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Otomo K, Omura T, Nozawa Y, Edwards SJ, Sato Y, Saito Y, Yagishita S, Uchida H, Watakabe Y, Naitou K, Yanai R, Sahara N, Takagi S, Katayama R, Iwata Y, Shiokawa T, Hayakawa Y, Otsuka K, Watanabe-Takano H, Haneda Y, Fukuhara S, Fujiwara M, Nii T, Meno C, Takeshita N, Yashiro K, Rosales Rocabado JM, Kaku M, Yamada T, Oishi Y, Koike H, Cheng Y, Sekine K, Koga JI, Sugiyama K, Kimura K, Karube F, Kim H, Manabe I, Nemoto T, Tainaka K, Hamada A, Brismar H, Susaki EA. descSPIM: an affordable and easy-to-build light-sheet microscope optimized for tissue clearing techniques. Nat Commun 2024; 15:4941. [PMID: 38866781 PMCID: PMC11169475 DOI: 10.1038/s41467-024-49131-1] [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: 11/06/2023] [Accepted: 05/24/2024] [Indexed: 06/14/2024] Open
Abstract
Despite widespread adoption of tissue clearing techniques in recent years, poor access to suitable light-sheet fluorescence microscopes remains a major obstacle for biomedical end-users. Here, we present descSPIM (desktop-equipped SPIM for cleared specimens), a low-cost ($20,000-50,000), low-expertise (one-day installation by a non-expert), yet practical do-it-yourself light-sheet microscope as a solution for this bottleneck. Even the most fundamental configuration of descSPIM enables multi-color imaging of whole mouse brains and a cancer cell line-derived xenograft tumor mass for the visualization of neurocircuitry, assessment of drug distribution, and pathological examination by false-colored hematoxylin and eosin staining in a three-dimensional manner. Academically open-sourced ( https://github.com/dbsb-juntendo/descSPIM ), descSPIM allows routine three-dimensional imaging of cleared samples in minutes. Thus, the dissemination of descSPIM will accelerate biomedical discoveries driven by tissue clearing technologies.
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Affiliation(s)
- Kohei Otomo
- Department of Biochemistry and Systems Biomedicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Biochemistry II, Juntendo University School of Medicine, Tokyo, Japan
- Nakatani Biomedical Spatialomics Hub, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
| | - Takaki Omura
- Department of Biochemistry and Systems Biomedicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Nakatani Biomedical Spatialomics Hub, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
- Department of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Yuki Nozawa
- Biochemistry II, Juntendo University School of Medicine, Tokyo, Japan
| | - Steven J Edwards
- Science for Life Laboratory, Department of Applied Physics, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Yukihiko Sato
- Department of Biochemistry and Systems Biomedicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Nakatani Biomedical Spatialomics Hub, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuri Saito
- Department of Biochemistry and Systems Biomedicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Nakatani Biomedical Spatialomics Hub, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shigehiro Yagishita
- Department of Pharmacology and Therapeutics, Fundamental Innovative Oncology Core, National Cancer Center Research Institute, Tokyo, Japan
- Division of Molecular Pharmacology, National Cancer Center Research Institute, Tokyo, Japan
| | - Hitoshi Uchida
- Department of System Pathology for Neurological Disorders, Brain Research Institute, Niigata University, Niigata, Japan
| | - Yuki Watakabe
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
| | - Kiyotada Naitou
- Department of Basic Veterinary Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Rin Yanai
- Advanced Neuroimaging Center, Institute for Quantum Medical Sciences, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Naruhiko Sahara
- Advanced Neuroimaging Center, Institute for Quantum Medical Sciences, National Institutes for Quantum Science and Technology, Chiba, Japan
| | - Satoshi Takagi
- Division of Experimental Chemotherapy, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Ryohei Katayama
- Division of Experimental Chemotherapy, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yusuke Iwata
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toshiro Shiokawa
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoku Hayakawa
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kensuke Otsuka
- Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, Chiba, Japan
| | - Haruko Watanabe-Takano
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School, Tokyo, Japan
| | - Yuka Haneda
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School, Tokyo, Japan
| | - Shigetomo Fukuhara
- Department of Molecular Pathophysiology, Institute for Advanced Medical Sciences, Nippon Medical School, Tokyo, Japan
| | - Miku Fujiwara
- Department of Developmental Biology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takenobu Nii
- Department of Developmental Biology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Chikara Meno
- Department of Developmental Biology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Naoki Takeshita
- Anatomy and Developmental Biology, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kenta Yashiro
- Anatomy and Developmental Biology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Juan Marcelo Rosales Rocabado
- Division of Bio-prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masaru Kaku
- Division of Bio-prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Tatsuya Yamada
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, USA
| | - Yumiko Oishi
- Department of Meidical Biochemistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroyuki Koike
- Department of Meidical Biochemistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yinglan Cheng
- Department of Meidical Biochemistry, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keisuke Sekine
- Laboratory of Cancer Cell Systems, National Cancer Center Research Institute, Tokyo, Japan
| | - Jun-Ichiro Koga
- The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Kaori Sugiyama
- Institute for Advanced Research of Biosystem Dynamics, Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Kenichi Kimura
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan
| | - Fuyuki Karube
- Lab of Histology and Cytology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hyeree Kim
- Department of Systems Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Ichiro Manabe
- Department of Systems Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tomomi Nemoto
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, Japan
| | - Kazuki Tainaka
- Department of System Pathology for Neurological Disorders, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akinobu Hamada
- Department of Pharmacology and Therapeutics, Fundamental Innovative Oncology Core, National Cancer Center Research Institute, Tokyo, Japan
- Division of Molecular Pharmacology, National Cancer Center Research Institute, Tokyo, Japan
| | - Hjalmar Brismar
- Science for Life Laboratory, Department of Applied Physics, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Etsuo A Susaki
- Department of Biochemistry and Systems Biomedicine, Juntendo University Graduate School of Medicine, Tokyo, Japan.
- Biochemistry II, Juntendo University School of Medicine, Tokyo, Japan.
- Nakatani Biomedical Spatialomics Hub, Juntendo University Graduate School of Medicine, Tokyo, Japan.
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2
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Isotropic imaging across spatial scales with axially swept light-sheet microscopy. Nat Protoc 2022; 17:2025-2053. [PMID: 35831614 PMCID: PMC10111370 DOI: 10.1038/s41596-022-00706-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 03/30/2022] [Indexed: 11/09/2022]
Abstract
Light-sheet fluorescence microscopy is a rapidly growing technique that has gained tremendous popularity in the life sciences owing to its high-spatiotemporal resolution and gentle, non-phototoxic illumination. In this protocol, we provide detailed directions for the assembly and operation of a versatile light-sheet fluorescence microscopy variant, referred to as axially swept light-sheet microscopy (ASLM), that delivers an unparalleled combination of field of view, optical resolution and optical sectioning. To democratize ASLM, we provide an overview of its working principle and applications to biological imaging, as well as pragmatic tips for the assembly, alignment and control of its optical systems. Furthermore, we provide detailed part lists and schematics for several variants of ASLM that together can resolve molecular detail in chemically expanded samples, subcellular organization in living cells or the anatomical composition of chemically cleared intact organisms. We also provide software for instrument control and discuss how users can tune imaging parameters to accommodate diverse sample types. Thus, this protocol will serve not only as a guide for both introductory and advanced users adopting ASLM, but as a useful resource for any individual interested in deploying custom imaging technology. We expect that building an ASLM will take ~1-2 months, depending on the experience of the instrument builder and the version of the instrument.
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Dibaji H, Prince MNH, Yi Y, Zhao H, Chakraborty T. Axial scanning of dual focus to improve light sheet microscopy. BIOMEDICAL OPTICS EXPRESS 2022; 13:4990-5003. [PMID: 36187249 PMCID: PMC9484433 DOI: 10.1364/boe.464292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 06/16/2023]
Abstract
Axially swept light sheet microscopy (ASLM) is an emerging technique that enables isotropic, subcellular resolution imaging with high optical sectioning capability over a large field-of-view (FOV). Due to its versatility across a broad range of immersion media, it has been utilized to image specimens that may range from live cells to intact chemically cleared organs. However, because of its design, the performance of ASLM-based microscopes is impeded by a low detection signal and the maximum achievable frame-rate for full FOV imaging. Here we present a new optical concept that pushes the limits of ASLM further by scanning two staggered light sheets and simultaneously synchronizing the rolling shutter of a scientific camera. For a particular peak-illumination-intensity, this idea can make ASLMs image twice as fast without compromising the detection signal. Alternately, for a particular frame rate our method doubles the detection signal without requiring to double the peak-illumination-power, thereby offering a gentler illumination scheme compared to tradition single-focus ASLM. We demonstrate the performance of our instrument by imaging fluorescent beads and a PEGASOS cleared-tissue mouse brain.
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Affiliation(s)
- Hassan Dibaji
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
| | - Md Nasful Huda Prince
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
| | - Yating Yi
- Chinese Institute for Brain Research, Bejing 102206, China
| | - Hu Zhao
- Chinese Institute for Brain Research, Bejing 102206, China
| | - Tonmoy Chakraborty
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87102, USA
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4
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Liu C, Yu X, Bai C, Li X, Zhou Y, Yan S, Min J, Dan D, Li R, Gu S, Yao B. Axial resolution enhancement for planar Airy beam light-sheet microscopy via the complementary beam subtraction method. APPLIED OPTICS 2021; 60:10239-10245. [PMID: 34807133 DOI: 10.1364/ao.441070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
Airy beam light-sheet illumination can extend the field of view (FOV) of light-sheet fluorescence microscopy due to the unique propagation properties of non-diffraction and self-acceleration. However, the side lobes create undesirable out-of-focus background, leading to poor axial resolution and low image contrast. Here, we propose an Airy complementary beam subtraction (ACBS) method to improve the axial resolution while keeping the extended FOV. By scanning the optimized designed complementary beam that has two main lobes (TML), the generated complementary light-sheet has almost identical intensity distribution to that of the planar Airy light-sheet except for the central lobe. Subtraction of the two images acquired by double exposure respectively using the planar Airy light-sheet and the planar TML light-sheet can effectively suppress the influence of the out-of-focus background. The axial resolution improves from ∼4µm to 1.2 µm. The imaging performance was demonstrated by imaging specimens of aspergillus conidiophores and GFP labeled mouse brain section. The results show that the ACBS method enables the Airy beam light-sheet fluorescence microscopy to obtain better imaging quality.
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5
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Liu Y, Rollins AM, Jenkins MW. CompassLSM: axially swept light-sheet microscopy made simple. BIOMEDICAL OPTICS EXPRESS 2021; 12:6571-6589. [PMID: 34745757 PMCID: PMC8547981 DOI: 10.1364/boe.440292] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/17/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
Axially swept light-sheet microscopy (ASLM) is an effective method of generating a uniform light sheet across a large field of view (FOV). However, current ASLM designs are more complicated than conventional light-sheet systems, limiting their adaptation in less experienced labs. By eliminating difficult-to-align components and reducing the total number of components, we show that high-performance ASLM can be accomplished much simpler than existing designs, requiring less expertise and effort to construct, align, and operate. Despite the high simplicity, our design achieved 3.5-µm uniform optical sectioning across a >6-mm FOV, surpassing existing light-sheet designs with similar optical sectioning. With well-corrected chromatic aberration, multi-channel fluorescence imaging can be performed without realignment. This manuscript provides a comprehensive tutorial on building the system and demonstrates the imaging performance with optically cleared whole-mount tissue samples.
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Affiliation(s)
- Yehe Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Andrew M. Rollins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Michael W. Jenkins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
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6
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Zhang Z, Yao X, Yin X, Ding Z, Huang T, Huo Y, Ji R, Peng H, Guo ZV. Multi-Scale Light-Sheet Fluorescence Microscopy for Fast Whole Brain Imaging. Front Neuroanat 2021; 15:732464. [PMID: 34630049 PMCID: PMC8497830 DOI: 10.3389/fnana.2021.732464] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/12/2021] [Indexed: 12/23/2022] Open
Abstract
Whole-brain imaging has become an increasingly important approach to investigate neural structures, such as somata distribution, dendritic morphology, and axonal projection patterns. Different structures require whole-brain imaging at different resolutions. Thus, it is highly desirable to perform whole-brain imaging at multiple scales. Imaging a complete mammalian brain at synaptic resolution is especially challenging, as it requires continuous imaging from days to weeks because of the large number of voxels to sample, and it is difficult to acquire a constant quality of imaging because of light scattering during in toto imaging. Here, we reveal that light-sheet microscopy has a unique advantage over wide-field microscopy in multi-scale imaging because of its decoupling of illumination and detection. Based on this observation, we have developed a multi-scale light-sheet microscope that combines tiling of light-sheet, automatic zooming, periodic sectioning, and tissue expansion to achieve a constant quality of brain-wide imaging from cellular (3 μm × 3 μm × 8 μm) to sub-micron (0.3 μm × 0.3 μm × 1 μm) spatial resolution rapidly (all within a few hours). We demonstrated the strength of the system by testing it using mouse brains prepared using different clearing approaches. We were able to track electrode tracks as well as axonal projections at sub-micron resolution to trace the full morphology of single medial prefrontal cortex (mPFC) neurons that have remarkable diversity in long-range projections.
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Affiliation(s)
- Zhouzhou Zhang
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xiao Yao
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
- Tsinghua-Peking Joint Center for Life Sciences, Beijing, China
| | - Xinxin Yin
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
- Tsinghua-Peking Joint Center for Life Sciences, Beijing, China
| | - Zhangcan Ding
- SEU-Allen Joint Center, Institute for Brain and Intelligence, Southeast University, Nanjing, China
| | - Tianyi Huang
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Yan Huo
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Runan Ji
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Hanchuan Peng
- SEU-Allen Joint Center, Institute for Brain and Intelligence, Southeast University, Nanjing, China
- Allen Institute for Brain Science, Seattle, WA, United States
| | - Zengcai V Guo
- School of Medicine, IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
- Tsinghua-Peking Joint Center for Life Sciences, Beijing, China
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7
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Aakhte M, Müller HAJ. Multiview tiling light sheet microscopy for 3D high-resolution live imaging. Development 2021; 148:272173. [PMID: 34409448 DOI: 10.1242/dev.199725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 08/13/2021] [Indexed: 11/20/2022]
Abstract
Light-sheet or selective plane illumination microscopy (SPIM) is ideally suited for in toto imaging of living specimens at high temporal-spatial resolution. In SPIM, the light scattering that occurs during imaging of opaque specimens brings about limitations in terms of resolution and the imaging field of view. To ameliorate this shortcoming, the illumination beam can be engineered into a highly confined light sheet over a large field of view and multi-view imaging can be performed by applying multiple lenses combined with mechanical rotation of the sample. Here, we present a Multiview tiling SPIM (MT-SPIM) that combines the Multi-view SPIM (M-SPIM) with a confined, multi-tiled light sheet. The MT-SPIM provides high-resolution, robust and rotation-free imaging of living specimens. We applied the MT-SPIM to image nuclei and Myosin II from the cellular to subcellular spatial scale in early Drosophila embryogenesis. We show that the MT-SPIM improves the axial-resolution relative to the conventional M-SPIM by a factor of two. We further demonstrate that this axial resolution enhancement improves the automated segmentation of Myosin II distribution and of nuclear volumes and shapes.
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Affiliation(s)
- Mostafa Aakhte
- Developmental Genetics Group, Institute of Biology, University of Kassel, Heinrich-Plett Strasse 40, 34132 Kassel, Germany
| | - Hans-Arno J Müller
- Developmental Genetics Group, Institute of Biology, University of Kassel, Heinrich-Plett Strasse 40, 34132 Kassel, Germany
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8
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Deng S, Ding Z, Yuan D, Liu M, Zhou H. Investigation of the extended focusing capability of the spherical aberration to enlarge the field of view in light-sheet fluorescence microscopy. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2021; 38:19-24. [PMID: 33362148 DOI: 10.1364/josaa.410209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/11/2020] [Indexed: 06/12/2023]
Abstract
In light-sheet fluorescence microscopy (LSFM), using Gaussian beams for light-sheet generation results in a trade-off between the thickness and the field of view (FOV). Here we present a theoretical analysis of using spherical aberration to enlarge the FOV while keeping the light-sheet thickness small. Such spherical aberration can arise when focusing beams through an interface between materials of mismatched refractive indices. The depth-of-focus extension of the Gaussian beam is achieved when using air objectives to focus light into the samples dipped in the immersion medium with a higher refractive index. By scanning this elongated beam, a thin light sheet with a wide FOV can be used for LSFM imaging. Meanwhile, the accompanied sidelobes with the spherical aberrated light sheet, which are mainly distributed in the rear part of the light sheet, are also discussed. Simulation results show that an extended FOV of 64.4µm is possible for an objective lens of NA=0.3, which is about 5 times that of the unaberrated case. For such an extended FOV, a comparatively thin thickness of 1.38µm as well as the first sidelobe about 11.1% of the peak intensity in the center are also demonstrated.
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9
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Sparks H, Dvinskikh L, Firth JM, Francis AJ, Harding SE, Paterson C, MacLeod KT, Dunsby C. Development a flexible light-sheet fluorescence microscope for high-speed 3D imaging of calcium dynamics and 3D imaging of cellular microstructure. JOURNAL OF BIOPHOTONICS 2020; 13:e201960239. [PMID: 32101366 DOI: 10.1002/jbio.201960239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/07/2020] [Accepted: 02/22/2020] [Indexed: 06/10/2023]
Abstract
We report a flexible light-sheet fluorescence microscope (LSFM) designed for studying dynamic events in cardiac tissue at high speed in 3D and the correlation of these events to cell microstructure. The system employs two illumination-detection modes: the first uses angle-dithering of a Gaussian light sheet combined with remote refocusing of the detection plane for video-rate volumetric imaging; the second combines digitally-scanned light-sheet illumination with an axially-swept light-sheet waist and stage-scanned acquisition for improved axial resolution compared to the first mode. We present a characterisation of the spatial resolution of the system in both modes. The first illumination-detection mode achieves dual spectral-channel imaging at 25 volumes per second with 1024 × 200 × 50 voxel volumes and is demonstrated by time-lapse imaging of calcium dynamics in a live cardiomyocyte. The second illumination-detection mode is demonstrated through the acquisition of a higher spatial resolution structural map of the t-tubule network in a fixed cardiomyocyte cell.
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Affiliation(s)
- Hugh Sparks
- Photonics Group, Department of Physics, Imperial College London, London, UK
| | - Liuba Dvinskikh
- Photonics Group, Department of Physics, Imperial College London, London, UK
- Institute of Chemical Biology, Department of Chemistry, Imperial College London, London, UK
- Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Jahn M Firth
- Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Alice J Francis
- Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Sian E Harding
- Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Carl Paterson
- Photonics Group, Department of Physics, Imperial College London, London, UK
| | - Ken T MacLeod
- Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Chris Dunsby
- Photonics Group, Department of Physics, Imperial College London, London, UK
- Centre for Pathology, Faculty of Medicine, Imperial College London, London, UK
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10
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Xiong B, Han X, Wu J, Xie H, Dai Q. Improving axial resolution of Bessel beam light-sheet fluorescence microscopy by photobleaching imprinting. OPTICS EXPRESS 2020; 28:9464-9476. [PMID: 32225553 DOI: 10.1364/oe.388808] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
Light-sheet microscopy has been widely used in high-speed fluorescence imaging with low phototoxicity, while the trade-off between the field-of-view and optical sectioning capability limits its application in large-scale imaging. Although Bessel beam light-sheet microscopy greatly enhances the light-sheet length with the self-healing ability, it suffers from the strong side-lobe effect. To solve these problems, we introduce the photobleaching imprinting technique in Bessel beam light-sheet microscopy. By extracting the non-linear photobleaching-induced fluorescence decay, we get rid of the large concentric side lobe structures of the Bessel beam to achieve uniform isotropic resolution across a large field-of-view for large-scale fluorescence imaging. Both numerical simulations and experimental results on various samples are demonstrated to show our enhanced resolution and contrast over traditional Bessel-beam light-sheet microscopy.
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11
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Huang C, Tai CY, Yang KP, Chang WK, Hsu KJ, Hsiao CC, Wu SC, Lin YY, Chiang AS, Chu SW. All-Optical Volumetric Physiology for Connectomics in Dense Neuronal Structures. iScience 2019; 22:133-146. [PMID: 31765994 PMCID: PMC6883334 DOI: 10.1016/j.isci.2019.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/19/2019] [Accepted: 11/04/2019] [Indexed: 01/04/2023] Open
Abstract
All-optical physiology (AOP) manipulates and reports neuronal activities with light, allowing for interrogation of neuronal functional connections with high spatiotemporal resolution. However, contemporary high-speed AOP platforms are limited to single-depth or discrete multi-plane recordings that are not suitable for studying functional connections among densely packed small neurons, such as neurons in Drosophila brains. Here, we constructed a 3D AOP platform by incorporating single-photon point stimulation and two-photon high-speed volumetric recordings with a tunable acoustic gradient-index (TAG) lens. We demonstrated the platform effectiveness by studying the anterior visual pathway (AVP) of Drosophila. We achieved functional observation of spatiotemporal coding and the strengths of calcium-sensitive connections between anterior optic tubercle (AOTU) sub-compartments and >70 tightly assembled 2-μm bulb (BU) microglomeruli in 3D coordinates with a single trial. Our work aids the establishment of in vivo 3D functional connectomes in neuron-dense brain areas. All-optical volumetric physiology = precise stimulation + fast volumetric recording Precise single-photon point stimulation among genetically defined neurons 3D two-photon imaging by an acoustic gradient-index lens for dense neural structures Observation of 3D functional connectivity in Drosophila anterior visual pathway
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Affiliation(s)
- Chiao Huang
- Department of Physics, National Taiwan University, 1, Sec 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Chu-Yi Tai
- Institute of Biotechnology, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan
| | - Kai-Ping Yang
- Department of Physics, National Taiwan University, 1, Sec 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Wei-Kun Chang
- Brain Research Center, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan
| | - Kuo-Jen Hsu
- Department of Physics, National Taiwan University, 1, Sec 4, Roosevelt Road, Taipei 10617, Taiwan; Brain Research Center, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan
| | - Ching-Chun Hsiao
- Department of Engineering and System Science, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan
| | - Shun-Chi Wu
- Department of Engineering and System Science, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan
| | - Yen-Yin Lin
- Brain Research Center, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan.
| | - Ann-Shyn Chiang
- Institute of Biotechnology, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan; Brain Research Center, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan; Institute of Systems Neuroscience, National Tsing Hua University, 101, Sec 2, Guangfu Road, Hsinchu 30013, Taiwan; Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80780, Taiwan; Graduate Institute of Clinical Medical Science, China Medical University, Taichung 40402, Taiwan; Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; Kavli Institute for Brain and Mind, University of California, San Diego, CA 92161, USA.
| | - Shi-Wei Chu
- Department of Physics, National Taiwan University, 1, Sec 4, Roosevelt Road, Taipei 10617, Taiwan; Molecular Imaging Center, National Taiwan University, 1, Sec 4, Roosevelt Road, Taipei 10617, Taiwan.
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12
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Jeon S, Kim J, Lee D, Baik JW, Kim C. Review on practical photoacoustic microscopy. PHOTOACOUSTICS 2019; 15:100141. [PMID: 31463194 PMCID: PMC6710377 DOI: 10.1016/j.pacs.2019.100141] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 06/19/2019] [Accepted: 07/24/2019] [Indexed: 05/03/2023]
Abstract
Photoacoustic imaging (PAI) has many interesting advantages, such as deep imaging depth, high image resolution, and high contrast to intrinsic and extrinsic chromophores, enabling morphological, functional, and molecular imaging of living subjects. Photoacoustic microscopy (PAM) is one form of the PAI inheriting its characteristics and is useful in both preclinical and clinical research. Over the years, PAM systems have been evolved in several forms and each form has its relative advantages and disadvantages. Thus, to maximize the benefits of PAM for a specific application, it is important to configure the PAM system optimally by targeting a specific application. In this review, we provide practical methods for implementing a PAM system to improve the resolution, signal-to-noise ratio (SNR), and imaging speed. In addition, we review the preclinical and the clinical applications of PAM and discuss the current challenges and the scope for future developments.
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Affiliation(s)
| | | | | | | | - Chulhong Kim
- Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
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13
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Next-generation imaging of the skeletal system and its blood supply. Nat Rev Rheumatol 2019; 15:533-549. [PMID: 31395974 DOI: 10.1038/s41584-019-0274-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2019] [Indexed: 12/16/2022]
Abstract
Bone is organized in a hierarchical 3D architecture. Traditionally, analysis of the skeletal system was based on bone mass assessment by radiographic methods or on the examination of bone structure by 2D histological sections. Advanced imaging technologies and big data analysis now enable the unprecedented examination of bone and provide new insights into its 3D macrostructure and microstructure. These technologies comprise ex vivo and in vivo methods including high-resolution computed tomography (CT), synchrotron-based imaging, X-ray microscopy, ultra-high-field magnetic resonance imaging (MRI), light-sheet fluorescence microscopy, confocal and intravital two-photon imaging. In concert, these techniques have been used to detect and quantify a novel vascular system of trans-cortical vessels in bone. Furthermore, structures such as the lacunar network, which harbours and connects osteocytes, become accessible for 3D imaging and quantification using these methods. Next-generation imaging of the skeletal system and its blood supply are anticipated to contribute to an entirely new understanding of bone tissue composition and function, from macroscale to nanoscale, in health and disease. These insights could provide the basis for early detection and precision-type intervention of bone disorders in the future.
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14
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Ping J, Zhao F, Nie J, Yu T, Zhu D, Liu M, Fei P. Propagating-path uniformly scanned light sheet excitation microscopy for isotropic volumetric imaging of large specimens. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-5. [PMID: 31385482 PMCID: PMC6983483 DOI: 10.1117/1.jbo.24.8.086501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/15/2019] [Indexed: 05/26/2023]
Abstract
We demonstrate a propagating-path uniformly scanned light sheet excitation (PULSE) microscopy based on the oscillation of voice coil motor that can rapidly drive a thin light sheet along its propagation direction. By synchronizing the rolling shutter of a camera with the motion of laser sheet, we can obtain a uniform plane-illuminated image far beyond the confocal range of Gaussian beam. A stable 1.7-μm optical sectioning under a 3.3 mm × 3.3 mm wide field of view (FOV) has been achieved for up to 20 Hz volumetric imaging of large biological specimens. PULSE method transforms the extent of plane illumination from one intrinsically limited by the short confocal range (μm scale) to one defined by the motor oscillation range (mm scale). Compared to the conventional Gaussian light sheet imaging, our method greatly mitigates the compromise of axial resolution and successfully extends the FOV over 100 times. We demonstrate the applications of PULSE method by rapidly imaging cleared mouse spinal cord and live zebrafish larva at isotropic subcellular resolution.
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Affiliation(s)
- Junyu Ping
- Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan, China
| | - Fang Zhao
- Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan, China
| | - Jun Nie
- Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan, China
| | - Tingting Yu
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Wuhan, China
| | - Dan Zhu
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Wuhan, China
| | - Mugen Liu
- Huazhong University of Science and Technology, College of Life Science and Technology, Wuhan, China
| | - Peng Fei
- Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan, China
- Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Wuhan, China
- Huazhong University of Science and Technology, Shenzhen Research Institute, Shenzhen, China
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15
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Colomb W, Osmond M, Durfee C, Krebs MD, Sarkar SK. Imaging and Analysis of Cellular Locations in Three-Dimensional Tissue Models. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2019; 25:753-761. [PMID: 30853032 DOI: 10.1017/s1431927619000102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The absence of quantitative in vitro cell-extracellular matrix models represents an important bottleneck for basic research and human health. Randomness of cellular distributions provides an opportunity for the development of a quantitative in vitro model. However, quantification of the randomness of random cell distributions is still lacking. In this paper, we have imaged cellular distributions in an alginate matrix using a multiview light sheet microscope and developed quantification metrics of randomness by modeling it as a Poisson process, a process that has constant probability of occurring in space or time. We imaged fluorescently labeled human mesenchymal stem cells embedded in an alginate matrix of thickness greater than 5 mm with axial resolution, the mean full width at half maximum of the axial intensity profiles of fluorescent particles. Simulated randomness agrees well with the experiments. Quantification of distributions and validation by simulations will enable quantitative study of cell-matrix interactions in tissue models.
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Affiliation(s)
- Warren Colomb
- Department of Physics,Colorado School of Mines,Golden, Colorado,USA
| | - Matthew Osmond
- Department of Chemical & Biological Engineering,Colorado School of Mines,Golden, Colorado,USA
| | - Charles Durfee
- Department of Physics,Colorado School of Mines,Golden, Colorado,USA
| | - Melissa D Krebs
- Department of Chemical & Biological Engineering,Colorado School of Mines,Golden, Colorado,USA
| | - Susanta K Sarkar
- Department of Physics,Colorado School of Mines,Golden, Colorado,USA
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16
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Meinert T, Rohrbach A. Light-sheet microscopy with length-adaptive Bessel beams. BIOMEDICAL OPTICS EXPRESS 2019; 10:670-681. [PMID: 30800507 PMCID: PMC6377868 DOI: 10.1364/boe.10.000670] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 12/06/2018] [Accepted: 12/06/2018] [Indexed: 06/01/2023]
Abstract
In light-sheet microscopy, a confined layer in the focal plane of the detection objective is illuminated from the side. The illumination light-sheet usually has a constant beam length independent of the shape of the biological object. Since the thickness and the length of the illumination light-sheet are coupled, a tradeoff between resolution, contrast and field of view has to be accepted. Here we show that scanned Bessel beams enable object adapted tailoring of the light-sheet defined by its beam length and position. The individual beam parameters are obtained from automatic object shape estimation by low-power laser light scattered at the object. Using Arabidopsis root tips, cell clusters and zebrafish tails, we demonstrate that Bessel beam light-sheet tailoring leads to a 50% increase in image contrast and a 50% reduction in photobleaching. Light-sheet tailoring requires only binary amplitude modulation, therefore allowing a real time illumination adaptation with little technical effort in the future.
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17
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Zhao J, Zong W, Zhao Y, Gou D, Liang S, Shen J, Wu Y, Zheng X, Wu R, Wang X, Niu F, Wang A, Zhang Y, Xiong JW, Chen L, Liu Y. In vivo imaging of β-cell function reveals glucose-mediated heterogeneity of β-cell functional development. eLife 2019; 8:41540. [PMID: 30694176 PMCID: PMC6395064 DOI: 10.7554/elife.41540] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 01/29/2019] [Indexed: 12/22/2022] Open
Abstract
How pancreatic β-cells acquire function in vivo is a long-standing mystery due to the lack of technology to visualize β-cell function in living animals. Here, we applied a high-resolution two-photon light-sheet microscope for the first in vivo imaging of Ca2+activity of every β-cell in Tg (ins:Rcamp1.07) zebrafish. We reveal that the heterogeneity of β-cell functional development in vivo occurred as two waves propagating from the islet mantle to the core, coordinated by islet vascularization. Increasing amounts of glucose induced functional acquisition and enhancement of β-cells via activating calcineurin/nuclear factor of activated T-cells (NFAT) signaling. Conserved in mammalians, calcineurin/NFAT prompted high-glucose-stimulated insulin secretion of neonatal mouse islets cultured in vitro. However, the reduction in low-glucose-stimulated insulin secretion was dependent on optimal glucose but independent of calcineurin/NFAT. Thus, combination of optimal glucose and calcineurin activation represents a previously unexplored strategy for promoting functional maturation of stem cell-derived β-like cells in vitro. When the amount of sugar in our body rises, specialised cells known as β-cells respond by releasing insulin, a hormone that acts on various organs to keep blood sugar levels within a healthy range. These cells cluster in small ‘islets’ inside our pancreas. If the number of working β-cells declines, diseases such as diabetes may appear and it becomes difficult to regulate the amount of sugar in our bodies. Understanding how β-cells normally develop and mature in the embryo could help us learn how to make new ones in the laboratory. In particular, researchers are interested in studying how different body signals, such as blood sugar levels, turn immature β-cells into fully productive cells. However, in mammals, the pancreas and its islets are buried deep inside the embryo and they cannot be observed easily. Here, Zhao et al. circumvented this problem by doing experiments on zebrafish embryos, which are transparent, grow outside their mother’s body, and have pancreatic islets that are similar to the ones found in mammals. A three-dimensional microscopy technique was used to watch individual β-cells activity over long periods, which revealed that the cells start being able to produce insulin at different times. The β-cells around the edge of each islet were the first to have access to blood sugar signals: they gained their hormone-producing role earlier than the cells in the core of an islet, which only sensed the information later on. Zhao et al. then exposed the zebrafish embryos to different amounts of sugar. This showed that there is an optimal concentration of sugar which helps β-cells develop by kick-starting a cascade of events inside the cell. Further experiments confirmed that the same pathway and optimal sugar concentration exist for mammalian islets grown in the laboratory. These findings may help researchers find better ways of making new β-cells to treat diabetic patients. In the future, using the three-dimensional imaging technique in zebrafish embryos may lead to more discoveries on how the pancreas matures.
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Affiliation(s)
- Jia Zhao
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Weijian Zong
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China.,China Department of Cognitive Sciences, Institute of Basic Medical Sciences, Beijing, China
| | - Yiwen Zhao
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Dongzhou Gou
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Shenghui Liang
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Jiayu Shen
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Yi Wu
- School of Software and Microelectronics, Peking University, Beijing, China
| | - Xuan Zheng
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Runlong Wu
- School of Electronics Engineering and Computer Science, Peking University, Beijing, China
| | - Xu Wang
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Fuzeng Niu
- State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China
| | - Aimin Wang
- State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China
| | - Yunfeng Zhang
- School of Electronics Engineering and Computer Science, Peking University, Beijing, China
| | - Jing-Wei Xiong
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Liangyi Chen
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China
| | - Yanmei Liu
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking University, Beijing, China.,Institute for Brain Research and Rehabilitation (IBRR), Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou, China
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18
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Haouas M, Chebbi B, Golub I. Extension of the span and optimization of the optical "magic carpet": generation of a wide quasi-nondiffracting light sheet. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2019; 36:124-131. [PMID: 30645347 DOI: 10.1364/josaa.36.000124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
Light sheet illumination is the basis in developing light sheet microscopy (LSM), a technique with significant advantages compared with other classical techniques. Most proposed optical systems to generate light sheets for LSM use many optical elements, which require extensive adjustments and are costly; moreover, they generate a nonuniform or semiuniform light sheet or have a short depth of field (DOF). A simple scheme using a pair of double slits and a cylindrical lens for generating a quasi-nondiffracting 2D light sheet was reported in Opt. Lett.40, 5121 (2015)OPLEDP0146-959210.1364/OL.40.005121. In the present investigation, we elaborate on the optimization of the mask used. As the separation between the two slits increases, the light sheet becomes thinner and the DOF smaller and vice versa. The slits' width does not affect the light sheet thickness, but it does affect the intensity of the side lobes. For convergence angles of the inner slits from 0.75° to 8°, an optimum ratio of the slits' separation/width of 2.182 is recommended. The obtained light sheet is quasi-diffraction-free, namely, while its DOF is comparable with that of a Gaussian beam, its diffraction broadening is substantially smaller. We also add to the previously developed configuration a Powell lens in order to expand the beam in the spanwise direction while keeping nearly constant intensity in this dimension. We perform scalar diffraction theory calculations and conduct measurements showing the nearly constant intensity in the significantly broadened span of the light sheet. Potential applications for the augmented width include imaging of certain large embryos, laser micromachining, and microparticle image velocimetry.
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19
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Cancellation of Bessel beam side lobes for high-contrast light sheet microscopy. Sci Rep 2018; 8:17178. [PMID: 30464219 PMCID: PMC6249239 DOI: 10.1038/s41598-018-35006-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 10/19/2018] [Indexed: 01/25/2023] Open
Abstract
An ideal illumination for light sheet fluorescence microscopy entails both a localized and a propagation invariant optical field. Bessel beams and Airy beams satisfy these conditions, but their non-diffracting feature comes at the cost of the presence of high-energy side lobes that notably degrade the imaging contrast and induce photobleaching. Here, we demonstrate the use of a light droplet illumination whose side lobes are suppressed by interfering Bessel beams of specific k-vectors. Our droplet illumination readily achieves more than 50% extinction of the light distributed across the Bessel side lobes, providing a more efficient energy localization without loss in transverse resolution. In a standard light sheet fluorescence microscope, we demonstrate a two-fold contrast enhancement imaging micron-scale fluorescent beads. Results pave the way to new opportunities for rapid and deep in vivo observations of large-scale biological systems.
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20
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Qu Y, Hu Y. Analysis of axial scanning range and magnification variation in wide-field microscope for measurement using an electrically tunable lens. Microsc Res Tech 2018; 82:101-113. [PMID: 30451353 DOI: 10.1002/jemt.23113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/09/2018] [Accepted: 04/24/2018] [Indexed: 01/23/2023]
Abstract
Inserting an electrically tunable lens (ETL), such as liquid lens or tunable acoustic gradient lens, into a microscope can enable fast axial scanning, autofocusing, and extended depth of field. However, placing the ETL at different positions has different influences on image quality. Specially, in a wide-field microscope for measurement, the magnification has to be constant when introducing an ETL, otherwise it will affect measurement accuracy. To determine the best position of ETL, axial scanning range and magnification variation are quantitatively analyzed and discussed in finite and infinite microscopes through theoretical analysis, optical simulation, and experiment for four configurations: when ETL is placed at the back focal plane of objective, at the conjugate plane of objective's back focal plane between two relay lenses, or behind two relay lenses, and at imaging detector plane. The obtained results are as follows. When ETL is placed at the back focal plane, the system has a large scanning range, but the magnification varies because the back focal plane is inside the objective. When ETL is placed between two relay lenses, the magnification stays constant, but the scanning range is small. When ETL is placed behind two relay lenses, the magnification keeps invariant and the scanning range is large, but ETL and two relay lenses are inside the microscope and the system has to be customized. Finally, when ETL is placed at imaging detector plane, the magnification stays constant, but the scanning range is 0, which means the system has no axial scanning capability. RESEARCH HIGHLIGHTS: An electrically tunable lens (ETL) is introduced into a wide-field microscope for measurement. Axial scanning range and magnification variation are analyzed and discussed. Theoretical analysis, ZEMAX optical simulation and experiments are performed.
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Affiliation(s)
- Yufu Qu
- Department of Measurement Technology & Instrument, School of Instrumentation Science & Optoelectronics Engineering, Beihang University, Beijing, China
| | - Yongbo Hu
- Department of Measurement Technology & Instrument, School of Instrumentation Science & Optoelectronics Engineering, Beihang University, Beijing, China
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21
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Abstract
Minimally-invasive optical imaging requires that light is delivered efficiently to limit the detrimental impact of photodamage on delicate biological systems. Light sheet microscopy represents the exemplar in tissue specific optical imaging of small and mesoscopic samples alike. However, further gains towards gentler imaging require a more selective imaging strategy to limit exposure to multiple yet discrete tissues without overexposing the sample, particularly where the information content is sparse or particularly optically sensitive tissues are present. The development of sample-adaptive imaging techniques is crucial in pursuit of the next generation of smart, autonomous microscopes. Herein, we report a microscope capable of performing 4D (x, y, z, t) light patterning to selectively illuminate multiple, rapidly reconfigurable regions of interest while maintaining the rapid imaging speed and high contrast associated with light sheet microscopy. We illustrate this utility in living zebrafish larvae and phantom samples.
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22
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Gustavsson AK, Petrov PN, Moerner WE. Light sheet approaches for improved precision in 3D localization-based super-resolution imaging in mammalian cells [Invited]. OPTICS EXPRESS 2018; 26:13122-13147. [PMID: 29801343 PMCID: PMC6005674 DOI: 10.1364/oe.26.013122] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 03/30/2018] [Indexed: 05/08/2023]
Abstract
The development of imaging techniques beyond the diffraction limit has paved the way for detailed studies of nanostructures and molecular mechanisms in biological systems. Imaging thicker samples, such as mammalian cells and tissue, in all three dimensions, is challenging due to increased background and volumes to image. Light sheet illumination is a method that allows for selective irradiation of the image plane, and its inherent optical sectioning capability allows for imaging of biological samples with reduced background, photobleaching, and photodamage. In this review, we discuss the advantage of combining single-molecule imaging with light sheet illumination. We begin by describing the principles of single-molecule localization microscopy and of light sheet illumination. Finally, we present examples of designs that successfully have married single-molecule super-resolution imaging with light sheet illumination for improved precision in mammalian cells.
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23
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Automatic and adaptive heterogeneous refractive index compensation for light-sheet microscopy. Nat Commun 2017; 8:612. [PMID: 28931809 PMCID: PMC5606987 DOI: 10.1038/s41467-017-00514-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 06/30/2017] [Indexed: 11/17/2022] Open
Abstract
Optical tissue clearing has revolutionized researchers’ ability to perform fluorescent measurements of molecules, cells, and structures within intact tissue. One common complication to all optically cleared tissue is a spatially heterogeneous refractive index, leading to light scattering and first-order defocus. We designed C-DSLM (cleared tissue digital scanned light-sheet microscopy) as a low-cost method intended to automatically generate in-focus images of cleared tissue. We demonstrate the flexibility and power of C-DSLM by quantifying fluorescent features in tissue from multiple animal models using refractive index matched and mismatched microscope objectives. This includes a unique measurement of myelin tracks within intact tissue using an endogenous fluorescent reporter where typical clearing approaches render such structures difficult to image. For all measurements, we provide independent verification using standard serial tissue sectioning and quantification methods. Paired with advancements in volumetric image processing, C-DSLM provides a robust methodology to quantify sub-micron features within large tissue sections. Optical clearing of tissue has enabled optical imaging deeper into tissue due to significantly reduced light scattering. Here, Ryan et al. tackle first-order defocus, an artefact of a non-uniform refractive index, extending light-sheet microscopy to partially cleared samples.
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24
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Hsu KJ, Li KY, Lin YY, Chiang AS, Chu SW. Optimizing depth-of-field extension in optical sectioning microscopy techniques using a fast focus-tunable lens. OPTICS EXPRESS 2017; 25:16783-16794. [PMID: 28789179 DOI: 10.1364/oe.25.016783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/05/2017] [Indexed: 05/18/2023]
Abstract
Volume imaging based on a fast focus-tunable lens (FTL) allows three-dimensional (3D) observation within milliseconds by extending the depth-of-field (DOF) with sub-micrometer transverse resolution on optical sectioning microscopes. However, the previously published DOF extensions were neither axially uniform nor fit with theoretical prediction. In this work, complete theoretical treatments of focus extension with confocal and various multiphoton microscopes are established to correctly explain the previous results. Moreover, by correctly placing the FTL and properly adjusting incident beam diameter, a uniform DOF is achieved in which the actual extension nicely agrees with the theory. Our work not only provides a theoretical platform for volumetric imaging with FTL but also demonstrates the optimized imaging condition.
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25
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Integrated single- and two-photon light sheet microscopy using accelerating beams. Sci Rep 2017; 7:1435. [PMID: 28469191 PMCID: PMC5431168 DOI: 10.1038/s41598-017-01543-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/31/2017] [Indexed: 11/11/2022] Open
Abstract
We demonstrate the first light sheet microscope using propagation invariant, accelerating Airy beams that operates both in single- and two-photon modes. The use of the Airy beam permits us to develop an ultra compact, high resolution light sheet system without beam scanning. In two-photon mode, an increase in the field of view over the use of a standard Gaussian beam by a factor of six is demonstrated. This implementation for light sheet microscopy opens up new possibilities across a wide range of biomedical applications, especially for the study of neuronal processes.
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26
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Power RM, Huisken J. A guide to light-sheet fluorescence microscopy for multiscale imaging. Nat Methods 2017; 14:360-373. [DOI: 10.1038/nmeth.4224] [Citation(s) in RCA: 405] [Impact Index Per Article: 57.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 02/16/2017] [Indexed: 12/18/2022]
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27
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Diagonally Scanned Light-Sheet Microscopy for Fast Volumetric Imaging of Adherent Cells. Biophys J 2016; 110:1456-65. [PMID: 27028654 PMCID: PMC4816690 DOI: 10.1016/j.bpj.2016.01.029] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 12/31/2015] [Accepted: 01/28/2016] [Indexed: 11/23/2022] Open
Abstract
In subcellular light-sheet fluorescence microscopy (LSFM) of adherent cells, glass substrates are advantageously rotated relative to the excitation and emission light paths to avoid glass-induced optical aberrations. Because cells are spread across the sample volume, three-dimensional imaging requires a light-sheet with a long propagation length, or rapid sample scanning. However, the former degrades axial resolution and/or optical sectioning, while the latter mechanically perturbs sensitive biological specimens on pliant biomimetic substrates (e.g., collagen and basement membrane). Here, we use aberration-free remote focusing to diagonally sweep a narrow light-sheet along the sample surface, enabling multicolor imaging with high spatiotemporal resolution. Further, we implement a dithered Gaussian lattice to minimize sample-induced illumination heterogeneities, significantly improving signal uniformity. Compared with mechanical sample scanning, we drastically reduce sample oscillations, allowing us to achieve volumetric imaging at speeds of up to 3.5 Hz for thousands of Z-stacks. We demonstrate the optical performance with live-cell imaging of microtubule and actin cytoskeletal dynamics, phosphoinositide signaling, clathrin-mediated endocytosis, polarized blebbing, and endocytic vesicle sorting. We achieve three-dimensional particle tracking of clathrin-associated structures with velocities up to 4.5 μm/s in a dense intracellular environment, and show that such dynamics cannot be recovered reliably at lower volumetric image acquisition rates using experimental data, numerical simulations, and theoretical modeling.
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Duocastella M, Arnold CB, Puchalla J. Selectable light-sheet uniformity using tuned axial scanning. Microsc Res Tech 2016; 80:250-259. [PMID: 28132409 DOI: 10.1002/jemt.22795] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/27/2016] [Accepted: 09/19/2016] [Indexed: 11/10/2022]
Abstract
Light-sheet fluorescence microscopy (LSFM) is an optical sectioning technique capable of rapid three-dimensional (3D) imaging of a wide range of specimens with reduced phototoxicity and superior background rejection. However, traditional light-sheet generation approaches based on elliptical or circular Gaussian beams suffer an inherent trade-off between light-sheet thickness and area over which this thickness is preserved. Recently, an increase in light-sheet uniformity was demonstrated using rapid biaxial Gaussian beam scanning along the lateral and beam propagation directions. Here we apply a similar scanning concept to an elliptical beam generated by a cylindrical lens. In this case, only z-scanning of the elliptical beam is required and hence experimental implementation of the setup can be simplified. We introduce a simple dimensionless uniformity statistic to better characterize scanned light-sheets and experimentally demonstrate custom tailored uniformities up to a factor of 5 higher than those of unscanned elliptical beams. This technique offers a straightforward way to generate and characterize a custom illumination profile that provides enhanced utilization of the detector dynamic range and field of view, opening the door to faster and more efficient 2D and 3D imaging.
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Affiliation(s)
- Martí Duocastella
- Department of Nanophysics, Istituto Italiano di Tecnologia, Genoa, Via Morego 30, 16163, Italy
| | - Craig B Arnold
- Department of Mechanical and Aerospace Engineering, Princeton University, Olden St, Princeton, NJ, 08544, USA
| | - Jason Puchalla
- Department of Physics, Princeton University, Washington Avenue, Princeton, NJ, 08544, USA
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29
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Wulstein DM, Regan KE, Robertson-Anderson RM, McGorty R. Light-sheet microscopy with digital Fourier analysis measures transport properties over large field-of-view. OPTICS EXPRESS 2016; 24:20881-94. [PMID: 27607692 PMCID: PMC5946909 DOI: 10.1364/oe.24.020881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Using light-sheet microscopy combined with digital Fourier methods we probe the dynamics of colloidal samples and DNA molecules. This combination, referred to as selective-plane illumination differential dynamic microscopy (SPIDDM), has the benefit of optical sectioning to study, with minimal photobleaching, thick samples allowing us to measure the diffusivity of colloidal particles at high volume fractions. Further, SPIDDM exploits the inherent spatially-varying thickness of Gaussian light-sheets. Where the excitation sheet is most focused, we capture high spatial frequency dynamics as the signal-to-background is high. In thicker regions, we capture the slower dynamics as diffusion out of the sheet takes longer.
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30
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Welf ES, Driscoll MK, Dean KM, Schäfer C, Chu J, Davidson MW, Lin MZ, Danuser G, Fiolka R. Quantitative Multiscale Cell Imaging in Controlled 3D Microenvironments. Dev Cell 2016; 36:462-75. [PMID: 26906741 DOI: 10.1016/j.devcel.2016.01.022] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 11/11/2015] [Accepted: 01/26/2016] [Indexed: 12/30/2022]
Abstract
The microenvironment determines cell behavior, but the underlying molecular mechanisms are poorly understood because quantitative studies of cell signaling and behavior have been challenging due to insufficient spatial and/or temporal resolution and limitations on microenvironmental control. Here we introduce microenvironmental selective plane illumination microscopy (meSPIM) for imaging and quantification of intracellular signaling and submicrometer cellular structures as well as large-scale cell morphological and environmental features. We demonstrate the utility of this approach by showing that the mechanical properties of the microenvironment regulate the transition of melanoma cells from actin-driven protrusion to blebbing, and we present tools to quantify how cells manipulate individual collagen fibers. We leverage the nearly isotropic resolution of meSPIM to quantify the local concentration of actin and phosphatidylinositol 3-kinase signaling on the surfaces of cells deep within 3D collagen matrices and track the many small membrane protrusions that appear in these more physiologically relevant environments.
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Affiliation(s)
- Erik S Welf
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Meghan K Driscoll
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Kevin M Dean
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Claudia Schäfer
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jun Chu
- Departments of Bioengineering and Pediatrics, Stanford University, Stanford, CA 94305, USA
| | - Michael W Davidson
- National High Magnetic Field Laboratory, Department of Biological Science, Florida State University, Tallahassee, FL 32310, USA
| | - Michael Z Lin
- Departments of Bioengineering and Pediatrics, Stanford University, Stanford, CA 94305, USA
| | - Gaudenz Danuser
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Reto Fiolka
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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31
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Hedde PN, Gratton E. Selective plane illumination microscopy with a light sheet of uniform thickness formed by an electrically tunable lens. Microsc Res Tech 2016; 81:924-928. [PMID: 27338568 DOI: 10.1002/jemt.22707] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/02/2016] [Accepted: 06/02/2016] [Indexed: 11/11/2022]
Abstract
Light sheet microscopy is a powerful technique for rapid, three-dimensional fluorescence imaging of large specimen such as drosophila and zebrafish embryos. Yet, beam divergence results in a loss of axial resolution at the periphery of the light sheet. Here, we demonstrate how an electrically tunable lens can be utilized to maintain the minimal, diffraction-limited thickness of the light sheet over a wide field of view (>600 µm) at high frame rates (40 fps). This mode of operation is necessary for the application of fluorescence fluctuation spectroscopy in images. Microsc. Res. Tech. 81:924-928, 2018. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Per Niklas Hedde
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, California, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, Irvine, California, USA
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32
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A bright cyan-excitable orange fluorescent protein facilitates dual-emission microscopy and enhances bioluminescence imaging in vivo. Nat Biotechnol 2016; 34:760-7. [PMID: 27240196 PMCID: PMC4942401 DOI: 10.1038/nbt.3550] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 03/22/2016] [Indexed: 02/02/2023]
Abstract
Orange-red fluorescent proteins (FPs) are widely used in biomedical research for multiplexed epifluorescence microscopy with GFP-based probes, but their different excitation requirements make multiplexing with new advanced microscopy methods difficult. Separately, orange-red FPs are useful for deep-tissue imaging in mammals owing to the relative tissue transmissibility of orange-red light, but their dependence on illumination limits their sensitivity as reporters in deep tissues. Here we describe CyOFP1, a bright, engineered, orange-red FP that is excitable by cyan light. We show that CyOFP1 enables single-excitation multiplexed imaging with GFP-based probes in single-photon and two-photon microscopy, including time-lapse imaging in light-sheet systems. CyOFP1 also serves as an efficient acceptor for resonance energy transfer from the highly catalytic blue-emitting luciferase NanoLuc. An optimized fusion of CyOFP1 and NanoLuc, called Antares, functions as a highly sensitive bioluminescent reporter in vivo, producing substantially brighter signals from deep tissues than firefly luciferase and other bioluminescent proteins.
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33
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Dean KM, Roudot P, Welf ES, Danuser G, Fiolka R. Deconvolution-free Subcellular Imaging with Axially Swept Light Sheet Microscopy. Biophys J 2016; 108:2807-15. [PMID: 26083920 PMCID: PMC4472079 DOI: 10.1016/j.bpj.2015.05.013] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 05/08/2015] [Accepted: 05/12/2015] [Indexed: 11/30/2022] Open
Abstract
The use of propagation invariant Bessel beams has enabled high-resolution subcellular light sheet fluorescence microscopy. However, the energy within the concentric side lobe structure of Bessel beams increases significantly with propagation length, generating unwanted out-of-focus fluorescence that enforces practical limits on the imaging field of view size. Here, we present a light sheet fluorescence microscope that achieves 390 nm isotropic resolution and high optical sectioning strength (i.e., out-of-focus blur is strongly suppressed) over large field of views, without the need for structured illumination or deconvolution-based postprocessing. We demonstrate simultaneous dual-color, high-contrast, and high-dynamic-range time-lapse imaging of migrating cells in complex three-dimensional microenvironments, three-dimensional tracking of clathrin-coated pits, and long-term imaging spanning >10 h and encompassing >2600 time points.
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Affiliation(s)
- Kevin M Dean
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Philippe Roudot
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Erik S Welf
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Gaudenz Danuser
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Reto Fiolka
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas.
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34
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Susaki E, Ueda H. Whole-body and Whole-Organ Clearing and Imaging Techniques with Single-Cell Resolution: Toward Organism-Level Systems Biology in Mammals. Cell Chem Biol 2016; 23:137-157. [DOI: 10.1016/j.chembiol.2015.11.009] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 11/20/2015] [Accepted: 11/20/2015] [Indexed: 12/29/2022]
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35
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Golub I, Chebbi B, Golub J. Toward the optical "magic carpet": reducing the divergence of a light sheet below the diffraction limit. OPTICS LETTERS 2015; 40:5121-4. [PMID: 26512534 DOI: 10.1364/ol.40.005121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In 3D, diffraction-free or Bessel beams are well known and have found applications in diverse fields. An analog in 2D, or pseudonondiffracting (PND) beams, is a nontrivial problem, and existing methods suffer from deficiencies. For example, Airy beams are not highly localized, some PND beams have significant side lobes, and a cosine beam has to be truncated by a very narrow aperture thus discarding most of the energy. We show, both theoretically and experimentally, that it is possible to generate a quasi-nondiffracting 2D light beam in a simple and efficient fashion. This is achieved by placing a mask consisting of a pair of double slits on a cylindrical lens. The applications include light sheet microscopy/optical sectioning and particle manipulation.
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36
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Gao L. Extend the field of view of selective plan illumination microscopy by tiling the excitation light sheet. OPTICS EXPRESS 2015; 23:6102-11. [PMID: 25836834 DOI: 10.1364/oe.23.006102] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Selective Plane Illumination Microscopy (SPIM) is attractive for its ability to acquire 3D images with high 3D spatial resolution, good optical sectioning capability and high imaging speed. However, tradeoffs have to be made when a large field of view (FOV) is required, results in lower axial resolution or worse optical sectioning capability. Here, we present a novel method for 3D imaging by SPIM that is capable to maintain its high 3D spatial resolution and good optical sectioning capability within a large FOV. Instead of trying to generate a large and uniformly thick excitation light sheet, the method tiles a relative small light sheet quickly to multiple positions within the image plane by defocusing the excitation beam used to create the light sheet, and takes one additional image at each position, so that a large FOV can be imaged by repeating this process and stitching all images together. By implementing this method, light sheets with thin thickness and good excitation light confinement can be used for SPIM imaging with slightly compromised imaging speed. The method was investigated through both numerical simulation and experiments, and the imaging performance was demonstrated by imaging fluorescent particles embedded in agarose gel and live C. elegans embryos.
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37
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Pampaloni F, Chang BJ, Stelzer EHK. Light sheet-based fluorescence microscopy (LSFM) for the quantitative imaging of cells and tissues. Cell Tissue Res 2015; 360:129-41. [DOI: 10.1007/s00441-015-2144-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 02/02/2015] [Indexed: 01/04/2023]
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