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Monolayer surface chemistry enables 2-colour single molecule localisation microscopy of adhesive ligands and adhesion proteins. Nat Commun 2018; 9:3320. [PMID: 30127420 PMCID: PMC6102261 DOI: 10.1038/s41467-018-05837-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 07/30/2018] [Indexed: 12/20/2022] Open
Abstract
Nanofabricated and nanopatterned surfaces have revealed the sensitivity of cell adhesion to nanoscale variations in the spacing of adhesive ligands such as the tripeptide arginine-glycine-aspartic acid (RGD). To date, surface characterisation and cell adhesion are often examined in two separate experiments so that the localisation of ligands and adhesion proteins cannot be combined in the same image. Here we developed self-assembled monolayer chemistry for indium tin oxide (ITO) surfaces for single molecule localisation microscopy (SMLM). Cell adhesion and spreading were sensitive to average RGD spacing. At low average RGD spacing, a threshold exists of 0.8 RGD peptides per µm2 that tether cells to the substratum but this does not enable formation of focal adhesions. These findings suggest that cells can sense and engage single adhesive ligands but ligand clustering is required for cell spreading. Thus, our data reveal subtle differences in adhesion biology that may be obscured in ensemble measurements. To date, the precise localisation of ligands and adhesion proteins are determined in two parallel characterization setups. Here, the authors report a self-assembled monolayer chemistry for indium tin oxide surfaces allowing single molecule localisation microscopy (SMLM) imaging of ligands and adhesion proteins in a single experiment.
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2
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Peterson AM, Pilz-Allen C, Möhwald H, Shchukin DG. Evaluation of the role of polyelectrolyte deposition conditions in growth factor release. J Mater Chem B 2014; 2:2680-2687. [DOI: 10.1039/c3tb21757d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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3
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Wu MG, Hsu HL, Hsiao KW, Hsieh CC, Chen HY. Vapor-deposited parylene photoresist: a multipotent approach toward chemically and topographically defined biointerfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14313-14322. [PMID: 22966949 DOI: 10.1021/la302099y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Poly(4-benzoyl-p-xylylene-co-p-xylylene), a biologically compatible photoreactive polymer belonging to the parylene family, can be deposited using a chemical vapor deposition (CVD) polymerization process on a wide range of substrates. This study discovered that the solvent stability of poly(4-benzoyl-p-xylylene-co-p-xylylene) in acetone is significantly increased when exposed to approximately 365 nm of UV irradiation, because of the cross-linking of benzophenone side chains with adjacent molecules. This discovery makes the photodefinable polymer a powerful tool for use as a negative photoresist for surface microstructuring and biointerface engineering purposes. The polymer is extensively characterized using infrared reflection adsorption spectroscopy (IRRAS), scanning electron microscopy (SEM), and imaging ellipsometry. Furthermore, the vapor-based polymer coating process provides access to substrates with unconventional and complex three-dimensional (3D) geometries, as compared to conventional spin-coated resists that are limited to flat 2D assemblies. Moreover, this photoresist technology is seamlessly integrated with other functionalized parylenes including aldehyde-, acetylene-, and amine-functionalized parylenes to create unique surface microstructures that are chemically and topographically defined. The photopatterning and immobilization protocols described in this paper represent an approach that avoids contact between harmful substances (such as solvents and irradiations) and sensitive biomolecules. Finally, multiple biomolecules on planar substrates, as well as on unconventional 3D substrates (e.g., stents), are presented.
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Affiliation(s)
- Mu-Gi Wu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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4
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Peterson AM, Möhwald H, Shchukin DG. pH-Controlled Release of Proteins from Polyelectrolyte-Modified Anodized Titanium Surfaces for Implant Applications. Biomacromolecules 2012; 13:3120-6. [DOI: 10.1021/bm300928s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Amy M. Peterson
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam-Golm,
Germany
| | - Helmuth Möhwald
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam-Golm,
Germany
| | - Dmitry G. Shchukin
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam-Golm,
Germany
- Stephenson Institute
for Renewable Energy, University of Liverpool, Liverpool L69 3BX, United Kingdom
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5
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Tsai MY, Lin CY, Huang CH, Gu JA, Huang ST, Yu J, Chen HY. Vapor-based synthesis of maleimide-functionalized coating for biointerface engineering. Chem Commun (Camb) 2012; 48:10969-71. [DOI: 10.1039/c2cc35892a] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Chen LJ, Seo JH, Eller MJ, Verkhoturov SV, Shah SS, Revzin A, Schweikert EA. Quantitative label-free characterization of avidin-biotin assemblies on silanized glass. Anal Chem 2011; 83:7173-8. [PMID: 21842883 PMCID: PMC3186069 DOI: 10.1021/ac2016085] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, a time-of-flight secondary ion mass spectrometer TOF-SIMS, operating in the event-by-event bombardment/detection mode was used to characterize avidin-biotin assemblies on silane-modified glass substrates. SIMS was used to analyze several variants of the biointerface, including avidin physically adsorbed on a monofunctional acryl silane surface and covalently attached on monofunctional (amine terminated) and bifunctional (amine and acryl terminated) silanes. The goal of these studies was to determine density of avidin and biotin layers chemically or physically adsorbed on silanized glass substrate. An individual impact of a C(60) projectile used in this study creates a hemispherical crater (∼10 nm in diameter) and emits large numbers of secondary ions from the same nanovolume. Thus, a single impact enables one to unfold distinct secondary ions that span the thickness of the assembled film. This method was used to monitor the presence of glass, silane, and protein ions and to estimate the thickness and density of the avidin layer. In addition, we employed the double coincidence mass spectrometry approach to identify ions coemitted from a specific stratum of the biointerface. This approach was used to determine density of biotin and avidin immobilization while eliminating interferences from isobaric ions that originated from other constituents on the surface. Overall, novel TOF-SIMS quantitative approaches employed here were useful for examining complex biointerfaces and determining both lateral and in depth composition of the film.
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Affiliation(s)
- Li-Jung Chen
- Department of Chemistry, Texas A&M University, College Station, TX, USA
| | - Jeong Hyun Seo
- Department of Biomedical Engineering, University of California, Davis, CA, USA
| | - Michael J. Eller
- Department of Chemistry, Texas A&M University, College Station, TX, USA
| | | | - Sunny S. Shah
- Department of Biomedical Engineering, University of California, Davis, CA, USA
| | - Alexander Revzin
- Department of Biomedical Engineering, University of California, Davis, CA, USA
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Ghasemi M, Minier MJG, Tatoulian M, Chehimi MM, Arefi-Khonsari F. Ammonia Plasma Treated Polyethylene Films for Adsorption or Covalent Immobilization of Trypsin: Quantitative Correlation between X-ray Photoelectron Spectroscopy Data and Enzyme Activity. J Phys Chem B 2011; 115:10228-38. [DOI: 10.1021/jp204097a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahsa Ghasemi
- Chimie ParisTech, Laboratoire de Génie des Procédés Plasma et Traitements de Surface (LGPPTS), EA 3492, 75005 Paris, France
- UPMC Univ Paris 06, 75005 Paris, France
- Chimie ParisTech, Laboratoire Charles Friedel (LCF), 75005 Paris, France
- CNRS, UMR 7223, 75005 Paris, France
| | - Michel J. G. Minier
- Chimie ParisTech, Laboratoire Charles Friedel (LCF), 75005 Paris, France
- CNRS, UMR 7223, 75005 Paris, France
| | - Michaël Tatoulian
- Chimie ParisTech, Laboratoire de Génie des Procédés Plasma et Traitements de Surface (LGPPTS), EA 3492, 75005 Paris, France
- UPMC Univ Paris 06, 75005 Paris, France
| | - Mohamed M. Chehimi
- Interfaces, Traitements, Organisation & Dynamique des Systèmes (ITODYS Lab), University Paris Diderot & CNRS, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Farzaneh Arefi-Khonsari
- Chimie ParisTech, Laboratoire de Génie des Procédés Plasma et Traitements de Surface (LGPPTS), EA 3492, 75005 Paris, France
- UPMC Univ Paris 06, 75005 Paris, France
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Wu XL, Xiong SJ, Zhu J, Wang J, Shen JC, Chu PK. Identification of surface structures on 3C-SiC nanocrystals with hydrogen and hydroxyl bonding by photoluminescence. NANO LETTERS 2009; 9:4053-4060. [PMID: 19894694 DOI: 10.1021/nl902226u] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
SiC nanocrystals (NCs) exhibit unique surface chemistry and possess special properties. This provides the opportunity to design suitable surface structures by terminating the surface dangling bonds with different atoms thereby boding well for practical applications. In this article, we report the photoluminescence properties of 3C-SiC NCs in water suspensions with different pH values. Besides a blue band stemming from the quantum confinement effect, the 3C-SiC NCs show an additional photoluminescence band at 510 nm when the excitation wavelengths are longer than 350 nm. Its intensity relative to the blue band increases with the excitation wavelength. The 510 nm band appears only in acidic suspensions but not in alkaline ones. Fourier transform infrared, X-ray photoelectron spectroscopy, and X-ray absorption near-edge structure analyses clearly reveal that the 3C-SiC NCs in the water suspension have Si-H and Si-OH bonds on their surface, implying that water molecules only react with a Si-terminated surface. First-principle calculations suggest that the additional 510 nm band arises from structures induced by H(+) and OH(-) dissociated from water and attached to Si dimers on the modified (001) Si-terminated portion of the NCs. The size requirement is consistent with the observation that the 510 nm band can only be observed when the excitation wavelengths are relatively large, that is, excitation of bigger NCs.
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Affiliation(s)
- X L Wu
- National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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9
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Abstract
Abstract
Biosensors can be excellent analytical tools for monitoring programs working to implement legislation. In this article, biosensors for environmental analysis and monitoring are extensively reviewed. Examples of biosensors for the most important families of envi-ronmental pollutants, including some commercial devices, are presented. Finally, future trends in biosensor development are discussed. In this context, bioelectronics, nanotechnology, miniaturization, and especially biotechnology seem to be growing areas that will have a marked influence on the development of new biosensing strategies in the next future.
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Ludden MJW, Li X, Greve J, van Amerongen A, Escalante M, Subramaniam V, Reinhoudt DN, Huskens J. Assembly of Bionanostructures onto β-Cyclodextrin Molecular Printboards for Antibody Recognition and Lymphocyte Cell Counting. J Am Chem Soc 2008; 130:6964-73. [DOI: 10.1021/ja078109v] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manon J. W. Ludden
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Xiao Li
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Jan Greve
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Aart van Amerongen
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Maryana Escalante
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Vinod Subramaniam
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - David N. Reinhoudt
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group and Laboratory of Biophysical Engineering, MESA+ Institute for Nanotechnology and Institute for Biomedical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, and Agrotechnology & Food Innovations, Wageningen University, Wageningen, The Netherlands
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11
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Ludden MJW, Ling XY, Gang T, Bula WP, Gardeniers HJGE, Reinhoudt DN, Huskens J. Multivalent binding of small guest molecules and proteins to molecular printboards inside microchannels. Chemistry 2008; 14:136-42. [PMID: 18000928 DOI: 10.1002/chem.200701250] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Beta-Cyclodextrin (beta-CD) monolayers have been immobilized in microchannels. The host-guest interactions on the beta-CD monolayers inside the channels were comparable to the interactions on beta-CD monolayers on planar surfaces, and a divalent fluorescent guest attached with a comparable binding strength. Proteins were attached to these monolayers inside microchannels in a selective manner by employing a strategy that uses streptavidin and orthogonal linker molecules. The design of the chip, which involved a large channel that splits into four smaller channels, allowed the channels to be addressed separately and led to the selective immobilization of antibodies. Experiments with labeled antibodies showed the selective immobilization of these antibodies in the separate channels.
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Affiliation(s)
- Manon J W Ludden
- Molecular Nanofabrication group MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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12
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Prosperi D, Morasso C, Tortora P, Monti D, Bellini T. Avidin Decorated Core–Shell Nanoparticles for Biorecognition Studies by Elastic Light Scattering. Chembiochem 2007; 8:1021-8. [PMID: 17503421 DOI: 10.1002/cbic.200600542] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this paper, a straightforward method based on elastic light scattering is shown to provide a sensitive and reliable tool for the quantitative determination of protein-ligand interactions that occur at the surface of suitably designed core-shell nanoparticles. The assay makes use of monodisperse nanocolloids that have minimal optical contrast with the aqueous environment. By properly coating the particles with avidin and oligo(ethylene glycol)-based amphiphiles, we developed a hybrid system that combines the availability of standard ligands with the necessary bioinvisibility towards the accidental adsorption of nonspecific macromolecules. This probe was employed to detect interactions between different kinds of biotinylated proteins, and it revealed high specificity and affinities in the low nanomolar range. In particular, we obtained an efficient avidin anchorage of biotinylated protein A on the surface of the nanoparticles, which we exploited as a functional probe for the rapid, quantitative, picomolar detection of human IgG antibodies. Overall, these light-scattering-based nanosensors appear as a simple and highly informative tool for proteomics studies.
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Affiliation(s)
- Davide Prosperi
- Istituto di Scienze e Tecnologie Molecolari, National Research Council (CNR), Via Golgi 19, 20133 Milano, Italy.
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Rodriguez-Mozaz S, Lopez de Alda MJ, Barceló D. Advantages and limitations of on-line solid phase extraction coupled to liquid chromatography–mass spectrometry technologies versus biosensors for monitoring of emerging contaminants in water. J Chromatogr A 2007; 1152:97-115. [PMID: 17275010 DOI: 10.1016/j.chroma.2007.01.046] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 12/22/2006] [Accepted: 01/12/2007] [Indexed: 11/29/2022]
Abstract
On-line solid phase extraction (SPE) coupled to liquid chromatography-mass spectrometry (LC-MS) and biosensors are advanced technologies that have found increasing application in the analysis of environmental contaminants although their application to the determination of emerging contaminants (previously unknown or unrecognized pollutants) has been still limited. This review covers the most recent advances occurred in the areas of on-line SPE-LC-MS and biosensors, discusses and compares the main strengths and limitations of the two approaches, and examines their most relevant applications to the analysis of emerging contaminants in environmental waters. So far, the on-line configuration most frequently used has been SPE coupled to liquid chromatography-(tandem) mass spectrometry. Sorbents used for on-line SPE have included both traditional (alkyl-bonded silicas and polymers) and novel (restricted access materials (RAMs), molecularly imprinted synthetic polymers (MIPs), and immobilized receptors or antibodies (immunosorbents) materials. The biosensor technologies most frequently applied have been based on the use of antibodies and, to a lesser extent, enzymes, bacteria, receptors and DNA as recognition elements, and the use of optical and electrochemical transducing elements. Emerging contaminants investigated by means of these two techniques have included pharmaceuticals, endocrine disrupting compounds such as estrogens, alkylphenols and bisphenol A, pesticides transformation products, disinfection by-products, and bacterial toxins and mycotoxins, among others. Both techniques offer advantageous, and frequently comparable, features such as high sensitivity and selectivity, minimum sample manipulation, and automation. Biosensors are, in addition, relatively cheap and fast, which make them ideally suited for routine testing and screening of samples; however, in most cases, they can not compete yet with on-line SPE procedures in terms of accuracy, reproducibility, reliability (confirmation) of results, and capacity for multi-analyte determination.
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Affiliation(s)
- Sara Rodriguez-Mozaz
- Department of Environmental Chemistry, IIQAB-CSIC, C/Jordi Girona 18-26, 08034 Barcelona, Spain
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Ateh DD, Navsaria HA, Vadgama P. Polypyrrole-based conducting polymers and interactions with biological tissues. J R Soc Interface 2007; 3:741-52. [PMID: 17015302 PMCID: PMC1885362 DOI: 10.1098/rsif.2006.0141] [Citation(s) in RCA: 252] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Polypyrrole (PPy) is a conjugated polymer that displays particular electronic properties including conductivity. In biomedical applications, it is usually electrochemically generated with the incorporation of any anionic species including also negatively charged biological macromolecules such as proteins and polysaccharides to give composite materials. In biomedical research, it has mainly been assessed for its role as a reporting interface in biosensors. However, there is an increasing literature on the application of PPy as a potentially electrically addressable tissue/cell support substrate. Here, we review studies that have considered such PPy based conducting polymers in direct contact with biological tissues and conclude that due to its versatile functional properties, it could contribute to a new generation of biomaterials.
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Affiliation(s)
- D D Ateh
- IRC in Biomedical Materials, Queen Mary University of London, London E14NS, UK.
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Ludden MJW, Péter M, Reinhoudt DN, Huskens J. Attachment of streptavidin to beta-cyclodextrin molecular printboards via orthogonal host-guest and protein-ligand interactions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2006; 2:1192-202. [PMID: 17193589 DOI: 10.1002/smll.200600147] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Streptavidin (SAv) is attached to beta-cyclodextrin (beta-CD) self-assembled monolayers (SAMs) via orthogonal host-guest and SAv-biotin interactions. The orthogonal linkers consist of a biotin functionality for binding to SAv and adamantyl functionalities for host-guest interactions at beta-CD SAMs. SAv complexed to excess monovalent linker in solution and then attached to a beta-CD SAM could be removed by rinsing with a 10 mM beta-CD solution. When SAv was attached to the beta-CD SAM via the divalent linker, it was impossible to remove SAv from the surface by the same rinsing procedure. This is interpreted by assuming that two SAv binding pockets are oriented towards the beta-CD SAM resulting in (labile) divalent and (stable) tetravalent beta-CD-adamantyl interactions for the mono- and divalent linkers, respectively. This was confirmed by experiments at varying beta-CD concentrations. When the [linker]/[SAv] ratio is reduced, a clear trend in the divalent-linker case is seen: the less linker the more protein could be removed from the surface. It is proven that the orthogonality of the binding motifs and the stability of the divalent linker at the beta-CD SAM allows the stepwise assembly of the complex at the beta-CD SAM by first adsorbing the linker, followed by SAv. This stepwise assembly allows the controlled heterofunctionalization of surface-immobilized SAv.
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Affiliation(s)
- Manon J W Ludden
- Laboratory of Supramolecular Chemistry and Technology, MESA+Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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Haddour N, Chauvin J, Gondran C, Cosnier S. Photoelectrochemical Immunosensor for Label-Free Detection and Quantification of Anti-cholera Toxin Antibody. J Am Chem Soc 2006; 128:9693-8. [PMID: 16866523 DOI: 10.1021/ja062729z] [Citation(s) in RCA: 225] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We demonstrate herein a newly developed photoelectrochemical immunosensor for the determination of anti-cholera toxin antibody by using a photosensitive biotinylated polypyrrole film. The latter was generated by electro-oxidation of a biotinylated tris(bipyridyl) ruthenium(II) complex bearing pyrrole groups. The photoexcitation of this modified electrode potentiostated at 0.5 V vs SCE, in the presence of an oxidative quencher, pentaaminechloro cobalt(III) chloride (15 mM), led to a cathodic photocurrent. As a result of the affinity interactions, a layer of biotinylated cholera toxin was firmly bound to the functionalized polypyrrole film via avidin bridges. The resulting modified electrodes were tested as immunosensors for the detection of the corresponding antibody from 0 to 200 microg mL(-)(1). The antibody concentration was measured through the decrease in photocurrent intensity resulting from its specific binding onto the polymeric coating, the detection limit being 0.5 microg mL(-)(1).
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Affiliation(s)
- Naoufel Haddour
- Laboratoire d'Electrochimie Organique et de Photochimie Rédox (CNRS UMR 5630), Institut de Chimie Moléculaire de Grenoble FR CNRS 2607, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
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17
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Rodriguez-Mozaz S, Lopez de Alda MJ, Barceló D. Biosensors as useful tools for environmental analysis and monitoring. Anal Bioanal Chem 2006; 386:1025-41. [PMID: 16807703 DOI: 10.1007/s00216-006-0574-3] [Citation(s) in RCA: 195] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 04/23/2006] [Accepted: 05/22/2006] [Indexed: 10/24/2022]
Abstract
Recent advances in the development and application of biosensors for environmental analysis and monitoring are reviewed in this article. Several examples of biosensors developed for relevant environmental pollutants and parameters are briefly overviewed. Special attention is paid to the application of biosensors to real environmental samples, taking into consideration aspects such as sample pretreatment, matrix effects and validation of biosensor measurements. Current trends in biosensor development are also considered and commented on in this work. In this context, nanotechnology, miniaturisation, multi-sensor array development and, especially, biotechnology arise as fast-growing areas that will have a marked influence on the development of new biosensing strategies in the near future.
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Affiliation(s)
- Sara Rodriguez-Mozaz
- Department of Environmental Chemistry, IIQAB-CSIC, C/ Jordi Girona 18-26, 08034, Barcelona, Spain.
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Chen Z, Salmain M, Pradier CM, Fischer-Durand N, Pailleret A, Bedioui F, Zanna S. Self-Assembling of Redox-Active Atrazine Poly(ethylenimine) Conjugates – Interfacial Electrochemical and Spectroscopic Characterization. ELECTROANAL 2006. [DOI: 10.1002/elan.200503451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Luderer F, Walschus U. Immobilization of Oligonucleotides for Biochemical Sensing by Self-Assembled Monolayers: Thiol-Organic Bonding on Gold and Silanization on Silica Surfaces. Top Curr Chem (Cham) 2005. [DOI: 10.1007/128_003] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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Cicero G, Catellani A, Galli G. Atomic control of water interaction with biocompatible surfaces: the case of SiC(001). PHYSICAL REVIEW LETTERS 2004; 93:016102. [PMID: 15323996 DOI: 10.1103/physrevlett.93.016102] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2004] [Indexed: 05/24/2023]
Abstract
The interaction of water with Si- and C- terminated beta-SiC(001) surfaces was investigated by means of ab initio molecular dynamics simulations. Irrespective of coverage, varied from 1/4 to 1 monolayer, we found that water dissociates on the Si-terminated surface, substantially modifying the clean surface reconstruction, while the C-terminated surface is nonreactive and hydrophobic. Based on our results, we propose that STM images and photoemission experiments may detect specific changes induced by water on both the structural and electronic properties of SiC(001) surfaces.
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Affiliation(s)
- Giancarlo Cicero
- INFM & Physics Department, Torino Polytechnic, C. Duca degli Abruzzi, 24, I-10129 Torino, Italy.
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Kowalczyńska HM, Inkielman M, Nowak-Wyrzykowska M, Stołowska L, Doroszewski J. Interaction of L1210 cells with sulfonated polystyrene in the absence of serum: adhesion and three-dimensional cell shape. Colloids Surf B Biointerfaces 2003. [DOI: 10.1016/s0927-7765(03)00086-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
The worldwide emergence of nanoscale science and engineering was marked by the announcement of the National Nanotechnology Initiative (NNI) in January 2000. Recent research on biosystems at the nanoscale has created one of the most dynamic science and technology domains at the confluence of physical sciences, molecular engineering, biology, biotechnology and medicine. This domain includes better understanding of living and thinking systems, revolutionary biotechnology processes, the synthesis of new drugs and their targeted delivery, regenerative medicine, neuromorphic engineering and developing a sustainable environment. Nanobiosystems research is a priority in many countries and its relevance within nanotechnology is expected to increase in the future.
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Affiliation(s)
- Mihail C Roco
- National Science Foundation, Room 505, 4201 Wilson Blvd, Arlington, VA 22230, USA.
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Adsorption of glucose oxidase into lipid monolayers: effect of a lipid headgroup charge. Colloids Surf B Biointerfaces 2003. [DOI: 10.1016/s0927-7765(02)00181-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Li L, Chen S, Oh S, Jiang S. In situ single-molecule detection of antibody-antigen binding by tapping-mode atomic force microscopy. Anal Chem 2002; 74:6017-22. [PMID: 12498197 DOI: 10.1021/ac0258148] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We performed in situ detection of specific and nonspecific binding during immunoreaction on surfaces at the same location before and after analyte was injected using tapping-mode atomic force microscopy (TM-AFM) in liquid and demonstrated the ability of TM-AFM to monitor the occurrence of single-molecule binding events and to distinguish nonspecific from specific binding by examining topographical change. Two antigen/antibody pairs were investigated: chorionic gonadotropin (hCG)/mouse monoclonal anti-hCG and goat IgG (anti-intact hCG)/ mouse monoclonal anti-goat IgG. Antibody (or antigen) molecules were covalently immobilized on uniform mixed self-assembled monolayers (SAMs) terminated with carboxylic acid and hydroxyl groups. Mixed SAMs allow the control of the density of immobilized antibody (or antigen) on surfaces to achieve the detection of individual antigens, antibodies, and antigen/antibody complexes. This in situ TM-AFM-based detection method allows the single-molecule detection of antigen/antibody binding under near-physiological environment and the distinction of nonspecific from specific binding. It could be extended into a microarray.
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Affiliation(s)
- Lingyan Li
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA
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