1
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Proksch K, Werner F, Keller-Findeisen J, Ta H, Munk A. Toward quantitative super-resolution microscopy: molecular maps with statistical guarantees. Microscopy (Oxf) 2023:dfad053. [PMID: 37986580 DOI: 10.1093/jmicro/dfad053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 10/02/2023] [Accepted: 11/03/2023] [Indexed: 11/22/2023] Open
Abstract
Quantifying the number of molecules from fluorescence microscopy measurements is an important topic in cell biology and medical research. In this work, we present a consecutive algorithm for super-resolution (stimulated emission depletion (STED)) scanning microscopy that provides molecule counts in automatically generated image segments and offers statistical guarantees in form of asymptotic confidence intervals. To this end, we first apply a multiscale scanning procedure on STED microscopy measurements of the sample to obtain a system of significant regions, each of which contains at least one molecule with prescribed uniform probability. This system of regions will typically be highly redundant and consists of rectangular building blocks. To choose an informative but non-redundant subset of more naturally shaped regions, we hybridize our system with the result of a generic segmentation algorithm. The diameter of the segments can be of the order of the resolution of the microscope. Using multiple photon coincidence measurements of the same sample in confocal mode, we are then able to estimate the brightness and number of molecules and give uniform confidence intervals on the molecule counts for each previously constructed segment. In other words, we establish a so-called molecular map with uniform error control. The performance of the algorithm is investigated on simulated and real data.
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Affiliation(s)
- Katharina Proksch
- Faculty of Electrical Engineering, Mathematics and Computer Science, Universiteit Twente, Enschede, The Netherlands
| | - Frank Werner
- Institute of Mathematics, University of Würzburg, Germany
| | - Jan Keller-Findeisen
- Max-Planck-Institut für multidisziplinäre Naturwissenschaften, Göttingen, Germany
| | - Haisen Ta
- Center for Hybrid Nanostructures, Universität Hamburg, Germany
| | - Axel Munk
- Institute for Mathematical Stochastics, University of Göttingen, Germany
- Felix Bernstein Institute for Mathematical Statistics in the Bioscience, University of Göttingen, Germany
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2
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Yang J, Liu C, Lan YJ, Ta H, Wang YW. [The hearing self-protection behavior and internal factors of workers exposured to occupational noise]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 37:773-777. [PMID: 31726510 DOI: 10.3760/cma.j.issn.1001-9391.2019.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the hearing self-protection behavior patterns and internal factors of workers exposured to occupational noise in an aircraft manufacturing industry based on health belief model, so as to provide reference for further health promotion programs and intervention measures. Methods: A total of 1600 front-line workers were selected from 10 units of an aircraft manufacturing enterprise by cluster sampling method. The basic and occupational information of employees were collected, and a self-reported questionnaire was designed according to the health belief model to acquire the hearing self-protection behaviors of workers. Results: There were significant differences in the perceived severity, perceived benefit, perceived impairment, self-efficacy and behavioral incentive scores of different hearing self-protection behaviors among the noise-causing workers (P<0.05). There were significant differences in the distribution of hearing self-protection behaviors among different genders, ages, education levels, length of service, initial noise exposure time and cumulative noise reception time (P<0.05). The perceived benefits, perceived barriers, behavioral incentives, self-efficacy scores, and educational attainment of the noise-causing workers were all related to the type of hearing self-protection behavior (P<0.05) . Conclusion: The educational level and health belief model can predict the hearing self-protection behavior patterns of front-line workers to some extent, more attention should be paid to the monitoring of the well-educated employees.
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Affiliation(s)
- J Yang
- Department of Environmental Health and Occupational Medicine, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, China
| | - C Liu
- Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu 610031, China
| | - Y J Lan
- Department of Environmental Health and Occupational Medicine, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, China
| | - H Ta
- Department of Environmental Health and Occupational Medicine, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, China
| | - Y W Wang
- Department of Occupational Risk Assessment, West China School of Public Health and West China Fourth Hospital, Chengdu 610041, China
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3
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Kamper M, Ta H, Jensen NA, Hell SW, Jakobs S. Near-infrared STED nanoscopy with an engineered bacterial phytochrome. Nat Commun 2018; 9:4762. [PMID: 30420676 PMCID: PMC6232180 DOI: 10.1038/s41467-018-07246-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 10/17/2018] [Indexed: 01/18/2023] Open
Abstract
The near infrared (NIR) optical window between the cutoff for hemoglobin absorption at 650 nm and the onset of increased water absorption at 900 nm is an attractive, yet largely unexplored, spectral regime for diffraction-unlimited super-resolution fluorescence microscopy (nanoscopy). We developed the NIR fluorescent protein SNIFP, a bright and photostable bacteriophytochrome, and demonstrate its use as a fusion tag in live-cell microscopy and STED nanoscopy. We further demonstrate dual color red-confocal/NIR-STED imaging by co-expressing SNIFP with a conventional red fluorescent protein.
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Affiliation(s)
- Maria Kamper
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Nickels A Jensen
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Stefan Jakobs
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany. .,Department of Neurology, University Medical Center Göttingen, Göttingen, Germany.
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4
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Rossboth B, Arnold AM, Ta H, Platzer R, Kellner F, Huppa JB, Brameshuber M, Baumgart F, Schütz GJ. TCRs are randomly distributed on the plasma membrane of resting antigen-experienced T cells. Nat Immunol 2018; 19:821-827. [PMID: 30013143 PMCID: PMC6071872 DOI: 10.1038/s41590-018-0162-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/14/2018] [Indexed: 12/29/2022]
Abstract
The main function of T cells is to identify harmful antigens as quickly and precisely as possible. Super-resolution microscopy data have indicated that global clustering of T cell antigen receptors (TCRs) occurs before T cell activation. Such pre-activation clustering has been interpreted as representing a potential regulatory mechanism that fine tunes the T cell response. We found here that apparent TCR nanoclustering could be attributed to overcounting artifacts inherent to single-molecule-localization microscopy. Using complementary super-resolution approaches and statistical image analysis, we found no indication of global nanoclustering of TCRs on antigen-experienced CD4+ T cells under non-activating conditions. We also used extensive simulations of super-resolution images to provide quantitative limits for the degree of randomness of the TCR distribution. Together our results suggest that the distribution of TCRs on the plasma membrane is optimized for fast recognition of antigen in the first phase of T cell activation.
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Affiliation(s)
| | | | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - René Platzer
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Florian Kellner
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Johannes B Huppa
- Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
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5
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Brameshuber M, Kellner F, Rossboth BK, Ta H, Alge K, Sevcsik E, Göhring J, Axmann M, Baumgart F, Gascoigne NRJ, Davis SJ, Stockinger H, Schütz GJ, Huppa JB. Monomeric TCRs drive T cell antigen recognition. Nat Immunol 2018; 19:487-496. [PMID: 29662172 DOI: 10.1038/s41590-018-0092-4] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 03/15/2018] [Indexed: 11/09/2022]
Abstract
T cell antigen recognition requires T cell antigen receptors (TCRs) engaging MHC-embedded antigenic peptides (pMHCs) within the contact region of a T cell with its conjugated antigen-presenting cell. Despite micromolar TCR:pMHC affinities, T cells respond to even a single antigenic pMHC, and higher-order TCRs have been postulated to maintain high antigen sensitivity and trigger signaling. We interrogated the stoichiometry of TCRs and their associated CD3 subunits on the surface of living T cells through single-molecule brightness and single-molecule coincidence analysis, photon-antibunching-based fluorescence correlation spectroscopy and Förster resonance energy transfer measurements. We found exclusively monomeric TCR-CD3 complexes driving the recognition of antigenic pMHCs, which underscores the exceptional capacity of single TCR-CD3 complexes to elicit robust intracellular signaling.
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Affiliation(s)
| | - Florian Kellner
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | | | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Kevin Alge
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | - Eva Sevcsik
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Janett Göhring
- Institute of Applied Physics, TU Wien, Vienna, Austria.,Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | - Markus Axmann
- Center for Pathobiochemistry and Genetics, Institute of Medical Chemistry and Pathobiochemistry, Medical University of Vienna, Vienna, Austria
| | | | - Nicholas R J Gascoigne
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Simon J Davis
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Hannes Stockinger
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | | | - Johannes B Huppa
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria.
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6
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Butkevich AN, Ta H, Ratz M, Stoldt S, Jakobs S, Belov VN, Hell SW. Two-Color 810 nm STED Nanoscopy of Living Cells with Endogenous SNAP-Tagged Fusion Proteins. ACS Chem Biol 2018; 13:475-480. [PMID: 28933823 DOI: 10.1021/acschembio.7b00616] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A 810 nm STED nanoscopy setup and an appropriate combination of two fluorescent dyes (Si-rhodamine 680SiR and carbopyronine 610CP) have been developed for near-IR live-cell super-resolution imaging. Vimentin endogenously tagged using the CRISPR/Cas9 approach with the SNAP tag, together with a noncovalent tubulin label, provided reliable and cell-to-cell reproducible dual-color confocal and STED imaging of the cytoskeleton in living cells.
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Affiliation(s)
- Alexey N. Butkevich
- Department
of NanoBiophotonics, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Haisen Ta
- Department
of NanoBiophotonics, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Michael Ratz
- Department
of NanoBiophotonics, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Stefan Stoldt
- Department
of NanoBiophotonics, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Stefan Jakobs
- Department
of NanoBiophotonics, Max-Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
- Department
of Neurology, University of Göttingen Medical Faculty, Robert-Koch-Str.
40, 37075 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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Brameshuber M, Kellner F, Rossboth BK, Ta H, Alge K, Sevcsik E, Axmann M, Gascoigne NR, Davis SJ, Stockinger H, Schuetz GJ, Huppa JB. Monomeric TCR-CD3 Complexes Drive T-Cell Antigen Recognition. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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8
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Baumgart F, Rossboth BK, Arnold AM, Brameshuber M, Ta H, Platzer R, Huppa JB, Schütz GJ. Superresolution Microscopy of the T Cell Receptor in the Immunological Synapse. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.2923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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9
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Meineke DNH, Bossi ML, Ta H, Belov VN, Hell SW. Bichromophoric Compounds with Orthogonally and Parallelly Arranged Chromophores Separated by Rigid Spacers. Chemistry 2017; 23:2469-2475. [PMID: 27922726 DOI: 10.1002/chem.201605587] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Dirk N. H. Meineke
- NanoBiophotonics Department; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
| | - Mariano L. Bossi
- NanoBiophotonics Department; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
| | - Haisen Ta
- NanoBiophotonics Department; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
| | - Vladimir N. Belov
- NanoBiophotonics Department; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
| | - Stefan W. Hell
- NanoBiophotonics Department; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
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10
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Abstract
Novel STED probe was prepared through aptamer functionalized silver clusters, which preserve specific affinity with smaller size and more photostability.
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Affiliation(s)
- Lan Wang
- Laboratory of Environmental Sciences and Technology
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences
- Urumqi 830011
| | - Haisen Ta
- Department of NanoBiophotonics
- Max Planck Institute for Biophysical Chemistry
- Göttingen 37077
- Germany
| | - Chaitanya Ullal
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Fu Wang
- Laboratory of Environmental Sciences and Technology
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences
- Urumqi 830011
| | - Chuanyi Wang
- Laboratory of Environmental Sciences and Technology
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences
- Urumqi 830011
| | - Guohui Dong
- Laboratory of Environmental Sciences and Technology
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences
- Urumqi 830011
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11
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Lukinavičius G, Reymond L, Umezawa K, Sallin O, D'Este E, Göttfert F, Ta H, Hell SW, Urano Y, Johnsson K. Fluorogenic Probes for Multicolor Imaging in Living Cells. J Am Chem Soc 2016; 138:9365-8. [PMID: 27420907 DOI: 10.1021/jacs.6b04782] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Here we present a far-red, silicon-rhodamine-based fluorophore (SiR700) for live-cell multicolor imaging. SiR700 has excitation and emission maxima at 690 and 715 nm, respectively. SiR700-based probes for F-actin, microtubules, lysosomes, and SNAP-tag are fluorogenic, cell-permeable, and compatible with superresolution microscopy. In conjunction with probes based on the previously introduced carboxy-SiR650, SiR700-based probes permit multicolor live-cell superresolution microscopy in the far-red, thus significantly expanding our capacity for imaging living cells.
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Affiliation(s)
- Gražvydas Lukinavičius
- Institute of Bioengineering, NCCR in Chemical Biology, Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne, Switzerland.,Department of NanoBiophotonics, Max-Planck-Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Luc Reymond
- Institute of Bioengineering, NCCR in Chemical Biology, Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne, Switzerland
| | - Keitaro Umezawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Olivier Sallin
- Institute of Bioengineering, NCCR in Chemical Biology, Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne, Switzerland
| | - Elisa D'Este
- Department of NanoBiophotonics, Max-Planck-Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Fabian Göttfert
- Department of NanoBiophotonics, Max-Planck-Institute for Biophysical Chemistry , Am Fassberg 11, 37077 Göttingen, Germany
| | - Haisen Ta
- 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
| | - Yasuteru Urano
- Graduate School of Pharmaceutical Sciences, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
| | - Kai Johnsson
- Institute of Bioengineering, NCCR in Chemical Biology, Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne, Switzerland
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12
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Vicidomini G, Ta H, Honigmann A, Mueller V, Clausen MP, Waithe D, Galiani S, Sezgin E, Diaspro A, Hell S, Eggeling C. STED-FLCS: An Advanced Tool to Reveal Spatiotemporal Heterogeneity of Molecular Membrane Dynamics. Nano Lett 2015; 15:5912-8. [PMID: 26235350 PMCID: PMC4819494 DOI: 10.1021/acs.nanolett.5b02001] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 07/29/2015] [Indexed: 05/22/2023]
Abstract
Heterogeneous diffusion dynamics of molecules play an important role in many cellular signaling events, such as of lipids in plasma membrane bioactivity. However, these dynamics can often only be visualized by single-molecule and super-resolution optical microscopy techniques. Using fluorescence lifetime correlation spectroscopy (FLCS, an extension of fluorescence correlation spectroscopy, FCS) on a super-resolution stimulated emission depletion (STED) microscope, we here extend previous observations of nanoscale lipid dynamics in the plasma membrane of living mammalian cells. STED-FLCS allows an improved determination of spatiotemporal heterogeneity in molecular diffusion and interaction dynamics via a novel gated detection scheme, as demonstrated by a comparison between STED-FLCS and previous conventional STED-FCS recordings on fluorescent phosphoglycerolipid and sphingolipid analogues in the plasma membrane of live mammalian cells. The STED-FLCS data indicate that biophysical and biochemical parameters such as the affinity for molecular complexes strongly change over space and time within a few seconds. Drug treatment for cholesterol depletion or actin cytoskeleton depolymerization not only results in the already previously observed decreased affinity for molecular interactions but also in a slight reduction of the spatiotemporal heterogeneity. STED-FLCS specifically demonstrates a significant improvement over previous gated STED-FCS experiments and with its improved spatial and temporal resolution is a novel tool for investigating how heterogeneities of the cellular plasma membrane may regulate biofunctionality.
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Affiliation(s)
- Giuseppe Vicidomini
- Nanoscopy, Nanophysics, Instituto
Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
- E-mail:
| | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
| | - Alf Honigmann
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
- Max Planck Institute for Molecular Cell Biology and Genetics, Pfotenhauerstr. 108, 01309 Dresden, Germany
| | - Veronika Mueller
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
| | - Mathias P. Clausen
- MRC Human Immunology Unit and Wolfson Imaging Centre
Oxford, Weatherall Institute of Molecular Medicine, Radcliffe Department
of Molecular Medicine, University of Oxford, OX3 9DS Oxford, United Kingdom
- MEMPHYS−Center for Biomembrane Physics, University of Southern Denmark, Campusvej 55, Odense MDK-5230, Denmark
| | - Dominic Waithe
- MRC Human Immunology Unit and Wolfson Imaging Centre
Oxford, Weatherall Institute of Molecular Medicine, Radcliffe Department
of Molecular Medicine, University of Oxford, OX3 9DS Oxford, United Kingdom
| | - Silvia Galiani
- MRC Human Immunology Unit and Wolfson Imaging Centre
Oxford, Weatherall Institute of Molecular Medicine, Radcliffe Department
of Molecular Medicine, University of Oxford, OX3 9DS Oxford, United Kingdom
| | - Erdinc Sezgin
- MRC Human Immunology Unit and Wolfson Imaging Centre
Oxford, Weatherall Institute of Molecular Medicine, Radcliffe Department
of Molecular Medicine, University of Oxford, OX3 9DS Oxford, United Kingdom
| | - Alberto Diaspro
- Nanoscopy, Nanophysics, Instituto
Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
| | - Stefan
W. Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
| | - Christian Eggeling
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany
- MRC Human Immunology Unit and Wolfson Imaging Centre
Oxford, Weatherall Institute of Molecular Medicine, Radcliffe Department
of Molecular Medicine, University of Oxford, OX3 9DS Oxford, United Kingdom
- E-mail:
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13
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Kolmakov K, Hebisch E, Wolfram T, Nordwig LA, Wurm CA, Ta H, Westphal V, Belov VN, Hell SW. Far-Red Emitting Fluorescent Dyes for Optical Nanoscopy: Fluorinated Silicon-Rhodamines (SiRF Dyes) and Phosphorylated Oxazines. Chemistry 2015; 21:13344-56. [DOI: 10.1002/chem.201501394] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 06/16/2015] [Indexed: 12/30/2022]
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14
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Ta H, Keller J, Haltmeier M, Saka SK, Schmied J, Opazo F, Tinnefeld P, Munk A, Hell SW. Mapping molecules in scanning far-field fluorescence nanoscopy. Nat Commun 2015; 6:7977. [PMID: 26269133 PMCID: PMC4557268 DOI: 10.1038/ncomms8977] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 07/02/2015] [Indexed: 12/11/2022] Open
Abstract
In fluorescence microscopy, the distribution of the emitting molecule number in space is usually obtained by dividing the measured fluorescence by that of a single emitter. However, the brightness of individual emitters may vary strongly in the sample or be inaccessible. Moreover, with increasing (super-) resolution, fewer molecules are found per pixel, making this approach unreliable. Here we map the distribution of molecules by exploiting the fact that a single molecule emits only a single photon at a time. Thus, by analysing the simultaneous arrival of multiple photons during confocal imaging, we can establish the number and local brightness of typically up to 20 molecules per confocal (diffraction sized) recording volume. Subsequent recording by stimulated emission depletion microscopy provides the distribution of the number of molecules with subdiffraction resolution. The method is applied to mapping the three-dimensional nanoscale organization of internalized transferrin receptors on human HEK293 cells. Mapping the distribution of fluorescence molecules, rather than just their emission intensity, can improve super-resolution fluorescence microscopy. Here, the authors present a general solution for rendering the number of fluorescent molecules recorded by confocal or STED microscopy.
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Affiliation(s)
- Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Jan Keller
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Markus Haltmeier
- 1] Statistical Inverse Problems in Biophysics Group, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany [2] Department of Mathematics, University of Innsbruck, Innsbruck 6020, Austria
| | - Sinem K Saka
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen 37073, Germany
| | - Jürgen Schmied
- NanoBioSciences Group, Institute of Physical and Theoretical Chemistry, Braunschweig University of Technology, Braunschweig 38106, Germany
| | - Felipe Opazo
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen 37073, Germany
| | - Philip Tinnefeld
- NanoBioSciences Group, Institute of Physical and Theoretical Chemistry, Braunschweig University of Technology, Braunschweig 38106, Germany
| | - Axel Munk
- 1] Statistical Inverse Problems in Biophysics Group, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany [2] Institute for Mathematical Stochastics and Felix Bernstein Institute for Mathematical Statistics in the Biosciences, University of Göttingen, Göttingen 37077, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
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Ta H, Keller J, Haltmeier M, Saka SK, Schmied J, Opazo F, Tinnefeld P, Munk A, Hell SW. Mapping molecules in scanning far-field fluorescence nanoscopy. Nat Commun 2015. [PMID: 26269133 DOI: 10.1938/ncomms8977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023] Open
Abstract
In fluorescence microscopy, the distribution of the emitting molecule number in space is usually obtained by dividing the measured fluorescence by that of a single emitter. However, the brightness of individual emitters may vary strongly in the sample or be inaccessible. Moreover, with increasing (super-) resolution, fewer molecules are found per pixel, making this approach unreliable. Here we map the distribution of molecules by exploiting the fact that a single molecule emits only a single photon at a time. Thus, by analysing the simultaneous arrival of multiple photons during confocal imaging, we can establish the number and local brightness of typically up to 20 molecules per confocal (diffraction sized) recording volume. Subsequent recording by stimulated emission depletion microscopy provides the distribution of the number of molecules with subdiffraction resolution. The method is applied to mapping the three-dimensional nanoscale organization of internalized transferrin receptors on human HEK293 cells.
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Affiliation(s)
- Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Jan Keller
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Markus Haltmeier
- 1] Statistical Inverse Problems in Biophysics Group, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany [2] Department of Mathematics, University of Innsbruck, Innsbruck 6020, Austria
| | - Sinem K Saka
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen 37073, Germany
| | - Jürgen Schmied
- NanoBioSciences Group, Institute of Physical and Theoretical Chemistry, Braunschweig University of Technology, Braunschweig 38106, Germany
| | - Felipe Opazo
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen 37073, Germany
| | - Philip Tinnefeld
- NanoBioSciences Group, Institute of Physical and Theoretical Chemistry, Braunschweig University of Technology, Braunschweig 38106, Germany
| | - Axel Munk
- 1] Statistical Inverse Problems in Biophysics Group, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany [2] Institute for Mathematical Stochastics and Felix Bernstein Institute for Mathematical Statistics in the Biosciences, University of Göttingen, Göttingen 37077, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
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Wang Y, Arjonen A, Pouwels J, Ta H, Pausch P, Bange G, Engel U, Pan X, Fackler OT, Ivaska J, Grosse R. Formin-like 2 Promotes β1-Integrin Trafficking and Invasive Motility Downstream of PKCα. Dev Cell 2015; 34:475-83. [PMID: 26256210 DOI: 10.1016/j.devcel.2015.06.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 04/01/2015] [Accepted: 06/18/2015] [Indexed: 11/28/2022]
Abstract
Regulated turnover of integrin receptors is essential for cell adhesion and migration. Pathways selectively regulating β1-integrin recycling are implicated in cancer invasion and metastasis, yet proteins required for the internalization of this pro-invasive integrin remain to be identified. Here, we uncover formin-like 2 (FMNL2) as a critical regulator of β1-integrin internalization downstream of protein kinase C (PKC). PKCα associates with and phosphorylates FMNL2 at S1072 within its Diaphanous autoregulatory region, leading to the release of formin autoinhibition. Phosphorylation of FMNL2 triggers its rapid relocation and promotes its interaction with the cytoplasmic tails of the α-integrin subunits for β1-integrin endocytosis. FMNL2 drives β1-integrin internalization and invasive motility in a phosphorylation-dependent manner, while a FMNL2 mutant defective in actin assembly interferes with β1-integrin endocytosis and cancer cell invasion. Our data establish a role for FMNL2 in the regulation of β1-integrin and provide a mechanistic understanding of the function of FMNL2 in cancer invasiveness.
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Affiliation(s)
- Ying Wang
- Institute of Pharmacology, University of Marburg, 35043 Marburg, Germany
| | - Antti Arjonen
- Turku Centre for Biotechnology, University of Turku, 20520 Turku, Finland
| | - Jeroen Pouwels
- Turku Centre for Biotechnology, University of Turku, 20520 Turku, Finland
| | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Patrick Pausch
- LOEWE Center for Synthetic Microbiology (SYNMIKRO) and Department of Chemistry, University of Marburg, 35043 Marburg, Germany
| | - Gert Bange
- LOEWE Center for Synthetic Microbiology (SYNMIKRO) and Department of Chemistry, University of Marburg, 35043 Marburg, Germany
| | - Ulrike Engel
- Nikon Imaging Center and COS, University of Heidelberg, 69120 Heidelberg, Germany
| | - Xiaoyu Pan
- Department of Infectious Diseases, Integrative Virology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Oliver T Fackler
- Department of Infectious Diseases, Integrative Virology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Johanna Ivaska
- Turku Centre for Biotechnology, University of Turku, 20520 Turku, Finland; Department of Biochemistry and Food Chemistry, University of Turku, 20520 Turku, Finland
| | - Robert Grosse
- Institute of Pharmacology, University of Marburg, 35043 Marburg, Germany.
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Ta H, Prabhu S, Leitner E, Jia F, Putnam K, Bassler N, Peter K, Hagemeyer C. Targeted molecular imaging and cell homing in cardiovascular disease via antibody-sortagging. Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lukinavičius G, Reymond L, D'Este E, Masharina A, Göttfert F, Ta H, Güther A, Fournier M, Rizzo S, Waldmann H, Blaukopf C, Sommer C, Gerlich DW, Arndt HD, Hell SW, Johnsson K. Fluorogenic probes for live-cell imaging of the cytoskeleton. Nat Methods 2014; 11:731-3. [PMID: 24859753 DOI: 10.1038/nmeth.2972] [Citation(s) in RCA: 526] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 04/24/2014] [Indexed: 12/21/2022]
Abstract
We introduce far-red, fluorogenic probes that combine minimal cytotoxicity with excellent brightness and photostability for fluorescence imaging of actin and tubulin in living cells. Applied in stimulated emission depletion (STED) microscopy, they reveal the ninefold symmetry of the centrosome and the spatial organization of actin in the axon of cultured rat neurons with a resolution unprecedented for imaging cytoskeletal structures in living cells.
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Affiliation(s)
- Gražvydas Lukinavičius
- 1] Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. [2]
| | - Luc Reymond
- 1] Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. [2] National Centre of Competence of Research in Chemical Biology, Lausanne, Switzerland. [3]
| | - Elisa D'Este
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Anastasiya Masharina
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Fabian Göttfert
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Haisen Ta
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Angelika Güther
- Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University, Jena, Germany
| | - Mathias Fournier
- Bioimaging and Optics Platform, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Stefano Rizzo
- Max Planck Institute of Molecular Physiology, Dortmund, Germany
| | | | - Claudia Blaukopf
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Christoph Sommer
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Daniel W Gerlich
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Hans-Dieter Arndt
- Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University, Jena, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Kai Johnsson
- 1] Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. [2] National Centre of Competence of Research in Chemical Biology, Lausanne, Switzerland
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Vicidomini G, Schönle A, Ta H, Han KY, Moneron G, Eggeling C, Hell SW. STED nanoscopy with time-gated detection: theoretical and experimental aspects. PLoS One 2013; 8:e54421. [PMID: 23349884 PMCID: PMC3548795 DOI: 10.1371/journal.pone.0054421] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 12/11/2012] [Indexed: 11/24/2022] Open
Abstract
In a stimulated emission depletion (STED) microscope the region in which fluorescence markers can emit spontaneously shrinks with continued STED beam action after a singular excitation event. This fact has been recently used to substantially improve the effective spatial resolution in STED nanoscopy using time-gated detection, pulsed excitation and continuous wave (CW) STED beams. We present a theoretical framework and experimental data that characterize the time evolution of the effective point-spread-function of a STED microscope and illustrate the physical basis, the benefits, and the limitations of time-gated detection both for CW and pulsed STED lasers. While gating hardly improves the effective resolution in the all-pulsed modality, in the CW-STED modality gating strongly suppresses low spatial frequencies in the image. Gated CW-STED nanoscopy is in essence limited (only) by the reduction of the signal that is associated with gating. Time-gated detection also reduces/suppresses the influence of local variations of the fluorescence lifetime on STED microscopy resolution.
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Wurm CA, Kolmakov K, Göttfert F, Ta H, Bossi M, Schill H, Berning S, Jakobs S, Donnert G, Belov VN, Hell SW. Novel red fluorophores with superior performance in STED microscopy. ACTA ACUST UNITED AC 2012. [DOI: 10.1186/2192-2853-1-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ta H, Kiel A, Wahl M, Herten DP. Experimental approach to extend the range for counting fluorescent molecules based on photon-antibunching. Phys Chem Chem Phys 2010; 12:10295-300. [PMID: 20603676 DOI: 10.1039/c0cp00363h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In single-molecule fluorescence spectroscopy photon-antibunching is frequently used to prove the occurrence of single fluorophores. Furthermore, the relative frequency of coincident photon pairs was also used to determine the number of fluorophores in the diffraction limited observation volume of a confocal microscope. However, the ability to count fluorophores is so far limited to approximately 3 molecules due to saturation of the calibration curve with increasing number of fluorophores. Recently, we introduced a novel theoretical framework for counting the number of emitting molecules by analyzing photon-distributions acquired with a confocal microscope using four single-photon detectors. Here, we present the experimental realization of the proposed scheme in a confocal setup using novel multi-channel photon-counting electronics and DNA constructs that were labelled with five fluorophores. Our experimental results give a clear correlation between the number of estimated fluorophores and the number of bleaching steps for DNA probes conjugated with five ATTO647N labels with an error of approximately 20%. Moreover, we could acquire experimental data for up to 15 fluorophores indicating the simultaneous occurrence of three DNA probes. Our experiments put into perspective that the analysis of photon-distributions acquired with four detection channels is suited to count the number of fluorescently labelled molecules in larger aggregates or clusters with potential for applications in molecular and cell biology and for time-resolved analysis of multi-chromophoric compounds in material sciences.
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Affiliation(s)
- Haisen Ta
- Cellnetworks Cluster and Institute for Physical Chemistry, Heidelberg Univ., Im Neuenheimer Feld 267, D-69214 Heidelberg, Germany
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MacDougall M, Thiemann F, Ta H, Hsu P, Chen LS, Snead ML. Temperature sensitive simian virus 40 large T antigen immortalization of murine odontoblast cell cultures: establishment of clonal odontoblast cell line. Connect Tissue Res 1995; 33:97-103. [PMID: 7554969 DOI: 10.3109/03008209509016988] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
During tooth formation instructive epithelial-mesenchymal interactions result in the cytodifferentiation of ectomesenchymal cells into odontoblasts which produce the dentin extracellular matrix (DECM). The purpose of our study was to establish a stable murine odontoblast cell line by immortalization of odontoblasts using retrovirus transfection. In order to accomplish this goal, we utilized a previously characterized odontoblast monolayer cell culture system supportive of odontoblast cytodifferentiation from dental papilla mesenchyme (DPM), expression and secretion of a DECM and dentin biomineralization. First mandibular molars from E-18 Swiss Webster mice were dissected, the DPM isolated, and pulp cells dissociated. Pulp cells (5 x 10(5)/well) were plated as monolayers and grown in alpha-MEM supplemented with 10% FCS, 100 units/ml penicillin and streptomycin, 50 micrograms/ml ascorbic acid. Cultures were maintained for 6 days at 37 degrees C in a humidified atmosphere of 95% air and 5% CO2, with media changes every two days. Immortalization was performed using a recombinant defective retrovirus containing the temperature sensitive SV-40 large T antigen cDNA and the neomycin (G418) resistance gene recovered from CRE packaging cells. Cultures were infected for 24 h with CRE conditioned medium containing 8 micrograms/ml of polybrene, the media was replaced with selective media containing 300 micrograms/ml of G418, and the cultures incubated at 33 degrees C for one month with media changes every 3-5 days. Neomycin resistant cells were cloned by serial dilution to single cells in 96-well culture plates and grown in selection medium at 33 degrees C.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M MacDougall
- University of Texas Health Science Center at San Antonio, Dental School, Department of Pediatric Dentistry 78284-7888, USA
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