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Velk N, Keller J, Duschl C, Brezesinski G, Volodkin D. Interaction of Lysozyme with Poly(L-lysine)/Hyaluronic Acid Multilayers: An ATR-FTIR Study. Polymers (Basel) 2023; 15:polym15041036. [PMID: 36850324 PMCID: PMC9964902 DOI: 10.3390/polym15041036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/10/2023] [Accepted: 02/12/2023] [Indexed: 02/22/2023] Open
Abstract
Polyelectrolyte multilayers (PEM) loaded with bioactive molecules such as proteins serve as excellent mimics of an extracellular matrix and may find applications in fields such as biomedicine and cell biology. A question which is crucial to the successful employment of PEMs is whether conformation and bioactivity of the loaded proteins is preserved. In this work, the polarized attenuated total reflection Fourier transform infrared (ATR-FTIR) technique is applied to investigate the conformation of the protein lysozyme (Lys) loaded into the poly(L-lysine)/hyaluronic acid (PLL/HA) multilayers. Spectra are taken from the protein in the PEMs coated onto an ATR crystal during protein adsorption and desorption. For comparison, a similar investigation is performed for the case of Lys in contact with the uncoated crystal. The study highlights the presence of both "tightly" and "poorly bound" Lys fractions in the PEM. These fractions differ in their conformation and release behavior from the PEM upon washing. Comparison of spectra recorded with different polarizations suggests preferential orientation of alpha helical structures, beta sheets and turns in the "tightly bound" Lys. In contrast, the "poorly bound" fraction shows isotropic orientation and its conformation is well preserved.
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Affiliation(s)
- Natalia Velk
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Janos Keller
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Claus Duschl
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Dmitry Volodkin
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK
- Correspondence:
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2
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Urbaniak T, García-Briones GS, Zhigunov A, Hladysh S, Adrian E, Lobaz V, Krunclová T, Janoušková O, Pop-Georgievski O, Kubies D. Quaternized Chitosan/Heparin Polyelectrolyte Multilayer Films for Protein Delivery. Biomacromolecules 2022; 23:4734-4748. [DOI: 10.1021/acs.biomac.2c00926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomasz Urbaniak
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
- Department of Physical Chemistry and Biophysics, Pharmaceutical Faculty, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland
| | - Gabriela S. García-Briones
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Alexander Zhigunov
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Sviatoslav Hladysh
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Edyta Adrian
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Volodymyr Lobaz
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Tereza Krunclová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Olga Janoušková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
- Jan Purkyňe University in Ústí nad Labem, Faculty of Science, Pasteurova 1, 400 96 Ústí nad Labem, Czech Republic
| | - Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Dana Kubies
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague, Czech Republic
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3
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Localized Enzyme-Assisted Self-Assembly of low molecular weight hydrogelators. Mechanism, applications and perspectives. Adv Colloid Interface Sci 2022; 304:102660. [PMID: 35462266 DOI: 10.1016/j.cis.2022.102660] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/28/2022] [Accepted: 03/31/2022] [Indexed: 01/31/2023]
Abstract
Nature uses systems of high complexity coordinated by the precise spatial and temporal control of associated processes, working from the molecular to the macroscopic scale. This living organization is mainly ensured by enzymatic actions. Herein, we review the concept of Localized Enzyme-Assisted Self-Assembly (LEASA). It is defined and presented as a straightforward and insightful strategy to achieve high levels of control in artificial systems. Indeed, the use of immobilized enzymes to drive self-assembly events leads not only to the local formation of supramolecular structures but also to tune their kinetics and their morphologies. The possibility to design tailored complex systems taking advantage of self-assembled networks through their inherent and emergent properties offers new perspectives for the design of novel, more adaptable materials. As a result, some applications have already been developed and are gathered in this review. Finally, challenges and perspectives of LEASA are introduced and discussed.
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4
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Pahal S, Boranna R, Prashanth GR, Varma MM. Simplifying Molecular Transport in Polyelectrolyte Multilayer Thin Films. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Suman Pahal
- Institute for Stem Cell Science and Regenerative Medicine (inStem) Bengaluru Karnataka 560065 India
- Centre for Nano Science and Engineering Indian Institute of Science Bengaluru Karnataka 560012 India
| | - Rakshith Boranna
- Department of Electronics and Communication Engineering National Institute of Technology Goa Farmagudi Ponda Goa 403401 India
| | - Gurusiddappa R. Prashanth
- Department of Electronics and Communication Engineering National Institute of Technology Goa Farmagudi Ponda Goa 403401 India
| | - Manoj M. Varma
- Centre for Nano Science and Engineering Indian Institute of Science Bengaluru Karnataka 560012 India
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5
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Campbell J, Vikulina AS. Layer-By-Layer Assemblies of Biopolymers: Build-Up, Mechanical Stability and Molecular Dynamics. Polymers (Basel) 2020; 12:E1949. [PMID: 32872246 PMCID: PMC7564420 DOI: 10.3390/polym12091949] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 12/18/2022] Open
Abstract
Rapid development of versatile layer-by-layer technology has resulted in important breakthroughs in the understanding of the nature of molecular interactions in multilayer assemblies made of polyelectrolytes. Nowadays, polyelectrolyte multilayers (PEM) are considered to be non-equilibrium and highly dynamic structures. High interest in biomedical applications of PEMs has attracted attention to PEMs made of biopolymers. Recent studies suggest that biopolymer dynamics determines the fate and the properties of such PEMs; however, deciphering, predicting and controlling the dynamics of polymers remains a challenge. This review brings together the up-to-date knowledge of the role of molecular dynamics in multilayers assembled from biopolymers. We discuss how molecular dynamics determines the properties of these PEMs from the nano to the macro scale, focusing on its role in PEM formation and non-enzymatic degradation. We summarize the factors allowing the control of molecular dynamics within PEMs, and therefore to tailor polymer multilayers on demand.
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Affiliation(s)
- Jack Campbell
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK;
| | - Anna S. Vikulina
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses, Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
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6
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Advanced drug delivery systems and artificial skin grafts for skin wound healing. Adv Drug Deliv Rev 2019; 146:209-239. [PMID: 30605737 DOI: 10.1016/j.addr.2018.12.014] [Citation(s) in RCA: 303] [Impact Index Per Article: 60.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/27/2018] [Accepted: 12/27/2018] [Indexed: 12/14/2022]
Abstract
Cutaneous injuries, especially chronic wounds, burns, and skin wound infection, require painstakingly long-term treatment with an immense financial burden to healthcare systems worldwide. However, clinical management of chronic wounds remains unsatisfactory in many cases. Various strategies including growth factor and gene delivery as well as cell therapy have been used to enhance the healing of non-healing wounds. Drug delivery systems across the nano, micro, and macroscales can extend half-life, improve bioavailability, optimize pharmacokinetics, and decrease dosing frequency of drugs and genes. Replacement of the damaged skin tissue with substitutes comprising cell-laden scaffold can also restore the barrier and regulatory functions of skin at the wound site. This review covers comprehensively the advanced treatment strategies to improve the quality of wound healing.
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7
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Prakash P, Pahal S, Varma M. Fluorescence Recovery after Photobleaching in Ultrathin Polymer Films. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201700543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Praneet Prakash
- Center for Nano Science and Engineering; Indian Institute of Science; Bangalore 560012 India
| | - Suman Pahal
- Center for Nano Science and Engineering; Indian Institute of Science; Bangalore 560012 India
| | - Manoj Varma
- Center for Nano Science and Engineering; Indian Institute of Science; Bangalore 560012 India
- Robert Bosch Centre for Cyber Physical Systems; Indian Institute of Science; Bangalore 560012 India
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8
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Sustr D, Hlaváček A, Duschl C, Volodkin D. Multi-Fractional Analysis of Molecular Diffusion in Polymer Multilayers by FRAP: A New Simulation-Based Approach. J Phys Chem B 2018; 122:1323-1333. [PMID: 29257689 DOI: 10.1021/acs.jpcb.7b11051] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Comprehensive analysis of the multifractional molecular diffusion provides a deeper understanding of the diffusion phenomenon in the fields of material science, molecular and cell biology, advanced biomaterials, etc. Fluorescence recovery after photobleaching (FRAP) is commonly employed to probe the molecular diffusion. Despite FRAP being a very popular method, it is not easy to assess multifractional molecular diffusion due to limited possibilities of approaches for analysis. Here we present a novel simulation-optimization-based approach (S-approach) that significantly broadens possibilities of the analysis. In the S-approach, possible fluorescence recovery scenarios are primarily simulated and afterward compared with a real measurement while optimizing parameters of a model until a sufficient match is achieved. This makes it possible to reveal multifractional molecular diffusion. Fluorescent latex particles of different size and fluorescein isothiocyanate in an aqueous medium were utilized as test systems. Finally, the S-approach has been used to evaluate diffusion of cytochrome c loaded into multilayers made of hyaluronan and polylysine. Software for evaluation of multifractional molecular diffusion by S-approach has been developed aiming to offer maximal versatility and user-friendly way for analysis.
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Affiliation(s)
- David Sustr
- Faculty of Science, University of Potsdam, Institute of Biochemistry and Biology , Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany.,Department of Molecular and Cellular Bioanalytics, Fraunhofer Institute for Cell Therapy and Immunology (Fraunhofer IZI) , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Antonín Hlaváček
- Institute of Analytical Chemistry of the Czech Academy of Sciences , v. v. i., Veveří 97, Brno 602 00, Czech Republic
| | - Claus Duschl
- Department of Molecular and Cellular Bioanalytics, Fraunhofer Institute for Cell Therapy and Immunology (Fraunhofer IZI) , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Dmitry Volodkin
- Department of Molecular and Cellular Bioanalytics, Fraunhofer Institute for Cell Therapy and Immunology (Fraunhofer IZI) , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany.,School of Science and Technology, Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS, United Kingdom
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9
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He T, Jańczewski D, Guo S, Man SM, Jiang S, Tan WS. Stable pH responsive layer-by-layer assemblies of partially hydrolysed poly(2-ethyl-2-oxazoline) and poly(acrylic acid) for effective prevention of protein, cell and bacteria surface attachment. Colloids Surf B Biointerfaces 2018; 161:269-278. [DOI: 10.1016/j.colsurfb.2017.10.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 09/05/2017] [Accepted: 10/10/2017] [Indexed: 12/21/2022]
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10
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Zahouani S, Hurman L, De Giorgi M, Vigier-Carrière C, Boulmedais F, Senger B, Frisch B, Schaaf P, Lavalle P, Jierry L. Step-by-step build-up of covalent poly(ethylene oxide) nanogel films. NANOSCALE 2017; 9:18379-18391. [PMID: 29147710 DOI: 10.1039/c7nr05424f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hydrogels based on poly(ethylene glycol) (PEG) are commonly used for studies related to cell fate and tissue engineering. Here we present a new covalent layer-by-layer build-up process leading to PEG coatings of nanometer size called "nanogel films". Compared to macroscopic hydrogels, such nanogels should provide a fine control over the structure and the thickness of the coating. Alternated deposition of bifunctional and tetra functional PEG molecules reacting through thiol/maleimide click chemistry is evaluated by quartz crystal microbalance. We first study parameters influencing the build-up process of such coatings and demonstrate the importance of (i) the nature of the first deposited layer, (ii) the PEG concentrations and (iii) the length of the PEG chains that appears to be the most significant parameter influencing film growth. The build-up process can be extended to a large variety of substrates like SiO2 or polymers by using an appropriate anchoring layer. Covalent functionalization of these nanogel films by proteins or enzymes is suited by modifying the biomolecules with thiol or maleimide groups and immobilizing them during the build-up process. Activity of the embedded enzymes can be maintained. Moreover ligands like biotin can be incorporated into the film and recognition by streptavidin can be modulated by playing with the number of PEG layers covering biotin. Compared to well-known PEG hydrogels, these new coatings are promising as they allow to (i) build thin nanometric coatings, (ii) finely control the amount of deposited PEG and (iii) organize the position of the embedded biomolecules inside the film layers.
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Affiliation(s)
- S Zahouani
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 1121, 11 rue Humann, 67085 Strasbourg Cedex, France.
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11
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Prokopovic VZ, Vikulina AS, Sustr D, Shchukina EM, Shchukin DG, Volodkin DV. Binding Mechanism of the Model Charged Dye Carboxyfluorescein to Hyaluronan/Polylysine Multilayers. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38908-38918. [PMID: 29035502 PMCID: PMC5682609 DOI: 10.1021/acsami.7b12449] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Biopolymer-based multilayers become more and more attractive due to the vast span of biological application they can be used for, e.g., implant coatings, cell culture supports, scaffolds. Multilayers have demonstrated superior capability to store enormous amounts of small charged molecules, such as drugs, and release them in a controlled manner; however, the binding mechanism for drug loading into the multilayers is still poorly understood. Here we focus on this mechanism using model hyaluronan/polylysine (HA/PLL) multilayers and a model charged dye, carboxyfluorescein (CF). We found that CF reaches a concentration of 13 mM in the multilayers that by far exceeds its solubility in water. The high loading is not related to the aggregation of CF in the multilayers. In the multilayers, CF molecules bind to free amino groups of PLL; however, intermolecular CF-CF interactions also play a role and (i) endow the binding with a cooperative nature and (ii) result in polyadsorption of CF molecules, as proven by fitting of the adsorption isotherm using the BET model. Analysis of CF mobility in the multilayers by fluorescence recovery after photobleaching has revealed that CF diffusion in the multilayers is likely a result of both jumping of CF molecules from one amino group to another and movement, together with a PLL chain being bound to it. We believe that this study may help in the design of tailor-made multilayers that act as advanced drug delivery platforms for a variety of bioapplications where high loading and controlled release are strongly desired.
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Affiliation(s)
- Vladimir Z. Prokopovic
- Branch Bioanalytics
and Bioprocesses (Fraunhofer IZI-BB), Fraunhofer
Institute for Cell Therapy and Immunology, Am Muehlenberg 13, 14476 Potsdam-Golm, Germany
| | - Anna S. Vikulina
- Branch Bioanalytics
and Bioprocesses (Fraunhofer IZI-BB), Fraunhofer
Institute for Cell Therapy and Immunology, Am Muehlenberg 13, 14476 Potsdam-Golm, Germany
- School of Science and Technology, Nottingham
Trent University, Clifton Lane, NG11 8NS Nottingham, U.K.
- E-mail: . Tel: +44 115 848 8062
| | - David Sustr
- Branch Bioanalytics
and Bioprocesses (Fraunhofer IZI-BB), Fraunhofer
Institute for Cell Therapy and Immunology, Am Muehlenberg 13, 14476 Potsdam-Golm, Germany
| | - Elena M. Shchukina
- Stephenson Institute
for Renewable Energy, University of Liverpool, L69 7ZF Liverpool, U.K.
| | - Dmitry G. Shchukin
- Stephenson Institute
for Renewable Energy, University of Liverpool, L69 7ZF Liverpool, U.K.
| | - Dmitry V. Volodkin
- School of Science and Technology, Nottingham
Trent University, Clifton Lane, NG11 8NS Nottingham, U.K.
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12
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Velk N, Uhlig K, Vikulina A, Duschl C, Volodkin D. Mobility of lysozyme in poly(l-lysine)/hyaluronic acid multilayer films. Colloids Surf B Biointerfaces 2016; 147:343-350. [DOI: 10.1016/j.colsurfb.2016.07.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 06/24/2016] [Accepted: 07/28/2016] [Indexed: 01/13/2023]
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13
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Vikulina AS, Anissimov YG, Singh P, Prokopović VZ, Uhlig K, Jaeger MS, von Klitzing R, Duschl C, Volodkin D. Temperature effect on the build-up of exponentially growing polyelectrolyte multilayers. An exponential-to-linear transition point. Phys Chem Chem Phys 2016; 18:7866-74. [PMID: 26911320 DOI: 10.1039/c6cp00345a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, the effect of temperature on the build-up of exponentially growing polyelectrolyte multilayer films was investigated. It aims at understanding the multilayer growth mechanism as crucially important for the fabrication of tailor-made multilayer films. Model poly(L-lysine)/hyaluronic acid (PLL/HA) multilayers were assembled in the temperature range of 25-85 °C by layer-by-layer deposition using a dipping method. The film growth switches from the exponential to the linear regime at the transition point as a result of limited polymer diffusion into the film. With the increase of the build-up temperature the film growth rate is enhanced in both regimes; the position of the transition point shifts to a higher number of deposition steps confirming the diffusion-mediated growth mechanism. Not only the faster polymer diffusion into the film but also more porous/permeable film structure are responsible for faster film growth at higher preparation temperature. The latter mechanism is assumed from analysis of the film growth rate upon switching of the preparation temperature during the film growth. Interestingly, the as-prepared films are equilibrated and remain intact (no swelling or shrinking) during temperature variation in the range of 25-45 °C. The average activation energy for complexation between PLL and HA in the multilayers calculated from the Arrhenius plot has been found to be about 0.3 kJ mol(-1) for monomers of PLL. Finally, the following processes known to be dependent on temperature are discussed with respect to the multilayer growth: (i) polymer diffusion, (ii) polymer conformational changes, and (iii) inter-polymer interactions.
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Affiliation(s)
- Anna S Vikulina
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK. and Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany. and The Faculty of Fundamental Medicine, Laboratory of Medical Biophysics, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Yuri G Anissimov
- School of Natural Sciences and Micro and Nano Technology Centre, Griffith University, Australia.
| | - Prateek Singh
- Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany. and Laboratory of Developmental Biology, Department of Medical Biochemistry and Molecular Biology, Institute of Biomedicine, University of Oulu, PO Box 5000, 90014 Oulu, Finland.
| | | | - Katja Uhlig
- Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany.
| | - Magnus S Jaeger
- Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany. and Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany.
| | - Regine von Klitzing
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany.
| | - Claus Duschl
- Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany.
| | - Dmitry Volodkin
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK. and Fraunhofer IZI-BB, Am Mühlenberg 13, 14424, Potsdam, Germany.
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14
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Prokopović VZ, Vikulina AS, Sustr D, Duschl C, Volodkin D. Biodegradation-Resistant Multilayers Coated with Gold Nanoparticles. Toward a Tailor-made Artificial Extracellular Matrix. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24345-9. [PMID: 27607839 DOI: 10.1021/acsami.6b10095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Polymer multicomponent coatings such as multilayers mimic an extracellular matrix (ECM) that attracts significant attention for the use of the multilayers as functional supports for advanced cell culture and tissue engineering. Herein, biodegradation and molecular transport in hyaluronan/polylysine multilayers coated with gold nanoparticles were described. Nanoparticle coating acts as a semipermeable barrier that governs molecular transport into/from the multilayers and makes them biodegradation-resistant. Model protein lysozyme (mimics of ECM-soluble signals) diffuses into the multilayers as fast- and slow-diffusing populations existing in an equilibrium. Such a composite system may have high potential to be exploited as degradation-resistant drug-delivery platforms suitable for cell-based applications.
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Affiliation(s)
- Vladimir Z Prokopović
- Fraunhofer Institute for Cell Therapy and Immunology , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- Institute for Biochemistry and Biology, University of Potsdam , Maulbeerallee 2, 14469 Potsdam, Germany
| | - Anna S Vikulina
- Fraunhofer Institute for Cell Therapy and Immunology , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- School of Science and Technology, Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS, United Kingdom
| | - David Sustr
- Fraunhofer Institute for Cell Therapy and Immunology , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- Institute for Biochemistry and Biology, University of Potsdam , Maulbeerallee 2, 14469 Potsdam, Germany
| | - Claus Duschl
- Fraunhofer Institute for Cell Therapy and Immunology , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Dmitry Volodkin
- Fraunhofer Institute for Cell Therapy and Immunology , Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- School of Science and Technology, Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS, United Kingdom
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15
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Zhao J, Swartz LA, Lin WF, Schlenoff PS, Frommer J, Schlenoff JB, Liu GY. Three-Dimensional Nanoprinting via Scanning Probe Lithography-Delivered Layer-by-Layer Deposition. ACS NANO 2016; 10:5656-5662. [PMID: 27203853 DOI: 10.1021/acsnano.6b01145] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three-dimensional (3D) printing has been a very active area of research and development due to its capability to produce 3D objects by design. Miniaturization and improvement of spatial resolution are major challenges in current 3D printing technology development. This work reports advances in miniaturizing 3D printing to the nanometer scale using scanning probe microscopy in conjunction with local material delivery. Using polyelectrolyte polymers and complexes, we have demonstrated the concept of layer-by-layer nanoprinting by design. Nanometer precision is achieved in all three dimensions, as well as in interlayer registry. The approach enables production of designed functional 3D materials with nanometer resolution and, as such, creates a platform for conducting scientific research in designed 3D nanoenvironments as well. In doing so, it enables production of nanomaterials and scaffolds for photonics devices, biomedicine, and tissue engineering.
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Affiliation(s)
| | | | | | | | - Jane Frommer
- IBM Almaden Research Center , 650 Harry Road, San Jose, California 95120, United States
| | - Joseph B Schlenoff
- Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States
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16
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Zahouani S, Chaumont A, Senger B, Boulmedais F, Schaaf P, Jierry L, Lavalle P. Stretch-Induced Helical Conformations in Poly(l-lysine)/Hyaluronic Acid Multilayers. ACS APPLIED MATERIALS & INTERFACES 2016; 8:14958-14965. [PMID: 26646202 DOI: 10.1021/acsami.5b08302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We investigate the effect of stretching on the secondary structure of cross-linked poly(l-lysine)/hyaluronic acid (PLL/HA) multilayers. We show that stretching these films induces changes in the secondary structure of PLL chains. Our results suggest that not only α- but also 310-helices might form in the film under stretching. Such 310-helices have never been observed for PLL so far. These changes of the secondary structure of PLL are reversible, i.e., when returning to the nonstretched state one recovers the initial film structure. Using molecular dynamics simulations of chains composed of 20 l-lysine residues (PLL20), we find that these chains never adopt a helical conformation in water. In contrast, when the end-to-end distance of the chains is restrained to values smaller than the mean end-to-end distance of free chains, a distance domain rarely explored by the free chains, helical conformations become accessible. Moreover, the formation of not only α- but also 310-helices is predicted by the simulations. These results suggest that the change of the end-to-end distance of PLL chains in the stretched film is at the origin of the helix formation.
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Affiliation(s)
- Sarah Zahouani
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth, 67000 Strasbourg, France
| | - Alain Chaumont
- Faculté de Chimie, UMR 7177, Université de Strasbourg , 1 rue Blaise Pascal, 67008 Strasbourg Cedex, France
| | - Bernard Senger
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth, 67000 Strasbourg, France
| | - Fouzia Boulmedais
- Institut Charles Sadron, CNRS UPR 22 , 23 rue du Lœss, 67034 Strasbourg Cedex, France
- University of Strasbourg Institute of Advanced Study , 5 allée du Général Rouvillois, 67083 Strasbourg Cedex, France
| | - Pierre Schaaf
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth, 67000 Strasbourg, France
- Institut Charles Sadron, CNRS UPR 22 , 23 rue du Lœss, 67034 Strasbourg Cedex, France
- University of Strasbourg Institute of Advanced Study , 5 allée du Général Rouvillois, 67083 Strasbourg Cedex, France
| | - Loïc Jierry
- Institut Charles Sadron, CNRS UPR 22 , 23 rue du Lœss, 67034 Strasbourg Cedex, France
- University of Strasbourg Institute of Advanced Study , 5 allée du Général Rouvillois, 67083 Strasbourg Cedex, France
| | - Philippe Lavalle
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth, 67000 Strasbourg, France
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17
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Pahal S, Raichur AM, Varma MM. Subdiffraction-Resolution Optical Measurements of Molecular Transport in Thin Polymer Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5460-5467. [PMID: 27175850 DOI: 10.1021/acs.langmuir.6b00527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The measurement of molecular transport within polymer films yields information about the internal structural organization of the films and is useful in applications such as the design of polymeric capsules for drug delivery. Layer-by-layer assembly of polyelectrolyte multilayer films has been widely used in such applications where the multilayer structure often exhibits anisotropic transport resulting in different diffusivities in the lateral (parallel to the film) and transverse (normal to the film) directions. Although lateral transport can be probed using techniques such as fluorescence recovery after photobleaching (FRAP), it cannot be applied to probing transverse diffusivity in polymer films smaller than the diffraction limit of light. Here we present a technique to probe the transport of molecules tagged with fluorphores in polymer films thinner than the optical diffraction limit using the modulation of fluorescence emission depending on the distance of the tagged molecules from a metal surface. We have used this technique to probe the diffusion of proteins biotin and bovine serum albumin (BSA) in polyelectrolyte multilayer films. We also studied the interdiffusion of chains in multilayer films using this technique. We observed a 3 order of magnitude increase in interdiffusion as a function of the ionic strength of the medium. This technique, along with FRAP, will be useful in studying anisotropic transport in polymer films, even those thinner than the diffraction limit, because the signal in this technique arises only from transverse and not lateral transport. Finally, this technique is also applicable to studying the diffusion of chromophore-labeled species within a polymer film. We demonstrate this aspect by measuring the transverse diffusion of methylene blue in the PAH-PAA multilayer system.
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Affiliation(s)
| | - Ashok M Raichur
- Nanotechnology and Water Sustainability Unit, University of South Africa , Florida 1710, Johannesburg, South Africa
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18
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Knopf-Marques H, Singh S, Htwe SS, Wolfova L, Buffa R, Bacharouche J, Francius G, Voegel JC, Schaaf P, Ghaemmaghami AM, Vrana NE, Lavalle P. Immunomodulation with Self-Crosslinked Polyelectrolyte Multilayer-Based Coatings. Biomacromolecules 2016; 17:2189-98. [DOI: 10.1021/acs.biomac.6b00429] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Helena Knopf-Marques
- INSERM UMR 1121, 11 rue Humann, 67085 Strasbourg, France
- Faculté
de Chirurgie Dentaire, Fédération de Médecine
Translationnelle de Strabourg, Fédération des Matériaux
et Nanosciences d’Alsace, Université de Strasbourg, 3 rue
Sainte Elisabeth, 67000 Strasbourg, France
| | - Sonali Singh
- Division
of Immunology, School of Life Sciences, Faculty of Medicine and Life
Sciences, University of Nottingham, Queen’s Medics, al Centre, Nottingham, NG7 2UH, United Kingdom
| | - Su Su Htwe
- Division
of Immunology, School of Life Sciences, Faculty of Medicine and Life
Sciences, University of Nottingham, Queen’s Medics, al Centre, Nottingham, NG7 2UH, United Kingdom
| | - Lucie Wolfova
- Contipro
a.s.,
Dolni Dobrouc 401 561 02 Dolni Dobrouc, Czech Republic
| | - Radovan Buffa
- Contipro
a.s.,
Dolni Dobrouc 401 561 02 Dolni Dobrouc, Czech Republic
| | - Jalal Bacharouche
- Laboratoire de Chimie Physique et Microbiologie pour l’Environnement CNRS UMR7564, 405 rue de Vandoeuvre, 54600 Villers-les-Nancy, France
| | - Grégory Francius
- Laboratoire de Chimie Physique et Microbiologie pour l’Environnement CNRS UMR7564, 405 rue de Vandoeuvre, 54600 Villers-les-Nancy, France
| | - Jean-Claude Voegel
- INSERM UMR 1121, 11 rue Humann, 67085 Strasbourg, France
- Faculté
de Chirurgie Dentaire, Fédération de Médecine
Translationnelle de Strabourg, Fédération des Matériaux
et Nanosciences d’Alsace, Université de Strasbourg, 3 rue
Sainte Elisabeth, 67000 Strasbourg, France
| | - Pierre Schaaf
- INSERM UMR 1121, 11 rue Humann, 67085 Strasbourg, France
- Faculté
de Chirurgie Dentaire, Fédération de Médecine
Translationnelle de Strabourg, Fédération des Matériaux
et Nanosciences d’Alsace, Université de Strasbourg, 3 rue
Sainte Elisabeth, 67000 Strasbourg, France
- Institut Charles Sadron, CNRS UPR 22, 23 rue du Lœss, 67034 Strasbourg, France
| | - Amir M. Ghaemmaghami
- Division
of Immunology, School of Life Sciences, Faculty of Medicine and Life
Sciences, University of Nottingham, Queen’s Medics, al Centre, Nottingham, NG7 2UH, United Kingdom
| | - Nihal Engin Vrana
- INSERM UMR 1121, 11 rue Humann, 67085 Strasbourg, France
- Protip Medical, 8 Place de l’Hôpital, 67000 Strasbourg, France
| | - Philippe Lavalle
- INSERM UMR 1121, 11 rue Humann, 67085 Strasbourg, France
- Faculté
de Chirurgie Dentaire, Fédération de Médecine
Translationnelle de Strabourg, Fédération des Matériaux
et Nanosciences d’Alsace, Université de Strasbourg, 3 rue
Sainte Elisabeth, 67000 Strasbourg, France
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19
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Almquist BD, Castleberry SA, Sun JB, Lu AY, Hammond PT. Combination Growth Factor Therapy via Electrostatically Assembled Wound Dressings Improves Diabetic Ulcer Healing In Vivo. Adv Healthc Mater 2015; 4:2090-2099. [PMID: 26270898 PMCID: PMC4752932 DOI: 10.1002/adhm.201500403] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 07/14/2015] [Indexed: 12/26/2022]
Abstract
Chronic skin ulcerations are a common complication of diabetes mellitus, affecting up to one in four diabetic individuals. Despite the prevalence of these wounds, current pharmacologic options for treating them remain limited. Growth factor-based therapies have displayed a mixed ability to drive successful healing, which may be due to nonoptimal delivery strategies. Here, a method for coating commercially available nylon dressings using the layer-by-layer process is described to enable both sustained release and independent control over the release kinetics of vascular endothelial growth factor 165 and platelet-derived growth factor BB. It is shown that the use of strategically spaced diffusion barriers formed spontaneously by disulfide bonds enables independent control over the release rates of incorporated growth factors, and that in vivo these dressings improve several aspects of wound healing in db/db mice.
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Affiliation(s)
- Benjamin D Almquist
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Steven A Castleberry
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Julia B Sun
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Alice Y Lu
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Paula T Hammond
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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20
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21
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Skorb EV, Andreeva DV. Self-healing properties of layer-by-layer assembled multilayers. POLYM INT 2015. [DOI: 10.1002/pi.4899] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ekaterina V Skorb
- Max Planck Institute of Colloids and Interfaces; DE-14424 Potsdam Germany
| | - Daria V Andreeva
- Physical Chemistry II; University of Bayreuth; DE-95440 Bayreuth Germany
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22
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Tauzin L, Shuang B, Kisley L, Mansur AP, Chen J, de Leon A, Advincula RC, Landes CF. Charge-dependent transport switching of single molecular ions in a weak polyelectrolyte multilayer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8391-9. [PMID: 24960617 PMCID: PMC4216201 DOI: 10.1021/la5012007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The tunable nature of weak polyelectrolyte multilayers makes them ideal candidates for drug loading and delivery, water filtration, and separations, yet the lateral transport of charged molecules in these systems remains largely unexplored at the single molecule level. We report the direct measurement of the charge-dependent, pH-tunable, multimodal interaction of single charged molecules with a weak polyelectrolyte multilayer thin film, a 10 bilayer film of poly(acrylic acid) and poly(allylamine hydrochloride) PAA/PAH. Using fluorescence microscopy and single-molecule tracking, two modes of interaction were detected: (1) adsorption, characterized by the molecule remaining immobilized in a subresolution region and (2) diffusion trajectories characteristic of hopping (D ∼ 10(-9) cm(2)/s). Radius of gyration evolution analysis and comparison with simulated trajectories confirmed the coexistence of the two transport modes in the same single molecule trajectories. A mechanistic explanation for the probe and condition mediated dynamics is proposed based on a combination of electrostatics and a reversible, pH-induced alteration of the nanoscopic structure of the film. Our results are in good agreement with ensemble studies conducted on similar films, confirm a previously-unobserved hopping mechanism for charged molecules in polyelectrolyte multilayers, and demonstrate that single molecule spectroscopy can offer mechanistic insight into the role of electrostatics and nanoscale tunability of transport in weak polyelectrolyte multilayers.
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Affiliation(s)
- Lawrence
J. Tauzin
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
| | - Bo Shuang
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
| | - Lydia Kisley
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
| | - Andrea P. Mansur
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
| | - Jixin Chen
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
| | - Al de Leon
- Department
of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Rigoberto C. Advincula
- Department
of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Christy F. Landes
- Department
of Chemistry and Department of Electrical and Chemical Engineering, Rice University, Houston, Texas 77251, United States
- E-mail:
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23
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Vrana NE, Erdemli O, Francius G, Fahs A, Rabineau M, Debry C, Tezcaner A, Keskin D, Lavalle P. Double entrapment of growth factors by nanoparticles loaded into polyelectrolyte multilayer films. J Mater Chem B 2014; 2:999-1008. [DOI: 10.1039/c3tb21304h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Ghostine RA, Markarian MZ, Schlenoff JB. Asymmetric Growth in Polyelectrolyte Multilayers. J Am Chem Soc 2013; 135:7636-46. [DOI: 10.1021/ja401318m] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ramy A. Ghostine
- Department of Chemistry
and Biochemistry, The Florida State University, Tallahassee, Florida
32306-4390, United States
| | - Marie Z. Markarian
- Department of Chemistry
and Biochemistry, The Florida State University, Tallahassee, Florida
32306-4390, United States
| | - Joseph B. Schlenoff
- Department of Chemistry
and Biochemistry, The Florida State University, Tallahassee, Florida
32306-4390, United States
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25
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Ma Y, Dong J, Bhattacharjee S, Wijeratne S, Bruening ML, Baker GL. Increased protein sorption in poly(acrylic acid)-containing films through incorporation of comb-like polymers and film adsorption at low pH and high ionic strength. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:2946-54. [PMID: 23351043 PMCID: PMC3727236 DOI: 10.1021/la305137m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In principle, incorporation of comb-like block copolymers in multilayer polyelectrolyte films can both increase film thickness relative to coatings containing linear polymers and provide more swollen films for increased sorption of proteins. In the absence of added salt, alternating adsorption of 5 bilayers of protonated poly(allylamine) (PAH) and comb-like poly(2-hydroxyethyl methacrylate)-graft-poly(acrylic acid) (PHEMA-g-PAA) leads to ∼2-fold thicker coatings than adsorption of PAH and linear PAA, and the difference in the thicknesses of the two coatings increases with the number of bilayers. Moreover, the (PAH/PHEMA-g-PAA)n films sorb 2- to 4-fold more protein than corresponding films prepared with linear PAA, and coatings deposited at pH 3.0 sorb more protein than coatings adsorbed at pH 5.0, 7.0, or 9.0. In fact changes in deposition pH and addition of 0.5 M NaCl to polyelectrolyte adsorption solutions alter protein sorption more dramatically than variations in the constituent polymer architecture. When deposited from 0.5 M NaCl at pH 3.0, both (PAH/PHEMA-g-PAA)5 and (PAH/PAA)5 films increase in thickness more than 400% upon adsorption of lysozyme. These films contain a high concentration of free -COOH groups, and subsequent deprotonation of these groups at neutral pH likely contributes to increased protein binding. Lysozyme sorption stabilizes these films, as without lysozyme films deposited at pH 3.0 from 0.5 M NaCl desorb at neutral pH. Films deposited at pH 9.0 from 0.5 M NaCl are more stable and also bind large amounts of lysozyme. The high binding capacities of these films make them attractive for potential applications in protein isolation or immobilization of enzymes.
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Affiliation(s)
| | | | | | - Salinda Wijeratne
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Merlin L. Bruening
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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26
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Skorb EV, Andreeva DV. Layer-by-Layer approaches for formation of smart self-healing materials. Polym Chem 2013. [DOI: 10.1039/c3py00088e] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Abstract
Polyelectrolyte multilayer films are a versatile functionalization method of surfaces and rely on the alternated adsorption of oppositely charged species. Among such species, charged dyes can also be alternated with oppositely charged polymers, which is challenging from a fundamental point of view, because polyelectrolytes require a minimal number of charges, whereas even monovalent dyes can be incorporated during the alternated adsorption process. We will not only focus on organic dyes but also on their inorganic counterparts and on metal complexes. Such films offer plenty of possible applications in dye sensitized solar cells. In addition, dyes are massively used in the textile industry and in histology to stain textile fibers or tissues. However, the excess of non bound dyes poses serious environmental problems. It is hence of the highest interest to design materials able to adsorb such dyes in an almost irreversible manner. Polyelectrolyte multilayer films, owing to their ion exchange behavior can be useful for such a task allowing for impressive overconcentration of dyes with respect to the dye in solution. The actual state of knowledge of the interactions between charged dyes and adsorbed polyelectrolytes is the focus of this review article.
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Affiliation(s)
- Vincent Ball
- Institut National de la Santé et de la Recherche Médicale, UMR 1121, 11 rue Humann, Strasbourg Cédex 67085, France; E-Mail: ; Tel.: +33-3-90-24-32-58; Fax: +33-3-90-24-33-79
- Faculté de Chirurgie Dentaire, Université de Strasbourg, 1 Place de l'Hôpital, Strasbourg 67000, France
- Fédération de Médecine Translationelle de Strasbourg, 1 Place de l'Hôpital, Strasbourg 67000, France
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