1
|
Jiao M, Danthi P, Yu Y. Cholesterol-Dependent Membrane Deformation by Metastable Viral Capsids Facilitates Entry. ACS Infect Dis 2024; 10:2728-2740. [PMID: 38873897 DOI: 10.1021/acsinfecdis.4c00085] [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] [Indexed: 06/15/2024]
Abstract
Nonenveloped viruses employ unique entry mechanisms to breach and infect host cells. Understanding these mechanisms is crucial for developing antiviral strategies. Prevailing perspective suggests that nonenveloped viruses release membrane pore-forming peptides to breach host membranes. However, the precise involvement of the viral capsid in this entry remains elusive. Our study presents direct observations elucidating the dynamically distinctive steps through which metastable reovirus capsids disrupt host lipid membranes as they uncoat into partially hydrophobic intermediate particles. Using both live cells and model membrane systems, our key finding is that reovirus capsids actively deform and permeabilize lipid membranes in a cholesterol-dependent process. Unlike membrane pore-forming peptides, these metastable viral capsids induce more extensive membrane perturbations, including budding, bridging between adjacent membranes, and complete rupture. Notably, cholesterol enhances subviral particle adsorption, resulting in the formation of pores equivalent to the capsid size. This cholesterol dependence is attributed to the lipid condensing effect, particularly prominent at an intermediate cholesterol level. Furthermore, our results reveal a positive correlation between membrane disruption extent and efficiency of viral variants in establishing infection. This study unveils the crucial role of capsid-lipid interaction in nonenveloped virus entry, providing new insights into how cholesterol homeostasis influences virus infection dynamics.
Collapse
Affiliation(s)
- Mengchi Jiao
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
| | - Pranav Danthi
- Department of Biology, Indiana University, Bloomington, Indiana 47405-7102, United States
| | - Yan Yu
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405-7102, United States
| |
Collapse
|
2
|
Jiao M, Danthi P, Yu Y. Cholesterol-Dependent Membrane Deformation by Metastable Viral Capsids Facilitates Entry. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.10.575085. [PMID: 38260524 PMCID: PMC10802578 DOI: 10.1101/2024.01.10.575085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Non-enveloped viruses employ unique entry mechanisms to breach and infect host cells. Understanding these mechanisms is crucial for developing antiviral strategies. Prevailing perspective suggests that non-enveloped viruses release membrane lytic peptides to breach host membranes. However, the precise involvement of the viral capsid in this entry remains elusive. Our study presents direct observations elucidating the dynamically distinctive steps through which metastable reovirus capsids disrupt host lipid membranes as they uncoat into partially hydrophobic intermediate particles. Using both live cells and model membrane systems, our key finding is that reovirus capsids actively deform and permeabilize lipid membranes in a cholesterol-dependent process. Unlike membrane lytic peptides, these metastable viral capsids induce more extensive membrane perturbations, including budding, bridging between adjacent membranes, and complete rupture. Notably, cholesterol enhances subviral particle adsorption, resulting in the formation of pores equivalent to the capsid size. This cholesterol dependence is attributed to the lipid condensing effect, particularly prominent at intermediate cholesterol level. Furthermore, our results reveal a positive correlation between membrane disruption extent and efficiency of viral variants in establishing infection. This study unveils the crucial role of capsid-lipid interaction in non-enveloped virus entry, providing new insights into how cholesterol homeostasis influences virus infection dynamics.
Collapse
Affiliation(s)
- Mengchi Jiao
- Department of Chemistry, Indiana University, Bloomington, IN 47405-7102
| | - Pranav Danthi
- Department of Biology, Indiana University, Bloomington, IN 47405-7102
| | - Yan Yu
- Department of Chemistry, Indiana University, Bloomington, IN 47405-7102
| |
Collapse
|
3
|
Montalbo RCK, Tu HL. Micropatterning of functional lipid bilayer assays for quantitative bioanalysis. BIOMICROFLUIDICS 2023; 17:031302. [PMID: 37179590 PMCID: PMC10171888 DOI: 10.1063/5.0145997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Interactions of the cell with its environment are mediated by the cell membrane and membrane-localized molecules. Supported lipid bilayers have enabled the recapitulation of the basic properties of cell membranes and have been broadly used to further our understanding of cellular behavior. Coupled with micropatterning techniques, lipid bilayer platforms have allowed for high throughput assays capable of performing quantitative analysis at a high spatiotemporal resolution. Here, an overview of the current methods of the lipid membrane patterning is presented. The fabrication and pattern characteristics are briefly described to present an idea of the quality and notable features of the methods, their utilizations for quantitative bioanalysis, as well as to highlight possible directions for the advanced micropatterning lipid membrane assays.
Collapse
|
4
|
Wang CM, Chan HS, Liao CL, Chang CW, Liao WS. Gap-directed chemical lift-off lithographic nanoarchitectonics for arbitrary sub-micrometer patterning. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:34-44. [PMID: 36703907 PMCID: PMC9830500 DOI: 10.3762/bjnano.14.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 12/28/2022] [Indexed: 05/09/2023]
Abstract
We introduce a unique soft lithographic operation that exploits stamp roof collapse-induced gaps to selectively remove an alkanethiol self-assembled monolayer (SAM) on Au to generate surface patterns that are orders of magnitude smaller than structures on the original elastomer stamp. The smallest achieved feature dimension is 5 nm using a micrometer-scale structured stamp in a chemical lift-off lithography (CLL) process. Molecular patterns retained in the gaps between stamp features and their circumscribed or inscribed circles follow mathematical predictions, and their sizes can be tuned by altering the stamp structure dimensions, including height, pitch, and shape. These generated surface molecular patterns can function as biorecognition arrays or be transferred to the underneath Au layer for metallic structure creation. By combining CLL process with this gap phenomenon, soft material properties that are previously thought as demerits can be used to achieve sub-10 nm features in a straightforward sketch.
Collapse
Affiliation(s)
- Chang-Ming Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Hong-Sheng Chan
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Chia-Li Liao
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Che-Wei Chang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Ssu Liao
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
5
|
Armanious A, Gerelli Y, Micciulla S, Pace HP, Welbourn RJL, Sjöberg M, Agnarsson B, Höök F. Probing the Separation Distance between Biological Nanoparticles and Cell Membrane Mimics Using Neutron Reflectometry with Sub-Nanometer Accuracy. J Am Chem Soc 2022; 144:20726-20738. [DOI: 10.1021/jacs.2c08456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Antonius Armanious
- Department of Physics, Chalmers University of Technology, 41296Gothenburg, Sweden
| | - Yuri Gerelli
- Institut Max von Laue-Paul Langevin (ILL), 38042Grenoble, France
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, 60131Ancona, Italy
| | | | - Hudson P. Pace
- Department of Physics, Chalmers University of Technology, 41296Gothenburg, Sweden
| | - Rebecca J. L. Welbourn
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, OxonOX11 0QX, United Kingdom
| | - Mattias Sjöberg
- Department of Physics, Chalmers University of Technology, 41296Gothenburg, Sweden
| | - Björn Agnarsson
- Department of Physics, Chalmers University of Technology, 41296Gothenburg, Sweden
| | - Fredrik Höök
- Department of Physics, Chalmers University of Technology, 41296Gothenburg, Sweden
| |
Collapse
|
6
|
Pospíšil J, Hrabovský M, Bohačiaková D, Hovádková Z, Jurásek M, Mlčoušková J, Paruch K, Nevolová Š, Damborsky J, Hampl A, Jaros J. Geometric Control of Cell Behavior by Biomolecule Nanodistribution. ACS Biomater Sci Eng 2022; 8:4789-4806. [PMID: 36202388 PMCID: PMC9667466 DOI: 10.1021/acsbiomaterials.2c00650] [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] [Indexed: 11/30/2022]
Abstract
![]()
Many dynamic interactions within the cell microenvironment
modulate
cell behavior and cell fate. However, the pathways and mechanisms
behind cell–cell or cell–extracellular matrix interactions
remain understudied, as they occur at a nanoscale level. Recent progress
in nanotechnology allows for mimicking of the microenvironment at
nanoscale in vitro; electron-beam lithography (EBL)
is currently the most promising technique. Although this nanopatterning
technique can generate nanostructures of good quality and resolution,
it has resulted, thus far, in the production of only simple shapes
(e.g., rectangles) over a relatively small area (100 × 100 μm),
leaving its potential in biological applications unfulfilled. Here,
we used EBL for cell-interaction studies by coating cell-culture-relevant
material with electron-conductive indium tin oxide, which formed nanopatterns
of complex nanohexagonal structures over a large area (500 ×
500 μm). We confirmed the potential of EBL for use in cell-interaction
studies by analyzing specific cell responses toward differentially
distributed nanohexagons spaced at 1000, 500, and 250 nm. We found
that our optimized technique of EBL with HaloTags enabled the investigation
of broad changes to a cell-culture-relevant surface and can provide
an understanding of cellular signaling mechanisms at a single-molecule
level.
Collapse
Affiliation(s)
- Jakub Pospíšil
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic.,Core Facility Cellular Imaging, CEITEC, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Miloš Hrabovský
- TESCAN Orsay Holding a.s., Libušina tř. 863, Brno 623 00, Czech Republic
| | - Dáša Bohačiaková
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic.,International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic
| | | | | | - Jarmila Mlčoušková
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Kamil Paruch
- International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic.,Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Šárka Nevolová
- International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic.,Loschmidt Laboratories, Department of Experimental Biology and Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Jiri Damborsky
- International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic.,Loschmidt Laboratories, Department of Experimental Biology and Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, Brno 625 00, Czech Republic
| | - Aleš Hampl
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic.,International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic
| | - Josef Jaros
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic.,International Clinical Research Center (ICRC), St. Anne's University Hospital, Pekařská 53, Brno 656 91, Czech Republic
| |
Collapse
|
7
|
Humenik M, Winkler A, Scheibel T. Patterning of protein-based materials. Biopolymers 2020; 112:e23412. [PMID: 33283876 DOI: 10.1002/bip.23412] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 01/03/2023]
Abstract
Micro- and nanopatterning of proteins on surfaces allows to develop for example high-throughput biosensors in biomedical diagnostics and in general advances the understanding of cell-material interactions in tissue engineering. Today, many techniques are available to generate protein pattern, ranging from technically simple ones, such as micro-contact printing, to highly tunable optical lithography or even technically sophisticated scanning probe lithography. Here, one focus is on the progress made in the development of protein-based materials as positive or negative photoresists allowing micro- to nanostructured scaffolds for biocompatible photonic, electronic and tissue engineering applications. The second one is on approaches, which allow a controlled spatiotemporal positioning of a single protein on surfaces, enabled by the recent developments in immobilization techniques coherent with the sensitive nature of proteins, defined protein orientation and maintenance of the protein activity at interfaces. The third one is on progress in photolithography-based methods, which allow to control the formation of protein-repellant/adhesive polymer brushes.
Collapse
Affiliation(s)
- Martin Humenik
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Bayreuth, Germany
| | - Anika Winkler
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Bayreuth, Germany
| | - Thomas Scheibel
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Bayreuth, Germany.,Bayreuth Center for Colloids and Interfaces (BZKG), Universität Bayreuth, Bayreuth, Germany.,Bayreuth Center for Molecular Biosciences (BZMB), Universität Bayreuth, Bayreuth, Germany.,Bayreuth Center for Material Science (BayMAT), Universität Bayreuth, Bayreuth, Germany.,Bavarian Polymer Institute (BPI), Universität Bayreuth, Bayreuth, Germany
| |
Collapse
|
8
|
Antibody Printing Technologies. Methods Mol Biol 2020. [PMID: 33237416 DOI: 10.1007/978-1-0716-1064-0_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Antibody microarrays are routinely employed in the lab and in the clinic for studying protein expression, protein-protein, and protein-drug interactions. The microarray format reduces the size scale at which biological and biochemical interactions occur, leading to large reductions in reagent consumption and handling times while increasing overall experimental throughput. Specifically, antibody microarrays, as a platform, offer a number of different advantages over traditional techniques in the areas of drug discovery and diagnostics. While a number of different techniques and approaches have been developed for creating micro and nanoscale antibody arrays, issues relating to sensitivity, cost, and reproducibility persist. The aim of this review is to highlight current state-of the-art techniques and approaches for creating antibody arrays by providing latest accounts of the field while discussing potential future directions.
Collapse
|
9
|
Liu G, Petrosko SH, Zheng Z, Mirkin CA. Evolution of Dip-Pen Nanolithography (DPN): From Molecular Patterning to Materials Discovery. Chem Rev 2020; 120:6009-6047. [DOI: 10.1021/acs.chemrev.9b00725] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Guoqiang Liu
- Laboratory for Advanced Interfacial Materials and Devices, Research Centre for Smart Wearable Technology, Institute of Textile and Clothing, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Sarah Hurst Petrosko
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Zijian Zheng
- Laboratory for Advanced Interfacial Materials and Devices, Research Centre for Smart Wearable Technology, Institute of Textile and Clothing, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Chad A. Mirkin
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
10
|
Liu X, Kumar M, Calo A, Albisetti E, Zheng X, Manning KB, Elacqua E, Weck M, Ulijn RV, Riedo E. Sub-10 nm Resolution Patterning of Pockets for Enzyme Immobilization with Independent Density and Quasi-3D Topography Control. ACS APPLIED MATERIALS & INTERFACES 2019; 11:41780-41790. [PMID: 31609566 DOI: 10.1021/acsami.9b11844] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The ability to precisely control the localization of enzymes on a surface is critical for several applications including biosensing, bionanoreactors, and single molecule studies. Despite recent advances, fabrication of enzyme patterns with resolution at the single enzyme level is limited by the lack of lithography methods that combine high resolution, compatibility with soft, polymeric structures, ease of fabrication, and high throughput. Here, a method to generate enzyme nanopatterns (using thermolysin as a model system) on a polymer surface is demonstrated using thermochemical scanning probe lithography (tc-SPL). Electrostatic immobilization of negatively charged sulfonated enzymes occurs selectively at positively charged amine nanopatterns produced by thermal deprotection of amines along the side-chain of a methacrylate-based copolymer film via tc-SPL. This process occurs simultaneously with local thermal quasi-3D topographical patterning of the same polymer, offering lateral sub-10 nm resolution, and vertical 1 nm resolution, as well as high throughput (5.2 × 104 μm2/h). The obtained single-enzyme resolution patterns are characterized by atomic force microscopy (AFM) and fluorescence microscopy. The enzyme density, the surface passivation, and the quasi-3D arbitrary geometry of these patterned pockets are directly controlled during the tc-SPL process in a single step without the need of markers or masks. Other unique features of this patterning approach include the combined single-enzyme resolution over mm2 areas and the possibility of fabricating enzymes nanogradients.
Collapse
Affiliation(s)
- Xiangyu Liu
- Tandon School of Engineering , New York University , Brooklyn , New York 11201 , United States
| | - Mohit Kumar
- Advanced Science Research Center (ASRC) , CUNY Graduate Center , New York , New York 10031 , United States
| | - Annalisa Calo
- Tandon School of Engineering , New York University , Brooklyn , New York 11201 , United States
| | - Edoardo Albisetti
- Tandon School of Engineering , New York University , Brooklyn , New York 11201 , United States
- Dipartimento di Fisica , Politecnico di Milano , Milano , 20133 , Italy
| | - Xiaorui Zheng
- Tandon School of Engineering , New York University , Brooklyn , New York 11201 , United States
| | - Kylie B Manning
- Department of Chemistry , New York University , New York , New York 10003 , United States
| | - Elizabeth Elacqua
- Department of Chemistry , New York University , New York , New York 10003 , United States
- Department of Chemistry , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
| | - Marcus Weck
- Department of Chemistry , New York University , New York , New York 10003 , United States
| | - Rein V Ulijn
- Advanced Science Research Center (ASRC) , CUNY Graduate Center , New York , New York 10031 , United States
| | - Elisa Riedo
- Tandon School of Engineering , New York University , Brooklyn , New York 11201 , United States
| |
Collapse
|
11
|
Cyclodextrin-functionalized asymmetric block copolymer films as high-capacity reservoir for drug delivery. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.04.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
12
|
Liu G, Hirtz M, Fuchs H, Zheng Z. Development of Dip-Pen Nanolithography (DPN) and Its Derivatives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900564. [PMID: 30977978 DOI: 10.1002/smll.201900564] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/08/2019] [Indexed: 05/13/2023]
Abstract
Dip-pen nanolithography (DPN) is a unique nanofabrication tool that can directly write a variety of molecular patterns on a surface with high resolution and excellent registration. Over the past 20 years, DPN has experienced a tremendous evolution in terms of applicable inks, a remarkable improvement in fabrication throughput, and the development of various derivative technologies. Among these developments, polymer pen lithography (PPL) is the most prominent one that provides a large-scale, high-throughput, low-cost tool for nanofabrication, which significantly extends DPN and beyond. These developments not only expand the scope of the wide field of scanning probe lithography, but also enable DPN and PPL as general approaches for the fabrication or study of nanostructures and nanomaterials. In this review, a focused summary and historical perspective of the technological development of DPN and its derivatives, with a focus on PPL, in one timeline, are provided and future opportunities for technological exploration in this field are proposed.
Collapse
Affiliation(s)
- Guoqiang Liu
- Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, 999077, Hong Kong SAR, China
| | - Michael Hirtz
- Institute of Nanotechnology (INT) and Karlsruhe, Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Harald Fuchs
- Institute of Nanotechnology (INT) and Karlsruhe, Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Physical Institute and Center for Nanotechnology (CeNTech), University of Münster, Münster, 48149, Germany
| | - Zijian Zheng
- Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, 999077, Hong Kong SAR, China
| |
Collapse
|
13
|
Liu X, Kumar M, Calo’ A, Albisetti E, Zheng X, Manning KB, Elacqua E, Weck M, Ulijn RV, Riedo E. High-throughput protein nanopatterning. Faraday Discuss 2019; 219:33-43. [DOI: 10.1039/c9fd00025a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We demonstrate a high resolution and high-throughput patterning method to generate protein nanopatterns with sub-10 nm resolution by using thermochemical scanning probe lithography.
Collapse
Affiliation(s)
- Xiangyu Liu
- Tandon School of Engineering
- New York University
- Brooklyn
- USA
| | - Mohit Kumar
- Advanced Science Research Center (ASRC)
- CUNY Graduate Center
- New York
- USA
| | - Annalisa Calo’
- Tandon School of Engineering
- New York University
- Brooklyn
- USA
| | - Edoardo Albisetti
- Tandon School of Engineering
- New York University
- Brooklyn
- USA
- Dipartimento di Fisica
| | - Xiaouri Zheng
- Tandon School of Engineering
- New York University
- Brooklyn
- USA
| | | | | | - Marcus Weck
- Department of Chemistry
- New York University
- New York
- USA
| | - Rein V. Ulijn
- Advanced Science Research Center (ASRC)
- CUNY Graduate Center
- New York
- USA
| | - Elisa Riedo
- Tandon School of Engineering
- New York University
- Brooklyn
- USA
| |
Collapse
|
14
|
Buchegger B, Kreutzer J, Axmann M, Mayr S, Wollhofen R, Plochberger B, Jacak J, Klar TA. Proteins on Supported Lipid Bilayers Diffusing around Proteins Fixed on Acrylate Anchors. Anal Chem 2018; 90:12372-12376. [PMID: 30350628 PMCID: PMC6222595 DOI: 10.1021/acs.analchem.8b02588] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 10/16/2018] [Indexed: 01/04/2023]
Abstract
Mobility of proteins and lipids plays a major role in physiological processes. Platforms which were developed to study protein interaction between immobilized and mobile proteins suffer from shortcomings such as fluorescence quenching or complicated fabrication methods. Here we report a versatile platform comprising immobilized histidine-tagged proteins and biotinylated proteins in a mobile phase. Importantly, multiphoton photolithography was used for easy and fast fabrication of the platform and allows, in principle, extension of its application to three dimensions. The platform, which is made up of functionalized polymer structures embedded in a mobile lipid bilayer, shows low background fluorescence and allows for mobility of arbitrary proteins.
Collapse
Affiliation(s)
- Bianca Buchegger
- Institute
of Applied Physics, Johannes Kepler University
Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Johannes Kreutzer
- Institute
of Applied Physics, Johannes Kepler University
Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Markus Axmann
- Institute
of Medical Chemistry, Center for Pathobiochemistry and Genetics, Medical University of Vienna, Währinger Straße 10, 1090 Vienna, Austria
| | - Sandra Mayr
- School
of Medical Engineering and Applied Social Sciences, University of Applied Sciences Upper Austria, Garnisonstraße 21, 4020 Linz, Austria
| | - Richard Wollhofen
- Institute
of Applied Physics, Johannes Kepler University
Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Birgit Plochberger
- School
of Medical Engineering and Applied Social Sciences, University of Applied Sciences Upper Austria, Garnisonstraße 21, 4020 Linz, Austria
| | - Jaroslaw Jacak
- Institute
of Applied Physics, Johannes Kepler University
Linz, Altenberger Straße 69, 4040 Linz, Austria
- School
of Medical Engineering and Applied Social Sciences, University of Applied Sciences Upper Austria, Garnisonstraße 21, 4020 Linz, Austria
| | - Thomas A. Klar
- Institute
of Applied Physics, Johannes Kepler University
Linz, Altenberger Straße 69, 4040 Linz, Austria
| |
Collapse
|
15
|
Chand S, Beales P, Claeyssens F, Ciani B. Topography design in model membranes: Where biology meets physics. Exp Biol Med (Maywood) 2018; 244:294-303. [PMID: 30379575 DOI: 10.1177/1535370218809369] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
IMPACT STATEMENT Artificial membranes with complex topography aid the understanding of biological processes where membrane geometry plays a key regulatory role. In this review, we highlight how emerging material and engineering technologies have been employed to create minimal models of cell signaling pathways, in vitro. These artificial systems allow life scientists to answer ever more challenging questions with regards to mechanisms in cellular biology. In vitro reconstitution of biology is an area that draws on the expertise and collaboration between biophysicists, material scientists and biologists and has recently generated a number of high impact results, some of which are also discussed in this review.
Collapse
Affiliation(s)
- Sarina Chand
- 1 Centre for Membrane Structure and Dynamics, Krebs Institute and Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK.,2 The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
| | - Paul Beales
- 3 School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Frederik Claeyssens
- 2 The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
| | - Barbara Ciani
- 1 Centre for Membrane Structure and Dynamics, Krebs Institute and Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
| |
Collapse
|
16
|
Lee K, Zhang L, Yi Y, Wang X, Yu Y. Rupture of Lipid Membranes Induced by Amphiphilic Janus Nanoparticles. ACS NANO 2018; 12:3646-3657. [PMID: 29617553 DOI: 10.1021/acsnano.8b00759] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The surface coatings of nanoparticles determine their interaction with biomembranes, but studies have been limited almost exclusively to nanoparticles with a uniform surface chemistry. Although nanoparticles are increasingly made with complex surface chemistries to achieve multifunctionalities, our understanding of how a heterogeneous surface coating affects particle-biomembrane interaction has been lagging far behind. Here we report an investigation of this question in an experimental system consisting of amphiphilic "two-faced" Janus nanoparticles and supported lipid membranes. We show that amphiphilic Janus nanoparticles at picomolar concentrations induce defects in zwitterionic lipid bilayers. In addition to revealing the various effects of hydrophobicity and charge in particle-bilayer interactions, we demonstrate that the Janus geometry-the spatial segregation of hydrophobicity and charges on particle surface-causes nanoparticles to bind more strongly to bilayers and induce defects more effectively than particles with uniformly mixed surface functionalities. We combine experiments with computational simulation to further elucidate how amphiphilic Janus nanoparticles extract lipids to rupture intact lipid bilayers. This study provides direct evidence that the spatial arrangement of surface functionalities on a nanoparticle, rather than just its overall surface chemistry, plays a crucial role in determining how it interacts with biological membranes.
Collapse
Affiliation(s)
- Kwahun Lee
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , United States
| | - Liuyang Zhang
- State Key Laboratory for Manufacturing Systems Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Yi Yi
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , United States
| | - Xianqiao Wang
- College of Engineering , University of Georgia , Athens , Georgia 30602 , United States
| | - Yan Yu
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , United States
| |
Collapse
|
17
|
Chen CY, Wang CM, Li HH, Chan HH, Liao WS. Wafer-scale bioactive substrate patterning by chemical lift-off lithography. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:311-320. [PMID: 29441274 PMCID: PMC5789397 DOI: 10.3762/bjnano.9.31] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 01/17/2018] [Indexed: 05/06/2023]
Abstract
The creation of bioactive substrates requires an appropriate interface molecular environment control and adequate biological species recognition with minimum nonspecific attachment. Herein, a straightforward approach utilizing chemical lift-off lithography to create a diluted self-assembled monolayer matrix for anchoring diverse biological probes is introduced. The strategy encompasses convenient operation, well-tunable pattern feature and size, large-area fabrication, high resolution and fidelity control, and the ability to functionalize versatile bioarrays. With the interface-contact-induced reaction, a preformed alkanethiol self-assembled monolayer on a Au surface is ruptured and a unique defect-rich diluted matrix is created. This post lift-off region is found to be suitable for insertion of a variety of biological probes, which allows for the creation of different types of bioactive substrates. Depending on the modifications to the experimental conditions, the processes of direct probe insertion, molecular structure change-required recognition, and bulky biological species binding are all accomplished with minimum nonspecific adhesion. Furthermore, multiplexed arrays via the integration of microfluidics are also achieved, which enables diverse applications of as-prepared substrates. By embracing the properties of well-tunable pattern feature dimension and geometry, great local molecular environment control, and wafer-scale fabrication characteristics, this chemical lift-off process has advanced conventional bioactive substrate fabrication into a more convenient route.
Collapse
Affiliation(s)
- Chong-You Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Chang-Ming Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Hsiang-Hua Li
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Hong-Hseng Chan
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Ssu Liao
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
18
|
Takahashi K, Toyota T. Micrometer-Scale Membrane Transition of Supported Lipid Bilayer Membrane Reconstituted with Cytosol of Dictyostelium discoideum. Life (Basel) 2017; 7:life7010011. [PMID: 28272354 PMCID: PMC5370411 DOI: 10.3390/life7010011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/14/2017] [Accepted: 03/02/2017] [Indexed: 11/25/2022] Open
Abstract
Background: The transformation of the supported lipid bilayer (SLB) membrane by extracted cytosol from living resources, has recently drawn much attention. It enables us to address the question of whether the purified phospholipid SLB membrane, including lipids related to amoeba locomotion, which was discussed in many previous studies, exhibits membrane deformation in the presence of cytosol extracted from amoeba; Methods: In this report, a method for reconstituting a supported lipid bilayer (SLB) membrane, composed of purified phospholipids and cytosol extracted from Dictyostelium discoideum, is described. This technique is a new reconstitution method combining the artificial constitution of membranes with the reconstitution using animate cytosol (without precise purification at a molecular level), contributing to membrane deformation analysis; Results: The morphology transition of a SLB membrane composed of phosphatidylcholines, after the addition of cytosolic extract, was traced using a confocal laser scanning fluorescence microscope. As a result, pore formation in the SLB membrane was observed and phosphatidylinositides incorporated into the SLB membrane tended to suppress pore formation and expansion; Conclusions: The current findings imply that phosphatidylinositides have the potential to control cytoplasm activity and bind to a phosphoinositide-containing SLB membrane.
Collapse
Affiliation(s)
- Kei Takahashi
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan.
| | - Taro Toyota
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan.
| |
Collapse
|
19
|
Kataoka-Hamai C, Kaizuka Y, Taguchi T. Binding of Lipopolysaccharide and Cholesterol-Modified Gelatin on Supported Lipid Bilayers: Effect of Bilayer Area Confinement and Bilayer Edge Tension. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1250-1258. [PMID: 26735125 DOI: 10.1021/acs.langmuir.5b04302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Binding of amphiphilic molecules to supported lipid bilayers (SLBs) often results in lipid fibril extension from the SLBs. Previous studies proposed that amphiphiles with large and flexible hydrophilic regions trigger lipid fibril formation in SLBs by inducing membrane curvature via their hydrophilic regions. However, no experimental studies have verified this mechanism of fibril formation. In this work, we investigated the binding of lipopolysaccharide (LPS) and cholesterol-modified gelatin to SLBs using fluorescence microscopy. SLBs with restricted and unrestricted bilayer areas were employed to identify the mechanism of fibril generation. We show that the main cause of lipid fibril formation is an approximately 20% expansion in the bilayer area rather than increased membrane curvature. The data indicate that bilayer area confinement plays a critical role in morphological changes of SLBs even when bound amphiphilic molecules have a large hydrophilic domain. We also show that bilayer area change after LPS insertion is dependent on the patch shape of the SLB. When an SLB patch consists of a broad bilayer segment connected to a long thin streak, bilayer area expansion mainly occurs within the bilayer streak. The results indicate that LPS insertion causes net lipid flow from the broad bilayer region to the streak area. The differential increase in area is explained by the instability of planar bilayer streaks that originate from the large energetic contribution of line tension arising along the bilayer edge.
Collapse
Affiliation(s)
- Chiho Kataoka-Hamai
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yoshihisa Kaizuka
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science , 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Tetsushi Taguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| |
Collapse
|
20
|
Gan T, Wu B, Zhou X, Zhang G. Ultrahigh resolution, serial fabrication of three dimensionally-patterned protein nanostructures by liquid-mediated non-contact scanning probe lithography. RSC Adv 2016. [DOI: 10.1039/c6ra07715c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sub-100 nm and 3D-patterned structures of protein are fabricated on Au surface in solution by liquid-mediated non-contact scanning probe lithography.
Collapse
Affiliation(s)
- Tiansheng Gan
- Faculty of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Bo Wu
- Faculty of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Xuechang Zhou
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- P. R. China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| |
Collapse
|
21
|
Wang X, Zhang Y, Bi H, Han X. Supported lipid bilayer membrane arrays on micro-patterned ITO electrodes. RSC Adv 2016. [DOI: 10.1039/c6ra10294h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Lipid bilayer arrays were formed on micropatterned ITO electrodes. With this bilayer array platform both the fluorescence microscopy and electrochemical detection can be realized to explore the biophysical properties of cell membrane.
Collapse
Affiliation(s)
- Xuejing Wang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Ying Zhang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Hongmei Bi
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Xiaojun Han
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| |
Collapse
|
22
|
van Weerd J, Karperien M, Jonkheijm P. Supported Lipid Bilayers for the Generation of Dynamic Cell-Material Interfaces. Adv Healthc Mater 2015; 4:2743-79. [PMID: 26573989 DOI: 10.1002/adhm.201500398] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 08/03/2015] [Indexed: 12/13/2022]
Abstract
Supported lipid bilayers (SLB) offer unique possibilities for studying cellular membranes and have been used as a synthetic architecture to interact with cells. Here, the state-of-the-art in SLB-based technology is presented. The fabrication, analysis, characteristics and modification of SLBs are described in great detail. Numerous strategies to form SLBs on different substrates, and the means to patteren them, are described. The use of SLBs as model membranes for the study of membrane organization and membrane processes in vitro is highlighted. In addition, the use of SLBs as a substratum for cell analysis is presented, with discrimination between cell-cell and cell-extracellular matrix (ECM) mimicry. The study is concluded with a discussion of the potential for in vivo applications of SLBs.
Collapse
Affiliation(s)
- Jasper van Weerd
- Bioinspired Molecular Engineering; University of Twente; PO Box 217 7500 AE Enschede The Netherlands
- Dept. of Developmental BioEngineering; MIRA Institute for Biomedical Technology and Technical Medicine; University of Twente; PO Box 217 7500 AE Enschede The Netherlands
- Molecular Nanofabrication Group, MESA+; University of Twente; Enschede 7500 AE The Netherlands
| | - Marcel Karperien
- Dept. of Developmental BioEngineering; MIRA Institute for Biomedical Technology and Technical Medicine; University of Twente; PO Box 217 7500 AE Enschede The Netherlands
| | - Pascal Jonkheijm
- Bioinspired Molecular Engineering; University of Twente; PO Box 217 7500 AE Enschede The Netherlands
- Molecular Nanofabrication Group, MESA+; University of Twente; Enschede 7500 AE The Netherlands
| |
Collapse
|
23
|
Yi X, Gao H. Cell interaction with graphene microsheets: near-orthogonal cutting versus parallel attachment. NANOSCALE 2015; 7:5457-5467. [PMID: 25732111 DOI: 10.1039/c4nr06170e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent experiments indicate that graphene microsheets can either undergo a near-orthogonal cutting or a parallel attachment mode of interaction with cell membranes. Here we perform a theoretical analysis to characterize the deformed membrane microstructure and investigate how these two interaction modes are influenced by the splay, tilt, compression, tension, bending and adhesion energies of the membrane. Our analysis indicates that, driven by the membrane splay and tension energies, a two-dimensional microsheet such as graphene would adopt a near-perpendicular configuration with respect to the membrane in the transmembrane penetration mode, whereas the membrane bending and tension energies would lead to parallel attachment in the absence of cross membrane penetration. These interaction modes may have broad implications in applications involving drug delivery, cell encapsulation and protection, and the measurement of the dynamic cell response.
Collapse
Affiliation(s)
- Xin Yi
- School of Engineering, Brown University, Providence, Rhode Island 02912, USA.
| | | |
Collapse
|
24
|
Spycher PR, Hall H, Vogel V, Reimhult E. Patterning of supported lipid bilayers and proteins using material selective nitrodopamine-mPEG. Biomater Sci 2015. [DOI: 10.1039/c4bm00090k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We present a generic patterning process by which biomolecules in a passivated background are patterned directly from physiological buffer to microfabricated surfaces without the need for further processing.
Collapse
Affiliation(s)
- Philipp R. Spycher
- Laboratory of Applied Mechanobiology
- Department of Health Sciences and Technology
- ETH Zurich
- Switzerland
| | - Heike Hall
- Laboratory of Applied Mechanobiology
- Department of Health Sciences and Technology
- ETH Zurich
- Switzerland
| | - Viola Vogel
- Laboratory of Applied Mechanobiology
- Department of Health Sciences and Technology
- ETH Zurich
- Switzerland
| | - Erik Reimhult
- Laboratory for Surface Science and Technology
- Department of Materials
- ETH Zurich
- Switzerland
- Institute for Biologically Inspired Materials
| |
Collapse
|
25
|
Heath GR, Roth J, Connell SD, Evans SD. Diffusion in low-dimensional lipid membranes. NANO LETTERS 2014; 14:5984-8. [PMID: 25166509 DOI: 10.1021/nl503024v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The diffusion behavior of biological components in cellular membranes is vital to the function of cells. By collapsing the complexity of planar 2D membranes down to one dimension, fundamental investigations of bimolecular behavior become possible in one dimension. Here we develop lipid nanolithography methods to produce membranes, under fluid, with widths as low as 6 nm but extending to microns in length. We find reduced lipid mobility, as the width is reduced below 50 nm, suggesting different lipid packing in the vicinity of boundaries. The insertion of a membrane protein, M2, into these systems, allowed characterization of protein diffusion using high-speed AFM to demonstrate the first membrane protein 1D random walk. These quasi-1D lipid bilayers are ideal for testing and understanding fundamental concepts about the roles of dimensionality and size on physical properties of membranes from energy transfer to lipid packing.
Collapse
Affiliation(s)
- George R Heath
- School of Physics and Astronomy, University of Leeds , Leeds LS2 9JT, United Kingdom
| | | | | | | |
Collapse
|
26
|
Dutta D, Pulsipher A, Luo W, Yousaf MN. PI3 kinase enzymology on fluid lipid bilayers. Analyst 2014; 139:5127-33. [PMID: 25133271 DOI: 10.1039/c4an00998c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report the use of fluid lipid bilayer membrane as a model platform to study the influence of the bilayer microenvironment and composition on the enzymology in membrane. As a model system we determined the enzyme kinetics on membranes for the transformation of bilayers containing phosphoinositol(4,5)-bisphosphate (PI(4,5)P2) to phosphoinositol(3,4,5)-trisphosphate (PI(3,4,5)P3) by the enzyme phosphoinositol-3-kinase (PI3K) using radiolabeled ATP. The activity of the enzyme was monitored as a function of the radioactivity incorporated within the bilayer. The transformation of PI(4,5)P2 to PI(3,4,5)P3 was determined using a mass strip assay. The fluidity of the bilayer was confirmed by Fluorescence Recovery After Photobleaching (FRAP) experiments. Kinetic simulations were performed based on Langmuir adsorption and Michaelis-Menton kinetics equations to generate the rate constants for the enzymatic reaction. The effect of cholesterol on the enzyme kinetics was studied by doping the bilayer with 1% cholesterol. This leads to significant reduction in reaction rate due to change in membrane microenvironment. This strategy provides a method to study the enzymology of various kinases and phosphatases occurring at the membrane and also how these reactions are affected by the membrane composition and surface microenvironment.
Collapse
Affiliation(s)
- Debjit Dutta
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | | | | |
Collapse
|
27
|
Adutler-Lieber S, Zaretsky I, Platzman I, Deeg J, Friedman N, Spatz JP, Geiger B. Engineering of synthetic cellular microenvironments: implications for immunity. J Autoimmun 2014; 54:100-11. [PMID: 24951031 DOI: 10.1016/j.jaut.2014.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 05/19/2014] [Indexed: 01/01/2023]
Abstract
In this article, we discuss novel synthetic approaches for studying the interactions of cells with their microenvironment. Notably, critical cellular processes such as growth, differentiation, migration, and fate determination, are tightly regulated by interactions with neighboring cells, and the surrounding extracellular matrix. Given the huge complexity of natural cellular environments, and their rich molecular and physical diversity, the mission of understanding "environmental signaling" at a molecular-mechanistic level appears to be extremely challenging. To meet these challenges, attempts have been made in recent years to design synthetic matrices with defined chemical and physical properties, which, artificial though they may be, could reveal basic "design principles" underlying the physiological processes. Here, we summarize recent developments in the characterization of the chemical and physical properties of cell sensing and adhesion, as well as the design and use of engineered, micro- to nanoscale patterned and confined environments, for systematic, comprehensive modulation of the cells' environment. The power of these biomimetic surfaces to highlight environmental signaling events in cells, and in immune cells in particular, will be discussed.
Collapse
Affiliation(s)
- Shimrit Adutler-Lieber
- Department of Molecular Cell Biology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Irina Zaretsky
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Ilia Platzman
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Janosch Deeg
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Nir Friedman
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Joachim P Spatz
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Benjamin Geiger
- Department of Molecular Cell Biology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| |
Collapse
|
28
|
El Zubir O, Barlow I, Leggett GJ, Williams NH. Fabrication of molecular nanopatterns at aluminium oxide surfaces by nanoshaving of self-assembled monolayers of alkylphosphonates. NANOSCALE 2013; 5:11125-11131. [PMID: 24068243 DOI: 10.1039/c3nr04701f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Nanoshaving, by tracing an atomic force microscope probe across a surface at elevated load, has been used to fabricate nanostructures in self-assembled monolayers of alkylphosphonates adsorbed at aluminium oxide surfaces. The simple process is implemented under ambient conditions. Because of the strong bond between the alkylphosphonates and the oxide surface, loads in excess of 400 nN are required to pattern the monolayer. Following patterning of octadecylphosphonate SAMs, adsorption of aminobutyl phosphonate yielded features as small as 39 nm. Shaving of monolayers of aryl azide-terminated alkylphosphonates, followed by attachment of polyethylene glycol to unmodified regions in a photochemical coupling reaction, yielded 102 nm trenches into which NeutrAvidin coated, dye-labelled, polymer nanospheres could be deposited, yielding bright fluorescence with little evidence of non-specific adsorption to other regions of the surface. Structures formed in alkylphosphonate films by nanoshaving were used to etch structures into the underlying metal. Because of the isotropic nature of the etch process, and the large grain size, some broadening was observed, but features 25-35 nm deep and 180 nm wide were fabricated.
Collapse
Affiliation(s)
- Osama El Zubir
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, UK.
| | | | | | | |
Collapse
|
29
|
Hughes LD, Boxer SG. DNA-based patterning of tethered membrane patches. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12220-7. [PMID: 23992147 PMCID: PMC3815428 DOI: 10.1021/la402537p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Solid-supported lipid bilayers are useful model systems for mimicking cellular membranes; however, the interaction of the bilayer with the surface can disrupt the function of integral membrane proteins and impede topological transformations such as membrane fusion. As a result, a variety of tethered or cushioned lipid bilayer architectures have been described, which retain the proximity to the surface, enabling surface-sensitive techniques, but physically distance the bilayer from the surface. We have recently developed a method for spatially separating a lipid bilayer from a solid support using DNA lipids. In this system, a DNA strand is covalently attached to a glass slide or SiO2 wafer, and giant unilamellar vesicles (GUVs) displaying the complement rupture to form a planar lipid bilayer tethered above the surface. However, the location of the patch is random, determined by where the DNA-GUV initially binds to its complement. To allow greater versatility and control, we sought a way to pattern tethered membrane patches. We present a method for creating spatially distinct tethered membrane patches on a glass slide using microarray printing. Surface-reactive DNA sequences are spotted onto the slide, incubated to covalently link the DNA to the surface, and DNA-GUVs patches are formed selectively on the printed DNA. By interfacing the bilayers with microfluidic flow cells, materials can be added on top of or fused into the membrane to change the composition of the bilayers. With further development, this approach would enable rapid screening of different patches in protein binding assays and would enable interfacing patches with electrical detectors.
Collapse
Affiliation(s)
- Laura D. Hughes
- Department of Chemistry, Stanford University, Stanford, California 94305-5012, United States
| | - Steven G. Boxer
- Department of Chemistry, Stanford University, Stanford, California 94305-5012, United States
| |
Collapse
|
30
|
Ul-Haq E, Patole S, Moxey M, Amstad E, Vasilev C, Hunter CN, Leggett GJ, Spencer ND, Williams NH. Photocatalytic nanolithography of self-assembled monolayers and proteins. ACS NANO 2013; 7:7610-8. [PMID: 23971891 PMCID: PMC4327559 DOI: 10.1021/nn402063b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/23/2013] [Indexed: 05/23/2023]
Abstract
Self-assembled monolayers of alkylthiolates on gold and alkylsilanes on silicon dioxide have been patterned photocatalytically on sub-100 nm length-scales using both apertured near-field and apertureless methods. Apertured lithography was carried out by means of an argon ion laser (364 nm) coupled to cantilever-type near-field probes with a thin film of titania deposited over the aperture. Apertureless lithography was carried out with a helium-cadmium laser (325 nm) to excite titanium-coated, contact-mode atomic force microscope (AFM) probes. This latter approach is readily implementable on any commercial AFM system. Photodegradation occurred in both cases through the localized photocatalytic degradation of the monolayer. For alkanethiols, degradation of one thiol exposed the bare substrate, enabling refunctionalization of the bare gold by a second, contrasting thiol. For alkylsilanes, degradation of the adsorbate molecule provided a facile means for protein patterning. Lines were written in a protein-resistant film formed by the adsorption of oligo(ethylene glycol)-functionalized trichlorosilanes on glass, leading to the formation of sub-100 nm adhesive, aldehyde-functionalized regions. These were derivatized with aminobutylnitrilotriacetic acid, and complexed with Ni(2+), enabling the binding of histidine-labeled green fluorescent protein, which yielded bright fluorescence from 70-nm-wide lines that could be imaged clearly in a confocal microscope.
Collapse
Affiliation(s)
- Ehtsham Ul-Haq
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom
| | - Samson Patole
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom
- Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
| | - Mark Moxey
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom
| | - Esther Amstad
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Cvetelin Vasilev
- Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
| | - C. Neil Hunter
- Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
| | - Graham J. Leggett
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom
| | - Nicholas D. Spencer
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Nicholas H. Williams
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom
| |
Collapse
|
31
|
Platzman I, Janiesch JW, Matić J, Spatz JP. Artificial Antigen-Presenting Interfaces in the Service of Immunology. Isr J Chem 2013. [DOI: 10.1002/ijch.201300060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
32
|
Gan T, Zhou X, Ma C, Liu X, Xie Z, Zhang G, Zheng Z. Liquid-mediated three-dimensional scanning probe nanosculpting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2851-2856. [PMID: 23554330 DOI: 10.1002/smll.201300238] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Indexed: 06/02/2023]
Abstract
3D functional polymer brushes are fabricated by liquid-mediated scanning probe nanosculpting (LSPN). Surface-tethered functional polymer brushes, which are immersed in their good solvent, are mechanically cleaved away from the substrate by the AFM tip at high forces, and immediately imaged in situ with the same AFM tip at low applied forces.
Collapse
Affiliation(s)
- Tiansheng Gan
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | | | | | | | | | | | | |
Collapse
|
33
|
Ogunyankin MO, Huber DL, Sasaki DY, Longo ML. Nanoscale patterning of membrane-bound proteins formed through curvature-induced partitioning of phase-specific receptor lipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6109-6115. [PMID: 23642033 DOI: 10.1021/la401011d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This work describes a technique for forming high-density arrays and patterns of membrane-bound proteins through binding to a curvature-organized compositional pattern of metal-chelating lipids (Cu(2+)-DOIDA or Cu(2+)-DSIDA). In this bottom-up approach, the underlying support is an e-beam formed, square lattice pattern of hemispheres. This curvature pattern sorts Cu(2+)-DOIDA to the 200 nm hemispherical lattice sites of a 600 nm × 600 nm unit cell in Ld - Lo phase separated lipid multibilayers. Binding of histidine-tagged green fluorescent protein (His-GFP) creates a high density array of His-GFP-bound pixels localized to the square lattice sites. In comparison, the negative pixel pattern is created by sorting Cu(2+)-DSIDA in Ld - Lβ' phase separated lipid multibilayers to the flat grid between the lattice sites followed by binding to His-GFP. Lattice defects in the His-GFP pattern lead to interesting features such as pattern circularity. We also observe defect-free arrays of His-GFP that demonstrate perfect arrays can be formed by this method suggesting the possibility of using this approach for the localization of various active molecules to form protein, DNA, or optically active molecular arrays.
Collapse
Affiliation(s)
- Maria O Ogunyankin
- Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, United States
| | | | | | | |
Collapse
|
34
|
Zhang Y, Wang L, Wang X, Qi G, Han X. Forming lipid bilayer membrane arrays on micropatterned polyelectrolyte film surfaces. Chemistry 2013; 19:9059-63. [PMID: 23695862 DOI: 10.1002/chem.201204419] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 03/25/2013] [Indexed: 11/11/2022]
Abstract
A novel method of forming lipid bilayer membrane arrays on micropatterned polyelectrolyte film surfaces is introduced. Polyelectrolyte films were fabricated by the layer-by-layer technique on a silicon oxide surface modified with a 3-aminopropyltriethoxysilane (APTES) monolayer. The surface pK(a) value of the APTES monolayer was determined by cyclic voltammetry to be approximately 5.61, on the basis of which a pH value of 2.0 was chosen for layer-by-layer assembly. Micropatterned polyelectrolyte films were obtained by deep-UV (254 nm) photolysis though a mask. Absorbed fluorescent latex beads were used to visualize the patterned surfaces. Lipid bilayer arrays were fabricated on the micropatterned surfaces by immersing the patterned substrates into a solution containing egg phosphatidylcholine vesicles. Fluorescence recovery after photobleaching studies yielded a lateral diffusion coefficient for probe molecules of 1.31±0.17 μm(2) s(-1) in the bilayer region, and migration of the lipid NBD PE in bilayer lipid membrane arrays was observed in an electric field.
Collapse
Affiliation(s)
- Ying Zhang
- School of Chemical Engineering and Technology, Harbin Institute of Technology, No. 92, West Da-Zhi Street, Harbin, 150001, P.R. China
| | | | | | | | | |
Collapse
|
35
|
Li JR, Shi L, Deng Z, Lo SH, Liu GY. Nanostructures of designed geometry and functionality enable regulation of cellular signaling processes. Biochemistry 2012; 51:5876-93. [PMID: 22783801 PMCID: PMC4041195 DOI: 10.1021/bi200880p] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Extracellular matrices (ECM) triggered cellular signaling processes often begin with the clustering of the cellular receptors such as integrin and FcεRI. The sizes of these initial protein complexes or clusters are tens to 100 nm in dimension; therefore, engineered nanostructures could provide effective mimics of ECM for investigation and control of the initial and downstream specific signaling processes. This current topic discusses recent advances in nanotechnology in the context of design and production of matching chemical functionality and geometry for control of specific cellular signaling processes. Two investigations are reported to demonstrate this concept: (a) how the presentation of antigen at the nanometer scale would influence the aggregation of FcεRI, which would impact the formation of activation complexes, leading to the rearrangement of actin in cytoskeleton and degranulation or activation of mast cells; (b) how the engineered nanostructure could guide the initial integrin clustering, which would impact the formation of focal adhesion and downstream cell signaling cascades, leading to polarization, migration, and morphological changes. Complementary to engineered ECMs using synthetic ligands or peptides, or topographic control at the micrometer scale, nanostructures of designed geometry and chemical functionality provide new and effective biochemical cues for regulation of cellular signaling processes and downstream behaviors.
Collapse
Affiliation(s)
- Jie-Ren Li
- Department of Chemistry, University of California, Davis, California 95616
| | - Lifang Shi
- Department of Chemistry, University of California, Davis, California 95616
| | - Zhao Deng
- Department of Chemistry, University of California, Davis, California 95616
| | - Su Hao Lo
- Department of Biochemistry and Molecular Medicine, Center for Tissue Regeneration and Repair, University of California-Davis, Medical Center, Sacramento, California 95817
| | - Gang-yu Liu
- Department of Chemistry, University of California, Davis, California 95616
| |
Collapse
|
36
|
Ogunyankin MO, Torres A, Yaghmaie F, Longo ML. Lipid domain pixelation patterns imposed by e-beam fabricated substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7107-13. [PMID: 22530589 PMCID: PMC3357440 DOI: 10.1021/la3008415] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This work describes a technique for forming nanometer-scale pixilated lipid domains that are self-organized into geometric patterns residing on a square lattice. In this process, a lipid multibilayer stack is deposited onto a silica substrate patterned with a square lattice array of bumps, hemispherical on their sides, formed by electron beam lithography. Domain patterns are shown to be confined to the flat grid between the bumps and composed of connected and individual domain pixels. Analysis of lattices of varying sizes shows that domain pattern formation is driven by mechanical energy minimization and packing constraints. We demonstrate single lattice sizes and a gradient in lattice size varying from the micrometer to the 100 nm scale applicable to precise arraying, patterning, and transport of biomolecules that partition to lipid domains.
Collapse
Affiliation(s)
- Maria O. Ogunyankin
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California 95616, United States
| | - Andrea Torres
- Northern California Nanotechnology Center Process Development, University of California Davis, Davis, California 95616, United States
| | - Frank Yaghmaie
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California 95616, United States
- Northern California Nanotechnology Center Process Development, University of California Davis, Davis, California 95616, United States
| | - Marjorie L. Longo
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California 95616, United States
| |
Collapse
|
37
|
Bovine serum albumin film as a template for controlled nanopancake and nanobubble formation: in situ atomic force microscopy and nanolithography study. Colloids Surf B Biointerfaces 2012; 94:213-9. [PMID: 22341519 DOI: 10.1016/j.colsurfb.2012.01.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 11/20/2011] [Accepted: 01/23/2012] [Indexed: 11/24/2022]
Abstract
Air nanobubbles and nanopancakes were investigated in situ by both tapping mode atomic force microscopy (TM AFM) and atomic force nanolithography techniques employing bovine serum albumin (BSA) film supported by highly oriented pyrolytic graphite (HOPG). The BSA denaturation induced by the water-to-ethanol exchange served for conservation of nanobubble and nanopancake sites appearing as imprints in BSA film left by gaseous cavities formerly present on the interface in the aqueous environment. Once the BSA film was gently removed by the nanoshaving technique applied in ethanol, a clean basal plane HOPG area with well-defined dimensions was regenerated. The subsequent reverse ethanol-to-water exchange led to the re-formation of nanopancakes specifically at the nanoshaved area. Our approach paves the way for the study of gaseous nanostructures with defined dimensions, formed at solid-liquid interface under controlled conditions.
Collapse
|
38
|
Narui Y, Salaita KS. Dip-pen nanolithography of optically transparent cationic polymers to manipulate spatial organization of proteolipid membranes. Chem Sci 2012. [DOI: 10.1039/c1sc00475a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
39
|
Lipid Bilayer Membrane Arrays: Fabrication and Applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2012; 131:121-52. [DOI: 10.1007/10_2012_135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
40
|
Chalmeau J, le Grimellec C, Sternick J, Vieu C. Patterned domains of supported phospholipid bilayer using microcontact printing of Pll-g-PEG molecules. Colloids Surf B Biointerfaces 2012; 89:188-95. [DOI: 10.1016/j.colsurfb.2011.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 08/08/2011] [Accepted: 09/09/2011] [Indexed: 11/24/2022]
|
41
|
Yoon JA, Kamada J, Koynov K, Mohin J, Nicolaÿ R, Zhang Y, Balazs AC, Kowalewski T, Matyjaszewski K. Self-Healing Polymer Films Based on Thiol–Disulfide Exchange Reactions and Self-Healing Kinetics Measured Using Atomic Force Microscopy. Macromolecules 2011. [DOI: 10.1021/ma2015134] [Citation(s) in RCA: 361] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeong Ae Yoon
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Jun Kamada
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
- Material Science Laboratory, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura,
Chiba 299-0265, Japan
| | - Kaloian Koynov
- Max Planck Institutes for Polymer Research, Ackermannweg 10, Mainz 55128,
Germany
| | - Jake Mohin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Renaud Nicolaÿ
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Yaozhong Zhang
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Anna C. Balazs
- Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania
15213, United States
| | - Tomasz Kowalewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| |
Collapse
|
42
|
Nanofabrication for the analysis and manipulation of membranes. Ann Biomed Eng 2011; 40:1356-66. [PMID: 22143598 DOI: 10.1007/s10439-011-0479-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 11/23/2011] [Indexed: 12/21/2022]
Abstract
Recent advancements and applications of nanofabrication have enabled the characterization and control of biological membranes at submicron scales. This review focuses on the application of nanofabrication towards the nanoscale observing, patterning, sorting, and concentrating membrane components. Membranes on living cells are a necessary component of many fundamental cellular processes that naturally incorporate nanoscale rearrangement of the membrane lipids and proteins. Nanofabrication has advanced these understandings, for example, by providing 30 nm resolution of membrane proteins with metal-enhanced fluorescence at the tip of a scanning probe on fixed cells. Naturally diffusing single molecules at high concentrations on live cells have been observed at 60 nm resolution by confining the fluorescence excitation light through nanoscale metallic apertures. The lateral reorganization on the plasma membrane during membrane-mediated signaling processes has been examined in response to nanoscale variations in the patterning and mobility of the signal-triggering molecules. Further, membrane components have been separated, concentrated, and extracted through on-chip electrophoretic and microfluidic methods. Nanofabrication provides numerous methods for examining and manipulating membranes for both greater understandings of membrane processes as well as for the application of membranes to other biophysical methods.
Collapse
|
43
|
Wittenberg NJ, Im H, Johnson TW, Xu X, Warrington AE, Rodriguez M, Oh SH. Facile assembly of micro- and nanoarrays for sensing with natural cell membranes. ACS NANO 2011; 5:7555-64. [PMID: 21842844 PMCID: PMC3183111 DOI: 10.1021/nn202554t] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Microarray technology has facilitated many powerful high-throughput studies in the fields of genetics and proteomics, among others. However, preparation of microarrays composed of cell-derived membranes with embedded receptors has proven difficult. Here we describe a new method for forming microarrays composed of synthetic lipid vesicles and natural cell membranes. The method is based upon assembly of vesicles and natural membranes into recessed micro- and nanowells and using a polydimethylsiloxane (PDMS) block as a "squeegee." This method is used to assemble phospholipid vesicles into arrays with micrometer and nanoscale dimensions. Native myelin and neuronal lipid raft arrays are also formed in 30 min or less. We show the natural membrane arrays can be used for sensing lipid-protein interactions by detecting cholera toxin binding to ganglioside GM1 in neuronal lipid rafts. In multicomponent arrays myelin can be distinguished from neuronal rafts by antibody binding to cell-specific surface antigens. Finally, myelin arrays formed in gold nanowells are used for surface plasmon resonance sensing. This assembly approach is simple, broadly applicable, and opens up new avenues of research not easily accomplished with standard microarray technology.
Collapse
Affiliation(s)
- Nathan J. Wittenberg
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Hyungsoon Im
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Timothy W. Johnson
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Xiaohua Xu
- Departments of Neurology and Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Arthur E. Warrington
- Departments of Neurology and Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Moses Rodriguez
- Departments of Neurology and Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Sang-Hyun Oh
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| |
Collapse
|
44
|
Zhou X, Boey F, Huo F, Huang L, Zhang H. Chemically functionalized surface patterning. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2273-89. [PMID: 21678549 DOI: 10.1002/smll.201002381] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Indexed: 05/24/2023]
Abstract
Patterning substrates with versatile chemical functionalities from micro- to nanometer scale is a long-standing and interesting topic. This review provides an overview of a range of techniques commonly used for surface patterning. The first section briefly introduces conventional micropatterning tools, such as photolithography and microcontact printing. The second section focuses on the currently used nanolithographic techniques, for example, scanning probe lithography (SPL), and their applications in surface patterning. Their advantages and disadvantages are also demonstrated. In the last section, dip-pen nanolithography (DPN) is emphatically illustrated, with a particular stress on the patterning and applications of biomolecules.
Collapse
Affiliation(s)
- Xiaozhu Zhou
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | | | | | | | | |
Collapse
|
45
|
Kolivoška V, Gál M, Lachmanová Š, Janda P, Sokolová R, Hromadová M. Nanoshaving of bovine serum albumin films adsorbed on monocrystalline surfaces and interfaces. ACTA ACUST UNITED AC 2011. [DOI: 10.1135/cccc2011080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We apply the ex situ and in situ atomic force microscopy (AFM) nanoshaving technique to investigate the bovine serum albumin (BSA) films on Au(111) and highly oriented pyrolytic graphite (HOPG) surfaces. The both substrates were found to support the BSA films. The section analysis performed before and after the AFM nanoshaving allowed the determination of the film thickness. On Au(111) surface, both ex situ and in situ nanoshaving revealed that the film is formed by strongly denatured BSA molecules, with the average thickness 2.3 ± 0.2 and 2.0 ± 0.2 nm, respectively. On the other hand, the HOPG substrate was found to support less denatured BSA films, with the average film thickness 4.7 ± 0.3 and 5.2 ± 0.3 nm, based on the ex situ and in situ measurements, respectively.
Collapse
|
46
|
Kaufmann S, Sobek J, Textor M, Reimhult E. Supported lipid bilayer microarrays created by non-contact printing. LAB ON A CHIP 2011; 11:2403-2410. [PMID: 21623437 DOI: 10.1039/c1lc20073a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Arrays of supported lipid bilayers (SLBs) provide great potential for future drug development and multiplexed biological research, but are difficult to prepare due to the sensitivity of both the lipid and protein structural arrangement to air exposure. A novel way to produce arrays of SLBs is presented based on non-contact dispensing of vesicles to a substrate through a thin surface confined water film. The approach presents many degrees of freedom since it is not limited to a specific substrate, lipid composition, linker or controlled environment. The method allows adjustment of spot size (180-360 μm) by repeated dispensing as well as control over the composition of the spots and subsequent analytes. SLB formation by vesicle adsorption and rupture allows for incorporation of membrane proteins through pre-formed proteoliposomes. Dispensing through a dip-and-rinse water film avoids contamination, disruptive drying and the need for complex buffer compositions. Furthermore, no humidity control is necessary which simplifies the production step and prolongs the life-time of the spotting system. We characterize the method with respect to control over spot size, bilayer mobility and the formation process as well as demonstrate the possibility to fuse bilayer spots with subsequently added vesicles. Since complex lipid compositions and multiple spotting nozzles can be used, this novel technique is expected to be a promising platform for future applications, e.g. patterning to monitor peptide/protein-lipid interactions, for glycomics using glycolipids or lipopolysaccharides, and to study mixing of spatially confined lipid membranes.
Collapse
Affiliation(s)
- Stefan Kaufmann
- Laboratory for Surface Science and Technolgy, Department of Materials ETH Zurich, Zurich, Switzerland
| | | | | | | |
Collapse
|
47
|
Simulations of lipid vesicle rupture induced by an adjacent supported lipid bilayer patch. Colloids Surf B Biointerfaces 2011; 82:632-6. [DOI: 10.1016/j.colsurfb.2010.09.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Accepted: 09/09/2010] [Indexed: 11/21/2022]
|
48
|
Abstract
T lymphocytes are a key regulatory component of the adaptive immune system. Understanding how the micro- and nano-scale details of the extracellular environment influence T cell activation may have wide impact on the use of T cells for therapeutic purposes. In this article, we examine how the micro- and nano-scale presentation of ligands to cell surface receptors, including microscale organization and nanoscale mobility, influences the activation of T cells. We extend these studies to include the role of cell-generated forces, and the rigidity of the microenvironment, on T cell activation. These approaches enable delivery of defined signals to T cells, a step toward understanding the cell-cell communication in the immune system, and developing micro/nano- and material- engineered systems for tailoring immune responses for adoptive T cell therapies.
Collapse
Affiliation(s)
- Keyue Shen
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, U.S.A
| | | | | | | |
Collapse
|
49
|
Bally M, Bailey K, Sugihara K, Grieshaber D, Vörös J, Städler B. Liposome and lipid bilayer arrays towards biosensing applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2481-97. [PMID: 20925039 DOI: 10.1002/smll.201000644] [Citation(s) in RCA: 161] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Sensitive and selective biosensors for high-throughput screening are having an increasing impact in modern medical care. The establishment of robust protein biosensing platforms however remains challenging, especially when membrane proteins are involved. Although this type of proteins is of enormous relevance since they are considered in >60% of the pharmaceutical drug targets, their fragile nature (i.e., the requirement to preserve their natural lipid environment to avoid denaturation and loss of function) puts strong additional prerequisites onto a successful biochip. In this review, the leading approaches to create lipid membrane-based arrays towards the creation of membrane protein biosensing platforms are described. Liposomes assembled in micro- and nanoarrays and the successful set-ups containing functional membrane proteins, as well as the use of liposomes in networks, are discussed in the first part. Then, the complementary approaches to create cell-mimicking supported membrane patches on a substrate in an array format will be addressed. Finally, the progress in assembling free-standing (functional) lipid bilayers over nanopore arrays for ion channel sensing will be reported. This review illustrates the rapid pace by which advances are being made towards the creation of a heterogeneous biochip for the high-throughput screening of membrane proteins for diagnostics, drug screening, or drug discovery purposes.
Collapse
Affiliation(s)
- Marta Bally
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | | | | | | | | | | |
Collapse
|
50
|
Yu CH, Groves JT. Engineering supported membranes for cell biology. Med Biol Eng Comput 2010; 48:955-63. [PMID: 20559751 PMCID: PMC2944960 DOI: 10.1007/s11517-010-0634-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Accepted: 05/07/2010] [Indexed: 11/19/2022]
Abstract
Cell membranes exhibit multiple layers of complexity, ranging from their specific molecular content to their emergent mechanical properties and dynamic spatial organization. Both compositional and geometrical organizations of membrane components are known to play important roles in life processes, including signal transduction. Supported membranes, comprised of a bilayer assembly of phospholipids on the solid substrate, have been productively served as model systems to study wide range problems in cell biology. Because lateral mobility of membrane components is readily preserved, supported lipid membranes with signaling molecules can be utilized to effectively trigger various intercellular reactions. The spatial organization and mechanical deformation of supported membranes can also be manipulated by patterning underlying substrates with modern micro- and nano-fabrication techniques. This article focuses on various applications and methods to spatially patterned biomembranes by means of curvature modulations and spatial reorganizations, and utilizing them to interface with live cells. The integration of biological components into synthetic devices provides a unique approach to investigate molecular mechanisms in cell biology.
Collapse
Affiliation(s)
- Cheng-han Yu
- Research Centre of Excellence in Mechanobiology, National University of Singapore, Singapore
| | | |
Collapse
|