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Iqbal MH, Kerdjoudj H, Boulmedais F. Protein-based layer-by-layer films for biomedical applications. Chem Sci 2024; 15:9408-9437. [PMID: 38939139 PMCID: PMC11206333 DOI: 10.1039/d3sc06549a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 05/03/2024] [Indexed: 06/29/2024] Open
Abstract
The surface engineering of biomaterials is crucial for their successful (bio)integration by the body, i.e. the colonization by the tissue-specific cell, and the prevention of fibrosis and/or bacterial colonization. Performed at room temperature in an aqueous medium, the layer-by-layer (LbL) coating method is based on the alternating deposition of macromolecules. Versatile and simple, this method allows the functionalization of surfaces with proteins, which play a crucial role in several biological mechanisms. Possessing intrinsic properties (cell adhesion, antibacterial, degradable, etc.), protein-based LbL films represent a powerful tool to control bacterial and mammalian cell fate. In this article, after a general introduction to the LbL technique, we will focus on protein-based LbL films addressing different biomedical issues/domains, such as bacterial infection, blood contacting surfaces, mammalian cell adhesion, drug and gene delivery, and bone and neural tissue engineering. We do not consider biosensing applications or electrochemical aspects using specific proteins such as enzymes.
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Affiliation(s)
- Muhammad Haseeb Iqbal
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, Strasbourg Cedex 2 67034 France
| | | | - Fouzia Boulmedais
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, Strasbourg Cedex 2 67034 France
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2
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Hong WX, Shevtsov VY, Shieh YT. Preparation of pH-responsive poly(methyl methacrylate) nanoparticles with CO2-triggered aggregation. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03202-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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3
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Shevtsov V, Hsin TY, Shieh YT. Preparation of amphiphilic copolymers via base-catalyzed hydrolysis of quaternized poly[2-(dimethylamino)ethyl methacrylate]. Polym Chem 2022. [DOI: 10.1039/d1py01697k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The multi-stimuli-responsiveness of tertiary amine-containing polyacrylates makes them highly attractive for use in a wide range of applications. In the last decade, poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) has received exceptionally large attention...
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Argaiz M, Ruipérez F, Aguirre M, Tomovska R. Ionic Inter-Particle Complexation Effect on the Performance of Waterborne Coatings. Polymers (Basel) 2021; 13:3098. [PMID: 34578000 PMCID: PMC8470605 DOI: 10.3390/polym13183098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 01/18/2023] Open
Abstract
The performance of waterborne (meth)acrylic coatings is critically affected by the film formation process, in which the individual polymer particles must join to form a continuous film. Consequently, the waterborne polymers present lower performance than their solvent-borne counter-polymers. To decrease this effect, in this work, ionic complexation between oppositely charged polymer particles was introduced and its effect on the performance of waterborne polymer films was studied. The (meth)acrylic particles were charged by the addition of a small amount of ionic monomers, such as sodium styrene sulfonate and 2-(dimethylamino)ethyl methacrylate. Density functional theory calculations showed that the interaction between the selected main charges of the respective functional monomers (sulfonate-amine) is favored against the interactions with their counter ions (sulfonate-Na and amine-H). To induce ionic complexation, the oppositely charged latexes were blended, either based on the same number of charges or the same number of particles. The performance of the ionic complexed coatings was determined by means of tensile tests and water uptake measurements. The ionic complexed films were compared with reference films obtained at pH at which the cationic charges were in neutral form. The mechanical resistance was raised slightly by ionic bonding between particles, producing much more flexible films, whereas the water penetration within the polymeric films was considerably hindered. By exploring the process of polymer chains interdiffusion using Fluorescence Resonance Energy Transfer (FRET) analysis, it was found that the ionic complexation was established between the particles, which reduced significantly the interdiffusion process of polymer chains. The presented ionic complexes of sulfonate-amine functionalized particles open a promising approach for reinforcing waterborne coatings.
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Affiliation(s)
- Maialen Argaiz
- POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea, 72, 20018 Donostia-San Sebastián, Spain; (M.A.); (M.A.)
| | - Fernando Ruipérez
- POLYMAT and Physical Chemistry Department, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain;
| | - Miren Aguirre
- POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea, 72, 20018 Donostia-San Sebastián, Spain; (M.A.); (M.A.)
| | - Radmila Tomovska
- POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea, 72, 20018 Donostia-San Sebastián, Spain; (M.A.); (M.A.)
- Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
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5
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Aliakseyeu A, Albright V, Yarbrough D, Hernandez S, Zhou Q, Ankner JF, Sukhishvili SA. Selective hydrogen bonding controls temperature response of layer-by-layer upper critical solution temperature micellar assemblies. SOFT MATTER 2021; 17:2181-2190. [PMID: 33458733 DOI: 10.1039/d0sm01997f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This work establishes a correlation between the selectivity of hydrogen-bonding interactions and the functionality of micelle-containing layer-by-layer (LbL) assemblies. Specifically, we explore LbL films formed by assembly of poly(methacrylic acid) (PMAA) and upper critical solution temperature block copolymer micelles (UCSTMs) composed of poly(acrylamide-co-acrylonitrile) P(AAm-co-AN) cores and polyvinylpyrrolidone (PVP) coronae. UCSTMs had a hydrated diameter of ∼380 nm with a transition temperature between 45 and 50 °C, regardless of solution pH. Importantly, micelles were able to hydrogen-bond with PMAA, with the critical interaction pH being temperature dependent. To better understand the thermodynamic nature of these interactions, in depth studies using isothermal titration calorimetry (ITC) were conducted. ITC reveals opposite signs of enthalpies for binding of PMAA with micellar coronae vs. with the cores. Moreover, ITC indicates that pH directs the interactions of PMAA with micelles, selectively enabling binding with the micellar corona at pH 4 or with both the corona and the core at pH 3. We then explore UCSTM/PMAA LbL assemblies and show that the two distinct modes of PMAA interaction with the micelles (i.e. whether or not PMAA binds with the core) had significant effects on the film composition, structure, and functionality. Consistent with PMAA hydrogen bonding with the P(AAm-co-AN) micellar cores, a significantly higher fraction of PMAA was found within the films assembled at pH 3 compared to pH 4 by both spectroscopic ellipsometry and neutron reflectometry. Selective interaction of PMAA with PVP coronae of the assembled micelles, achieved by the emergence of partial ionization of PMAA at pH 4 was critical for preserving film functionality demonstrated as temperature-controlled swelling and release of a model small molecule, pyrene. The work done here can be applied to a multitude of assembled polymer systems in order to predict suppression/retention of their stimuli-responsive behavior.
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Affiliation(s)
- Aliaksei Aliakseyeu
- Department of Materials Science & Engineering, Texas A&M University, TX 77843, USA.
| | - Victoria Albright
- Department of Materials Science & Engineering, Texas A&M University, TX 77843, USA.
| | - Danielle Yarbrough
- Department of Materials Science & Engineering, Texas A&M University, TX 77843, USA.
| | | | - Qing Zhou
- Department of Materials Science & Engineering, Texas A&M University, TX 77843, USA.
| | - John F Ankner
- Spallation Neutron Source, Oak Ridge National Laboratory, 37831, TN, USA
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vander Straeten A, Lefèvre D, Demoustier-Champagne S, Dupont-Gillain C. Protein-based polyelectrolyte multilayers. Adv Colloid Interface Sci 2020; 280:102161. [PMID: 32416541 DOI: 10.1016/j.cis.2020.102161] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/12/2022]
Abstract
The immobilization of proteins to impart specific functions to surfaces is topical for chemical engineering, healthcare and diagnosis. Layer-by-Layer (LbL) self-assembly is one of the most used method to immobilize macromolecules on surfaces. It consists in the alternate adsorption of oppositely charged species, resulting in the formation of a multilayer. This method in principle allows any charged object to be immobilized on any surface, from aqueous solutions. However, when it comes to proteins, the promises of versatility, simplicity and universality that the LbL approach holds are unmet due to the heterogeneity of protein properties. In this review, the literature is analyzed to make a generic approach emerge, with a view to facilitate the LbL assembly of proteins with polyelectrolytes (PEs). In particular, this review aims at guiding the choice of the PE and the building conditions that lead to the successful growth of protein-based multilayered self-assemblies.
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Highly sensitive label-free bio-interfacial colorimetric sensor based on silk fibroin-gold nanocomposite for facile detection of chlorpyrifos pesticide. Sci Rep 2020; 10:4198. [PMID: 32144298 PMCID: PMC7060252 DOI: 10.1038/s41598-020-61130-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/21/2020] [Indexed: 11/17/2022] Open
Abstract
Herein, the preparation of gold nanoparticles-silk fibroin (SF-AuNPs) dispersion and its label-free colorimetric detection of the organophosphate pesticide, namely chlorpyrifos, at ppb level are reported. The silk fibroin solution was extracted from B. mori silk after performing degumming, dissolving and dialysis steps. This fibroin solution was used for synthesis of gold nanoparticles in-situ without using any external reducing and capping agent. X-ray Diffractometry (XRD), Field Emission Transmission Electron Microscopy (FETEM) along with Surface Plasmon Resonance based optical evaluation confirmed generation of gold nanoparticles within SF matrix. The resultant SF-AuNPs dispersion exhibited rapid and excellent colorimetric pesticide sensing response even at 10 ppb concentration. Effect of additional parameters viz. pH, ionic concentration and interference from other pesticide samples was also studied. Notably, SF-AuNPs dispersion exhibited selective colorimetric pesticide sensing response which can be calibrated. Furthermore, this method was extended to various simulated real life samples such as tap water, soil and agricultural products including plant residues to successfully detect the presence of chlorpyrifos pesticide. The proposed colorimetric sensor system is facile yet effective and can be employed by novice rural population and expert researchers alike. It can be exploited as preliminary tool for label-free colorimetric chlorpyrifos pesticide sensing in water and agricultural products.
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Zamrik I, Bayat H, Alhusaini Q, Raoufi M, Schönherr H. In Situ Study of Layer-by-Layer Polyelectrolyte Deposition in Nanopores of Anodic Aluminum Oxide by Reflectometric Interference Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1907-1915. [PMID: 32009415 DOI: 10.1021/acs.langmuir.9b03769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The modification of cylindrical anodic aluminum oxide (AAO) nanopores by alternating layer-by-layer (LBL) deposition of poly(sodium-4-styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) was studied in situ by reflectometric interference spectroscopy (RIfS). In particular, the kinetics of polyelectrolyte deposition inside the pores with a diameter of 37 ± 3 nm and a length of 3.7 ± 0.3 μm were unraveled, and potential differences in the LBL multilayer growth compared to flat silicon substrates as well as the effect of different ionic strengths and different types of ions were investigated. RIfS measures the effective optical thicknesses, which is-for a constant pore length-proportional to the effective refractive index of the AAO sample, from which, in turn, the deposited mass of the polymer or the corresponding layer thickness can be estimated. Compared to the multilayer growth by the LBL deposition on the flat aminosilane-primed silicon wafers, which was assessed by spectroscopic ellipsometry, the thickness increment per deposited bilayer, as well as the dependence of this increment on the ionic strength (0.01-0.15) and the counterion type (Na+ vs Ca2+) inside the aminosilane-primed nanopores, was for the first bilayers to within the experimental error identical. For thicker multilayers, the pore diameter became smaller, which led to reduced thickness increments and eventually virtually completely filled the pores. The observed kinetics is consistent with the mass-transport-limited adsorption of the polyelectrolyte to the charged surface according to a Langmuir isotherm with a negligible desorption rate. In addition to fundamental insights into the buildup of polyelectrolyte multilayers inside the AAO nanopores, our results highlight the sensitivity of RIfS and its use as an analytical tool for probing processes inside the nanopores and for the development of biosensors.
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Affiliation(s)
- Imad Zamrik
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Haider Bayat
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Qasim Alhusaini
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Mohammad Raoufi
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, 1416753955Tehran, Iran
| | - Holger Schönherr
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
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9
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Markovic MD, Spasojevic PM, Seslija SI, Popovic IG, Veljovic DN, Pjanovic RV, Panic VV. Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Vander Straeten A, Bratek-Skicki A, Jonas AM, Fustin CA, Dupont-Gillain C. Integrating Proteins in Layer-by-Layer Assemblies Independently of their Electrical Charge. ACS NANO 2018; 12:8372-8381. [PMID: 29965727 DOI: 10.1021/acsnano.8b03710] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Layer-by-layer (LbL) assembly is an attractive method for protein immobilization at interfaces, a much wanted step for biotechnologies and biomedicine. Integrating proteins in LbL thin films is however very challenging due to their low conformational entropy, heterogeneous spatial distribution of charges, and polyampholyte nature. Protein-polyelectrolyte complexes (PPCs) are promising building blocks for LbL construction owing to their standardized charge and polyelectrolyte (PE) corona. In this work, lysozyme was complexed with poly(styrenesulfonate) (PSS) at different ionic strengths and pH values. The PPCs size and electrical properties were investigated, and the forces driving complexation were elucidated, in the light of computations of polyelectrolyte conformation, with a view to further unravel LbL construction mechanisms. Quartz crystal microbalance and atomic force microscopy were used to monitor the integration of PPCs compared to the one of bare protein molecules in LbL assemblies, and colorimetric assays were performed to determine the protein amount in the thin films. Layers built with PPCs show higher protein contents and hydration levels. Very importantly, the results also show that LbL construction with PPCs mainly relies on standard PE-PE interactions, independent of the charge state of the protein, in contrast to classical bare protein assembly with PEs. This considerably simplifies the incorporation of proteins in multilayers, which will be beneficial for biosensing, heterogeneous biocatalysis, biotechnologies, and medical applications that require active proteins at interfaces.
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Affiliation(s)
- Aurélien Vander Straeten
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Anna Bratek-Skicki
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Alain M Jonas
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Charles-André Fustin
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
| | - Christine Dupont-Gillain
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , Place Louis Pasteur, 1 bte L4.01.10 , B-1348 Louvain-la-Neuve , Belgium
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11
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Romano EF, Holdsworth CI, Quirino JP, So RC. Room temperature synthesis and binding studies of solution-processable histamine-imprinted microspheres. J Mol Recognit 2017; 31. [PMID: 28872251 DOI: 10.1002/jmr.2659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 06/29/2017] [Accepted: 08/02/2017] [Indexed: 11/08/2022]
Abstract
Accurate quantification of histamine levels in food and in biological samples is important for monitoring the quality of food products and for the detection of pathophysiological conditions. In this study, solution processable histamine-imprinted microspheres were synthesized at 30°C via dilute free radical phototochemical polymerization technique using ethylene glycol dimethacrylate (EGDMA) as the crosslinker and methacrylic acid (MAA) as the monomer. The processability of the resulting polymer is dictated by the monomer feed concentration (eg, 4 wt% 80:20 EGDMA:MAA formulation) and solvent (acetonitrile). Whereas, the particle size is influenced by the monomer feed concentration, the presence of template molecule, and independent of the crosslinker content. Evaluation of the binding performance of the photochemically imprinted polymers (PCP) with different crosslinker content (80 and 90 wt%) indicated that the selective binding capacity was notably higher in PCP-80 (N= 16.0 μmol/g) compared to PCP-90 (N= 10.1 μmol/g) when analyzed via frontal analysis capillary electrophoresis (FACE) using Freundlich isotherm. In addition, PCP-80 microspheres are more selective toward histamine than conventional thermal polymers (CTP-80) prepared at 60°C in the presence of structural analogs such as histidine, imidazole, and tryptamine under cross-rebinding and competitive conditions. These results demonstrated that histamine-selective imprinted polymers can be obtained readily using room temperature photochemical polymerization where these materials can be subsequently used as recognition element for optical-based histamine sensing.
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Affiliation(s)
- Edwin F Romano
- Department of Chemistry, Ateneo de Manila University, Quezon City, Philippines.,Department of Chemistry, College of Arts and Sciences, Negros Oriental State University, Dumaguete City, Philippines
| | - Clovia I Holdsworth
- School of Environmental and Life Sciences, Chemistry Building-C218, University of Newcastle, Callaghan, New South Wales, Australia
| | - Joselito P Quirino
- Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia
| | - Regina C So
- Department of Chemistry, Ateneo de Manila University, Quezon City, Philippines
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12
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Hanauer N, Latreille PL, Banquy X. Mechanistic Insights into the Directed Assembly of Hydrogel Blocks Mediated by Polyelectrolytes or Microgels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3864-3870. [PMID: 28318268 DOI: 10.1021/acs.langmuir.7b00924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, we report the directed assembly of hydrogel blocks mediated by electrostatic interactions. We compared two different assembly mechanisms, one mediated by microgel particles and another mediated by direct interaction between oppositely charged blocks. The system consisted of hydrogel blocks made of an interpenetrated network of (hydroxyethyl)methacrylate-poly(ethylene glycol)dimethacrylate (HEMA-PEGDMA) and either positively charged polyethylenimine (PEI) or negatively charged hyaluronic acid (HA). Positively charged hydrogel blocks were pretreated with negatively charged microgel particles (MG) made of N-isopropylacrylamide-methacrylic acid. Both systems (PEI/HA and PEI/MG) demonstrated spontaneous directed assembly, meaning that positive blocks were systematically found in contact with oppositely charged blocks. Directed assembly in water of PEI/HA blocks resulted in large and open aggregates, while PEI/MG blocks exhibited more compact aggregates. Effects of salt and pH were also assessed for both systems. Inhibition of blocks aggregation was found to appear above a critical salt concentration (CSalt*) which was significantly higher for the PEI/HA system (80 mM) compared to the PEI/MG system (5-20 mM). The observed difference was interpreted in terms of the nanostructure of the contact area between blocks. Blocks aggregation was also found to be controlled by the content of negatively charged groups in the microgels as well as the concentration of MG in the suspension (CMG) used to treat the hydrogel block surfaces. Our results shine light on the subtle differences underlying the adhesion mechanisms between hydrogel blocks and suggest new routes toward the design of innovative complex soft materials.
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Affiliation(s)
- Nicolas Hanauer
- Canada Research Chair in Bio-inspired Materials and Interfaces, Faculty of Pharmacy, Université de Montréal C.P. 6128, succursale Centre Ville, Montréal, QC H3C 3J7, Canada
| | - Pierre Luc Latreille
- Canada Research Chair in Bio-inspired Materials and Interfaces, Faculty of Pharmacy, Université de Montréal C.P. 6128, succursale Centre Ville, Montréal, QC H3C 3J7, Canada
| | - Xavier Banquy
- Canada Research Chair in Bio-inspired Materials and Interfaces, Faculty of Pharmacy, Université de Montréal C.P. 6128, succursale Centre Ville, Montréal, QC H3C 3J7, Canada
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Romano EF, Quirino JP, Holdsworth JL, So RC, Holdsworth CI. Assessment of the binding performance of histamine-imprinted microspheres by frontal analysis capillary electrophoresis. Electrophoresis 2017; 38:1251-1259. [PMID: 28258613 DOI: 10.1002/elps.201600448] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 02/16/2017] [Accepted: 02/24/2017] [Indexed: 11/09/2022]
Abstract
Frontal analysis capillary electrophoresis was used to evaluate the binding performance of molecularly imprinted microspheres (MIM) toward its template histamine and analogs at pH 7, and compared to the high performance liquid chromatographic method. In both methods, batch binding was employed and the binding parameters were calculated from the measured concentration of unbound amine analytes and afforded comparable histamine equilibrium dissociation constants (Kd ∼ 0.4 mM). FACE was easily carried out at shorter binding equilibration time (i.e. 30 min) and without the need to separate the microspheres, circumventing laborious and, in the case of the system under study, inefficient sample filtration. It also allowed for competitive binding studies by virtue of its ability to distinctly separate intact microspheres and all tested amines which could not be resolved in HPLC. Kd 's for nonimprinted (control) microspheres (NIM) from FACE and HPLC were also comparable (∼ 0.6 mM) but at higher histamine concentrations, HPLC gave lower histamine binding. This discrepancy was attributed to inefficient filtration of the batch binding samples prior to HPLC analysis resulting in an over-estimation of the concentration of free histamine brought about by the presence of unfiltered histamine-bound microspheres.
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Affiliation(s)
- Edwin F Romano
- Department of Chemistry, School of Science and Engineering, Ateneo de Manila University, Quezon City, Philippines.,Department of Chemistry, College of Arts and Sciences, Negros Oriental State University, Dumaguete City, Philippines
| | - Joselito P Quirino
- Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia
| | - John L Holdsworth
- School of Mathematical and Physical Sciences, University of Newcastle, Newcastle, NSW, Australia
| | - Regina C So
- Department of Chemistry, School of Science and Engineering, Ateneo de Manila University, Quezon City, Philippines
| | - Clovia I Holdsworth
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Newcastle, NSW, Australia
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de Lima CRM, de Souza PRS, Stopilha RT, de Morais WA, Silva GTM, Nunes JS, Wanderley Neto AO, Pereira MR, Fonseca JLC. Formation and structure of chitosan–poly(sodium methacrylate) complex nanoparticles. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1296772] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- C. R. M. de Lima
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - P. R. S. de Souza
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - R. T. Stopilha
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - W. A. de Morais
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - G. T. M. Silva
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - J. S. Nunes
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - A. O. Wanderley Neto
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - M. R. Pereira
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
| | - J. L. C. Fonseca
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, Brazil
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15
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Silva JM, Reis RL, Mano JF. Biomimetic Extracellular Environment Based on Natural Origin Polyelectrolyte Multilayers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4308-42. [PMID: 27435905 DOI: 10.1002/smll.201601355] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/15/2016] [Indexed: 05/23/2023]
Abstract
Surface modification of biomaterials is a well-known approach to enable an adequate biointerface between the implant and the surrounding tissue, dictating the initial acceptance or rejection of the implantable device. Since its discovery in early 1990s layer-by-layer (LbL) approaches have become a popular and attractive technique to functionalize the biomaterials surface and also engineering various types of objects such as capsules, hollow tubes, and freestanding membranes in a controllable and versatile manner. Such versatility enables the incorporation of different nanostructured building blocks, including natural biopolymers, which appear as promising biomimetic multilayered systems due to their similarity to human tissues. In this review, the potential of natural origin polymer-based multilayers is highlighted in hopes of a better understanding of the mechanisms behind its use as building blocks of LbL assembly. A deep overview on the recent progresses achieved in the design, fabrication, and applications of natural origin multilayered films is provided. Such films may lead to novel biomimetic approaches for various biomedical applications, such as tissue engineering, regenerative medicine, implantable devices, cell-based biosensors, diagnostic systems, and basic cell biology.
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Affiliation(s)
- Joana M Silva
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - Rui L Reis
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - João F Mano
- 3Bs Research Group-Biomaterials Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory Braga/Guimarães, Portugal
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16
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Probing the surface microstructure of layer-by-layer self-assembly chitosan/poly( l -glutamic acid) multilayers: A grazing-incidence small-angle X-ray scattering study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:352-8. [DOI: 10.1016/j.msec.2015.08.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 08/18/2015] [Accepted: 08/25/2015] [Indexed: 01/05/2023]
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17
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18
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Soranzo T, Cortès S, Gilde F, Kreir M, Picart C, Lenormand JL. Functional characterization of p7 viroporin from hepatitis C virus produced in a cell-free expression system. Protein Expr Purif 2015; 118:83-91. [PMID: 26477501 DOI: 10.1016/j.pep.2015.10.004] [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: 08/04/2015] [Revised: 09/21/2015] [Accepted: 10/09/2015] [Indexed: 01/05/2023]
Abstract
Using a cell-free expression system we produced the p7 viroporin embedded into a lipid bilayer in a single-step manner. The protein quality was assessed using different methods. We examined the channel forming activity of p7 and verified its inhibition by 5-(N,N-Hexamethylene) amiloride (HMA). Fourier transformed infrared spectroscopy (FTIR) experiments further showed that when p7 was inserted into synthetic liposomes, the protein displayed a native-like conformation similar to p7 obtained from other sources. Photoactivable amino acid analogs used for p7 protein synthesis enabled oligomerization state analysis in liposomes by cross-linking. Therefore, these findings emphasize the quality of the cell-free produced p7 proteoliposomes which can benefit the field of the hepatitis C virus (HCV) protein production and characterization and also provide tools for the development of new inhibitors to reinforce our therapeutic arsenal against HCV.
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Affiliation(s)
- Thomas Soranzo
- Synthelis SAS, 5 avenue du Grand Sablon, 38700, La Tronche, France; TheREx Laboratory, TIMC-IMAG, UMR 5525, CNRS /UJF, University Joseph Fourier, UFR de Médecine, 38706, La Tronche, France
| | - Sandra Cortès
- Synthelis SAS, 5 avenue du Grand Sablon, 38700, La Tronche, France
| | - Flora Gilde
- CNRS, UMR 5628 (LMGP), 3 parvis Louis Néel, 38016, Grenoble, France; University of Grenoble Alpes, Grenoble Institute of Technology, 38016, Grenoble, France
| | - Mohamed Kreir
- Nanion Technologies GmbH, Gabrielenstraβe 9, 80636, Munich, Germany
| | - Catherine Picart
- CNRS, UMR 5628 (LMGP), 3 parvis Louis Néel, 38016, Grenoble, France; University of Grenoble Alpes, Grenoble Institute of Technology, 38016, Grenoble, France
| | - Jean-Luc Lenormand
- TheREx Laboratory, TIMC-IMAG, UMR 5525, CNRS /UJF, University Joseph Fourier, UFR de Médecine, 38706, La Tronche, France.
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19
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Zavgorodnya O, Kozlovskaya V, Kharlampieva E. Nanostructured highly-swollen hydrogels: Complexation with amino acids through copper (II) ions. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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20
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An D, Zhao D, Li X, Lu X, Qiu G, Shea KJ. Synthesis of surfactant-free hydroxypropylcellulose nanogel and its dual-responsive properties. Carbohydr Polym 2015; 134:385-9. [PMID: 26428138 DOI: 10.1016/j.carbpol.2015.08.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 01/24/2023]
Abstract
Surfactant-free hydroxypropylcellulose (HPC) nanogels were synthesized by using thermo-sensitive HPC as a template to form HPC/PMAA nanoscale complex. The formation mechanism was owing to the interpolymer hydrogen bonding between HPC and PMAA induced phase transition of HPC in aqueous media. The average size of the resulting HPC nanogels ranges from about 98 to 241 nm. It was found that the average size of HPC nanogels changed little with increasing polymerization temperature below 26 °C, whereas it greatly increased above 26 °C. When the concentration of HPC was increased from 0.1 to 0.9 wt.%, the diameter of nanogels decreased firstly and then increased. Besides, an increasing crosslinker BIS concentration led to a reduced size of HPC nanogels, and the nanogels had the narrowest size distribution when its concentration was 0.1 wt.%. In addition to intrinsic thermo-sensitivity, HPC nanogels also display pH-induced phase transition due to pH-responsive PMAA contained in HPC nanogels. Surfactant-free, dual-responsive HPC nanogels would have promising applications in biotechnology and nanomedicine.
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Affiliation(s)
- Dong An
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, People's Republic of China
| | - Di Zhao
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, People's Republic of China
| | - Xueting Li
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, People's Republic of China
| | - Xihua Lu
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, People's Republic of China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Shanghai 201620, People's Republic of China.
| | - Gao Qiu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Shanghai 201620, People's Republic of China
| | - Kenneth J Shea
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
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21
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Kilan K, Warszyński P. Thickness and permeability of multilayers containing alginate cross-linked by calcium ions. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.08.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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22
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Hsu BB, Hagerman SR, Jamieson K, Veselinovic J, O'Neill N, Holler E, Ljubimova JY, Hammond PT. Multilayer films assembled from naturally-derived materials for controlled protein release. Biomacromolecules 2014; 15:2049-57. [PMID: 24825478 DOI: 10.1021/bm5001839] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Herein we designed and characterized films composed of naturally derived materials for controlled release of proteins. Traditional drug delivery strategies rely on synthetic or semisynthetic materials or utilize potentially denaturing assembly conditions that are not optimal for sensitive biologics. Layer-by-layer (LbL) assembly of films uses benign conditions and can generate films with various release mechanisms including hydrolysis-facilitated degradation. These use components such as synthetic polycations that degrade into non-natural products. Herein we report the use of a naturally derived, biocompatible and degradable polyanion, poly(β-l-malic acid), alone and in combination with chitosan in an LbL film, whose degradation products of malic acid and chitosan are both generally recognized as safe (GRAS) by the FDA. We have found that films based on this polyanion have shown sustained release of a model protein, lysozyme that can be timed from tens of minutes to multiple days through different film architectures. We also report the incorporation and release of a clinically used biologic, basic fibroblast growth factor (bFGF), which demonstrates the use of this strategy as a platform for controlled release of various biologics.
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Affiliation(s)
- Bryan B Hsu
- Departments of Chemistry and §Chemical Engineering, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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23
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Salehi R, Irani M, Eskandani M, Nowruzi K, Davaran S, Haririan I. Interaction, Controlled Release, and Antitumor Activity of Doxorubicin Hydrochloride From pH-Sensitive P(NIPAAm-MAA-VP) Nanofibrous Scaffolds Prepared by Green Electrospinning. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2013.854234] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Les KA, Mohamed-Ahmed AHA, Balan S, Choi JW, Martin D, Yardley V, Powell K, Godwin A, Brocchini S. Poly(methacrylic acid) complexation of amphotericin B to treat neglected diseases. Polym Chem 2014. [DOI: 10.1039/c3py01051a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Lee JH, Hwang HJ, Bhak G, Jang Y, Paik SR, Char K. In Situ Fibril Formation of κ-Casein by External Stimuli within Multilayer Thin Films. ACS Macro Lett 2013; 2:688-693. [PMID: 35606953 DOI: 10.1021/mz400276f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have developed the in situ fibrillation of κ-casein, employed as amyloid precursor, within multilayer films consisting of κ-casein and poly(acrylic acid) (PAA) prepared by the layer-by-layer (LbL) deposition. The fibrillation of κ-casein within the multilayered films is strongly dependent on the extent of intermolecular interactions between κ-casein and PAA. When films constructed initially at pH 3 were heat treated at the same pH, κ-casein did not transform into fibrils. However, when the films were subjected to heat treatment at pH 5, κ-casein was transformed into fibrils within multilayer films due to weakened intermolecular interactions between κ-casein and PAA. We also noted that the multilayer film was swollen at pH 5 by the charge imbalance within the film, which we believe gives enough mobility for κ-caseins to form fibrils with adjacent κ-caseins within the multilayer. The fibrils were found to be uniformly distributed across the entire film thickness, and the aspect ratio as well as the number density of fibrils increased as a function of incubation time. The present study reveals a strategy to realize in situ nanocomposites within LbL multilayer films simply by triggering the formation of protein fibrils by controlling the intermolecular interactions between amyloid precursors and polyelectrolytes (PEs).
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Affiliation(s)
- Ji-Hye Lee
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
| | - Hyun Joo Hwang
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
| | - Ghibom Bhak
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
| | - Yeongseon Jang
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
| | - Seung R. Paik
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
| | - Kookheon Char
- The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, and ‡School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
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26
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Tokuda Y, Miyagishima T, Tomida K, Wang B, Takahashi S, Sato K, Anzai JI. Dual pH-sensitive layer-by-layer films containing amphoteric poly(diallylamine-co-maleic acid). J Colloid Interface Sci 2013; 399:26-32. [DOI: 10.1016/j.jcis.2013.02.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 02/22/2013] [Accepted: 02/25/2013] [Indexed: 11/29/2022]
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27
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Hartmann H, Hossfeld S, Schlosshauer B, Mittnacht U, Pêgo AP, Dauner M, Doser M, Stoll D, Krastev R. Hyaluronic acid/chitosan multilayer coatings on neuronal implants for localized delivery of siRNA nanoplexes. J Control Release 2013; 168:289-97. [PMID: 23562632 DOI: 10.1016/j.jconrel.2013.03.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 03/14/2013] [Accepted: 03/18/2013] [Indexed: 12/16/2022]
Abstract
Binding, stabilizing and promoting cellular uptake of siRNA are all critical efforts in creating matrices for the localized delivery of siRNA molecules to target cells. In this study, we describe the generation of chitosan imidazole/siRNA nanoplexes (NPs) embedded in nano scope polyelectrolyte multilayers (PEMs) composed of hyaluronic acid and chitosan for sustained and localized drug delivery. Regular PEM build-up, successful integration of NPs and controlled release under physiological conditions were shown. Biological efficacy was evaluated in neuronal cell culture concerning cell adhesion, viability, NPs uptake and gene silencing. The additionally shown biological functionalization of neuronal implants possesses potential for future applications in the field of regenerative medicine and treatment of spinal cord injuries.
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Affiliation(s)
- Hanna Hartmann
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
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28
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Zhiryakova MV, Shifrina ZB, Izumrudov VA. Competitive reactions in dendriplex and polyplex solutions. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2012.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Peeters M, Troost FJ, Mingels RH, Welsch T, van Grinsven B, Vranken T, Ingebrandt S, Thoelen R, Cleij TJ, Wagner P. Impedimetric Detection of Histamine in Bowel Fluids Using Synthetic Receptors with pH-Optimized Binding Characteristics. Anal Chem 2013; 85:1475-83. [DOI: 10.1021/ac3026288] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marloes Peeters
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
| | - Freddy J. Troost
- Department of Internal
Medicine,
div. of Gastroenterology−Hepatology, Maastricht University Medical Center, Minderbroedersberg 4-6, 6211
LK Maastricht, The Netherlands
| | - Roel H.G. Mingels
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
| | - Tina Welsch
- Fachhochschule Kaiserslautern, University of Applied Sciences, Amerikastraße
1, 66482 Zweibrücken, Germany
| | - Bart van Grinsven
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
| | - Tom Vranken
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
| | - Sven Ingebrandt
- Fachhochschule Kaiserslautern, University of Applied Sciences, Amerikastraße
1, 66482 Zweibrücken, Germany
| | - Ronald Thoelen
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
- XIOS University College Limburg, Agoralaan - Building H, 3590 Diepenbeek,
Belgium
| | - Thomas Jan Cleij
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
| | - Patrick Wagner
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek,
Belgium
- IMEC vzw, division
IMOMEC, Wetenschapspark
1, 3590 Diepenbeek, Belgium
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30
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Gilde F, Maniti O, Guillot R, Mano JF, Logeart-Avramoglou D, Sailhan F, Picart C. Secondary structure of rhBMP-2 in a protective biopolymeric carrier material. Biomacromolecules 2012; 13:3620-6. [PMID: 22967015 DOI: 10.1021/bm3010808] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Efficient delivery of growth factors is one of the great challenges of tissue engineering. Polyelectrolyte multilayer films (PEM) made of biopolymers have recently emerged as an interesting carrier for delivering recombinant human bone morphogenetic protein 2 (rhBMP-2 noted here BMP-2) to cells in a matrix-bound manner. We recently showed that PEM made of poly(l-lysine) and hyaluronan (PLL/HA) can retain high and tunable quantities of BMP-2 and can deliver it to cells to induce their differentiation in osteoblasts. Here, we investigate quantitatively by Fourier transform infrared spectroscopy (FTIR) the secondary structure of BMP-2 in solution as well as trapped in a biopolymeric thin film. We reveal that the major structural elements of BMP-2 in solution are intramolecular β-sheets and unordered structures as well as α-helices. Furthermore, we studied the secondary structure of rhBMP-2 trapped in hydrated films and in dry films since drying is an important step for future applications of these bioactive films onto orthopedic biomaterials. We demonstrate that the structural elements were preserved when BMP-2 was trapped in the biopolymeric film in hydrated conditions and, to a lesser extent, in dry state. Importantly, its bioactivity was maintained after drying of the film. Our results appear highly promising for future applications of these films as coatings of biomedical materials, to deliver bioactive proteins while preserving their bioactivity upon storage in dry state.
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Affiliation(s)
- Flora Gilde
- CNRS UMR 5628 (LMGP), Grenoble Institute of Technology and CNRS, 3 parvis Louis Néel, F-38016 Grenoble Cedex, France
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31
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Pavlukhina SV, Kaplan JB, Xu L, Chang W, Yu X, Madhyastha S, Yakandawala N, Mentbayeva A, Khan B, Sukhishvili SA. Noneluting enzymatic antibiofilm coatings. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4708-16. [PMID: 22909396 PMCID: PMC3459334 DOI: 10.1021/am3010847] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We developed a highly efficient, biocompatible surface coating that disperses bacterial biofilms through enzymatic cleavage of the extracellular biofilm matrix. The coating was fabricated by binding the naturally existing enzyme dispersin B (DspB) to surface-attached polymer matrices constructed via a layer-by-layer (LbL) deposition technique. LbL matrices were assembled through electrostatic interactions of poly(allylamine hydrochloride) (PAH) and poly(methacrylic acid) (PMAA), followed by chemical cross-linking with glutaraldehyde and pH-triggered removal of PMAA, producing a stable PAH hydrogel matrix used for DspB loading. The amount of DspB loaded increased linearly with the number of PAH layers in surface hydrogels. DspB was retained within these coatings in the pH range from 4 to 7.5. DspB-loaded coatings inhibited biofilm formation by two clinical strains of Staphylococcus epidermidis. Biofilm inhibition was ≥98% compared to mock-loaded coatings as determined by CFU enumeration. In addition, DspB-loaded coatings did not inhibit attachment or growth of cultured human osteoblast cells. We suggest that the use of DspB-loaded multilayer coatings presents a promising method for creating biocompatible surfaces with high antibiofilm efficiency, especially when combined with conventional antimicrobial treatment of dispersed bacteria.
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Affiliation(s)
- Svetlana V. Pavlukhina
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Jeffrey B. Kaplan
- Department of Oral Biology, New Jersey Dental School, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA
| | - Li Xu
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Wei Chang
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Xiaojun Yu
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Srinivasa Madhyastha
- Kane Biotech Inc., 162–196 Innovation Drive, Winnipeg, MB, Canada R3T 2N2, Canada
| | | | - Almagul Mentbayeva
- Department of Chemistry, 71, Al-Farabi Ave, Kazakh National University, Almaty, 050038, Kazakhstan
| | - Babar Khan
- Department of Oral Biology, New Jersey Dental School, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA
| | - Svetlana A. Sukhishvili
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
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32
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Chen F, Liu G, Zhang G. Formation of Multilayers by Star Polyelectrolytes: Effect of Number of Arms on Chain Interpenetration. J Phys Chem B 2012; 116:10941-50. [DOI: 10.1021/jp304994k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fenggui Chen
- Department of Chemical Physics,
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei,
P. R. China 230026
| | - Guangming Liu
- Department of Chemical Physics,
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei,
P. R. China 230026
| | - Guangzhao Zhang
- Faculty
of Materials Science
and Engineering, South China University of Technology, Guangzhou, P. R. China 510640
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33
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Liang X, Kozlovskaya V, Chen Y, Zavgorodnya O, Kharlampieva E. Thermosensitive multilayer hydrogels of poly(N-vinylcaprolactam) as nanothin films and shaped capsules. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2012; 24:3707-3719. [PMID: 23087543 PMCID: PMC3472452 DOI: 10.1021/cm301657q] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We report on nanothin multilayer hydrogels of cross-linked poly(N-vinylcaprolactam) (PVCL) that exhibit distinctive and reversible thermoresponsive behavior. The single-component PVCL hydrogels were produced by selective cross-linking of PVCL in layer-by-layer films of PVCL-NH(2) copolymers assembled with poly(methacrylic acid) (PMAA) via hydrogen bonding. The degree of the PVCL hydrogel film shrinkage, defined as the ratio of wet thicknesses at 25°C to 50°C, was demonstrated to be 1.9±0.1 and 1.3±0.1 for the films made from PVCL-NH(2)-7 and PVCL-NH(2)-14 copolymers, respectively. No temperature-responsive behavior was observed for non-cross-linked two-component films due to the presence of PMAA. We also demonstrated that temperature-sensitive PVCL capsules of cubical and spherical shapes could be fabricated as hollow hydrogel replicas of inorganic templates. The cubical (PVCL)(7) capsules retained their cubical shape when temperature was elevated from 25°C to 50°C exhibiting 21±1% decrease in the capsule size. Spherical hydrogel capsules demonstrated similar shrinkage of 23±1%. The temperature-triggered capsule size changes were completely reversible. Our work opens new prospects for developing biocompatible and nanothin hydrogel-based coatings and containers for temperate-regulating drug delivery, cellular uptake, sensing, and transport behavior in microfluidic devices.
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Affiliation(s)
- Xing Liang
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Veronika Kozlovskaya
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Yi Chen
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Oleksandra Zavgorodnya
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Eugenia Kharlampieva
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
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Chaubaroux C, Vrana E, Debry C, Schaaf P, Senger B, Voegel JC, Haikel Y, Ringwald C, Hemmerlé J, Lavalle P, Boulmedais F. Collagen-based fibrillar multilayer films cross-linked by a natural agent. Biomacromolecules 2012; 13:2128-35. [PMID: 22662909 DOI: 10.1021/bm300529a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Surface functionalization plays an important role in the design of biomedical implants, especially when layer forming cells, such as endothelial or epithelial cells, are needed. In this study, we define a novel nanoscale surface coating composed of collagen/alginate polyelectrolyte multilayers and cross-linked for stability with genipin. This buildup follows an exponential growth regime versus the number of deposition cycles with a distinct nanofibrillar structure that is not damaged by the cross-linking step. Stability and cell compatibility of the cross-linked coatings were studied with human umbilical vein endothelial cells. The surface coating can be covered by a monolayer of vascular endothelial cells within 5 days. Genipin cross-linking renders the surface more suitable for cell attachment and proliferation compared to glutaraldehyde (more conventional cross-linker) cross-linked surfaces, where cell clumps in dispersed areas were observed. In summary, it is possible with the defined system to build fibrillar structures with a nanoscale control of film thickness, which would be useful for in vivo applications such as inner lining of lumens for vascular and tracheal implants.
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Affiliation(s)
- Christophe Chaubaroux
- Institut National de la Santé et de la Recherche Médicale , INSERM UMR 977, Biomaterials and Tissue Engineering, Strasbourg, France
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35
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Koo J, Czeslik C. Probing aggregation and fibril formation of insulin in polyelectrolyte multilayers. Colloids Surf B Biointerfaces 2012; 94:80-8. [PMID: 22369752 DOI: 10.1016/j.colsurfb.2012.01.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Revised: 01/13/2012] [Accepted: 01/18/2012] [Indexed: 11/29/2022]
Abstract
Ultrathin films are useful for coating materials and controlling drug delivery processes. Here, we explore the use of polyelectrolyte multilayers as templates for the formation of two-dimensional protein networks, which represent biocompatible and biodegradable ultrathin films. In a first step, we have studied the lateral aggregation and amyloid fibril formation of bovine insulin that is adsorbed at and confined within planar polyelectrolyte multilayers, assembled with poly(diallyldimethylammonium chloride) (PDDA), poly(styrenesulfonic acid) (PSS), and hyaluronic acid (HA). Si-PDDA-PSS-(insulin-PSS)(x) and Si-PDDA-PSS-(insulin-HA)(x) multilayers (x=1-4) have been prepared and characterized in the fully hydrated state by using X-ray reflectometry, attenuated total reflection-Fourier transform infrared spectroscopy and confocal fluorescence microscopy. The obtained data demonstrate a successful build-up of the insulin-polyelectrolyte multilayers on silicon wafers that grow strongly in thickness upon insulin adsorption on PSS and HA layers. The secondary structure analysis of insulin, based on the vibrational amide I'-band, indicates an enhanced intermolecular β-sheet formation within the multilayers at 70°C and pD=2, i.e. at conditions that promote insulin amyloid fibrils rich in β-sheet contents. However, insulin that is confined between two polyelectrolyte layers rather forms amorphous aggregates as can be inferred from confocal fluorescence images. Remarkably, when insulin is deposited as the top-layer, a partial conversion into a two-dimensional fibrillar network can be induced by adding amyloid seeds to the solution. Thus, the results of this study illustrate the capability of polyelectrolyte multilayers as templates for the growth of protein networks.
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Affiliation(s)
- Juny Koo
- Technische Universität Dortmund, Fakultät Chemie, D-44221 Dortmund, Germany
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36
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Drachuk I, Shchepelina O, Lisunova M, Harbaugh S, Kelley-Loughnane N, Stone M, Tsukruk VV. pH-responsive layer-by-layer nanoshells for direct regulation of cell activity. ACS NANO 2012; 6:4266-4278. [PMID: 22489604 DOI: 10.1021/nn3008355] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Saccharomyces cerevisiae yeast cells encapsulated with pH-responsive synthetic nanoshells from lightly cross-linked polymethacrylic acid showed a high viability rate of around 90%, an indication of high biocompatibility of synthetic pH-responsive shells. We demonstrated that increasing pH above the isoelectric point of the polymer shell leads to a delay in growth rate; however, it does not affect the expression of enhanced green fluorescent protein. We suggest that progressive ionization and charge accumulation within the synthetic shells evoke a structural change in the outer shells which affect the membrane transport. This change facilitates the ability to manipulate growth kinetics and functionality of the cells with the surrounding environment. We observed that hollow layer-by layer nanoshells showed a remarkable degree of reversible swelling/deswelling over a narrow pH range (pH 5.0-6.0), but their assembly directly on the cell surface resulted in the suppression of large dimensional changes. We suggest that the variation in surface charges caused by deprotonation/protonation of carboxylic groups in the nanoshells controlled cell growth and cell function, which can be utilized for external chemical control of cell-based biosensors.
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Affiliation(s)
- Irina Drachuk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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37
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Xu L, Pristinski D, Zhuk A, Stoddart C, Ankner JF, Sukhishvili SA. Linear versus Exponential Growth of Weak Polyelectrolyte Multilayers: Correlation with Polyelectrolyte Complexes. Macromolecules 2012. [DOI: 10.1021/ma300157p] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Li Xu
- Department of Chemistry, Chemical
Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Denis Pristinski
- BioSensors Division, NantWorks LLC, Costa Mesa, California 92626, United
States
| | - Aliaksandr Zhuk
- Department of Chemistry, Chemical
Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Chris Stoddart
- Department of Chemistry, Chemical
Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - John F. Ankner
- Spallation Neutron
Source, Oak Ridge National Laboratory,
Oak Ridge, Tennessee
37831, United States
| | - Svetlana A. Sukhishvili
- Department of Chemistry, Chemical
Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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38
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Lehaf AM, Hariri HH, Schlenoff JB. Homogeneity, modulus, and viscoelasticity of polyelectrolyte multilayers by nanoindentation: refining the buildup mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6348-55. [PMID: 22480307 PMCID: PMC3328862 DOI: 10.1021/la300482x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Atomic force microscopy, AFM, and nanoindentation of polyelectrolyte multilayers, PEMUs, made from poly(diallyldimethylammonium), PDADMA, and poly(styrene sulfonate), PSS, provided new insight into their surface morphology and growth mechanism. A strong odd/even alternation of surface modulus revealed greater extrinsic (counterion-balanced) charge compensation for fully hydrated multilayers ending in the polycation, PDADMA. These swings in modulus indicate a much more asymmetric layer-by-layer growth mechanism than previously proposed. Viscoelastic properties of the PEMU, which may contribute to cell response, were highlighted by variable indentation rates and minimized by extrapolating to zero indentation rate, at which point the surface and bulk equilibrium moduli were comparable. Variations in surface composition were probed at high resolution using force mapping, and the surface was found to be uniform, with no evidence of phase separation. AFM comparison of wet and dry films terminated with PSS and PDADMA revealed much greater swelling of the PDADMA-terminated PEMU by water, with collapse of surface roughness features in dry conditions. Dynamic and static contact angle measurements suggested less rearrangement for the glassy PSS surface.
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Affiliation(s)
- Ali M Lehaf
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, USA
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39
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Kozlovskaya V, Baggett J, Godin B, Liu X, Kharlampieva E. Hydrogen-bonded Multilayers of Silk Fibroin: From Coatings to Cell-mimicking Shaped Microcontainers. ACS Macro Lett 2012; 2012:384-387. [PMID: 22432092 DOI: 10.1021/mz200118f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We present a novel type of all-aqueous non-ionic layer-by-layer films of silk fibroin with synthetic macromolecules and a natural polyphenol. We found the multilayer growth and stability to be strongly pH-dependent. Silk assembled with poly(methacrylic) and tannic acids at pH=3.5 disintegrated at pH~5; while silk/poly(N-vinylcaprolactam) interactions were stable at low and high pH values but resulting in thinner films at high pH. The results suggest that the intermolecular interactions are primary driven by hydrogen bonding with a considerable contribution of hydrophobic forces. We also demonstrated that cubical, spherical and platelet capsules with silk-containing walls can be constructed using particulate sacrificial templates. This work sets a foundation for future explorations of natural and synthetic macromolecules assemblies as biomimetic materials with tunable properties.
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Affiliation(s)
- Veronika Kozlovskaya
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama,
35294, United States
| | - Jennifer Baggett
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama,
35294, United States
| | - Biana Godin
- Department
of Nanomedicine, The Methodist Hospital Research Institute, Houston,
Texas, 77030, United States
| | - Xuewu Liu
- Department
of Nanomedicine, The Methodist Hospital Research Institute, Houston,
Texas, 77030, United States
| | - Eugenia Kharlampieva
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama,
35294, United States
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40
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Shukla A, Fang JC, Puranam S, Jensen FR, Hammond PT. Hemostatic multilayer coatings. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:492-496. [PMID: 22223363 DOI: 10.1002/adma.201103794] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 11/12/2011] [Indexed: 05/31/2023]
Abstract
Spray layer-by-layer assembly is used to create hemostatic films containing thrombin and tannic acid. The spray assembly technique enables coating of porous and absorbent commercial gelatin sponges with these films. Coated sponges are able to promote instantaneous hemostasis in a porcine spleen bleeding model.
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Affiliation(s)
- Anita Shukla
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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41
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Han L, Mao Z, Wuliyasu H, Wu J, Gong X, Yang Y, Gao C. Modulating the structure and properties of poly(sodium 4-styrenesulfonate)/poly(diallyldimethylammonium chloride) multilayers with concentrated salt solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:193-9. [PMID: 22118499 DOI: 10.1021/la2040533] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Poly(sodium 4-styrenesulfonate) (PSS)/poly(diallyldimethylammonium chloride) (PDADMAC) multilayers were treated with 1-5 M NaCl solutions, resulting in continuous changes in the physicochemical properties of the multilayers. Significant mass loss was observed when the salt concentration was higher than 2 M and reached as high as 72% in a 5 M NaCl solution. The disassembly occurred initially in the superficial layers and then developed in the bulk multilayers. For the multilayers with PDADMAC as the outmost layer, the molar ratio of PSS/PDADMAC was increased and the surface chemistry was changed from PDADMAC domination below 2 M NaCl to PSS domination above 3 M NaCl. Owing to the higher concentrations of uncompensated for polyelectrolytes at both lower and higher salt concentrations, the swelling ratio of the multilayers was decreased until reaching 3 M NaCl and then was increased significantly again. The salt-treated PSS/PDADMAC thin films are expected to show different behaviors in terms of the physical adsorption of various functional substances, cell adhesion and proliferation, and chemical reaction activity.
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Affiliation(s)
- Lulu Han
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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42
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SATO K, TAKAHASHI S, ANZAI JI. Layer-by-layer Thin Films and Microcapsules for Biosensors and Controlled Release. ANAL SCI 2012; 28:929-38. [DOI: 10.2116/analsci.28.929] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Katsuhiko SATO
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | - Jun-ichi ANZAI
- Graduate School of Pharmaceutical Sciences, Tohoku University
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43
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Shukla A, Fang JC, Puranam S, Hammond PT. Release of vancomycin from multilayer coated absorbent gelatin sponges. J Control Release 2012; 157:64-71. [DOI: 10.1016/j.jconrel.2011.09.062] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 09/05/2011] [Accepted: 09/06/2011] [Indexed: 01/23/2023]
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44
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Ye Y, Mao Y, Wang H, Ren Z. Hybrid structure of pH-responsive hydrogel and carbon nanotube array with superwettability. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14547a] [Citation(s) in RCA: 30] [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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45
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Bilalis P, Chatzipavlidis A, Tziveleka LA, Boukos N, Kordas G. Nanodesigned magnetic polymer containers for dual stimuli actuated drug controlled release and magnetic hyperthermia mediation. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31392h] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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46
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Kumar S, Dory YL, Lepage M, Zhao Y. Surface-Grafted Stimuli-Responsive Block Copolymer Brushes for the Thermo-, Photo- and pH-Sensitive Release of Dye Molecules. Macromolecules 2011. [DOI: 10.1021/ma2010102] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Surjith Kumar
- Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
- Département de médecine nucléaire et de radiobiologie and Centre d’imagerie moléculaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Yves L. Dory
- Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Martin Lepage
- Département de médecine nucléaire et de radiobiologie and Centre d’imagerie moléculaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Yue Zhao
- Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
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47
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Izumrudov VA, Zhiryakova MV. Competitive reactions in solutions of the complex of chitosan and DNA. POLYMER SCIENCE SERIES A 2011. [DOI: 10.1134/s0965545x1106006x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Layer-by-Layer Assembled Multilayer Films of Methoxypoly(ethylene glycol)-block-poly(α,L-glutamic acid) and Chitosan with Reduced Cell Adhesion. Macromol Biosci 2011; 11:1211-7. [DOI: 10.1002/mabi.201100053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/07/2011] [Indexed: 11/07/2022]
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49
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Cao B, Yan S, Zhang K, Song Z, Cao T, Chen X, Cui L, Yin J. A Poly(acrylic acid)-block-
Poly(L
-glutamic acid) Diblock Copolymer with Improved Cell Adhesion for Surface Modification. Macromol Biosci 2011; 11:970-7. [DOI: 10.1002/mabi.201100010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 02/24/2011] [Indexed: 11/10/2022]
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50
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Wang X, Sun J, Ji J. pH modulated layer-by-layer assembly as a new approach to tunable formulating of DNA within multilayer coating. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2010.09.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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