1
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Morales-Curiel LF, Gonzalez AC, Castro-Olvera G, Lin LC(L, El-Quessny M, Porta-de-la-Riva M, Severino J, Morera LB, Venturini V, Ruprecht V, Ramallo D, Loza-Alvarez P, Krieg M. Volumetric imaging of fast cellular dynamics with deep learning enhanced bioluminescence microscopy. Commun Biol 2022; 5:1330. [PMID: 36463346 PMCID: PMC9719505 DOI: 10.1038/s42003-022-04292-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022] Open
Abstract
Bioluminescence microscopy is an appealing alternative to fluorescence microscopy, because it does not depend on external illumination, and consequently does neither produce spurious background autofluorescence, nor perturb intrinsically photosensitive processes in living cells and animals. The low photon emission of known luciferases, however, demands long exposure times that are prohibitive for imaging fast biological dynamics. To increase the versatility of bioluminescence microscopy, we present an improved low-light microscope in combination with deep learning methods to image extremely photon-starved samples enabling subsecond exposures for timelapse and volumetric imaging. We apply our method to image subcellular dynamics in mouse embryonic stem cells, epithelial morphology during zebrafish development, and DAF-16 FoxO transcription factor shuttling from the cytoplasm to the nucleus under external stress. Finally, we concatenate neural networks for denoising and light-field deconvolution to resolve intracellular calcium dynamics in three dimensions of freely moving Caenorhabditis elegans.
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Affiliation(s)
| | | | - Gustavo Castro-Olvera
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
| | - Li-Chun (Lynn) Lin
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
| | - Malak El-Quessny
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
| | | | - Jacqueline Severino
- grid.473715.30000 0004 6475 7299Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Laura Battle Morera
- grid.473715.30000 0004 6475 7299Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Valeria Venturini
- grid.473715.30000 0004 6475 7299Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain ,grid.5612.00000 0001 2172 2676Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Verena Ruprecht
- grid.473715.30000 0004 6475 7299Center for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain ,grid.5612.00000 0001 2172 2676Universitat Pompeu Fabra (UPF), Barcelona, Spain ,grid.425902.80000 0000 9601 989XICREA, Pg. Lluis Companys 23, 08010 Barcelona, Spain
| | - Diego Ramallo
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
| | - Pablo Loza-Alvarez
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
| | - Michael Krieg
- grid.5853.b0000 0004 1757 1854ICFO, Institut de Ciencies Fotòniques, Castelldefels, Spain
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2
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Cerutti E, D'Amico M, Cainero I, Dellino GI, Faretta M, Vicidomini G, Pelicci PG, Bianchini P, Diaspro A, Lanzanò L. Evaluation of sted super-resolution image quality by image correlation spectroscopy (QuICS). Sci Rep 2021; 11:20782. [PMID: 34675304 PMCID: PMC8531054 DOI: 10.1038/s41598-021-00301-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/08/2021] [Indexed: 12/05/2022] Open
Abstract
Quantifying the imaging performances in an unbiased way is of outmost importance in super-resolution microscopy. Here, we describe an algorithm based on image correlation spectroscopy (ICS) that can be used to assess the quality of super-resolution images. The algorithm is based on the calculation of an autocorrelation function and provides three different parameters: the width of the autocorrelation function, related to the spatial resolution; the brightness, related to the image contrast; the relative noise variance, related to the signal-to-noise ratio of the image. We use this algorithm to evaluate the quality of stimulated emission depletion (STED) images of DNA replication foci in U937 cells acquired under different imaging conditions. Increasing the STED depletion power improves the resolution but may reduce the image contrast. Increasing the number of line averages improves the signal-to-noise ratio but facilitates the onset of photobleaching and subsequent reduction of the image contrast. Finally, we evaluate the performances of two different separation of photons by lifetime tuning (SPLIT) approaches: the method of tunable STED depletion power and the commercially available Leica Tau-STED. We find that SPLIT provides an efficient way to improve the resolution and contrast in STED microscopy.
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Affiliation(s)
- Elena Cerutti
- Department of Physics and Astronomy "Ettore Majorana", University of Catania, Via S. Sofia 64, 95123, Catania, Italy.,Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy
| | - Morgana D'Amico
- Department of Physics and Astronomy "Ettore Majorana", University of Catania, Via S. Sofia 64, 95123, Catania, Italy
| | - Isotta Cainero
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy
| | - Gaetano Ivan Dellino
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, 20122, Milan, Italy
| | - Mario Faretta
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy
| | - Giuseppe Vicidomini
- Molecular Microscopy and Spectroscopy, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy
| | - Pier Giuseppe Pelicci
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, 20122, Milan, Italy
| | - Paolo Bianchini
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy
| | - Alberto Diaspro
- Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy.,DIFILAB, Department of Physics, University of Genoa, via Dodecaneso 33, 16143, Genoa, Italy
| | - Luca Lanzanò
- Department of Physics and Astronomy "Ettore Majorana", University of Catania, Via S. Sofia 64, 95123, Catania, Italy. .,Nanoscopy and NIC@IIT, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152, Genoa, Italy.
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3
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Wang J, Wang L, Zhang J, Yang Z, Yan W, Qu J. Improving the image quality in STED nanoscopy using frequency spectrum modulation. JOURNAL OF BIOPHOTONICS 2021; 14:e202000402. [PMID: 33314620 DOI: 10.1002/jbio.202000402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 06/12/2023]
Abstract
Since stimulated emission depletion (STED) nanoscopy was invented in 1994, this technique has been widely used in the fields of biomedicine and materials science. According to the imaging principle of STED technology, increasing the power of the depletion laser within a certain threshold can improve the resolution. However, it will cause not only severe photo-damage to the samples and photo-bleaching to the fluorophores but also serious background noise, leading to the degeneration of the quality of STED images. Here we propose a new processing method based on frequency spectrum modulation to improve the quality of STED images, abbreviated as FM-STED. We have demonstrated the performance of FM-STED in improving the signal-to-noise ratio and the resolution using fluorescent beads and biological cells as samples.
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Affiliation(s)
- Jialin Wang
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
| | - Luwei Wang
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
| | - Jia Zhang
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
| | - Zhigang Yang
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
| | - Wei Yan
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
| | - Junle Qu
- Center for Biomedical Optics and Photonics (CBOP), College of Physics and Optoeletronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
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4
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Guttman S, Kesselman E, Jacob A, Marin O, Danino D, Deutsch M, Sloutskin E. Nanostructures, Faceting, and Splitting in Nanoliter to Yoctoliter Liquid Droplets. NANO LETTERS 2019; 19:3161-3168. [PMID: 30986069 DOI: 10.1021/acs.nanolett.9b00594] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Contrary to everyday experience, where all liquid droplets assume rounded, near-spherical shapes, the temperature-tuning of liquid droplets to faceted polyhedral shapes and to spontaneous splitting has been recently demonstrated in oil-in-water emulsions. However, the elucidation of the mechanism driving these surprising effects, as well as their many potential applications, ranging from faceted nanoparticle synthesis through new industrial emulsification routes to controlled-release drug delivery within the human body, have been severely hampered by the micron-scale resolution of the light microscopy employed to date in all in situ studies. Thus, the thickness of the interfacially frozen crystalline monolayer, suggested to drive these effects, could not be directly measured, and the low limit on the droplet size still showing these effects remained unknown. In this study, we employ a combination of super-resolution stimulated emission depletion microscopy, cryogenic transmission and freeze-fracture electron microscopy, to study these effects well into the nanometer length scale. We demonstrate the occurrence of the faceting transition in droplets spanning an incredible 12 decades in volume from nanoliters to yoctoliters and directly visualize the interfacially frozen, few nanometer thick, crystalline monolayer suggested to drive these effects. Furthermore, our measurements allow placing an upper-limit estimate on the two-dimensional Young modulus of the interfacial nanometer-thick surface crystal in the smallest droplets, providing insights into the virtually unexplored domain of nanoelasticity.
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Affiliation(s)
- Shani Guttman
- Physics Department and Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat Gan 529002 , Israel
| | - Ellina Kesselman
- Russell Berrie Nanotechnology Institute (RBNI) and Department of Biotechnology and Food Engineering, Technion , Israel Institute of Technology , 32000 Haifa , Israel
| | - Avi Jacob
- The Mina and Everard Goodman Faculty of Life Sciences , Bar-Ilan University , Ramat Gan 52900 , Israel
| | - Orlando Marin
- Physics Department and Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat Gan 529002 , Israel
| | - Dganit Danino
- Russell Berrie Nanotechnology Institute (RBNI) and Department of Biotechnology and Food Engineering, Technion , Israel Institute of Technology , 32000 Haifa , Israel
| | - Moshe Deutsch
- Physics Department and Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat Gan 529002 , Israel
| | - Eli Sloutskin
- Physics Department and Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat Gan 529002 , Israel
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5
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Combs CA, Sackett DL, Knutson JR. A simple empirical algorithm for optimising depletion power and resolution for dye and system specific STED imaging. J Microsc 2019; 274:168-176. [PMID: 31012103 DOI: 10.1111/jmi.12795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 11/28/2022]
Abstract
Here we show an easy method for determining an effective dye saturation factor ('PSTED ') for STED (Stimulated Emission Depletion) microscopy. We define PSTED to be a combined microscope system plus dye factor (analogous to the traditional ground truth Is measurement, which is microscope independent) that is functionally defined as the power in the depletion beam that provides a resolution enhancement of 41% compared to confocal, according to the modified Abbe's formula for STED resolution enhancement. We show that the determination of PSTED provides insight not only into the suitability of a particular dye and the best imaging parameters to be used for an experiment, but also sets the critical value for correctly determining the point spread function (PSF) used in deconvolution of STED images. PSTED can be a function of many experimental variables, both microscope and sample related. Here we show the utility of doing PSTED determinations by (1) exploiting the simple relationship between width and a threshold-defined area provided by a Gaussian PSF, for either linear or spherical objects and (2) linearising the normally inverse hyperbolic function of resolution versus power that can determine PSTED . We show that this rearrangement allows us to determine PSTED using only a few measurements: either at a few relatively low depletion powers, on traditional bead size measurements or by finding the total area of a naturally occurring sub-limit sized biological feature (in this case, microtubules). We show the derivation of these equations and methods and the utility of its use by characterising several dyes and a local imaging parameter relevant to STED microscopy. This information is used to predict the enhancement of resolution of the point spread function necessary for post-processing deconvolution. LAY DESCRIPTION: Stimulated Emission Depletion (STED) microscopy is a fluorescence imaging superresolution technique that achieves tens of nanometres resolution. This is done by utilising a depletion laser to effectively quench (deplete) fluorescence in a donut shape overlapping the normally excited fluorescence spot. The size of the remaining (undepleted) central fluorescence spot is power dependent allowing 'tunable' resolution with the power of the STED depletion laser. This depletion power versus resolution relationship is dye and instrument dependent. We have developed a method for quickly measuring this relationship to optimise experiments based on individual dyes and microscope specific parameters. This allows for quickly optimising microscope settings and for correctly postprocessing images.
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Affiliation(s)
- Christian A Combs
- NHLBI Light Microscopy Facility, National Institutes of Health, Bethesda, Maryland, U.S.A
| | - Dan L Sackett
- NICHD Division of Basic and Translational Biophysics, National Institutes of Health, Bethesda, Maryland, U.S.A
| | - Jay R Knutson
- NHLBI Laboratory for Advanced Microscopy and Biophotonics, National Institutes of Health, Bethesda, Maryland, U.S.A
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6
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Querol-Vilaseca M, Colom-Cadena M, Pegueroles J, Nuñez-Llaves R, Luque-Cabecerans J, Muñoz-Llahuna L, Andilla J, Belbin O, Spires-Jones TL, Gelpi E, Clarimon J, Loza-Alvarez P, Fortea J, Lleó A. Nanoscale structure of amyloid-β plaques in Alzheimer's disease. Sci Rep 2019; 9:5181. [PMID: 30914681 PMCID: PMC6435662 DOI: 10.1038/s41598-019-41443-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 03/08/2019] [Indexed: 12/15/2022] Open
Abstract
Soluble amyloid-β (Aβ) is considered to be a critical component in the pathogenesis of Alzheimer’s disease (AD). Evidence suggests that these non-fibrillar Aβ assemblies are implicated in synaptic dysfunction, neurodegeneration and cell death. However, characterization of these species comes mainly from studies in cellular or animal models, and there is little data in intact human samples due to the lack of adequate optical microscopic resolution to study these small structures. Here, to achieve super-resolution in all three dimensions, we applied Array Tomography (AT) and Stimulated Emission Depletion microscopy (STED), to characterize in postmortem human brain tissue non-fibrillar Aβ structures in amyloid plaques of cases with autosomal dominant and sporadic AD. Ultrathin sections scanned with super-resolution STED microscopy allowed the detection of small Aβ structures of the order of 100 nm. We reconstructed a whole human amyloid plaque and established that plaques are formed by a dense core of higher order Aβ species (~0.022 µm3) and a peripheral halo of smaller Aβ structures (~0.003 µm3). This work highlights the potential of AT-STED for human neuropathological studies.
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Affiliation(s)
- Marta Querol-Vilaseca
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Martí Colom-Cadena
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jordi Pegueroles
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Raúl Nuñez-Llaves
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Joan Luque-Cabecerans
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Laia Muñoz-Llahuna
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jordi Andilla
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Olivia Belbin
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Tara L Spires-Jones
- The University of Edinburgh, UK Dementia Research Institute, Centre for Discovery Brain Sciences, Edinburgh, EH8 9JZ, UK
| | - Ellen Gelpi
- Neurological Tissue Bank of the Biobanc-Hospital Clinic-IDIBAPS, Barcelona, Spain.,Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - Jordi Clarimon
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Pablo Loza-Alvarez
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Juan Fortea
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Alberto Lleó
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain. .,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain.
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7
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Colom-Cadena M, Pegueroles J, Herrmann AG, Henstridge CM, Muñoz L, Querol-Vilaseca M, Martín-Paniello CS, Luque-Cabecerans J, Clarimon J, Belbin O, Núñez-Llaves R, Blesa R, Smith C, McKenzie CA, Frosch MP, Roe A, Fortea J, Andilla J, Loza-Alvarez P, Gelpi E, Hyman BT, Spires-Jones TL, Lleó A. Synaptic phosphorylated α-synuclein in dementia with Lewy bodies. Brain 2017; 140:3204-3214. [PMID: 29177427 DOI: 10.1093/brain/awx275] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 08/24/2017] [Indexed: 11/14/2022] Open
Abstract
Dementia with Lewy bodies is characterized by the accumulation of Lewy bodies and Lewy neurites in the CNS, both of which are composed mainly of aggregated α-synuclein phosphorylated at Ser129. Although phosphorylated α-synuclein is believed to exert toxic effects at the synapse in dementia with Lewy bodies and other α-synucleinopathies, direct evidence for the precise synaptic localization has been difficult to achieve due to the lack of adequate optical microscopic resolution to study human synapses. In the present study we applied array tomography, a microscopy technique that combines ultrathin sectioning of tissue with immunofluorescence allowing precise identification of small structures, to quantitatively investigate the synaptic phosphorylated α-synuclein pathology in dementia with Lewy bodies. We performed array tomography on human brain samples from five patients with dementia with Lewy bodies, five patients with Alzheimer's disease and five healthy control subjects to analyse the presence of phosphorylated α-synuclein immunoreactivity at the synapse and their relationship with synapse size. Main analyses were performed in blocks from cingulate cortex and confirmed in blocks from the striatum of cases with dementia with Lewy bodies. A total of 1 318 700 single pre- or postsynaptic terminals were analysed. We found that phosphorylated α-synuclein is present exclusively in dementia with Lewy bodies cases, where it can be identified in the form of Lewy bodies, Lewy neurites and small aggregates (<0.16 µm3). Between 19% and 25% of phosphorylated α-synuclein deposits were found in presynaptic terminals mainly in the form of small aggregates. Synaptic terminals that co-localized with small aggregates of phosphorylated α-synuclein were significantly larger than those that did not. Finally, a gradient of phosphorylated α-synuclein aggregation in synapses (pre > pre + post > postsynaptic) was observed. These results indicate that phosphorylated α-synuclein is found at the presynaptic terminals of dementia with Lewy bodies cases mainly in the form of small phosphorylated α-synuclein aggregates that are associated with changes in synaptic morphology. Overall, our data support the notion that pathological phosphorylated α-synuclein may disrupt the structure and function of the synapse in dementia with Lewy bodies.
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Affiliation(s)
- Martí Colom-Cadena
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jordi Pegueroles
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Abigail G Herrmann
- The University of Edinburgh, UK Dementia Research Institute, Centre for Discovery Brain Sciences, Edinburgh Neuroscience, Euan MacDonald Centre, and Centre for Dementia Prevention, Edinburgh, EH8 9JZ, UK
| | - Christopher M Henstridge
- The University of Edinburgh, UK Dementia Research Institute, Centre for Discovery Brain Sciences, Edinburgh Neuroscience, Euan MacDonald Centre, and Centre for Dementia Prevention, Edinburgh, EH8 9JZ, UK
| | - Laia Muñoz
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Marta Querol-Vilaseca
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Carla San Martín-Paniello
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Joan Luque-Cabecerans
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jordi Clarimon
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Olivia Belbin
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Raúl Núñez-Llaves
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Rafael Blesa
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Colin Smith
- University of Edinburgh, Centre for Clinical Brain Sciences, Edinburgh, UK
| | | | - Matthew P Frosch
- Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Allyson Roe
- Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Juan Fortea
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Jordi Andilla
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Pablo Loza-Alvarez
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Ellen Gelpi
- Neurological Tissue Bank of the Biobanc-Hospital Clinic-IDIBAPS, Barcelona Spain
| | - Bradley T Hyman
- Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Tara L Spires-Jones
- The University of Edinburgh, UK Dementia Research Institute, Centre for Discovery Brain Sciences, Edinburgh Neuroscience, Euan MacDonald Centre, and Centre for Dementia Prevention, Edinburgh, EH8 9JZ, UK
| | - Alberto Lleó
- Memory Unit, Department of Neurology, Institut d'Investigacions Biomèdiques Sant Pau - Hospital de Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
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