1
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Lujan P, Garcia-Cabau C, Wakana Y, Vera Lillo J, Rodilla-Ramírez C, Sugiura H, Malhotra V, Salvatella X, Garcia-Parajo MF, Campelo F. Sorting of secretory proteins at the trans-Golgi network by human TGN46. eLife 2024; 12:RP91708. [PMID: 38466628 DOI: 10.7554/elife.91708] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024] Open
Abstract
Secretory proteins are sorted at the trans-Golgi network (TGN) for export into specific transport carriers. However, the molecular players involved in this fundamental process remain largely elusive. Here, we identified the human transmembrane protein TGN46 as a receptor for the export of secretory cargo protein PAUF in CARTS - a class of protein kinase D-dependent TGN-to-plasma membrane carriers. We show that TGN46 is necessary for cargo sorting and loading into nascent carriers at the TGN. By combining quantitative fluorescence microscopy and mutagenesis approaches, we further discovered that the lumenal domain of TGN46 encodes for its cargo sorting function. In summary, our results define a cellular function of TGN46 in sorting secretory proteins for export from the TGN.
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Affiliation(s)
- Pablo Lujan
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Carla Garcia-Cabau
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Yuichi Wakana
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Javier Vera Lillo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Carmen Rodilla-Ramírez
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Hideaki Sugiura
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Vivek Malhotra
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Xavier Salvatella
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Felix Campelo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
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2
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Font-Mateu J, Sanllehí P, Sot J, Abad B, Mateos N, Torreno-Pina JA, Ferrari R, Wright RHG, Garcia-Parajo MF, Joglar J, Goñi FM, Beato M. A progesterone derivative linked to a stable phospholipid activates breast cancer cell response without leaving the cell membrane. Cell Mol Life Sci 2024; 81:98. [PMID: 38386110 PMCID: PMC10884080 DOI: 10.1007/s00018-024-05116-3] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/30/2023] [Accepted: 01/05/2024] [Indexed: 02/23/2024]
Abstract
In hormone-responsive breast cancer cells, progesterone (P4) has been shown to act via its nuclear receptor (nPR), a ligand-activated transcription factor. A small fraction of progesterone receptor is palmitoylated and anchored to the cell membrane (mbPR) forming a complex with estrogen receptor alpha (ERα). Upon hormone exposure, either directly or via interaction with ERα, mbPR activates the SRC/RAS/ERK kinase pathway leading to phosphorylation of nPR by ERK. Kinase activation is essential for P4 gene regulation, as the ERK and MSK1 kinases are recruited by the nPR to its genomic binding sites and trigger chromatin remodeling. An interesting open question is whether activation of mbPR can result in gene regulation in the absence of ligand binding to intracellular progesterone receptor (iPR). This matter has been investigated in the past using P4 attached to serum albumin, but the attachment is leaky and albumin can be endocytosed and degraded, liberating P4. Here, we propose a more stringent approach to address this issue by ensuring attachment of P4 to the cell membrane via covalent binding to a stable phospholipid. This strategy identifies the actions of P4 independent from hormone binding to iPR. We found that a membrane-attached progestin can activate mbPR, the ERK signaling pathway leading to iPR phosphorylation, initial gene regulation and entry into the cell cycle, in the absence of detectable intracellular progestin.
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Affiliation(s)
- Jofre Font-Mateu
- Center for Genomic Regulation (CRG), Barcelona Institute for Science and Technology (BIST), Barcelona, Spain
| | - Pol Sanllehí
- Center for Genomic Regulation (CRG), Barcelona Institute for Science and Technology (BIST), Barcelona, Spain
- Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia, IQAC-CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Jesús Sot
- Instituto Biofisika (UPV/EHU, CSIC), Barrio Sarriena s/n, 48940, Leioa, Spain
| | - Beatriz Abad
- SGIKER, Universidad del País Vasco, Barrio Sarriena s/n, 48940, Leioa, Spain
| | - Nicolas Mateos
- The Barcelona Institute for Science and Technology (BIST), ICFO-Institut de Ciencies Fotòniques, 08860, Barcelona, Spain
| | - Juan Andres Torreno-Pina
- Center for Genomic Regulation (CRG), Barcelona Institute for Science and Technology (BIST), Barcelona, Spain
- The Barcelona Institute for Science and Technology (BIST), ICFO-Institut de Ciencies Fotòniques, 08860, Barcelona, Spain
| | - Roberto Ferrari
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Roni H G Wright
- Center for Genomic Regulation (CRG), Barcelona Institute for Science and Technology (BIST), Barcelona, Spain
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, 08195, Sant Cugat del Vallès, Barcelona, Spain
| | - Maria F Garcia-Parajo
- The Barcelona Institute for Science and Technology (BIST), ICFO-Institut de Ciencies Fotòniques, 08860, Barcelona, Spain
- ICREA, Pg. Lluis Companys 23, 08010, Barcelona, Spain
| | - Jesús Joglar
- Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia, IQAC-CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Félix M Goñi
- Instituto Biofisika (UPV/EHU, CSIC), Barrio Sarriena s/n, 48940, Leioa, Spain.
- Departamento de Bioquímica y Biología Molecular, Universidad del País Vasco, Barrio Sarriena s/n, 48940, Leioa, Spain.
| | - Miguel Beato
- Center for Genomic Regulation (CRG), Barcelona Institute for Science and Technology (BIST), Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), Barcelona, Spain.
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3
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Garcia-Parajo MF, Mayor S. The ubiquitous nanocluster: A molecular scale organizing principle that governs cellular information flow. Curr Opin Cell Biol 2024; 86:102285. [PMID: 38056142 DOI: 10.1016/j.ceb.2023.102285] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/25/2023] [Accepted: 11/02/2023] [Indexed: 12/08/2023]
Abstract
The language of biology at the scale of the cell is constituted of alphabets represented by biomolecules. These are stitched together in a variety of ways to create meaning. We argue that the phrases of this language are nanoscale molecular assemblies or nano-hubs for the purpose of information flow. At the cell surface information is sensed and processed via membrane receptors, often configured as multimers. These nano-assemblies serve as receiver nano-hubs, which are flexibly configured with additional nano-hubs that we term modifiers and transducers. This framework serves to process information that is transmitted for execution inside the cell. Here, we explore some examples about how nano-hubs are built and how they may contribute to cellular information flow.
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Affiliation(s)
- Maria F Garcia-Parajo
- ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain; ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain.
| | - Satyajit Mayor
- National Centre for Biological Sciences, 560065 Bangalore, India.
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4
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Herkert EK, Bermeo Alvaro DR, Recchia M, Langbein W, Borri P, Garcia-Parajo MF. Hybrid Plasmonic Nanostructures for Enhanced Single-Molecule Detection Sensitivity. ACS Nano 2023; 17:8453-8464. [PMID: 37011057 PMCID: PMC10173688 DOI: 10.1021/acsnano.3c00576] [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] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Biosensing applications based on fluorescence detection often require single-molecule sensitivity in the presence of strong background signals. Plasmonic nanoantennas are particularly suitable for these tasks, as they can confine and enhance light in volumes far below the diffraction limit. The recently introduced antenna-in-box (AiB) platforms achieved high single-molecule detection sensitivity at high fluorophore concentrations by placing gold nanoantennas in a gold aperture. However, hybrid AiB platforms with alternative aperture materials such as aluminum promise superior performance by providing better background screening. Here, we report on the fabrication and optical characterization of hybrid AiBs made of gold and aluminum for enhanced single-molecule detection sensitivity. We computationally optimize the optical properties of AiBs by controlling their geometry and materials and find that hybrid nanostructures not only improve signal-to-background ratios but also provide additional excitation intensity and fluorescence enhancements. We further establish a two-step electron beam lithography process to fabricate hybrid material AiB arrays with high reproducibility and experimentally validate the higher excitation and emission enhancements of the hybrid nanostructures as compared to their gold counterpart. We foresee that biosensors based on hybrid AiBs will provide improved sensitivity beyond the capabilities of current nanophotonic sensors for a plethora of biosensing applications ranging from multicolor fluorescence detection to label-free vibrational spectroscopy.
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Affiliation(s)
- Ediz Kaan Herkert
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - Domenica Romina Bermeo Alvaro
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - Martina Recchia
- School of Biosciences, Cardiff University, Museum Avenue, CF10 3AX Cardiff, United Kingdom
| | - Wolfgang Langbein
- School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom
| | - Paola Borri
- School of Biosciences, Cardiff University, Museum Avenue, CF10 3AX Cardiff, United Kingdom
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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5
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Sanz-Paz M, van Zanten TS, Manzo C, Mivelle M, Garcia-Parajo MF. Broadband Plasmonic Nanoantennas for Multi-Color Nanoscale Dynamics in Living Cells. Small 2023:e2207977. [PMID: 36999791 DOI: 10.1002/smll.202207977] [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] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/09/2023] [Indexed: 06/19/2023]
Abstract
Recently, the implementation of plasmonic nanoantennas has opened new possibilities to investigate the nanoscale dynamics of individual biomolecules in living cells. However, studies so far have been restricted to single molecular species as the narrow wavelength resonance of gold-based nanostructures precludes the simultaneous interrogation of different fluorescently labeled molecules. Here, broadband aluminum-based nanoantennas carved at the apex of near-field probes are exploited to resolve nanoscale-dynamic molecular interactions on living cell membranes. Through multicolor excitation, the authors simultaneously recorded fluorescence fluctuations of dual-color labeled transmembrane receptors known to form nanoclusters. Fluorescence cross-correlation studies revealed transient interactions between individual receptors in regions of ≈60 nm. Moreover, the high signal-to-background ratio provided by the antenna illumination allowed the authors to directly detect fluorescent bursts arising from the passage of individual receptors underneath the antenna. Remarkably, by reducing the illumination volume below the characteristic receptor nanocluster sizes, the molecular diffusion within nanoclusters is resolved and distinguished from nanocluster diffusion. Spatiotemporal characterization of transient interactions between molecules is crucial to understand how they communicate with each other to regulate cell function. This work demonstrates the potential of broadband photonic antennas to study multi-molecular events and interactions in living cell membranes with unprecedented spatiotemporal resolution.
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Affiliation(s)
- Maria Sanz-Paz
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute for Science and Technology, Barcelona, 08860, Spain
- Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg, CH-1700, Switzerland
| | - Thomas S van Zanten
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute for Science and Technology, Barcelona, 08860, Spain
- National Centre for Biological Sciences, Bangalore, 560065, India
| | - Carlo Manzo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute for Science and Technology, Barcelona, 08860, Spain
- Facultat de Ciéncies, Tecnologia i Enginyeries, Universitat de Vic - Universitat Central de Catalunya, C. de la Laura 13, Vic, 08500, Spain
| | - Mathieu Mivelle
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, UMR 7588, Paris, 75005, France
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute for Science and Technology, Barcelona, 08860, Spain
- ICREA, Pg. Lluis Companys 23, Barcelona, 08010, Spain
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6
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Gutiérrez-Martínez E, Benet Garrab S, Mateos N, Erkiziac I, Nieto-Garai JA, Lorizate M, Borgman KJE, Manzo C, Campelo F, Izquierdo-Useros N, Martinez-Picado J, Garcia-Parajo MF. Actin-regulated Siglec-1 nanoclustering influences HIV-1 capture and virus-containing compartment formation in dendritic cells. eLife 2023; 12:78836. [PMID: 36940134 PMCID: PMC10065798 DOI: 10.7554/elife.78836] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 03/22/2022] [Accepted: 03/19/2023] [Indexed: 03/21/2023] Open
Abstract
The immunoglobulin-like lectin receptor CD169 (Siglec-1) mediates the capture of HIV-1 by activated dendritic cells (DC) through binding to sialylated ligands. These interactions result in a more efficient virus capture as compared to resting DCs, although the underlying mechanisms are poorly understood. Using a combination of super-resolution microscopy, single particle tracking and biochemical perturbations we studied the nanoscale organization of Siglec-1 on activated DCs and its impact on viral capture and its trafficking to a single viral-containing compartment. We found that activation of DCs leads to Siglec-1 basal nanoclustering at specific plasma membrane regions where receptor diffusion is constrained by Rho-ROCK activation and formin-dependent actin polymerization. Using liposomes with varying ganglioside concentrations, we further demonstrate that Siglec-1 nanoclustering enhances the receptor avidity to limiting concentrations of gangliosides carrying sialic ligands. Binding to either HIV-1 particles or ganglioside-bearing liposomes lead to enhanced Siglec-1 nanoclustering and global actin rearrangements characterized by a drop in RhoA activity, facilitating the final accumulation of viral particles in a single sac-like compartment. Overall, our work provides new insights on the role of the actin machinery of activated DCs in regulating the formation of basal Siglec-1 nanoclustering, being decisive for the capture and actin-dependent trafficking of HIV-1 into the virus-containing compartment.
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Affiliation(s)
- Enric Gutiérrez-Martínez
- Institute of Photonic Sciences, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Susana Benet Garrab
- Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | - Nicolas Mateos
- Institute of Photonic Sciences, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | | | | | | | - Kyra J E Borgman
- Institute of Photonic Sciences, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Carlo Manzo
- Facultat de Ciències i Tecnologia, Universitat Central de Catalunya, Vic, Spain
| | - Felix Campelo
- Institute of Photonic Sciences, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | | | | | - Maria F Garcia-Parajo
- Institute of Photonic Sciences, The Barcelona Institute of Science and Technology, Barcelona, Spain
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7
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Garcia-Parajo MF. Dynamic mapping of individual molecules and their compartments by high-density single particle tracking. Biophys J 2023; 122:1a. [PMID: 36782964 DOI: 10.1016/j.bpj.2022.11.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
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8
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Wakana Y, Hayashi K, Nemoto T, Watanabe C, Taoka M, Angulo-Capel J, Garcia-Parajo MF, Kumata H, Umemura T, Inoue H, Arasaki K, Campelo F, Tagaya M. The ER cholesterol sensor SCAP promotes CARTS biogenesis at ER-Golgi membrane contact sites. J Cell Biol 2021; 220:211521. [PMID: 33156328 PMCID: PMC7654440 DOI: 10.1083/jcb.202002150] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 02/26/2020] [Revised: 09/15/2020] [Accepted: 10/12/2020] [Indexed: 12/13/2022] Open
Abstract
In response to cholesterol deprivation, SCAP escorts SREBP transcription factors from the endoplasmic reticulum to the Golgi complex for their proteolytic activation, leading to gene expression for cholesterol synthesis and uptake. Here, we show that in cholesterol-fed cells, ER-localized SCAP interacts through Sac1 phosphatidylinositol 4-phosphate (PI4P) phosphatase with a VAP-OSBP complex, which mediates counter-transport of ER cholesterol and Golgi PI4P at ER-Golgi membrane contact sites (MCSs). SCAP knockdown inhibited the turnover of PI4P, perhaps due to a cholesterol transport defect, and altered the subcellular distribution of the VAP-OSBP complex. As in the case of perturbation of lipid transfer complexes at ER-Golgi MCSs, SCAP knockdown inhibited the biogenesis of the trans-Golgi network-derived transport carriers CARTS, which was reversed by expression of wild-type SCAP or a Golgi transport-defective mutant, but not of cholesterol sensing-defective mutants. Altogether, our findings reveal a new role for SCAP under cholesterol-fed conditions in the facilitation of CARTS biogenesis via ER-Golgi MCSs, depending on the ER cholesterol.
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Affiliation(s)
- Yuichi Wakana
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Kaito Hayashi
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Takumi Nemoto
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Chiaki Watanabe
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Masato Taoka
- Faculty of Science, Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Jessica Angulo-Capel
- Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Maria F Garcia-Parajo
- Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Hidetoshi Kumata
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Tomonari Umemura
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Hiroki Inoue
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Kohei Arasaki
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
| | - Felix Campelo
- Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Mitsuo Tagaya
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan
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9
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Winkler P, Campelo F, Giannotti MI, Garcia-Parajo MF. Impact of Glycans on Lipid Membrane Dynamics at the Nanoscale Unveiled by Planar Plasmonic Nanogap Antennas and Atomic Force Spectroscopy. J Phys Chem Lett 2021; 12:1175-1181. [PMID: 33480693 PMCID: PMC7869103 DOI: 10.1021/acs.jpclett.0c03439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/19/2021] [Indexed: 05/27/2023]
Abstract
Lateral compartmentalization of the plasma membrane is a prominent feature present at multiple spatiotemporal scales that regulates key cellular functions. The extracellular glycocalyx matrix has recently emerged as an important player that modulates the organization of specific receptors and patterns the lipid bilayer itself. However, experimental limitations in investigating its impact on the membrane nanoscale dynamics have hampered detailed studies. Here, we used photonic nanoantenna arrays combined with fluorescence correlation spectroscopy to investigate the influence of hyaluronic acid (HA), a prominent glycosaminoglycan, on the nanoscale organization of mimetic lipid bilayers. Using atomic force microscopy and force spectroscopy, we further correlated our dynamic measurements with the morphology and mechanical properties of bilayers at the nanoscale. Overall, we find that HA has a profound effect on the dynamics, nanoscale organization, and mechanical properties of lipid bilayers that are enriched in sphingolipids and/or cholesterol, such as those present in living cells.
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Affiliation(s)
- Pamina
M. Winkler
- ICFO-Institut
de Ciencies Fotoniques, The Barcelona Institute
of Science and Technology, 08860 Barcelona, Spain
| | - Felix Campelo
- ICFO-Institut
de Ciencies Fotoniques, The Barcelona Institute
of Science and Technology, 08860 Barcelona, Spain
| | - Marina I. Giannotti
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine
(CIBER-BBN), 28029 Madrid, Spain
- Institut
de Bioenginyeria de Catalunya (IBEC), The
Barcelona Institute of Science
and Technology, 08860 Barcelona, Spain
- Universitat
de Barcelona (UB), 08007 Barcelona, Spain
| | - Maria F. Garcia-Parajo
- ICFO-Institut
de Ciencies Fotoniques, The Barcelona Institute
of Science and Technology, 08860 Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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10
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Raote I, Chabanon M, Walani N, Arroyo M, Garcia-Parajo MF, Malhotra V, Campelo F. A physical mechanism of TANGO1-mediated bulky cargo export. eLife 2020; 9:e59426. [PMID: 33169667 PMCID: PMC7704110 DOI: 10.7554/elife.59426] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 11/09/2020] [Indexed: 01/08/2023] Open
Abstract
The endoplasmic reticulum (ER)-resident protein TANGO1 assembles into a ring around ER exit sites (ERES), and links procollagens in the ER lumen to COPII machinery, tethers, and ER-Golgi intermediate compartment (ERGIC) in the cytoplasm (Raote et al., 2018). Here, we present a theoretical approach to investigate the physical mechanisms of TANGO1 ring assembly and how COPII polymerization, membrane tension, and force facilitate the formation of a transport intermediate for procollagen export. Our results indicate that a TANGO1 ring, by acting as a linactant, stabilizes the open neck of a nascent COPII bud. Elongation of such a bud into a transport intermediate commensurate with bulky procollagens is then facilitated by two complementary mechanisms: (i) by relieving membrane tension, possibly by TANGO1-mediated fusion of retrograde ERGIC membranes and (ii) by force application. Altogether, our theoretical approach identifies key biophysical events in TANGO1-driven procollagen export.
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Affiliation(s)
- Ishier Raote
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and TechnologyBarcelonaSpain
| | - Morgan Chabanon
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and TechnologyBarcelonaSpain
- Universitat Politècnica de Catalunya-BarcelonaTechBarcelonaSpain
| | - Nikhil Walani
- Universitat Politècnica de Catalunya-BarcelonaTechBarcelonaSpain
| | - Marino Arroyo
- Universitat Politècnica de Catalunya-BarcelonaTechBarcelonaSpain
- Institute for Bioengineering of Catalonia, The Barcelona Institute of Science and TechnologyBarcelonaSpain
- Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE)BarcelonaSpain
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and TechnologyBarcelonaSpain
- ICREABarcelonaSpain
| | - Vivek Malhotra
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and TechnologyBarcelonaSpain
- ICREABarcelonaSpain
- Universitat Pompeu Fabra (UPF)BarcelonaSpain
| | - Felix Campelo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and TechnologyBarcelonaSpain
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11
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Sil P, Mateos N, Nath S, Buschow S, Manzo C, Suzuki KGN, Fujiwara T, Kusumi A, Garcia-Parajo MF, Mayor S. Dynamic actin-mediated nano-scale clustering of CD44 regulates its meso-scale organization at the plasma membrane. Mol Biol Cell 2019; 31:561-579. [PMID: 31577524 PMCID: PMC7202065 DOI: 10.1091/mbc.e18-11-0715] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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] [Indexed: 01/08/2023] Open
Abstract
Transmembrane adhesion receptors at the cell surface, such as CD44, are often equipped with modules to interact with the extracellular matrix (ECM) and the intracellular cytoskeletal machinery. CD44 has been recently shown to compartmentalize the membrane into domains by acting as membrane pickets, facilitating the function of signaling receptors. While spatial organization and diffusion studies of membrane proteins are usually conducted separately, here we combine observations of organization and diffusion by using high spatio-temporal resolution imaging on living cells to reveal a hierarchical organization of CD44. CD44 is present in a meso-scale meshwork pattern where it exhibits enhanced confinement and is enriched in nanoclusters of CD44 along its boundaries. This nanoclustering is orchestrated by the underlying cortical actin dynamics. Interaction with actin is mediated by specific segments of the intracellular domain. This influences the organization of the protein at the nano-scale, generating a selective requirement for formin over Arp2/3-based actin-nucleation machinery. The extracellular domain and its interaction with elements of ECM do not influence the meso-scale organization, but may serve to reposition the meshwork with respect to the ECM. Taken together, our results capture the hierarchical nature of CD44 organization at the cell surface, with active cytoskeleton-templated nanoclusters localized to a meso-scale meshwork pattern.
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Affiliation(s)
- Parijat Sil
- National Centre for Biological Sciences (NCBS)
| | - Nicolas Mateos
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona 08860, Spain
| | - Sangeeta Nath
- Institute of Stem Cell and Regenerative Medicine.,Manipal Institute of Regenerative Medicine, Manipal Academy of Higher Education, Bangalore 560065, India
| | - Sonja Buschow
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, Rotterdam 3015 GD Rotterdam, The Netherlands
| | - Carlo Manzo
- Facultat de Ciències i Tecnologia, Universitat de Vic-Universitat Central de Catalunya, Vic 08500, Spain
| | - Kenichi G N Suzuki
- Centre for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu 501-1193, Japan.,Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Takahiro Fujiwara
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Akihiro Kusumi
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan.,Okinawa Institute of Science and Technology, Graduate University, Okinawa 904-0412, Japan
| | - Maria F Garcia-Parajo
- Institute of Stem Cell and Regenerative Medicine.,Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - Satyajit Mayor
- National Centre for Biological Sciences (NCBS).,Institute of Stem Cell and Regenerative Medicine
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12
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Sosa-Costa A, Piechocka IK, Gardini L, Pavone FS, Capitanio M, Garcia-Parajo MF, Manzo C. PLANT: A Method for Detecting Changes of Slope in Noisy Trajectories. Biophys J 2019; 114:2044-2051. [PMID: 29742398 DOI: 10.1016/j.bpj.2018.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 03/17/2018] [Accepted: 04/02/2018] [Indexed: 01/13/2023] Open
Abstract
Time traces obtained from a variety of biophysical experiments contain valuable information on underlying processes occurring at the molecular level. Accurate quantification of these data can help explain the details of the complex dynamics of biological systems. Here, we describe PLANT (Piecewise Linear Approximation of Noisy Trajectories), a segmentation algorithm that allows the reconstruction of time-trace data with constant noise as consecutive straight lines, from which changes of slopes and their respective durations can be extracted. We present a general description of the algorithm and perform extensive simulations to characterize its strengths and limitations, providing a rationale for the performance of the algorithm in the different conditions tested. We further apply the algorithm to experimental data obtained from tracking the centroid position of lymphocytes migrating under the effect of a laminar flow and from single myosin molecules interacting with actin in a dual-trap force-clamp configuration.
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Affiliation(s)
- Alberto Sosa-Costa
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Izabela K Piechocka
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Lucia Gardini
- LENS - European Laboratory for Non-linear Spectroscopy, Sesto Fiorentino, Italy; National Institute of Optics-National Research Council, Florence, Italy
| | - Francesco S Pavone
- LENS - European Laboratory for Non-linear Spectroscopy, Sesto Fiorentino, Italy; National Institute of Optics-National Research Council, Florence, Italy; Department of Physics and Astronomy, University of Florence, Sesto Fiorentino, Italy
| | - Marco Capitanio
- LENS - European Laboratory for Non-linear Spectroscopy, Sesto Fiorentino, Italy; Department of Physics and Astronomy, University of Florence, Sesto Fiorentino, Italy
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain; ICREA, Barcelona, Spain
| | - Carlo Manzo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain; Universitat de Vic - Universitat Central de Catalunya, Vic, Spain.
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13
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Balcerek M, Loch-Olszewska H, Torreno-Pina JA, Garcia-Parajo MF, Weron A, Manzo C, Burnecki K. Inhomogeneous membrane receptor diffusion explained by a fractional heteroscedastic time series model. Phys Chem Chem Phys 2019; 21:3114-3121. [DOI: 10.1039/c8cp06781c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fractional heteroscedastic time series model explains inhomogeneous membrane receptor diffusion and interprets ergodicity when the diffusion parameter fluctuates in time.
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Affiliation(s)
- Michał Balcerek
- Faculty of Pure and Applied Mathematics, Hugo Steinhaus Center, Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
| | - Hanna Loch-Olszewska
- Faculty of Pure and Applied Mathematics, Hugo Steinhaus Center, Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
| | - Juan A. Torreno-Pina
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology
- 08860 Castelldefels (Barcelona)
- Spain
| | - Maria F. Garcia-Parajo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology
- 08860 Castelldefels (Barcelona)
- Spain
- ICREA
- 08010 Barcelona
| | - Aleksander Weron
- Faculty of Pure and Applied Mathematics, Hugo Steinhaus Center, Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
| | - Carlo Manzo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology
- 08860 Castelldefels (Barcelona)
- Spain
- Facultat de Ciències i Tecnologia, Universitat de Vic – Universitat Central de Catalunya
- 08550 Vic
| | - Krzysztof Burnecki
- Faculty of Pure and Applied Mathematics, Hugo Steinhaus Center, Wrocław University of Science and Technology
- 50-370 Wrocław
- Poland
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14
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Garbacik ET, Sanz-Paz M, Borgman KJE, Campelo F, Garcia-Parajo MF. Frequency-Encoded Multicolor Fluorescence Imaging with Single-Photon-Counting Color-Blind Detection. Biophys J 2018; 115:725-736. [PMID: 30037496 PMCID: PMC6104530 DOI: 10.1016/j.bpj.2018.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 06/25/2018] [Accepted: 07/09/2018] [Indexed: 02/06/2023] Open
Abstract
Standard fluorescence microscopy relies on filter-based detection of emitted photons after fluorophore excitation at the appropriate wavelength. Although of enormous utility to the biological community, the implementation of approaches for simultaneous multicolor fluorescence imaging is commonly challenged by the large spectral overlap between different fluorophores. Here, we describe an alternative multicolor fluorescence imaging methodology that exclusively relies on the absorption spectra of the fluorophores instead of their fluorescence emissions. The method is based on multiplexing optical excitation signals in the frequency domain and using single color-blind detection. Because the spectral information is fully encoded during excitation, the method requires minimal spectral filtering on detection. This enables the simultaneous identification of multiple color channels in a single measurement with only one color-blind detector. We demonstrate simultaneous three-color confocal imaging of individual molecules and of four-target imaging on cells with excellent discrimination. Moreover, we have implemented a non-negative matrix factorization algorithm for spectral unmixing to extend the number of color targets that can be discriminated in a single measurement. Using this algorithm, we resolve six spectrally and spatially overlapping fluorophores on fixed cells using four excitation wavelengths. The methodology is fully compatible with live imaging of biological samples and can be easily extended to other imaging modalities, including super-resolution microscopy, making simultaneous multicolor imaging more accessible to the biological research community.
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Affiliation(s)
- Erik T Garbacik
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Maria Sanz-Paz
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Kyra J E Borgman
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Felix Campelo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona, Spain; ICREA, Barcelona, Spain.
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15
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Porto V, Borrajo E, Buceta D, Carneiro C, Huseyinova S, Domínguez B, Borgman KJE, Lakadamyali M, Garcia-Parajo MF, Neissa J, García-Caballero T, Barone G, Blanco MC, Busto N, García B, Leal JM, Blanco J, Rivas J, López-Quintela MA, Domínguez F. Silver Atomic Quantum Clusters of Three Atoms for Cancer Therapy: Targeting Chromatin Compaction to Increase the Therapeutic Index of Chemotherapy. Adv Mater 2018; 30:e1801317. [PMID: 29974518 DOI: 10.1002/adma.201801317] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/28/2018] [Indexed: 05/05/2023]
Abstract
Nanomaterials with very low atomicity deserve consideration as potential pharmacological agents owing to their very small size and to their properties that can be precisely tuned with minor modifications to their size. Here, it is shown that silver clusters of three atoms (Ag3 -AQCs)-developed by an ad hoc method-augment chromatin accessibility. This effect only occurs during DNA replication. Coadministration of Ag3 -AQCs increases the cytotoxic effect of DNA-acting drugs on human lung carcinoma cells. In mice with orthotopic lung tumors, the coadministration of Ag3 -AQCs increases the amount of cisplatin (CDDP) bound to the tumor DNA by fivefold without modifying CDDP levels in normal tissues. As a result, CDDP coadministered with Ag3 -AQCs more strongly reduces the tumor burden. Evidence of the significance of targeting chromatin compaction to increase the therapeutic index of chemotherapy is now provided.
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Affiliation(s)
- Vanesa Porto
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Erea Borrajo
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - David Buceta
- Departments of Physical Chemistry and Applied Physics, Nanomag Laboratory, IIT, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Carmen Carneiro
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Shahana Huseyinova
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Blanca Domínguez
- Departments of Physical Chemistry and Applied Physics, Nanomag Laboratory, IIT, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Kyra J E Borgman
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860, Castelldefels (Barcelona), Spain
| | - Melike Lakadamyali
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860, Castelldefels (Barcelona), Spain
- ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - José Neissa
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Tomás García-Caballero
- Department of Morphological Sciences, School of Medicine-University Clinical Hospital, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Giampaolo Barone
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, 90128, Palermo, Italy
| | - M Carmen Blanco
- Departments of Physical Chemistry and Applied Physics, Nanomag Laboratory, IIT, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Natalia Busto
- Department of Chemistry, University of Burgos, 9001, Burgos, Spain
| | - Begoña García
- Department of Chemistry, University of Burgos, 9001, Burgos, Spain
| | - José Maria Leal
- Department of Chemistry, University of Burgos, 9001, Burgos, Spain
| | - José Blanco
- International Iberian Nanotechnology Laboratory (INL), 4715, Braga, Portugal
| | - José Rivas
- Departments of Physical Chemistry and Applied Physics, Nanomag Laboratory, IIT, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
- International Iberian Nanotechnology Laboratory (INL), 4715, Braga, Portugal
| | - M Arturo López-Quintela
- Departments of Physical Chemistry and Applied Physics, Nanomag Laboratory, IIT, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Fernando Domínguez
- Department of Physiology and Centro de Investigaciones en Medicina Molecular y Enfermedades Crónicas (CIMUS), IDIS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
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16
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Sanz-Paz M, Ernandes C, Esparza JU, Burr GW, van Hulst NF, Maitre A, Aigouy L, Gacoin T, Bonod N, Garcia-Parajo MF, Bidault S, Mivelle M. Enhancing Magnetic Light Emission with All-Dielectric Optical Nanoantennas. Nano Lett 2018; 18:3481-3487. [PMID: 29701991 DOI: 10.1021/acs.nanolett.8b00548] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electric and magnetic optical fields carry the same amount of energy. Nevertheless, the efficiency with which matter interacts with electric optical fields is commonly accepted to be at least 4 orders of magnitude higher than with magnetic optical fields. Here, we experimentally demonstrate that properly designed photonic nanoantennas can selectively manipulate the magnetic versus electric emission of luminescent nanocrystals. In particular, we show selective enhancement of magnetic emission from trivalent europium-doped nanoparticles in the vicinity of a nanoantenna tailored to exhibit a magnetic resonance. Specifically, by controlling the spatial coupling between emitters and an individual nanoresonator located at the edge of a near-field optical scanning tip, we record with nanoscale precision local distributions of both magnetic and electric radiative local densities of states (LDOS). The map of the radiative LDOS reveals the modification of both the magnetic and electric quantum environments induced by the presence of the nanoantenna. This manipulation and enhancement of magnetic light-matter interaction by means of nanoantennas opens up new possibilities for the research fields of optoelectronics, chiral optics, nonlinear and nano-optics, spintronics, and metamaterials, among others.
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Affiliation(s)
- Maria Sanz-Paz
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels , 08860 Barcelona , Spain
| | - Cyrine Ernandes
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, UMR 7588 , 75005 Paris , France
- Laboratoire de Physique et d'Etude des Matériaux , ESPCI Paristech, CNRS , 75005 Paris , France
| | - Juan Uriel Esparza
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, UMR 7588 , 75005 Paris , France
| | - Geoffrey W Burr
- IBM Almaden Research Center , San Jose , California 95120 , United States
| | - Niek F van Hulst
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels , 08860 Barcelona , Spain
- ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain
| | - Agnès Maitre
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, UMR 7588 , 75005 Paris , France
| | - Lionel Aigouy
- Laboratoire de Physique et d'Etude des Matériaux , ESPCI Paristech, CNRS , 75005 Paris , France
| | - Thierry Gacoin
- Laboratoire de Physique de la Matière Condensée , Ecole Polytechnique , Route de Saclay , 91128 Palaiseau , France
| | - Nicolas Bonod
- Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel , Marseille , France
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels , 08860 Barcelona , Spain
- ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain
| | - Sébastien Bidault
- ESPCI Paris, PSL Research University, CNRS, Institut Langevin , 75005 Paris , France
| | - Mathieu Mivelle
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology , Castelldefels , 08860 Barcelona , Spain
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, UMR 7588 , 75005 Paris , France
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17
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Raote I, Ortega-Bellido M, Santos AJ, Foresti O, Zhang C, Garcia-Parajo MF, Campelo F, Malhotra V. TANGO1 builds a machine for collagen export by recruiting and spatially organizing COPII, tethers and membranes. eLife 2018. [PMID: 29513218 PMCID: PMC5851698 DOI: 10.7554/elife.32723] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Collagen export from the endoplasmic reticulum (ER) requires TANGO1, COPII coats, and retrograde fusion of ERGIC membranes. How do these components come together to produce a transport carrier commensurate with the bulky cargo collagen? TANGO1 is known to form a ring that corrals COPII coats, and we show here how this ring or fence is assembled. Our data reveal that a TANGO1 ring is organized by its radial interaction with COPII, and lateral interactions with cTAGE5, TANGO1-short or itself. Of particular interest is the finding that TANGO1 recruits ERGIC membranes for collagen export via the NRZ (NBAS/RINT1/ZW10) tether complex. Therefore, TANGO1 couples retrograde membrane flow to anterograde cargo transport. Without the NRZ complex, the TANGO1 ring does not assemble, suggesting its role in nucleating or stabilising this process. Thus, coordinated capture of COPII coats, cTAGE5, TANGO1-short, and tethers by TANGO1 assembles a collagen export machine at the ER.
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Affiliation(s)
- Ishier Raote
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | - Maria Ortega-Bellido
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | - António Jm Santos
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | - Ombretta Foresti
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | - Chong Zhang
- SIMBIOsys Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Felix Campelo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain
| | - Vivek Malhotra
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
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18
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Muñoz-Gil G, Charalambous C, García-March MA, Garcia-Parajo MF, Manzo C, Lewenstein M, Celi A. Transient subdiffusion from an Ising environment. Phys Rev E 2018; 96:052140. [PMID: 29347809 DOI: 10.1103/physreve.96.052140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 11/07/2022]
Abstract
We introduce a model in which a particle performs a continuous-time random walk (CTRW) coupled to an environment with Ising dynamics. The particle shows locally varying diffusivity determined by the geometrical properties of the underlying Ising environment, that is, the diffusivity depends on the size of the connected area of spins pointing in the same direction. The model shows anomalous diffusion when the Ising environment is at critical temperature. We show that any finite scale introduced by a temperature different from the critical one, or a finite size of the environment, cause subdiffusion only during a transient time. The characteristic time, at which the system returns to normal diffusion after the subdiffusive plateau depends on the limiting scale and on how close the temperature is to criticality. The system also displays apparent ergodicity breaking at intermediate time, while ergodicity breaking at longer time occurs only under the idealized infinite environment at the critical temperature.
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Affiliation(s)
- G Muñoz-Gil
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - C Charalambous
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - M A García-March
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - M F Garcia-Parajo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.,ICREA-Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - C Manzo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.,Universitat de Vic-Universitat Central de Catalunya (UVic-UCC), C. de la Laura, 13, 08500 Vic, Spain
| | - M Lewenstein
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.,ICREA-Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - A Celi
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
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19
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Abstract
Single-molecule-based super-resolution microscopy offers a unique opportunity for quantifying protein copy-number with nanoscale resolution. However, while fluorescent proteins have been characterized for quantitative imaging using calibration standards, similar calibration tools for immunofluorescence with small organic fluorophores are lacking. Here, we show that DNA origami in combination with GFP antibodies is a versatile platform for calibrating fluorophore and antibody labeling efficiency to quantify protein copy-number in cellular contexts using super-resolution microscopy.
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Affiliation(s)
- Francesca Cella Zanacchi
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain
| | - Carlo Manzo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain.,Universitat de Vic - Universitat Central de Catalunya (UVic-UCC), Vic, Spain
| | - Angel S Alvarez
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain
| | - Nathan D Derr
- Department of Biological Sciences, Smith College, Northampton, Massachusetts, USA.,Center for Microscopy and Imaging, Smith College, Northampton, Massachusetts, USA
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain.,ICREA, Barcelona, Spain
| | - Melike Lakadamyali
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Spain
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20
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Charalambous C, Muñoz-Gil G, Celi A, Garcia-Parajo MF, Lewenstein M, Manzo C, García-March MA. Nonergodic subdiffusion from transient interactions with heterogeneous partners. Phys Rev E 2017; 95:032403. [PMID: 28415278 DOI: 10.1103/physreve.95.032403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Indexed: 06/07/2023]
Abstract
Spatiotemporal disorder has been recently associated to the occurrence of anomalous nonergodic diffusion of molecular components in biological systems, but the underlying microscopic mechanism is still unclear. We introduce a model in which a particle performs continuous Brownian motion with changes of diffusion coefficients induced by transient molecular interactions with diffusive binding partners. In spite of the exponential distribution of waiting times, the model shows subdiffusion and nonergodicity similar to the heavy-tailed continuous time random walk. The dependence of these properties on the density of binding partners is analyzed and discussed. Our work provides an experimentally testable microscopic model to investigate the nature of nonergodicity in disordered media.
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Affiliation(s)
- C Charalambous
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - G Muñoz-Gil
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - A Celi
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
| | - M F Garcia-Parajo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
- ICREA - Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - M Lewenstein
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
- ICREA - Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - C Manzo
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
- Universitat de Vic - Universitat Central de Catalunya (UVic-UCC), C. de la Laura, 13, 08500 Vic, Spain
| | - M A García-March
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
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21
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Sosa-Costa A, Isern de Val S, Sevilla-Movilla S, Borgman KJE, Manzo C, Teixidó J, Garcia-Parajo MF. Lateral Mobility and Nanoscale Spatial Arrangement of Chemokine-activated α4β1 Integrins on T Cells. J Biol Chem 2016; 291:21053-21062. [PMID: 27481944 PMCID: PMC5076515 DOI: 10.1074/jbc.m116.733709] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Indexed: 01/13/2023] Open
Abstract
Chemokine stimulation of integrin α4β1-dependent T lymphocyte adhesion is a key step during lymphocyte trafficking. A central question regarding α4β1 function is how its lateral mobility and organization influence its affinity and avidity following cell stimulation with chemokines and/or ligands. Using single particle tracking and superresolution imaging approaches, we explored the lateral mobility and spatial arrangement of individual α4β1integrins on T cells exposed to different activating stimuli. We show that CXCL12 stimulation leads to rapid and transient α4β1activation, measured by induction of the activation epitope recognized by the HUTS-21 anti-β1antibody and by increased talin-β1 association. CXCL12-dependent α4β1 activation directly correlated with restricted lateral diffusion and integrin immobilization. Moreover, co-stimulation by CXCL12 together with soluble VCAM-1 potentiated integrin immobilization with a 5-fold increase in immobile integrins compared with unstimulated conditions. Our data indicate that docking by talin of the chemokine-activated α4β1 to the actin cytoskeleton favors integrin immobilization, which likely facilitates ligand interaction and increased adhesiveness. Superresolution imaging showed that the nanoscale organization of high-affinity α4β1 remains unaffected following chemokine and/or ligand addition. Instead, newly activated α4β1 integrins organize on the cell membrane as independent units without joining pre-established integrin sites to contribute to cluster formation. Altogether, our results provide a rationale to understand how the spatiotemporal organization of activated α4β1 integrins regulates T lymphocyte adhesion.
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Affiliation(s)
- Alberto Sosa-Costa
- From the Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Sol Isern de Val
- the Centro de Investigaciones Biológicas, Department of Cellular and Molecular Medicine, 28040 Madrid, Spain, and
| | - Silvia Sevilla-Movilla
- the Centro de Investigaciones Biológicas, Department of Cellular and Molecular Medicine, 28040 Madrid, Spain, and
| | - Kyra J E Borgman
- From the Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Carlo Manzo
- From the Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Joaquin Teixidó
- the Centro de Investigaciones Biológicas, Department of Cellular and Molecular Medicine, 28040 Madrid, Spain, and
| | - Maria F Garcia-Parajo
- From the Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain, the ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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22
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Torreno-Pina JA, Manzo C, Salio M, Aichinger MC, Oddone A, Lakadamyali M, Shepherd D, Besra GS, Cerundolo V, Garcia-Parajo MF. The actin cytoskeleton modulates the activation of iNKT cells by segregating CD1d nanoclusters on antigen-presenting cells. Proc Natl Acad Sci U S A 2016; 113:E772-81. [PMID: 26798067 PMCID: PMC4760795 DOI: 10.1073/pnas.1514530113] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Invariant natural killer T (iNKT) cells recognize endogenous and exogenous lipid antigens presented in the context of CD1d molecules. The ability of iNKT cells to recognize endogenous antigens represents a distinct immune recognition strategy, which underscores the constitutive memory phenotype of iNKT cells and their activation during inflammatory conditions. However, the mechanisms regulating such "tonic" activation of iNKT cells remain unclear. Here, we show that the spatiotemporal distribution of CD1d molecules on the surface of antigen-presenting cells (APCs) modulates activation of iNKT cells. By using superresolution microscopy, we show that CD1d molecules form nanoclusters at the cell surface of APCs, and their size and density are constrained by the actin cytoskeleton. Dual-color single-particle tracking revealed that diffusing CD1d nanoclusters are actively arrested by the actin cytoskeleton, preventing their further coalescence. Formation of larger nanoclusters occurs in the absence of interactions between CD1d cytosolic tail and the actin cytoskeleton and correlates with enhanced iNKT cell activation. Importantly and consistently with iNKT cell activation during inflammatory conditions, exposure of APCs to the Toll-like receptor 7/8 agonist R848 increases nanocluster density and iNKT cell activation. Overall, these results define a previously unidentified mechanism that modulates iNKT cell autoreactivity based on the tight control by the APC cytoskeleton of the sizes and densities of endogenous antigen-loaded CD1d nanoclusters.
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Affiliation(s)
- Juan A Torreno-Pina
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain
| | - Carlo Manzo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain
| | - Mariolina Salio
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Michael C Aichinger
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Anna Oddone
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain
| | - Melike Lakadamyali
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain
| | - Dawn Shepherd
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Gurdyal S Besra
- School of Biosciences, University of Birmingham, Birmingham B11 2TT, United Kingdom
| | - Vincenzo Cerundolo
- Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom;
| | - Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
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23
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Abstract
Optical microscopy has for centuries been a key tool to study living cells with minimum invasiveness. The advent of single molecule techniques over the past two decades has revolutionized the field of cell biology by providing a more quantitative picture of the complex and highly dynamic organization of living systems. Amongst these techniques, single particle tracking (SPT) has emerged as a powerful approach to study a variety of dynamic processes in life sciences. SPT provides access to single molecule behavior in the natural context of living cells, thereby allowing a complete statistical characterization of the system under study. In this review we describe the foundations of SPT together with novel optical implementations that nowadays allow the investigation of single molecule dynamic events with increasingly high spatiotemporal resolution using molecular densities closer to physiological expression levels. We outline some of the algorithms for the faithful reconstruction of SPT trajectories as well as data analysis, and highlight biological examples where the technique has provided novel insights into the role of diffusion regulating cellular function. The last part of the review concentrates on different theoretical models that describe anomalous transport behavior and ergodicity breaking observed from SPT studies in living cells.
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Affiliation(s)
- Carlo Manzo
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
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24
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Garcia-Parajo MF, Cambi A, Torreno-Pina JA, Thompson N, Jacobson K. Nanoclustering as a dominant feature of plasma membrane organization. J Cell Sci 2015; 127:4995-5005. [PMID: 25453114 DOI: 10.1242/jcs.146340] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Early studies have revealed that some mammalian plasma membrane proteins exist in small nanoclusters. The advent of super-resolution microscopy has corroborated and extended this picture, and led to the suggestion that many, if not most, membrane proteins are clustered at the plasma membrane at nanoscale lengths. In this Commentary, we present selected examples of glycosylphosphatidyl-anchored proteins, Ras family members and several immune receptors that provide evidence for nanoclustering. We advocate the view that nanoclustering is an important part of the hierarchical organization of proteins in the plasma membrane. According to this emerging picture, nanoclusters can be organized on the mesoscale to form microdomains that are capable of supporting cell adhesion, pathogen binding and immune cell-cell recognition amongst other functions. Yet, a number of outstanding issues concerning nanoclusters remain open, including the details of their molecular composition, biogenesis, size, stability, function and regulation. Notions about these details are put forth and suggestions are made about nanocluster function and why this general feature of protein nanoclustering appears to be so prevalent.
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Affiliation(s)
- Maria F Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
| | - Alessandra Cambi
- Nanobiophysics, MIRA Institute for Biomedical Technology and Technical Medicine and MESA+ Institute for Nanotechnology, University of Twente, 7522 NB Enschede, The Netherlands Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
| | - Juan A Torreno-Pina
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
| | - Nancy Thompson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA
| | - Ken Jacobson
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7090, USA Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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25
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Manzo C, Torreno-Pina JA, Massignan P, Lapeyre GJ, Lewenstein M, Garcia-Parajo MF. Weak Ergodicity Breaking of Membrane Receptor Motion Stemming from Random Diffusivity. Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.2288] [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: 10/24/2022] Open
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26
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Mivelle M, van Zanten TS, Garcia-Parajo MF. Hybrid photonic antennas for subnanometer multicolor localization and nanoimaging of single molecules. Nano Lett 2014; 14:4895-4900. [PMID: 25050445 DOI: 10.1021/nl502393b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photonic antennas amplify and confine optical fields at the nanoscale offering excellent perspectives for nanoimaging and nanospectroscopy. Increased resolution beyond the diffraction limit has been demonstrated using a variety of antenna designs, but multicolor nanoscale imaging is precluded by their resonance behavior. Here we report on the design of a novel hybrid antenna probe based on a monopole nanoantenna engineered on a bowtie nanoaperture. The device combines broadband enhanced emission, extreme field confinement down to few nanometers, and zero-background illumination. We demonstrate simultaneous dual-color single molecule nanoimaging with 20 nm resolution and angstrom localization precision, corresponding to 10(3)-fold improvement compared to diffraction-limited optics. When interacting with individual molecules in the near-field, our innovative design enables the emission of 10(4) photon-counts per molecule in a 20 nm excitation region, allowing direct discrimination of spectrally distinct molecules separated by 2.1 ± 0.4 nm. We foresee that background-free nanolight sources will open new horizons in optical nanoscopy and fluorescence spectroscopy by providing multicolor detection of standard fluorescent molecules fully compatible with live cell research.
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Affiliation(s)
- Mathieu Mivelle
- ICFO-Institut de Ciencies Fotoniques , Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
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27
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Borgman KJE, van Zanten TS, Manzo C, Cabezón R, Cambi A, Benítez-Ribas D, Garcia-Parajo MF. Priming by chemokines restricts lateral mobility of the adhesion receptor LFA-1 and restores adhesion to ICAM-1 nano-aggregates on human mature dendritic cells. PLoS One 2014; 9:e99589. [PMID: 24945611 PMCID: PMC4063950 DOI: 10.1371/journal.pone.0099589] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/18/2014] [Indexed: 01/12/2023] Open
Abstract
LFA-1 is a leukocyte specific β2 integrin that plays a major role in regulating adhesion and migration of different immune cells. Recent data suggest that LFA-1 on mature dendritic cells (mDCs) may function as a chemokine-inducible anchor during homing of DCs through the afferent lymphatics into the lymph nodes, by transiently switching its molecular conformational state. However, the role of LFA-1 mobility in this process is not yet known, despite that the importance of lateral organization and dynamics for LFA-1-mediated adhesion regulation is broadly recognized. Using single particle tracking approaches we here show that LFA-1 exhibits higher mobility on resting mDCs compared to monocytes. Lymphoid chemokine CCL21 stimulation of the LFA-1 high affinity state on mDCs, led to a significant reduction of mobility and an increase on the fraction of stationary receptors, consistent with re-activation of the receptor. Addition of soluble monomeric ICAM-1 in the presence of CCL21 did not alter the diffusion profile of LFA-1 while soluble ICAM-1 nano-aggregates in the presence of CCL21 further reduced LFA-1 mobility and readily bound to the receptor. Overall, our results emphasize the importance of LFA-1 lateral mobility across the membrane on the regulation of integrin activation and its function as adhesion receptor. Importantly, our data show that chemokines alone are not sufficient to trigger the high affinity state of the integrin based on the strict definition that affinity refers to the adhesion capacity of a single receptor to its ligand in solution. Instead our data indicate that nanoclustering of the receptor, induced by multi-ligand binding, is required to maintain stable cell adhesion once LFA-1 high affinity state is transiently triggered by inside-out signals.
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Affiliation(s)
| | | | - Carlo Manzo
- ICFO-Institut de Ciències Fotòniques, Barcelona, Spain
| | - Raquel Cabezón
- Department of Gastroenterology, Hospital Clinic de Barcelona, IDIBAPS, Barcelona, Spain
| | - Alessandra Cambi
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Daniel Benítez-Ribas
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) and Centre Esther Koplowitz, Barcelona, Spain
| | - Maria F. Garcia-Parajo
- ICFO-Institut de Ciències Fotòniques, Barcelona, Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
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28
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Cambi A, Lakadamyali M, Lidke DS, Garcia-Parajo MF. Meeting report--Visualizing signaling nanoplatforms at a higher spatiotemporal resolution. J Cell Sci 2014; 126:3817-21. [PMID: 23995382 DOI: 10.1242/jcs.137901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The International Symposium entitled ‘Visualizing signaling nanoplatforms at a higher spatiotemporal resolution’ sponsored by the Institució Catalana de Recerca i Estudis Avançats (ICREA) was held on 29–31 May 2013 at the ICFO-Institute of Photonic Sciences, in Barcelona, Spain. The meeting brought together a multidisciplinary group of international leaders in the fields of super-resolution imaging (nanoscopy) and cell membrane biology, and served as a forum to further our understanding of the fundamental mechanisms that govern nanostructures and protein–function relationships at the cell membrane.
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Affiliation(s)
- Alessandra Cambi
- Department of Tumor Immunology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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29
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Mivelle M, Van Zanten TS, Manzo C, Garcia-Parajo MF. Nanophotonic approaches for nanoscale imaging and single-molecule detection at ultrahigh concentrations. Microsc Res Tech 2014; 77:537-45. [DOI: 10.1002/jemt.22369] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/28/2014] [Accepted: 03/27/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Mathieu Mivelle
- ICFO-Institut de Ciencies Fotoniques; Mediterranean Technology Park; Castelldefels 08860 Barcelona Spain
| | - Thomas. S. Van Zanten
- ICFO-Institut de Ciencies Fotoniques; Mediterranean Technology Park; Castelldefels 08860 Barcelona Spain
| | - Carlo Manzo
- ICFO-Institut de Ciencies Fotoniques; Mediterranean Technology Park; Castelldefels 08860 Barcelona Spain
| | - Maria F. Garcia-Parajo
- ICFO-Institut de Ciencies Fotoniques; Mediterranean Technology Park; Castelldefels 08860 Barcelona Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats; 08010 Barcelona Spain
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30
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Torreno-Pina JA, Aichinger M, Manzo C, Salio M, Cerundolo V, Garcia-Parajo MF. The Actin Cytoskeleton Controls the Activation of Invariant Natural Killer T Cells by Fine-Tuning CD1d Nanoscale Aggregation on Antigen Presenting Cells. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.1394] [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: 11/29/2022] Open
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31
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Manzo C, Torreno-Pina JA, van Zanten TS, Garcia-Parajo MF. Automated Algorithm for Quantitative Analysis of Fluorescence Nanoscopy Images. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.3688] [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: 11/28/2022] Open
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32
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Eich C, de Keijzer S, van Zanten T, Bakker GJ, Figdor CG, Garcia-Parajo MF, Cambi A. Integrating High-Resolution Bioimaging Techniques to Unravel How Membrane Lipids Influence Nanoscale Organization and Lateral Mobility of Adhesion Receptors. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.3391] [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: 11/26/2022] Open
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33
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Torreno-Pina JA, Manzo C, Figdor CG, Cambi A, Garcia-Parajo MF. The Neck Region Regulates Spatiotemporal Organization and Virus-Binding Capability of the Pathogen Recognition Receptor DC-Sign. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.3382] [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: 11/29/2022] Open
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34
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Mivelle M, van Zanten TS, Neumann L, van Hulst NF, Garcia-Parajo MF. Ultrabright bowtie nanoaperture antenna probes studied by single molecule fluorescence. Nano Lett 2012; 12:5972-5978. [PMID: 23098104 DOI: 10.1021/nl303440w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report on a novel design for the fabrication of ultrabright bowtie nanoaperture antenna (BNA) probes to breach the intrinsic trade-off between power transmission and field confinement of circular nanoapertures as in near-field scanning optical microscopy (NSOM) or planar zero mode waveguides. The approach relies on the nanofabrication of BNAs at the apex of tapered optical fibers tuned to diameters close to their cutoff region, resulting in 10(3)× total improvement in throughput over conventional NSOM probes of similar confinement area. By using individual fluorescence molecules as optical nanosensors, we show for the first time nanoimaging of single molecules using BNA probes with an optical confinement of 80 nm, measured the 3D near-field emanating from these nanostructures and determined a ~6-fold enhancement on the single molecule signal. The broadband field enhancement, nanoscale confinement, and background free illumination provided by these nanostructures offer excellent perspectives as ultrabright optical nanosources for a full range of applications, including cellular nanoimaging, spectroscopy, and biosensing.
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Affiliation(s)
- Mathieu Mivelle
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain
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35
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Manzo C, Torreno-Pina JA, Joosten B, Reinieren-Beeren I, Gualda EJ, Loza-Alvarez P, Figdor CG, Garcia-Parajo MF, Cambi A. The neck region of the C-type lectin DC-SIGN regulates its surface spatiotemporal organization and virus-binding capacity on antigen-presenting cells. J Biol Chem 2012; 287:38946-55. [PMID: 23019323 DOI: 10.1074/jbc.m112.380121] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The C-type lectin DC-SIGN expressed on dendritic cells (DCs) facilitates capture and internalization of a plethora of different pathogens. Although it is known that DC-SIGN organizes in nanoclusters at the surface of DCs, the molecular mechanisms responsible for this well defined nanopatterning and role in viral binding remain enigmatic. By combining biochemical and advanced biophysical techniques, including optical superresolution and single particle tracking, we demonstrate that DC-SIGN intrinsic nanoclustering strictly depends on its molecular structure. DC-SIGN nanoclusters exhibited free, Brownian diffusion on the cell membrane. Truncation of the extracellular neck region, known to abrogate tetramerization, significantly reduced nanoclustering and concomitantly increased lateral diffusion. Importantly, DC-SIGN nanocluster dissolution exclusively compromised binding to nanoscale size pathogens. Monte Carlo simulations revealed that heterogeneity on nanocluster density and spatial distribution confers broader binding capabilities to DC-SIGN. As such, our results underscore a direct relationship between spatial nanopatterning, driven by intermolecular interactions between the neck regions, and receptor diffusion to provide DC-SIGN with the exquisite ability to dock pathogens at the virus length scale. Insight into how virus receptors are organized prior to virus binding and how they assemble into functional platforms for virus docking is helpful to develop novel strategies to prevent virus entry and infection.
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Affiliation(s)
- Carlo Manzo
- Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
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36
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Abstract
Living cells use surface molecules such as receptors and sensors to acquire information about and to respond to their environments. The cell surface machinery regulates many essential cellular processes, including cell adhesion, tissue development, cellular communication, inflammation, tumor metastasis, and microbial infection. These events often involve multimolecular interactions occurring on a nanometer scale and at very high molecular concentrations. Therefore, understanding how single-molecules localize, assemble, and interact on the surface of living cells is an important challenge and a difficult one to address because of the lack of high-resolution single-molecule imaging techniques. In this Account, we show that atomic force microscopy (AFM) and near-field scanning optical microscopy (NSOM) provide unprecedented possibilities for mapping the distribution of single molecules on the surfaces of cells with nanometer spatial resolution, thereby shedding new light on their highly sophisticated functions. For single-molecule recognition imaging by AFM, researchers label the tip with specific antibodies or ligands and detect molecular recognition signals on the cell surface using either adhesion force or dynamic recognition force mapping. In single-molecule NSOM, the tip is replaced by an optical fiber with a nanoscale aperture. As a result, topographic and optical images are simultaneously generated, revealing the spatial distribution of fluorescently labeled molecules. Recently, researchers have made remarkable progress in the application of near-field nanoscopy to image the distribution of cell surface molecules. Those results have led to key breakthroughs: deciphering the nanoscale architecture of bacterial cell walls; understanding how cells assemble surface receptors into nanodomains and modulate their functional state; and understanding how different components of the cell membrane (lipids, proteins) assemble and communicate to confer efficient functional responses upon cell activation. We anticipate that the next steps in the evolution of single-molecule near-field nanoscopy will involve combining single-molecule imaging with single-molecule force spectroscopy to simultaneously measure the localization, elasticity, and interactions of cell surface molecules. In addition, progress in high-speed AFM should allow researchers to image single cell surface molecules at unprecedented temporal resolution. In parallel, exciting advances in the fields of photonic antennas and plasmonics may soon find applications in cell biology, enabling true nanoimaging and nanospectroscopy of individual molecules in living cells.
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Affiliation(s)
- Peter Hinterdorfer
- Institute for Biophysics, Christian
Doppler Laboratory of Nanoscopic Methods in Biophysics, Johannes Kepler University Linz, Altenbergerstrasse
69, A-4040 Linz, Austria
| | - Maria F. Garcia-Parajo
- ICFO-The Institute of Photonic Sciences, Mediterranean Technology Park,
08860 Castelldefels (Barcelona), Spain, and ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010
Barcelona, Spain
| | - Yves F. Dufrêne
- Institute of Condensed Matter
and Nanosciences, Université catholique de Louvain, Croix du Sud 2/18, B-1348 Louvain-la-Neuve, Belgium
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37
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Abstract
Cells respond to biochemical and mechanical stimuli through a series of steps that begin at the molecular, nanometre level, and translate finally in global cell response. Defects in biochemical- and/or mechanical-sensing, transduction or cellular response are the cause of multiple diseases, including cancer and immune disorders among others. Within the booming field of regenerative medicine, there is an increasing need for developing and applying nanotechnology tools to bring understanding on the cellular machinery and molecular interactions at the nanoscale. Nanotechnology, nanophotonics and in particular, high-resolution-based fluorescence approaches are already delivering crucial information on the way that cells respond to their environment and how they organize their receptors to perform specialized functions. This chapter focuses on emerging super-resolution optical techniques, summarizing their principles, technical implementation, and reviewing some of the achievements reached so far.
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Affiliation(s)
- Maria F Garcia-Parajo
- BioNanoPhotonics Group, IBEC - Institute for Bioengineering of Catalonia and CIBER-BBN, Barcelona, Spain.
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38
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van den Dries K, van Helden SFG, te Riet J, Diez-Ahedo R, Manzo C, Oud MM, van Leeuwen FN, Brock R, Garcia-Parajo MF, Cambi A, Figdor CG. Geometry sensing by dendritic cells dictates spatial organization and PGE(2)-induced dissolution of podosomes. Cell Mol Life Sci 2011; 69:1889-901. [PMID: 22204022 PMCID: PMC3350765 DOI: 10.1007/s00018-011-0908-y] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [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: 05/27/2011] [Revised: 11/28/2011] [Accepted: 12/13/2011] [Indexed: 01/01/2023]
Abstract
Assembly and disassembly of adhesion structures such as focal adhesions (FAs) and podosomes regulate cell adhesion and differentiation. On antigen-presenting dendritic cells (DCs), acquisition of a migratory and immunostimulatory phenotype depends on podosome dissolution by prostaglandin E2 (PGE2). Whereas the effects of physico-chemical and topographical cues have been extensively studied on FAs, little is known about how podosomes respond to these signals. Here, we show that, unlike for FAs, podosome formation is not controlled by substrate physico-chemical properties. We demonstrate that cell adhesion is the only prerequisite for podosome formation and that substrate availability dictates podosome density. Interestingly, we show that DCs sense 3-dimensional (3-D) geometry by aligning podosomes along the edges of 3-D micropatterned surfaces. Finally, whereas on a 2-dimensional (2-D) surface PGE2 causes a rapid increase in activated RhoA levels leading to fast podosome dissolution, 3-D geometric cues prevent PGE2-mediated RhoA activation resulting in impaired podosome dissolution even after prolonged stimulation. Our findings indicate that 2-D and 3-D geometric cues control the spatial organization of podosomes. More importantly, our studies demonstrate the importance of substrate dimensionality in regulating podosome dissolution and suggest that substrate dimensionality plays an important role in controlling DC activation, a key process in initiating immune responses.
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Affiliation(s)
- Koen van den Dries
- Department of Tumor Immunology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
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Manzo C, van Zanten TS, Garcia-Parajo MF. Nanoscale fluorescence correlation spectroscopy on intact living cell membranes with NSOM probes. Biophys J 2011; 100:L8-10. [PMID: 21244822 DOI: 10.1016/j.bpj.2010.12.3690] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 11/30/2010] [Accepted: 12/03/2010] [Indexed: 12/13/2022] Open
Abstract
Characterization of molecular dynamics on living cell membranes at the nanoscale is fundamental to unravel the mechanisms of membrane organization and compartmentalization. Here we demonstrate the feasibility of fluorescence correlation spectroscopy (FCS) based on the nanometric illumination of near-field scanning optical microscopy (NSOM) probes on intact living cells. NSOM-FCS applied to fluorescent lipid analogs allowed us to reveal details of the diffusion hidden by larger illumination areas. Moreover, the technique offers the unique advantages of evanescent axial illumination and straightforward implementation of multiple color excitation. As such, NSOM-FCS represents a powerful tool to study a variety of dynamic processes occurring at the nanometer scale on cell membranes.
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Hofer M, Adamsmaier S, van Zanten TS, Chtcheglova LA, Manzo C, Duman M, Mayer B, Ebner A, Moertelmaier M, Kada G, Garcia-Parajo MF, Hinterdorfer P, Kienberger F. Molecular recognition imaging using tuning fork-based transverse dynamic force microscopy. Ultramicroscopy 2010; 110:605-11. [PMID: 20226591 DOI: 10.1016/j.ultramic.2010.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We demonstrate simultaneous transverse dynamic force microscopy and molecular recognition imaging using tuning forks as piezoelectric sensors. Tapered aluminum-coated glass fibers were chemically functionalized with biotin and anti-lysozyme molecules and attached to one of the prongs of a 32kHz tuning fork. The lateral oscillation amplitude of the tuning fork was used as feedback signal for topographical imaging of avidin aggregates and lysozyme molecules on mica substrate. The phase difference between the excitation and detection signals of the tuning fork provided molecular recognition between avidin/biotin or lysozyme/anti-lysozyme. Aggregates of avidin and lysozyme molecules appeared as features with heights of 1-4nm in the topographic images, consistent with single molecule atomic force microscopy imaging. Recognition events between avidin/biotin or lysozyme/anti-lysozyme were detected in the phase image at high signal-to-noise ratio with phase shifts of 1-2 degrees. Because tapered glass fibers and shear-force microscopy based on tuning forks are commonly used for near-field scanning optical microscopy (NSOM), these results open the door to the exciting possibility of combining optical, topographic and biochemical recognition at the nanometer scale in a single measurement and in liquid conditions.
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Affiliation(s)
- Manuel Hofer
- University of Linz, Institute for Biophysics, Altenbergerstr. 69, Linz, Austria
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van Zanten TS, Lopez-Bosque MJ, Garcia-Parajo MF. Imaging individual proteins and nanodomains on intact cell membranes with a probe-based optical antenna. Small 2010; 6:270-275. [PMID: 19943247 DOI: 10.1002/smll.200901204] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Optical antennas that confine and enhance electromagnetic fields in a nanometric region hold great potential for nanobioimaging and biosensing. Probe-based monopole optical antennas are fabricated to enhance fields localized to <30 nm near the antenna apex in aqueous conditions. These probes are used under appropriate excitation antenna conditions to image individual antibodies with an unprecedented resolution of 26 +/- 4 nm and virtually no surrounding background. On intact cell membranes in physiological conditions, the obtained resolution is 30 +/- 6 nm. Importantly, the method allows individual proteins to be distinguished from nanodomains and the degree of clustering to be quantified by directly measuring physical size and intensity of individual fluorescent spots. Improved antenna geometries should lead to true live cell imaging below 10-nm resolution with position accuracy in the subnanometric range.
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Affiliation(s)
- Thomas S van Zanten
- BioNanoPhotonics Group, IBEC-Institute for Bioengineering of Catalonia and CIBER-bbn, Baldiri Reixac 15-21, Barcelona, Spain
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Diez-Ahedo R, Normanno D, Esteban O, Bakker GJ, Figdor CG, Cambi A, Garcia-Parajo MF. Dynamic re-organization of individual adhesion nanoclusters in living cells by ligand-patterned surfaces. Small 2009; 5:1258-1263. [PMID: 19367602 DOI: 10.1002/smll.200801699] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Ruth Diez-Ahedo
- CIBER-Bioengineering Biomateriales and Nanomedicine and BioNanoPhotonics Group IBEC-Institut de Bioenginyeria de Catalunya Baldiri Reixac 15-21, 08028 Barcelona, Spain
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de Bakker BI, de Lange F, Cambi A, Korterik JP, van Dijk EMHP, van Hulst NF, Figdor CG, Garcia-Parajo MF. Cover Picture: Nanoscale Organization of the Pathogen Receptor DC-SIGN Mapped by Single-Molecule High-Resolution Fluorescence Microscopy (ChemPhysChem 10/2007). Chemphyschem 2007. [DOI: 10.1002/cphc.200790029] [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: 11/08/2022]
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de Bakker BI, de Lange F, Cambi A, Korterik JP, van Dijk EMHP, van Hulst NF, Figdor CG, Garcia-Parajo MF. Nanoscale Organization of the Pathogen Receptor DC-SIGN Mapped by Single-Molecule High-Resolution Fluorescence Microscopy. Chemphyschem 2007; 8:1473-80. [PMID: 17577901 DOI: 10.1002/cphc.200700169] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
DC-SIGN, a C-type lectin exclusively expressed on dendritic cells (DCs), plays an important role in pathogen recognition by binding with high affinity to a large variety of microorganisms. Recent experimental evidence points to a direct relation between the function of DC-SIGN as a viral receptor and its spatial arrangement on the plasma membrane. We have investigated the nanoscale organization of fluorescently labeled DC-SIGN on intact isolated DCs by means of near-field scanning optical microscopy (NSOM) combined with single-molecule detection. Fluorescence spots of different intensity and size have been directly visualized by optical means with a spatial resolution of less than 100 nm. Intensity- and size-distribution histograms of the DC-SIGN fluorescent spots confirm that approximately 80 % of the receptors are organized in nanosized domains randomly distributed on the cell membrane. Intensity-size correlation analysis revealed remarkable heterogeneity in the molecular packing density of the domains. Furthermore, we have mapped the intermolecular organization within a dense cluster by means of sequential NSOM imaging combined with discrete single-molecule photobleaching. In this way we have determined the spatial coordinates of 13 different individual dyes, with a localization accuracy of 6 nm. Our experimental observations are all consistent with an arrangement of DC-SIGN designed to maximize its chances of binding to a wide range of microorganisms. Our data also illustrate the potential of NSOM as an ultrasensitive, high-resolution technique to probe nanometer-scale organization of molecules on the cell membrane.
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Affiliation(s)
- Bärbel I de Bakker
- Applied Optics Group, Faculty of Science & Technology, MESA+ Institute for Nanotechnology, University of Twente, The Netherlands
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Mela P, Onclin S, Goedbloed MH, Levi S, Garcia-Parajo MF, van Hulst NF, Ravoo BJ, Reinhoudt DN, van den Berg A. Monolayer-functionalized microfluidics devices for optical sensing of acidity. Lab Chip 2005; 5:163-170. [PMID: 15672130 DOI: 10.1039/b409978h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This paper describes the integration of opto-chemosensors in microfluidics networks. Our technique exploits the internal surface of the network as a platform to build a sensing system by coating the surface with a self-assembled monolayer and subsequently binding a fluorescent sensing molecule to the monolayer. Fluorescent molecules were used that can switch between a fluorescent and a non-fluorescent state, depending on the acidity of the surrounding solution. Two systems were investigated. The first employs surface confinement of a Rhodamine B dye in a glass micro channel that serves as a molecular switch in organic solutions. Upon rinsing the micro channels with acidic or basic solutions it was possible to switch between the fluorescent and non-fluorescent forms reversibly. Moreover, this system could be used to monitor the mixing of two solutions of different acidity along the micro channel. To widen the scope of optical sensing in micro channels an Oregon Green dye derivative was immobilized, which functions as a sensing molecule for pH differences in aqueous solutions. In this case, a hybrid system was used consisting of a glass slide and PDMS channels. The fluorescence intensity was found to be directly correlated to the pH of the solution in contact, indicating the possibility of using such a system as a pH sensor. These systems allow real-time measurements and can be easily implemented in micro- and nanofluidics systems thus enabling analysis of extremely small sample volumes in a fast and reproducible manner.
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Affiliation(s)
- P Mela
- Applied Optics Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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Koopman M, Cambi A, de Bakker BI, Joosten B, Figdor CG, van Hulst NF, Garcia-Parajo MF. Near-field scanning optical microscopy in liquid for high resolution single molecule detection on dendritic cells. FEBS Lett 2004; 573:6-10. [PMID: 15327966 DOI: 10.1016/j.febslet.2004.07.035] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2004] [Revised: 06/14/2004] [Accepted: 07/06/2004] [Indexed: 11/27/2022]
Abstract
Clustering of cell surface receptors into micro-domains in the plasma membrane is an important mechanism for regulating cellular functions. Unfortunately, these domains are often too small to be resolved with conventional optical microscopy. Near-field scanning optical microscopy (NSOM) is a relatively new technique that combines ultra high optical resolution, down to 70 nm, with single molecule detection sensitivity. As such, the technique holds great potential for direct visualisation of domains at the cell surface. Yet, NSOM operation under liquid conditions is far from trivial. In this contribution, we show that the performance of NSOM can be extended to measurements in liquid environments using a diving bell concept. For the first time, individual fluorescent molecules on the membrane of cells in solution are imaged with a spatial resolution of 90 nm. Furthermore, using this technique we have been able to directly visualise nanometric sized domains of the C-type lectin DC-SIGN on the membrane of dendritic cells, both in air and in liquid.
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Affiliation(s)
- M Koopman
- Applied Optics group, Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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Garcia-Parajo MF, Koopman M, van Dijk EM, Subramaniam V, van Hulst NF. The nature of fluorescence emission in the red fluorescent protein DsRed, revealed by single-molecule detection. Proc Natl Acad Sci U S A 2001; 98:14392-7. [PMID: 11724943 PMCID: PMC64692 DOI: 10.1073/pnas.251525598] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recent studies on the newly cloned red fluorescence protein DsRed from the Discosoma genus have shown its tremendous advantages: bright red fluorescence and high resistance against photobleaching. However, it has also become clear that the protein forms closely packed tetramers, and there is indication for incomplete protein maturation with unknown proportion of immature green species. We have applied single-molecule methodology to elucidate the nature of the fluorescence emission in the DsRed. Real-time fluorescence trajectories have been acquired with polarization sensitive detection. Our results indicate that energy transfer between identical monomers occurs efficiently with red emission arising equally likely from any of the chromophoric units. Photodissociation of one of the chromophores weakly quenches the emission of adjacent ones. Dual color excitation (at 488 and 568 nm) single-molecule microscopy has been performed to reveal the number and distribution of red vs. green species within each tetramer. We find that 86% of the DsRed contain at least one green species with a red-to-green ratio of 1.2-1.5. On the basis of our findings, oligomer suppression would not only be advantageous for protein fusion but will also increase the fluorescence emission of individual monomers.
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Affiliation(s)
- M F Garcia-Parajo
- Applied Optics Group, Department of Applied Physics and MESA(+) Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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Abstract
The inexpensive fabrication of high-quality probes for near-field optical applications is still unsolved although several methods for integrated fabrication have been proposed in the past. A further drawback is the intensity loss of the transmitted light in the 'cut-off' region near the aperture in tapered optical fibres typically used as near-field probes. As a remedy for these limitations we suggest here a new wafer-scale semibatch microfabrication process for transparent photoplastic probes. The process starts with the fabrication of a pyramidal mould in silicon by using the anisotropic etchant potassium hydroxide. This results in an inverted pyramid limited by < 111 > silicon crystal planes having an angle of approximately 54 degrees. The surface including the mould is covered by a approximately 1.5 nm thick organic monolayer of dodecyltrichlorosilane (DTS) and a 100-nm thick evaporated aluminium film. Two layers of photoplastic material are then spin-coated (thereby conformal filling the mould) and structured by lithography to form a cup for the optical fibre microassembly. The photoplastic probes are finally lifted off mechanically from the mould with the aluminium coating. Focused ion beam milling has been used to subsequently form apertures with diameters in the order of 80 nm. The advantage of our method is that the light to the aperture area can be directly coupled into the probe by using existing fibre-based NSOM set-ups, without the need for far-field alignment, which is typically necessary for cantilevered probes. We have evidence that the aluminium layer is considerably smoother compared to the 'grainy' layers typically evaporated on free-standing probes. The optical throughput efficiency was measured to be about 10-4. This new NSOM probe was directly bonded to a tuning fork sensor for the shear force control and the topography of a polymer sample was successfully obtained.
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Affiliation(s)
- B J Kim
- Strategic Research Orientation NanoLink and Applied Optics Group, MESA+ Research Institute, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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Garcia-Parajo MF, Segers-Nolten GM, Veerman JA, Greve J, van Hulst NF. Real-time light-driven dynamics of the fluorescence emission in single green fluorescent protein molecules. Proc Natl Acad Sci U S A 2000; 97:7237-42. [PMID: 10860989 PMCID: PMC16529 DOI: 10.1073/pnas.97.13.7237] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Real-time single-molecule fluorescence detection using confocal and near-field scanning optical microscopy has been applied to elucidate the nature of the "on-off" blinking observed in the Ser-65 --> Thr (S65T) mutant of the green fluorescent protein (GFP). Fluorescence time traces as a function of the excitation intensity, with a time resolution of 100 micros and observation times up to 65 s, reveal the existence of a nonemissive state responsible for the long dark intervals in the GFP. We find that excitation intensity has a dramatic effect on the blinking. Whereas the time during which the fluorescence is on becomes shorter as the intensity is increased, the off-times are independent of excitation intensity. Statistical analysis of the on- and off-times renders a characteristic off-time of 1.6 +/- 0.2 s and allows us to calculate a transition yield of approximately 0.5 x 10(-5) from the emissive to the nonemissive state. The saturation excitation intensity at which on- and off-times are equal is approximately 1.5 kW/cm(2). On the basis of the single-molecule data we calculate an absorption cross section of 6.5 x 10(-17) cm(2) for the S65T mutant. These results have important implications for the use of the GFP to follow dynamic processes in time at the single-molecular level.
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Affiliation(s)
- M F Garcia-Parajo
- Applied Optics Group and Biophysical Techniques, Department of Applied Physics and MESA(+) Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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Garcia-Parajo MF, Veerman JA, Segers-Nolten GM, de Grooth BG, Greve J, van Hulst NF. Visualising individual green fluorescent proteins with a near field optical microscope. Cytometry 1999; 36:239-46. [PMID: 10404974 DOI: 10.1002/(sici)1097-0320(19990701)36:3<239::aid-cyto14>3.3.co;2-p] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The use of the green fluorescence protein (GFP) as an individual marker for applications in molecular biology requires detailed understanding of its photophysical and photodynamical properties. We investigated individual S65T mutants of GFP both on a glass surface and embedded in a water-pore gel. An aperture-type near field scanning optical microscope (NSOM) with two polarisation detection channels was applied to afford high spatial (approximately 70 nm) and temporal (0.5 ms) resolution. Shear-force and near field fluorescence imaging were performed simultaneously, allowing direct correlation between topographic and optical features. Polarisation data showed that the emission dipole moment of the proteins is fixed in space within both the barrel structure of the protein and the gel matrix used for spatial confinement of the proteins. The photophysical behaviour of the S65T-GFP mutants was monitored in time, with 500-micros real-time resolution and continuous imaging for periods of more than 2 h. Our results show the reversible on-off behaviour on a time scale that spans from 10(-4) to 10(3) s. Even a process generally identified as "bleaching" turns out to be reversible if a sufficient long observation time is allowed. As such, the photodynamics of individual GFPs appear to be much more complex than the properties deduced from ensemble-averaged measurements.
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Affiliation(s)
- M F Garcia-Parajo
- Department of Applied Physics & MESA Research Institute, University of Twente, Enschede, The Netherlands.
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