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Li M, Xing X, Yuan J, Zeng Z. Research progress on the regulatory role of cell membrane surface tension in cell behavior. Heliyon 2024; 10:e29923. [PMID: 38720730 PMCID: PMC11076917 DOI: 10.1016/j.heliyon.2024.e29923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 05/12/2024] Open
Abstract
Cell membrane surface tension has emerged as a pivotal biophysical factor governing cell behavior and fate. This review systematically delineates recent advances in techniques for cell membrane surface tension quantification, mechanosensing mechanisms, and regulatory roles of cell membrane surface tension in modulating major cellular processes. Micropipette aspiration, tether pulling, and newly developed fluorescent probes enable the measurement of cell membrane surface tension with spatiotemporal precision. Cells perceive cell membrane surface tension via conduits including mechanosensitive ion channels, curvature-sensing proteins (e.g. BAR domain proteins), and cortex-membrane attachment proteins (e.g. ERM proteins). Through membrane receptors like integrins, cells convert mechanical cues into biochemical signals. This conversion triggers cytoskeletal remodeling and extracellular matrix interactions in response to environmental changes. Elevated cell membrane surface tension suppresses cell spreading, migration, and endocytosis while facilitating exocytosis. Moreover, reduced cell membrane surface tension promotes embryonic stem cell differentiation and cancer cell invasion, underscoring cell membrane surface tension as a regulator of cell plasticity. Outstanding questions remain regarding cell membrane surface tension regulatory mechanisms and roles in tissue development/disease in vivo. Emerging tools to manipulate cell membrane surface tension with high spatiotemporal control in combination with omics approaches will facilitate the elucidation of cell membrane surface tension-mediated effects on signaling networks across various cell types/states. This will accelerate the development of cell membrane surface tension-based biomarkers and therapeutics for regenerative medicine and cancer. Overall, this review provides critical insights into cell membrane surface tension as a potent orchestrator of cell function, with broader impacts across mechanobiology.
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Affiliation(s)
- Manqing Li
- School of Public Health, Sun Yat-sen University, Guangzhou, 5180080, China
| | - Xiumei Xing
- School of Public Health, Sun Yat-sen University, Guangzhou, 5180080, China
| | - Jianhui Yuan
- Nanshan District Center for Disease Control and Prevention, Shenzhen, 518054, China
| | - Zhuoying Zeng
- The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen University, Shenzhen, 518035, China
- Chemical Analysis & Physical Testing Institute, Shenzhen Center for Disease Control and Prevention, Shenzhen, 518055, China
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2
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Reja SI, Minoshima M, Hori Y, Kikuchi K. Recent advancements of fluorescent biosensors using semisynthetic probes. Biosens Bioelectron 2024; 247:115862. [PMID: 38147718 DOI: 10.1016/j.bios.2023.115862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 11/07/2023] [Accepted: 11/17/2023] [Indexed: 12/28/2023]
Abstract
Fluorescent biosensors are crucial experimental tools for live-cell imaging and the quantification of different biological analytes. Fluorescent protein (FP)-based biosensors are widely used for imaging applications in living systems. However, the use of FP-based biosensors is hindered by their large size, poor photostability, and laborious genetic manipulations required to improve their properties. Recently, semisynthetic fluorescent biosensors have been developed to address the limitations of FP-based biosensors using chemically modified fluorescent probes and self-labeling protein tag/peptide tags or DNA/RNA-based hybrid systems. Semisynthetic biosensors have unique advantages, as they can be easily modified using different probes. Moreover, the self-labeling protein tag, which labels synthetically developed ligands via covalent bonds, has immense potential for biosensor development. This review discusses the recent progress in different types of fluorescent biosensors for metabolites, protein aggregation and degradation, DNA methylation, endocytosis and exocytosis, membrane tension, and cellular viscosity. Here, we explain in detail the design strategy and working principle of these biosensors. The information presented will help the reader to create new biosensors using self-labeling protein tags for various applications.
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Affiliation(s)
- Shahi Imam Reja
- Immunology Frontier Research Center (IFReC), Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masafumi Minoshima
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yuichiro Hori
- Department of Chemistry, Faculty of Science, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kazuya Kikuchi
- Immunology Frontier Research Center (IFReC), Osaka University, Suita, Osaka, 565-0871, Japan; Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.
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3
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Ma J, Sun R, Xia K, Xia Q, Liu Y, Zhang X. Design and Application of Fluorescent Probes to Detect Cellular Physical Microenvironments. Chem Rev 2024; 124:1738-1861. [PMID: 38354333 DOI: 10.1021/acs.chemrev.3c00573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
The microenvironment is indispensable for functionality of various biomacromolecules, subcellular compartments, living cells, and organisms. In particular, physical properties within the biological microenvironment could exert profound effects on both the cellular physiology and pathology, with parameters including the polarity, viscosity, pH, and other relevant factors. There is a significant demand to directly visualize and quantitatively measure the fluctuation in the cellular microenvironment with spatiotemporal resolution. To satisfy this need, analytical methods based on fluorescence probes offer great opportunities due to the facile, sensitive, and dynamic detection that these molecules could enable in varying biological settings from in vitro samples to live animal models. Herein, we focus on various types of small molecule fluorescent probes for the detection and measurement of physical parameters of the microenvironment, including pH, polarity, viscosity, mechanical force, temperature, and electron potential. For each parameter, we primarily describe the chemical mechanisms underlying how physical properties are correlated with changes of various fluorescent signals. This review provides both an overview and a perspective for the development of small molecule fluorescent probes to visualize the dynamic changes in the cellular environment, to expand the knowledge for biological process, and to enrich diagnostic tools for human diseases.
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Affiliation(s)
- Junbao Ma
- Department of Chemistry and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
- Westlake Laboratory of Life Sciences and Biomedicine, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310030, Zhejiang Province, China
| | - Rui Sun
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Kaifu Xia
- Department of Chemistry and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
- Westlake Laboratory of Life Sciences and Biomedicine, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310030, Zhejiang Province, China
| | - Qiuxuan Xia
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Yu Liu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
- State Key Laboratory of Medical Proteomics, National Chromatographic R. & A. Center, Chinese Academy of Sciences Dalian Liaoning 116023, China
| | - Xin Zhang
- Department of Chemistry and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
- Westlake Laboratory of Life Sciences and Biomedicine, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
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4
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Schwayer C, Brückner DB. Connecting theory and experiment in cell and tissue mechanics. J Cell Sci 2023; 136:jcs261515. [PMID: 38149871 DOI: 10.1242/jcs.261515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Abstract
Understanding complex living systems, which are fundamentally constrained by physical phenomena, requires combining experimental data with theoretical physical and mathematical models. To develop such models, collaborations between experimental cell biologists and theoreticians are increasingly important but these two groups often face challenges achieving mutual understanding. To help navigate these challenges, this Perspective discusses different modelling approaches, including bottom-up hypothesis-driven and top-down data-driven models, and highlights their strengths and applications. Using cell mechanics as an example, we explore the integration of specific physical models with experimental data from the molecular, cellular and tissue level up to multiscale input. We also emphasize the importance of constraining model complexity and outline strategies for crosstalk between experimental design and model development. Furthermore, we highlight how physical models can provide conceptual insights and produce unifying and generalizable frameworks for biological phenomena. Overall, this Perspective aims to promote fruitful collaborations that advance our understanding of complex biological systems.
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Affiliation(s)
- Cornelia Schwayer
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - David B Brückner
- Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria
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5
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Li C, Kiefel MJ. Facile dione protection to benzo[1,2- b:6,5- b']dithiophene-4,5-dione (BDTD) in triggering ultraviolet emission - A new member of the emissive 3,3'-bridged dithiophenes. RSC Adv 2023; 13:4713-4720. [PMID: 36760278 PMCID: PMC9900312 DOI: 10.1039/d2ra07492c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 01/25/2023] [Indexed: 02/09/2023] Open
Abstract
To date, 3,3'-bridged dithiophenes with bridges developed from the first period elements (either pristine or oxidised) are non emissive. Benzo[1,2-b:6,5-b']dithiophene-4,5-dione (BDTD) is a typical 3,3' fused-dithiophene with a dione bridge. It is a critical building block for semiconducting materials, and it is non emissive. We serendipitously discovered that by protecting the diketone of BDTD with ethylene glycol, two isomers (BDTD-5 and 6) were obtained and both compounds effectively emit UV light in solution. Their maximum emission (382 and 375 nm for BDTD-5 and 6, respectively) are independent of the type of solvent. Both compounds exhibited fluorescence intensity enhancement in DMF-H2O with the increase of water fraction from 0-90%. BDTD-6 can also effectively emit in its crystalline state with a quantum yield (QY) of 14% and an average fluorescence lifetime of 1.6 ns. X-ray crystallographic analysis indicates that BDTD-6 possesses a 3D C-H…O interaction structure which produced its effective emission in the crystalline state. These two isomers not only have enlarged the emissive members of the 3,3'-fused dithiophene family, but also expand the emission boundary of emitters in this category to the UV area.
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Affiliation(s)
- Chengpeng Li
- Institute for Glycomics, Griffith University Parklands Drive Southport QLD 4222 Australia
| | - Milton J. Kiefel
- Institute for Glycomics, Griffith UniversityParklands DriveSouthportQLD4222Australia
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6
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Ho PY, Chou TY, Kam C, Huang W, He Z, Ngan AH, Chen S. A dual organelle-targeting mechanosensitive probe. SCIENCE ADVANCES 2023; 9:eabn5390. [PMID: 36630498 PMCID: PMC9833668 DOI: 10.1126/sciadv.abn5390] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Cells are responsive to the mechanical environment, but the methods to detect simultaneously how different organelles react in mechanobiological processes remain largely unexplored. We herein report a dual organelle-targeting fluorescent probe, (E)-1-[3-(diethoxyphosphoryl)propyl]-4-[4-(diethylamino)styryl]pyridin-1-ium bromide (ASP-PE), for mechanical mapping in live cells. ASP-PE is aggregation-induced emission active and is sensitive to the local mechanical environment. It targets the plasma membrane (PM) and intracellular mitochondria in cells by its phosphonate moiety and pyridinium. In this work, through ASP-PE staining, changes of membrane tension in the PM and mitochondria in response to varied osmotic pressure and substrate stiffness are visualized using fluorescence lifetime imaging microscopy. The mechanobiological importance of actin filaments and microtubules in the PM and mitochondria is also investigated using this probe. Computational simulations are applied to study the sensing mechanism of the probe. This study introduces a unique tool for mapping the membrane tension in the PM and mitochondria together, providing us great opportunities to study organelle's interactions in mechanobiology.
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Affiliation(s)
- Po-Yu Ho
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, P. R. China
| | - Tsu Yu Chou
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, P. R. China
| | - Chuen Kam
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, P. R. China
| | - Wenbin Huang
- School of Science, Harbin Institute of Technology, Shenzhen, HIT Campus of University Town, Shenzhen 518055, P. R. China
| | - Zikai He
- School of Science, Harbin Institute of Technology, Shenzhen, HIT Campus of University Town, Shenzhen 518055, P. R. China
| | - Alfonso H. W. Ngan
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sijie Chen
- Ming Wai Lau Centre for Reparative Medicine, Karolinska Institutet, Hong Kong, P. R. China
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7
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Saha A, Mandal S, Arafiles JVV, Gómez‐González J, Hackenberger CPR, Brik A. Structure-Uptake Relationship Study of DABCYL Derivatives Linked to Cyclic Cell-Penetrating Peptides for Live-Cell Delivery of Synthetic Proteins. Angew Chem Int Ed Engl 2022; 61:e202207551. [PMID: 36004945 PMCID: PMC9828537 DOI: 10.1002/anie.202207551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 01/12/2023]
Abstract
Modifying cyclic cell-penetrating deca-arginine (cR10) peptides with 4-(4-dimethylaminophenylazo)benzoic acid (DABCYL) improves the uptake efficiency of synthetic ubiquitin (Ub) cargoes into living cells. To probe the role of the DABCYL moiety, we performed time-lapse microscopy and fluorescence lifetime imaging microscopy (FLIM) of fluorescent DABCYL-R10 to evaluate the impact on cell entry by the formation of nucleation zones. Furthermore, we performed a structure-uptake relationship study with 13 DABCYL derivatives coupled to CPP to examine their effect on the cell-uptake efficiency when conjugated to mono-Ub through disulfide linkages. Our results show that through structure variations of the DABCYL moiety alone we could reach, at nanomolar concentration, an additional threefold increase in the cytosolic delivery of Ub, which will enable studies on various intracellular processes related to Ub signaling.
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Affiliation(s)
- Abhishek Saha
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
| | - Shaswati Mandal
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
| | - Jan Vincent V. Arafiles
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
| | - Jacobo Gómez‐González
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
| | - Christian P. R. Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
- Department of ChemistryHumboldt Universität zu BerlinBrook-Taylor-Str.2Berlin12489Germany
| | - Ashraf Brik
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
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8
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Winslow M, Robinson D. Computational development of a phase-sensitive membrane raft probe. Phys Chem Chem Phys 2022; 24:8260-8268. [PMID: 35319559 DOI: 10.1039/d2cp00431c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Derivatives of the widely used 1,6-diphenyl-1,3,5-hexatriene molecular probe have been considered using a multiscale approach involving spin-flip time-dependent density functional theory, classical molecular dynamics and hybrid quantum mechanics/molecular mechanics. We identify a potential probe of membrane phase (i.e. to preferentially detect liquid-ordered regions of lipid bilayers), which exhibits restricted access to a conical intersection in the liquid-ordered phase but is freely accessible in less ordered molecular environments. The characteristics of this probe also mark it as a candidate for an aggregation induced emission fluorophore.
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Affiliation(s)
- Max Winslow
- Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK.
| | - David Robinson
- Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK.
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9
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Abstract
In the following protocol, we describe the application of rapid fluorescence lifetime imaging to the measurement of membrane tension. The recent developments in tension sensing probes have resulted in probes which allow for quantification of membrane tension through measurement of fluorescence lifetime change with increasing or decreasing tension. In this protocol, we describe the acquisition and analysis steps required for these types of experiments and demonstrate how the fluorescence lifetime reports on change in membrane tension as a result of osmotic shock in live HeLa cells.
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Affiliation(s)
- Elvis Pandzic
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Renee Whan
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, Australia
| | - Alex Macmillan
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, Australia.
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10
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Kenney LJ. How Can a Histidine Kinase Respond to Mechanical Stress? Front Microbiol 2021; 12:655942. [PMID: 34335491 PMCID: PMC8320348 DOI: 10.3389/fmicb.2021.655942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 06/08/2021] [Indexed: 11/30/2022] Open
Abstract
Bacteria respond to physical forces perceived as mechanical stress as part of their comprehensive environmental sensing strategy. Histidine kinases can then funnel diverse environmental stimuli into changes in gene expression through a series of phosphorelay reactions. Because histidine kinases are most often embedded in the inner membrane, they can be sensitive to changes in membrane tension that occurs, for example, in response to osmotic stress, or when deformation of the cell body occurs upon encountering a surface before forming biofilms, or inside the host in response to shear stress in the kidney, intestine, lungs, or blood stream. A summary of our recent work that links the histidine kinase EnvZ to mechanical changes in the inner membrane is provided and placed in a context of other bacterial systems that respond to mechanical stress.
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Affiliation(s)
- Linda J Kenney
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, United States
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11
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Morillas-Becerril L, Franco-Ulloa S, Fortunati I, Marotta R, Sun X, Zanoni G, De Vivo M, Mancin F. Specific and nondisruptive interaction of guanidium-functionalized gold nanoparticles with neutral phospholipid bilayers. Commun Chem 2021; 4:93. [PMID: 36697571 PMCID: PMC9814519 DOI: 10.1038/s42004-021-00526-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 05/05/2021] [Indexed: 01/28/2023] Open
Abstract
Understanding and controlling the interaction between nanoparticles and biological entities is fundamental to the development of nanomedicine applications. In particular, the possibility to realize nanoparticles capable of directly targeting neutral lipid membranes would be advantageous to numerous applications aiming at delivering nanoparticles and their cargos into cells and biological vesicles. Here, we use experimental and computational methodologies to analyze the interaction between liposomes and gold nanoparticles (AuNPs) featuring cationic headgroups in their protecting monolayer. We find that in contrast to nanoparticles decorated with other positively charged headgroups, guanidinium-coated AuNPs can bind to neutral phosphatidylcholine liposomes, inducing nondisruptive membrane permeabilization. Atomistic molecular simulations reveal that this ability is due to the multivalent H-bonding interaction between the phosphate residues of the liposome's phospholipids and the guanidinium groups. Our results demonstrate that the peculiar properties of arginine magic, an effect responsible for the membranotropic properties of some naturally occurring peptides, are also displayed by guanidinium-bearing functionalized AuNPs.
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Affiliation(s)
- Lucía Morillas-Becerril
- grid.5608.b0000 0004 1757 3470Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, Padova, Italy
| | - Sebastian Franco-Ulloa
- grid.25786.3e0000 0004 1764 2907Laboratory of Molecular Modeling and Drug Discovery, Istituto Italiano di Tecnologia, Via Morego 30, Genoa, Italy ,Present Address: Expert Analytics. Møllergata 8, Oslo, Norway
| | - Ilaria Fortunati
- grid.5608.b0000 0004 1757 3470Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, Padova, Italy
| | - Roberto Marotta
- grid.25786.3e0000 0004 1764 2907Electron Microscopy Facility (EMF), Istituto Italiano di Tecnologia, Via Morego 30, Genoa, Italy
| | - Xiaohuan Sun
- grid.268415.cSchool of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu People’s Republic of China
| | - Giordano Zanoni
- grid.5608.b0000 0004 1757 3470Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, Padova, Italy
| | - Marco De Vivo
- grid.25786.3e0000 0004 1764 2907Laboratory of Molecular Modeling and Drug Discovery, Istituto Italiano di Tecnologia, Via Morego 30, Genoa, Italy
| | - Fabrizio Mancin
- grid.5608.b0000 0004 1757 3470Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, Padova, Italy
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12
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Mahecic D, Carlini L, Kleele T, Colom A, Goujon A, Matile S, Roux A, Manley S. Mitochondrial membrane tension governs fission. Cell Rep 2021; 35:108947. [PMID: 33852852 DOI: 10.1016/j.celrep.2021.108947] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 12/15/2020] [Accepted: 03/14/2021] [Indexed: 01/03/2023] Open
Abstract
During mitochondrial fission, key molecular and cellular factors assemble on the outer mitochondrial membrane, where they coordinate to generate constriction. Constriction sites can eventually divide or reverse upon disassembly of the machinery. However, a role for membrane tension in mitochondrial fission, although speculated, has remained undefined. We capture the dynamics of constricting mitochondria in mammalian cells using live-cell structured illumination microscopy (SIM). By analyzing the diameters of tubules that emerge from mitochondria and implementing a fluorescence lifetime-based mitochondrial membrane tension sensor, we discover that mitochondria are indeed under tension. Under perturbations that reduce mitochondrial tension, constrictions initiate at the same rate, but are less likely to divide. We propose a model based on our estimates of mitochondrial membrane tension and bending energy in living cells which accounts for the observed probability distribution for mitochondrial constrictions to divide.
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Affiliation(s)
- Dora Mahecic
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Route Cantonale, 1015 Lausanne, Switzerland; National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
| | - Lina Carlini
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Route Cantonale, 1015 Lausanne, Switzerland; National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
| | - Tatjana Kleele
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Route Cantonale, 1015 Lausanne, Switzerland; National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
| | - Adai Colom
- National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland; Department of Biochemistry, University of Geneva, 1211 Geneva, Switzerland; Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country, Leioa, Spain; Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Antoine Goujon
- National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland; Department of Organic Chemistry, University of Geneva, 1211 Geneva, Switzerland
| | - Stefan Matile
- National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland; Department of Organic Chemistry, University of Geneva, 1211 Geneva, Switzerland
| | - Aurélien Roux
- National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland; Department of Biochemistry, University of Geneva, 1211 Geneva, Switzerland
| | - Suliana Manley
- Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Route Cantonale, 1015 Lausanne, Switzerland; National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland.
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13
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López-Andarias J, Straková K, Martinent R, Jiménez-Rojo N, Riezman H, Sakai N, Matile S. Genetically Encoded Supramolecular Targeting of Fluorescent Membrane Tension Probes within Live Cells: Precisely Localized Controlled Release by External Chemical Stimulation. JACS AU 2021; 1:221-232. [PMID: 34467286 PMCID: PMC8395630 DOI: 10.1021/jacsau.0c00069] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Indexed: 05/12/2023]
Abstract
To image membrane tension in selected membranes of interest (MOI) inside living systems, the field of mechanobiology requires increasingly elaborated small-molecule chemical tools. We have recently introduced HaloFlipper, i.e., a mechanosensitive flipper probe that can localize in the MOI using HaloTag technology to report local membrane tension changes using fluorescence lifetime imaging microscopy. However, the linker tethering the probe to HaloTag hampers the lateral diffusion of the probe in all the lipid domains of the MOI. For a more global membrane tension measurement in any MOI, we present here a supramolecular chemistry strategy for selective localization and controlled release of flipper into the MOI, using a genetically encoded supramolecular tag. SupraFlippers, functionalized with a desthiobiotin ligand, can selectively accumulate in the organelle having expressed streptavidin. The addition of biotin as a biocompatible external stimulus with a higher affinity for Sav triggers the release of the probe, which spontaneously partitions into the MOI. Freed in the lumen of endoplasmic reticulum (ER), SupraFlippers report the membrane orders along the secretory pathway from the ER over the Golgi apparatus to the plasma membrane. Kinetics of the process are governed by both the probe release and the transport through lipid domains. The concentration of biotin can control the former, while the expression level of a transmembrane protein (Sec12) involved in the stimulation of the vesicular transport from ER to Golgi influences the latter. Finally, the generation of a cell-penetrating and fully functional Sav-flipper complex using cyclic oligochalcogenide (COC) transporters allows us to combine the SupraFlipper strategy and HaloTag technology.
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14
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Liu C, Gao X, Yuan J, Zhang R. Advances in the development of fluorescence probes for cell plasma membrane imaging. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116092] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Traeger H, Kiebala DJ, Weder C, Schrettl S. From Molecules to Polymers-Harnessing Inter- and Intramolecular Interactions to Create Mechanochromic Materials. Macromol Rapid Commun 2020; 42:e2000573. [PMID: 33191595 DOI: 10.1002/marc.202000573] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/16/2020] [Indexed: 12/30/2022]
Abstract
The development of mechanophores as building blocks that serve as predefined weak linkages has enabled the creation of mechanoresponsive and mechanochromic polymer materials, which are interesting for a range of applications including the study of biological specimens or advanced security features. In typical mechanophores, covalent bonds are broken when polymers that contain these chemical motifs are exposed to mechanical forces, and changes of the optical properties upon bond scission can be harnessed as a signal that enables the detection of applied mechanical stresses and strains. Similar chromic effects upon mechanical deformation of polymers can also be achieved without relying on the scission of covalent bonds. The dissociation of motifs that feature directional noncovalent interactions, the disruption of aggregated molecules, and conformational changes in molecules or polymers constitute an attractive element for the design of mechanoresponsive and mechanochromic materials. In this article, it is reviewed how such alterations of molecules and polymers can be exploited for the development of mechanochromic materials that signal deformation without breaking covalent bonds. Recent illustrative examples are highlighted that showcase how the use of such mechanoresponsive motifs enables the visual mapping of stresses and damage in a reversible and highly sensitive manner.
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Affiliation(s)
- Hanna Traeger
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Derek J Kiebala
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Stephen Schrettl
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
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16
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Kato T, Strakova K, García-Calvo J, Sakai N, Matile S. Mechanosensitive Fluorescent Probes, Changing Color Like Lobsters during Cooking: Cascade Switching Variations. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200157] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Takehiro Kato
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Karolina Strakova
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - José García-Calvo
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
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17
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Straková K, López-Andarias J, Jiménez-Rojo N, Chambers JE, Marciniak SJ, Riezman H, Sakai N, Matile S. HaloFlippers: A General Tool for the Fluorescence Imaging of Precisely Localized Membrane Tension Changes in Living Cells. ACS CENTRAL SCIENCE 2020; 6:1376-1385. [PMID: 32875078 PMCID: PMC7453570 DOI: 10.1021/acscentsci.0c00666] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Indexed: 05/03/2023]
Abstract
Tools to image membrane tension in response to mechanical stimuli are badly needed in mechanobiology. We have recently introduced mechanosensitive flipper probes to report quantitatively global membrane tension changes in fluorescence lifetime imaging microscopy (FLIM) images of living cells. However, to address specific questions on physical forces in biology, the probes need to be localized precisely in the membrane of interest (MOI). Herein we present a general strategy to image the tension of the MOI by tagging our newly introduced HaloFlippers to self-labeling HaloTags fused to proteins in this membrane. The critical challenge in the construction of operational HaloFlippers is the tether linking the flipper and the HaloTag: It must be neither too taut nor too loose, be hydrophilic but lipophilic enough to passively diffuse across membranes to reach the HaloTags, and allow partitioning of flippers into the MOI after the reaction. HaloFlippers with the best tether show localized and selective fluorescence after reacting with HaloTags that are close enough to the MOI but remain nonemissive if the MOI cannot be reached. Their fluorescence lifetime in FLIM images varies depending on the nature of the MOI and responds to myriocin-mediated sphingomyelin depletion as well as to osmotic stress. The response to changes in such precisely localized membrane tension follows the validated principles, thus confirming intact mechanosensitivity. Examples covered include HaloTags in the Golgi apparatus, peroxisomes, endolysosomes, and the ER, all thus becoming accessible to the selective fluorescence imaging of membrane tension.
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Affiliation(s)
- Karolína Straková
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
| | - Javier López-Andarias
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
- (J.L.-A.)
| | - Noemi Jiménez-Rojo
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
| | - Joseph E. Chambers
- Cambridge
Institute for Medical Research, University
of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Stefan J. Marciniak
- Cambridge
Institute for Medical Research, University
of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Howard Riezman
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
| | - Naomi Sakai
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
| | - Stefan Matile
- School
of Chemistry and Biochemistry and National Centre of Competence in
Research (NCCR) Chemical Biology, University
of Geneva, Geneva 1211, Switzerland
- (S.M.)
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18
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19
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Licari G, Strakova K, Matile S, Tajkhorshid E. Twisting and tilting of a mechanosensitive molecular probe detects order in membranes. Chem Sci 2020; 11:5637-5649. [PMID: 32864081 PMCID: PMC7433777 DOI: 10.1039/d0sc02175j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 04/29/2020] [Indexed: 12/29/2022] Open
Abstract
Lateral forces in biological membranes affect a variety of dynamic cellular processes. Recent synthetic efforts have introduced fluorescent "flippers" as environment-sensitive planarizable push-pull probes that can detect lipid packing and membrane tension, and respond to lipid-induced mechanical forces by a shift in their spectroscopic properties. Herein, we investigate the molecular origin of the mechanosensitivity of the best known flipper, Flipper-TR, by an extended set of molecular dynamics (MD) simulations in membranes of increasing complexity and under different physicochemical conditions, revealing unprecedented details of the sensing process. Simulations enabled by accurate refinement of Flipper-TR force field using quantum mechanical calculations allowed us to unambiguously correlate the planarization of the two fluorescent flippers to spectroscopic response. In particular, Flipper-TR conformation exhibits bimodal distribution in disordered membranes and a unimodal distribution in highly ordered membranes. Such dramatic change was associated with a shift in Flipper-TR excitation spectra, as supported both by our simulated and experimentally-measured spectra. Flipper-TR sensitivity to phase-transition is confirmed by a temperature-jump protocol that alters the lipid phase of an ordered membrane, triggering an instantaneous mechanical twisting of the probe. Simulations show that the probe is also sensitive to surface tension, since even in a naturally disordered membrane, the unimodal distribution of coplanar flippers can be achieved if a sufficiently negative surface tension is applied to the membrane. MD simulations in ternary mixtures containing raft-like nanodomains show that the probe can discriminate lipid domains in phase-separated complex bilayers. A histogram-based approach, called DOB-phase classification, is introduced that can differentiate regions of disordered and ordered lipid phases by comparing dihedral distributions of Flipper-TR. Moreover, a new sensing mechanism involving the orientation of Flipper-TR is elucidated, corroborating experimental evidence that the probe tilt angle is strongly dependent on lipid ordering. The obtained atomic-resolution description of Flipper-TR mechanosensitivity is key to the interpretation of experimental data and to the design of novel mechanosensors with improved spectroscopic properties.
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Affiliation(s)
- Giuseppe Licari
- NIH Center for Macromolecular Modeling and Bioinformatics , Beckman Institute for Advanced Science and Technology , Department of Biochemistry , Center for Biophysics and Quantitative Biology , University of Illinois at Urbana-Champaign , Urbana , Illinois , USA . ; Tel: +1-217-244-6914
| | - Karolina Strakova
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland
| | - Stefan Matile
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland
| | - Emad Tajkhorshid
- NIH Center for Macromolecular Modeling and Bioinformatics , Beckman Institute for Advanced Science and Technology , Department of Biochemistry , Center for Biophysics and Quantitative Biology , University of Illinois at Urbana-Champaign , Urbana , Illinois , USA . ; Tel: +1-217-244-6914
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20
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Palmitate and oleate modify membrane fluidity and kinase activities of INS-1E β-cells alongside altered metabolism-secretion coupling. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118619. [DOI: 10.1016/j.bbamcr.2019.118619] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 11/14/2019] [Accepted: 12/02/2019] [Indexed: 01/10/2023]
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21
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Coomer CA, Carlon-Andres I, Iliopoulou M, Dustin ML, Compeer EB, Compton AA, Padilla-Parra S. Single-cell glycolytic activity regulates membrane tension and HIV-1 fusion. PLoS Pathog 2020; 16:e1008359. [PMID: 32084246 PMCID: PMC7055913 DOI: 10.1371/journal.ppat.1008359] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 03/04/2020] [Accepted: 01/27/2020] [Indexed: 12/21/2022] Open
Abstract
There has been resurgence in determining the role of host metabolism in viral infection yet deciphering how the metabolic state of single cells affects viral entry and fusion remains unknown. Here, we have developed a novel assay multiplexing genetically-encoded biosensors with single virus tracking (SVT) to evaluate the influence of global metabolic processes on the success rate of virus entry in single cells. We found that cells with a lower ATP:ADP ratio prior to virus addition were less permissive to virus fusion and infection. These results indicated a relationship between host metabolic state and the likelihood for virus-cell fusion to occur. SVT revealed that HIV-1 virions were arrested at hemifusion in glycolytically-inactive cells. Interestingly, cells acutely treated with glycolysis inhibitor 2-deoxyglucose (2-DG) become resistant to virus infection and also display less surface membrane cholesterol. Addition of cholesterol in these in glycolytically-inactive cells rescued the virus entry block at hemifusion and enabled completion of HIV-1 fusion. Further investigation with FRET-based membrane tension and membrane order reporters revealed a link between host cell glycolytic activity and host membrane order and tension. Indeed, cells treated with 2-DG possessed lower plasma membrane lipid order and higher tension values, respectively. Our novel imaging approach that combines lifetime imaging (FLIM) and SVT revealed not only changes in plasma membrane tension at the point of viral fusion, but also that HIV is less likely to enter cells at areas of higher membrane tension. We therefore have identified a connection between host cell glycolytic activity and membrane tension that influences HIV-1 fusion in real-time at the single-virus fusion level in live cells.
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Affiliation(s)
- Charles A. Coomer
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- HIV Dynamics and Replication Program, National Cancer Institute, Frederick, Maryland, United States of America
- University of Kentucky, College of Medicine, Lexington, Kentucky, United States of America
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
| | - Irene Carlon-Andres
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
| | - Maro Iliopoulou
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Michael L. Dustin
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Ewoud B. Compeer
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Alex A. Compton
- HIV Dynamics and Replication Program, National Cancer Institute, Frederick, Maryland, United States of America
| | - Sergi Padilla-Parra
- Cellular Imaging Group, Wellcome Centre Human Genetics, University of Oxford, Oxford, United Kingdom
- Division of Structural Biology, Wellcome Centre Human Genetics, University of Oxford, United Kingdom
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22
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Zhang X, Sakai N, Matile S. Methyl Scanning for Mechanochemical Chalcogen-Bonding Cascade Switches. ChemistryOpen 2020; 9:18-22. [PMID: 31921541 PMCID: PMC6946998 DOI: 10.1002/open.201900288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Indexed: 12/14/2022] Open
Abstract
Chalcogen-bonding cascade switching was introduced recently to produce the chemistry tools needed to image physical forces in biological systems. In the original flipper probe, one methyl group appeared to possibly interfere with the cascade switch. In this report, this questionable methyl group is replaced by a hydrogen. The deletion of this methyl group in planarizable push-pull probes was not trivial because it required the synthesis of dithienothiophenes with four different substituents on the four available carbons. The mechanosensitivity of the resulting demethylated flipper probe was nearly identical to that of the original. Thus methyl groups in the switching region are irrelevant for function, whereas those in the twisting region are essential. This result supports the chalcogen-bonding cascade switching concept and, most importantly, removes significant synthetic demands from future probe development.
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Affiliation(s)
- Xiang Zhang
- Department of Organic ChemistryUniversity of GenevaGenevaSwitzerland
| | - Naomi Sakai
- Department of Organic ChemistryUniversity of GenevaGenevaSwitzerland
| | - Stefan Matile
- Department of Organic ChemistryUniversity of GenevaGenevaSwitzerland
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23
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Macchione M, Goujon A, Strakova K, Humeniuk HV, Licari G, Tajkhorshid E, Sakai N, Matile S. A Chalcogen-Bonding Cascade Switch for Planarizable Push-Pull Probes. Angew Chem Int Ed Engl 2019; 58:15752-15756. [PMID: 31539191 PMCID: PMC7035594 DOI: 10.1002/anie.201909741] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Indexed: 11/08/2022]
Abstract
Planarizable push-pull probes have been introduced to demonstrate physical forces in biology. However, the donors and acceptors needed to polarize mechanically planarized probes are incompatible with their twisted resting state. The objective of this study was to overcome this "flipper dilemma" with chalcogen-bonding cascade switches that turn on donors and acceptors only in response to mechanical planarization of the probe. This concept is explored by molecular dynamics simulations as well as chemical double-mutant cycle analysis. Cascade switched flipper probes turn out to excel with chemical stability, red shifts adding up to high significance, and focused mechanosensitivity. Most important, however, is the introduction of a new, general and fundamental concept that operates with non-trivial supramolecular chemistry, solves an important practical problem and opens a wide chemical space.
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Affiliation(s)
- Mariano Macchione
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Antoine Goujon
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Karolina Strakova
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Heorhii V Humeniuk
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Giuseppe Licari
- NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology and Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Emad Tajkhorshid
- NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology and Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
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24
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Strakova K, Poblador‐Bahamonde AI, Sakai N, Matile S. Fluorescent Flipper Probes: Comprehensive Twist Coverage. Chemistry 2019; 25:14935-14942. [DOI: 10.1002/chem.201903604] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/01/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Karolina Strakova
- Department of Organic ChemistryUniversity of Geneva Geneva Switzerland
| | | | - Naomi Sakai
- Department of Organic ChemistryUniversity of Geneva Geneva Switzerland
| | - Stefan Matile
- Department of Organic ChemistryUniversity of Geneva Geneva Switzerland
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25
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Macchione M, Goujon A, Strakova K, Humeniuk HV, Licari G, Tajkhorshid E, Sakai N, Matile S. A Chalcogen‐Bonding Cascade Switch for Planarizable Push–Pull Probes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909741] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mariano Macchione
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Antoine Goujon
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Karolina Strakova
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | | | - Giuseppe Licari
- NIH Center for Macromolecular Modeling and Bioinformatics Beckman Institute for Advanced Science and Technology and Department of Biochemistry University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Emad Tajkhorshid
- NIH Center for Macromolecular Modeling and Bioinformatics Beckman Institute for Advanced Science and Technology and Department of Biochemistry University of Illinois at Urbana-Champaign Urbana IL 61801 USA
| | - Naomi Sakai
- Department of Organic Chemistry University of Geneva Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry University of Geneva Geneva Switzerland
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26
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Strakova K, Assies L, Goujon A, Piazzolla F, Humeniuk HV, Matile S. Dithienothiophenes at Work: Access to Mechanosensitive Fluorescent Probes, Chalcogen-Bonding Catalysis, and Beyond. Chem Rev 2019; 119:10977-11005. [DOI: 10.1021/acs.chemrev.9b00279] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Karolina Strakova
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Lea Assies
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Antoine Goujon
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | | | | | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
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27
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Zeglio E, Rutz AL, Winkler TE, Malliaras GG, Herland A. Conjugated Polymers for Assessing and Controlling Biological Functions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806712. [PMID: 30861237 DOI: 10.1002/adma.201806712] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/15/2019] [Indexed: 05/20/2023]
Abstract
The field of organic bioelectronics is advancing rapidly in the development of materials and devices to precisely monitor and control biological signals. Electronics and biology can interact on multiple levels: organs, complex tissues, cells, cell membranes, proteins, and even small molecules. Compared to traditional electronic materials such as metals and inorganic semiconductors, conjugated polymers (CPs) have several key advantages for biological interactions: tunable physiochemical properties, adjustable form factors, and mixed conductivity (ionic and electronic). Herein, the use of CPs in five biologically oriented research topics, electrophysiology, tissue engineering, drug release, biosensing, and molecular bioelectronics, is discussed. In electrophysiology, implantable devices with CP coating or CP-only electrodes are showing improvements in signal performance and tissue interfaces. CP-based scaffolds supply highly favorable static or even dynamic interfaces for tissue engineering. CPs also enable delivery of drugs through a variety of mechanisms and form factors. For biosensing, CPs offer new possibilities to incorporate biological sensing elements in a conducting matrix. Molecular bioelectronics is today used to incorporate (opto)electronic functions in living tissue. Under each topic, the limits of the utility of CPs are discussed and, overall, the major challenges toward implementation of CPs and their devices to real-world applications are highlighted.
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Affiliation(s)
- Erica Zeglio
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Alexandra L Rutz
- Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Ave., Cambridge, CB3 0FA, UK
| | - Thomas E Winkler
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - George G Malliaras
- Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Ave., Cambridge, CB3 0FA, UK
| | - Anna Herland
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institute, 17177, Stockholm, Sweden
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28
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Goujon A, Colom A, Straková K, Mercier V, Mahecic D, Manley S, Sakai N, Roux A, Matile S. Mechanosensitive Fluorescent Probes to Image Membrane Tension in Mitochondria, Endoplasmic Reticulum, and Lysosomes. J Am Chem Soc 2019; 141:3380-3384. [PMID: 30744381 DOI: 10.1021/jacs.8b13189] [Citation(s) in RCA: 138] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Measuring forces inside cells is particularly challenging. With the development of quantitative microscopy, fluorophores which allow the measurement of forces became highly desirable. We have previously introduced a mechanosensitive flipper probe, which responds to the change of plasma membrane tension by changing its fluorescence lifetime and thus allows tension imaging by FLIM. Herein, we describe the design, synthesis, and evaluation of flipper probes that selectively label intracellular organelles, i.e., lysosomes, mitochondria, and the endoplasmic reticulum. The probes respond uniformly to osmotic shocks applied extracellularly, thus confirming sensitivity toward changes in membrane tension. At rest, different lifetimes found for different organelles relate to known differences in membrane organization rather than membrane tension and allow colabeling in the same cells. At the organelle scale, lifetime heterogeneity provides unprecedented insights on ER tubules and sheets, and nuclear membranes. Examples on endosomal trafficking or increase of tension at mitochondrial constriction sites outline the potential of intracellularly targeted fluorescent tension probes to address essential questions that were previously beyond reach.
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Affiliation(s)
- Antoine Goujon
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | - Adai Colom
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | - Karolína Straková
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | - Vincent Mercier
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | | | | | - Naomi Sakai
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | - Aurélien Roux
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
| | - Stefan Matile
- School of Chemistry and Biochemistry and ‡National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , CH-1211 Geneva , Switzerland
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29
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Goujon A, Straková K, Sakai N, Matile S. Streptavidin interfacing as a general strategy to localize fluorescent membrane tension probes in cells. Chem Sci 2019; 10:310-319. [PMID: 30713639 PMCID: PMC6333237 DOI: 10.1039/c8sc03620a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/09/2018] [Indexed: 12/12/2022] Open
Abstract
To image the mechanical properties of biological membranes, twisted push-pull mechanophores that respond to membrane tension by planarization in the ground state have been introduced recently. For their application in biological systems, these so-called fluorescent flippers will have to be localized to specific environments of cellular membranes. In this report, we explore streptavidin as a versatile connector between biotinylated flipper probes and biotinylated targets. Fluorescence spectroscopy and microscopy with LUVs and GUVs reveal the specific conditions needed for desthiobiotin-loaded streptavidin to deliver biotinylated flippers selectively to biotinylated membranes. Selectivity for biotinylated plasma membranes is also observed in HeLa cells, confirming the compatibility of this strategy with biological systems. Streptavidin interfacing does not affect the mechanosensitivity of the flipper probes, red shift in the excitation maximum and fluorescence lifetime increase with membrane order and tension, as demonstrated, inter alia, using FLIM.
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Affiliation(s)
- Antoine Goujon
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/
| | - Karolína Straková
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/
| | - Naomi Sakai
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/
| | - Stefan Matile
- School of Chemistry and Biochemistry , National Centre of Competence in Research (NCCR) Chemical Biology , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/
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30
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Colom A, Derivery E, Soleimanpour S, Tomba C, Molin MD, Sakai N, González-Gaitán M, Matile S, Roux A. A fluorescent membrane tension probe. Nat Chem 2018; 10:1118-1125. [PMID: 30150727 PMCID: PMC6197433 DOI: 10.1038/s41557-018-0127-3] [Citation(s) in RCA: 288] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 07/25/2018] [Indexed: 12/24/2022]
Abstract
Cells and organelles are delimited by lipid bilayers in which high deformability is essential to many cell processes, including motility, endocytosis and cell division. Membrane tension is therefore a major regulator of the cell processes that remodel membranes, albeit one that is very hard to measure in vivo. Here we show that a planarizable push-pull fluorescent probe called FliptR (fluorescent lipid tension reporter) can monitor changes in membrane tension by changing its fluorescence lifetime as a function of the twist between its fluorescent groups. The fluorescence lifetime depends linearly on membrane tension within cells, enabling an easy quantification of membrane tension by fluorescence lifetime imaging microscopy. We further show, using model membranes, that this linear dependency between lifetime of the probe and membrane tension relies on a membrane-tension-dependent lipid phase separation. We also provide calibration curves that enable accurate measurement of membrane tension using fluorescence lifetime imaging microscopy.
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Affiliation(s)
- Adai Colom
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Emmanuel Derivery
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
| | - Saeideh Soleimanpour
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Caterina Tomba
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Marta Dal Molin
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Naomi Sakai
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Marcos González-Gaitán
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, Geneva, Switzerland.
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland.
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland.
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31
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Decrease in plasma membrane tension triggers PtdIns(4,5)P 2 phase separation to inactivate TORC2. Nat Cell Biol 2018; 20:1043-1051. [PMID: 30154550 PMCID: PMC6237274 DOI: 10.1038/s41556-018-0150-z] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 06/21/2018] [Indexed: 02/06/2023]
Abstract
The target of rapamycin complex 2 (TORC2) plays a key role in maintaining the homeostasis of plasma membrane (PM) tension. TORC2 activation following increased PM tension involves redistribution of the Slm1 and 2 paralogues from PM invaginations known as eisosomes into membrane compartments containing TORC2. How Slm1/2 relocalization is triggered, and if/how this plays a role in TORC2 inactivation with decreased PM tension, is unknown. Using osmotic shocks and palmitoylcarnitine as orthogonal tools to manipulate PM tension, we demonstrate that decreased PM tension triggers spontaneous, energy-independent reorganization of pre-existing phosphatidylinositol-4,5-bisphosphate into discrete invaginated membrane domains, which cluster and inactivate TORC2. These results demonstrate that increased and decreased membrane tension are sensed through different mechanisms, highlighting a role for membrane lipid phase separation in mechanotransduction.
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32
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Strakova K, Soleimanpour S, Diez-Castellnou M, Sakai N, Matile S. Ganglioside-Selective Mechanosensitive Fluorescent Membrane Probes. Helv Chim Acta 2018. [DOI: 10.1002/hlca.201800019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Karolina Strakova
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Saeideh Soleimanpour
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Marta Diez-Castellnou
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Stefan Matile
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
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33
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Macchione M, Tsemperouli M, Goujon A, Mallia AR, Sakai N, Sugihara K, Matile S. Mechanosensitive Oligodithienothiophenes: Transmembrane Anion Transport Along Chalcogen-Bonding Cascades. Helv Chim Acta 2018. [DOI: 10.1002/hlca.201800014] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mariano Macchione
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Maria Tsemperouli
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Antoine Goujon
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Ajith R. Mallia
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Naomi Sakai
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Kaori Sugihara
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Stefan Matile
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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34
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Tasior M, Czichy M, Łapkowski M, Gryko DT. Dibenzothienopyrrolo[3,2-b]pyrrole: The Missing Member of the Thienoacene Family. Chem Asian J 2018; 13:449-456. [PMID: 29272075 DOI: 10.1002/asia.201701639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/18/2017] [Indexed: 12/16/2022]
Abstract
Dibenzothienopyrrolo[3,2-b]pyrrole and the corresponding bis(S,S-dioxide) were synthesized by using a concise synthetic strategy. Despite the presence of six fused aromatic rings, π-expanded pyrrolo[3,2-b]pyrroles of this type absorb and emit at relatively short wavelengths, which reflects inefficient π conjugation due to the angular arrangement of the aromatic rings. They exhibit interesting and complex electrochemical behavior, which highlights their potential in organic electronics. Both heteroacenes undergo two-stage oxidation while retaining the independence of each 1-phenyl-1H-[1]benzothieno[3,2-b]pyrrole, which was proved by in situ electron spin resonance measurements. Interestingly, electrochemically generated dicationdiradicals are not only distributed over the pyrrolo[3,2-b]pyrrole scaffold, but also over the phenyl substituents located on nitrogen atoms.
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Affiliation(s)
- Mariusz Tasior
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Małgorzata Czichy
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100, Gliwice, Poland
| | - Mieczysław Łapkowski
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100, Gliwice, Poland.,Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Curie-Sklodowskiej 34, 41-819, Zabrze, Poland
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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35
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Licari G, Beckwith JS, Soleimanpour S, Matile S, Vauthey E. Detecting order and lateral pressure at biomimetic interfaces using a mechanosensitive second-harmonic-generation probe. Phys Chem Chem Phys 2018; 20:9328-9336. [DOI: 10.1039/c8cp00773j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A mechanosensitive harmonophore is used to probe the order and lateral pressure in phospholipid monolayers by surface-second harmonic generation.
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Affiliation(s)
- Giuseppe Licari
- Department of Physical Chemistry, University of Geneva
- CH-1211 Geneva 4
- Switzerland
| | - Joseph S. Beckwith
- Department of Physical Chemistry, University of Geneva
- CH-1211 Geneva 4
- Switzerland
| | - Saeideh Soleimanpour
- Department of Organic Chemistry, University of Geneva
- CH-1211 Geneva 4
- Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva
- CH-1211 Geneva 4
- Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva
- CH-1211 Geneva 4
- Switzerland
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36
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Shaya J, Collot M, Bénailly F, Mahmoud N, Mély Y, Michel BY, Klymchenko AS, Burger A. Turn-on Fluorene Push-Pull Probes with High Brightness and Photostability for Visualizing Lipid Order in Biomembranes. ACS Chem Biol 2017; 12:3022-3030. [PMID: 29053920 DOI: 10.1021/acschembio.7b00658] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The rational design of environmentally sensitive dyes with superior properties is critical for elucidating the fundamental biological processes and understanding the biophysical behavior of cell membranes. In this study, a novel group of fluorene-based push-pull probes was developed for imaging membrane lipids. The design of these fluorogenic conjugates is based on a propioloyl linker to preserve the required spectroscopic features of the core dye. This versatile linker allowed the introduction of a polar deoxyribosyl head, a lipophilic chain, and an amphiphilic/anchoring group to tune the cell membrane binding and internalization. It was found that the deoxyribosyl head favored cell internalization and staining of intracellular membranes, whereas an amphiphilic anchor group ensured specific plasma membrane staining. The optimized fluorene probes presented a set of improvements as compared to commonly used environmentally sensitive membrane probe Laurdan such as red-shifted absorption matching the 405 nm diode laser excitation, a blue-green emission range complementary to the red fluorescent proteins, enhanced brightness and photostability, as well as preserved sensitivity to lipid order, as shown in model membranes and living cells.
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Affiliation(s)
- Janah Shaya
- Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 − Parc Valrose, 06108 Nice cedex 2, France
| | - Mayeul Collot
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213, Faculté de Pharmacie, Université de Strasbourg, CNRS, 74 Route du Rhin, 67401 Illkirch, France
| | - Frédéric Bénailly
- Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 − Parc Valrose, 06108 Nice cedex 2, France
| | - Najiba Mahmoud
- Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 − Parc Valrose, 06108 Nice cedex 2, France
| | - Yves Mély
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213, Faculté de Pharmacie, Université de Strasbourg, CNRS, 74 Route du Rhin, 67401 Illkirch, France
| | - Benoît Y. Michel
- Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 − Parc Valrose, 06108 Nice cedex 2, France
| | - Andrey S. Klymchenko
- Laboratoire
de Biophotonique et Pharmacologie, UMR 7213, Faculté de Pharmacie, Université de Strasbourg, CNRS, 74 Route du Rhin, 67401 Illkirch, France
| | - Alain Burger
- Université Côte d’Azur, CNRS, Institut de Chimie de Nice, UMR 7272 − Parc Valrose, 06108 Nice cedex 2, France
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37
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Macchione M, Chuard N, Sakai N, Matile S. Planarizable Push-Pull Probes: Overtwisted Flipper Mechanophores. Chempluschem 2017; 82:1062-1066. [PMID: 31961614 DOI: 10.1002/cplu.201600634] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/04/2017] [Indexed: 01/03/2023]
Abstract
Planarizable push-pull fluorescent probes, also referred to as flipper probes, have been introduced as conceptually innovative mechanophores that report on forces in their local environment in lipid bilayer membranes. The best flipper probes respond to a change from liquid disordered to solid ordered membranes with a red shift in excitation of 50-90 nm. A simultaneous increase in fluorescence lifetime and negligible background fluorescence from the aqueous phase qualifies these fluorescent probes for meaningful imaging in live cells. Here, we report that the replacement of methyl with isobutyl substituents along the scaffold of a dithienothiophene dimer strongly reduces fluorescence intensity but increases solvatochromism slightly. These trends imply that the large substituents in "leucine flippers" hinder the planarization in the first excited state to result in twisted intramolecular charge transfer (TICT). As a result of this overtwisting, the leucine flippers form interesting fluorescent micelles in water but fail to respond to changes in membrane order. These dramatic changes in function provide one of the most impressive illustrations for the hypersensitivity of fluorescent membrane probes toward small changes in their structure.
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Affiliation(s)
- Mariano Macchione
- Department of Organic Chemistry, University of Geneva, CH-1211, Geneva, Switzerland
| | - Nicolas Chuard
- Department of Organic Chemistry, University of Geneva, CH-1211, Geneva, Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva, CH-1211, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, CH-1211, Geneva, Switzerland
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38
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Neuhaus F, Zobi F, Brezesinski G, Dal Molin M, Matile S, Zumbuehl A. Correlation of surface pressure and hue of planarizable push-pull chromophores at the air/water interface. Beilstein J Org Chem 2017; 13:1099-1105. [PMID: 28684989 PMCID: PMC5480347 DOI: 10.3762/bjoc.13.109] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 05/13/2017] [Indexed: 12/17/2022] Open
Abstract
It is currently not possible to directly measure the lateral pressure of a biomembrane. Mechanoresponsive fluorescent probes are an elegant solution to this problem but it requires first the establishment of a direct correlation between the membrane surface pressure and the induced color change of the probe. Here, we analyze planarizable dithienothiophene push-pull probes in a monolayer at the air/water interface using fluorescence microscopy, grazing-incidence angle X-ray diffraction, and infrared reflection-absorption spectroscopy. An increase of the lateral membrane pressure leads to a well-packed layer of the 'flipper' mechanophores and a clear change in hue above 18 mN/m. The fluorescent probes had no influence on the measured isotherm of the natural phospholipid DPPC suggesting that the flippers probe the lateral membrane pressure without physically changing it. This makes the flipper probes a truly useful addition to the membrane probe toolbox.
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Affiliation(s)
- Frederik Neuhaus
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology, Geneva, Switzerland
| | - Fabio Zobi
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, 14476 Potsdam, Germany
| | - Marta Dal Molin
- National Centre of Competence in Research (NCCR) Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- National Centre of Competence in Research (NCCR) Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Andreas Zumbuehl
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology, Geneva, Switzerland
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39
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Verolet Q, Dal Molin M, Colom A, Roux A, Guénée L, Sakai N, Matile S. Twisted Push-Pull Probes with Turn-On Sulfide Donors. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201600328] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Quentin Verolet
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Marta Dal Molin
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Adai Colom
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Aurélien Roux
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Laure Guénée
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Naomi Sakai
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
| | - Stefan Matile
- School of Chemistry and Biochemistry; National Centre of Competence in Research (NCCR) Chemical Biology; University of Geneva; Quai Ernest Ansermet 30 CH-1211 Geneva 4, Switzerland
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