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Zhang T, Yu H, Li P, Wang X, Wang F, Shi J, Liu Z, Yu P, Yang W, Wang Y, Liu L. Microsphere-Based Super-Resolution Imaging for Visualized Nanomanipulation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48093-48100. [PMID: 32960563 DOI: 10.1021/acsami.0c12126] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanomanipulation provides high operating accuracy and has been successfully applied in many fields such as nanoparticle assembly, nanowire alignment, and semiconductor device manufacturing. However, because of the limits of optical diffraction, the use of nanomanipulation is challenged by a lack of visual feedback at the nanoscale, and thus, its efficiency is difficult to be improved. In this study, we developed a novel method of microlens-enhanced nanomanipulation capable of real-time super-resolution imaging. Nanomanipulation was performed using the atomic force microscopy (AFM) mechanism by coupling a microlens to an AFM probe, and optical imaging with a minimum characteristic size of 80 nm is realized by combining the microlens with the optical imaging system. Under the conditions of fluorescent illumination and white light illumination, nanomanipulations were achieved under real-time visual guidance for fluorescent nanoparticles with a diameter of 100 nm and silver nanowires with a diameter of 80 nm, respectively. This method enables the possibility of in situ observation and manipulation, which can potentially be used for biological samples.
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Affiliation(s)
- Tianyao Zhang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Haibo Yu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Pan Li
- College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China
| | - Xiaoduo Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Feifei Wang
- Department of Chemistry and Bio-X, Stanford University, Stanford 94305, California, United States
| | - Jialin Shi
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Zhu Liu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Peng Yu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Wenguang Yang
- School of Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, China
| | - Yuechao Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Lianqing Liu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
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Kelbauskas L, Shetty R, Cao B, Wang KC, Smith D, Wang H, Chao SH, Gangaraju S, Ashcroft B, Kritzer M, Glenn H, Johnson RH, Meldrum DR. Optical computed tomography for spatially isotropic four-dimensional imaging of live single cells. SCIENCE ADVANCES 2017; 3:e1602580. [PMID: 29226240 PMCID: PMC5721812 DOI: 10.1126/sciadv.1602580] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 11/06/2017] [Indexed: 05/24/2023]
Abstract
Quantitative three-dimensional (3D) computed tomography (CT) imaging of living single cells enables orientation-independent morphometric analysis of the intricacies of cellular physiology. Since its invention, x-ray CT has become indispensable in the clinic for diagnostic and prognostic purposes due to its quantitative absorption-based imaging in true 3D that allows objects of interest to be viewed and measured from any orientation. However, x-ray CT has not been useful at the level of single cells because there is insufficient contrast to form an image. Recently, optical CT has been developed successfully for fixed cells, but this technology called Cell-CT is incompatible with live-cell imaging due to the use of stains, such as hematoxylin, that are not compatible with cell viability. We present a novel development of optical CT for quantitative, multispectral functional 4D (three spatial + one spectral dimension) imaging of living single cells. The method applied to immune system cells offers truly isotropic 3D spatial resolution and enables time-resolved imaging studies of cells suspended in aqueous medium. Using live-cell optical CT, we found a heterogeneous response to mitochondrial fission inhibition in mouse macrophages and differential basal remodeling of small (0.1 to 1 fl) and large (1 to 20 fl) nuclear and mitochondrial structures on a 20- to 30-s time scale in human myelogenous leukemia cells. Because of its robust 3D measurement capabilities, live-cell optical CT represents a powerful new tool in the biomedical research field.
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Affiliation(s)
- Laimonas Kelbauskas
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Rishabh Shetty
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Bin Cao
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Kuo-Chen Wang
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Dean Smith
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Hong Wang
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Shi-Hui Chao
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Sandhya Gangaraju
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Brian Ashcroft
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Margaret Kritzer
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
| | - Honor Glenn
- Center for Biosignatures Discovery Automation, The Biodesign Institute, Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287, USA
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Wang S, Chen X, Chang L, Xue R, Duan H, Sun Y. GMars-Q Enables Long-Term Live-Cell Parallelized Reversible Saturable Optical Fluorescence Transitions Nanoscopy. ACS NANO 2016; 10:9136-9144. [PMID: 27541837 DOI: 10.1021/acsnano.6b04254] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The recent development of reversibly switchable fluorescent proteins (RSFPs) has promoted reversible saturable optical fluorescence transitions (RESOLFT) nanoscopy as a general scheme for live-cell super-resolution imaging. However, continuous, long-term live-cell RESOLFT nanoscopy is still hindered mainly because of the unsatisfactory properties of existing RSFPs. In this work, we report GMars-Q, a monomeric RSFP with low residual off-state fluorescence and strong fatigue resistance attributed to a biphasic photobleaching process. We further demonstrate that GMars-Q is particularly suitable for long-term parallelized RESOLFT nanoscopy as it supports an order of magnitude longer imaging durations than existing RSFPs. The excellent photophysical properties of GMars-Q also suggest that it would be of general interest for other RESOLFT nanoscopic methods.
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Affiliation(s)
- Sheng Wang
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
| | - Xuanze Chen
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
| | - Lei Chang
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
| | - Ruiying Xue
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
| | - Haifeng Duan
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
| | - Yujie Sun
- State Key Laboratory of Membrane Biology, Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences and ‡Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China
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Malkusch S, Heilemann M. Extracting quantitative information from single-molecule super-resolution imaging data with LAMA - LocAlization Microscopy Analyzer. Sci Rep 2016; 6:34486. [PMID: 27703238 PMCID: PMC5050494 DOI: 10.1038/srep34486] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 09/14/2016] [Indexed: 11/30/2022] Open
Abstract
Super-resolution fluorescence microscopy revolutionizes cell biology research and provides novel insights on how proteins are organized at the nanoscale and in the cellular context. In order to extract a maximum of information, specialized tools for image analysis are necessary. Here, we introduce the LocAlization Microscopy Analyzer (LAMA), a comprehensive software tool that extracts quantitative information from single-molecule super-resolution imaging data. LAMA allows characterizing cellular structures by their size, shape, intensity, distribution, as well as the degree of colocalization with other structures. LAMA is freely available, platform-independent and designed to provide direct access to individual analysis of super-resolution data.
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Affiliation(s)
- Sebastian Malkusch
- Single Molecule Biophysics, Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Germany
| | - Mike Heilemann
- Single Molecule Biophysics, Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Germany
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Barlag B, Beutel O, Janning D, Czarniak F, Richter CP, Kommnick C, Göser V, Kurre R, Fabiani F, Erhardt M, Piehler J, Hensel M. Single molecule super-resolution imaging of proteins in living Salmonella enterica using self-labelling enzymes. Sci Rep 2016; 6:31601. [PMID: 27534893 PMCID: PMC4989173 DOI: 10.1038/srep31601] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 07/20/2016] [Indexed: 12/23/2022] Open
Abstract
The investigation of the subcellular localization, dynamics and interaction of proteins and protein complexes in prokaryotes is complicated by the small size of the cells. Super-resolution microscopy (SRM) comprise various new techniques that allow light microscopy with a resolution that can be up to ten-fold higher than conventional light microscopy. Application of SRM techniques to living prokaryotes demands the introduction of suitable fluorescent probes, usually by fusion of proteins of interest to fluorescent proteins with properties compatible to SRM. Here we describe an approach that is based on the genetically encoded self-labelling enzymes HaloTag and SNAP-tag. Proteins of interest are fused to HaloTag or SNAP-tag and cell permeable substrates can be labelled with various SRM-compatible fluorochromes. Fusions of the enzyme tags to subunits of a type I secretion system (T1SS), a T3SS, the flagellar rotor and a transcription factor were generated and analysed in living Salmonella enterica. The new approach is versatile in tagging proteins of interest in bacterial cells and allows to determine the number, relative subcellular localization and dynamics of protein complexes in living cells.
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Affiliation(s)
- Britta Barlag
- Abt. Mikrobiologie, Universität Osnabrück, Osnabrück, Germany
| | - Oliver Beutel
- Abt. Biophysik, Universität Osnabrück, Osnabrück, Germany
| | - Dennis Janning
- Abt. Neurobiologie, Universität Osnabrück, Osnabrück, Germany
| | | | | | - Carina Kommnick
- Abt. Mikrobiologie, Universität Osnabrück, Osnabrück, Germany
| | - Vera Göser
- Abt. Mikrobiologie, Universität Osnabrück, Osnabrück, Germany
| | - Rainer Kurre
- CALMOS, Universität Osnabrück, Osnabrück, Germany
| | - Florian Fabiani
- Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Marc Erhardt
- Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jacob Piehler
- Abt. Biophysik, Universität Osnabrück, Osnabrück, Germany
| | - Michael Hensel
- Abt. Mikrobiologie, Universität Osnabrück, Osnabrück, Germany
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6
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Nizamov S, Sednev MV, Bossi ML, Hebisch E, Frauendorf H, Lehnart SE, Belov VN, Hell SW. "Reduced" Coumarin Dyes with an O-Phosphorylated 2,2-Dimethyl-4-(hydroxymethyl)-1,2,3,4-tetrahydroquinoline Fragment: Synthesis, Spectra, and STED Microscopy. Chemistry 2016; 22:11631-42. [PMID: 27385071 DOI: 10.1002/chem.201601252] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Indexed: 11/11/2022]
Abstract
Large Stokes-shift coumarin dyes with an O-phosphorylated 4-(hydroxymethyl)-2,2-dimethyl-1,2,3,4-tetrahydroquinoline fragment emitting in the blue, green, and red regions of the visible spectrum were synthesized. For this purpose, N-substituted and O-protected 1,2-dihydro-7-hydroxy-2,2,4-trimethylquinoline was oxidized with SeO2 to the corresponding α,β-unsaturated aldehyde and then reduced with NaBH4 in a "one-pot" fashion to yield N-substituted and 7-O-protected 4-(hydroxymethyl)-7-hydroxy-2,2-dimethyl-1,2,3,4-tetrahydroquinoline as a common precursor to all the coumarin dyes reported here. The photophysical properties of the new dyes ("reduced coumarins") and 1,2-dihydroquinoline analogues (formal precursors) with a trisubstituted C=C bond were compared. The "reduced coumarins" were found to be more photoresistant and brighter than their 1,2-dihydroquinoline counterparts. Free carboxylate analogues, as well as their antibody conjugates (obtained from N-hydroxysuccinimidyl esters) were also prepared. All studied conjugates with secondary antibodies afforded high specificity and were suitable for fluorescence microscopy. The red-emitting coumarin dye bearing a betaine fragment at the C-3-position showed excellent performance in stimulation emission depletion (STED) microscopy.
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Affiliation(s)
- Shamil Nizamov
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Maksim V Sednev
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Mariano L Bossi
- Laboratorio de Nanoscopias Fotonicas, INQUIMAE-DQIAyQF (FCEyN), Universidad de Buenos Aires & Conicet, Buenos Aires, Argentina
| | - Elke Hebisch
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Holm Frauendorf
- Institute for Organic and Biomolecular Chemistry, Georg-August University, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Stephan E Lehnart
- Heart Research Center Göttingen, Department of Cardiology & Pulmonology, University Medical Center Göttingen, 37077, Göttingen, Germany
| | - Vladimir N Belov
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
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7
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Abstract
SIGNIFICANCE The redox code is a set of principles that defines the positioning of the nicotinamide adenine dinucleotide (NAD, NADP) and thiol/disulfide and other redox systems as well as the thiol redox proteome in space and time in biological systems. The code is richly elaborated in an oxygen-dependent life, where activation/deactivation cycles involving O₂ and H₂O₂ contribute to spatiotemporal organization for differentiation, development, and adaptation to the environment. Disruption of this organizational structure during oxidative stress represents a fundamental mechanism in system failure and disease. RECENT ADVANCES Methodology in assessing components of the redox code under physiological conditions has progressed, permitting insight into spatiotemporal organization and allowing for identification of redox partners in redox proteomics and redox metabolomics. CRITICAL ISSUES Complexity of redox networks and redox regulation is being revealed step by step, yet much still needs to be learned. FUTURE DIRECTIONS Detailed knowledge of the molecular patterns generated from the principles of the redox code under defined physiological or pathological conditions in cells and organs will contribute to understanding the redox component in health and disease. Ultimately, there will be a scientific basis to a modern redox medicine.
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Affiliation(s)
- Dean P Jones
- 1 Department of Medicine, Emory University , Atlanta, Georgia
| | - Helmut Sies
- 2 Institute for Biochemistry and Molecular Biology I, Heinrich Heine University Düsseldorf , Düsseldorf, Germany .,3 Leibniz Research Institute for Environmental Medicine, Heinrich Heine University Düsseldorf , Düsseldorf, Germany
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9
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Elgass KD, Smith EA, LeGros MA, Larabell CA, Ryan MT. Analysis of ER-mitochondria contacts using correlative fluorescence microscopy and soft X-ray tomography of mammalian cells. J Cell Sci 2015; 128:2795-804. [PMID: 26101352 DOI: 10.1242/jcs.169136] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/17/2015] [Indexed: 01/04/2023] Open
Abstract
Mitochondrial fission is important for organelle transport, quality control and apoptosis. Changes to the fission process can result in a wide variety of neurological diseases. In mammals, mitochondrial fission is executed by the GTPase dynamin-related protein 1 (Drp1; encoded by DNM1L), which oligomerizes around mitochondria and constricts the organelle. The mitochondrial outer membrane proteins Mff, MiD49 (encoded by MIEF2) and MiD51 (encoded by MIEF1) are involved in mitochondrial fission by recruiting Drp1 from the cytosol to the organelle surface. In addition, endoplasmic reticulum (ER) tubules have been shown to wrap around and constrict mitochondria before a fission event. Up to now, the presence of MiD49 and MiD51 at ER-mitochondrial division foci has not been established. Here, we combine confocal live-cell imaging with correlative cryogenic fluorescence microscopy and soft x-ray tomography to link MiD49 and MiD51 to the involvement of the ER in mitochondrial fission. We gain further insight into this complex process and characterize the 3D structure of ER-mitochondria contact sites.
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Affiliation(s)
- Kirstin D Elgass
- Hudson Institute for Medical Research, Monash Micro Imaging, Monash University, Melbourne 3168, Australia
| | - Elizabeth A Smith
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Mark A LeGros
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Carolyn A Larabell
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Michael T Ryan
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne 3800, Australia
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10
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Komis G, Mistrik M, Šamajová O, Doskočilová A, Ovečka M, Illés P, Bartek J, Šamaj J. Dynamics and organization of cortical microtubules as revealed by superresolution structured illumination microscopy. PLANT PHYSIOLOGY 2014; 165:129-48. [PMID: 24686112 PMCID: PMC4012574 DOI: 10.1104/pp.114.238477] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 03/28/2014] [Indexed: 05/07/2023]
Abstract
Plants employ acentrosomal mechanisms to organize cortical microtubule arrays essential for cell growth and differentiation. Using structured illumination microscopy (SIM) adopted for the optimal documentation of Arabidopsis (Arabidopsis thaliana) hypocotyl epidermal cells, dynamic cortical microtubules labeled with green fluorescent protein fused to the microtubule-binding domain of the mammalian microtubule-associated protein MAP4 and with green fluorescent protein-fused to the alpha tubulin6 were comparatively recorded in wild-type Arabidopsis plants and in the mitogen-activated protein kinase mutant mpk4 possessing the former microtubule marker. The mpk4 mutant exhibits extensive microtubule bundling, due to increased abundance and reduced phosphorylation of the microtubule-associated protein MAP65-1, thus providing a very useful genetic tool to record intrabundle microtubule dynamics at the subdiffraction level. SIM imaging revealed nano-sized defects in microtubule bundling, spatially resolved microtubule branching and release, and finally allowed the quantification of individual microtubules within cortical bundles. Time-lapse SIM imaging allowed the visualization of subdiffraction, short-lived excursions of the microtubule plus end, and dynamic instability behavior of both ends during free, intrabundle, or microtubule-templated microtubule growth and shrinkage. Finally, short, rigid, and nondynamic microtubule bundles in the mpk4 mutant were observed to glide along the parent microtubule in a tip-wise manner. In conclusion, this study demonstrates the potential of SIM for superresolution time-lapse imaging of plant cells, showing unprecedented details accompanying microtubule dynamic organization.
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Affiliation(s)
- George Komis
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Martin Mistrik
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Olga Šamajová
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Anna Doskočilová
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Miroslav Ovečka
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Peter Illés
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
| | - Jiri Bartek
- Centre of the Region Haná for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacký University Olomouc, 783 71 Olomouc, Czech Republic (G.K., O.Š., A.D., M.O., P.I., J.Š.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University Olomouc, 779 00 Olomouc, Czech Republic (M.M., J.B.); and
- Danish Cancer Society Research Center, DK–2100 Copenhagen, Denmark (J.B.)
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Abstract
The post-genomic era has produced a variety of new investigation technologies, techniques and approaches that may offer exciting insights into many long-standing questions of scientific research. The microtubule cytoskeleton is a highly conserved system that shows a high degree of internal complexity, is known to be integral to many cell systems and functions on a fundamental level. After decades of study, much is still unknown about microtubules in vivo from the control of dynamics in living cells to their responses to environmental changes and responses to other cellular processes. In the present article, we examine some outstanding questions in the microtubule field and propose a combination of emerging interdisciplinary approaches, i.e. high-throughput functional genomics techniques, quantitative and super-resolution microscopy, and in silico modelling, that could shed light on the systemic regulation of microtubules in cells by networks of regulatory factors. We propose that such an integrative approach is key to elucidate the function of the microtubule cytoskeleton as a complete responsive integral biological system.
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Blouin CM, Lamaze C. Interferon gamma receptor: the beginning of the journey. Front Immunol 2013; 4:267. [PMID: 24027571 PMCID: PMC3760442 DOI: 10.3389/fimmu.2013.00267] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 08/19/2013] [Indexed: 12/17/2022] Open
Abstract
Our view of endocytosis and membrane trafficking of transmembrane receptors has dramatically changed over the last 20 years. Several new endocytic routes have been discovered and mechanistically characterized in mammalian cells. Long considered as a passive means to terminate signaling through down-regulation of the number of activated receptors at the plasma membrane, it is now established that receptor endocytosis and endosomal sorting can be directly linked to the regulation of intracellular signaling pathways. The functional links between membrane trafficking of interferon receptors and JAK/STAT signaling have recently begun to be unraveled. These studies raise the exciting possibility that a certain level of signal specificity can be achieved through endocytosis and selective localization of the activated complexes within cellular membranes. The ongoing development of high-resolution cell imaging techniques with better spatial and temporal resolution gives new means of deciphering the inherent complexity of membrane trafficking and signaling. This should help to better comprehend the molecular mechanisms by which endocytosis and endosomal sorting of interferon receptors can orchestrate signaling selectivity within the JAK/STAT pathway that can be activated by as many as 60 different cytokines, growth factors, and hormones.
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Affiliation(s)
- Cédric M. Blouin
- Laboratoire Trafic, Signalisation et Ciblage Intracellulaires, Institut Curie – Centre de Recherche, Paris, France
- CNRS UMR144, Paris, France
| | - Christophe Lamaze
- Laboratoire Trafic, Signalisation et Ciblage Intracellulaires, Institut Curie – Centre de Recherche, Paris, France
- CNRS UMR144, Paris, France
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