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Baghersad S, Madruga LYC, Martins AF, Popat KC, Kipper MJ. Expanding the Scope of an Amphoteric Condensed Tannin, Tanfloc, for Antibacterial Coatings. J Funct Biomater 2023; 14:554. [PMID: 37998123 PMCID: PMC10672460 DOI: 10.3390/jfb14110554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/25/2023] Open
Abstract
Bacterial infections are a common mode of failure for medical implants. This study aims to develop antibacterial polyelectrolyte multilayer (PEM) coatings that contain a plant-derived condensed tannin polymer (Tanfloc, TAN) with inherent antimicrobial activity. Tanfloc is amphoteric, and herein we show that it can be used as either a polyanion or a polycation in PEMs, thereby expanding the possibility of its use in PEM coatings. PEMs are ordinarily formed using a polycation and a polyanion, in which the functional (ionic) groups of the two polymers are complexed to each other. However, using the amphoteric polymer Tanfloc with weakly basic amine and weakly acidic catechol and pyrogallol groups enables PEM formation using only one or the other of its functional groups, leaving the other functional group available to impart antibacterial activity. This work demonstrates Tanfloc-containing PEMs using multiple counter-polyelectrolytes including three polyanionic glycosaminoglycans of varying charge density, and the polycations N,N,N-trimethyl chitosan and polyethyleneimine. The layer-by-layer (LbL) assembly of PEMs was monitored using in situ Fourier-transform surface plasmon resonance (FT-SPR), confirming a stable LbL assembly. X-ray photoelectron spectroscopy (XPS) was used to evaluate surface chemistry, and atomic force microscopy (AFM) was used to determine the surface roughness. The LDH release levels from cells cultured on the Tanfloc-containing PEMs were not statistically different from those on the negative control (p > 0.05), confirming their non-cytotoxicity, while exhibiting remarkable antiadhesive and bactericidal properties against Pseudomonas aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus), respectively. The antibacterial effects were attributed to electrostatic interactions and Tanfloc's polyphenolic nature. This work underscores the potential of Tanfloc as a versatile biomaterial for combating infections on surfaces.
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Affiliation(s)
- Somayeh Baghersad
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80526, USA;
| | - Liszt Y. C. Madruga
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80526, USA; (L.Y.C.M.); (A.F.M.)
| | - Alessandro F. Martins
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80526, USA; (L.Y.C.M.); (A.F.M.)
- Department of Chemistry & Biotechnology, University of Wisconsin-River Falls, River Falls, WI 54022, USA
| | - Ketul C. Popat
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80526, USA;
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80526, USA
- School of Materials Science and Engineering, Colorado State University, Fort Collins, CO 80526, USA
| | - Matt J. Kipper
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80526, USA;
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80526, USA; (L.Y.C.M.); (A.F.M.)
- School of Materials Science and Engineering, Colorado State University, Fort Collins, CO 80526, USA
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2
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Wasilewska M, Michna A, Pomorska A, Wolski K, Zapotoczny S, Farkas E, Szittner Z, Szekacs I, Horvath R. Polysaccharide-based nano-engineered multilayers for controlled cellular adhesion in label-free biosensors. Int J Biol Macromol 2023; 247:125701. [PMID: 37429346 DOI: 10.1016/j.ijbiomac.2023.125701] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/22/2023] [Accepted: 07/03/2023] [Indexed: 07/12/2023]
Abstract
Controlling cellular adhesion is a critical step in the development of biomaterials, and in cell- based biosensing assays. Usually, the adhesivity of cells is tuned by an appropriate biocompatible layer. Here, synthetic poly(diallyldimethylammonium chloride) (PDADMAC), natural chitosan, and heparin (existing in an extracellular matrix) were selected to assembly PDADMAC/heparin and chitosan/heparin films. The physicochemical properties of macroion multilayers were determined by streaming potential measurements (SPM), quartz crystal microbalance (QCM-D), and optical waveguide lightmode spectroscopy (OWLS). The topography of the wet films was imaged using atomic force microscopy (AFM). The adhesion of preosteoblastic cell line MC3T3-E1 on those well-characterized polysaccharide-based multilayers was evaluated using a resonant waveguide grating (RWG) based optical biosensor and digital holographic microscopy. The latter method was engaged to investigate long-term cellular behavior on the fabricated multilayers. (PDADMAC/heparin) films were proved to be the most effective in inducing cellular adhesion. The cell attachment to chitosan/heparin-based multilayers was negligible. It was found that efficient adhesion of the cells occurs onto homogeneous and rigid multilayers (PDADMAC/heparin), whereas the macroion films forming "sponge-like" structures (chitosan/heparin) are less effective, and could be employed when reduced adhesion is needed. Polysaccharide-based multilayers can be considered versatile systems for medical applications. One can postulate that the presented results are relevant not only for modeling studies but also for applied research.
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Affiliation(s)
- Monika Wasilewska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland.
| | - Aneta Michna
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland.
| | - Agata Pomorska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland.
| | - Karol Wolski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Enikő Farkas
- Nanobiosensorics Laboratory, Institute of Technical Physics and Materials Science, Centre for Energy Research, 1121 Budapest, Hungary.
| | - Zoltan Szittner
- Nanobiosensorics Laboratory, Institute of Technical Physics and Materials Science, Centre for Energy Research, 1121 Budapest, Hungary.
| | - Inna Szekacs
- Nanobiosensorics Laboratory, Institute of Technical Physics and Materials Science, Centre for Energy Research, 1121 Budapest, Hungary.
| | - Robert Horvath
- Nanobiosensorics Laboratory, Institute of Technical Physics and Materials Science, Centre for Energy Research, 1121 Budapest, Hungary.
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3
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Šušteršič T, Gribova V, Nikolic M, Lavalle P, Filipovic N, Vrana NE. The Effect of Machine Learning Algorithms on the Prediction of Layer-by-Layer Coating Properties. ACS OMEGA 2023; 8:4677-4686. [PMID: 36777619 PMCID: PMC9909801 DOI: 10.1021/acsomega.2c06471] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/30/2022] [Indexed: 06/18/2023]
Abstract
Layer-by-layer film (LbL) coatings made of polyelectrolytes are a powerful tool for surface modification, including the applications in the biomedical field, for food packaging, and in many electrochemical systems. However, despite the number of publications related to LbL assembly, predicting LbL coating properties represents quite a challenge, can take a long time, and be very costly. Machine learning (ML) methodologies that are now emerging can accelerate and improve new coating development and potentially revolutionize the field. Recently, we have demonstrated a preliminary ML-based model for coating thickness prediction. In this paper, we compared several ML algorithms for optimizing a methodology for coating thickness prediction, namely, linear regression, Support Vector Regressor, Random Forest Regressor, and Extra Tree Regressor. The current research has shown that learning algorithms are effective in predicting the coating output value, with the Extra Tree Regressor algorithm demonstrating superior predictive performance, when used in combination with optimized hyperparameters and with missing data imputation. The best predictors of the coating thickness were determined, and they can be later used to accurately predict coating thickness, avoiding measurement of multiple parameters. The development of optimized methodologies will ensure different reliable predictive models for coating property/function relations. As a continuation, the methodology can be adapted and used for predicting the outputs connected to antimicrobial, anti-inflammatory, and antiviral properties in order to be able to respond to actual biomedical problems such as antibiotic resistance, implant rejection, or COVID-19 outbreak.
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Affiliation(s)
- Tijana Šušteršič
- Faculty
of Engineering, University of Kragujevac (FINK), Kragujevac34000, Serbia
- Steinbeis
Advanced Risk Technologies Institute doo Kragujevac (SARTIK), Kragujevac34000, Serbia
- Bioengineering
Research and Development Center (BioIRC), Kragujevac34000, Serbia
| | - Varvara Gribova
- Biomaterials
and Bioengineering laboratory, INSERM UMR
1121, Strasbourg67100, France
- Université
de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg67000, France
| | - Milica Nikolic
- Steinbeis
Advanced Risk Technologies Institute doo Kragujevac (SARTIK), Kragujevac34000, Serbia
- Institute
of Information Technologies, University of Kragujevac, Kragujevac34000, Serbia
- Eindhoven
University of Technology, Eindhoven5611 CB, The Netherlands
| | - Philippe Lavalle
- Biomaterials
and Bioengineering laboratory, INSERM UMR
1121, Strasbourg67100, France
- Université
de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg67000, France
- SPARTHA
Medical, Strasbourg67100, France
| | - Nenad Filipovic
- Faculty
of Engineering, University of Kragujevac (FINK), Kragujevac34000, Serbia
- Steinbeis
Advanced Risk Technologies Institute doo Kragujevac (SARTIK), Kragujevac34000, Serbia
- Bioengineering
Research and Development Center (BioIRC), Kragujevac34000, Serbia
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Tailored Polyelectrolyte Multilayer Systems by Variation of Polyelectrolyte Composition and EDC/NHS Cross-Linking: Controlled Drug Release vs. Drug Reservoir Capabilities and Cellular Response for Improved Osseointegration. Polymers (Basel) 2022; 14:polym14204315. [PMID: 36297892 PMCID: PMC9609345 DOI: 10.3390/polym14204315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/05/2022] Open
Abstract
Polyelectrolyte multilayers (PEM) are versatile tools used to investigate fundamental interactions between material-related parameters and the resulting performance in stem cell differentiation, respectively, in bone tissue engineering. In the present study, we investigate the suitability of PEMs with a varying collagen content for use as drug carriers for the human bone morphogenetic protein 2 (rhBMP-2). We use three different PEM systems consisting either of the positively charged poly-L-lysine or the glycoprotein collagen type I and the negatively charged glycosaminoglycan heparin. For a specific modification of the loading capacity and the release kinetics, the PEMs were stepwise cross-linked before loading with cytokine. We demonstrate the possibility of immobilizing significant amounts of rhBMP-2 in all multilayer systems and to specifically tune its release via cross-linking. Furthermore, we prove that the drug release of rhBMP-2 plays only a minor role in the differentiation of osteoprogenitor cells. We find a significantly higher influence of the immobilized rhBMP-2 within the collagen-rich coatings that obviously represent an excellent mimicry of the native extracellular matrix. The cytokine immobilized in its bioactive form was able to achieve an increase in orders of magnitude both in the early stages of differentiation and in late calcification compared to the unloaded layers.
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Schirmer U, Ludolph J, Rothe H, Hauptmann N, Behrens C, Bittrich E, Schliephake H, Liefeith K. Tailored Polyelectrolyte Multilayer Systems by Variation of Polyelectrolyte Composition and EDC/NHS Cross-Linking: Physicochemical Characterization and In Vitro Evaluation. NANOMATERIALS 2022; 12:nano12122054. [PMID: 35745395 PMCID: PMC9228333 DOI: 10.3390/nano12122054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/09/2022] [Accepted: 06/12/2022] [Indexed: 12/17/2022]
Abstract
The layer-by-layer (LbL) self-assembly technique is an effective method to immobilize components of the extracellular matrix (ECM) such as collagen and heparin onto, e.g., implant surfaces/medical devices with the aim of forming polyelectrolyte multilayers (PEMs). Increasing evidence even suggests that cross-linking influences the physicochemical character of PEM films since mechanical cues inherent to the substrate may be as important as its chemical nature to influence the cellular behavior. In this study, for the first-time different collagen/heparin films have been prepared and cross-linked with EDC/NHS chemistry. Quartz crystal microbalance, zeta potential analyzer, diffuse reflectance Fourier transform infrared spectroscopy, atomic force microscopy and ellipsometry were used to characterize film growth, stiffness, and topography of different film systems. The analysis of all data proves a nearly linear film growth for all PEM systems, the efficacy of cross-linking and the corresponding changes in the film rigidity after cross-linking and an appropriate surface topography. Furthermore, preliminary cell culture experiments illustrated those cellular processes correlate roughly with the quantity of newly created covalent amide bonds. This allows a precise adjustment of the physicochemical properties of the selected film architecture regarding the desired application and target cells. It could be shown that collagen improves the biocompatibility of heparin containing PEMs and due to their ECM-analogue nature both molecules are ideal candidates intended to be used for any biomedical application with a certain preference to improve the performance of bone implants or bone augmentation strategies.
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Affiliation(s)
- Uwe Schirmer
- Institute for Bioprocessing and Analytical Measurement Techniques, 37308 Heiligenstadt, Germany; (U.S.); (J.L.); (H.R.); (N.H.)
| | - Johanna Ludolph
- Institute for Bioprocessing and Analytical Measurement Techniques, 37308 Heiligenstadt, Germany; (U.S.); (J.L.); (H.R.); (N.H.)
| | - Holger Rothe
- Institute for Bioprocessing and Analytical Measurement Techniques, 37308 Heiligenstadt, Germany; (U.S.); (J.L.); (H.R.); (N.H.)
| | - Nicole Hauptmann
- Institute for Bioprocessing and Analytical Measurement Techniques, 37308 Heiligenstadt, Germany; (U.S.); (J.L.); (H.R.); (N.H.)
| | - Christina Behrens
- Department of Oral and Maxillofacial Surgery, George-Augusta-University, 37075 Goettingen, Germany; (C.B.); (H.S.)
| | - Eva Bittrich
- Center Macromolecular Structure Analysis, Leibniz Institute of Polymer Research, 01005 Dresden, Germany;
| | - Henning Schliephake
- Department of Oral and Maxillofacial Surgery, George-Augusta-University, 37075 Goettingen, Germany; (C.B.); (H.S.)
| | - Klaus Liefeith
- Institute for Bioprocessing and Analytical Measurement Techniques, 37308 Heiligenstadt, Germany; (U.S.); (J.L.); (H.R.); (N.H.)
- Correspondence: ; Tel.:+49-3606-671500
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6
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Sánchez-Bodón J, Andrade del Olmo J, Alonso JM, Moreno-Benítez I, Vilas-Vilela JL, Pérez-Álvarez L. Bioactive Coatings on Titanium: A Review on Hydroxylation, Self-Assembled Monolayers (SAMs) and Surface Modification Strategies. Polymers (Basel) 2021; 14:165. [PMID: 35012187 PMCID: PMC8747097 DOI: 10.3390/polym14010165] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 12/15/2022] Open
Abstract
Titanium (Ti) and its alloys have been demonstrated over the last decades to play an important role as inert materials in the field of orthopedic and dental implants. Nevertheless, with the widespread use of Ti, implant-associated rejection issues have arisen. To overcome these problems, antibacterial properties, fast and adequate osseointegration and long-term stability are essential features. Indeed, surface modification is currently presented as a versatile strategy for developing Ti coatings with all these challenging requirements and achieve a successful performance of the implant. Numerous approaches have been investigated to obtain stable and well-organized Ti coatings that promote the tailoring of surface chemical functionalization regardless of the geometry and shape of the implant. However, among all the approaches available in the literature to functionalize the Ti surface, a promising strategy is the combination of surface pre-activation treatments typically followed by the development of intermediate anchoring layers (self-assembled monolayers, SAMs) that serve as the supporting linkage of a final active layer. Therefore, this paper aims to review the latest approaches in the biomedical area to obtain bioactive coatings onto Ti surfaces with a special focus on (i) the most employed methods for Ti surface hydroxylation, (ii) SAMs-mediated active coatings development, and (iii) the latest advances in active agent immobilization and polymeric coatings for controlled release on Ti surfaces.
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Affiliation(s)
- Julia Sánchez-Bodón
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (J.S.-B.); (J.A.d.O.); (I.M.-B.); (J.L.V.-V.)
| | - Jon Andrade del Olmo
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (J.S.-B.); (J.A.d.O.); (I.M.-B.); (J.L.V.-V.)
- i+Med S. Coop, Parque Tecnológico de Alava, Albert Einstein 15, Nave 15, 01510 Vitoria-Gasteiz, Spain;
| | - Jose María Alonso
- i+Med S. Coop, Parque Tecnológico de Alava, Albert Einstein 15, Nave 15, 01510 Vitoria-Gasteiz, Spain;
| | - Isabel Moreno-Benítez
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (J.S.-B.); (J.A.d.O.); (I.M.-B.); (J.L.V.-V.)
| | - José Luis Vilas-Vilela
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (J.S.-B.); (J.A.d.O.); (I.M.-B.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Leyre Pérez-Álvarez
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (J.S.-B.); (J.A.d.O.); (I.M.-B.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
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7
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Abdul-Jabbar S, Martin GP, Martini LG, Lawrence J, Royall PG. Polyelectrolyte Multi-Layered Griseofulvin Nanoparticles: Conventional versus Continuous In-Situ Layer-by-Layer Fabrication. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:5611-5621. [PMID: 33980370 DOI: 10.1166/jnn.2021.19453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polyelectrolyte multilayers are promising drug carriers with potential applications in the delivery of poorly soluble drugs. Furthermore, the polyelectrolyte multilayer contributes towards electrostatic interactions, which enhances the physical and chemical stability of colloids when compared to those prepared by other approaches. The aim of this work was to generate a polyelectrolyte multilayer on well characterised nanoparticles of the poorly water-soluble drug, griseofulvin. Griseofulvin (GF) nanoparticles (300 nm) were produced by wet bead milling, bearing a negative surface charge due to the use of poly(sodium 4-styrenesulfonate) (PSS) as a stabiliser. Six further layers of alternating chitosan and PSS polyelectrolyte multilayer were successfully generated at the particle surface either via use of: (1) the conventional method of adding excess coating polymer followed by centrifugation, or (2) the continuous in situ approach of adding sufficient amount of coating polymer. The continuous in situ method was designed de novo by the consecutive addition of polymers under high shear rate mixing. In comparison to the continuous in situ method, the conventional method yielded nanoparticles of smaller size (282 ±9 nm vs. 497 ±34 nm) and higher stability by maintaining its size for 6 months. In conclusion, the parent griseofulvin nanosuspension proved to be a suitable candidate for the polyelectrolyte multilayer fabrication providing an avenue for a bespoke formulation with versatile and potentially enhanced drug delivery properties.
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Affiliation(s)
| | - Gary P Martin
- School of Cancer and Pharmaceutical Science, Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford street, London SE1 9NH, United Kingdom
| | - Luigi G Martini
- School of Cancer and Pharmaceutical Science, Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford street, London SE1 9NH, United Kingdom
| | - Jayne Lawrence
- School of Cancer and Pharmaceutical Science, Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford street, London SE1 9NH, United Kingdom
| | - Paul G Royall
- School of Cancer and Pharmaceutical Science, Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford street, London SE1 9NH, United Kingdom
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8
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Gribova V, Navalikhina A, Lysenko O, Calligaro C, Lebaudy E, Deiber L, Senger B, Lavalle P, Vrana NE. Prediction of coating thickness for polyelectrolyte multilayers via machine learning. Sci Rep 2021; 11:18702. [PMID: 34548560 PMCID: PMC8455527 DOI: 10.1038/s41598-021-98170-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 09/06/2021] [Indexed: 11/09/2022] Open
Abstract
Layer-by-layer (LbL) deposition method of polyelectrolytes is a versatile way of developing functional nanoscale coatings. Even though the mechanisms of LbL film development are well-established, currently there are no predictive models that can link film components with their final properties. The current health crisis has shown the importance of accelerated development of biomedical solutions such as antiviral coatings, and the implementation of machine learning methodologies for coating development can enable achieving this. In this work, using literature data and newly generated experimental results, we first analyzed the relative impact of 23 coating parameters on the coating thickness. Next, a predictive model has been developed using aforementioned parameters and molecular descriptors of polymers from the DeepChem library. Model performance was limited because of insufficient number of data points in the training set, due to the scarce availability of data in the literature. Despite this limitation, we demonstrate, for the first time, utilization of machine learning for prediction of LbL coating properties. It can decrease the time necessary to obtain functional coating with desired properties, as well as decrease experimental costs and enable the fast first response to crisis situations (such as pandemics) where coatings can positively contribute. Besides coating thickness, which was selected as an output value in this study, machine learning approach can be potentially used to predict functional properties of multilayer coatings, e.g. biocompatibility, cell adhesive, antibacterial, antiviral or anti-inflammatory properties.
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Affiliation(s)
- Varvara Gribova
- Inserm UMR_S 1121, Biomaterials and Bioengineering, Centre de Recherche en Biomédecine de Strasbourg, 67000, Strasbourg, France.,Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000, Strasbourg, France
| | | | | | | | - Eloïse Lebaudy
- Inserm UMR_S 1121, Biomaterials and Bioengineering, Centre de Recherche en Biomédecine de Strasbourg, 67000, Strasbourg, France.,Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000, Strasbourg, France
| | | | - Bernard Senger
- Inserm UMR_S 1121, Biomaterials and Bioengineering, Centre de Recherche en Biomédecine de Strasbourg, 67000, Strasbourg, France.,Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000, Strasbourg, France
| | - Philippe Lavalle
- Inserm UMR_S 1121, Biomaterials and Bioengineering, Centre de Recherche en Biomédecine de Strasbourg, 67000, Strasbourg, France.,Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000, Strasbourg, France.,SPARTHA Medical, 67100, Strasbourg, France
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9
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Masella M, Crudu A, Léonforté F. Hybrid polarizable simulations of a conventional hydrophobic polyelectrolyte. Toward a theoretical tool for green science innovation. J Chem Phys 2021; 155:114903. [PMID: 34551548 DOI: 10.1063/5.0056508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Hybrid modeling approaches based on all-atom force fields to handle a solute and coarse-grained models to account for the solvent are promising numerical tools that can be used to understand the properties of large and multi-components solutions and thus to speed up the development of new industrial products that obey the standard of green and sustainable chemistry. Here, we discuss the ability of a full polarizable hybrid approach coupled to a standard molecular dynamics scheme to model the behavior in the aqueous phase and at infinite dilution conditions of a standard hydrophobic polyelectrolyte polymer whose charge is neutralized by explicit counterions. Beyond the standard picture of a polyelectrolyte behavior governed by an interplay between opposite intra-polyelectrolyte and inter-polyelectrolyte/counterion Coulombic effects, our simulations show the key role played by both intra-solute polarization effects and long range solute/solvent electrostatics to stabilize compact globular conformations of that polyelectrolyte. Our full polarizable hybrid modeling approach is thus a new theoretical tool well suited to be used in digital strategies for accelerating innovation for green science, for instance.
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Affiliation(s)
- Michel Masella
- Laboratoire de Biologie Structurale et Radiobiologie, Service de Bioénergétique, Biologie Structurale et Mécanismes, Institut Joliot, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Alina Crudu
- L'Oréal Research and Innovation, Aulnay-Sous-Bois, France
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10
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Claus C, Fritz R, Schilling E, Reibetanz U. The Metabolic Response of Various Cell Lines to Microtubule-Driven Uptake of Lipid- and Polymer-Coated Layer-by-Layer Microcarriers. Pharmaceutics 2021; 13:1441. [PMID: 34575517 PMCID: PMC8465159 DOI: 10.3390/pharmaceutics13091441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/27/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
Lipid structures, such as liposomes or micelles, are of high interest as an approach to support the transport and delivery of active agents as a drug delivery system. However, there are many open questions regarding their uptake and impact on cellular metabolism. In this study, lipid structures were assembled as a supported lipid bilayer on top of biopolymer-coated microcarriers based on the Layer-by-Layer assembly strategy. The functionalized microcarriers were then applied to various human and animal cell lines in addition to primary human macrophages (MΦ). Here, their influence on cellular metabolism and their intracellular localization were detected by extracellular flux analysis and immunofluorescence analysis, respectively. The impact of microcarriers on metabolic parameters was in most cell types rather low. However, lipid bilayer-supported microcarriers induced a decrease in oxygen consumption rate (OCR, indicative for mitochondrial respiration) and extracellular acidification rate (ECAR, indicative for glycolysis) in Vero cells. Additionally, in Vero cells lipid bilayer microcarriers showed a more pronounced association with microtubule filaments than polymer-coated microcarrier. Furthermore, they localized to a perinuclear region and induced nuclei with some deformations at a higher rate than unfunctionalized carriers. This association was reduced through the application of the microtubule polymerization inhibitor nocodazole. Thus, the effect of respective lipid structures as a drug delivery system on cells has to be considered in the context of the respective target cell, but in general can be regarded as rather low.
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Affiliation(s)
- Claudia Claus
- Institute of Medical Microbiology and Virology, Faculty of Medicine, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany
| | - Robert Fritz
- Institute for Medical Physics and Biophysics, Faculty of Medicine, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany;
| | - Erik Schilling
- Institute of Clinical Immunology, Faculty of Medicine, University of Leipzig, Johannisallee 30, 04103 Leipzig, Germany;
| | - Uta Reibetanz
- Institute for Medical Physics and Biophysics, Faculty of Medicine, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany;
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11
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Kulikouskaya V, Zhdanko T, Hileuskaya K, Kraskouski A, Zhura A, Skorohod H, Butkevich V, Pal K, Tratsyak S, Agabekov V. Physicochemical aspects of design of ultrathin films based on chitosan, pectin, and their silver nanocomposites with antiadhesive and bactericidal potential. J Biomed Mater Res A 2021; 110:217-228. [PMID: 34291871 DOI: 10.1002/jbm.a.37278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/09/2021] [Accepted: 07/11/2021] [Indexed: 11/11/2022]
Abstract
Implant-related infection is one of the serious problems in regenerative medicine. Promising approach to overcome the problems caused by bacterial growth on the medical implants is their modification by bioactive coatings. A versatile technique for designing multilayer films with tailored characteristics at the nanometer scale is layer-by-layer assembly. In this study, multilayer films based on biopolymers (pectin and chitosan) and their nanocomposites with silver nanoparticles have been prepared and evaluated. The buildup of multilayers was monitored using the quartz crystal microbalance with dissipation technique. The morphology of the obtained films was investigated by atomic force microscopy. We have demonstrated that pectin-Ag-containing films were characterized by the linear growth and smooth defect-free surface. When pectin-Ag was substituted for the pectin in the multilayer systems, the properties of the formed coatings were significantly changed: the film rigidity and surface roughness increased, as well as the film growth acquired the parabolic character. All prepared multilayer films have shown antibacterial activity against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. The significant decrease in the number of the adhered E. coli on the multilayer surface has been determined; moreover, many of the cells were misshapen with cytoplasm leaking. The prepared multilayer films showed a mild activity against S. aureus predominantly due to the antiadhesive effect. Our results indicate that antibacterial activity of biopolymer multilayers is determined by the film composition and physicochemical characteristics and can be associated with their antiadhesive and bactericidal behaviors.
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Affiliation(s)
- Viktoryia Kulikouskaya
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Tsimafei Zhdanko
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Kseniya Hileuskaya
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Aliaksandr Kraskouski
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Alexandr Zhura
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Hennadiy Skorohod
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Vasili Butkevich
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, India
| | - Stanislau Tratsyak
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Vladimir Agabekov
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
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12
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Ciejka J, Grzybala M, Gut A, Szuwarzynski M, Pyrc K, Nowakowska M, Szczubiałka K. Tuning the Surface Properties of Poly(Allylamine Hydrochloride)-Based Multilayer Films. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2361. [PMID: 34062785 PMCID: PMC8125107 DOI: 10.3390/ma14092361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/24/2021] [Accepted: 04/29/2021] [Indexed: 11/17/2022]
Abstract
The layer-by-layer (LbL) method of polyelectrolyte multilayer (PEM) fabrication is extremely versatile. It allows using a pair of any oppositely charged polyelectrolytes. Nevertheless, it may be difficult to ascribe a particular physicochemical property of the resulting PEM to a structural or chemical feature of a single component. A solution to this problem is based on the application of a polycation and a polyanion obtained by proper modification of the same parent polymer. Polyelectrolyte multilayers (PEMs) were prepared using the LbL technique from hydrophilic and amphiphilic derivatives of poly(allylamine hydrochloride) (PAH). PAH derivatives were obtained by the substitution of amine groups in PAH with sulfonate, ammonium, and hydrophobic groups. The PEMs were stable in 1 M NaCl and showed three different modes of thickness growth: exponential, mixed exponential-linear, and linear. Their surfaces ranged from very hydrophilic to hydrophobic. Root mean square (RMS) roughness was very variable and depended on the PEM composition, sample environment (dry, wet), and the polymer constituting the topmost layer. Atomic force microscopy (AFM) imaging of the surfaces showed very different morphologies of PEMs, including very smooth, porous, and structured PEMs with micellar aggregates. Thus, by proper choice of PAH derivatives, surfaces with different physicochemical features (growth type, thickness, charge, wettability, roughness, surface morphology) were obtained.
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Affiliation(s)
- Justyna Ciejka
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
- Virogenetics Laboratory of Virology, Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland;
| | - Michal Grzybala
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;
| | - Arkadiusz Gut
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
| | - Michal Szuwarzynski
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland;
| | - Krzysztof Pyrc
- Virogenetics Laboratory of Virology, Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland;
| | - Maria Nowakowska
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
| | - Krzysztof Szczubiałka
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
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13
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Kitagawa IL, Miyazaki CM, Pitol-Palin L, Okamoto R, de Vasconcellos LMR, Constantino CJL, Lisboa-Filho PN. Titanium-Based Alloy Surface Modification with TiO 2 and Poly(sodium 4-styrenesulfonate) Multilayers for Dental Implants. ACS APPLIED BIO MATERIALS 2021; 4:3055-3066. [PMID: 35014394 DOI: 10.1021/acsabm.0c01348] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Implant placement is an important repair method in dentistry and orthopedics. Increasing efforts have focused on optimizing the biocompatibility and osseointegration properties of titanium (Ti) and Ti-based alloys. In this work, Ti-based alloys were modified by the layer-by-layer (LbL) technique, which is a simple and versatile method for surface modification. The morphology and chemical structure of LbL films of poly(sodium 4-styrenesulfonate) (PSS) and Ti dioxide (TiO2) nanoparticles were first characterized employing ultraviolet-visible and Fourier-transform infrared spectroscopies as well as atomic force microscopy for further application in Ti-based alloy implants. The changes provoked by the LbL PSS/TiO2 film on the Ti-based alloy surfaces were then investigated by scanning electron microscopy and micro-Raman techniques. Finally, in vivo tests (immunolabeling and biomechanical analysis) performed with screw implants in rats suggested that PSS/TiO2 multilayers promote changes in both topography and chemical surface properties of the screw, providing beneficial effects for osteoblast activity. This simple and relatively low-cost growth process can open up possibilities to improve dental implants and, probably, bone implants in general.
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Affiliation(s)
- Igor L Kitagawa
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil.,Science and Technology of São Paulo, IFSP Federal Institute of Education, Campus Birigui, Birigui, São Paulo 16201-407, Brazil
| | - Celina M Miyazaki
- CCTS, Federal University of São Carlos, Sorocaba, São Paulo 18052-780, Brazil
| | - Letícia Pitol-Palin
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Roberta Okamoto
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Luana M R de Vasconcellos
- Institute of Science and Technology, Department of Biosciences and Oral Diagnosis, UNESP São Paulo State University, São José dos Campos, São Paulo 12245-000, Brazil
| | - Carlos J L Constantino
- School of Technology and Applied Sciences, Department of Physics, UNESP São Paulo State University, Presidente Prudente, São Paulo 19060-900, Brazil
| | - Paulo N Lisboa-Filho
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil
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14
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Pal S, Ramkumar B, Jugade S, Rao A, Naik A, Chakraborty B, Varma MM. Effect of single nanoparticle-nanopore interaction strength on ionic current modulation. SENSORS AND ACTUATORS. B, CHEMICAL 2020; 325:128785. [PMID: 34321714 PMCID: PMC8312308 DOI: 10.1016/j.snb.2020.128785] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Solid-state nanopores are rapidly emerging as promising platforms for developing various single molecule sensing applications. The modulation of ionic current through the pore due to translocation of the target molecule has been the dominant measurement modality in nanopore sensors. Here, we focus on the dwell time, which is the duration taken by the target molecule or particle to traverse the pore and study its dependence on the strength of interaction of the target with the pore using single gold nanoparticles (NPs) as targets interacting with a silicon nitride (SiN) nanopore. The strength of interaction, which in our case is electrostatic in nature, can be controlled by coating the nanoparticles with charged polymers. We report on an operating regime of this nanopore sensor, characterized by attractive interactions between the nanoparticle and the pore, where the dwell time is exponentially sensitive to the target-pore interaction. We used negatively and positively charged gold nanoparticles to control the strength of their interaction with the Silicon Nitride pore which is negatively charged. Our experiments revealed how this modulation of the electrostatic force greatly affects the dwell time. Positively charged NPs with strong attractive interactions with the pore resulted in increase of dwell times by 2-3 orders of magnitude, from 0.4 ms to 75.3 ms. This extreme sensitivity of the dwell time on the strength of interaction between a target and nanopore can be exploited in emerging nanopore sensor applications.
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Affiliation(s)
- Sohini Pal
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - B. Ramkumar
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Sanket Jugade
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Anjana Rao
- Division of Signaling and Gene Expression, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, United States
| | - Akshay Naik
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Banani Chakraborty
- Department of Chemical Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Manoj M. Varma
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
- Corresponding author. (M.M. Varma)
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15
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Lteif S, Abou Shaheen S, Schlenoff JB. The Thiouronium Group for Ultrastrong Pairing Interactions between Polyelectrolytes. J Phys Chem B 2020; 124:10832-10840. [PMID: 33174752 DOI: 10.1021/acs.jpcb.0c07456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Various charged groups may be used as a repeat unit in polyelectrolytes to provide physical interactions between oppositely charged polymers leading to phase separation. The materials formed thus are termed polyelectrolyte complexes or coacervates (PECs). The strength of pairing between positive, Pol+, and negative, Pol-, repeat units depends on the specific identity of the monomer repeat unit. In this work, the pairing strength of the thiouronium group, a cation closely related to guanidinium, is evaluated using a polythiouronium polyelectrolyte. Polymers containing guanidinium, notably polyarginine, a peptide, are known for their unusual behavior, such as the formation of like-charge ion pairs and hydrogen bonding. It is shown here that some of this behavior is carried over to polythiouroniums, which results in exceptionally strong interactions with polyanions such as polysulfonates and polycarboxylates. The resilience of the polythiouronium/Pol- interaction was evaluated using the buildup of polyelectrolyte multilayers at various salt concentrations and by breaking up preformed PECs with high concentrations of added salt. The thiouronium group even interacts strongly enough with polymeric zwitterions to enable complexation with this nominally weakly interacting, net-neutral polymer.
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Affiliation(s)
- Sandrine Lteif
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Samir Abou Shaheen
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
| | - Joseph B Schlenoff
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
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16
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Iqbal MH, Schroder A, Kerdjoudj H, Njel C, Senger B, Ball V, Meyer F, Boulmedais F. Effect of the Buffer on the Buildup and Stability of Tannic Acid/Collagen Multilayer Films Applied as Antibacterial Coatings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22601-22612. [PMID: 32374145 DOI: 10.1021/acsami.0c04475] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The deposition of polyelectrolyte multilayers, obtained by the layer-by-layer (LbL) method, is a well-established technology to design biocompatible and antibacterial coatings aimed at preventing implant-associated infections. Several types of LbL films have been reported to exhibit antiadhesive and/or antibacterial (contact-killing or release-killing) properties governed not only by the incorporated compounds but also by their buildup conditions or their postbuildup treatments. Tannic acid (TA), a natural polyphenol, is known to inhibit the growth of several bacterial strains. In this work, we developed TA/collagen (TA/COL) LbL films built in acetate or citrate buffers at pH 4. Surprisingly, the used buffer impacts not only the physicochemical but also the antibacterial properties of the films. When incubated in physiological conditions, both types of TA/COL films released almost the same amount of TA depending on the last layer and showed an antibacterial effect against Staphylococcus aureus only for citrate-built films. Because of their granular topography, TA/COL citrate films exhibited an efficient release-killing effect with no cytotoxicity toward human gingival fibroblasts. Emphasis is put on a comprehensive evaluation of the physicochemical parameters driving the buildup and the antibacterial property of citrate films. Specifically, complexation strengths between TA and COL are different in the presence of the two buffers affecting the LbL deposition. This work constitutes an important step toward the use of polyphenols as an antibacterial agent when incorporated in LbL films.
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Affiliation(s)
- Muhammad Haseeb Iqbal
- Université de Strasbourg, CNRS, Institut Charles Sadron, UPR 22, 67034 Strasbourg Cedex 2, France
| | - André Schroder
- Université de Strasbourg, CNRS, Institut Charles Sadron, UPR 22, 67034 Strasbourg Cedex 2, France
| | - Halima Kerdjoudj
- Université de Reims Champagne Ardenne, EA, 4691, Biomatériaux et Inflammation en Site Osseux (BIOS), SFR CAP Sante' (FED4231), 51100 Reims, France
- UFR d'Odontologie, Université de Reims Champagne Ardenne, 51100 Reims, France
| | - Christian Njel
- Institute for Applied Materials (IAM) and Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany
| | - Bernard Senger
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1121, 67085 Strasbourg Cedex, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000 Strasbourg, France
| | - Vincent Ball
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1121, 67085 Strasbourg Cedex, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000 Strasbourg, France
| | - Florent Meyer
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1121, 67085 Strasbourg Cedex, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 67000 Strasbourg, France
| | - Fouzia Boulmedais
- Université de Strasbourg, CNRS, Institut Charles Sadron, UPR 22, 67034 Strasbourg Cedex 2, France
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17
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Dos Santos de Macedo B, de Almeida T, da Costa Cruz R, Netto ADP, da Silva L, Berret JF, Vitorazi L. Effect of pH on the Complex Coacervation and on the Formation of Layers of Sodium Alginate and PDADMAC. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2510-2523. [PMID: 32050754 DOI: 10.1021/acs.langmuir.9b03216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, we investigated the thermodynamic features of a system based on oppositely charged polyelectrolytes, sodium alginate, and poly(diallyldimethylammonium chloride) (PDADMAC) at different pH values. Additionally, a comparison of the effects of the thermodynamic parameters on the growth of the layers based on the same polymers is presented. For this investigation, different techniques were combined to compare results from the association in solution and coassembled layers at the silicon surface. Dynamic light scattering (DLS) and isothermal titration calorimetry (ITC) were used for studies in solution, and the layer-by-layer technique was employed for the preparation of the polymer layers. Ellipsometry and atomic force microscopy (AFM) were used to characterize the layer thickness growth as a function of the solution pH, and interferometric confocal microscopy was employed to analyze the topography and roughness of the films. The titration of both polyelectrolytes in two different sequences of additions confirmed the mechanism; it involved a two-step process that was monitored by varying the enthalpy, as determined by ITC experiments, and the structural evolution of the aggregates into coacervates, according to DLS. The primary process is aggregation to form polyelectrolyte complexes having a smaller hydrodynamic diameter, which abruptly transit toward a secondary process because of the formation of coacervate particles that have a larger hydrodynamic diameter. Independent of pH and the sequence of addition, for the first process, both directions are entropically driven. However, the binding enthalpy (ΔHb) decreased with a decrease in the pH of the solution. The layers grown for the PDADMAC/sodium alginate system demonstrated pH sensitivity with either linear or exponential behavior, depending on the pH values of the polyelectrolyte solutions. The more endothermic process at pH 10 afforded layers with a smaller thickness and with linear growth according to the increase in the number of layers from 5 to 20. Decreases in the pH of the solution resulted in the layers growing exponentially; additionally, a decrease in the ΔHb of the association in the solution was observed. The layer thicknesses measured using ellipsometry and AFM data were in good agreement. Additionally, the influence of pH on the roughness and topography of the films was observed. Films from basic dipping solutions resulted in surfaces that were more homogeneous with less roughness; in contrast, films with more layers and those formed in a low-pH dipping solution were rougher and less homogeneous.
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Affiliation(s)
- Bruno Dos Santos de Macedo
- Laboratório de Quı́mica Analı́tica Fundamental e Aplicada, Instituto de Quı́mica - Universidade Federal Fluminense, R. Outeiro de São João Batista, s/n, Niterói, RJ CEP 24020-141, Brazil
| | - Tamiris de Almeida
- Programa de Pós-Graduação em Engenharia Metalúrgica, EEIMVR, Universidade Federal Fluminense, Avenida dos Trabalhadores, 420, Volta Redonda RJ CEP 27225-125, Brazil
| | | | - Annibal Duarte Pereira Netto
- Laboratório de Quı́mica Analı́tica Fundamental e Aplicada, Instituto de Quı́mica - Universidade Federal Fluminense, R. Outeiro de São João Batista, s/n, Niterói, RJ CEP 24020-141, Brazil
| | - Ladário da Silva
- Programa de Pós-Graduação em Engenharia Metalúrgica, EEIMVR, Universidade Federal Fluminense, Avenida dos Trabalhadores, 420, Volta Redonda RJ CEP 27225-125, Brazil
- Laboratório Multiusuários de Caracterização de Materiais, Instituto de Ciências Exatas - Universidade Federal Fluminense, R. Des. Ellis Hermydio Figueira, 783, Volta Redonda RJ CEP 27213-145, Brazil
| | - Jean-François Berret
- Laboratoire Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France
| | - Letícia Vitorazi
- Programa de Pós-Graduação em Engenharia Metalúrgica, EEIMVR, Universidade Federal Fluminense, Avenida dos Trabalhadores, 420, Volta Redonda RJ CEP 27225-125, Brazil
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18
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Song M, Zhu H, Ye L, Liu C, Xu Z. Strategically prolonged release of multiple antibacterial components from a thin film coating for synergistic effects against Staphylococcus aureus infections. RSC Adv 2019; 9:32683-32690. [PMID: 35529751 PMCID: PMC9073156 DOI: 10.1039/c9ra03365c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 08/17/2019] [Indexed: 01/01/2023] Open
Abstract
Biomaterial-associated infections (BAIs) remain a major challenge in clinical surgery because they can potentially cause serious disabilities in patients.
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Affiliation(s)
- Meijun Song
- Department of Respiratory Medicine
- Zhejiang Provincial People's Hospital
- Hangzhou
- China
- Department of Infectious Diseases
| | - Haidong Zhu
- Department of Radiology
- Ningbo Medical Center
- Lihuili Eastern Hospital
- Ningbo
- China
| | - Lin Ye
- Department of Emergency Medicine
- Ningbo No. 2 Hospital
- Ningbo
- China
| | - Chengxiang Liu
- Department of Emergency Medicine
- Ningbo No. 2 Hospital
- Ningbo
- China
| | - Zhaojun Xu
- Department of Intensive Care Unit
- Ningbo No. 2 Hospital
- Ningbo
- China
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19
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Sigolaeva LV, Pergushov DV, Oelmann M, Schwarz S, Brugnoni M, Kurochkin IN, Plamper FA, Fery A, Richtering W. Surface Functionalization by Stimuli-Sensitive Microgels for Effective Enzyme Uptake and Rational Design of Biosensor Setups. Polymers (Basel) 2018; 10:E791. [PMID: 30960716 PMCID: PMC6403641 DOI: 10.3390/polym10070791] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/29/2018] [Accepted: 07/12/2018] [Indexed: 11/16/2022] Open
Abstract
We highlight microgel/enzyme thin films that were deposited onto solid interfaces via two sequential steps, the adsorption of temperature- and pH-sensitive microgels, followed by their complexation with the enzyme choline oxidase, ChO. Two kinds of functional (ionic) microgels were compared in this work in regard to their adsorptive behavior and interaction with ChO, that is, poly(N-isopropylacrylamide-co-N-(3-aminopropyl)methacrylamide), P(NIPAM-co-APMA), bearing primary amino groups, and poly(N-isopropylacrylamide-co-N-[3-(dimethylamino) propyl]methacrylamide), P(NIPAM-co-DMAPMA), bearing tertiary amino groups. The stimuli-sensitive properties of the microgels in the solution were characterized by potentiometric titration, dynamic light scattering (DLS), and laser microelectrophoresis. The peculiarities of the adsorptive behavior of both the microgels and the specific character of their interaction with ChO were revealed by a combination of surface characterization techniques. The surface charge was characterized by electrokinetic analysis (EKA) for the initial graphite surface and the same one after the subsequent deposition of the microgels and the enzyme under different adsorption regimes. The masses of wet microgel and microgel/enzyme films were determined by quartz crystal microbalance with dissipation monitoring (QCM-D) upon the subsequent deposition of the components under the same adsorption conditions, on a surface of gold-coated quartz crystals. Finally, the enzymatic responses of the microgel/enzyme films deposited on graphite electrodes to choline were tested amperometrically. The presence of functional primary amino groups in the P(NIPAM-co-APMA) microgel enables a covalent enzyme-to-microgel coupling via glutar aldehyde cross-linking, thereby resulting in a considerable improvement of the biosensor operational stability.
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Affiliation(s)
- Larisa V Sigolaeva
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia.
| | - Dmitry V Pergushov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia.
| | - Marina Oelmann
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Simona Schwarz
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
| | - Monia Brugnoni
- Institute of Physical Chemistry II, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany.
| | - Ilya N Kurochkin
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia.
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygina Str. 4, 119334 Moscow, Russia.
| | - Felix A Plamper
- Institute of Physical Chemistry II, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany.
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany.
- Physical Chemistry of Polymeric Materials, Technical University of Dresden, Hohe Str. 6, 01069 Dresden, Germany.
| | - Walter Richtering
- Institute of Physical Chemistry II, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany.
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