1
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Nadendla K, Simpson GG, Becher J, Journeaux T, Cabeza-Cabrerizo M, Bernardes GJL. Strategies for Conditional Regulation of Proteins. JACS AU 2023; 3:344-357. [PMID: 36873677 PMCID: PMC9975842 DOI: 10.1021/jacsau.2c00654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 06/18/2023]
Abstract
Design of the next-generation of therapeutics, biosensors, and molecular tools for basic research requires that we bring protein activity under control. Each protein has unique properties, and therefore, it is critical to tailor the current techniques to develop new regulatory methods and regulate new proteins of interest (POIs). This perspective gives an overview of the widely used stimuli and synthetic and natural methods for conditional regulation of proteins.
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Affiliation(s)
- Karthik Nadendla
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
| | - Grant G. Simpson
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
| | - Julie Becher
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
| | - Toby Journeaux
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
| | - Mar Cabeza-Cabrerizo
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
| | - Gonçalo J. L. Bernardes
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, CB2 1EW, Cambridge, U.K.
- Instituto
de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
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2
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Welden R, Schöning MJ, Wagner PH, Wagner T. Light-Addressable Electrodes for Dynamic and Flexible Addressing of Biological Systems and Electrochemical Reactions. SENSORS 2020; 20:s20061680. [PMID: 32192226 PMCID: PMC7147159 DOI: 10.3390/s20061680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/13/2020] [Accepted: 03/13/2020] [Indexed: 01/25/2023]
Abstract
In this review article, we are going to present an overview on possible applications of light-addressable electrodes (LAE) as actuator/manipulation devices besides classical electrode structures. For LAEs, the electrode material consists of a semiconductor. Illumination with a light source with the appropiate wavelength leads to the generation of electron-hole pairs which can be utilized for further photoelectrochemical reaction. Due to recent progress in light-projection technologies, highly dynamic and flexible illumination patterns can be generated, opening new possibilities for light-addressable electrodes. A short introduction on semiconductor–electrolyte interfaces with light stimulation is given together with electrode-design approaches. Towards applications, the stimulation of cells with different electrode materials and fabrication designs is explained, followed by analyte-manipulation strategies and spatially resolved photoelectrochemical deposition of different material types.
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Affiliation(s)
- Rene Welden
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Michael J. Schöning
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Institute of Complex Systems (ICS-8), Research Center Jülich GmbH, 52428 Jülich, Germany
| | - Patrick H. Wagner
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Torsten Wagner
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, 52428 Jülich, Germany; (R.W.); (M.J.S.)
- Institute of Complex Systems (ICS-8), Research Center Jülich GmbH, 52428 Jülich, Germany
- Correspondence: ; Tel.: +49-241-6009-53766
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3
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Ryzhkov NV, Skorb EV. A platform for light-controlled formation of free-stranding lipid membranes. J R Soc Interface 2020. [DOI: 10.1098/rsif.2019.0740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The engineering of artificial cells is one of the most significant scientific challenges. Thus, controlled fabrication and
in situ
monitoring of biomimetic nanoscale objects are among the central issues in current science and technology. Studies of transmembrane channels and cell mechanics often require the formation of lipid bilayers (LBs), their modification and their transfer to a particular place. We present here a novel approach for remotely controlled manipulation of LBs. Layer-by-layer deposition of polyethyleneimine and poly(sodium 4-styrenesulfonate) on a nanostructured TiO
2
photoanode was performed to obtain a surface with the desired net charge and to enhance photocatalytic performance. The LB was deposited on top of a multi-layer positive polymer cushion by the dispersion of negative vesicles. The separation distance between the electrostatically linked polyelectrolyte cushion and the LB can be adjusted by changing the environmental pH, as zwitter-ionic lipid molecules undergo pH-triggered charge-shifting. Protons were generated remotely by photoanodic water decomposition on the TiO
2
surface under 365 nm illumination. The resulting pH gradient was characterized by scanning vibrating electrode and scanning ion-selective electrode techniques. The light-induced reversible detachment of the LB from the polymer-cushioned photoactive substrate was found to correlate with suggested impedance models.
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4
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Boyaciyan D, von Klitzing R. Stimuli-responsive polymer/metal composites: From fundamental research to self-regulating devices. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.10.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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5
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Ryzhkov NV, Andreeva DV, Skorb EV. Coupling pH-Regulated Multilayers with Inorganic Surfaces for Bionic Devices and Infochemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8543-8556. [PMID: 31018639 DOI: 10.1021/acs.langmuir.9b00633] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This article summarizes more than 10 years of cooperation with Prof. Helmuth Möhwald. Here we describe how the research moved from light-regulated feedback sustainable systems and control biodevices to the current focus on infochemistry in aqueous solution. An important advanced characteristic of such materials and devices is the pH concentration gradient in aqueous solution. A major part of the article focuses on the use of localized illumination for proton generation as a reliable, minimal-reagent-consuming, stable light-promoted proton pump. The in situ scanning vibration electrode technique (SVET) and scanning ion-selective electrode technique (SIET) are efficient for the spatiotemporal evolution of ions on the surface. pH-sensitive polyelectrolyte (PEs) multilayers with different PE architectures are composed with a feedback loop for bionic devices. We show here that pH-regulated PE multilayers can change their properties-film thickness and stiffness, permeability, hydrophilicity, and/or fluorescence-in response to light or electrochemical or biological processes instead of classical acid/base titration.
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Affiliation(s)
| | - Daria V Andreeva
- Centre for Advanced 2D Materials and Graphene Research Centre , National University of Singapore , 117546 Singapore
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6
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Saveleva MS, Eftekhari K, Abalymov A, Douglas TEL, Volodkin D, Parakhonskiy BV, Skirtach AG. Hierarchy of Hybrid Materials-The Place of Inorganics- in-Organics in it, Their Composition and Applications. Front Chem 2019; 7:179. [PMID: 31019908 PMCID: PMC6459030 DOI: 10.3389/fchem.2019.00179] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 03/07/2019] [Indexed: 12/21/2022] Open
Abstract
Hybrid materials, or hybrids incorporating both organic and inorganic constituents, are emerging as a very potent and promising class of materials due to the diverse, but complementary nature of the properties inherent of these different classes of materials. The complementarity leads to a perfect synergy of properties of desired material and eventually an end-product. The diversity of resultant properties and materials used in the construction of hybrids, leads to a very broad range of application areas generated by engaging very different research communities. We provide here a general classification of hybrid materials, wherein organics-in-inorganics (inorganic materials modified by organic moieties) are distinguished from inorganics-in-organics (organic materials or matrices modified by inorganic constituents). In the former area, the surface functionalization of colloids is distinguished as a stand-alone sub-area. The latter area-functionalization of organic materials by inorganic additives-is the focus of the current review. Inorganic constituents, often in the form of small particles or structures, are made of minerals, clays, semiconductors, metals, carbons, and ceramics. They are shown to be incorporated into organic matrices, which can be distinguished as two classes: chemical and biological. Chemical organic matrices include coatings, vehicles and capsules assembled into: hydrogels, layer-by-layer assembly, polymer brushes, block co-polymers and other assemblies. Biological organic matrices encompass bio-molecules (lipids, polysaccharides, proteins and enzymes, and nucleic acids) as well as higher level organisms: cells, bacteria, and microorganisms. In addition to providing details of the above classification and analysis of the composition of hybrids, we also highlight some antagonistic yin-&-yang properties of organic and inorganic materials, review applications and provide an outlook to emerging trends.
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Affiliation(s)
- Mariia S. Saveleva
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Remote Controlled Theranostic Systems Lab, Educational Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russia
| | - Karaneh Eftekhari
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Anatolii Abalymov
- Remote Controlled Theranostic Systems Lab, Educational Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russia
| | - Timothy E. L. Douglas
- Engineering Department and Materials Science Institute (MSI), Lancaster University, Lancaster, United Kingdom
| | - Dmitry Volodkin
- School of Science & Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Bogdan V. Parakhonskiy
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Andre G. Skirtach
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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7
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Chen XC, Huang WP, Hu M, Ren KF, Ji J. Controlling Structural Transformation of Polyelectrolyte Films for Spatially Encapsulating Functional Species. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1804867. [PMID: 30677229 DOI: 10.1002/smll.201804867] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Although many approaches have been developed to encapsulate functional species into polyelectrolyte films, few of them can effectively control the final distribution of these ones. Herein, a facile strategy is proposed to spatially control the encapsulation of guest species by locally regulating the structural transformation of polyelectrolyte films. Patterned porosity is created within a film by cross-linking it selectively and then immersing it in an acidic solution. These porous regions can exhibit significantly different properties from other regions, including the ability to wick solution, a greater retention of guest species, and the capability of structural transformation. After loading guest species, the porous structures can be eliminated at saturated humidity to encapsulate the guest species into the film, leading to their patterned distribution across the film. Based on this method, various guest species, ranging from fluorescent dyes to nanoparticles, can be locally encapsulated into polyelectrolyte film, forming distinct patterns of arbitrary shapes and sizes and thus paving the way for further applications.
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Affiliation(s)
- Xia-Chao Chen
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Wei-Pin Huang
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Mi Hu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Ke-Feng Ren
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Jian Ji
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
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8
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Ryzhkov NV, Mamchik NA, Skorb EV. Electrochemical triggering of lipid bilayer lift-off oscillation at the electrode interface. J R Soc Interface 2019; 16:20180626. [PMID: 30958160 PMCID: PMC6364645 DOI: 10.1098/rsif.2018.0626] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 12/13/2018] [Indexed: 12/12/2022] Open
Abstract
In situ studies of transmembrane channels often require a model bioinspired artificial lipid bilayer (LB) decoupled from its underlaying support. Obtaining free-standing lipid membranes is still a challenge. In this study, we suggest an electrochemical approach for LB separation from its solid support via hydroquinone oxidation. Layer-by-layer deposition of polyethylenimine (PEI) and polystyrene sulfonate (PSS) on the gold electrode was performed to obtain a polymeric nanocushion of [PEI/PSS]3/PEI. The LB was deposited on top of an underlaying polymer support from the dispersion of small unilamellar vesicles due to their electrostatic attraction to the polymer support. Since lipid zwitterions demonstrate pH-dependent charge shifting, the separation distance between the polyelectrolyte support and LB can be adjusted by changing the environmental pH, leading to lipid molecules recharge. The proton generation associated with hydroquinone oxidation was studied using scanning vibrating electrode and scanning ion-selective electrode techniques. Electrochemical impedance spectroscopy is suggested to be a powerful instrument for the in situ observation of processes associated with the LB-solid support interface. Electrochemical spectroscopy highlighted the reversible disappearance of the LB impact on impedance in acidic conditions set by dilute acid addition as well as by electrochemical proton release on the gold electrode due to hydroquinone oxidation.
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Affiliation(s)
- Nikolay V. Ryzhkov
- ITMO University, 9 Lomonosova Street, St Petersburg 191002, Russian Federation
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9
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Nikitina AA, Ulasevich SA, Kassirov IS, Bryushkova EA, Koshel EI, Skorb EV. Nanostructured Layer-by-Layer Polyelectrolyte Containers to Switch Biofilm Fluorescence. Bioconjug Chem 2018; 29:3793-3799. [PMID: 30350577 DOI: 10.1021/acs.bioconjchem.8b00648] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The development of stimuli-responsive nanocontainers is an issue of utmost importance for many applications such as targeted drug delivery, regulation of the cell and tissue behavior, making bacteria have useful functions and here converting light. The present work shows a new contribution to the design of polyelectrolyte (PE) containers based on surface modified mesoporous titania particles with deposited Ag nanoparticles to achieve chemical light upconversion via biofilms. The PE shell allows slowing down the kinetics of a release of loaded l-arabinose and switching the bacteria luminescence in a certain time. The hybrid TiO2/Ag/PE containers activated at 980 nm (IR) illumination demonstrate 10 times faster release of l-arabinose as opposed to non-activated containers. Fast IR-released l-arabinose switch bacteria fluorescence which we monitor at 510 nm. The approach described herein can be used in many applications where the target and delayed switching and light upconversion are required.
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Affiliation(s)
- Anna A Nikitina
- ITMO University , St. Petersburg 191002 , Russian Federation
| | | | - Ilia S Kassirov
- ITMO University , St. Petersburg 191002 , Russian Federation
| | | | - Elena I Koshel
- ITMO University , St. Petersburg 191002 , Russian Federation
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10
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Lanchuk Y, Nikitina A, Brezhneva N, Ulasevich SA, Semenov SN, Skorb EV. Photocatalytic Regulation of an Autocatalytic Wave of Spatially Propagating Enzymatic Reactions. ChemCatChem 2018. [DOI: 10.1002/cctc.201702005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yulia Lanchuk
- Infochemistry for Self-Adaptive Materials; SCAMT Laboratory; ITMO University; St. Petersburg 197101 Russian Federation
| | - Anna Nikitina
- Infochemistry for Self-Adaptive Materials; SCAMT Laboratory; ITMO University; St. Petersburg 197101 Russian Federation
| | - Nadzeya Brezhneva
- Infochemistry for Self-Adaptive Materials; SCAMT Laboratory; ITMO University; St. Petersburg 197101 Russian Federation
| | - Sviatlana A. Ulasevich
- Infochemistry for Self-Adaptive Materials; SCAMT Laboratory; ITMO University; St. Petersburg 197101 Russian Federation
| | - Sergey N. Semenov
- Chemistry and Chemical Biology; Harvard University; 02138 Cambridge MA USA
| | - Ekaterina V. Skorb
- Infochemistry for Self-Adaptive Materials; SCAMT Laboratory; ITMO University; St. Petersburg 197101 Russian Federation
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11
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Lanchuk Y, Ulasevich SA, Fedotova TA, Kolpashchikov DM, Skorb EV. Towards sustainable diagnostics: replacing unstable H2O2 by photoactive TiO2 in testing systems for visible and tangible diagnostics for use by blind people. RSC Adv 2018; 8:37735-37739. [PMID: 35558580 PMCID: PMC9089394 DOI: 10.1039/c8ra06711b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 10/31/2018] [Indexed: 11/23/2022] Open
Abstract
Blind and color blind people cannot use colorimetric diagnostics; the problem is especially severe in rural areas where high temperatures and the absence of electricity challenge modern diagnostics. Here we propose to replace the unstable component of a diagnostic test, H2O2, with stable TiO2. Under UV irradiation, TiO2 forms reactive oxygen species that initiate polymerization of acrylamide causing liquid-to-gel transition in an analyte-dependent manner. We demonstrate that specific DNA sequences can be detected using this approach. This development may enable the detection of biological molecules by users with limited resources, for example in developing countries or for travelers in remote areas. Blind and color blind people cannot afford colorimetric diagnostics; the problem is especially severe in rural areas where high temperatures and the absence of electricity challenge modern diagnostics.![]()
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Affiliation(s)
| | | | | | - Dmitry M. Kolpashchikov
- ITMO University
- St. Petersburg
- Russian Federation
- Chemistry Department University of Central Florida
- Orlando
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12
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Zhukova Y, Hiepen C, Knaus P, Osterland M, Prohaska S, Dunlop JWC, Fratzl P, Skorb EV. The Role of Titanium Surface Nanostructuring on Preosteoblast Morphology, Adhesion, and Migration. Adv Healthc Mater 2017; 6. [PMID: 28371540 DOI: 10.1002/adhm.201601244] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 02/04/2017] [Indexed: 11/06/2022]
Abstract
Surface structuring of titanium-based implants is known to modulate the behavior of adherent cells, but the influence of different nanotopographies is poorly understood. The aim is to investigate preosteoblast proliferation, adhesion, morphology, and migration on surfaces with similar surface chemistry but distinct nanotopographical features. Sonochemical treatment and anodic oxidation are employed to fabricate disordered, mesoporous titania (TMS) and ordered titania nanotubular (TNT) topographies on titanium, respectively. Morphological evaluation reveals that cells are polygonal and well-spread on TMS, but display an elongated, fibroblast-like morphology on TNT surfaces, while they are much flatter on glass. Both nanostructured surfaces impair cell adhesion, but TMS is more favorable for cell growth due to its support of cell attachment and spreading in contrast to TNT. A quantitative wound healing assay in combination with live-cell imaging reveals that cell migration on TMS surfaces has a more collective character than on other surfaces, probably due to a closer proximity between neighboring migrating cells on TMS. The results indicate distinctly different cell adhesion and migration on ordered and disordered titania nanotopographies, providing important information that can be used in optimizing titanium-based scaffold design to foster bone tissue growth and repair while allowing for the encapsulation of drugs into porous titania layer.
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Affiliation(s)
- Yulia Zhukova
- Department of Biomaterials; Max Planck Institute of Colloids and Interfaces; 14476 Potsdam-Golm Germany
| | - Christian Hiepen
- Institute for Chemistry and Biochemistry; Freie Universität Berlin; 14195 Berlin Germany
| | - Petra Knaus
- Institute for Chemistry and Biochemistry; Freie Universität Berlin; 14195 Berlin Germany
| | - Marc Osterland
- Zuse Institute Berlin; 14195 Berlin Germany
- Institute for Mathematics; Freie Universität Berlin; 14195 Berlin Germany
| | | | - John W. C. Dunlop
- Department of Biomaterials; Max Planck Institute of Colloids and Interfaces; 14476 Potsdam-Golm Germany
| | - Peter Fratzl
- Department of Biomaterials; Max Planck Institute of Colloids and Interfaces; 14476 Potsdam-Golm Germany
| | - Ekaterina V. Skorb
- Department of Biomaterials; Max Planck Institute of Colloids and Interfaces; 14476 Potsdam-Golm Germany
- Laboratory of Solution Chemistry of Advanced Materials and Technologies; ITMO University; 197101 St. Petersburg Russian Federation
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13
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Maltanava HM, Poznyak SK, Andreeva DV, Quevedo MC, Bastos AC, Tedim J, Ferreira MGS, Skorb EV. Light-Induced Proton Pumping with a Semiconductor: Vision for Photoproton Lateral Separation and Robust Manipulation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:24282-24289. [PMID: 28654237 DOI: 10.1021/acsami.7b05209] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Energy-transfer reactions are the key for living open systems, biological chemical networking, and the development of life-inspired nanoscale machineries. It is a challenge to find simple reliable synthetic chemical networks providing a localization of the time-dependent flux of matter. In this paper, we look to photocatalytic reaction on TiO2 from different angles, focusing on proton generation and introducing a reliable, minimal-reagent-consuming, stable inorganic light-promoted proton pump. Localized illumination was applied to a TiO2 surface in solution for reversible spatially controlled "inorganic photoproton" isometric cycling, the lateral separation of water-splitting reactions. The proton flux is pumped during the irradiation of the surface of TiO2 and dynamically maintained at the irradiated surface area in the absence of any membrane or predetermined material structure. Moreover, we spatially predetermine a transient acidic pH value on the TiO2 surface in the irradiated area with the feedback-driven generation of a base as deactivator. Importantly we describe how to effectively monitor the spatial localization of the process by the in situ scanning ion-selective electrode technique (SIET) measurements for pH and the scanning vibrating electrode technique (SVET) for local photoelectrochemical studies without additional pH-sensitive dye markers. This work shows the great potential for time- and space-resolved water-splitting reactions for following the investigation of pH-stimulated processes in open systems with their flexible localization on a surface.
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Affiliation(s)
- Hanna M Maltanava
- The Research Institute for Physical Chemical Problems, Belarusian State University , Minsk 220030, Belarus
| | - Sergey K Poznyak
- The Research Institute for Physical Chemical Problems, Belarusian State University , Minsk 220030, Belarus
| | - Daria V Andreeva
- Center for Soft and Living Matter, Institute of Basic Science Ulsan, National Institute of Science and Technology , Ulsan 44919, Republic of Korea
| | - Marcela C Quevedo
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Alexandre C Bastos
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - João Tedim
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Mário G S Ferreira
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Ekaterina V Skorb
- Laboratory of Solution Chemistry of Advanced Materials and Technologies (SCAMT), ITMO University , St. Petersburg 197101, Russian Federation
- Department of Chemistry and Chemical Biology, Harvard University , 12 Oxford Street, Cambridge 02138, Massachusetts, United States
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14
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Zhukova Y, Skorb EV. Cell Guidance on Nanostructured Metal Based Surfaces. Adv Healthc Mater 2017; 6. [PMID: 28196304 DOI: 10.1002/adhm.201600914] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/21/2016] [Indexed: 11/07/2022]
Abstract
Metal surface nanostructuring to guide cell behavior is an attractive strategy to improve parts of medical implants, lab-on-a-chip, soft robotics, self-assembled microdevices, and bionic devices. Here, we discus important parameters, relevant trends, and specific examples of metal surface nanostructuring to guide cell behavior on metal-based hybrid surfaces. Surface nanostructuring allows precise control of cell morphology, adhesion, internal organization, and function. Pre-organized metal nanostructuring and dynamic stimuli-responsive surfaces are used to study various cell behaviors. For cells dynamics control, the oscillating stimuli-responsive layer-by-layer (LbL) polyelectrolyte assemblies are discussed to control drug delivery, coating thickness, and stiffness. LbL films can be switched "on demand" to change their thickness, stiffness, and permeability in the dynamic real-time processes. Potential applications of metal-based hybrids in biotechnology and selected examples are discussed.
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Affiliation(s)
- Yulia Zhukova
- Biomaterials Department; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 Potsdam 14424 Germany
| | - Ekaterina V. Skorb
- Biomaterials Department; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 Potsdam 14424 Germany
- Laboratory of Solution Chemistry of Advanced Materials and Technologies (SCAMT); ITMO University; St. Petersburg 197101 Russian Federation
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15
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Andreeva DV, Kollath A, Brezhneva N, Sviridov DV, Cafferty BJ, Möhwald H, Skorb EV. Using a chitosan nanolayer as an efficient pH buffer to protect pH-sensitive supramolecular assemblies. Phys Chem Chem Phys 2017; 19:23843-23848. [DOI: 10.1039/c7cp02618h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose that chitosan can be used as an efficient pH-responsive protective layer for pH sensitive soft materials.
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Affiliation(s)
- D. V. Andreeva
- Center for Soft and Living Matter
- Institute of basic science
- Ulsan National Institute of Science and Technology
- 44919 Ulsan
- Republic of Korea
| | - A. Kollath
- Physical Chemistry II
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - N. Brezhneva
- Belarusian State University
- 220030 Minsk
- Belarus
- Max Planck Institute of Colloids and Interfaces
- 14424 Potsdam
| | | | - B. J. Cafferty
- Department of Chemistry and Chemical Biology
- Harvard University
- 02138 Cambridge
- USA
| | - H. Möhwald
- Max Planck Institute of Colloids and Interfaces
- 14424 Potsdam
- Germany
| | - E. V. Skorb
- Max Planck Institute of Colloids and Interfaces
- 14424 Potsdam
- Germany
- Laboratory of Solution Chemistry of Advanced Materials and Technologies (SCAMT) ITMO University St. Petersburg
- Russian Federation
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