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Di Santo R, Niccolini B, Romanò S, Vaccaro M, Di Giacinto F, De Spirito M, Ciasca G. Advancements in Mid-Infrared spectroscopy of extracellular vesicles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123346. [PMID: 37774583 DOI: 10.1016/j.saa.2023.123346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 08/07/2023] [Accepted: 09/02/2023] [Indexed: 10/01/2023]
Abstract
Extracellular vesicles (EVs) are lipid vesicles secreted by all cells into the extracellular space and act as nanosized biological messengers among cells. They carry a specific molecular cargo, composed of lipids, proteins, nucleic acids, and carbohydrates, which reflects the state of their parent cells. Due to their remarkable structural and compositional heterogeneity, characterizing EVs, particularly from a biochemical perspective, presents complex challenges. In this context, mid-infrared (IR) spectroscopy is emerging as a valuable tool, providing researchers with a comprehensive and label-free spectral fingerprint of EVs in terms of their specific molecular content. This review aims to provide an up-to-date critical overview of the major advancements in mid-IR spectroscopy of extracellular vesicles, encompassing both fundamental and applied research achievements. We also systematically emphasize the new possibilities offered by the integration of emerging cutting-edge IR technologies, such as tip-enhanced and surface-enhanced spectroscopy approaches, along with the growing use of machine learning for data analysis and spectral interpretation. Additionally, to assist researchers in navigating this intricate subject, our manuscript includes a wide and detailed collection of the spectral peaks that have been assigned to EV molecular constituents up to now in the literature.
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Affiliation(s)
- Riccardo Di Santo
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy.
| | - Benedetta Niccolini
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Sabrina Romanò
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Maria Vaccaro
- Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy
| | - Flavio Di Giacinto
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy
| | - Marco De Spirito
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy
| | - Gabriele Ciasca
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "A. Gemelli" IRCCS, 00168 Rome, Italy
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2
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Popova TO, Zhulina EB, Borisov OV. Interaction of Polyanionic and Polycationic Brushes with Globular Proteins and Protein-like Nanocolloids. Biomimetics (Basel) 2023; 8:597. [PMID: 38132536 PMCID: PMC10741738 DOI: 10.3390/biomimetics8080597] [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: 11/07/2023] [Revised: 11/25/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
A large number of experimental studies have demonstrated that globular proteins can be absorbed from the solution by both polycationic and polyanionic brushes when the net charge of protein globules is of the same or of the opposite sign with respect to that of brush-forming polyelectrolyte chains. Here, we overview the results of experimental studies on interactions between globular proteins and polycationic or polyanionic brushes, and present a self-consistent field theoretical model that allows us to account for the asymmetry of interactions of protein-like nanocolloid particles comprising weak (pH-sensitive) cationic and anionic groups with a positively or negatively charged polyelectrolyte brush. The position-dependent insertion free energy and the net charge of the particle are calculated. The theoretical model predicts that if the numbers of cationic and anionic ionizable groups of the protein are approximately equal, then the interaction patterns for both cationic and anionic brushes at equal offset on the "wrong side" from the isoelectric point (IEP), i.e., when the particle and the brush charge are of the same sign, are similar. An essential asymmetry in interactions of particles with polycationic and polyanionic brushes is predicted when fractions of cationic and anionic groups differ significantly. That is, at a pH above IEP, the anionic brush better absorbs negatively charged particles with a larger fraction of ionizable cationic groups and vice versa.
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Affiliation(s)
- Tatiana O. Popova
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Ekaterina B. Zhulina
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Oleg V. Borisov
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
- CNRS, Université de Pau et des Pays de l’Adour UMR 5254, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, 64053 Pau, France
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3
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Lisina S, Inam W, Huhtala M, Howaili F, Zhang H, Rosenholm JM. Nano Differential Scanning Fluorimetry as a Rapid Stability Assessment Tool in the Nanoformulation of Proteins. Pharmaceutics 2023; 15:pharmaceutics15051473. [PMID: 37242715 DOI: 10.3390/pharmaceutics15051473] [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: 02/22/2023] [Revised: 04/20/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The development and production of innovative protein-based therapeutics is a complex and challenging avenue. External conditions such as buffers, solvents, pH, salts, polymers, surfactants, and nanoparticles may affect the stability and integrity of proteins during formulation. In this study, poly (ethylene imine) (PEI) functionalized mesoporous silica nanoparticles (MSNs) were used as a carrier for the model protein bovine serum albumin (BSA). To protect the protein inside MSNs after loading, polymeric encapsulation with poly (sodium 4-styrenesulfonate) (NaPSS) was used to seal the pores. Nano differential scanning fluorimetry (NanoDSF) was used to assess protein thermal stability during the formulation process. The MSN-PEI carrier matrix or conditions used did not destabilize the protein during loading, but the coating polymer NaPSS was incompatible with the NanoDSF technique due to autofluorescence. Thus, another pH-responsive polymer, spermine-modified acetylated dextran (SpAcDEX), was applied as a second coating after NaPSS. It possessed low autofluorescence and was successfully evaluated with the NanoDSF method. Circular dichroism (CD) spectroscopy was used to determine protein integrity in the case of interfering polymers such as NaPSS. Despite this limitation, NanoDSF was found to be a feasible and rapid tool to monitor protein stability during all steps needed to create a viable nanocarrier system for protein delivery.
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Affiliation(s)
- Sofia Lisina
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Wali Inam
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Mikko Huhtala
- Structural Bioinformatics Laboratory, Faculty of Science and Engineering, Biochemistry, Åbo Akademi University, 20500 Turku, Finland
| | - Fadak Howaili
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Hongbo Zhang
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20500 Turku, Finland
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4
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Velk N, Keller J, Duschl C, Brezesinski G, Volodkin D. Interaction of Lysozyme with Poly(L-lysine)/Hyaluronic Acid Multilayers: An ATR-FTIR Study. Polymers (Basel) 2023; 15:polym15041036. [PMID: 36850324 PMCID: PMC9964902 DOI: 10.3390/polym15041036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/10/2023] [Accepted: 02/12/2023] [Indexed: 02/22/2023] Open
Abstract
Polyelectrolyte multilayers (PEM) loaded with bioactive molecules such as proteins serve as excellent mimics of an extracellular matrix and may find applications in fields such as biomedicine and cell biology. A question which is crucial to the successful employment of PEMs is whether conformation and bioactivity of the loaded proteins is preserved. In this work, the polarized attenuated total reflection Fourier transform infrared (ATR-FTIR) technique is applied to investigate the conformation of the protein lysozyme (Lys) loaded into the poly(L-lysine)/hyaluronic acid (PLL/HA) multilayers. Spectra are taken from the protein in the PEMs coated onto an ATR crystal during protein adsorption and desorption. For comparison, a similar investigation is performed for the case of Lys in contact with the uncoated crystal. The study highlights the presence of both "tightly" and "poorly bound" Lys fractions in the PEM. These fractions differ in their conformation and release behavior from the PEM upon washing. Comparison of spectra recorded with different polarizations suggests preferential orientation of alpha helical structures, beta sheets and turns in the "tightly bound" Lys. In contrast, the "poorly bound" fraction shows isotropic orientation and its conformation is well preserved.
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Affiliation(s)
- Natalia Velk
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Janos Keller
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Claus Duschl
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Dmitry Volodkin
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB), Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
- Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK
- Correspondence:
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5
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Pédehontaa-Hiaa G, Gaudière F, Khelif R, Morin-Grognet S, Labat B, Lutzweiler G, Le Derf F, Atmani H, Morin C, Ladam G. Polyvalent incorporation of anionic β-cyclodextrin polymers into Layer-by-Layer coatings. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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6
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Roupie C, Labat B, Morin-Grognet S, Echalard A, Ladam G, Thébault P. Dual-functional antibacterial and osteogenic nisin-based layer-by-layer coatings. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112479. [PMID: 34857265 DOI: 10.1016/j.msec.2021.112479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/15/2021] [Accepted: 10/07/2021] [Indexed: 01/12/2023]
Abstract
Implanted biomaterials can be regarded in a cornerstone in the domain of bone surgery. Their surfaces are expected to fulfil two particular requirements: preventing the settlement and the development of bacteria, and stimulating bone cells in view to foster osseointegration. Therefore, a modern approach consists in the design of dual functional coatings with both antibacterial and osteogenic features. To this end, we developed ultrathin Layer-by-Layer (LbL) coatings composed of biocompatible polyelectrolytes, namely chondroitin sulfate A (CSA) and poly-l-lysine (PLL). The coatings were crosslinked with genipin (GnP), a natural and biocompatible crosslinking agent, to increase their resistance against environmental changes, and to confer them adequate mechanical properties with regards to bone cell behaviors. Antibacterial activity was obtained with nisin Z, an antimicrobial peptide (AMP), which is active against gram-positive bacteria. The coatings had a significant bactericidal impact upon Staphylococcus aureus, with fully maintained bone cell adhesion, proliferation and osteogenic differentiation.
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Affiliation(s)
- Charlotte Roupie
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, Bd Maurice de Broglie, 76821 Mont Saint Aignan Cedex, France; Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 55 rue Saint-Germain, 27000 Évreux, France
| | - Béatrice Labat
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 55 rue Saint-Germain, 27000 Évreux, France
| | - Sandrine Morin-Grognet
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 55 rue Saint-Germain, 27000 Évreux, France
| | - Aline Echalard
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 55 rue Saint-Germain, 27000 Évreux, France
| | - Guy Ladam
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 55 rue Saint-Germain, 27000 Évreux, France
| | - Pascal Thébault
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, Bd Maurice de Broglie, 76821 Mont Saint Aignan Cedex, France.
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7
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Gnanasampanthan T, Beyer CD, Yu W, Karthäuser JF, Wanka R, Spöllmann S, Becker HW, Aldred N, Clare AS, Rosenhahn A. Effect of Multilayer Termination on Nonspecific Protein Adsorption and Antifouling Activity of Alginate-Based Layer-by-Layer Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5950-5963. [PMID: 33969986 DOI: 10.1021/acs.langmuir.1c00491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Layer-by-layer (LbL) assembly is a versatile platform for applying coatings and studying the properties of promising compounds for antifouling applications. Here, alginate-based LbL coatings were fabricated by alternating the deposition of alginic acid and chitosan or polyethylenimine to form multilayer coatings. Films were prepared with either odd or even bilayer numbers to investigate if the termination of the LbL coatings affects the physicochemical properties, resistance against the nonspecific adsorption (NSA) of proteins, and antifouling efficacy. The hydrophilic films, which were characterized using spectroscopic ellipsometry, water contact angle goniometry, ATR-FTIR spectroscopy, AFM, XPS, and SPR spectroscopy, revealed high swelling in water and strongly reduced the NSA of proteins compared to the hydrophobic reference. While the choice of the polycation was important for the protein resistance of the LbL coatings, the termination mattered less. The attachment of diatoms and settling of barnacle cypris larvae revealed good antifouling properties that were controlled by the termination and the charge density of the LbL films.
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Affiliation(s)
| | | | | | | | | | | | | | - Nick Aldred
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, United Kingdom
| | - Anthony S Clare
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom
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8
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Lutzweiler G, Barthes J, Charles AL, Ball V, Louis B, Geny B, Vrana NE. Improving the colonization and functions of Wharton's Jelly-derived mesenchymal stem cells by a synergetic combination of porous polyurethane scaffold with an albumin-derived hydrogel. ACTA ACUST UNITED AC 2020; 16:015005. [PMID: 33300500 DOI: 10.1088/1748-605x/abaf05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The development of neo-tissues assisted by artificial scaffolds is continually progressing, but the reproduction of the extracellular environment surrounding cells is quite complex. While synthetic scaffolds can support cell growth, they lack biochemical cues that can prompt cell proliferation or differentiation. In this study, Wharton's Jelly-derived mesenchymal stem cells are seeded on a polyurethane (PU) scaffold combined with a hydrogel based on bovine serum albumin (BSA). BSA hydrogel is obtained through thermal treatment. While such treatment leads to partial unfolding of the protein, we show that the extent of denaturation is small enough to maintain its bioactivity, such as protein binding. Therefore, BSA provides a suitable playground for cells inside the scaffold, allowing higher spreading, proliferation and matrix secretions. Furthermore, the poor mechanical properties of the hydrogel are compensated for by the porous PU scaffold, whose architecture is well controlled. We show that even though PU by itself can allow cell adhesion and protein secretion, cell proliferation is 3.5 times higher in the PU + BSA scaffolds as compared to pure PU after 21 d, along with the non-collagenous protein secretions (389 versus 134 μmmg -1). Conversely, the secretion of sulphated glycosaminoglycans is 12.3-fold higher in the scaffold made solely of PU. Thereby, we propose a simple approach to generating a hybrid material composed of a combination of PU and BSA hydrogel as a promising scaffold for tissue regeneration.
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Affiliation(s)
- G Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121, 11 rue Humann, 67085, Strasbourg Cedex, France
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9
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Kienle DF, Chaparro Sosa AF, Kaar JL, Schwartz DK. Polyelectrolyte Multilayers Enhance the Dry Storage and pH Stability of Physically Entrapped Enzymes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22640-22649. [PMID: 32352745 DOI: 10.1021/acsami.0c04964] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polyelectrolyte multilayers (PEMs) are attractive materials for immobilizing enzymes due to their unique ionic environment, which can prevent unfolding. Here, we demonstrated that the stability to dry storage and elevated pH were significantly enhanced when negatively charged nitroreductase (NfsB) was embedded in a PEM by depositing alternating layers of the enzyme and polycation (PC) onto porous silica particles. The PC strength (i.e., pKa) and the surface charge of the film were varied to probe the effects that internal and surface chemistry had on the pH stability of the entrapped NfsB. All films showed enhanced activity retention at elevated pH (>6), and inactivation at reduced pH (<6) similar to NfsB in solution, indicating that the primary stabilizing effect of immobilization was achieved through ionic interactions between NfsB and the PC and not through changes to the surface charge of the NfsB. Additionally, films that were stored dry at 4 °C for 1 month retained full activity, while those stored at room temperature lost 30% activity. Remarkably, at 50 °C, above the NfsB melting temperature, 40% activity was retained after 1 month of dry storage. Our results suggest that internal film properties are significantly more important than surface charge, which had minor effects on activity. Specifically, immobilization with the weak PC, poly(l-lysine), increased the optimal pH and the activity of immobilized NfsB (which we attribute to greater permeability), relative to immobilization with the strong PC, poly(diallyldimethylammonium chloride). However, NfsB was leached from the PLL film to a greater extent. Overall, these observations demonstrate that internal ionic cross-linking is key to the stabilizing effects of PEMs and that the pH response can be tuned by controlling the number of cross-links (e.g., by changing the strength of the PC). However, this may be at the cost of reduced loading, illustrating the necessity of simultaneously optimizing enzyme loading, internal ionic cross-linking, and substrate transport.
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Affiliation(s)
- Daniel F Kienle
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Andres F Chaparro Sosa
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Joel L Kaar
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
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10
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Lysozyme uptake into pharmaceutical grade fucoidan/chitosan polyelectrolyte multilayers under physiological conditions. J Colloid Interface Sci 2020; 565:555-566. [DOI: 10.1016/j.jcis.2020.01.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/10/2020] [Accepted: 01/12/2020] [Indexed: 01/28/2023]
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11
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Czeslik C, Wittemann A. Adsorption mechanism, secondary structure and local distribution of proteins at polyelectrolyte brushes. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-019-04590-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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12
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Levin A, Cinar S, Paulus M, Nase J, Winter R, Czeslik C. Analyzing protein-ligand and protein-interface interactions using high pressure. Biophys Chem 2019; 252:106194. [PMID: 31177023 DOI: 10.1016/j.bpc.2019.106194] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 05/29/2019] [Accepted: 05/29/2019] [Indexed: 01/06/2023]
Abstract
All protein function is based on interactions with the environment. Proteins can bind molecules for their transport, their catalytic conversion, or for signal transduction. They can bind to each other, and they adsorb at interfaces, such as lipid membranes or material surfaces. An experimental characterization is needed to understand the underlying mechanisms, but also to make use of proteins in biotechnology or biomedicine. When protein interactions are studied under high pressure, volume changes are revealed that directly describe spatial contributions to these interactions. Moreover, the strength of protein interactions with ligands or interfaces can be tuned in a smooth way by pressure modulation, which can be utilized in the design of drugs and bio-responsive interfaces. In this short review, selected studies of protein-ligand and protein-interface interactions are presented that were carried out under high pressure. Furthermore, a perspective on bio-responsive interfaces is given where protein-ligand binding is applied to create functional interfacial structures.
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Affiliation(s)
- Artem Levin
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Str. 4a, D-44227 Dortmund, Germany
| | - Süleyman Cinar
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Str. 4a, D-44227 Dortmund, Germany
| | - Michael Paulus
- Technische Universität Dortmund, Fakultät Physik/Delta, D-44221 Dortmund, Germany
| | - Julia Nase
- Technische Universität Dortmund, Fakultät Physik/Delta, D-44221 Dortmund, Germany
| | - Roland Winter
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Str. 4a, D-44227 Dortmund, Germany
| | - Claus Czeslik
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Str. 4a, D-44227 Dortmund, Germany.
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13
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Zhao M, Zacharia NS. Protein encapsulation via polyelectrolyte complex coacervation: Protection against protein denaturation. J Chem Phys 2018; 149:163326. [DOI: 10.1063/1.5040346] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Mengmeng Zhao
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Nicole S. Zacharia
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
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14
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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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15
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Guo S, Pranantyo D, Kang ET, Loh XJ, Zhu X, Jańczewski D, Neoh KG. Dominant Albumin-Surface Interactions under Independent Control of Surface Charge and Wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1953-1966. [PMID: 29319318 DOI: 10.1021/acs.langmuir.7b04117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding protein adsorption behaviors on solid surfaces constitutes an important step toward development of efficacious and biocompatible medical devices. Both surface charge and wettability have been shown to influence protein adsorption attributes, including kinetics, quantities, deformation, and reversibility. However, determining the dominant interaction in these surface-induced phenomena is challenging because of the complexity of inter-related mechanisms at the liquid/solid interface. Herein, we reveal the dominant interfacial forces in these essential protein adsorption attributes under the influence of a combination of surface charge and wettability, using quartz crystal microbalance with dissipation monitoring and atomic force microscopy-based force spectroscopy on a series of model surfaces. These surfaces were fabricated via layer-by-layer assembly, which allowed two-dimensional control of surface charge and wettability with minimal cross-parameter dependency. We focused on a soft globular protein, bovine serum albumin (BSA), which is prone to conformational changes during adsorption. The information obtained from the two techniques shows that both surface charge and hydrophobicity can increase the protein-surface interaction forces and the adsorbed amount. However, surface hydrophobicity triggered a greater extent of deformation in the adsorbed BSA molecules, leading to more dehydration, spreading, and resistance to elution by ionic strength changes regardless of the surface charge. The role played by the surface charge in the adsorbed protein conformation and extent of desorption induced by changes in the ionic strength is secondary to that of surface hydrophobicity. These findings advance the understanding of how surface chemistry and properties can be tailored for directing protein-substrate interactions.
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Affiliation(s)
- Shanshan Guo
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way, 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore , 9 Engineering Drive 1, 117576, Singapore
- Singapore Eye Research Institute , 11 Third Hospital Avenue, 168751, Singapore
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University , Hangzhou 310058, China
| | - Dominik Jańczewski
- Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - Koon Gee Neoh
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
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Multilayered films made from tannic acid and alkaline phosphatase with enzymatic activity and electrochemical behavior. J Colloid Interface Sci 2018; 512:722-729. [DOI: 10.1016/j.jcis.2017.10.101] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 10/26/2017] [Accepted: 10/26/2017] [Indexed: 10/18/2022]
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17
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Chatzikonstantinou AV, Gkantzou E, Gournis D, Patila M, Stamatis H. Stabilization of Laccase Through Immobilization on Functionalized GO-Derivatives. Methods Enzymol 2018; 609:47-81. [DOI: 10.1016/bs.mie.2018.05.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Vander Straeten A, Bratek-Skicki A, Germain L, D'Haese C, Eloy P, Fustin CA, Dupont-Gillain C. Protein-polyelectrolyte complexes to improve the biological activity of proteins in layer-by-layer assemblies. NANOSCALE 2017; 9:17186-17192. [PMID: 29095455 DOI: 10.1039/c7nr04345g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A standard method of protein immobilization is proposed, based on the use of protein-polyelectrolyte complexes (PPCs) as building blocks for layer-by-layer assembly. Thicker multilayers, with a higher polyelectrolyte fraction, are obtained with PPCs compared to single protein molecules. Biological activity is not only maintained, but specific activity is also higher, as demonstrated for lysozyme-poly(styrene sulfonate) complexes. This is attributed to the more hydrated state of the assemblies. This new method of protein immobilization opens up perspectives for biotechnology and biomedical applications.
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Affiliation(s)
- A 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.
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Talukdar H, Kundu S. Thin films of protein (BSA, lysozyme) - Polyelectrolyte (PSS) complexes show larger red-shift in optical emissions irrespective of protein conformation. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.04.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Cinar S, Möbitz S, Al-Ayoubi S, Seidlhofer BK, Czeslik C. Building Polyelectrolyte Multilayers with Calmodulin: A Neutron and X-ray Reflectivity Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3982-3990. [PMID: 28379700 DOI: 10.1021/acs.langmuir.7b00651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We have studied the formation and functional properties of polyelectrolyte multilayers where calmodulin (CaM) is used as a polyanion. CaM is known to populate distinct conformational states upon binding Ca2+ and small ligand molecules. Therefore, we have also probed the effects of Ca2+ ions and trifluoperazine (TFP) as ligand molecule on the interfacial structures. Multilayers with the maximum sequence PEI-(PSS-PAH)x-CaM-PAH-CaM-PAH have been deposited on silicon wafers and characterized by X-ray and neutron reflectometry. From the analysis of all data, several remarkable conclusions can be drawn. When CaM is deposited for the second time, a much thicker sublayer is produced than in the first CaM deposition step. However, upon rinsing with PAH, very thin CaM-PAH sublayers remain. There are no indications that ligand TFP can be involved in the multilayer buildup due to strong CaM-PAH interactions. However, there is a significant increase in the multilayer thickness upon removal of Ca2+ ions from holo-CaM and an equivalent decrease in the multilayer thickness upon subsequent saturation of apo-CaM with Ca2+ ions. Presumably, CaM can still be toggled between an apo and a holo state, when it is embedded in polyelectrolyte multilayers, providing an approach to design bioresponsive interfaces.
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Affiliation(s)
- Süleyman Cinar
- Department of Chemistry and Chemical Biology, TU Dortmund University , D-44221 Dortmund, Germany
| | - Simone Möbitz
- Department of Chemistry and Chemical Biology, TU Dortmund University , D-44221 Dortmund, Germany
| | - Samy Al-Ayoubi
- Department of Chemistry and Chemical Biology, TU Dortmund University , D-44221 Dortmund, Germany
| | | | - Claus Czeslik
- Department of Chemistry and Chemical Biology, TU Dortmund University , D-44221 Dortmund, Germany
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21
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Mihály J, Deák R, Szigyártó IC, Bóta A, Beke-Somfai T, Varga Z. Characterization of extracellular vesicles by IR spectroscopy: Fast and simple classification based on amide and CH stretching vibrations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:459-466. [PMID: 27989744 DOI: 10.1016/j.bbamem.2016.12.005] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 11/29/2016] [Accepted: 12/14/2016] [Indexed: 12/21/2022]
Abstract
Extracellular vesicles isolated by differential centrifugation from Jurkat T-cell line were investigated by attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR). Amide and CH stretching band intensity ratios calculated from IR bands, characteristic of protein and lipid components, proved to be distinctive for the different extracellular vesicle subpopulations. This proposed 'spectroscopic protein-to-lipid ratio', combined with the outlined spectrum-analysis protocol is valid also for low sample concentrations (0.15-0.05mg/ml total protein content) and can carry information about the presence of other non-vesicular formations such as aggregated proteins, lipoproteins and immune complexes. Detailed analysis of IR data reveals compositional changes of extracellular vesicles subpopulations: second derivative spectra suggest changes in protein composition from parent cell towards exosomes favoring proteins with β-turns and unordered motifs at the expense of intermolecular β-sheet structures. The IR-based protein-to-lipid assessment protocol was tested also for red blood cell derived microvesicles for which similar values were obtained. The potential applicability of this technique for fast and efficient characterization of vesicular components is high as the investigated samples require no further preparations and all the different molecular species can be determined in the same sample. The results indicate that ATR-FTIR measurements provide a simple and reproducible method for the screening of extracellular vesicle preparations. It is hoped that this sophisticated technique will have further impact in extracellular vesicle research.
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Affiliation(s)
- Judith Mihály
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary.
| | - Róbert Deák
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Imola Csilla Szigyártó
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Attila Bóta
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Tamás Beke-Somfai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Zoltán Varga
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
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What is really driving cell–surface interactions? Layer-by-layer assembled films may help to answer questions concerning cell attachment and response to biomaterials. Biointerphases 2016; 11:019009. [DOI: 10.1116/1.4943046] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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23
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Longo J, Garnier T, Mateescu M, Ponzio F, Schaaf P, Jierry L, Ball V. Stable Bioactive Enzyme-Containing Multilayer Films Based on Covalent Cross-Linking from Mussel-Inspired Adhesives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12447-12454. [PMID: 26509712 DOI: 10.1021/acs.langmuir.5b03329] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The use of immobilized enzymes is mandatory for the easy separation of the enzyme, the unreacted substrates, and the obtained products to allow repeated enzymatic assays without cumbersome purification steps. The immobilization procedure is however critical to obtain a high fraction of active enzyme. In this article, we present an enzyme immobilization strategy based on a catechol functionalized alginate. We demonstrate that alkaline phosphatase (ALP) remains active in multilayered films made with alginate modified with catechol moieties (AlgCat) for long duration, that is, up to 7 weeks, provided the multilayered architecture is cross-linked with sodium periodate. This cross-linking reaction allows to create covalent bonds between the amino groups of ALP and the quinone group carried by the modified alginate. In the absence of cross-linking, the enzymatic activity is rapidly lost and this reduction is mainly due to enzyme desorption. We also show that NaIO4 cross-linked (AlgCat-Alp)n films can be freeze-dried and reused at least 3 weeks later without lost in enzymatic activity.
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Affiliation(s)
- Johan Longo
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
| | - Tony Garnier
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
| | - Mihaela Mateescu
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
| | - Florian Ponzio
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
| | - Pierre Schaaf
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
- Ecole de Chimie, Polymères et Matériaux, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
- Institut d'Etudes Avancées de l'Université de Strasbourg , 5 allée du Général Rouvillois, 67083 Strasbourg, France
- International Center for Frontier Research in Chemistry , 8 allée Gaspard Monge, 67083 Strasbourg, France
- Institut Universitaire de France , 103 boulevard Saint-Michel, 75005 Paris, France
| | - Loïc Jierry
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université de Strasbourg, UPR 22 , 23 rue du Loess, BP 84047, 67034, Strasbourg Cedex 2, France
- Ecole de Chimie, Polymères et Matériaux, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
- Institut d'Etudes Avancées de l'Université de Strasbourg , 5 allée du Général Rouvillois, 67083 Strasbourg, France
- International Center for Frontier Research in Chemistry , 8 allée Gaspard Monge, 67083 Strasbourg, France
| | - Vincent Ball
- Biomatériaux et Bioingénierie, INSERM, UMR-S 1121 , 11 rue Humann, 67085 Strasbourg Cedex, France
- Faculté de Chirurgie Dentaire, Université de Strasbourg , 8 rue Sainte Elisabeth. 67000 Strasbourg Cedex, France
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24
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Osypova A, Magnin D, Sibret P, Aqil A, Jérôme C, Dupont-Gillain C, Pradier CM, Demoustier-Champagne S, Landoulsi J. Dual stimuli-responsive coating designed through layer-by-layer assembly of PAA-b-PNIPAM block copolymers for the control of protein adsorption. SOFT MATTER 2015; 11:8154-8164. [PMID: 26338028 DOI: 10.1039/c5sm01545f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this paper, we describe the successful construction, characteristics and interaction with proteins of stimuli-responsive thin nanostructured films prepared by layer-by-layer (LbL) sequential assembly of PNIPAM-containing polyelectrolytes and PAH. PAA-b-PNIPAM block copolymers were synthesized in order to benefit from (i) the ionizable properties of PAA, to be involved in the LbL assembly, and (ii) the sensitivity of PNIPAM to temperature stimulus. The impact of parameters related to the structure and size of the macromolecules (their molecular weight and the relative degree of polymerization of PAA and PNIPAM), and the interaction with proteins under physico-chemical stimuli, such as pH and temperature, are carefully investigated. The incorporation of PAA-b-PNIPAM into multilayered films is shown to be successful whatever the block copolymer used, resulting in slightly thicker films than the corresponding (PAA/PAH)n film. Importantly, the protein adsorption studies demonstrate that it is possible to alter the adsorption behavior of proteins on (PAA-b-PNIPAM/PAH)n surfaces by varying the temperature and/or the pH of the medium, which seems to be intimately related to two key factors: (i) the ability of PNIPAM units to undergo conformational changes and (ii) the structural changes of the film made of weak polyelectrolytes. The simplicity of construction of these PNIPAM block copolymer-based LbL coatings on a large range of substrates, combined with their highly tunable features, make them ideal candidates to be employed for various biomedical applications requiring the control of protein adsorption.
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Affiliation(s)
- A Osypova
- Institute of Condensed Matter and Nanosciences, Bio & Soft Matter, Université catholique de Louvain, Croix du Sud 1 (L7.04.01), 1348, Louvain-la-Neuve, Belgium.
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25
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Wu FG, Jiang YW, Sun HY, Luo JJ, Yu ZW. Complexation of Lysozyme with Sodium Poly(styrenesulfonate) via the Two-State and Non-Two-State Unfoldings of Lysozyme. J Phys Chem B 2015; 119:14382-92. [DOI: 10.1021/acs.jpcb.5b07277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fu-Gen Wu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Yao-Wen Jiang
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Hai-Yuan Sun
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Jun-Jie Luo
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Zhi-Wu Yu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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26
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Saha B, Saikia J, Das G. Correlating enzyme density, conformation and activity on nanoparticle surfaces in highly functional bio-nanocomposites. Analyst 2015; 140:532-42. [PMID: 25407103 DOI: 10.1039/c4an01639d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The biological activity of the immobilized enzyme is crucial for the performance of different nanoparticle mediated enzymatic assays, where enzymatic conversion can be used for label-free analyte detection. In this article we have addressed two significant aspects of enzyme-nanoparticle interactions. First, we have developed copper sulfide (CuS) nanoparticles with an average diameter of 25 nm as a potential enzyme-interface using trypsin protease as a model enzyme. CuS nanoparticles showed high trypsin immobilization capacity of about 14.0 mg m(-2) with the significant retention of native enzymatic activity (75-98%) at room temperature, even beyond the calculated tightly packed monolayer coverage (which is around 4.1 mg m(-2)). Second, we report a quantitative correlation between the structure-functional relationship and the density of immobilized trypsin on a nanoparticle surface. The in situ conformation of immobilized trypsin could be efficiently analyzed by fluorescence, circular dichroism and FT-IR spectroscopic measurements because of the small size of the nanoparticles. Trypsin molecules appear to retain their close-native tertiary and secondary structural features (with a small loss of 1-2% of helical content) in the entire surface density range (2.0-14.0 mg m(-2)) on the CuS nanoparticles. However, interestingly, at a low surface coverage (2.0 mg m(-2)), immobilized trypsin retains almost 98% of its native enzymatic activity, leading to a highly functional bio-nanocomposite. However, at higher surface coverages, the enzyme activity decreases to 77%, indicating the influence of steric crowding. Furthermore, the high functionality of the immobilized trypsin at low surface density on CuS nanoparticle was also confirmed by determining the kinetic parameters of enzymatic activity.
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Affiliation(s)
- Bedabrata Saha
- Centre for the Environment, Indian Institute of Technology Guwahati, Assam-781039, India.
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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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Štajner L, Požar J, Kovačević D. Complexation between lysozyme and sodium poly(styrenesulfonate): The effect of pH, reactant concentration and titration direction. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bhakta SA, Evans E, Benavidez TE, Garcia CD. Protein adsorption onto nanomaterials for the development of biosensors and analytical devices: a review. Anal Chim Acta 2015; 872:7-25. [PMID: 25892065 PMCID: PMC4405630 DOI: 10.1016/j.aca.2014.10.031] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 09/25/2014] [Accepted: 10/21/2014] [Indexed: 12/11/2022]
Abstract
An important consideration for the development of biosensors is the adsorption of the biorecognition element to the surface of a substrate. As the first step in the immobilization process, adsorption affects most immobilization routes and much attention is given into the research of this process to maximize the overall activity of the biosensor. The use of nanomaterials, specifically nanoparticles and nanostructured films, offers advantageous properties that can be fine-tuned to maximize interactions with specific proteins to maximize activity, minimize structural changes, and enhance the catalytic step. In the biosensor field, protein-nanomaterial interactions are an emerging trend that span across many disciplines. This review addresses recent publications about the proteins most frequently used, their most relevant characteristics, and the conditions required to adsorb them to nanomaterials. When relevant and available, subsequent analytical figures of merits are discussed for selected biosensors. The general trend amongst the research papers allows concluding that the use of nanomaterials has already provided significant improvements in the analytical performance of many biosensors and that this research field will continue to grow.
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Affiliation(s)
- Samir A Bhakta
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Elizabeth Evans
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Tomás E Benavidez
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Carlos D Garcia
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
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Cinar S, Czeslik C. Secondary structure and folding stability of proteins adsorbed on silica particles – Pressure versus temperature denaturation. Colloids Surf B Biointerfaces 2015; 129:161-8. [DOI: 10.1016/j.colsurfb.2015.03.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 02/04/2023]
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31
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Martin N, Ma D, Herbet A, Boquet D, Winnik FM, Tribet C. Prevention of thermally induced aggregation of IgG antibodies by noncovalent interaction with poly(acrylate) derivatives. Biomacromolecules 2014; 15:2952-62. [PMID: 25019321 DOI: 10.1021/bm5005756] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Prevention of thermal aggregation of antibodies in aqueous solutions was achieved by noncovalent association with hydrophobically modified poly(acrylate) copolymers. Using a polyclonal immunoglobin G (IgG) as a model system for antibodies, we have studied the mechanisms by which this multidomain protein interacts with polyanions when incubated at physiological pH and at temperatures below and above the protein unfolding/denaturation temperature, in salt-free solutions and in 0.1 M NaCl solutions. The polyanions selected were sodium poly(acrylates), random copolymers of sodium acrylate and N-n-octadecylacrylamide (3 mol %), and a random copolymer of sodium acrylate, N-n-octylacrylamide (25 mol %), and N-isopropylacrylamide (40 mol %). They were derived from two poly(acrylic acid) parent chains of Mw 5000 and 150000 g·mol(-1). The IgG/polyanion interactions were monitored by static and dynamic light scattering, fluorescence correlation spectroscopy, capillary zone electrophoresis, and high sensitivity differential scanning calorimetry. In salt-free solutions, the hydrophilic PAA chains form complexes with IgG upon thermal unfolding of the protein (1:1 w/w IgG/PAA), but they do not interact with native IgG. The complexes exhibit a remarkable protective effect against IgG aggregation and maintain low aggregation numbers (average degree of oligomerization <12 at a temperature up to 85 °C). These interactions are screened in 0.1 M NaCl and, consequently, PAAs lose their protective effect. Amphiphilic PAA derivatives (1:1 w/w IgG/polymer) are able to prevent thermal aggregation (preserving IgG monomers) or retard aggregation of IgG (formation of oligomers and slow growth), revealing the importance of both hydrophobic interactions and modulation of the Coulomb interactions with or without NaCl present. This study leads the way toward the design of new formulations of therapeutic proteins using noncovalent 1:1 polymer/protein association that are transient and require a markedly lower additive concentration compared to conventional osmolyte protecting agents. They do not modify IgG permanently, which is an asset for applications in therapeutic protein formulations since the in vivo efficacy of the protein should not be affected.
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Affiliation(s)
- Nicolas Martin
- Ecole Normale Supérieure-PSL Research University , Département de Chimie, 24, rue Lhomond, 75005 Paris, France
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Kastantin M, Langdon BB, Schwartz DK. A bottom-up approach to understanding protein layer formation at solid-liquid interfaces. Adv Colloid Interface Sci 2014; 207:240-52. [PMID: 24484895 PMCID: PMC4028386 DOI: 10.1016/j.cis.2013.12.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 12/05/2013] [Accepted: 12/17/2013] [Indexed: 11/25/2022]
Abstract
A common goal across different fields (e.g. separations, biosensors, biomaterials, pharmaceuticals) is to understand how protein behavior at solid-liquid interfaces is affected by environmental conditions. Temperature, pH, ionic strength, and the chemical and physical properties of the solid surface, among many factors, can control microscopic protein dynamics (e.g. adsorption, desorption, diffusion, aggregation) that contribute to macroscopic properties like time-dependent total protein surface coverage and protein structure. These relationships are typically studied through a top-down approach in which macroscopic observations are explained using analytical models that are based upon reasonable, but not universally true, simplifying assumptions about microscopic protein dynamics. Conclusions connecting microscopic dynamics to environmental factors can be heavily biased by potentially incorrect assumptions. In contrast, more complicated models avoid several of the common assumptions but require many parameters that have overlapping effects on predictions of macroscopic, average protein properties. Consequently, these models are poorly suited for the top-down approach. Because the sophistication incorporated into these models may ultimately prove essential to understanding interfacial protein behavior, this article proposes a bottom-up approach in which direct observations of microscopic protein dynamics specify parameters in complicated models, which then generate macroscopic predictions to compare with experiment. In this framework, single-molecule tracking has proven capable of making direct measurements of microscopic protein dynamics, but must be complemented by modeling to combine and extrapolate many independent microscopic observations to the macro-scale. The bottom-up approach is expected to better connect environmental factors to macroscopic protein behavior, thereby guiding rational choices that promote desirable protein behaviors.
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Affiliation(s)
- Mark Kastantin
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
| | - Blake B Langdon
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States.
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Ma Z, Bai J, Wang Y, Jiang X. Impact of shape and pore size of mesoporous silica nanoparticles on serum protein adsorption and RBCs hemolysis. ACS APPLIED MATERIALS & INTERFACES 2014; 6:2431-2438. [PMID: 24460090 DOI: 10.1021/am404860q] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
With the rapid development of nanotechnology, mesoporous silica nanoparticles (MSNs) with numerous forms and structures have been synthesized and extensively applied in biomedicine in the past decades. However, our knowledge about the biocompatibility of the developed MSNs has not matched their development. Therefore, in this work, we have synthesized sphere-shaped MSNs with different pore scales (s-SPs and l-SPs) and rod-shape (RPs-3) MSNs to evaluate the influence of the morphology and pore size on their interaction with serum proteins and red blood cells (RBCs). The adsorption of human albumin (HSA), globulin (HGG), and fibrinogen (HSF) onto different kinds of MSNs has been analyzed by pseudo second-order kinetic model, and the conformational changes of the adsorbed proteins have been studied by FTIR spectroscopy. We find that the conformation of absorbed HSA and HSF, while not HGG, will be affected by the pore size and morphology of the MSNs. The conformational changes of the adsorbed proteins will further affect their saturated adsorption capacity. However, the initial adsorption rate is only determined by the property of MSNs and proteins. Additional hemolysis assay shows that the pore size and morphology of the MSNs will also affect their hemolytic activity in RBCs which will be extremely depressed by the formation of protein corona. These systematic studies will provide an overall understanding in the blood compatibility of MSNs as well as useful guidelines for fabrication of blood-compatible nanomaterials.
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Affiliation(s)
- Zhifang Ma
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science , Changchun, Jilin, 130022, People's Republic of China
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Chen S, Zhang Q, Nakamoto T, Kawazoe N, Chen G. Highly active porous scaffolds of collagen and hyaluronic acid prepared by suppression of polyion complex formation. J Mater Chem B 2014; 2:5612-5619. [DOI: 10.1039/c4tb00780h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A polyion complex between collagen and hyaluronic acid can be suppressed using low MW salts to prepare highly active porous scaffolds.
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Affiliation(s)
- Shangwu Chen
- Tissue Regeneration Materials Unit
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba, Japan
- Department of Materials Science and Engineering
| | - Qin Zhang
- Tissue Regeneration Materials Unit
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba, Japan
- Department of Materials Science and Engineering
| | - Tomoko Nakamoto
- Tissue Regeneration Materials Unit
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba, Japan
| | - Naoki Kawazoe
- Tissue Regeneration Materials Unit
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba, Japan
| | - Guoping Chen
- Tissue Regeneration Materials Unit
- International Center for Materials Nanoarchitectonics
- National Institute for Materials Science
- Tsukuba, Japan
- Department of Materials Science and Engineering
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Subpicomolar sensing of hydrogen peroxide with ovalbumin-embedded chitosan/polystyrene sulfonate multilayer membrane. Anal Biochem 2013; 440:49-55. [DOI: 10.1016/j.ab.2013.04.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 04/26/2013] [Accepted: 04/29/2013] [Indexed: 11/21/2022]
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Sun J, Ruchmann J, Pallier A, Jullien L, Desmadril M, Tribet C. Unfolding of Cytochrome c upon Interaction with Azobenzene-Modified Copolymers. Biomacromolecules 2012; 13:3736-46. [DOI: 10.1021/bm301200p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jing Sun
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Juliette Ruchmann
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - A. Pallier
- ESPCI, Physico-Chimie
des Polymeres et Milieux Disperses, CNRS UMR7615, 10 rue Vauquelin, 75005 Paris, France
| | - L. Jullien
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - M. Desmadril
- Laboratoire de Modélisation
et d’Ingénierie des Protéines, UMR8619, Université de Paris-Sud, Bât 430, F-91405
ORSAY CEDEX, France
| | - Christophe Tribet
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
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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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Amorosi C, Michel M, Avérous L, Toniazzo V, Ruch D, Ball V. Plasma polymer films as an alternative to (PSS-PAH)n or (PSS-PDADMAC)n films to retain active enzymes in exponentially growing polyelectrolyte multilayers. Colloids Surf B Biointerfaces 2012; 97:124-31. [DOI: 10.1016/j.colsurfb.2012.04.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Revised: 04/14/2012] [Accepted: 04/19/2012] [Indexed: 11/17/2022]
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Abdelkebir K, Morin-Grognet S, Gaudière F, Coquerel G, Labat B, Atmani H, Ladam G. Biomimetic layer-by-layer templates for calcium phosphate biomineralization. Acta Biomater 2012; 8:3419-28. [PMID: 22683877 DOI: 10.1016/j.actbio.2012.05.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/25/2012] [Accepted: 05/30/2012] [Indexed: 10/28/2022]
Abstract
Carboxylated, sulfated and/or phosphorylated surfaces are admitted as potential optimal templates for biomimetic deposition of calcium phosphate (CaP) coatings in view of improving implants' osseointegration. Layer-by-layer films were built up consisting of anionic chondroitin sulfate (ChS), a biological carboxylated and sulfated polysaccharide and cationic poly(l-lysine) (PLL). The films were used as soft matrices to immobilize a model phosphoprotein, phosvitin (PhV). The respective roles of ChS, PLL and PhV terminal layers on the heterogeneous nucleation kinetics and the structure of CaP deposits obtained from supersaturated solutions were inspected. Critical supersaturation ratios and induction times preceding heterogeneous nucleation were precisely determined and interpreted within the framework of classical nucleation theory in order to derive the effective interfacial energies of CaP crystals. It was found that the potency of terminal layers toward CaP nucleation increased in the order: PLL<ChS<PhV. Beyond a supersaturation threshold, PhV-terminated films exerted unique influence on the nucleation kinetics, maintaining the induction time at a constant value owing to conformational change of the PhV molecules upon calcium bridging. Promisingly, all films templated the deposition of thin (a few micrometer thick) uniform coatings of octacalcium phosphate and possibly hydroxyapatite, the two most relevant biological phases of CaP.
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40
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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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Fabrication of switchable protein resistant and adhesive multilayer membranes. Colloids Surf B Biointerfaces 2012; 94:118-24. [PMID: 22336095 DOI: 10.1016/j.colsurfb.2012.01.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 01/20/2012] [Accepted: 01/20/2012] [Indexed: 10/14/2022]
Abstract
Fabrication of protein adhesive and resistant surfaces based on chitosan/polystyrene sulfonate (CHI/PSS) multilayer membranes is presented. Adsorption behavior of bovine serum albumin (BSA) and lysozyme to CHI/PSS multilayer was studied by simple adsorption method and under pressure driven (ultrafiltration) conditions. The protein incorporated membranes were characterized by FT-IR, UV-vis, SEM and AFM. The loading of proteins to the multilayer was found to be dependent on the nature of protein, pH, number of bilayers, methods of adsorption and time of adsorption. Simple adsorption resulted in BSA adhesive layers with some conformational changes at higher number of bilayers. Ultrafiltration leads to protein repellence at higher number of bilayers which is attributed to the presence of irremovable water. Lysozyme adsorption/sorption varied with pH. Surface coverage dominates at pH close to pI and at pH 5 under ultraflitration condition where as simple adsorption resulted in protein repellence at pI. The secondary structure of adsorbed lysozyme is preserved for a wide pH range (5-11). Desorption study of lysozyme adsorbed membranes at pH 8.8 was carried out to understand the adsorption/sorption of protein. Diffusion of the sorbed lysozyme from the inner layers to the surface is found to take place at lower concentrations of NaCl.
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Abdelkebir K, Gaudière F, Morin-Grognet S, Coquerel G, Atmani H, Labat B, Ladam G. Protein-triggered instant disassembly of biomimetic Layer-by-Layer films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14370-14379. [PMID: 22007998 DOI: 10.1021/la2033109] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Layer-by-Layer (LbL) coatings are promising tools for the biofunctionalization of biomaterials, as they allow stress-free immobilization of proteins. Here, we explore the possibility to immobilize phosvitin, a highly phosphorylated protein viewed as a model of bone phosphoproteins and, as such, a potential promotive agent of surface-directed biomineralization, into biomimetic LbL architectures. Two immobilization protocols are attempted, first, using phosvitin as the polyanionic component of phosvitin/poly-(L-lysine) films and, second, adsorbing it onto preformed chondroitin sulfate/poly-(L-lysine) films. Surprisingly, it is neither possible to embed phosvitin as the constitutive polyanion of the LbL architectures nor to adsorb it atop preformed films. Instead, phosvitin triggers instant massive film disassembly. This unexpected, incidentally detected behavior constitutes the first example of destructive interactions between LbL films and a third polyelectrolyte, a fortiori a protein, which might open a route toward new stimuli-responsive films for biosensing or drug delivery applications. Interestingly, additional preliminary results still indicate a promotive effect of phosvitin-containing remnant films on calcium phosphate deposition.
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Affiliation(s)
- Khalil Abdelkebir
- Laboratoire de Biophysique et Biomatériaux (La2B), SMS EA 3233, IMR FED 4114, Université de Rouen, Centre Universitaire d'Evreux, 1 rue du 7ème Chasseurs, BP 281, 27002 Evreux Cedex, France
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Müller M, Kessler B. Deposition from dopamine solutions at Ge substrates: an in situ ATR-FTIR study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12499-12505. [PMID: 21866968 DOI: 10.1021/la202908b] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Deposition from dopamine (DA) solutions at germanium (Ge) model substrates was monitored under stationary conditions using surface sensitive in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. ATR-FTIR spectra of the interfacial organic layer formed upon contact of TRIS buffered aqueous DA solutions to a Ge internal reflection element (IRE) showed conveniently strong diagnostic IR absorption bands, which were increasing with deposition time up to at least 6 h. Comparison of IR spectra of unreacted pristine DA, surface reacted, and bulk reacted material confirmed chemical reactions of DA to a polymerizate according to the literature. The found IR bands could be assigned to aromatic as well as C-O single bond moieties. The kinetic courses of the diagnostic band integrals showed an initial increase and saturation of the deposition after around 300 min, which could be empirically represented by an exponential damping function revealing a rather small kinetic constant. Highest deposition levels were found at pH = 8.5 (TRIS buffer or NaOH) in contrast to pH = 6.2, where no deposition occurred. Minor deposition was found in the presence of salt or at ZnSe instead of Ge due to the absence of reactive hydroxyl groups. The concentration dependence of DA deposition showed an initial increase and a saturation beginning at around 0.4 mg/mL (0.0022 M), where around 50 nm thick films featuring granular surface morphologies are formed. The adsorbed species are suggested to be smaller bulk reacted DA polymerizate particles with reactive end groups. Rinsing the formed films by pure TRIS buffer resulted in a time dependent release of deposited organic material by ≈23%, which could be represented by an exponential decay function. A saturation of the release after around 100 min and a larger kinetic constant compared to deposition could be determined. The released material is suggested to be larger aggregated bulk reacted DA polymerizate particles loosely bound to the surface by weak interaction forces.
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Affiliation(s)
- Martin Müller
- Leibniz Institute of Polymer Research Dresden, Department of Polyelectrolytes and Dispersions, Hohe Strasse 6, D-01069 Dresden, Germany.
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Chien HW, Tan SF, Wei KL, Tsai WB. Modulation of the functions of osteoblast-like cells on poly(allylamine hydrochloride) and poly(acrylic acid) multilayer films. Colloids Surf B Biointerfaces 2011; 88:297-303. [PMID: 21798725 DOI: 10.1016/j.colsurfb.2011.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 06/17/2011] [Accepted: 07/04/2011] [Indexed: 01/02/2023]
Abstract
Deposition of layer-by-layer polyelectrolyte multilayer (PEM) films has been a widely applied surface modification technique to improve the biocompatibility of biomaterials. The objective of this study was to investigate the impact of the deposition of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) multilayer films on adhesion, growth and differentiation of osteoblasts-like MG63 cells. PAH and PAA were deposited sequentially onto tissue culture polystyrene at either pH 2.0 or pH 6.5 with 4-21 layers. While the MG63 cells attached poorly on the PAH/PAA multilayer films deposited at pH 2.0, while the cells adhered to the PEM films deposited at pH 6.5, depending on layer numbers. Cell adhesion, proliferation and osteogenic activities (alkaline phosphatase activity, expression of osteogenic marker genes and mineralization) were highest on the 4-layer PAH/PAA film and decreased with increasing layer numbers. On the other hand, the behavior of MG63 cells did not show any difference on the adjacent even and odd layers, except PEM4 and PEM5, i.e. the surface charges of the PAH/PAA multilayer films with over ten layers seem indifferent to osteoblastic functions. The results in this study suggested that the mechanical properties of PEM films may play a critical role in modulating the behavior of osteoblasts, providing guidance for application of PEM films to osteopaedic implants.
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Affiliation(s)
- Hsiu-Wen Chien
- National Taiwan University, Department of Chemical Engineering, Taipei, Taiwan
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Lavalle P, Voegel JC, Vautier D, Senger B, Schaaf P, Ball V. Dynamic aspects of films prepared by a sequential deposition of species: perspectives for smart and responsive materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:1191-221. [PMID: 21264957 DOI: 10.1002/adma.201003309] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 10/26/2010] [Indexed: 05/23/2023]
Abstract
The deposition of surface coatings using a step-by-step approach from mutually interacting species allows the fabrication of so called "multilayered films". These coatings are very versatile and easy to produce in environmentally friendly conditions, mostly from aqueous solution. They find more and more applications in many hot topic areas, such as in biomaterials and nanoelectronics but also in stimuli-responsive films. We aim to review the most recent developments in such stimuli-responsive coatings based on layer-by-layer (LBL) depositions in relationship to the properties of these coatings. The most investigated stimuli are based on changes in ionic strength, temperature, exposure to light, and mechanical forces. The possibility to induce a transition from linear to exponential growth in thickness and to change the charge compensation from "intrinsic" to "extrinsic" by controlling parameters such as temperature, pH, and ionic strength are the ways to confer their responsiveness to the films. Chemical post-modifications also allow to significantly modify the film properties.
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Affiliation(s)
- Philippe Lavalle
- Institut National de la Santé et de la Recherche Médicale, Unité 977, 11 rue Humann, Strasbourg Cedex, France
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Wang Y, Hosta-Rigau L, Lomas H, Caruso F. Nanostructured polymer assemblies formed at interfaces: applications from immobilization and encapsulation to stimuli-responsive release. Phys Chem Chem Phys 2011; 13:4782-801. [DOI: 10.1039/c0cp02287j] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Nagy K, Pilbat AM, Groma G, Szalontai B, Cuisinier FJG. Casein aggregates built step-by-step on charged polyelectrolyte film surfaces are calcium phosphate-cemented. J Biol Chem 2010; 285:38811-7. [PMID: 20921229 PMCID: PMC2998142 DOI: 10.1074/jbc.m110.151167] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 09/20/2010] [Indexed: 11/06/2022] Open
Abstract
The possible mechanism of casein aggregation and micelle buildup was studied in a new approach by letting α-casein adsorb from low concentration (0.1 mg·ml(-1)) solutions onto the charged surfaces of polyelectrolyte films. It was found that α-casein could adsorb onto both positively and negatively charged surfaces. However, only when its negative phosphoseryl clusters remained free, i.e. when it adsorbed onto a negative surface, could calcium phosphate (CaP) nanoclusters bind to the casein molecules. Once the CaP clusters were in place, step-by-step building of multilayered casein architectures became possible. The presence of CaP was essential; neither Ca(2+) nor phosphate could alone facilitate casein aggregation. Thus, it seems that CaP is the organizing motive in the casein micelle formation. Atomic force microscopy revealed that even a single adsorbed casein layer was composed of very small (in the range of tens of nanometers) spherical forms. The stiffness of the adsorbed casein layer largely increased in the presence of CaP. On this basis, we can imagine that casein micelles emerge according to the following scheme. The amphipathic casein monomers aggregate into oligomers via hydrophobic interactions even in the absence of CaP. Full scale, CaP-carrying micelles could materialize by interlocking these casein oligomers with CaP nanoclusters. Such a mechanism would not contradict former experimental results and could offer a synthesis between the submicelle and the block copolymer models of casein micelles.
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Affiliation(s)
- Krisztina Nagy
- From the Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, H-6071 Szeged, Hungary and
| | - Ana-Maria Pilbat
- From the Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, H-6071 Szeged, Hungary and
| | - Géza Groma
- From the Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, H-6071 Szeged, Hungary and
| | - Balázs Szalontai
- From the Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, H-6071 Szeged, Hungary and
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48
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Müller M, Ouyang W, Kessler B. Dichroic ATR-FTIR spectroscopy on oriented α-helical poly(l-lysine) multilayered with polyanions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:709-716. [PMID: 20833103 DOI: 10.1016/j.saa.2010.05.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 05/21/2010] [Accepted: 05/24/2010] [Indexed: 05/29/2023]
Abstract
The preparation and spectroscopic and microscopic characterization of oriented polyelectrolyte multilayers (PEM) interesting for defined nanostructured functional materials and surfaces are reviewed. Oriented PEM were generated by consecutively adsorbing α-helical poly(l-lysine) (PLL) and oppositely charged polyanions like poly(vinylsulfate) (PVS) or poly(styrene sulfonate) (PSS) at silicon substrates texturized by parallel nanoscopic surface grooves, respectively. Dichroic Attenuated Total Reflexion Fourier Transform Infrared (ATR-FTIR) spectroscopy was used to study the conformation and macromolecular order of stiff polyelectrolytes within PEM. High order parameters up to S=0.82 (S=1 for high, S=0 for low order) were obtained from the dichroic ratios of the Amide I and Amide II bands suggesting a significant alignment of charged α-helical polypeptides in PEM. For PEM consisting of PLL/polyanion the S values significantly increased with increasing molecular weight of PLL and with decreasing molecular weight of the polyanion. These spectroscopic findings were supported by SFM images on PEM-PLL/PVS with high molecular PLL and PEM-PLL/PSS with low molecular PSS, which both showed anisotropically oriented worm-like structures, while PEM-PLL/PVS with low molecular PLL and PEM-PLL/PSS with high molecular PSS showed no orientation features.
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Affiliation(s)
- M Müller
- Leibniz Institute of Polymer Research Dresden e.V. (IPF), Hohe Strasse 6, D-01069 Dresden, Germany.
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49
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Martins GV, Merino EG, Mano JF, Alves NM. Crosslink effect and albumin adsorption onto chitosan/alginate multilayered systems: an in situ QCM-D study. Macromol Biosci 2010; 10:1444-55. [PMID: 21125694 DOI: 10.1002/mabi.201000193] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 07/13/2010] [Indexed: 12/12/2022]
Abstract
The adsorption of HSA onto CHI/ALG multilayer assemblies was assessed in situ using QCM-D. It was found that the behavior of HSA on biomaterials surface can be tuned by adjusting parameters of the polyelectrolyte system such as pH, layer number, crosslinker and polymer terminal layer. Our results confirmed the key role of electrostatic interactions during HSA adsorption, since oppositely charged surfaces were more effective in promoting protein adhesion. QCM-D data revealed that crosslinking (CHI/ALG)(5) CHI films allows HSA to become adsorbed in physiological conditions. Our results suggested that the biological potential of biopolymers and the mild conditions of the LbL technique turn these natural nanoassemblies into a suitable choice to be used as pH-sensitive coatings.
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Affiliation(s)
- Gabriela V Martins
- Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.
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50
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Shen H, Watanabe J, Akashi M. Polyelectrolyte multilayers-modified polystyrene plate improves conventional immunoassay: full covering of the blocking reagent. Anal Chem 2010; 81:6923-8. [PMID: 19606875 DOI: 10.1021/ac900985x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, we fabricated polyelectrolyte multilayers (PEMs) on a polystyrene (PS) plate by a simple and novel alternate drop coating process (Acta Biomaterialia 2008, 4, 1255-1262), leading to the construction of a functional platform for improving conventional enzyme-linked immunosorbent assay (ELISA) systems. Poly(diallyldimethylammonium chloride) (PDDA) and poly(sodium 4-styrenesulfonate) (PSS) were used as cationic and anionic polyelectrolytes, and then positively or negatively charged surfaces were obtained on the PEMs. The PDDA/PSS PEMs on the PS plate had the following favorable characteristics. On the positive PEMs, the coverage of the blocking reagent (ovalbumin from egg white: OVA) was over 100% by electrostatic interaction between the protein and PEMs, hence, nonspecific adsorption from the secondary antibody was efficiently suppressed. Moreover, the positive PEMs showed higher sensitivity on the ELISA than the negative PEMs, including the PS plate. Regularly oscillating behavior for sensitivity (specific signal-to-noise ratio) was observed on 1-10-step assemblies. The calibration curves for antigen detection on the positive PEMs had wide range of concentration from 0.002 to 5 microg/mL, and largest change in signal as compared with the negative PEMs and the PS plate. In summary, we discovered that positive PEMs possessed excellent performance for ELISA systems, and PEMs could easily improve the immunoassay with a convenient process and diverse substrates.
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Affiliation(s)
- Heyun Shen
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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