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Redondo-Gómez C, Parreira P, Martins MCL, Azevedo HS. Peptide-based self-assembled monolayers (SAMs): what peptides can do for SAMs and vice versa. Chem Soc Rev 2024; 53:3714-3773. [PMID: 38456490 DOI: 10.1039/d3cs00921a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Self-assembled monolayers (SAMs) represent highly ordered molecular materials with versatile biochemical features and multidisciplinary applications. Research on SAMs has made much progress since the early begginings of Au substrates and alkanethiols, and numerous examples of peptide-displaying SAMs can be found in the literature. Peptides, presenting increasing structural complexity, stimuli-responsiveness, and biological relevance, represent versatile functional components in SAMs-based platforms. This review examines the major findings and progress made on the use of peptide building blocks displayed as part of SAMs with specific functions, such as selective cell adhesion, migration and differentiation, biomolecular binding, advanced biosensing, molecular electronics, antimicrobial, osteointegrative and antifouling surfaces, among others. Peptide selection and design, functionalisation strategies, as well as structural and functional characteristics from selected examples are discussed. Additionally, advanced fabrication methods for dynamic peptide spatiotemporal presentation are presented, as well as a number of characterisation techniques. All together, these features and approaches enable the preparation and use of increasingly complex peptide-based SAMs to mimic and study biological processes, and provide convergent platforms for high throughput screening discovery and validation of promising therapeutics and technologies.
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Affiliation(s)
- Carlos Redondo-Gómez
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Paula Parreira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - M Cristina L Martins
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 4050-313 Porto, Portugal
| | - Helena S Azevedo
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
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2
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Martínez-Miguel M, Castellote-Borrell M, Köber M, Kyvik AR, Tomsen-Melero J, Vargas-Nadal G, Muñoz J, Pulido D, Cristóbal-Lecina E, Passemard S, Royo M, Mas-Torrent M, Veciana J, Giannotti MI, Guasch J, Ventosa N, Ratera I. Hierarchical Quatsome-RGD Nanoarchitectonic Surfaces for Enhanced Integrin-Mediated Cell Adhesion. ACS APPLIED MATERIALS & INTERFACES 2022; 14:48179-48193. [PMID: 36251059 PMCID: PMC9614722 DOI: 10.1021/acsami.2c10497] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
The synthesis and study of the tripeptide Arg-Gly-Asp (RGD), the binding site of different extracellular matrix proteins, e.g., fibronectin and vitronectin, has allowed the production of a wide range of cell adhesive surfaces. Although the surface density and spacing of the RGD peptide at the nanoscale have already shown a significant influence on cell adhesion, the impact of its hierarchical nanostructure is still rather unexplored. Accordingly, a versatile colloidal system named quatsomes, based on fluid nanovesicles formed by the self-assembling of cholesterol and surfactant molecules, has been devised as a novel template to achieve hierarchical nanostructures of the RGD peptide. To this end, RGD was anchored on the vesicle's fluid membrane of quatsomes, and the RGD-functionalized nanovesicles were covalently anchored to planar gold surfaces, forming a state of quasi-suspension, through a long poly(ethylene glycol) (PEG) chain with a thiol termination. An underlying self-assembled monolayer (SAM) of a shorter PEG was introduced for vesicle stabilization and to avoid unspecific cell adhesion. In comparison with substrates featuring a homogeneous distribution of RGD peptides, the resulting hierarchical nanoarchitectonic dramatically enhanced cell adhesion, despite lower overall RGD molecules on the surface. The new versatile platform was thoroughly characterized using a multitechnique approach, proving its enhanced performance. These findings open new methods for the hierarchical immobilization of biomolecules on surfaces using quatsomes as a robust and novel tissue engineering strategy.
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Affiliation(s)
- Marc Martínez-Miguel
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | | | - Mariana Köber
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Adriana R. Kyvik
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Judit Tomsen-Melero
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Guillem Vargas-Nadal
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
| | - Jose Muñoz
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
| | - Daniel Pulido
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Unidad
de Péptidos, UB, Unidad asociada
al CSIC por el IQAC, Barcelona 08028, Spain
| | - Edgar Cristóbal-Lecina
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Unidad
de Péptidos, UB, Unidad asociada
al CSIC por el IQAC, Barcelona 08028, Spain
| | - Solène Passemard
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
| | - Miriam Royo
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Institut
de Química Avançada de Catalunya (IQAC−CSIC), Barcelona 08034, Spain
| | - Marta Mas-Torrent
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Jaume Veciana
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Marina I. Giannotti
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Nanoprobes
and Nanoswitches group, Institute for Bioengineering of Catalonia
(IBEC), The Barcelona Institute of Science
and Technology (BIST), Barcelona 08028, Spain
- Departament
de Ciència dels Materials i Química Física, Universitat de Barcelona, Barcelona 08028, Spain
| | - Judith Guasch
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
- Dynamic Biomimetics
for Cancer Immunotherapy, Max Planck Partner
Group, ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Nora Ventosa
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
| | - Imma Ratera
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra 08193, Spain
- Biomedical
Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid 28029, Spain
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3
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Tailoring ZE21B Alloy with Nature-Inspired Extracellular Matrix Secreted by Micro-Patterned Smooth Muscle Cells and Endothelial Cells to Promote Surface Biocompatibility. Int J Mol Sci 2022; 23:ijms23063180. [PMID: 35328601 PMCID: PMC8950948 DOI: 10.3390/ijms23063180] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/09/2022] [Accepted: 03/12/2022] [Indexed: 12/16/2022] Open
Abstract
Delayed surface endothelialization is a bottleneck that restricts the further application of cardiovascular stents. It has been reported that the nature-inspired extracellular matrix (ECM) secreted by the hyaluronic acid (HA) micro-patterned smooth muscle cells (SMC) and endothelial cells (EC) can significantly promote surface endothelialization. However, this ECM coating obtained by decellularized method (dECM) is difficult to obtain directly on the surface of degradable magnesium (Mg) alloy. In this study, the method of obtaining bionic dECM by micro-patterning SMC/EC was further improved, and the nature-inspired ECM was prepared onto the Mg-Zn-Y-Nd (ZE21B) alloy surface by self-assembly. The results showed that the ECM coating not only improved surface endothelialization of ZE21B alloy, but also presented better blood compatibility, anti-hyperplasia, and anti-inflammation functions. The innovation and significance of the study is to overcome the disadvantage of traditional dECM coating and further expand the application of dECM coating to the surface of degradable materials and materials with different shapes.
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Carlson S, Becker M, Brünig FN, Ataka K, Cruz R, Yu L, Tang P, Kanduč M, Haag R, Heberle J, Makki H, Netz RR. Hydrophobicity of Self-Assembled Monolayers of Alkanes: Fluorination, Density, Roughness, and Lennard-Jones Cutoffs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13846-13858. [PMID: 34787431 DOI: 10.1021/acs.langmuir.1c02187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The interplay of fluorination and structure of alkane self-assembled monolayers and how these affect hydrophobicity are explored via molecular dynamics simulations, contact angle goniometry, and surface-enhanced infrared absorption spectroscopy. Wetting coefficients are found to grow linearly in the monolayer density for both alkane and perfluoroalkane monolayers. The larger contact angles of monolayers of perfluorinated alkanes are shown to be primarily caused by their larger molecular volume, which leads to a larger nearest-neighbor grafting distance and smaller tilt angle. Increasing the Lennard-Jones force cutoff in simulations is found to increase hydrophilicity. Specifically, wetting coefficients scale like the inverse square of the cutoff, and when extrapolated to the infinite cutoff limit, they yield contact angles that compare favorably to experimental values. Nanoscale roughness is also found to reliably increase monolayer hydrophobicity, mostly via the reduction of the entropic part of the work of adhesion. Analysis of depletion lengths shows that droplets on nanorough surfaces partially penetrate the surface, intermediate between Wenzel and Cassie-Baxter states.
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Affiliation(s)
- Shane Carlson
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Maximilian Becker
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Florian N Brünig
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Kenichi Ataka
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Rubén Cruz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Leixiao Yu
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Peng Tang
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Matej Kanduč
- Department of Theoretical Physics, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Rainer Haag
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Joachim Heberle
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Hesam Makki
- Polymer and Color Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran 15875-4413, Iran
| | - Roland R Netz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
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5
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Effect of linking arm hydrophilic/hydrophobic nature, length and end-group on the conformation and the RGD accessibility of surface-immobilized fibronectin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 107:110335. [DOI: 10.1016/j.msec.2019.110335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 06/03/2019] [Accepted: 10/16/2019] [Indexed: 12/30/2022]
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6
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Surface-Immobilized Biomolecules. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00036-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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7
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8
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Bugga P, Mrksich M. Sequential Photoactivation of Self-Assembled Monolayers to Direct Cell Adhesion and Migration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5937-5943. [PMID: 30943037 PMCID: PMC8262134 DOI: 10.1021/acs.langmuir.8b04203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Dynamic substrates for cell culture control the spatial and temporal presentation of extracellular matrix ligands that interact with adherent cells. This paper reports a photoactive surface chemistry that can repeatedly activate regions of the substrate for cell adhesion, spreading, and migration. The approach uses self-assembled monolayers presenting the integrin ligand RGD that is caged with a nitrophenyl-based photoprotecting group. The group is also modified with a maltoheptaose oligosaccharide to prevent nonspecific protein adsorption and cell attachment. The peptide is uncaged when irradiated with a laser source at 405 nm on a microscope to reveal micron-size regions for single cell attachment. This method is applied to studies of gap junction-mediated communication between two neighboring cells and requires the patterning of an initial receiver cell population and then the patterning of a second sender population to give a culture wherein each pair of cells are separated by 30 μm. Finally, activation of the region between the cells permits cell-cell contact and gap junction assembly between the sender and receiver cells. This example demonstrates the broad relevance of this method to studying complex phenotypes in cell culture.
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Affiliation(s)
- Pradeep Bugga
- Department of Chemistry, Department of Biomedical Engineering, and Department of Cell and Molecular Biology, Northwestern University, Evanston, Illinois 60208, United States
| | - Milan Mrksich
- Department of Chemistry, Department of Biomedical Engineering, and Department of Cell and Molecular Biology, Northwestern University, Evanston, Illinois 60208, United States
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9
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Pang X, Li W, Landwehr E, Yuan Y, Wang W, Azevedo HS. Mimicking the endothelial glycocalyx through the supramolecular presentation of hyaluronan on patterned surfaces. Faraday Discuss 2019; 219:168-182. [DOI: 10.1039/c9fd00015a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Self-assembled monolayers of hyaluronan (HA)-binding peptide allow immobilization of HA for studying the function of the endothelial glycocalyx.
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Affiliation(s)
- Xinqing Pang
- School of Engineering and Materials Science
- Queen Mary University of London
- London E1 4NS
- UK
- Institute of Bioengineering
| | - Weiqi Li
- School of Engineering and Materials Science
- Queen Mary University of London
- London E1 4NS
- UK
- Institute of Bioengineering
| | - Eliane Landwehr
- Department of Chemistry
- University of Konstanz
- Konstanz 78464
- Germany
| | - Yichen Yuan
- School of Engineering and Materials Science
- Queen Mary University of London
- London E1 4NS
- UK
- Institute of Bioengineering
| | - Wen Wang
- School of Engineering and Materials Science
- Queen Mary University of London
- London E1 4NS
- UK
- Institute of Bioengineering
| | - Helena S. Azevedo
- School of Engineering and Materials Science
- Queen Mary University of London
- London E1 4NS
- UK
- Institute of Bioengineering
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10
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Cimmino C, Rossano L, Netti PA, Ventre M. Spatio-Temporal Control of Cell Adhesion: Toward Programmable Platforms to Manipulate Cell Functions and Fate. Front Bioeng Biotechnol 2018; 6:190. [PMID: 30564573 PMCID: PMC6288377 DOI: 10.3389/fbioe.2018.00190] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 11/21/2018] [Indexed: 01/06/2023] Open
Abstract
Biophysical and biochemical signals of material surfaces potently regulate cell functions and fate. In particular, micro- and nano-scale patterns of adhesion signals can finely elicit and affect a plethora of signaling pathways ultimately affecting gene expression, in a process known as mechanotransduction. Our fundamental understanding of cell-material signals interaction and reaction is based on static culturing platforms, i.e., substrates exhibiting signals whose configuration is time-invariant. However, cells in-vivo are exposed to arrays of biophysical and biochemical signals that change in time and space and the way cells integrate these might eventually dictate their behavior. Advancements in fabrication technologies and materials engineering, have recently enabled the development of culturing platforms able to display patterns of biochemical and biophysical signals whose features change in time and space in response to external stimuli and according to selected programmes. These dynamic devices proved to be particularly helpful in shedding light on how cells adapt to a dynamic microenvironment or integrate spatio-temporal variations of signals. In this work, we present the most relevant findings in the context of dynamic platforms for controlling cell functions and fate in vitro. We place emphasis on the technological aspects concerning the fabrication of platforms displaying micro- and nano-scale dynamic signals and on the physical-chemical stimuli necessary to actuate the spatio-temporal changes of the signal patterns. In particular, we illustrate strategies to encode material surfaces with dynamic ligands and patterns thereof, topographic relieves and mechanical properties. Additionally, we present the most effective, yet cytocompatible methods to actuate the spatio-temporal changes of the signals. We focus on cell reaction and response to dynamic changes of signal presentation. Finally, potential applications of this new generation of culturing systems for in vitro and in vivo applications, including regenerative medicine and cell conditioning are presented.
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Affiliation(s)
- Chiara Cimmino
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy
- Center for Advanced Biomaterials for Healthcare@CRIB, Fondazione Istituto Italiano di Tecnologia, Naples, Italy
| | - Lucia Rossano
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy
- Center for Advanced Biomaterials for Healthcare@CRIB, Fondazione Istituto Italiano di Tecnologia, Naples, Italy
| | - Paolo Antonio Netti
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy
- Center for Advanced Biomaterials for Healthcare@CRIB, Fondazione Istituto Italiano di Tecnologia, Naples, Italy
| | - Maurizio Ventre
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy
- Center for Advanced Biomaterials for Healthcare@CRIB, Fondazione Istituto Italiano di Tecnologia, Naples, Italy
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Abstract
The interactions of adherent cells with their insoluble extracellular matrices are complex and challenging to study in the laboratory. Approaches from interface science have been important to preparing models of the biological matrix wherein discreet ligands are immobilized and interact with cellular receptors. A recent theme has been to develop dynamic substrates, where the activities of immobilized ligands can be modulated in real-time during cell culture. This short opinion reviews the strategies to manipulate ligand activity, highlights recent work that has advanced the field and discusses the applications that have been enabled. This work suggests that dynamic substrates will continue to find important uses in basic and applied biointerfaces.
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Affiliation(s)
- Pradeep Bugga
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208 United States
| | - Milan Mrksich
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208 United States
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12
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Li S, Mrksich M. An Unusual Salt Effect in an Interfacial Nucleophilic Substitution Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6713-6718. [PMID: 29772172 DOI: 10.1021/acs.langmuir.8b00875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This paper reports a kinetic characterization of the interfacial reaction of N-methylpyrrolidine with a self-assembled monolayer presenting an iodoalkyl group. SAMDI (self-assembled monolayers for matrix-assisted laser desorption/ionization) mass spectrometry was used to determine the extent of reaction for monolayers that were treated with a range of concentrations of the nucleophile for a range of times. These data revealed a second-order rate constant for the reaction that was approximately 100-fold greater than that for the analogous solution-phase reaction. However, addition of sodium iodide to the reaction mixture resulted in a 7-fold decrease in the reaction rate. Addition of bromide and chloride salts also gave slower rate constants for the reaction, but only at 100- and 1000-fold higher concentrations than was observed with iodide, respectively. The corresponding solution-phase reactions, by contrast, had rate constants that were unaffected by the concentration of halide salts. This work provides a well-characterized example illustrating the extent to which the kinetics and properties of an interfacial reaction can depart substantially from their better-understood solution-phase counterparts.
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Affiliation(s)
- Shuheng Li
- Departments of Chemistry and Biomedical Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Milan Mrksich
- Departments of Chemistry and Biomedical Engineering , Northwestern University , Evanston , Illinois 60208 , United States
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13
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Potent laminin-inspired antioxidant regenerative dressing accelerates wound healing in diabetes. Proc Natl Acad Sci U S A 2018; 115:6816-6821. [PMID: 29891655 DOI: 10.1073/pnas.1804262115] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The successful treatment of chronic dermal wounds, such as diabetic foot ulcers (DFU), depends on the development of safe, effective, and affordable regenerative tools that the surgeon can rely on to promote wound closure. Although promising, strategies that involve cell-based therapies and the local release of exogenous growth factors are costly, require very long development times, and result in modest improvements in patient outcome. We describe the development of an antioxidant shape-conforming regenerative wound dressing that uses the laminin-derived dodecapeptide A5G81 as a potent tethered cell adhesion-, proliferation-, and haptokinesis-inducing ligand to locally promote wound closure. A5G81 immobilized within a thermoresponsive citrate-based hydrogel facilitates integrin-mediated spreading, migration, and proliferation of dermal and epidermal cells, resulting in faster tissue regeneration in diabetic wounds. This peptide-hydrogel system represents a paradigm shift in dermoconductive and dermoinductive strategies for treating DFU without the need for soluble biological or pharmacological factors.
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Ishiwari F, Shoji Y, Fukushima T. Supramolecular scaffolds enabling the controlled assembly of functional molecular units. Chem Sci 2018; 9:2028-2041. [PMID: 29719683 PMCID: PMC5896469 DOI: 10.1039/c7sc04340f] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 01/19/2018] [Indexed: 12/14/2022] Open
Abstract
To assemble functional molecular units into a desired structure while controlling positional and orientational order is a key technology for the development of high-performance organic materials that exhibit electronic, optoelectronic, biological and even dynamic functions. For this purpose, we cannot rely simply on the inherent self-assembly properties of the target functional molecular units, since it is difficult to predict, based solely on the molecular structure, what structure will be achieved upon assembly. To address this issue, it would be useful to employ molecular building blocks with self-assembly structures that can be clearly predicted and defined, to make target molecular units assemble into a desired structure. To date, various motifs of molecular assemblies, polymers, discrete and/or three-dimensional metal-organic complexes, nanoparticles and metal/metal oxide substrates have been developed to create materials with particular structures and dimensionalities. In this perspective, we define such assembly motifs as "supramolecular scaffolds". The structure of supramolecular scaffolds can be classified in terms of dimensionality, and they range in size from nano- to macroscopic scales. Functional molecular units, when attached to supramolecular scaffolds either covalently or non-covalently, can be assembled into specific structures, thus enabling the exploration of new properties, which cannot be achieved with the target molecular units alone. Through the classification and overview of reported examples, we shed new light on supramolecular scaffolds for the rational design of organic and polymeric materials.
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Affiliation(s)
- Fumitaka Ishiwari
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
| | - Yoshiaki Shoji
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science , Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku , Yokohama 226-8503 , Japan .
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15
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Tew LS, Ching JY, Ngalim SH, Khung YL. Driving mesenchymal stem cell differentiation from self-assembled monolayers. RSC Adv 2018; 8:6551-6564. [PMID: 35540392 PMCID: PMC9078311 DOI: 10.1039/c7ra12234a] [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: 11/08/2017] [Accepted: 01/27/2018] [Indexed: 12/26/2022] Open
Abstract
The utilization of self-assembled monolayer (SAM) systems to direct Mesenchymal Stem Cell (MSC) differentiation has been covered in the literature for years, but finding a general consensus pertaining to its exact role over the differentiation of stem cells had been rather challenging. Although there are numerous reports on surface functional moieties activating and inducing differentiation, the results are often different between reports due to the varying surface conditions, such as topography or surface tension. Herein, in view of the complexity of the subject matter, we have sought to catalogue the recent developments around some of the more common functional groups on predominantly hard surfaces and how these chemical groups may influence the overall outcome of the mesenchymal stem cells (MSC) differentiation so as to better establish a clearer underlying relationship between stem cells and their base substratum interactions. Graphical illustration showing the functional groups that drive MSC differentiation without soluble bioactive cues within the first 14 days.![]()
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Affiliation(s)
- L. S. Tew
- Regenerative Medicine Cluster
- Advanced Medical and Dental Institute (AMDI)
- Universiti Sains Malaysia
- Malaysia
| | - J. Y. Ching
- Institute of Biological Science and Technology
- China Medical University
- Taichung
- Republic of China
| | - S. H. Ngalim
- Regenerative Medicine Cluster
- Advanced Medical and Dental Institute (AMDI)
- Universiti Sains Malaysia
- Malaysia
| | - Y. L. Khung
- Institute of New Drug Development
- China Medical University
- Taichung
- Republic of China
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16
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Sankaran S, Cavatorta E, Huskens J, Jonkheijm P. Cell Adhesion on RGD-Displaying Knottins with Varying Numbers of Tryptophan Amino Acids to Tune the Affinity for Assembly on Cucurbit[8]uril Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8813-8820. [PMID: 28514856 PMCID: PMC5588093 DOI: 10.1021/acs.langmuir.7b00702] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/08/2017] [Indexed: 06/07/2023]
Abstract
Cell adhesion is studied on multivalent knottins, displaying RGD ligands with a high affinity for integrin receptors, that are assembled on CB[8]-methylviologen-modified surfaces. The multivalency in the knottins stems from the number of tryptophan amino acid moieties, between 0 and 4, that can form a heteroternary complex with cucurbit[8]uril (CB[8]) and surface-tethered methylviologen (MV2+). The binding affinity of the knottins with CB[8] and MV2+ surfaces was evaluated using surface plasmon resonance spectroscopy. Specific binding occurred, and the affinity increased with the valency of tryptophans on the knottin. Additionally, increased multilayer formation was observed, attributed to homoternary complex formation between tryptophan residues of different knottins and CB[8]. Thus, we were able to control the surface coverage of the knottins by valency and concentration. Cell experiments with mouse myoblast (C2C12) cells on the self-assembled knottin surfaces showed specific integrin recognition by the RGD-displaying knottins. Moreover, cells were observed to elongate more on the supramolecular knottin surfaces with a higher valency, and in addition, more pronounced focal adhesion formation was observed on the higher-valency knottin surfaces. We attribute this effect to the enhanced coverage and the enhanced affinity of the knottins in their interaction with the CB[8] surface. Collectively, these results are promising for the development of biomaterials including knottins via CB[8] ternary complexes for tunable interactions with cells.
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Affiliation(s)
- Shrikrishnan Sankaran
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology and Bioinspired Molecular Engineering Laboratory, MIRA
Institute for Biomedical Technology and Technical Medicine and Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, 7500 AE Enschede, The Netherlands
| | - Emanuela Cavatorta
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology and Bioinspired Molecular Engineering Laboratory, MIRA
Institute for Biomedical Technology and Technical Medicine and Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, 7500 AE Enschede, The Netherlands
| | - Jurriaan Huskens
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology and Bioinspired Molecular Engineering Laboratory, MIRA
Institute for Biomedical Technology and Technical Medicine and Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, 7500 AE Enschede, The Netherlands
| | - Pascal Jonkheijm
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology and Bioinspired Molecular Engineering Laboratory, MIRA
Institute for Biomedical Technology and Technical Medicine and Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology, Department
of Science and Technology, University of
Twente, 7500 AE Enschede, The Netherlands
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17
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De Leo F, Marega R, Corvaglia V, Tondo R, Lo Cicero M, Silvestrini S, Bonifazi D. Unfolding IGDQ Peptides for Engineering Motogenic Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7512-7528. [PMID: 28683199 DOI: 10.1021/acs.langmuir.6b04381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Extracellular matrix (ECM)-mimicking surfaces are pivotal tools in understanding adherent cell physiopathology. In this sense, we have recently reported on a discrete set of ECM-mimicking SAMs, among which only those exposing IGDQ peptide-alkanethiols sustain the adhesion of MDA-MB-231 cells by triggering FAK phosphorylation and peculiarly induce the migration of individual cancer cells on the subcentimeter scale. Starting from the experimentally observed relationship among the SAM composition, organization, and biological response, a systematic computational characterization aided in pinpointing the atomistic details through which specific composition and organization achieve the desired biological responsiveness. Specifically, the solvent, number and type of peptides, and presence or absence of surface fillers were accurately considered, creating representative model SAMs simulated by means of classical molecular dynamics (MD) with a view toward unravelling the experimental evidence, revealing how the conformational and structural features of these substrates dictate the specific motogenic responses. Through complementary experimental and computational investigations, it clearly emerges that there exists a distinct and precise mutual interaction among IGDQ-peptides, the surface fillers, and Au, which controls the structural properties of the ECM-mimicking SAMs and thus their motogenic potential.
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Affiliation(s)
- Federica De Leo
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Riccardo Marega
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Valentina Corvaglia
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Rodolfo Tondo
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
| | - Matteo Lo Cicero
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
| | - Simone Silvestrini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , V. Marzolo 1, 35131 Padova, Italy
| | - Davide Bonifazi
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
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18
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Ma D, Zhou N, Zhang T, Hu K, Ma X, Gu N. Photoresponsive smart hydrogel microsphere via host-guest interaction for 3D cell culture. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.073] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Camarero-Espinosa S, Cooper-White J. Tailoring biomaterial scaffolds for osteochondral repair. Int J Pharm 2017; 523:476-489. [DOI: 10.1016/j.ijpharm.2016.10.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/11/2016] [Accepted: 10/17/2016] [Indexed: 12/11/2022]
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20
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Cabezas M, Mirkin CA, Mrksich M. Nanopatterned Extracellular Matrices Enable Cell-Based Assays with a Mass Spectrometric Readout. NANO LETTERS 2017; 17:1373-1377. [PMID: 28120616 PMCID: PMC5501326 DOI: 10.1021/acs.nanolett.6b04176] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/24/2017] [Indexed: 05/27/2023]
Abstract
Cell-based assays are finding wider use in evaluating compounds in primary screens for drug development, yet it is still challenging to measure enzymatic activities as an end point in a cell-based assay. This paper reports a strategy that combines state-of-the-art cantilever free polymer pen lithography (PPL) with self-assembled monolayer laser desorption-ionization (SAMDI) mass spectrometry to guide cell localization and measure cellular enzymatic activities. Experiments are conducted with a 384 spot array, in which each spot is composed of ∼400 nanoarrays and each array has a 10 × 10 arrangement of 750 nm features that present extracellular matrix (ECM) proteins surrounded by an immobilized phosphopeptide. Cells attach to the individual nanoarrays, where they can be cultured and treated with small molecules, after which the media is removed and the cells are lysed. Phosphatase enzymes in the proximal lysate can then act on the immobilized phosphopeptide substrate to convert it to the dephosphorylated form. After the lysate is removed, the array is analyzed by SAMDI mass spectrometry to identify the extent of dephosphorylation and, therefore, the amount of enzyme activity in the cell. This novel approach of using nanopatterning to mediate cell adhesion and SAMDI to record enzyme activities in the proximal lysate will enable a broad range of cellular assays for applications in drug discovery and research not possible with conventional strategies.
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Affiliation(s)
- Maria
D. Cabezas
- Department of Chemistry and International Institute for Nanotechnology and Department of Biomedical
Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Chad A. Mirkin
- Department of Chemistry and International Institute for Nanotechnology and Department of Biomedical
Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Milan Mrksich
- Department of Chemistry and International Institute for Nanotechnology and Department of Biomedical
Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department
of Cell and Molecular Biology, Feinberg
School of Medicine, 303
East Chicago Avenue, Chicago, Illinois 60611, United
States
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21
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Li Y, Wang J, Xing J, Wang Y, Luo Y. Surface chemistry regulates the sensitivity and tolerability of osteoblasts to various magnitudes of fluid shear stress. J Biomed Mater Res A 2016; 104:2978-2991. [PMID: 27466082 DOI: 10.1002/jbm.a.35848] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 07/09/2016] [Accepted: 07/27/2016] [Indexed: 11/08/2022]
Abstract
Scaffolds provide a physical support for osteoblasts and act as the medium to transfer mechanical stimuli to cells. To verify our hypothesis that the surface chemistry of scaffolds regulates the perception of cells to mechanical stimuli, the sensitivity and tolerability of osteoblasts to fluid shear stress (FSS) of various magnitudes (5, 12, 20 dynes/cm2 ) were investigated on various surface chemistries (-OH, -CH3 , -NH2 ), and their follow-up effects on cell proliferation and differentiation were examined as well. The sensitivity was characterized by the release of adenosine triphosphate (ATP), nitric oxide (NO) and prostaglandin E2 (PGE2 ) while the tolerability was by cellular membrane integrity. The cell proliferation was characterized by S-phase cell fraction and the differentiation by ALP activity and ECM expression (fibronectin and type I collagen). As revealed, osteoblasts demonstrated higher sensitivity and lower tolerability on OH and CH3 surfaces, yet lower sensitivity and higher tolerability on NH2 surfaces. Observations on the focal adhesion formation, F-actin organization and cellular orientation before and after FSS exposure suggest that the potential mechanism lies in the differential control of F-actin organization and focal adhesion formation by surface chemistry, which further divergently mediates the sensitivity and tolerability of ROBs to FSS and the follow-up cell proliferation and differentiation. These findings are essentially valuable for design/selection of desirable surface chemistry to orchestrate with FSS stimuli, inducing appropriate cell responses and promoting bone formation. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2978-2991, 2016.
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Affiliation(s)
- Yan Li
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing, 400030, China.,Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing, 400030, China.,School of Pharmacy, Taizhou Polytechnic College, Taizhou, 225300, China
| | - Jinfeng Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing, 400030, China.,Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Juan Xing
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing, 400030, China.,Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Yuanliang Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing, 400030, China.,Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing, 400030, China
| | - Yanfeng Luo
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing, 400030, China. .,Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing, 400030, China.
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22
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Abdeen AA, Lee J, Kilian KA. Capturing extracellular matrix properties in vitro: Microengineering materials to decipher cell and tissue level processes. Exp Biol Med (Maywood) 2016; 241:930-8. [PMID: 27075930 PMCID: PMC4950351 DOI: 10.1177/1535370216644532] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Rapid advances in biology have led to the establishment of new fields with tremendous translational potential including regenerative medicine and immunoengineering. One commonality to these fields is the need to extract cells for manipulation in vitro; however, results obtained in laboratory cell culture will often differ widely from observations made in vivo. To more closely emulate native cell biology in the laboratory, designer engineered environments have proved a successful methodology to decipher the properties of the extracellular matrix that govern cellular decision making. Here, we present an overview of matrix properties that affect cell behavior, strategies for recapitulating important parameters in vitro, and examples of how these properties can affect cell and tissue level processes, with emphasis on leveraging these tools for immunoengineering.
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Affiliation(s)
- Amr A Abdeen
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Junmin Lee
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kristopher A Kilian
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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23
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Effect of micropatterned TiO2 nanotubes thin film on the deposition of endothelial extracellular matrix: For the purpose of enhancing surface biocompatibility. Biointerphases 2015; 10:04A302. [PMID: 26282700 DOI: 10.1116/1.4928304] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The vascular endothelial cells (EC) extracellular matrix (ECM) on the biomaterial surface can significantly improve the blood compatibility and cell compatibility of the cardiovascular materials. In the present study, two types of micropatterned TiO2 nanotubes surfaces (gronano and toponano) were fabricated on the titanium surface by photolithography and two-step anodizing technology, for the purpose of enhancing the deposition and loading ability of the EC ECM. The effect of the micropatterned nanotubes on EC ECM deposition and loading was investigated by qualitative and quantitative characterizations of type IV collagen (CoIV). The blood compatibility of the deposited ECM layers was evaluated by platelet adhesion and activation tests, and the endothelialization function of the deposited ECM layers was investigated by EC culture for 3 days. As a result, there was more CoIV on the toponano surface compared with the control. Meanwhile, the ECM loaded toponano (ECM/toponano) possessed better blood compatibility and better endothelialization than the control. This ECM loaded micro-/nanocomposite thin film was anticipated for the potential application of the surface modification of cardiovascular devices based on its excellent biocompatibility.
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24
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Rush MN, Coombs KE, Hedberg-Dirk EL. Surface chemistry regulates valvular interstitial cell differentiation in vitro. Acta Biomater 2015; 28:76-85. [PMID: 26428193 DOI: 10.1016/j.actbio.2015.09.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/28/2015] [Accepted: 09/26/2015] [Indexed: 11/27/2022]
Abstract
The primary driver for valvular calcification is the differentiation of valvular interstitial cells (VICs) into a diseased phenotype. However, the factors leading to the onset of osteoblastic-like VICs (obVICs) and resulting calcification are not fully understood. This study isolates the effect of substrate surface chemistry on in vitro VIC differentiation and calcified tissue formation. Using ω-functionalized alkanethiol self-assembled monolayers (SAMs) on gold [CH3 (hydrophobic), OH (hydrophilic), COOH (COO(-), negative at physiological pH), and NH2 (NH3(+), positive at physiological pH)], we have demonstrated that surface chemistry modulates VIC phenotype and calcified tissue deposition independent of osteoblastic-inducing media additives. Over seven days VICs exhibited surface-dependent differences in cell proliferation (COO(-)=NH3(+)>OH>CH3), morphology, and osteoblastic potential. Both NH3(+)and CH3-terminated SAMs promoted calcified tissue formation while COO(-)-terminated SAMs showed no calcification. VICs on NH3(+)-SAMs exhibited the most osteoblastic phenotypic markers through robust nodule formation, up-regulated osteocalcin and α-smooth muscle actin expression, and adoption of a round/rhomboid morphology indicative of osteoblastic differentiation. With the slowest proliferation, VICs on CH3-SAMs promoted calcified aggregate formation through cell detachment and increased cell death indicative of dystrophic calcification. Furthermore, induction of calcified tissue deposition on NH3(+) and CH3-SAMs was distinctly different than that of media induced osteoblastic VICs. These results demonstrate that substrate surface chemistry alters VIC behavior and plays an important role in calcified tissue formation. In addition, we have identified two novel methods of calcified VIC induction in vitro. Further study of these environments may yield new models for in vitro testing of therapeutics for calcified valve stenosis, although additional studies need to be conducted to correlate results to in vivo models. STATEMENT OF SIGNIFICANCE Valvular interstitial cell (VIC) differentiation and aortic valve calcification is associated with increased risk of mortality and onset of other cardiovascular disorders. This research examines effects of in vitro substrate surface chemistry on VIC differentiation and has led to the identification of two materials-based initiation mechanisms of osteoblastic-like calcified tissue formation independent of soluble signaling methods. Such findings are important for their potential to study signaling cascades responsible for valvular heart disease initiation and progression as well providing in vitro disease models for drug development. We have also identified a VIC activating in vitro environment that does not exhibit confluence induced nodule formation with promise for the development of tissue regenerating scaffolds.
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25
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26
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Sobers CJ, Wood SE, Mrksich M. A gene expression-based comparison of cell adhesion to extracellular matrix and RGD-terminated monolayers. Biomaterials 2015; 52:385-94. [PMID: 25818445 PMCID: PMC4379455 DOI: 10.1016/j.biomaterials.2015.02.045] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 02/03/2015] [Accepted: 02/06/2015] [Indexed: 01/08/2023]
Abstract
This work uses global gene expression analysis to compare the extent to which model substrates presenting peptide adhesion motifs mimic the use of conventional extracellular matrix protein coated substrates for cell culture. We compared the transcriptional activities of genes in cells that were cultured on matrix-coated substrates with those cultured on self-assembled monolayers presenting either a linear or cyclic RGD peptide. Cells adherent to cyclic RGD were most similar to those cultured on native ECM, while cells cultured on monolayers presenting the linear RGD peptide had transcriptional activities that were more similar to cells cultured on the uncoated substrates. This study suggests that biomaterials presenting the cyclic RGD peptide are substantially better mimics of extracellular matrix than are uncoated materials or materials presenting the common linear RGD peptide.
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Affiliation(s)
- Courtney J Sobers
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA; Department of Cell and Molecular Biology, Northwestern University, Chicago, IL 60611, USA
| | - Sarah E Wood
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Milan Mrksich
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA; Department of Cell and Molecular Biology, Northwestern University, Chicago, IL 60611, USA; Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA.
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27
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Li Y, Jiao Y, Li X, Guo Z. Improving the osteointegration of Ti6Al4V by zeolite MFI coating. Biochem Biophys Res Commun 2015; 460:151-6. [PMID: 25757911 DOI: 10.1016/j.bbrc.2015.02.157] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 02/26/2015] [Indexed: 10/23/2022]
Abstract
Osteointegration is crucial for success in orthopedic implantation. In recent decades, there have been numerous studies aiming to modify titanium alloys, which are the most widely used materials in orthopedics. Zeolites are solid aluminosilicates whose application in the biomedical field has recently been explored. To this end, MFI zeolites have been developed as titanium alloy coatings and tested in vitro. Nevertheless, the effect of the MFI coating of biomaterials in vivo has not yet been addressed. The aim of the present work is to evaluate the effects of MFI-coated Ti6Al4V implants in vitro and in vivo. After surface modification, the surface was investigated using field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). No difference was observed regarding the proliferation of MC3T3-E1 cells on the Ti6Al4V (Ti) and MFI-coated Ti6Al4V (M-Ti) (p > 0.05). However, the attachment of MC3T3-E1 cells was found to be better in the M-Ti group. Additionally, ALP staining and activity assays and quantitative real-time RT-PCR indicated that MC3T3-E1 cells grown on the M-Ti displayed high levels of osteogenic differentiation markers. Moreover, Van-Gieson staining of histological sections demonstrated that the MFI coating on Ti6Al4V scaffolds significantly enhanced osteointegration and promoted bone regeneration after implantation in rabbit femoral condylar defects at 4 and 12 weeks. Therefore, this study provides a method for modifying Ti6Al4V to achieve improved osteointegration and osteogenesis.
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Affiliation(s)
- Yong Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, People's Republic of China
| | - Yilai Jiao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, People's Republic of China
| | - Xiaokang Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, People's Republic of China
| | - Zheng Guo
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, People's Republic of China.
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28
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Zheng G, Li L, Li M, Feng X, Pu X, Zhang B, Yu P, He G, Zhang Y, Xia H. Effects of different functional groups on metastatic behavior of SPC-A-1/human lung cancer cells in self-assembled monolayers. RSC Adv 2015. [DOI: 10.1039/c4ra16554c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Self-assembled monolayers terminated with different functional groups were used to explore their effects on the metastatic behaviors of human lung cancer cells (SPC-A-1) in vitro. The addition of –SH group has potential applications for lung cancer metastasis therapy.
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Affiliation(s)
- Guan Zheng
- Southern Medical University
- Guangzhou
- People's Republic of China
| | - Lihua Li
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou 510010
- China
| | - Mei Li
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou 510010
- China
| | - Xinglong Feng
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou 510010
- China
| | - Xiaobing Pu
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou 510010
- China
| | - Baoliang Zhang
- Southern Medical University
- Guangzhou
- People's Republic of China
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
| | - Peng Yu
- National Engineering Research Center for Tissue Restoration and Reconstruction
- South China University of Technology
- Guangzhou 510641
- China
| | - Guanping He
- Southern Medical University
- Guangzhou
- People's Republic of China
| | - Yu Zhang
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou 510010
- China
| | - Hong Xia
- Southern Medical University
- Guangzhou
- People's Republic of China
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
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29
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Ramakers BEI, Bode SA, Killaars AR, van Hest JCM, Löwik DWPM. Sensing cell adhesion using polydiacetylene-containing peptide amphiphile fibres. J Mater Chem B 2015; 3:2954-2961. [DOI: 10.1039/c4tb02099e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sensing cell adhesion by means of a colourimetric response provides an intuitive measure of cell binding.
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Affiliation(s)
- B. E. I. Ramakers
- Radboud University Nijmegen
- Institute for Molecules and Materials
- Bio-organic Chemistry
- 6525 AJ Nijmegen
- The Netherlands
| | - S. A. Bode
- Radboud University Nijmegen
- Institute for Molecules and Materials
- Bio-organic Chemistry
- 6525 AJ Nijmegen
- The Netherlands
| | - A. R. Killaars
- Radboud University Nijmegen
- Institute for Molecules and Materials
- Bio-organic Chemistry
- 6525 AJ Nijmegen
- The Netherlands
| | - J. C. M. van Hest
- Radboud University Nijmegen
- Institute for Molecules and Materials
- Bio-organic Chemistry
- 6525 AJ Nijmegen
- The Netherlands
| | - D. W. P. M. Löwik
- Radboud University Nijmegen
- Institute for Molecules and Materials
- Bio-organic Chemistry
- 6525 AJ Nijmegen
- The Netherlands
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30
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Pulsipher A, Park S, Dutta D, Luo W, Yousaf MN. In situ modulation of cell behavior via smart dual-ligand surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:13656-66. [PMID: 25373713 PMCID: PMC4334223 DOI: 10.1021/la503521x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Due to the highly complex nature of the extracellular matrix (ECM), the design and implementation of dynamic, stimuli-responsive surfaces that present well-defined ligands and serve as model ECM substrates have been of tremendous interest to biomaterials, biosensor, and cell biology communities. Such tools provide strategies for identifying specific ligand-receptor interactions that induce vital biological consequences. Herein, we report a novel dual-ligand-presenting surface methodology that modulates dynamic ECM properties to investigate various cell behaviors. Peptides PHSRN, cRGD, and KKKTTK, which mimic the cell- and heparan sulfate-binding domains of fibronectin, and carbohydrates Gal and Man were combined with cell adhesive RGD to survey possible synergistic or antagonist ligand effects on cell adhesion, spreading, growth, and migration. Soluble molecule and enzymatic inhibition assays were also performed, and the levels of focal adhesion kinase in cells subjected to different ligand combinations were quantified. A redox-responsive trigger was incorporated into this surface strategy to spontaneously release ligands in the presence of adhered cells, and cell spreading, growth, and migration responses were measured and compared. The identity and nature of the dual-ligand combination directly influenced cell behavior.
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Affiliation(s)
- Abigail Pulsipher
- Department
of Chemistry, University of North Carolina
at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Sungjin Park
- Department
of Chemistry, University of North Carolina
at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Debjit Dutta
- Department
of Chemistry, University of North Carolina
at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Wei Luo
- Department
of Chemistry, University of North Carolina
at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
- Department
of Chemistry and Biology, York University, Toronto, Ontario M3J 1P3, Canada
| | - Muhammad N. Yousaf
- Department
of Chemistry, University of North Carolina
at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
- Department
of Chemistry and Biology, York University, Toronto, Ontario M3J 1P3, Canada
- E-mail: . Tel: (416) 736-2100, ext
77718
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31
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Popelka Š, Houska M, Havlíková J, Proks V, Kučka J, Šturcová A, Bačáková L, Rypáček F. Poly(ethylene oxide) brushes prepared by the “grafting to” method as a platform for the assessment of cell receptor–ligand binding. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Borges J, Mano JF. Molecular Interactions Driving the Layer-by-Layer Assembly of Multilayers. Chem Rev 2014; 114:8883-942. [DOI: 10.1021/cr400531v] [Citation(s) in RCA: 609] [Impact Index Per Article: 60.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- João Borges
- 3B’s
Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra,
S. Cláudio do Barco 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João F. Mano
- 3B’s
Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra,
S. Cláudio do Barco 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães, Portugal
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33
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Krabbenborg SO, van Weerd J, Karperien M, Jonkheijm P, Huskens J. Locked-in biomimetic surface gradients that are tunable in size, density and functionalization. Chemphyschem 2014; 15:3460-5. [PMID: 25115904 DOI: 10.1002/cphc.201402509] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Indexed: 11/09/2022]
Abstract
Tuneable and stable surface-chemical gradients in supported lipid bilayers (SLBs) hold great promise for a range of applications in biological sensing and screening. Yet, until now, no method has been reported that provides temporal control of SLB gradients. Herein we report on the development of locked-in SLB gradients that can be tuned in space, time and density by applying a process to control lipid phase behaviour, electric field and temperature. Stable gradients of charged Texas-Red-, serine- or biotin-terminated lipids have been prepared. For example, the Texas-Red surface density was varied from 0 to 2 mol %, while the length was varied between several tens to several hundreds of microns. At room temperature the gradients are shown to be stable up to 24 h, while at 60 °C the gradients could be erased in 30 min. Covalent and non-covalent chemical modification of the gradients is demonstrated, for example, by FITC, hexahistidine-tagged proteins, and SAv/biotin. The amenability to various (bio)chemistries paves the way for novel SLB-based gradients, useful in sensing, high-throughput screening and for understanding dynamic biological processes.
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Affiliation(s)
- Sven O Krabbenborg
- Molecular NanoFabrication Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (The Netherlands)
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34
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Yamamoto M, Rafii S, Rabbany SY. Scaffold biomaterials for nano-pathophysiology. Adv Drug Deliv Rev 2014; 74:104-14. [PMID: 24075835 DOI: 10.1016/j.addr.2013.09.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 09/11/2013] [Accepted: 09/20/2013] [Indexed: 01/20/2023]
Abstract
This review is intended to provide an overview of tissue engineering strategies using scaffold biomaterials to develop a vascularized tissue engineered construct for nano-pathophysiology. Two primary topics are discussed. The first is the biological or synthetic microenvironments that regulate cell behaviors in pathological conditions and tissue regeneration. Second is the use of scaffold biomaterials with angiogenic factors and/or cells to realize vascularized tissue engineered constructs for nano-pathophysiology. These topics are significantly overlapped in terms of three-dimensional (3-D) geometry of cells and blood vessels. Therefore, this review focuses on neovascularization of 3-D scaffold biomaterials induced by angiogenic factors and/or cells. The novel strategy of this approach in nano-pathophysiology is to utilize the vascularized tissue engineered construct as a tissue model to predict the distribution and subsequent therapeutic efficacy of a drug delivery system with different physicochemical and biological properties.
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Affiliation(s)
- Masaya Yamamoto
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Shahin Rafii
- Ansary Stem Cell Institute, Department of Genetic Medicine, Weill Cornell Medical College, 1300 York Ave., New York, NY 10065, USA
| | - Sina Y Rabbany
- Ansary Stem Cell Institute, Department of Genetic Medicine, Weill Cornell Medical College, 1300 York Ave., New York, NY 10065, USA; Bioengineering Program, Hofstra University, 110 Weed Hall, Hempstead, NY 11549, USA
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35
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36
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Krabbenborg SO, Huskens J. Electrochemically Generated Gradients. Angew Chem Int Ed Engl 2014; 53:9152-67. [DOI: 10.1002/anie.201310349] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Indexed: 01/06/2023]
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37
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Chandrasekaran V, Jacob H, Petersen F, Kathirvel K, Tuczek F, Lindhorst TK. Synthesis and Surface-Spectroscopic Characterization of Photoisomerizable glyco-SAMs on Au(111). Chemistry 2014; 20:8744-52. [DOI: 10.1002/chem.201402075] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 12/31/2022]
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38
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Hansen TD, Koepsel JT, Le NN, Nguyen EH, Zorn S, Parlato M, Loveland SG, Schwartz MP, Murphy WL. Biomaterial arrays with defined adhesion ligand densities and matrix stiffness identify distinct phenotypes for tumorigenic and nontumorigenic human mesenchymal cell types. Biomater Sci 2014; 2:745-756. [PMID: 25386339 PMCID: PMC4224020 DOI: 10.1039/c3bm60278h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Here, we aimed to investigate migration of a model tumor cell line (HT-1080 fibrosarcoma cells, HT-1080s) using synthetic biomaterials to systematically vary peptide ligand density and substrate stiffness. A range of substrate elastic moduli were investigated by using poly(ethylene glycol) (PEG) hydrogel arrays (0.34 - 17 kPa) and self-assembled monolayer (SAM) arrays (~0.1-1 GPa), while cell adhesion was tuned by varying the presentation of Arg-Gly-Asp (RGD)-containing peptides. HT-1080 motility was insensitive to cell adhesion ligand density on RGD-SAMs, as they migrated with similar speed and directionality for a wide range of RGD densities (0.2-5% mol fraction RGD). Similarly, HT-1080 migration speed was weakly dependent on adhesion on 0.34 kPa PEG surfaces. On 13 kPa surfaces, a sharp initial increase in cell speed was observed at low RGD concentration, with no further changes observed as RGD concentration was increased further. An increase in cell speed ~ two-fold for the 13 kPa relative to the 0.34 kPa PEG surface suggested an important role for substrate stiffness in mediating motility, which was confirmed for HT-1080s migrating on variable modulus PEG hydrogels with constant RGD concentration. Notably, despite ~ two-fold changes in cell speed over a wide range of moduli, HT-1080s adopted rounded morphologies on all surfaces investigated, which contrasted with well spread primary human mesenchymal stem cells (hMSCs). Taken together, our results demonstrate that HT-1080s are morphologically distinct from primary mesenchymal cells (hMSCs) and migrate with minimal dependence on cell adhesion for surfaces within a wide range of moduli, whereas motility is strongly influenced by matrix mechanical properties.
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Affiliation(s)
- Tyler D. Hansen
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Justin T. Koepsel
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Ngoc Nhi Le
- Materials Science Program, University of Wisconsin-Madison, WI, USA
| | - Eric H. Nguyen
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Stefan Zorn
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Matthew Parlato
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Samuel G. Loveland
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Michael P. Schwartz
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - William L. Murphy
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, WI, USA
- Materials Science Program, University of Wisconsin-Madison, WI, USA
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39
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Boekhoven J, Stupp SI. 25th anniversary article: supramolecular materials for regenerative medicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:1642-59. [PMID: 24496667 PMCID: PMC4015801 DOI: 10.1002/adma.201304606] [Citation(s) in RCA: 245] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/22/2013] [Indexed: 05/17/2023]
Abstract
In supramolecular materials, molecular building blocks are designed to interact with one another via non-covalent interactions in order to create function. This offers the opportunity to create structures similar to those found in living systems that combine order and dynamics through the reversibility of intermolecular bonds. For regenerative medicine there is a great need to develop materials that signal cells effectively, deliver or bind bioactive agents in vivo at controlled rates, have highly tunable mechanical properties, but at the same time, can biodegrade safely and rapidly after fulfilling their function. These requirements make supramolecular materials a great platform to develop regenerative therapies. This review illustrates the emerging science of these materials and their use in a number of applications for regenerative medicine.
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Affiliation(s)
- Job Boekhoven
- Institute for Bio Nanotechnology in Medicine, Northwestern University, Chicago, Illinois, USA
| | - Samuel I. Stupp
- Departments of Materials Science and Engineering, Chemistry, and Medicine, Institute for Bio Nanotechnology in Medicine, Northwestern University, Chicago, Illinois, USA, , Homepage: http://stupp.northwestern.edu
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40
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Dynamic photochemical silane micropatterning. Methods Cell Biol 2014. [PMID: 24484660 DOI: 10.1016/b978-0-12-417136-7.00007-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
This protocol describes a method for dynamic patterning cells on a glass coverslip. The glass substrate is first functionalized with photocleavable silane bearing 2-nitrobenzyl group, thereafter a cell-repellent polymer, poly(ethylene glycol) (PEG), is conjugated. Upon absorption of near-UV light, the PEG is cleaved from the surface, changing the surface from non-cell-adhesive to cell-adhesive. The method allows not only for spatially controlling cell attachment on the substrate (conventional patterning), but also inducing cell migration or coculturing heterotypic cells (dynamic patterning). Furthermore, it should be emphasized that the surface is compatible with fluorescence imaging in a high-resolution inverted objective setup as it is composed of a normal glass coverslip functionalized with the thin layers. In this chapter, I describe the procedure for the synthesis of the silane molecule, the preparation of the photoactivatable surface, and its application for dynamic cell patterning.
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41
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Xing J, Li Y, Lin M, Wang J, Wu J, Ma Y, Wang Y, Yang L, Luo Y. Surface chemistry modulates osteoblasts sensitivity to low fluid shear stress. J Biomed Mater Res A 2014; 102:4151-60. [DOI: 10.1002/jbm.a.35087] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/19/2013] [Accepted: 01/17/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Juan Xing
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Yan Li
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Manping Lin
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Jinfeng Wang
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Jinchuan Wu
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Yufei Ma
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Yuanliang Wang
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
| | - Li Yang
- Key Laboratory of Biorheological Science and Technology; Ministry of Education, Chongqing University; Chongqing 400030 China
| | - Yanfeng Luo
- Research Center of Bioinspired Material Science and Engineering College of Bioengineering; Chongqing University; Chongqing 400030 China
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42
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Adamson K, Spain E, Prendergast U, Forster RJ, Moran N, Keyes TE. Ligand capture and activation of human platelets at monolayer modified gold surfaces. Biomater Sci 2014; 2:1509-1520. [DOI: 10.1039/c4bm00241e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The effect of RGD peptides, alkane and PEG in self assembled mixed monolayers on gold on platelet adhesion and activation is explored.
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Affiliation(s)
- Kellie Adamson
- School of Chemical Sciences
- Dublin City University
- Dublin 9, Ireland
- Department of Molecular and Cellular Therapeutics
- Royal College of Surgeons in Ireland
| | - Elaine Spain
- School of Chemical Sciences
- Dublin City University
- Dublin 9, Ireland
| | - Una Prendergast
- School of Chemical Sciences
- Dublin City University
- Dublin 9, Ireland
| | | | - Niamh Moran
- Department of Molecular and Cellular Therapeutics
- Royal College of Surgeons in Ireland
- Dublin 2, Ireland
| | - Tia E. Keyes
- School of Chemical Sciences
- Dublin City University
- Dublin 9, Ireland
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43
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Nakanishi J. Switchable substrates for analyzing and engineering cellular functions. Chem Asian J 2013; 9:406-17. [PMID: 24339448 DOI: 10.1002/asia.201301325] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Indexed: 11/09/2022]
Abstract
Cellular activity is highly dependent on the extracellular environment, which is composed of surrounding cells and extracellular matrices. This focus review summarizes recent advances in chemically and physically engineered switchable substrates designed to control such cellular microenvironments by application of an external stimulus. Special attention is given to their molecular design, switching strategies, and representative examples for bioanalytical and biomedical applications.
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Affiliation(s)
- Jun Nakanishi
- WPI Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan).
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44
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Kazemi SH, Alizadeh A, Mohamadi R, Khodaei MM, Kordestani D. pH-regulated release of dopamine from well-ordered self-assembled monolayers: Electrochemical studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:5095-9. [DOI: 10.1016/j.msec.2013.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 06/24/2013] [Accepted: 07/05/2013] [Indexed: 10/26/2022]
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45
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Böhmler J, Ponche A, Anselme K, Ploux L. Self-assembled molecular platforms for bacteria/material biointerface studies: importance to control functional group accessibility. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10478-10488. [PMID: 24107186 DOI: 10.1021/am401976g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Highly controlled mixed molecular layers are crucial to study the role of material surface chemistry in biointerfaces, such as bacteria and subsequent biofilms interacting with biomaterials. Silanes with non-nucleophilic functional groups are promising to form self-assembled monolayers (SAMs) due to their low sensitivity to side-reactions. Nevertheless, the real control of surface chemistry, layer structure, and organization has not been determined. Here, we report a comprehensive synthesis and analysis of undecyltrichlorosilane- and 11-bromoundecyltrichlorosilane-based mixed SAMs on silicon substrates. The impact of the experimental conditions on the control of surface chemistry, layer structure, and organization was investigated by combining survey and high-resolution X-ray photoelectron spectroscopy analysis, wettability measurements, and ellipsometry. The most appropriate conditions were first determined for elaborating highly reproducible, but easily made, pure 11-bromoundecyltrichlorosilane SAMs. We have demonstrated that the control is maintained on more complex surfaces, i.e., surfaces revealing various chemical densities, which were obtained with different ratios of undecyltrichlorosilane and 11-bromoundecyltrichlorosilane. The control is also maintained after bromine to amine group conversion via SN2 bromine-to-azide reactions. The appropriateness of such highly controlled amino- and methyl-group revealing platforms (NH2-X%/CH3) for biointerface studies was shown by the higher reproducibility of bacterial adhesion on NH2-100%/CH3 SAMs compared to bacterial adhesion on molecular layers of overall similar surface chemistry but less control at the molecular scale.
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Affiliation(s)
- Judith Böhmler
- Institut of Materials Science of Mulhouse (CNRS UMR7361), Mulhouse, France
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46
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Functionalization of biomaterials with small osteoinductive moieties. Acta Biomater 2013; 9:8773-89. [PMID: 23933486 DOI: 10.1016/j.actbio.2013.08.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/11/2013] [Accepted: 08/02/2013] [Indexed: 12/16/2022]
Abstract
Human mesenchymal stem cells (MSCs) are currently recognized as a powerful cell source for regenerative medicine, notably for their capacity to differentiate into multiple cell types. The combination of MSCs with biomaterials functionalized with instructive cues can be used as a strategy to direct specific lineage commitment, and can thus improve the therapeutic efficacy of these cells. In terms of biomaterial design, one common approach is the functionalization of materials with ligands capable of directly binding to cell receptors and trigger specific differentiation signaling pathways. Other strategies focus on the use of moieties that have an indirect effect, acting, for example, as sequesters of bioactive ligands present in the extracellular milieu that, in turn, will interact with cells. Compared with complex biomolecules, the use of simple compounds, such as chemical moieties and peptides, and other small molecules can be advantageous by leading to less expensive and easily tunable biomaterial formulations. This review describes different strategies that have been used to promote substrate-mediated guidance of osteogenic differentiation of immature osteoblasts, osteoprogenitors and MSCs, through chemically conjugated small moieties, both in two- and three-dimensional set-ups. In each case, the selected moiety, the coupling strategy and the main findings of the study were highlighted. The latest advances and future perspectives in the field are also discussed.
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47
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Reactivity mapping with electrochemical gradients for monitoring reactivity at surfaces in space and time. Nat Commun 2013; 4:1667. [PMID: 23575671 PMCID: PMC3644076 DOI: 10.1038/ncomms2688] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 03/01/2013] [Indexed: 01/25/2023] Open
Abstract
Studying and controlling reactions at surfaces is of great fundamental and applied interest in, among others, biology, electronics and catalysis. Because reaction kinetics is different at surfaces compared with solution, frequently, solution-characterization techniques cannot be used. Here we report solution gradients, prepared by electrochemical means, for controlling and monitoring reactivity at surfaces in space and time. As a proof of principle, electrochemically derived gradients of a reaction parameter (pH) and of a catalyst (Cu(I)) have been employed to make surface gradients on the micron scale and to study the kinetics of the (surface-confined) imine hydrolysis and the copper(I)-catalysed azide-alkyne 1,3-dipolar cycloaddition, respectively. For both systems, the kinetic data were spatially visualized in a two-dimensional reactivity map. In the case of the copper(I)-catalysed azide-alkyne 1,3-dipolar cycloaddition, the reaction order (2) was deduced from it.
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48
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Tan YH, Terrill SE, Paranjape GS, Stine KJ, Nichols MR. The influence of gold surface texture on microglia morphology and activation. Biomater Sci 2013; 2:110-120. [PMID: 32481813 DOI: 10.1039/c3bm60096c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Microglial cells play a critical role in the propagation of neuroinflammation in the central nervous system. Microglia sense and respond to environmental signals including chemical, physical and biological cues from the surrounding cell/tissue components. In this project, our goal was to examine the effects of surface texture on BV-2 microglia morphology and function by comparing flat and nanoporous gold (np-Au) surfaces to the more conventional glass. The biocompatibility of np-Au with microglia was evaluated using functional cell assays and high resolution imaging with scanning electron microscopy (SEM). Microglia seeded on glass, ultra-flat gold (UF-Au), ultra-thin (UT) np-Au and np-Au monolith were adherent to all surfaces and their viability was not compromised as assessed by multiple toxicity assays. SEM revealed detailed morphological characteristics of adherent microglia and indicated few dramatic changes as a result of the different surfaces. Microglia proliferation was hampered by np-Au monolith but less by UT np-Au and not at all on UF-Au or glass. Microglial activation, measured by tumor necrosis factor α (TNFα) production, was fully functional (and equivalent) on all gold surfaces compared to glass. The present findings should help further the understanding of basic microglia biology on textured surfaces and more fully evaluate np-Au as a multi-functional biocompatible material. The knowledge obtained and technology developed will have a significant impact in the fabrication of nanoelectronic devices, chemical sensor development, porous nanostructured materials for BioMEMs/NEMs integration, and functional biomaterial coatings for drug delivery.
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Affiliation(s)
- Yih Horng Tan
- Department of Chemistry and Biochemistry and Center for Nanoscience, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
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49
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Activation of the ERK1/2 signaling pathway during the osteogenic differentiation of mesenchymal stem cells cultured on substrates modified with various chemical groups. BIOMED RESEARCH INTERNATIONAL 2013; 2013:361906. [PMID: 24069599 PMCID: PMC3771309 DOI: 10.1155/2013/361906] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 07/09/2013] [Accepted: 07/16/2013] [Indexed: 12/22/2022]
Abstract
The current study examined the influence of culture substrates modified with the functional groups –OH, –COOH, –NH2, and –CH3 using SAMs technology, in conjunction with TAAB control, on the osteogenic differentiation of rabbit BMSCs. The CCK-8 assay revealed that BMSCs exhibited substrate-dependent cell viability. The cells plated on –NH2- and –OH-modified substrates were well spread and homogeneous, but those on the –COOH- and –CH3-modified substrates showed more rounded phenotype. The mRNA expression of BMSCs revealed that –NH2-modified substrate promoted the mRNA expression and osteogenic differentiation of the BMSCs. The contribution of ERK1/2 signaling pathway to the osteogenic differentiation of BMSCs cultured on the –NH2-modified substrate was investigated in vitro. The –NH2-modified substrate promoted the expression of integrins; the activation of FAK and ERK1/2. Inhibition of ERK1/2 activation by PD98059, a specific inhibitor of the ERK signaling pathway, blocked ERK1/2 activation in a dose-dependent manner, as revealed for expression of Cbfα-1 and ALP. Blockade of ERK1/2 phosphorylation in BMSCs by PD98059 suppressed osteogenic differentiation on chemical surfaces. These findings indicate a potential role for ERK in the osteogenic differentiation of BMSCs on surfaces modified by specific chemical functional groups, indicating that the microenvironment affects the differentiation of BMSCs. This observation has important implications for bone tissue engineering.
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50
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Kokoschka M, Henry JB, Bandarenka AS. Multiparametric characterization of nonelectroactive self-assembled monolayers during their formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9909-9917. [PMID: 23845034 DOI: 10.1021/la400749m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The formation of nonelectroactive self-assembled monolayers (SAMs) at the electrode/electrolyte interface was characterized with simultaneous impedance, gravimetric, and direct current measurements. In the presence of specifically adsorbing inorganic ions, this provides key information about the formation of SAMs. Gravimetric measurements allow an estimation of the adsorbate surface coverage; and completion of the assembly process can then be monitored in real-time. Electrochemical impedance spectroscopy measurements play a multifunctional role: they enable elucidation of the physical models of the interface, provide the information about the effective capacitance of SAMs thus probing the dielectric properties of the adsorbed layers, and evaluate the ability of charged electrolyte components to approach the electrode surface through the SAM (using adsorbing/desorbing SO4(2-) as an electroactive probe). The latter is important to assess the extent of defects in the formed organic layers. Finally, monitoring the direct current during SAM formation together with the collected gravimetric data can give additional important information about the process. A series of n-mercaptoalcohols with different hydrocarbon chain length adsorbing at Au electrodes was used as the model object to evaluate the proposed approach.
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Affiliation(s)
- Malte Kokoschka
- Institute of Organic Chemistry and Biochemistry and Gilead Sciences Research Center, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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