/29/2023] [Indexed: 08/07/2023]
Abstract
Ambient air pollutants, including PM2.5 (aerodynamic diameter d ~2.5 μm), PM10 (d ~10 μm), and ultrafine particles (UFP: d < 0.1 μm) impart both short- and long-term toxicity to various organs, including cardiopulmonary, central nervous, and gastrointestinal systems. While rodents have been the principal animal model to elucidate air pollution-mediated organ dysfunction, zebrafish (Danio rerio) is genetically tractable for its short husbandry and life cycle to study ambient pollutants. Its electrocardiogram (ECG) resembles that of humans, and the fluorescent reporter-labeled tissues in the zebrafish system allow for screening a host of ambient pollutants that impair cardiovascular development, organ regeneration, and gut-vascular barriers. In parallel, the high spatiotemporal resolution of light-sheet fluorescence microscopy (LSFM) enables investigators to take advantage of the transparent zebrafish embryos and genetically labeled fluorescent reporters for imaging the dynamic cardiac structure and function at a single-cell resolution. In this context, our review highlights the integrated strengths of the genetic zebrafish system and LSFM for high-resolution and high-throughput investigation of ambient pollutants-mediated cardiac and intestinal toxicity.
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Affiliation(s)
- Sheila Gonzalez-Ramos
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA; Department of Bioengineering, School of Engineering & Applied Science, University of California, Los Angeles, CA, USA
| | - Jing Wang
- Department of Bioengineering, School of Engineering & Applied Science, University of California, Los Angeles, CA, USA
| | - Jae Min Cho
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
| | - Enbo Zhu
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
| | - Seul-Ki Park
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
| | - Julie G In
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Srinivasa T Reddy
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA; Department of Molecular and Medical Pharmacology, University of California, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Degree Program, Fielding School of Public Health, University of California, Los Angeles, CA, USA
| | - Eliseo F Castillo
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Matthew J Campen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Tzung K Hsiai
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA, USA; Department of Bioengineering, School of Engineering & Applied Science, University of California, Los Angeles, CA, USA; Greater Los Angeles VA Healthcare System, Department of Medicine, Los Angeles, California, USA.
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14
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Jeong S, Kim J, Koh D, Lee JC. Simultaneously enhancing the resolution and signal-to-background ratio in STED optical nanoscopy via differential depletion. OPTICS EXPRESS 2023; 31:37549-37563. [PMID: 38017882 DOI: 10.1364/oe.505430] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 10/08/2023] [Indexed: 11/30/2023]
Abstract
STED (stimulated emission depletion) far-field optical nanoscopy achieves resolution beyond the diffraction limit by depleting fluorescence at the periphery of excitation with a donut-shaped depletion laser. What is traded off with the superior resolution of STED nanoscopy is the unwanted elevation of structured background noise which hampers the quality of STED images. Here, we alleviate the background noise problem by adopting the differential stimulated emission depletion (diffSTED) approach. In diffSTED nanoscopy, signals obtained with different depletion strengths are compared and properly subtracted to remove two major background noise sources in STED nanoscopy. We show via simulations that by using diffSTED nanoscopy, background noise is significantly decreased, and the image contrast is improved. In addition, we show by simulation and analytical calculation that diffSTED improves resolution simultaneously. We assess the effect of different parameters, such as the STED beam intensity, depletion intensity ratio of two STED beams, and the subtraction factor, on the signal-to-background ratio (SBR) and the resolution of diffSTED nanoscopy. We introduce a logical algorithm to determine the optimal subtraction factor and the depletion intensity ratio. DiffSTED nanoscopy is a versatile technique that can be readily applied to any STED system without requiring any hardware modifications. We predict the wide applicability of diffSTED for its enhanced resolution, improved SBR, and easiness of implementation.
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15
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Samanta S, Lai K, Wu F, Liu Y, Cai S, Yang X, Qu J, Yang Z. Xanthene, cyanine, oxazine and BODIPY: the four pillars of the fluorophore empire for super-resolution bioimaging. Chem Soc Rev 2023; 52:7197-7261. [PMID: 37743716 DOI: 10.1039/d2cs00905f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
In the realm of biological research, the invention of super-resolution microscopy (SRM) has enabled the visualization of ultrafine sub-cellular structures and their functions in live cells at the nano-scale level, beyond the diffraction limit, which has opened up a new window for advanced biomedical studies to unravel the complex unknown details of physiological disorders at the sub-cellular level with unprecedented resolution and clarity. However, most of the SRM techniques are highly reliant on the personalized special photophysical features of the fluorophores. In recent times, there has been an unprecedented surge in the development of robust new fluorophore systems with personalized features for various super-resolution imaging techniques. To date, xanthene, cyanine, oxazine and BODIPY cores have been authoritatively utilized as the basic fluorophore units in most of the small-molecule-based organic fluorescent probe designing strategies for SRM owing to their excellent photophysical characteristics and easy synthetic acquiescence. Since the future of next-generation SRM studies will be decided by the availability of advanced fluorescent probes and these four fluorescent building blocks will play an important role in progressive new fluorophore design, there is an urgent need to review the recent advancements in designing fluorophores for different SRM methods based on these fluorescent dye cores. This review article not only includes a comprehensive discussion about the recent developments in designing fluorescent probes for various SRM techniques based on these four important fluorophore building blocks with special emphasis on their effective integration into live cell super-resolution bio-imaging applications but also critically evaluates the background of each of the fluorescent dye cores to highlight their merits and demerits towards developing newer fluorescent probes for SRM.
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Affiliation(s)
- Soham Samanta
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Kaitao Lai
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Feihu Wu
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Yingchao Liu
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Songtao Cai
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Xusan Yang
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Junle Qu
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Zhigang Yang
- Center for Biomedical Optics and Photonics & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
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16
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He M, Shen X, Liu X, Kuang C, Liu X. 3D nanoprinting for fiber-integrated achromatic diffractive lens. OPTICS LETTERS 2023; 48:5221-5224. [PMID: 37831832 DOI: 10.1364/ol.501356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/12/2023] [Indexed: 10/15/2023]
Abstract
Achromatic performance is crucial for numerous multi-wavelength optical fiber applications, including endoscopic imaging and fiber sensing. This paper presents the design and nanoprinting of a fiber-integrated achromatic diffractive lens within the visible spectrum (450-650 nm). The 3D nanoprinting is achieved by a high-resolution direct laser writing technology, overcoming limitations in the optical performance caused by the lack of an arbitrary 3D structure writing capability and an insufficient feature resolution in the current manufacturing technology for visible light broadband achromatic diffractive lenses. A three-step optimization algorithm is proposed to effectively balance optical performance with writing difficulty. The characterization results demonstrate excellent achromatic focusing performance, paving the way towards the development of nanoprinted flat optical devices for applications such as optical fiber traps, miniature illumination systems, and integrated photonic chips.
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17
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Demirbay B, Baryshnikov G, Haraldsson M, Piguet J, Ågren H, Widengren J. Photo-physical characterization of high triplet yield brominated fluoresceins by transient state (TRAST) spectroscopy. Methods Appl Fluoresc 2023; 11:045011. [PMID: 37726005 DOI: 10.1088/2050-6120/acfb59] [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: 05/12/2023] [Accepted: 09/19/2023] [Indexed: 09/21/2023]
Abstract
Photo-induced dark transient states of fluorophores can pose a problem in fluorescence spectroscopy. However, their typically long lifetimes also make them highly environment sensitive, suggesting fluorophores with prominent dark-state formation yields to be used as microenvironmental sensors in bio-molecular spectroscopy and imaging. In this work, we analyzed the singlet-triplet transitions of fluorescein and three synthesized carboxy-fluorescein derivatives, with one, two or four bromines linked to the anthracence backbone. Using transient state (TRAST) spectroscopy, we found a prominent internal heavy atom (IHA) enhancement of the intersystem crossing (ISC) rates upon bromination, inferred by density functional theory calculations to take place via a higher triplet state, followed by relaxation to the lowest triplet state. A corresponding external heavy atom (EHA) enhancement was found upon adding potassium iodide (KI). Notably, increased KI concentrations still resulted in lowered triplet state buildup in the brominated fluorophores, due to relatively lower enhancements in ISC, than in the triplet decay. Together with an antioxidative effect on the fluorophores, adding KI thus generated a fluorescence enhancement of the brominated fluorophores. By TRAST measurements, analyzing the average fluorescence intensity of fluorescent molecules subject to a systematically varied excitation modulation, dark state transitions within very high triplet yield (>90%) fluorophores can be directly analyzed under biologically relevant conditions. These measurements, not possible by other techniques such as fluorescence correlation spectroscopy, opens for bio-sensing applications based on high triplet yield fluorophores, and for characterization of high triplet yield photodynamic therapy agents, and how they are influenced by IHA and EHA effects.
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Affiliation(s)
- Baris Demirbay
- Royal Institute of Technology (KTH), Experimental Biomolecular Physics, Department of Applied Physics, Albanova University Center, SE-106 91, Stockholm, Sweden
| | - Glib Baryshnikov
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174, Norrköping, Sweden
| | - Martin Haraldsson
- Chemical Biology Consortium Sweden, Science for Life Laboratory, Department of Medical Biochemistry and Biophysics, Karolinska Institute, SE-171 77 Stockholm, Sweden
| | - Joachim Piguet
- Royal Institute of Technology (KTH), Experimental Biomolecular Physics, Department of Applied Physics, Albanova University Center, SE-106 91, Stockholm, Sweden
| | - Hans Ågren
- Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Jerker Widengren
- Royal Institute of Technology (KTH), Experimental Biomolecular Physics, Department of Applied Physics, Albanova University Center, SE-106 91, Stockholm, Sweden
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18
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Kudo T, Louis B, Sotome H, Chen JK, Ito S, Miyasaka H, Masuhara H, Hofkens J, Bresolí-Obach R. Gaining control on optical force by the stimulated-emission resonance effect. Chem Sci 2023; 14:10087-10095. [PMID: 37772121 PMCID: PMC10530829 DOI: 10.1039/d3sc01927f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 08/18/2023] [Indexed: 09/30/2023] Open
Abstract
The resonance between an electronic transition of a micro/nanoscale object and an incident photon flux can modify the radiation force exerted on that object, especially at an interface. It has been theoretically proposed that a non-linear stimulated emission process can also induce an optical force, however its direction will be opposite to conventional photon scattering/absorption processes. In this work, we experimentally and theoretically demonstrate that a stimulated emission process can induce a repulsive pulling optical force on a single trapped dye-doped particle. Moreover, we successfully integrate both attractive pushing (excited state absorption) and repulsive pulling (stimulated emission) resonance forces to control the overall exerted optical force on an object, validating the proposed non-linear optical resonance theory. Indeed, the results presented here will enable the optical manipulation of the exerted optical force with exquisite control and ultimately enable single particle manipulation.
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Affiliation(s)
- Tetsuhiro Kudo
- Laser Science Laboratory, Toyota Technological Institute Hisakata, Tempaku-ku Nagoya 468-8511 Japan
| | - Boris Louis
- Laboratory for Photochemistry and Spectroscopy, Division for Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven Belgium
- Division of Chemical Physics and NanoLund, Lund University P.O. Box 124 Lund Sweden
| | - Hikaru Sotome
- Division of Frontier Materials Science and Center for Promotion of Advanced Interdisciplinary Research, Osaka University Toyonaka Osaka 560-8531 Japan
| | - Jui-Kai Chen
- Laboratory for Photochemistry and Spectroscopy, Division for Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven Belgium
| | - Syoji Ito
- Division of Frontier Materials Science and Center for Promotion of Advanced Interdisciplinary Research, Osaka University Toyonaka Osaka 560-8531 Japan
- Research Institute for Light-induced Acceleration System (RILACS), Osaka Metropolitan University 1-2, Gakuen-cho, Naka-ku Sakai Osaka 599-8570 Japan
| | - Hiroshi Miyasaka
- Division of Frontier Materials Science and Center for Promotion of Advanced Interdisciplinary Research, Osaka University Toyonaka Osaka 560-8531 Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry, College of Science, National Yang Ming Chiao Tung University Hsinchu Taiwan
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Johan Hofkens
- Laboratory for Photochemistry and Spectroscopy, Division for Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven Belgium
- Max Planck Institute for Polymer Research Mainz 55128 Germany
| | - Roger Bresolí-Obach
- Laboratory for Photochemistry and Spectroscopy, Division for Molecular Imaging and Photonics, Department of Chemistry, Katholieke Universiteit Leuven Belgium
- AppLightChem, Institut Químic de Sarrià, Universitat Ramon Llull Barcelona Catalunya Spain
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19
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Jang S, Narayanasamy KK, Rahm JV, Saguy A, Kompa J, Dietz MS, Johnsson K, Shechtman Y, Heilemann M. Neural network-assisted single-molecule localization microscopy with a weak-affinity protein tag. BIOPHYSICAL REPORTS 2023; 3:100123. [PMID: 37680382 PMCID: PMC10480660 DOI: 10.1016/j.bpr.2023.100123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/16/2023] [Indexed: 09/09/2023]
Abstract
Single-molecule localization microscopy achieves nanometer spatial resolution by localizing single fluorophores separated in space and time. A major challenge of single-molecule localization microscopy is the long acquisition time, leading to low throughput, as well as to a poor temporal resolution that limits its use to visualize the dynamics of cellular structures in live cells. Another challenge is photobleaching, which reduces information density over time and limits throughput and the available observation time in live-cell applications. To address both challenges, we combine two concepts: first, we integrate the neural network DeepSTORM to predict super-resolution images from high-density imaging data, which increases acquisition speed. Second, we employ a direct protein label, HaloTag7, in combination with exchangeable ligands (xHTLs), for fluorescence labeling. This labeling method bypasses photobleaching by providing a constant signal over time and is compatible with live-cell imaging. The combination of both a neural network and a weak-affinity protein label reduced the acquisition time up to ∼25-fold. Furthermore, we demonstrate live-cell imaging with increased temporal resolution, and capture the dynamics of the endoplasmic reticulum over extended time without signal loss.
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Affiliation(s)
- Soohyen Jang
- Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
- Institute of Physical and Theoretical Chemistry, IMPRS on Cellular Biophysics, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
| | - Kaarjel K. Narayanasamy
- Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
- Department of Functional Neuroanatomy, Institute for Anatomy and Cell Biology, Heidelberg University, Heidelberg, Germany
| | - Johanna V. Rahm
- Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
| | - Alon Saguy
- Department of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Julian Kompa
- Department of Chemical Biology, Max Planck Institute for Medical Research, Heidelberg, Germany
| | - Marina S. Dietz
- Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
| | - Kai Johnsson
- Department of Chemical Biology, Max Planck Institute for Medical Research, Heidelberg, Germany
| | - Yoav Shechtman
- Department of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Mike Heilemann
- Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
- Institute of Physical and Theoretical Chemistry, IMPRS on Cellular Biophysics, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany
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20
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Wang H, Li Q, Alam P, Bai H, Bhalla V, Bryce MR, Cao M, Chen C, Chen S, Chen X, Chen Y, Chen Z, Dang D, Ding D, Ding S, Duo Y, Gao M, He W, He X, Hong X, Hong Y, Hu JJ, Hu R, Huang X, James TD, Jiang X, Konishi GI, Kwok RTK, Lam JWY, Li C, Li H, Li K, Li N, Li WJ, Li Y, Liang XJ, Liang Y, Liu B, Liu G, Liu X, Lou X, Lou XY, Luo L, McGonigal PR, Mao ZW, Niu G, Owyong TC, Pucci A, Qian J, Qin A, Qiu Z, Rogach AL, Situ B, Tanaka K, Tang Y, Wang B, Wang D, Wang J, Wang W, Wang WX, Wang WJ, Wang X, Wang YF, Wu S, Wu Y, Xiong Y, Xu R, Yan C, Yan S, Yang HB, Yang LL, Yang M, Yang YW, Yoon J, Zang SQ, Zhang J, Zhang P, Zhang T, Zhang X, Zhang X, Zhao N, Zhao Z, Zheng J, Zheng L, Zheng Z, Zhu MQ, Zhu WH, Zou H, Tang BZ. Aggregation-Induced Emission (AIE), Life and Health. ACS NANO 2023; 17:14347-14405. [PMID: 37486125 PMCID: PMC10416578 DOI: 10.1021/acsnano.3c03925] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
Light has profoundly impacted modern medicine and healthcare, with numerous luminescent agents and imaging techniques currently being used to assess health and treat diseases. As an emerging concept in luminescence, aggregation-induced emission (AIE) has shown great potential in biological applications due to its advantages in terms of brightness, biocompatibility, photostability, and positive correlation with concentration. This review provides a comprehensive summary of AIE luminogens applied in imaging of biological structure and dynamic physiological processes, disease diagnosis and treatment, and detection and monitoring of specific analytes, followed by representative works. Discussions on critical issues and perspectives on future directions are also included. This review aims to stimulate the interest of researchers from different fields, including chemistry, biology, materials science, medicine, etc., thus promoting the development of AIE in the fields of life and health.
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Affiliation(s)
- Haoran Wang
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Qiyao Li
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
- State
Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial
Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
| | - Parvej Alam
- Clinical
Translational Research Center of Aggregation-Induced Emission, School
of Medicine, The Second Affiliated Hospital, School of Science and
Engineering, The Chinese University of Hong
Kong, Shenzhen (CUHK- Shenzhen), Guangdong 518172, China
| | - Haotian Bai
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Organic
Solids, Institute of Chemistry, Chinese
Academy of Sciences, Beijing 100190, China
| | - Vandana Bhalla
- Department
of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Martin R. Bryce
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Mingyue Cao
- State
Key Laboratory of Crystal Materials, Shandong
University, Jinan 250100, China
| | - Chao Chen
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Sijie Chen
- Ming
Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Sha Tin, Hong Kong SAR 999077, China
| | - Xirui Chen
- State Key
Laboratory of Food Science and Resources, School of Food Science and
Technology, Nanchang University, Nanchang 330047, China
| | - Yuncong Chen
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Chemistry and Biomedicine Innovation Center
(ChemBIC), Department of Cardiothoracic Surgery, Nanjing Drum Tower
Hospital, Medical School, Nanjing University, Nanjing 210023, China
| | - Zhijun Chen
- Engineering
Research Center of Advanced Wooden Materials and Key Laboratory of
Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Dongfeng Dang
- School
of Chemistry, Xi’an Jiaotong University, Xi’an 710049 China
| | - Dan Ding
- State
Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive
Materials, Ministry of Education, and College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Siyang Ding
- Department
of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Yanhong Duo
- Department
of Radiation Oncology, Shenzhen People’s Hospital (The Second
Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong 518020, China
| | - Meng Gao
- National
Engineering Research Center for Tissue Restoration and Reconstruction,
Key Laboratory of Biomedical Engineering of Guangdong Province, Key
Laboratory of Biomedical Materials and Engineering of the Ministry
of Education, Innovation Center for Tissue Restoration and Reconstruction,
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China
| | - Wei He
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Xuewen He
- The
Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren’ai Road, Suzhou 215123, China
| | - Xuechuan Hong
- State
Key Laboratory of Virology, Department of Cardiology, Zhongnan Hospital
of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Yuning Hong
- Department
of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Jing-Jing Hu
- State
Key Laboratory of Biogeology and Environmental Geology, Engineering
Research Center of Nano-Geomaterials of Ministry of Education, Faculty
of Materials Science and Chemistry, China
University of Geosciences, Wuhan 430074, China
| | - Rong Hu
- School
of Chemistry and Chemical Engineering, University
of South China, Hengyang 421001, China
| | - Xiaolin Huang
- State Key
Laboratory of Food Science and Resources, School of Food Science and
Technology, Nanchang University, Nanchang 330047, China
| | - Tony D. James
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Xingyu Jiang
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory
of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Road, Nanshan District, Shenzhen, Guangdong 518055, China
| | - Gen-ichi Konishi
- Department
of Chemical Science and Engineering, Tokyo
Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryan T. K. Kwok
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Jacky W. Y. Lam
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Chunbin Li
- College
of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory
of Fine Organic Synthesis, Inner Mongolia
University, Hohhot 010021, China
| | - Haidong Li
- State
Key Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Kai Li
- College
of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
| | - Nan Li
- Key
Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory
of Applied Surface and Colloid Chemistry of Ministry of Education,
School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Wei-Jian Li
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung
Chuang Institute, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
| | - Ying Li
- Innovation
Research Center for AIE Pharmaceutical Biology, Guangzhou Municipal
and Guangdong Provincial Key Laboratory of Molecular Target &
Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory
Disease, School of Pharmaceutical Sciences and the Fifth Affiliated
Hospital, Guangzhou Medical University, Guangzhou 511436, China
| | - Xing-Jie Liang
- CAS
Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, China
- School
of Biomedical Engineering, Guangzhou Medical
University, Guangzhou 511436, China
| | - Yongye Liang
- Department
of Materials Science and Engineering, Shenzhen Key Laboratory of Printed
Organic Electronics, Southern University
of Science and Technology, Shenzhen 518055, China
| | - Bin Liu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Guozhen Liu
- Ciechanover
Institute of Precision and Regenerative Medicine, School of Medicine, The Chinese University of Hong Kong, Shenzhen (CUHK- Shenzhen), Guangdong 518172, China
| | - Xingang Liu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Xiaoding Lou
- State
Key Laboratory of Biogeology and Environmental Geology, Engineering
Research Center of Nano-Geomaterials of Ministry of Education, Faculty
of Materials Science and Chemistry, China
University of Geosciences, Wuhan 430074, China
| | - Xin-Yue Lou
- International
Joint Research Laboratory of Nano-Micro Architecture Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Liang Luo
- National
Engineering Research Center for Nanomedicine, College of Life Science
and Technology, Huazhong University of Science
and Technology, Wuhan 430074, China
| | - Paul R. McGonigal
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, United
Kingdom
| | - Zong-Wan Mao
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry, Sun Yat-Sen University, Guangzhou 510006, China
| | - Guangle Niu
- State
Key Laboratory of Crystal Materials, Shandong
University, Jinan 250100, China
| | - Tze Cin Owyong
- Department
of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Andrea Pucci
- Department
of Chemistry and Industrial Chemistry, University
of Pisa, Via Moruzzi 13, Pisa 56124, Italy
| | - Jun Qian
- State
Key Laboratory of Modern Optical Instrumentations, Centre for Optical
and Electromagnetic Research, College of Optical Science and Engineering,
International Research Center for Advanced Photonics, Zhejiang University, Hangzhou 310058, China
| | - Anjun Qin
- State
Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial
Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
| | - Zijie Qiu
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
| | - Andrey L. Rogach
- Department
of Materials Science and Engineering, City
University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Bo Situ
- Department
of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Kazuo Tanaka
- Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura,
Nishikyo-ku, Kyoto 615-8510, Japan
| | - Youhong Tang
- Institute
for NanoScale Science and Technology, College of Science and Engineering, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Bingnan Wang
- State
Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial
Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China
| | - Dong Wang
- Center
for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jianguo Wang
- College
of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory
of Fine Organic Synthesis, Inner Mongolia
University, Hohhot 010021, China
| | - Wei Wang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung
Chuang Institute, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
| | - Wen-Xiong Wang
- School
of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Wen-Jin Wang
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry, Sun Yat-Sen University, Guangzhou 510006, China
- Central
Laboratory of The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen (CUHK-
Shenzhen), & Longgang District People’s Hospital of Shenzhen, Guangdong 518172, China
| | - Xinyuan Wang
- Department
of Materials Science and Engineering, Shenzhen Key Laboratory of Printed
Organic Electronics, Southern University
of Science and Technology, Shenzhen 518055, China
| | - Yi-Feng Wang
- CAS
Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, China
- School
of Biomedical Engineering, Guangzhou Medical
University, Guangzhou 511436, China
| | - Shuizhu Wu
- State
Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial
Key Laboratory of Luminescence from Molecular Aggregates, College
of Materials Science and Engineering, South
China University of Technology, Wushan Road 381, Guangzhou 510640, China
| | - Yifan Wu
- Innovation
Research Center for AIE Pharmaceutical Biology, Guangzhou Municipal
and Guangdong Provincial Key Laboratory of Molecular Target &
Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory
Disease, School of Pharmaceutical Sciences and the Fifth Affiliated
Hospital, Guangzhou Medical University, Guangzhou 511436, China
| | - Yonghua Xiong
- State Key
Laboratory of Food Science and Resources, School of Food Science and
Technology, Nanchang University, Nanchang 330047, China
| | - Ruohan Xu
- School
of Chemistry, Xi’an Jiaotong University, Xi’an 710049 China
| | - Chenxu Yan
- Key
Laboratory for Advanced Materials and Joint International Research,
Laboratory of Precision Chemistry and Molecular Engineering, Feringa
Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals,
Frontiers Science Center for Materiobiology and Dynamic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Saisai Yan
- Center
for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Hai-Bo Yang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes & Chang-Kung
Chuang Institute, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China
| | - Lin-Lin Yang
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
| | - Mingwang Yang
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Ying-Wei Yang
- International
Joint Research Laboratory of Nano-Micro Architecture Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Juyoung Yoon
- Department
of Chemistry and Nanoscience, Ewha Womans
University, Seoul 03760, Korea
| | - Shuang-Quan Zang
- College
of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
| | - Jiangjiang Zhang
- Guangdong
Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory
of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Road, Nanshan District, Shenzhen, Guangdong 518055, China
- Key
Laboratory of Molecular Medicine and Biotherapy, the Ministry of Industry
and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Pengfei Zhang
- Guangdong
Key Laboratory of Nanomedicine, Shenzhen, Engineering Laboratory of
Nanomedicine and Nanoformulations, CAS Key Lab for Health Informatics,
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, University Town of Shenzhen, 1068 Xueyuan Avenue, Shenzhen 518055, China
| | - Tianfu Zhang
- School
of Biomedical Engineering, Guangzhou Medical
University, Guangzhou 511436, China
| | - Xin Zhang
- Department
of Chemistry, Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou, Zhejiang Province 310030, China
- Westlake
Laboratory of Life Sciences and Biomedicine, 18 Shilongshan Road, Hangzhou, Zhejiang Province 310024, China
| | - Xin Zhang
- Ciechanover
Institute of Precision and Regenerative Medicine, School of Medicine, The Chinese University of Hong Kong, Shenzhen (CUHK- Shenzhen), Guangdong 518172, China
| | - Na Zhao
- Key
Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory
of Applied Surface and Colloid Chemistry of Ministry of Education,
School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Zheng Zhao
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
| | - Jie Zheng
- Department
of Chemical, Biomolecular, and Corrosion Engineering The University of Akron, Akron, Ohio 44325, United States
| | - Lei Zheng
- Department
of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zheng Zheng
- School of
Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Ming-Qiang Zhu
- Wuhan
National
Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei-Hong Zhu
- Key
Laboratory for Advanced Materials and Joint International Research,
Laboratory of Precision Chemistry and Molecular Engineering, Feringa
Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals,
Frontiers Science Center for Materiobiology and Dynamic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hang Zou
- Department
of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Ben Zhong Tang
- School
of Science and Engineering, Shenzhen Institute of Aggregate Science
and Technology, The Chinese University of
Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong 518172, China
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, Division of Life
Science, State Key Laboratory of Molecular Neuroscience, Guangdong-Hong
Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional
Materials, The Hong Kong University of Science
and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
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21
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Kadoguchi N, Uesugi Y, Nagasako M, Kobayashi T, Kozawa Y, Sato S. Nanoprocessing of Self-Suspended Monolayer Graphene and Defect Formation by Femtosecond-Laser Irradiation. NANO LETTERS 2023; 23:4893-4900. [PMID: 37192436 PMCID: PMC10274822 DOI: 10.1021/acs.nanolett.3c00594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 05/07/2023] [Indexed: 05/18/2023]
Abstract
We demonstrate the femtosecond-laser processing of self-suspended monolayer graphene grown by chemical vapor deposition, resulting in multipoint drilling with holes having a diameter of <100 nm. Scanning transmission electron microscopy revealed the formation of many nanopores on the laser-irradiated graphene. Furthermore, atomic-level defects as well as nanopores were found in the graphene membrane by high-resolution transmission electron microscopy, while the overall crystal structure remained intact. Raman spectroscopy showed an increase in the defect density with an increase in the number of laser shots, suggesting that the nanopore formation triggered the creation of the <100 nm holes. The approach presented herein can offer an experimental insight into the simulation of atomic dynamics in graphene under femtosecond-laser irradiation. The thorough examination of the atomic defect formation and secondary effect of surface cleaning observed in this study would help develop engineering methods for graphene and other two-dimensional materials in the future.
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Affiliation(s)
- Naohiro Kadoguchi
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan
- Department
of Materials Science, Graduate School of Engineering, Tohoku University, Aramaki
Aza Aoba 6-6-02, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Yuuki Uesugi
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan
- PRESTO, Japan
Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan
| | - Makoto Nagasako
- Institute
for Materials Research, Tohoku University, Katahira 2-1-1,
Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Tetsuro Kobayashi
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan
- Department
of Materials Science, Graduate School of Engineering, Tohoku University, Aramaki
Aza Aoba 6-6-02, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Yuichi Kozawa
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Shunichi Sato
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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22
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Rathi P, Gupta P, Debnath A, Baldi H, Wang Y, Gupta R, Raman B, Singamaneni S. Plasmon-Enhanced Expansion Microscopy. NANO LETTERS 2023. [PMID: 37307329 DOI: 10.1021/acs.nanolett.3c01256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Expansion microscopy (ExM) is a rapidly emerging super-resolution microscopy technique that involves isotropic expansion of biological samples to improve spatial resolution. However, fluorescence signal dilution due to volumetric expansion is a hindrance to the widespread application of ExM. Here, we introduce plasmon-enhanced expansion microscopy (p-ExM) by harnessing an ultrabright fluorescent nanoconstruct, called plasmonic-fluor (PF), as a nanolabel. The unique structure of PFs renders nearly 15000-fold brighter fluorescence signal intensity and higher fluorescence retention following the ExM protocol (nearly 76%) compared to their conventional counterparts (<16% for IR-650). Individual PFs can be easily imaged using conventional fluorescence microscopes, making them excellent "digital" labels for ExM. We demonstrate that p-ExM enables improved tracing and decrypting of neural networks labeled with PFs, as evidenced by improved quantification of morphological markers (nearly a 2.5-fold increase in number of neurite terminal points). Overall, p-ExM complements the existing ExM techniques for probing structure-function relationships of various biological systems.
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Affiliation(s)
- Priya Rathi
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Prashant Gupta
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Avishek Debnath
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Harsh Baldi
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Yixuan Wang
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Rohit Gupta
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Baranidharan Raman
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Srikanth Singamaneni
- Department of Mechanical Engineering and Materials Science, and Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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23
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Tang M, Han Y, Jia D, Yang Q, Cheng JX. Far-field super-resolution chemical microscopy. LIGHT, SCIENCE & APPLICATIONS 2023; 12:137. [PMID: 37277396 DOI: 10.1038/s41377-023-01182-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/08/2023] [Accepted: 05/10/2023] [Indexed: 06/07/2023]
Abstract
Far-field chemical microscopy providing molecular electronic or vibrational fingerprint information opens a new window for the study of three-dimensional biological, material, and chemical systems. Chemical microscopy provides a nondestructive way of chemical identification without exterior labels. However, the diffraction limit of optics hindered it from discovering more details under the resolution limit. Recent development of super-resolution techniques gives enlightenment to open this door behind far-field chemical microscopy. Here, we review recent advances that have pushed the boundary of far-field chemical microscopy in terms of spatial resolution. We further highlight applications in biomedical research, material characterization, environmental study, cultural heritage conservation, and integrated chip inspection.
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Affiliation(s)
- Mingwei Tang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- Intelligent Perception Research Institute, Zhejiang Lab, Hangzhou, 311100, China
| | - Yubing Han
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Danchen Jia
- Department of Biomedical Engineering, Department of Electrical and Computer Engineering, Photonics Center, Boston University, Boston, MA, 02459, USA
| | - Qing Yang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- Intelligent Perception Research Institute, Zhejiang Lab, Hangzhou, 311100, China
| | - Ji-Xin Cheng
- Department of Biomedical Engineering, Department of Electrical and Computer Engineering, Photonics Center, Boston University, Boston, MA, 02459, USA.
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24
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Sandberg E, Piguet J, Kostiv U, Baryshnikov G, Liu H, Widengren J. Photoisomerization of Heptamethine Cyanine Dyes Results in Red-Emissive Species: Implications for Near-IR, Single-Molecule, and Super-Resolution Fluorescence Spectroscopy and Imaging. J Phys Chem B 2023; 127:3208-3222. [PMID: 37011608 PMCID: PMC10108366 DOI: 10.1021/acs.jpcb.2c08016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Photoisomerization kinetics of the near-infrared (NIR) fluorophore Sulfo-Cyanine7 (SCy7) was studied by a combination of fluorescence correlation spectroscopy (FCS) and transient state (TRAST) excitation modulation spectroscopy. A photoisomerized state with redshifted emission was identified, with kinetics consistent with a three-state photoisomerization model. Combining TRAST excitation modulation with spectrofluorimetry (spectral-TRAST) further confirmed an excitation-induced redshift in the emission spectrum of SCy7. We show how this red-emissive photoisomerized state contributes to the blinking kinetics in different emission bands of NIR cyanine dyes, and how it can influence single-molecule, super-resolution, as well as Förster resonance energy transfer (FRET) and multicolor readouts. Since this state can also be populated at moderate excitation intensities, it can also more broadly influence fluorescence readouts, also readouts not relying on high excitation conditions. However, this additional red-emissive state and its photodynamics, as identified and characterized in this work, can also be used as a strategy to push the emission of NIR cyanine dyes further into the NIR and to enhance photosensitization of nanoparticles with absorption spectra further into the NIR. Finally, we show that the photoisomerization kinetics of SCy7 and the formation of its redshifted photoisomer depend strongly on local environmental conditions, such as viscosity, polarity, and steric constraints, which suggests the use of SCy7 and other NIR cyanine dyes as environmental sensors. Such environmental information can be monitored by TRAST, in the NIR, with low autofluorescence and scattering conditions and on a broad range of samples and experimental conditions.
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Affiliation(s)
- Elin Sandberg
- Experimental Biomolecular Physics, Dept. Applied Physics, Royal Institute of Technology (KTH), Albanova Univ Center, 106 91 Stockholm, Sweden
| | - Joachim Piguet
- Experimental Biomolecular Physics, Dept. Applied Physics, Royal Institute of Technology (KTH), Albanova Univ Center, 106 91 Stockholm, Sweden
| | - Uliana Kostiv
- Experimental Biomolecular Physics, Dept. Applied Physics, Royal Institute of Technology (KTH), Albanova Univ Center, 106 91 Stockholm, Sweden
| | - Glib Baryshnikov
- Dept. Science and Technology, Linköping University, Campus Norrköping, 601 74 Norrköping, Sweden
| | - Haichun Liu
- Experimental Biomolecular Physics, Dept. Applied Physics, Royal Institute of Technology (KTH), Albanova Univ Center, 106 91 Stockholm, Sweden
| | - Jerker Widengren
- Experimental Biomolecular Physics, Dept. Applied Physics, Royal Institute of Technology (KTH), Albanova Univ Center, 106 91 Stockholm, Sweden
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25
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Kitamura A, Tornmalm J, Demirbay B, Piguet J, Kinjo M, Widengren J. Trans-cis isomerization kinetics of cyanine dyes reports on the folding states of exogeneous RNA G-quadruplexes in live cells. Nucleic Acids Res 2023; 51:e27. [PMID: 36651281 PMCID: PMC10018373 DOI: 10.1093/nar/gkac1255] [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: 03/24/2021] [Revised: 11/23/2022] [Accepted: 12/19/2022] [Indexed: 01/19/2023] Open
Abstract
Guanine (G)-rich nucleic acids are prone to assemble into four-stranded structures, so-called G-quadruplexes. Abnormal GGGGCC repeat elongations, and in particular their folding states, are associated with amyotrophic lateral sclerosis and frontotemporal dementia. Due to methodological constraints however, most studies of G quadruplex structures are restricted to in vitro conditions. Evidence of how GGGGCC repeats form into G-quadruplexes in vivo is sparse. We devised a readout strategy, exploiting the sensitivity of trans-cis isomerization of cyanine dyes to local viscosity and sterical constraints. Thereby, folding states of cyanine-labeled RNA, and in particular G-quadruplexes, can be identified in a sensitive manner. The isomerization kinetics, monitored via fluorescence blinking generated upon transitions between a fluorescent trans isomer and a non-fluorescent cis isomer, was first characterized for RNA with GGGGCC repeats in aqueous solution using fluorescence correlation spectroscopy and transient state (TRAST) monitoring. With TRAST, monitoring the isomerization kinetics from how the average fluorescence intensity varies with laser excitation modulation characteristics, we could then detect folding states of fluorescently tagged RNA introduced into live cells.
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Affiliation(s)
| | | | - Baris Demirbay
- Experimental Biomolecular Physics, Department of Applied Physics, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Joachim Piguet
- Experimental Biomolecular Physics, Department of Applied Physics, Royal Institute of Technology (KTH), Stockholm, Sweden
| | - Masataka Kinjo
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, Japan
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26
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Sun N, Jia Y, Bai S, Li Q, Dai L, Li J. The power of super-resolution microscopy in modern biomedical science. Adv Colloid Interface Sci 2023; 314:102880. [PMID: 36965225 DOI: 10.1016/j.cis.2023.102880] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/08/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023]
Abstract
Super-resolution microscopy (SRM) technology that breaks the diffraction limit has revolutionized the field of cell biology since its appearance, which enables researchers to visualize cellular structures with nanometric resolution, multiple colors and single-molecule sensitivity. With the flourishing development of hardware and the availability of novel fluorescent probes, the impact of SRM has already gone beyond cell biology and extended to nanomedicine, material science and nanotechnology, and remarkably boosted important breakthroughs in these fields. In this review, we will mainly highlight the power of SRM in modern biomedical science, discussing how these SRM techniques revolutionize the way we understand cell structures, biomaterials assembly and how assembled biomaterials interact with cellular organelles, and finally their promotion to the clinical pre-diagnosis. Moreover, we also provide an outlook on the current technical challenges and future improvement direction of SRM. We hope this review can provide useful information, inspire new ideas and propel the development both from the perspective of SRM techniques and from the perspective of SRM's applications.
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Affiliation(s)
- Nan Sun
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049
| | - Yi Jia
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Shiwei Bai
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049
| | - Qi Li
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences, Beijing 100190, China
| | - Luru Dai
- Wenzhou Institute and Wenzhou Key Laboratory of Biophysics, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049.
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27
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Wu G, Zhou Y, Hong M. Sub-50 nm optical imaging in ambient air with 10× objective lens enabled by hyper-hemi-microsphere. LIGHT, SCIENCE & APPLICATIONS 2023; 12:49. [PMID: 36854662 PMCID: PMC9974943 DOI: 10.1038/s41377-023-01091-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 01/05/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Optical microsphere nanoscope has great potential in the inspection of integrated circuit chips for semiconductor industry and morphological characterization in biology due to its superior resolving power and label-free characteristics. However, its resolution in ambient air is restricted by the magnification and numerical aperture (NA) of microsphere. High magnification objective lens is required to be coupled with microsphere for nano-imaging beyond the diffraction limit. To overcome these challenges, in this work, high refractive index hyper-hemi-microspheres with tunable magnification up to 10× are proposed and realized by accurately tailoring their thickness with focused ion beam (FIB) milling. The effective refractive index is put forward to guide the design of hyper-hemi-microspheres. Experiments demonstrate that the imaging resolution and contrast of a hyper-hemi-microsphere with a higher magnification and larger NA excel those of a microsphere in air. Besides, the hyper-hemi-microsphere could resolve ~50 nm feature with higher image fidelity and contrast compared with liquid immersed high refractive index microspheres. With a hyper-hemi-microsphere composed microscale compound lens configuration, sub-50 nm optical imaging in ambient air is realized by only coupling with a 10× objective lens (NA = 0.3), which enhances a conventional microscope imaging power about an order of magnitude.
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Affiliation(s)
- Guangxing Wu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117576, Singapore
| | - Yan Zhou
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117576, Singapore
- Peng Cheng Laboratory, Shenzhen, 518055, China
| | - Minghui Hong
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117576, Singapore.
- School of Aerospace Engineering, Xiamen University, Xiamen, 361005, China.
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28
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Wu D, Durán-Sampedro G, Fitzgerald S, Garre M, O'Shea DF. Double click macrocyclization with Sondheimer diyne of aza-dipyrrins for B-F ree bioorthogonal imaging. Chem Commun (Camb) 2023; 59:1951-1954. [PMID: 36722871 DOI: 10.1039/d2cc06461h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Sequential azide/diyne cycloadditions proved highly effective for the macrocyclization of a bis-azido aza-dipyrrin. Macrocyclic aza-dipyrrin could be produced in 30 min at rt in water with changes in fluorescence intensity and lifetimes measurable upon reaction. Live cell microscopy showed that aza-dipyrrins were suitable for confocal and STED super-resolution imaging and a bioorthogonal response to macrocyclization could be detected in cellular compartments. These results will encourage a broader examination of the sensing and imaging uses of aza-dipyrrins.
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Affiliation(s)
- Dan Wu
- Department of Chemistry, RCSI, 123 St Stephen's Green, Dublin 2, Ireland.
| | | | - Sheila Fitzgerald
- Department of Chemistry, RCSI, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Massimiliano Garre
- Department of Chemistry, RCSI, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Donal F O'Shea
- Department of Chemistry, RCSI, 123 St Stephen's Green, Dublin 2, Ireland.
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29
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Zhai R, Fang B, Lai Y, Peng B, Bai H, Liu X, Li L, Huang W. Small-molecule fluorogenic probes for mitochondrial nanoscale imaging. Chem Soc Rev 2023; 52:942-972. [PMID: 36514947 DOI: 10.1039/d2cs00562j] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mitochondria are inextricably linked to the development of diseases and cell metabolism disorders. Super-resolution imaging (SRI) is crucial in enhancing our understanding of mitochondrial ultrafine structures and functions. In addition to high-precision instruments, super-resolution microscopy relies heavily on fluorescent materials with unique photophysical properties. Small-molecule fluorogenic probes (SMFPs) have excellent properties that make them ideal for mitochondrial SRI. This paper summarizes recent advances in the field of SMFPs, with a focus on the chemical and spectroscopic properties required for mitochondrial SRI. Finally, we discuss future challenges in this field, including the design principles of SMFPs and nanoscopic techniques.
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Affiliation(s)
- Rongxiu Zhai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China.
| | - Bin Fang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China. .,School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Yaqi Lai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China.
| | - Bo Peng
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China.
| | - Hua Bai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China.
| | - Xiaowang Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China.
| | - Lin Li
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China. .,The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, Fujian, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, Xi'an 710072, China. .,The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, Fujian, China
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30
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Samanta K, Ahmad A, Tinguely JC, Ahluwalia BS, Joseph J. Transmission structured illumination microscopy with tunable frequency illumination using tilt mirror assembly. Sci Rep 2023; 13:1453. [PMID: 36702876 PMCID: PMC9879979 DOI: 10.1038/s41598-023-27814-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023] Open
Abstract
We present experimental demonstration of tilt-mirror assisted transmission structured illumination microscopy (tSIM) that offers a large field of view super resolution imaging. An assembly of custom-designed tilt-mirrors are employed as the illumination module where the sample is excited with the interference of two beams reflected from the opposite pair of mirror facets. Tunable frequency structured patterns are generated by changing the mirror-tilt angle and the hexagonal-symmetric arrangement is considered for the isotropic resolution in three orientations. Utilizing high numerical aperture (NA) objective in standard SIM provides super-resolution compromising with the field-of-view (FOV). Employing low NA (20X/0.4) objective lens detection, we experimentally demonstrate [Formula: see text] (0.56 mm[Formula: see text]0.35 mm) size single FOV image with [Formula: see text]1.7- and [Formula: see text]2.4-fold resolution improvement (exploiting various illumination by tuning tilt-mirrors) over the diffraction limit. The results are verified both for the fluorescent beads as well as biological samples. The tSIM geometry decouples the illumination and the collection light paths consequently enabling free change of the imaging objective lens without influencing the spatial frequency of the illumination pattern that are defined by the tilt-mirrors. The large and scalable FOV supported by tSIM will find usage for applications where scanning large areas are necessary as in pathology and applications where images must be correlated both in space and time.
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Affiliation(s)
- Krishnendu Samanta
- grid.417967.a0000 0004 0558 8755Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016 India ,grid.10919.300000000122595234Department of Physics and Technology, UiT-The Arctic University of Norway, 9037 Tromsö, Norway
| | - Azeem Ahmad
- grid.10919.300000000122595234Department of Physics and Technology, UiT-The Arctic University of Norway, 9037 Tromsö, Norway
| | - Jean-Claude Tinguely
- grid.10919.300000000122595234Department of Physics and Technology, UiT-The Arctic University of Norway, 9037 Tromsö, Norway
| | - Balpreet Singh Ahluwalia
- grid.10919.300000000122595234Department of Physics and Technology, UiT-The Arctic University of Norway, 9037 Tromsö, Norway
| | - Joby Joseph
- grid.417967.a0000 0004 0558 8755Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016 India ,grid.417967.a0000 0004 0558 8755Optics and Photonics Centre, Indian Institute of Technology Delhi, New Delhi, 110016 India
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31
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Sandberg E, Piguet J, Liu H, Widengren J. Combined Fluorescence Fluctuation and Spectrofluorometric Measurements Reveal a Red-Shifted, Near-IR Emissive Photo-Isomerized Form of Cyanine 5. Int J Mol Sci 2023; 24:ijms24031990. [PMID: 36768309 PMCID: PMC9916991 DOI: 10.3390/ijms24031990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/21/2023] Open
Abstract
Cyanine fluorophores are extensively used in fluorescence spectroscopy and imaging. Upon continuous excitation, especially at excitation conditions used in single-molecule and super-resolution experiments, photo-isomerized states of cyanines easily reach population probabilities of around 50%. Still, effects of photo-isomerization are largely ignored in such experiments. Here, we studied the photo-isomerization of the pentamethine cyanine 5 (Cy5) by two similar, yet complementary means to follow fluorophore blinking dynamics: fluorescence correlation spectroscopy (FCS) and transient-state (TRAST) excitation-modulation spectroscopy. Additionally, we combined TRAST and spectrofluorimetry (spectral-TRAST), whereby the emission spectra of Cy5 were recorded upon different rectangular pulse-train excitations. We also developed a framework for analyzing transitions between multiple emissive states in FCS and TRAST experiments, how the brightness of the different states is weighted, and what initial conditions that apply. Our FCS, TRAST, and spectral-TRAST experiments showed significant differences in dark-state relaxation amplitudes for different spectral detection ranges, which we attribute to an additional red-shifted, emissive photo-isomerized state of Cy5, not previously considered in FCS and single-molecule experiments. The photo-isomerization kinetics of this state indicate that it is formed under moderate excitation conditions, and its population and emission may thus deserve also more general consideration in fluorescence imaging and spectroscopy experiments.
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32
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Affiliation(s)
- Jinrun Dong
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
| | - Jiandong Feng
- Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
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33
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Li Y, Niu Y, Kong C, Yang Z, Qu J. Theoretical insight on the saturated stimulated emission intensity of a squaraine dye for STED nanoscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 284:121793. [PMID: 36067625 DOI: 10.1016/j.saa.2022.121793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Stimulated emission depletion nanoscopy (STED) is increasingly applied for the insights into the ultra-structures of organelles in live cells because of the bypassing of the Abbe's optical diffraction limit. Theoretically, with the increase of excitation and depletion laser power, the imaging resolution can be accordingly enhanced and even close to the infinity. Unfortunately, powerful laser illuminations usually produce severe phototoxicity and photobleaching, which will lead to more extra-interference with biological events in live cells and accelerate the decomposition of the fluorescent probes. In view of the trade-off of cell viability and imaging resolution, excellent probes with superior photophysical properties are great in demand. For a qualified STED probes, the saturated stimulated emission intensity (Isat) is considered as a key evaluating factor. According to the formula, Isat is inversely proportional to the stimulated emission cross section (σsti) of the fluorescent probe. However, the relationship between the σsti and chemical structure of the STED probe remain to be unclear. In this work, we explore the influence factors by theoretical calculations on a squaraine dye (MitoEsq-635) and a commercial dye (Atto647N). The results indicate that the increase of transition dipole moment (μ) are beneficial for the increase of σsti, thereafter reducing Isat. Furthermore, we firstly proposed that stimulated emission depletion was qualitatively interpreted by the investigation on the potential energy surfaces of ground states (S0) and the first excited states (S1) of the dyes.
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Affiliation(s)
- Yuan Li
- Center for Biomedical Optics and Photonics & College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
| | - Yingli Niu
- Department of Physics School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Chuipeng Kong
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, China
| | - Zhigang Yang
- Center for Biomedical Optics and Photonics & College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China.
| | - Junle Qu
- Center for Biomedical Optics and Photonics & College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
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34
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He Y, Yao Y, He Y, Huang Z, Luo F, Zhang C, Qi D, Jia T, Wang Z, Sun Z, Yuan X, Zhang S. Surpassing the resolution limitation of structured illumination microscopy by an untrained neural network. BIOMEDICAL OPTICS EXPRESS 2023; 14:106-117. [PMID: 36698670 PMCID: PMC9842007 DOI: 10.1364/boe.479621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/01/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Structured illumination microscopy (SIM), as a flexible tool, has been widely applied to observing subcellular dynamics in live cells. It is noted, however, that SIM still encounters a problem with theoretical resolution limitation being only twice over wide-field microscopy, where imaging of finer biological structures and dynamics are significantly constrained. To surpass the resolution limitation of SIM, we developed an image postprocessing method to further improve the lateral resolution of SIM by an untrained neural network, i.e., deep resolution-enhanced SIM (DRE-SIM). DRE-SIM can further extend the spatial frequency components of SIM by employing the implicit priors based on the neural network without training datasets. The further super-resolution capability of DRE-SIM is verified by theoretical simulations as well as experimental measurements. Our experimental results show that DRE-SIM can achieve the resolution enhancement by a factor of about 1.4 compared with conventional SIM. Given the advantages of improving the lateral resolution while keeping the imaging speed, DRE-SIM will have a wide range of applications in biomedical imaging, especially when high-speed imaging mechanisms are integrated into the conventional SIM system.
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Affiliation(s)
- Yu He
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
- Contributed equally
| | - Yunhua Yao
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
- Contributed equally
| | - Yilin He
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Zhengqi Huang
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Fan Luo
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Chonglei Zhang
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Dalong Qi
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Tianqing Jia
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Zhiyong Wang
- School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Xiaocong Yuan
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Shian Zhang
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
- Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
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35
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Cong Y, Baimanov D, Zhou Y, Chen C, Wang L. Penetration and translocation of functional inorganic nanomaterials into biological barriers. Adv Drug Deliv Rev 2022; 191:114615. [PMID: 36356929 DOI: 10.1016/j.addr.2022.114615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/23/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022]
Abstract
With excellent physicochemical properties, inorganic nanomaterials (INMs) have exhibited a series of attractive applications in biomedical fields. Biological barriers prevent successful delivery of nanomedicine in living systems that limits the development of nanomedicine especially for sufficient delivery of drugs and effective therapy. Numerous researches have focused on overcoming these biological barriers and homogeneity of organisms to enhance therapeutic efficacy, however, most of these strategies fail to resolve these challenges. In this review, we present the latest progress about how INMs interact with biological barriers and penetrate these barriers. We also summarize that both native structure and components of biological barriers and physicochemical properties of INMs contributed to the penetration capacity. Knowledge about the relationship between INMs structure and penetration capacity will guide the design and application of functional and efficient nanomedicine in the future.
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Affiliation(s)
- Yalin Cong
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China & Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China
| | - Didar Baimanov
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China & Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, PR China
| | - Yunlong Zhou
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, PR China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China & Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; GBA Research Innovation Institute for Nanotechnology, Guangzhou 510700, Guangdong, PR China; Research Unit of Nanoscience and Technology, Chinese Academy of Medical Sciences, Beijing 100730, PR China
| | - Liming Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China & Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China.
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36
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Butola A, Acuna S, Hansen DH, Agarwal K. Scalable-resolution structured illumination microscopy. OPTICS EXPRESS 2022; 30:43752-43767. [PMID: 36523067 DOI: 10.1364/oe.465303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/12/2022] [Indexed: 06/17/2023]
Abstract
Structured illumination microscopy suffers from the need of sophisticated instrumentation and precise calibration. This makes structured illumination microscopes costly and skill-dependent. We present a novel approach to realize super-resolution structured illumination microscopy using an alignment non-critical illumination system and a reconstruction algorithm that does not need illumination information. The optical system is designed to encode higher order frequency components of the specimen by projecting PSF-modulated binary patterns for illuminating the sample plane, which do not have clean Fourier peaks conventionally used in structured illumination microscopy. These patterns fold high frequency content of sample into the measurements in an obfuscated manner, which are de-obfuscated using multiple signal classification algorithm. This algorithm eliminates the need of clean peaks in illumination and the knowledge of illumination patterns, which makes instrumentation simple and flexible for use with a variety of microscope objective lenses. We present a variety of experimental results on beads and cell samples to demonstrate resolution enhancement by a factor of 2.6 to 3.4 times, which is better than the enhancement supported by the conventional linear structure illumination microscopy where the same objective lens is used for structured illumination as well as collection of light. We show that the same system can be used in SIM configuration with different collection objective lenses without any careful re-calibration or realignment, thereby supporting a range of resolutions with the same system.
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Pu R, Zhan Q, Peng X, Liu S, Guo X, Liang L, Qin X, Zhao ZW, Liu X. Super-resolution microscopy enabled by high-efficiency surface-migration emission depletion. Nat Commun 2022; 13:6636. [PMID: 36333290 PMCID: PMC9636245 DOI: 10.1038/s41467-022-33726-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
Nonlinear depletion of fluorescence states by stimulated emission constitutes the basis of stimulated emission depletion (STED) microscopy. Despite significant efforts over the past decade, achieving super-resolution at low saturation intensities by STED remains a major technical challenge. By harnessing the surface quenching effect in NaGdF4:Yb/Tm nanocrystals, we report here high-efficiency emission depletion through surface migration. Using a dual-beam, continuous-wave laser manipulation scheme (975-nm excitation and 730-nm de-excitation), we achieved an emission depletion efficiency of over 95% and a low saturation intensity of 18.3 kW cm-2. Emission depletion by surface migration through gadolinium sublattices enables super-resolution imaging with sub-20 nm lateral resolution. Our approach circumvents the fundamental limitation of high-intensity STED microscopy, providing autofluorescence-free, re-excitation-background-free imaging with a saturation intensity over three orders of magnitude lower than conventional fluorophores. We also demonstrated super-resolution imaging of actin filaments in Hela cells labeled with 8-nm nanoparticles. Combined with the highly photostable lanthanide luminescence, surface-migration emission depletion (SMED) could provide a powerful mechanism for low-power, super-resolution imaging or biological tracking as well as super-resolved optical sensing/writing and lithography.
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Affiliation(s)
- Rui Pu
- grid.263785.d0000 0004 0368 7397Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 P. R. China
| | - Qiuqiang Zhan
- grid.263785.d0000 0004 0368 7397Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 P. R. China ,grid.263785.d0000 0004 0368 7397National Center for International Research on Green Optoelectronics, Guangdong Engineering Research Centre of Optoelectronic Intelligent Information Perception, South China Normal University, Guangzhou, 510006 P. R. China ,grid.263785.d0000 0004 0368 7397MOE Key laboratory & Guangdong Provincial Key laboratory of Laser Life Science, South China Normal University, Guangzhou, 510631 P. R. China
| | - Xingyun Peng
- grid.263785.d0000 0004 0368 7397Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 P. R. China
| | - Siying Liu
- grid.263785.d0000 0004 0368 7397Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 P. R. China
| | - Xin Guo
- grid.263785.d0000 0004 0368 7397Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 P. R. China
| | - Liangliang Liang
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Xian Qin
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Ziqing Winston Zhao
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore ,grid.4280.e0000 0001 2180 6431Centre for BioImaging Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117557 Singapore ,grid.4280.e0000 0001 2180 6431Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411 Singapore
| | - Xiaogang Liu
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore ,grid.4280.e0000 0001 2180 6431The N.1 Institute for Health, National University of Singapore, Singapore, 117456 Singapore
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38
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Liu X, Jiang Y, Cui Y, Yuan J, Fang X. Deep learning in single-molecule imaging and analysis: recent advances and prospects. Chem Sci 2022; 13:11964-11980. [PMID: 36349113 PMCID: PMC9600384 DOI: 10.1039/d2sc02443h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 09/19/2022] [Indexed: 09/19/2023] Open
Abstract
Single-molecule microscopy is advantageous in characterizing heterogeneous dynamics at the molecular level. However, there are several challenges that currently hinder the wide application of single molecule imaging in bio-chemical studies, including how to perform single-molecule measurements efficiently with minimal run-to-run variations, how to analyze weak single-molecule signals efficiently and accurately without the influence of human bias, and how to extract complete information about dynamics of interest from single-molecule data. As a new class of computer algorithms that simulate the human brain to extract data features, deep learning networks excel in task parallelism and model generalization, and are well-suited for handling nonlinear functions and extracting weak features, which provide a promising approach for single-molecule experiment automation and data processing. In this perspective, we will highlight recent advances in the application of deep learning to single-molecule studies, discuss how deep learning has been used to address the challenges in the field as well as the pitfalls of existing applications, and outline the directions for future development.
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Affiliation(s)
- Xiaolong Liu
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yifei Jiang
- Institute of Basic Medicine and Cancer, Chinese Academy of Sciences Hangzhou 310022 Zhejiang China
| | - Yutong Cui
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jinghe Yuan
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Xiaohong Fang
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Institute of Basic Medicine and Cancer, Chinese Academy of Sciences Hangzhou 310022 Zhejiang China
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39
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Fernandez A, Kielland N, Makda A, Carragher NO, González-García MC, Espinar-Barranco L, González-Vera JA, Orte A, Lavilla R, Vendrell M. A multicomponent reaction platform towards multimodal near-infrared BODIPY dyes for STED and fluorescence lifetime imaging. RSC Chem Biol 2022; 3:1251-1259. [PMID: 36320886 PMCID: PMC9533399 DOI: 10.1039/d2cb00168c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/25/2022] [Indexed: 11/07/2023] Open
Abstract
We report a platform combining multicomponent reaction synthesis and automated cell-based screening to develop biocompatible NIR-BODIPY fluorophores. From a library of over 60 fluorophores, we optimised compound NIRBD-62c as a multimodal probe with suitable properties for STED super-resolution and fluorescence lifetime imaging. Furthermore, we employed NIRBD-62c for imaging trafficking inside cells and to examine how pharmacological inhibitors can alter the vesicular traffic between intracellular compartments and the plasma membrane.
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Affiliation(s)
- Antonio Fernandez
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
- Dpt Organic Chemistry, Faculty of Chemistry, University of Murcia Spain
| | - Nicola Kielland
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy and Institute of Biomedicine (IBUB), University of Barcelona Spain
| | - Ashraff Makda
- Institute of Genetics and Cancer, The University of Edinburgh Edinburgh UK
| | - Neil O Carragher
- Institute of Genetics and Cancer, The University of Edinburgh Edinburgh UK
| | | | | | - Juan A González-Vera
- Nanoscopy-UGR Laboratory, Facultad de Farmacia, Universidad de Granada Granada Spain
| | - Angel Orte
- Nanoscopy-UGR Laboratory, Facultad de Farmacia, Universidad de Granada Granada Spain
| | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy and Institute of Biomedicine (IBUB), University of Barcelona Spain
| | - Marc Vendrell
- Centre for Inflammation Research, The University of Edinburgh Edinburgh UK
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40
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Elasticity regulates nanomaterial transport as delivery vehicles: Design, characterization, mechanisms and state of the art. Biomaterials 2022; 291:121879. [DOI: 10.1016/j.biomaterials.2022.121879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/14/2022] [Accepted: 10/23/2022] [Indexed: 11/22/2022]
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41
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Li W, Kaminski Schierle GS, Lei B, Liu Y, Kaminski CF. Fluorescent Nanoparticles for Super-Resolution Imaging. Chem Rev 2022; 122:12495-12543. [PMID: 35759536 PMCID: PMC9373000 DOI: 10.1021/acs.chemrev.2c00050] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Super-resolution imaging techniques that overcome the diffraction limit of light have gained wide popularity for visualizing cellular structures with nanometric resolution. Following the pace of hardware developments, the availability of new fluorescent probes with superior properties is becoming ever more important. In this context, fluorescent nanoparticles (NPs) have attracted increasing attention as bright and photostable probes that address many shortcomings of traditional fluorescent probes. The use of NPs for super-resolution imaging is a recent development and this provides the focus for the current review. We give an overview of different super-resolution methods and discuss their demands on the properties of fluorescent NPs. We then review in detail the features, strengths, and weaknesses of each NP class to support these applications and provide examples from their utilization in various biological systems. Moreover, we provide an outlook on the future of the field and opportunities in material science for the development of probes for multiplexed subcellular imaging with nanometric resolution.
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Affiliation(s)
- Wei Li
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China,Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
| | | | - Bingfu Lei
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China,B. Lei.
| | - Yingliang Liu
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China
| | - Clemens F. Kaminski
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom,C. F. Kaminski.
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42
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Shen X, Wang L, Li W, Wang H, Zhou H, Zhu Y, Yan W, Qu J. Ultralow Laser Power Three-Dimensional Superresolution Microscopy Based on Digitally Enhanced STED. BIOSENSORS 2022; 12:bios12070539. [PMID: 35884342 PMCID: PMC9351679 DOI: 10.3390/bios12070539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 01/27/2023]
Abstract
The resolution of optical microscopes is limited by the optical diffraction limit; in particular, the axial resolution is much lower than the lateral resolution, which hinders the clear distinction of the three-dimensional (3D) structure of cells. Although stimulated emission depletion (STED) superresolution microscopy can break through the optical diffraction limit to achieve 3D superresolution imaging, traditional 3D STED requires high depletion laser power to acquire high-resolution images, which can cause irreversible light damage to biological samples and probes. Therefore, we developed an ultralow laser power 3D STED superresolution imaging method. On the basis of this method, we obtained lateral and axial resolutions of 71 nm and 144 nm, respectively, in fixed cells with 0.65 mW depletion laser power. This method will have broad application prospects in 3D superresolution imaging of living cells.
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43
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Lee M, Joo S. Effect of time‐gating on stimulated emission depletion microscopy using sub‐nanosecond pulses. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mina Lee
- Safety Measurement Institute Korea Research Institute of Standards and Science (KRISS) Daejeon South Korea
| | - Sihwa Joo
- Safety Measurement Institute Korea Research Institute of Standards and Science (KRISS) Daejeon South Korea
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44
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Bergstrand J, Miao X, Srambickal CV, Auer G, Widengren J. Fast, streamlined fluorescence nanoscopy resolves rearrangements of SNARE and cargo proteins in platelets co-incubated with cancer cells. J Nanobiotechnology 2022; 20:292. [PMID: 35729633 PMCID: PMC9210740 DOI: 10.1186/s12951-022-01502-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 06/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Increasing evidence suggests that platelets play a central role in cancer progression, with altered storage and selective release from platelets of specific tumor-promoting proteins as a major mechanism. Fluorescence-based super-resolution microscopy (SRM) can resolve nanoscale spatial distribution patterns of such proteins, and how they are altered in platelets upon different activations. Analysing such alterations by SRM thus represents a promising, minimally invasive strategy for platelet-based diagnosis and monitoring of cancer progression. However, broader applicability beyond specialized research labs will require objective, more automated imaging procedures. Moreover, for statistically significant analyses many SRM platelet images are needed, of several different platelet proteins. Such proteins, showing alterations in their distributions upon cancer progression additionally need to be identified. RESULTS A fast, streamlined and objective procedure for SRM platelet image acquisition, analysis and classification was developed to overcome these limitations. By stimulated emission depletion SRM we imaged nanoscale patterns of six different platelet proteins; four different SNAREs (soluble N-ethylmaleimide factor attachment protein receptors) mediating protein secretion by membrane fusion of storage granules, and two angiogenesis regulating proteins, representing cargo proteins within these granules coupled to tumor progression. By a streamlined procedure, we recorded about 100 SRM images of platelets, for each of these six proteins, and for five different categories of platelets; incubated with cancer cells (MCF-7, MDA-MB-231, EFO-21), non-cancer cells (MCF-10A), or no cells at all. From these images, structural similarity and protein cluster parameters were determined, and probability functions of these parameters were generated for the different platelet categories. By comparing these probability functions between the categories, we could identify nanoscale alterations in the protein distributions, allowing us to classify the platelets into their correct categories, if they were co-incubated with cancer cells, non-cancer cells, or no cells at all. CONCLUSIONS The fast, streamlined and objective acquisition and analysis procedure established in this work confirms the role of SNAREs and angiogenesis-regulating proteins in platelet-mediated cancer progression, provides additional fundamental knowledge on the interplay between tumor cells and platelets, and represent an important step towards using tumor-platelet interactions and redistribution of nanoscale protein patterns in platelets as a basis for cancer diagnostics.
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Affiliation(s)
- Jan Bergstrand
- Department of Applied Physics, Experimental Biomolecular Physics, Albanova Univ Center, Royal Institute of Technology (KTH), 106 91, Stockholm, Sweden
| | - Xinyan Miao
- Department of Applied Physics, Experimental Biomolecular Physics, Albanova Univ Center, Royal Institute of Technology (KTH), 106 91, Stockholm, Sweden
| | - Chinmaya Venugopal Srambickal
- Department of Applied Physics, Experimental Biomolecular Physics, Albanova Univ Center, Royal Institute of Technology (KTH), 106 91, Stockholm, Sweden
| | - Gert Auer
- Department of Oncology-Pathology, K7, Z1:00, Karolinska University Hospital, Karolinska Institutet, 171 76, Stockholm, Sweden
| | - Jerker Widengren
- Department of Applied Physics, Experimental Biomolecular Physics, Albanova Univ Center, Royal Institute of Technology (KTH), 106 91, Stockholm, Sweden.
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45
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Valdez S, Robertson M, Qiang Z. Fluorescence Resonance Energy Transfer Measurements in Polymer Science: A Review. Macromol Rapid Commun 2022; 43:e2200421. [PMID: 35689335 DOI: 10.1002/marc.202200421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/06/2022] [Indexed: 12/27/2022]
Abstract
Fluorescence resonance energy transfer (FRET) is a non-invasive characterization method for studying molecular structures and dynamics, providing high spatial resolution at nanometer scale. Over the past decades, FRET-based measurements are developed and widely implemented in synthetic polymer systems for understanding and detecting a variety of nanoscale phenomena, enabling significant advances in polymer science. In this review, the basic principles of fluorescence and FRET are briefly discussed. Several representative research areas are highlighted, where FRET spectroscopy and imaging can be employed to reveal polymer morphology and kinetics. These examples include understanding polymer micelle formation and stability, detecting guest molecule release from polymer host, characterizing supramolecular assembly, imaging composite interfaces, and determining polymer chain conformations and their diffusion kinetics. Finally, a perspective on the opportunities of FRET-based measurements is provided for further allowing their greater contributions in this exciting area.
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Affiliation(s)
- Sara Valdez
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Mark Robertson
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Zhe Qiang
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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46
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Guo X, Pu R, Zhu Z, Qiao S, Liang Y, Huang B, Liu H, Labrador-Páez L, Kostiv U, Zhao P, Wu Q, Widengren J, Zhan Q. Achieving low-power single-wavelength-pair nanoscopy with NIR-II continuous-wave laser for multi-chromatic probes. Nat Commun 2022; 13:2843. [PMID: 35606360 PMCID: PMC9126916 DOI: 10.1038/s41467-022-30114-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 04/06/2022] [Indexed: 12/26/2022] Open
Abstract
Stimulated emission depletion (STED) microscopy is a powerful diffraction-unlimited technique for fluorescence imaging. Despite its rapid evolution, STED fundamentally suffers from high-intensity light illumination, sophisticated probe-defined laser schemes, and limited photon budget of the probes. Here, we demonstrate a versatile strategy, stimulated-emission induced excitation depletion (STExD), to deplete the emission of multi-chromatic probes using a single pair of low-power, near-infrared (NIR), continuous-wave (CW) lasers with fixed wavelengths. With the effect of cascade amplified depletion in lanthanide upconversion systems, we achieve emission inhibition for a wide range of emitters (e.g., Nd3+, Yb3+, Er3+, Ho3+, Pr3+, Eu3+, Tm3+, Gd3+, and Tb3+) by manipulating their common sensitizer, i.e., Nd3+ ions, using a 1064-nm laser. With NaYF4:Nd nanoparticles, we demonstrate an ultrahigh depletion efficiency of 99.3 ± 0.3% for the 450 nm emission with a low saturation intensity of 23.8 ± 0.4 kW cm-2. We further demonstrate nanoscopic imaging with a series of multi-chromatic nanoprobes with a lateral resolution down to 34 nm, two-color STExD imaging, and subcellular imaging of the immunolabelled actin filaments. The strategy expounded here promotes single wavelength-pair nanoscopy for multi-chromatic probes and for multi-color imaging under low-intensity-level NIR-II CW laser depletion.
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Affiliation(s)
- Xin Guo
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Rui Pu
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Zhimin Zhu
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Shuqian Qiao
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Yusen Liang
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Bingru Huang
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Haichun Liu
- Experimental Biomolecular Physics, Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Lucía Labrador-Páez
- Experimental Biomolecular Physics, Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Uliana Kostiv
- Experimental Biomolecular Physics, Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Pu Zhao
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Qiusheng Wu
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Jerker Widengren
- Experimental Biomolecular Physics, Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91, Stockholm, Sweden
| | - Qiuqiang Zhan
- Centre for Optical and Electromagnetic Research, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China.
- MOE Key Laboratory and Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, P. R. China.
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47
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Li H, Warden AR, He J, Shen G, Ding X. Expansion microscopy with ninefold swelling (NIFS) hydrogel permits cellular ultrastructure imaging on conventional microscope. SCIENCE ADVANCES 2022; 8:eabm4006. [PMID: 35507653 PMCID: PMC9067917 DOI: 10.1126/sciadv.abm4006] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Superresolution microscopy enables probing of cellular ultrastructures. However, its widespread applications are limited by the need for expensive machinery, specific hardware, and sophisticated data processing. Expansion microscopy (ExM) improves the resolution of conventional microscopy by physically expanding biological specimens before imaging and currently provides ~70-nm resolution, which still lags behind that of modern superresolution microscopy (~30 nm). Here, we demonstrate a ninefold swelling (NIFS) hydrogel, that can reduce ExM resolution to 31 nm when using regular traditional microscopy. We also design a detachable chip that integrates all the experimental operations to facilitate the maximal reproducibility of this high-resolution imaging technology. We demonstrate this technique on the superimaging of nuclear pore complex and clathrin-coated pits, whose structures can hardly be resolved by conventional microscopy. The method presented here offers a universal platform with superresolution imaging to unveil cellular ultrastructural details using standard conventional laboratory microscopes.
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48
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A synergistic strategy to develop photostable and bright dyes with long Stokes shift for nanoscopy. Nat Commun 2022; 13:2264. [PMID: 35477933 PMCID: PMC9046415 DOI: 10.1038/s41467-022-29547-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 03/11/2022] [Indexed: 11/08/2022] Open
Abstract
The quality and application of super-resolution fluorescence imaging greatly lie in the dyes’ properties, including photostability, brightness, and Stokes shift. Here we report a synergistic strategy to simultaneously improve such properties of regular fluorophores. Introduction of quinoxaline motif with fine-tuned electron density to conventional rhodamines generates new dyes with vibration structure and inhibited twisted-intramolecular-charge-transfer (TICT) formation synchronously, thus increasing the brightness and photostability while enlarging Stokes shift. The new fluorophore YL578 exhibits around twofold greater brightness and Stokes shift than its parental fluorophore, Rhodamine B. Importantly, in Stimulated Emission Depletion (STED) microscopy, YL578 derived probe possesses a superior photostability and thus renders threefold more frames than carbopyronine based probes (CPY-Halo and 580CP-Halo), known as photostable fluorophores for STED imaging. Furthermore, the strategy is well generalized to offer a new class of bright and photostable fluorescent probes with long Stokes shift (up to 136 nm) for bioimaging and biosensing. Super-resolution microscopy is a powerful tool for cellular studies but requires bright and stable fluorescent probes. Here, the authors report on a strategy to introduce quinoxaline motifs to conventional probes to make them brighter, more photostable, larger Stokes shift, and demonstrate the probes for biosensing applications.
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49
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Xu Y, Dang D, Zhang N, Zhang J, Xu R, Wang Z, Zhou Y, Zhang H, Liu H, Yang Z, Meng L, Lam JWY, Tang BZ. Aggregation-Induced Emission (AIE) in Super-resolution Imaging: Cationic AIE Luminogens (AIEgens) for Tunable Organelle-Specific Imaging and Dynamic Tracking in Nanometer Scale. ACS NANO 2022; 16:5932-5942. [PMID: 35344346 DOI: 10.1021/acsnano.1c11125] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Organelle-specific imaging and dynamic tracking in ultrahigh resolution is essential for understanding their functions in biological research, but this remains a challenge. Therefore, a facile strategy by utilizing anion-π+ interactions is proposed here to construct an aggregation-induced emission luminogen (AIEgen) of DTPAP-P, not only restricting the intramolecular motions but also blocking their strong π-π interactions. DTPAP-P exhibits a high photoluminescence quantum yield (PLQY) of 35.04% in solids, favorable photostability and biocompatibility, indicating its potential application in super-resolution imaging (SRI) via stimulated emission depletion (STED) nanoscopy. It is also observed that this cationic DTPAP-P can specifically target to mitochondria or nucleus dependent on the cell status, resulting in tunable organelle-specific imaging in nanometer scale. In live cells, mitochondria-specific imaging and their dynamic monitoring (fission and fusion) can be obtained in ultrahigh resolution with a full-width-at-half-maximum (fwhm) value of only 165 nm by STED nanoscopy. This is about one-sixth of the fwhm value in confocal microscopy (1028 nm). However, a migration process occurs for fixed cells from mitochondria to nucleus under light activation (405 nm), leading to nucleus-targeted super-resolution imaging (fwhm= 184 nm). These findings indicate that tunable organelle-specific imaging and dynamic tracking by a single AIEgen at a superior resolution can be achieved in our case here via STED nanoscopy, thus providing an efficient method to further understand organelle's functions and roles in biological research.
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Affiliation(s)
- Yanzi Xu
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Dongfeng Dang
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Ning Zhang
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Jianyu Zhang
- Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, P. R. China
| | - Ruohan Xu
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Zhi Wang
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Yu Zhou
- Instrumental Analysis Center, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
- School of Physics, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Haoke Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 311215, P. R. China
| | - Haixiang Liu
- Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, P. R. China
| | - Zhiwei Yang
- School of Physics, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Lingjie Meng
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
- Instrumental Analysis Center, Xi'an Jiao Tong University, Xi'an 710049, P. R. China
| | - Jacky W Y Lam
- Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, P. R. China
| | - Ben Zhong Tang
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong Shenzhen, Shenzhen 518172, P. R. China
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50
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He Y, Yao Y, Qi D, Wang Z, Jia T, Liang J, Sun Z, Zhang S. High-speed super-resolution imaging with compressive imaging-based structured illumination microscopy. OPTICS EXPRESS 2022; 30:14287-14299. [PMID: 35473175 DOI: 10.1364/oe.453554] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Structured illumination microscopy (SIM) has been widely applied to investigating fine structures of biological samples by breaking the optical diffraction limitation. So far, video-rate imaging has been obtained in SIM, but the imaging speed was still limited due to the reconstruction of a super-solution image through multi-sampling, which hindered the applications in high-speed biomedical imaging. To overcome this limitation, here we develop compressive imaging-based structured illumination microscopy (CISIM) by synergizing SIM and compressive sensing (CS). Compared with conventional SIM, CISIM can greatly improve the super-resolution imaging speed by extracting multiple super-resolution images from one compressed image. Based on CISIM, we successfully reconstruct the super-resolution images in biological dynamics, and analyze the effect factors of image reconstruction quality, which verify the feasibility of CISIM. CISIM paves a way for high-speed super-resolution imaging, which may bring technological breakthroughs and significant applications in biomedical imaging.
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