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Gamble LJ, Radford D, Grainger DW, Castner DG. Quantitative evaluation of perfluorinated alkanethiol molecular order on gold surfaces. Biointerphases 2023; 18:031009. [PMID: 37306557 PMCID: PMC10264085 DOI: 10.1116/6.0002720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/15/2023] [Accepted: 05/19/2023] [Indexed: 06/13/2023] Open
Abstract
Self-assembled monolayers (SAMs) of perfluoroalkanethiols [CF3(CF2)xCH2CH2SH (x = 3, 5, 7, and 9)] on gold were characterized by x-ray photoelectron spectroscopy (XPS), near edge x-ray absorption fine structure (NEXAFS), and static time-of-flight secondary ion mass spectrometry (ToF-SIMS). Perfluoroalkanethiols of several chain lengths were synthesized using a known hydride reduction method for transforming commercially available perfluoroalkyliodides to corresponding perfluoroalkanethiols. This strategy provides improved product yields compared to other known routes based on hydrolysis from the common thioacetyl perfluoroalkyl intermediate. Angle-dependent XPS analysis revealed that CF3(CF2)xCH2CH2SH (x = 5, 7, and 9; F6, F8, and F10, respectively) SAMs on gold exhibited significant enrichment of the terminal CF3 group at the outer monolayer surface with the sulfur present as a metal-bound thiolate located at the monolayer-gold interface. XPS of the CF3(CF2)3CH2CH2SH (F4) monolayer revealed a thin film with a significant (>50%) amount of hydrocarbon contamination consistent with poorly organized monolayers, while the longest thiol (F10) showed XPS signals attributed to substantial ordering and anisotropy. ToF-SIMS spectra from all four SAMs contained molecular ions representative of the particular perfluorinated thiol used to prepare the monolayer. NEXAFS methods were used to determine degrees of ordering and average tilt for molecules comprising monolayers. The SAMs prepared from the longest (F10) thiols exhibited the highest degree of ordering with the molecular axis nearly perpendicular to the gold surface. The degree of ordering decreased significantly with decreasing length of the perfluorocarbon tail.
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Affiliation(s)
- Lara J. Gamble
- Department of Bioengineering, National ESCA and Surface Analysis Center for Biomedical Problems, Box 351653 Seattle, Washington 98195-1653
| | - David Radford
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
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Chaber P, Tylko G, Włodarczyk J, Nitschke P, Hercog A, Jurczyk S, Rech J, Kubacki J, Adamus G. Surface Modification of PHBV Fibrous Scaffold via Lithium Borohydride Reduction. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7494. [PMID: 36363086 PMCID: PMC9653721 DOI: 10.3390/ma15217494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/17/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
In this study, lithium borohydride (LiBH4) reduction was used to modify the surface chemistry of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) fibers. Although the most common reaction employed in the surface treatment of polyester materials is hydrolysis, it is not suitable for fiber modification of bacterial polyesters, which are highly resistant to this type of reaction. The use of LiBH4 allowed the formation of surface hydroxyl groups under very mild conditions, which was crucial for maintaining the fibers' integrity. The presence of these groups resulted in a noticeable improvement in the surface hydrophilicity of PHBV, as revealed by contact angle measurements. After the treatment with a LiBH4 solution, the electrospun PHBV fibrous mat had a significantly greater number of viable osteoblast-like cells (SaOS-2 cell line) than the untreated mat. Moreover, the results of the cell proliferation measurements correlated well with the observed cell morphology. The most flattened SaOS-2 cells were found on the surface that supported the best cell attachment. Most importantly, the results of our study indicated that the degree of surface modification could be controlled by changing the degradation time and concentration of the borohydride solution. This was of great importance since it allowed optimization of the surface properties to achieve the highest cell-proliferation capacity.
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Affiliation(s)
- Paweł Chaber
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska 34, 41-819 Zabrze, Poland
| | - Grzegorz Tylko
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Gronostajowa 9, 30-387 Kraków, Poland
| | - Jakub Włodarczyk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska 34, 41-819 Zabrze, Poland
| | - Paweł Nitschke
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska 34, 41-819 Zabrze, Poland
| | - Anna Hercog
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska 34, 41-819 Zabrze, Poland
| | - Sebastian Jurczyk
- Institute for Engineering of Polymer Materials and Dyes, Łukasiewicz Research Network, Marii Skłodowskiej-Curie 55, 87-100 Toruń, Poland
| | - Jakub Rech
- Department of Biotechnology and Genetic Engineering, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Poniatowskiego 15, 40-055 Katowice, Poland
| | - Jerzy Kubacki
- Faculty of Science and Technology, Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Grażyna Adamus
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska 34, 41-819 Zabrze, Poland
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Lam M, Falentin-Daudré C. Characterization of plasmatic proteins adsorption on poly(styrene sodium sulfonate) functionalized silicone surfaces. Biophys Chem 2022; 285:106804. [PMID: 35339945 DOI: 10.1016/j.bpc.2022.106804] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 11/28/2022]
Abstract
Proteins adsorption occurs spontaneously on biomaterial upon insertion within the body. The resulting protein layer influences biomaterial biocompatibility through enhanced bio-integration or, on the contrary, adverse reactions. Furthermore, upon adsorption, proteins can undergo modifications of their structure and, ultimately, their physicochemical properties and activity. Hence, the understanding of protein adsorption on implanted materials appears essential, as exemplified by silicone breast prostheses that might lead to serious health issues. Surface modifications with a bioactive polymer, poly(styrene sodium sulfonate)-polyNaSS, on a hydrophobic silicone surface that composes breast implants, have been successfully performed under UV irradiation by a radical surface polymerization. This strategy enhances cell biocompatibility and antibacterial features. Although detailed insights related to the mechanism are still scarce, polyNaSS is supposed to promote changes in the conformation and/or orientation of adsorbed plasma proteins, reducing the odd for a biofilm to form. The present work addresses more in-depth structural investigations of the adsorbed state of two plasma proteins: Bovine Serum Albumin (BSA), as a model protein, and fibronectin (FN), for its role in cell adhesion. Using Atomic force microscopy (AFM), we report that polyNaSS showed no significant impact on the BSA structure conversely to the FN one. However, imaging findings with AFM clearly outlined a change in the structural organization of FN, going from a nano fibrillar assembly with an average length of 130 nm to a globular one when the surface was grafted. Thus, it is highlighted that polyNaSS interacts specifically with FN. In addition, cell spreading assay of L929 fibroblasts on FN-coated surfaces with optical microscopy indicated no significant impact of the change in FN structure upon fibroblasts adhesion, which displayed active elongated shapes. The present features are crucial for understanding the cell adhesion mechanism induced by surface modification.
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Affiliation(s)
- M Lam
- LBPS/CSPBAT, UMR CNRS 7244, Institut Galilée, Université Sorbonne Paris Nord, 99 avenue JB Clément, 93430 Villetaneuse, France
| | - C Falentin-Daudré
- LBPS/CSPBAT, UMR CNRS 7244, Institut Galilée, Université Sorbonne Paris Nord, 99 avenue JB Clément, 93430 Villetaneuse, France.
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Warning LA, Zhang Q, Baiyasi R, Landes CF, Link S. Nanoscale Surface-Induced Unfolding of Single Fibronectin Is Restricted by Serum Albumin Crowding. J Phys Chem Lett 2020; 11:1170-1177. [PMID: 31967479 DOI: 10.1021/acs.jpclett.9b03446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Understanding nanoscale protein conformational changes at solid-liquid interfaces is critical for predicting how proteins will impact the performance of biomaterials in vivo. Crowding is an important contributor to conformational stability. Here we apply single-molecule high resolution imaging with photobleaching to directly measure dye-conjugated fibronectin's unfolding in varying conditions of crowding with human serum albumin on aminosilanized glass. Using this approach, we identify serum albumin's crowding mechanism. We find that fibronectin achieves larger degrees of unfolding when not crowded by coadsorbed serum albumin. Serum albumin does not as effectively constrict fibronectin's conformation if it is sequentially, rather than simultaneously, introduced, suggesting that serum albumin's crowding mechanism is dependent on its ability to sterically block fibronectin's unfolding during the process of adsorption. Because fibronectin's conformation is dependent on interfacial macromolecular crowding under in vitro conditions, it is important to consider the role of in vivo crowding on protein activity.
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Grainger DW. Fluorinated Biomaterials. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00012-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Protein film formation on cell culture surfaces investigated by quartz crystal microbalance with dissipation monitoring and atomic force microscopy. Colloids Surf B Biointerfaces 2019; 183:110447. [DOI: 10.1016/j.colsurfb.2019.110447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 08/15/2019] [Accepted: 08/18/2019] [Indexed: 12/16/2022]
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Inukai N, Tanaka K, Takizawa T. A convenient technique for live-cell observation on the surface of polytetrafluoroethylene with a phase-contrast microscope. Microscopy (Oxf) 2017; 66:136-142. [PMID: 28423411 DOI: 10.1093/jmicro/dfw042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 09/02/2016] [Indexed: 11/14/2022] Open
Abstract
Phase-contrast microscopy is a convenient technique for live-cell observation on the surface of materials with high optical transmittance. Here, we demonstrate a novel technique to observe living cells on the surface of materials with low optical transmittance, such as polytetrafluoroethylene (PTFE), which are widely used in biomaterials for blood-contacting devices. The surface of a cover glass was coated with a thin PTFE layer with sufficient transmittance, thereby enabling the observation of living cells on the PTFE surface with a phase-contrast microscope.
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Affiliation(s)
- Naoto Inukai
- Graduate School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan.,Nihon Chemical Coat Co. Ltd., 8-17-25 Seishin, Chuo-ku, Sagamihara, Kanagawa 252-0216, Japan
| | - Kazuaki Tanaka
- Graduate School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Tatsuya Takizawa
- Graduate School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
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Valencia-Serna J, Chevallier P, KC RB, Laroche G, Uludağ H. Fibronectin-modified surfaces for evaluating the influence of cell adhesion on sensitivity of leukemic cells to siRNA nanoparticles. Nanomedicine (Lond) 2016; 11:1123-38. [DOI: 10.2217/nnm.16.32] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Aim: This study aimed to create fibronectin (FN)-grafted polymeric surfaces to investigate the influence of leukemic cell adhesion on siRNA treatment. Materials & methods: FN was grafted on plasma-treated PTFE surfaces using chemical crosslinkers. Adhesion and growth of chronic myeloid leukemia K562 cells on modified surfaces were investigated. The silencing effect of siRNA/lipid-polymers nanoparticles on cells grown on FN-grafted surfaces was evaluated. Results: Crosslinker-mediated immobilization showed significant FN grafting on surfaces, which provided K562 cell adhesion and growth advantage. siRNA nanoparticle silencing was similarly effective on FN-adhered and suspension-growing K562 cells. Conclusion: This study provided initial data to develop a cell-adhesive system to investigate therapeutic effects on leukemic cells. The response of chronic myeloid leukemia cells to siRNA nanoparticles was independent on cell attachment.
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Affiliation(s)
- Juliana Valencia-Serna
- Department of Biomedical Engineering, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta T6G 2V2, Canada
| | - Pascale Chevallier
- Département de génie des mines, de la métallurgie et des Matériaux & Centre de recherche du CHU de Québec, Université Laval, Québec, Québec G1L 3L5, Canada
| | - Remant Bahadur KC
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, Alberta T6G 2G6, Canada
| | - Gaétan Laroche
- Département de génie des mines, de la métallurgie et des Matériaux & Centre de recherche du CHU de Québec, Université Laval, Québec, Québec G1L 3L5, Canada
| | - Hasan Uludağ
- Department of Biomedical Engineering, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta T6G 2V2, Canada
- Department of Chemical & Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, Alberta T6G 2G6, Canada
- Faculty of Pharmacy & Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta T6G 2G6, Canada
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Djaker N, Brustlein S, Rohman G, Huot S, de la Chapelle ML, Migonney V. Characterization of a synthetic bioactive polymer by nonlinear optical microscopy. BIOMEDICAL OPTICS EXPRESS 2013; 5:149-57. [PMID: 24466483 PMCID: PMC3891327 DOI: 10.1364/boe.5.000149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/08/2013] [Accepted: 11/14/2013] [Indexed: 05/11/2023]
Abstract
Tissue Engineering is a new emerging field that offers many possibilities to produce three-dimensional and functional tissues like ligaments or scaffolds. The biocompatibility of these materials is crucial in tissue engineering, since they should be integrated in situ and should induce a good cell adhesion and proliferation. One of the most promising materials used for tissue engineering are polyesters such as Poly-ε-caprolactone (PCL), which is used in this work. In our case, the bio-integration is reached by grafting a bioactive polymer (pNaSS) on a PCL surface. Using nonlinear microscopy, PCL structure is visualized by SHG and proteins and cells by two-photon excitation autofluorescence generation. A comparative study between grafted and nongrafted polymer films is provided. We demonstrate that the polymer grafting improves the protein adsorption by a factor of 75% and increase the cell spreading onto the polymer surface. Since the spreading is directly related to cell adhesion and proliferation, we demonstrate that the pNaSS grafting promotes PCL biocompatibility.
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Affiliation(s)
- N. Djaker
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS (UMR 7244), 74 rue Marcel Cachin, 93017, Bobigny,
France
| | - S. Brustlein
- Institut Fresnel, MOSAIC, CNRS, Aix-Marseille Université, Ecole Centrale Marseille, Domaine Universitaire St Jérôme,
France
| | - G. Rohman
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS (UMR 7244), 99 avenue JB Clément, 93430, Villetaneuse,
France
| | - S. Huot
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS (UMR 7244), 99 avenue JB Clément, 93430, Villetaneuse,
France
| | - M. Lamy de la Chapelle
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS (UMR 7244), 74 rue Marcel Cachin, 93017, Bobigny,
France
| | - V. Migonney
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS (UMR 7244), 99 avenue JB Clément, 93430, Villetaneuse,
France
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11
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Liu F, Grainger DW. Fluorinated Biomaterials. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00011-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Lee TY, Chen WS, Huang YA, Liu TW, Hwang E, Tseng CP. Application of aurintricarboxylic acid for the adherence of mouse P19 neurons and primary hippocampal neurons to noncoated surface in serum-free culture. Biotechnol Prog 2012; 28:1566-74. [PMID: 23011767 DOI: 10.1002/btpr.1638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 08/08/2012] [Indexed: 02/01/2023]
Abstract
Dissociated primary neuron culture has been the most widely used model systems for neuroscience research. Most of these primary neurons are cultured on adhesion matrix-coated surface to provide a proper environment for cell anchorage under serum-free conditions. In this study, we provide an alternative technique to promote the adhesions of these neurons using aurintricarboxylic acid (ATA), a nonpeptide compound, without surface manipulations. We first demonstrated that ATA could promote Chinese hamster ovary cell attachment and proliferation in serum-free medium in a dosage-dependent manner. We later showed that ATA significantly enhanced the attachment of the retinoic acid differentiated P19 mouse embryonal carcinoma (P19) neurons, with an optimal concentration around 30 μg/mL. A similar result was seen in primary hippocampal neurons, with an optimal ATA concentration around 15 μg/mL. Further morphological assessments revealed that the average neurite length and neuronal polarization were almost identical to that obtained using a conventional method with poly-L-lysine surface. The advantages of using the ATA treatment technique for immunochemical analysis are discussed.
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Affiliation(s)
- Tsung-Yih Lee
- Dept. of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
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Tagaya M, Ikoma T, Hanagata N, Yoshioka T, Tanaka J. Competitive adsorption of fibronectin and albumin on hydroxyapatite nanocrystals. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2011; 12:034411. [PMID: 27877402 PMCID: PMC5090474 DOI: 10.1088/1468-6996/12/3/034411] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2010] [Revised: 06/16/2011] [Accepted: 04/24/2011] [Indexed: 06/06/2023]
Abstract
Competitive adsorption of two-component solutions containing fibronectin (Fn) and albumin (Ab) on hydroxyapatite (HAp) nanocrystals was analyzed in situ using the quartz crystal microbalance with dissipation (QCM-D) technique. Adsorption of the one-component protein (Fn or Ab) and the two-component proteins adjusted to different molar ratios of Fn to Ab at a fixed Fn concentration was investigated. The frequency shift (Δf; Hz) and the dissipation energy shift (ΔD) were measured with the QCM-D technique, and the viscoelastic changes of adlayers were evaluated by the saturated ΔD/Δf value and the Voigt-based viscoelastic model. For the adsorption of the one-component protein, the Fn adlayer showed a larger mass and higher viscoelasticity than the Ab adlayer, indicating the higher affinity of Fn on HAp. For the adsorption of the two-component proteins, the viscoelastic properties of the adlayers became elastic with increase in Ab concentration, whereas the adsorption mass was similar to that of Fn in the one-component solution regardless of the Ab concentration. The specific binding mass of the Ab antibody to the adlayers increased with increase in Ab concentration, whereas that of the Fn antibody decreased. Therefore, Fn preferentially adsorbs on HAp and Ab subsequently interacts with the adlayers, indicating that the interfacial viscoelasticity of the adlayers was dominated by the interaction between Fn and Ab.
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Affiliation(s)
- Motohiro Tagaya
- Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo 152-8550, Japan
- Biomaterials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
- Research Fellow of the Japan Society for the Promotion of Science, Tokyo, Japan
| | - Toshiyuki Ikoma
- Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo 152-8550, Japan
- Biomaterials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
| | - Nobutaka Hanagata
- Biomaterials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
| | - Tomohiko Yoshioka
- Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo 152-8550, Japan
| | - Junzo Tanaka
- Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Tokyo 152-8550, Japan
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Hindié M, Degat MC, Gaudière F, Gallet O, Van Tassel PR, Pauthe E. Pre-osteoblasts on poly(L-lactic acid) and silicon oxide: Influence of fibronectin and albumin adsorption. Acta Biomater 2011; 7:387-94. [PMID: 20692384 DOI: 10.1016/j.actbio.2010.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 06/22/2010] [Accepted: 08/03/2010] [Indexed: 11/17/2022]
Abstract
Cell adhesion and subsequent viability are critical initial steps in biomaterial-tissue integration and are strongly dependent on the material properties and the presence of matrix proteins. In the present study MC3T3-E1 osteoblast-like cell behavior on silicon oxide (SO) and poly(L-lactic acid) (PLLA) substrates has been examined, with a focus on the influence of the adhesive protein fibronectin and the non-adhesive protein albumin adsorbed on the substrates. Quartz crystal microgravimetry showed adsorption of fibronectin and albumin to be nearly identical on SO and PLLA. Subsequent exposure a previously adsorbed fibronectin layer to albumin decreased the rigidity of the adsorbed layer without any measurable increase in adsorbed mass. Cell adhesion and spreading were significantly enhanced on both SO and PLLA substrates coated with fibronectin or with fibronectin and albumin, compared with uncoated or albumin-coated substrates. The only statistically significant difference between the two substrates in these assays was increased spreading on PLLA compared with SO in the presence of fibronectin and albumin. Cell proliferation was significantly higher on SO compared with PLLA after 7 days culture, but depended on the presence of fibronectin only in the PLLA system. In contrast, mitochondrial activity was higher on PLLA than on SO, and was enhanced by fibronectin on both substrates. PLLA substrates coated with fibronectin and subsequently exposed to albumin exhibited the highest level of cell differentiation, as assayed via alkaline phosphatase activity. These results demonstrate the importance of adsorbed proteins on osteoblast-like cell-surface interactions.
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Affiliation(s)
- Mathilde Hindié
- ERRMECe, Université de Cergy-Pontoise, Site Saint-Martin, France
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15
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Collie AMB, Bota PCS, Johns RE, Maier RV, Stayton PS. Differential monocyte/macrophage interleukin-1β production due to biomaterial topography requires the β2 integrin signaling pathway. J Biomed Mater Res A 2010; 96:162-9. [DOI: 10.1002/jbm.a.32963] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 07/26/2010] [Accepted: 08/10/2010] [Indexed: 01/08/2023]
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16
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Jimbo R, Ivarsson M, Koskela A, Sul YT, Johansson CB. Protein adsorption to surface chemistry and crystal structure modification of titanium surfaces. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2010; 1:e3. [PMID: 24421973 PMCID: PMC3886052 DOI: 10.5037/jomr.2010.1303] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Accepted: 05/18/2010] [Indexed: 11/22/2022]
Abstract
Objectives To observe the early adsorption of extracellular matrix and blood plasma
proteins to magnesium-incorporated titanium oxide surfaces, which has shown
superior bone response in animal models. Material and Methods Commercially pure titanium discs were blasted with titanium dioxide
(TiO2) particles (control), and for the test group,
TiO2 blasted discs were further processed with a micro-arc
oxidation method (test). Surface morphology was investigated by scanning
electron microscopy, surface topography by optic interferometry,
characterization by X-ray photoelectron spectroscopy (XPS), and by X-ray
diffraction (XRD) analysis. The adsorption of 3 different proteins
(fibronectin, albumin, and collagen type I) was investigated by an
immunoblotting technique. Results The test surface showed a porous structure, whereas the control surface
showed a typical TiO2 blasted structure. XPS data revealed
magnesium-incorporation to the anodic oxide film of the surface. There was
no difference in surface roughness between the control and test surfaces.
For the protein adsorption test, the amount of albumin was significantly
higher on the control surface whereas the amount of fibronectin was
significantly higher on the test surface. Although there was no significant
difference, the test surface had a tendency to adsorb more collagen type
I. Conclusions The magnesium-incorporated anodized surface showed significantly higher
fibronectin adsorption and lower albumin adsorption than the blasted
surface. These results may be one of the reasons for the excellent bone
response previously observed in animal studies.
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Affiliation(s)
- Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University Malmö Sweden. ; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, Göteborg University Göteborg Sweden
| | - Mikael Ivarsson
- Clinical Research Center, Örebro University Hosptial Örebro Sweden
| | - Anita Koskela
- Clinical Research Center, Örebro University Hosptial Örebro Sweden
| | - Young-Taeg Sul
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, Göteborg University Göteborg Sweden. ; Institute for Clinical Dental Research, Korea University Seoul South Korea
| | - Carina B Johansson
- Department of Clinical Medicine, School of Health and Medical Sciences, Örebro University Örebro Sweden
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Van Vlierberghe S, Vanderleyden E, Dubruel P, De Vos F, Schacht E. Affinity Study of Novel Gelatin Cell Carriers for Fibronectin. Macromol Biosci 2009; 9:1105-15. [DOI: 10.1002/mabi.200900043] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Chen H, Song W, Zhou F, Wu Z, Huang H, Zhang J, Lin Q, Yang B. The effect of surface microtopography of poly(dimethylsiloxane) on protein adsorption, platelet and cell adhesion. Colloids Surf B Biointerfaces 2009; 71:275-81. [DOI: 10.1016/j.colsurfb.2009.02.018] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 02/16/2009] [Accepted: 02/19/2009] [Indexed: 11/26/2022]
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Godek ML, Michel R, Chamberlain LM, Castner DG, Grainger DW. Adsorbed serum albumin is permissive to macrophage attachment to perfluorocarbon polymer surfaces in culture. J Biomed Mater Res A 2009; 88:503-19. [PMID: 18306309 DOI: 10.1002/jbm.a.31886] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Monocyte/macrophage adhesion to biomaterials, correlated with foreign body response, occurs through protein-mediated surface interactions. Albumin-selective perfluorocarbon (FC) biomaterials are generally poorly cell-conducive because of insufficient receptor-mediated surface interactions, but macrophages bind to albumin-coated substrates and also preferentially to highly hydrophobic fluorinated surfaces. Bone marrow macrophages (BMMO) and IC-21, RAW 264.7, and J774A.1 monocyte/macrophage cells were cultured on FC surfaces. Protein deposition onto two distinct FC surfaces from complex and single-component solutions was tracked using fluorescence and time-of-flight secondary ion mass spectrometry (ToF-SIMS) methods. Cell adhesion and growth on protein pretreated substrates were compared by light microscopy. Flow cytometry and integrin-directed antibody receptor blocking were used to assess integrins critical for monocyte/macrophage adhesion in vitro. Albumin predominantly adsorbs onto both FC surfaces from 10% serum. In cultures preadsorbed with albumin or serum-dilutions, BMMO responded similar to IC-21 at early time points. Compared with Teflon AF, plasma-polymerized FC was less permissive to extended cell proliferation. The beta(2) integrins play major roles in macrophage adhesion to FC surfaces: antibody blocking significantly disrupted cell adhesion. Albumin-mediated cell adhesion mechanisms to FC surfaces could not be clarified. Primary BMMO and secondary IC-21 macrophages behave similarly on FC surfaces, regardless of preadsorbed protein biasing, with respect to adhesion, cell morphology, motility, and proliferation.
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Affiliation(s)
- M L Godek
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado 80523, USA
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20
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Vandencasteele N, Nisol B, Viville P, Lazzaroni R, Castner DG, Reniers F. Study of plasma modified-PTFE for biological applications: relationship between protein resistant properties, plasma treatment, surface composition and surface roughness. PLASMA PROCESSES AND POLYMERS (PRINT) 2008; 5:661-671. [PMID: 24795545 PMCID: PMC4007513 DOI: 10.1002/ppap.200700143] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
PTFE samples were treated by low-pressure, O2 RF plasmas. The adsorption of BSA was used as a probe for the protein resistant properties. The exposure of PTFE to an O2 plasma leads to an increase in the chamber pressure. OES reveals the presence of CO, CO2 and F in the gas phase, indicating a strong etching of the PTFE surface by the O2 plasma. Furthermore, the high resolution C1s spectrum shows the appearance of CF3, CF and C-CF components in addition to the CF2 component, which is consistent with etching of the PTFE surface. WCA as high as 160° were observed, indicating a superhydrophobic behaviour. AFM Images of surfaces treated at high plasma power showed a increase in roughness. Lower amounts of BSA adsorption were detected on high power, O2 plasma-modified PTFE samples compared to low power, oxygen plasma-modified ones.
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Affiliation(s)
- Nicolas Vandencasteele
- Université Libre de Bruxelles, Faculty of Sciences, Analytical and Interfacial Chemistry, cp 255, bld Triomphe 2, B-1050 Bruxelles, Belgium
| | - Bernard Nisol
- Université Libre de Bruxelles, Faculty of Sciences, Analytical and Interfacial Chemistry, cp 255, bld Triomphe 2, B-1050 Bruxelles, Belgium
| | - Pascal Viville
- Laboratory for Chemistry of NoVel Materials, Université de Mons-Hainaut/Materia NoVa, Place du Parc, 20, B-7000 Mons, Belgium
| | - Roberto Lazzaroni
- Laboratory for Chemistry of NoVel Materials, Université de Mons-Hainaut/Materia NoVa, Place du Parc, 20, B-7000 Mons, Belgium
| | - David G. Castner
- National ESCA and Surface Analysis Center for Biomedical Problems, Departments of Chemical Engineering and Bioengineering, University of Washington, Box 351750, Seattle, Washington 98195, USA
| | - François Reniers
- Université Libre de Bruxelles, Faculty of Sciences, Analytical and Interfacial Chemistry, cp 255, bld Triomphe 2, B-1050 Bruxelles, Belgium
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21
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UV-O3-treated and protein-coated polymer surfaces facilitate endothelial cell adhesion and proliferation mediated by the PKCα/ERK/cPLA2 pathway. Microvasc Res 2008; 75:330-42. [DOI: 10.1016/j.mvr.2007.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 10/02/2007] [Accepted: 11/26/2007] [Indexed: 12/29/2022]
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22
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Zhou J, Ciobanu M, Pavon-Djavid G, Gueguen V, Migonney V. Morphology and adhesion of human fibroblast cells cultured on bioactive polymer grafted ligament prosthesis. ACTA ACUST UNITED AC 2008; 2007:5115-8. [PMID: 18003157 DOI: 10.1109/iembs.2007.4353491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The anterior cruciate ligament (ACL) is the most important ligament for the knee stabilization. Unfortunately, it is also the most commonly injured. Synthetic polymers such as polyethylene terephthalate (PET) are widely used to fabricate ligament prostheses. In this study, we reported how to graft poly(sodium styrene sulfonate) (pNaSS) onto PET fabrics used to prepare ligament at a rate of about 4.5 x 10(-6) mol/g. In this study, we analyzed the morphology of human fibroblast MacCoy adhering onto the pNaSS grafted fabrics. Cell adhesion strength onto grafted and non grafted fabrics previously adsorbed with serum proteins was also evaluated after the application of shear stresses. Results showed that human fibroblast MacCoy adhered more strongly on the pNaSS grafted fabric compared to the non grafted one. The cell spreading is well on the grafted fiber even after the shear stress application: about 65% of cells remained adhered on the pNaSS grafted fabric as compared to 32% on the non grafted one. We concluded that Mac Coy human fibroblast cells strongly adhered onto the pNaSS functionalized PET prosthesis surface and showed a better spread cell morphology as well as a more homogeneous distribution than on the non grafted sample surfaces.
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Affiliation(s)
- J Zhou
- Laboratoire de Biomatériaux et Polymères de Spécialité, UMR7052, Institut Galilée, Université Paris, Nord, Av J-B Clément 93430 Villetaneuse, France
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23
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Sousa SR, Lamghari M, Sampaio P, Moradas-Ferreira P, Barbosa MA. Osteoblast adhesion and morphology on TiO2 depends on the competitive preadsorption of albumin and fibronectin. J Biomed Mater Res A 2008; 84:281-90. [PMID: 17607748 DOI: 10.1002/jbm.a.31201] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study aims at assessing the influence of the competitive preadsorption of human serum albumin (HSA) and human plasma fibronectin (FN) from binary solutions and 10% plasma on MC3T3-E1 osteoblast adhesion and morphology on two types of TiO2 substrates. One was commercially pure titanium with a titanium oxide layer formed in an H2O2 solution and the other TiO2 sputtered on Si (Sousa et al., Langmuir 2004; 20:9745-9754.). The strategy applied in the present investigation was to compare osteoblast adhesion to surfaces preadsorbed with HSA, FN, HSA/FN = 1, HSA/FN = 200, and 10% plasma. The adsorption of proteins was evaluated measuring the amount and the effectiveness of binding with radiolabeled proteins, 125 I-FN and 125 I-HSA. Our results indicated that MC3T3-E1 osteoblast adhesion correlates well with the amounts of FN and HSA adsorbed on TiO2 surfaces. Also, we found that fewer osteoblasts adhered to both substrates preadsorbed with HSA, HSA/FN = 200, and 10% plasma, after 4 and 24 h, than to the surfaces preadsorbed with FN and HSA/FN = 1. For the latter, FN was able to compensate the inhibitory effect of HSA on osteoblast adhesion. Therefore, the presence of lower amounts of coadsorbed albumin may improve presentation of FN in a more integrin-recognized conformation, suggesting that some degree of molecular packing prevents loss of integrin-binding activity. FN reversibility does not seem to be dependent on the HSA/FN adsorption mass ratio in solution, suggesting that FN competitively adsorbs to TiO2 in a favorable conformation and does not suffers subsequent conformational changes allowing exchange with other FN molecules in solution.
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Affiliation(s)
- S R Sousa
- INEB - Instituto de Engenharia Biomédica, Laboratório de Biomaterials, R. do Campo Alegre, 823, 4150-180 Porto, Portugal.
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24
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Anamelechi CC, Clermont EE, Brown MA, Truskey GA, Reichert WM. Streptavidin binding and endothelial cell adhesion to biotinylated fibronectin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:12583-12588. [PMID: 17985940 PMCID: PMC4070297 DOI: 10.1021/la702322n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A dual ligand (DL) system that combines high affinity streptavidin-biotin binding with lower affinity fibronectin-integrin ligand binding was developed to augment endothelial cell adhesion to polymers. In this study, we examined the utility of biotinylated fibronectin (bFN) as an enhancement to the previously developed DL approach. The goal was to make the system more amenable to clinical studies by eliminating xenogenic bovine serum albumin (bBSA). Fibronectin (FN) biotinylation was achieved with Sulfo-NHS-LC-Biotin. The affinity of conjugated biotin for wild-type streptavidin (WT-SA) and a mutant strain streptavidin (RGD-SA) was measured using surface plasmon resonance (SPR) spectroscopy. Enzyme-Linked ImmunoSorbent Assay (ELISA) absorbance values confirmed the accessibility of the cell binding domain on mildly biotinylated bFN when compared to unmodified native protein. SPR binding analysis confirmed similar binding behavior to bFN with WT-SA and RGD-SA. Kinetic analysis, however, showed no increase in affinity due to increased biotins per FN, an indication of the absence of positive cooperativity in the system. We verified the essential utility of bFN in affinity binding by SPR and confirmed the potential for integrin-FN linkages by ELISA. Finally, Vinculin immunostaining was used to determine focal adhesion formation using bFN in the DL system. Significantly greater focal adhesion density was achieved with the bFN in the DL system than with FN alone.
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25
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Vallières K, Petitclerc E, Laroche G. Covalent grafting of fibronectin onto plasma-treated PTFE: influence of the conjugation strategy on fibronectin biological activity. Macromol Biosci 2007; 7:738-45. [PMID: 17457945 DOI: 10.1002/mabi.200600267] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Surface coating of synthetic materials is often considered to improve biomedical devices biocompatibility. In this study, we covalently bound fibronectin (FN) onto ammonia plasma-treated PTFE via two crosslinkers, namely glutaric anhydride (GA) and sulfosuccinimidyl-4-(p-maleimidophenyl)butyrate (sulfo-SMPB). With respect to clean PTFE, cell adhesion increased markedly on both FN grafted surfaces, although it was twice higher on PTFE-GA-FN than on PTFE-SMPB-FN. ELISA experiments performed with a polyclonal antibody revealed that the amount of FN is identical on both surfaces while monoclonal antibody specific to the RGD binding site clearly demonstrated a greater availability when FN is surface grafted through GA. These results provide evidence of a variation in protein conformation correlated with the surface conjugation strategy.
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Affiliation(s)
- Karine Vallières
- Unité de Biotechnologie et de Bioingénierie, Centre de recherche du CHUQ, Hôpital Saint-François d'Assise, 10 rue de l'Espinay, Québec, Canada, G1L 3L5
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26
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Vallières K, Chevallier P, Sarra-Bournet C, Turgeon S, Laroche G. AFM imaging of immobilized fibronectin: does the surface conjugation scheme affect the protein orientation/conformation? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:9745-51. [PMID: 17705411 DOI: 10.1021/la701323q] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Covalent grafting of biomolecules could potentially improve the biocompatibility of materials. However, these molecules have to be grafted in an active conformation to play their biological roles. The present work aims at verifying if the surface conjugation scheme of fibronectin (FN) affects the protein orientation/conformation and activity. FN was grafted onto plasma-treated fused silica using two different crosslinkers, glutaric anhydride (GA) or sulfosuccinimidyl 4-(p-maleimidophenyl)butyrate (SMPB). Fused silica was chosen as a model surface material because it presents a roughness well below the dimensions of FN, therefore allowing AFM analyses with appropriate depth resolution. Cell adhesion assays were performed to evaluate the bioactivity of grafted FN. Cell adhesion was found to be higher on GA-FN than on SMPB-FN. Since FN-radiolabeling assays allowed us to rule out a surface concentration effect (approximately 80 ng/cm2 of FN on both crosslinkers), it was hypothesized that FN adopted a more active conformation when grafted via GA. In this context, the FN conformation on both crosslinkers was investigated through AFM and contact angle analyses. Before FN grafting, GA- and SMPB-modified surfaces had a similar water contact angle, topography, and roughness. However, water contact angles of GA-FN and SMPB-FN surfaces clearly show differences in surface hydrophilicity, therefore indicating a dependence of protein organization toward the conjugation strategy. Furthermore, AFM results demonstrated that surface topography and roughness of both FN-conjugated surfaces were significantly different. Distribution analysis of FN height and diameter confirmed this observation as the protein dimensions were significantly larger on GA than SMPB. This study confirmed that the covalent immobilization scheme of biomolecules influences their conformation and, hence, their activity. Consequently, selecting the appropriate conjugation strategy is of paramount importance in retaining molecule bioactivity.
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Affiliation(s)
- Karine Vallières
- Unité de Biotechnologie et de Bioingénierie, Centre de recherche du CHUQ, Hôpital Saint-François d'Assise, 10 rue de l'Espinay, Qué., Canada G1L 3L5
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27
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Zhou J, Pavon-Djavid G, Anagnostou F, Migonney V. Inhibition de l'adhérence de Porphyromonas gingivalis sur la surface de titane greffé de poly(styrène sulfonate de sodium). Ing Rech Biomed 2007. [DOI: 10.1016/j.rbmret.2007.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Godek ML, Malkov GS, Fisher ER, Grainger DW. Macrophage Serum-Based Adhesion to Plasma-Processed Surface Chemistry is Distinct from That Exhibited by Fibroblasts. PLASMA PROCESSES AND POLYMERS (PRINT) 2006; 3:485-497. [PMID: 17417668 PMCID: PMC1847953 DOI: 10.1002/ppap.200600007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Plasma-polymerized films deposited from AlAm, HxAm, NVP, NVFA, AA and FC were compared to TCPS and PS surfaces in supporting cellular attachment, viability, and proliferation in serum-based culture in vitro for extended periods of time (>7 d). Surface patterns were created using multi-step depositions with physical masks. Cell adhesion in the presence of serum was compared for (monocyte-) macrophage and fibroblast cell lines. Cellular response was tracked over time, reporting adhesive behavior, proliferative rates, and morphological changes as a function of surface chemistry. Micropatterned surfaces containing different surface chemistries and functional groups (e.g. -NH(2), -COOH, -CF(3)) produced differential cell adhesive patterns for NIH 3T3 fibroblasts compared to J774A.1, RAW 264.7 or IC-21 (monocyte-) macrophage cell types. Significantly, macrophage adhesion is substantial on surfaces where fibroblasts do not adhere under identical culture conditions.
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Affiliation(s)
- Marisha L Godek
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO 80523-1872, USA
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29
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Anamelechi CC, Truskey GA, Reichert WM. Mylar and Teflon-AF as cell culture substrates for studying endothelial cell adhesion. Biomaterials 2005; 26:6887-96. [PMID: 15990164 DOI: 10.1016/j.biomaterials.2005.04.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2004] [Accepted: 04/10/2005] [Indexed: 11/22/2022]
Abstract
The textured and opaque nature of Dacron and ePTFE has prevented the use of these fabrics in conventional cell culture techniques normally employed to optimize cell attachment and retention. This lack of optimization has led, in part, to the poor performance of endothelialization strategies for improving vascular graft patency. Here we show that thin, transparent films of Mylar and Teflon-AF are viable in vitro cell culture mimics of Dacron and ePTFE vascular graft materials, particularly for the study of protein mediated endothelial cell (EC) attachment, spreading and adhesion. Glass substrates were used as controls. X-ray photoelectron spectroscopy (XPS) and contact angle analysis showed that Mylar and Teflon-AF have surface chemistries that closely match Dacron and ePTFE. (125)I radiolabeling was used to quantify fibronectin (FN) adsorption, and FN and biotinylated-BSA "dual ligand" co-adsorption onto glass, Mylar and Teflon-AF substrates. Native human umbilical vein endothelial cells (HUVEC) and streptavidin-incubated biotinylated-HUVEC (SA-b-HUVEC) spreading was measured using phase contrast microscopy. Cell retention and adhesion was determined using phase contrast microscopy under laminar flow. All surfaces lacking protein pre-treatment, regardless of surface type, showed the lowest degree of cell spreading and retention. Dual ligand treated Mylar films showed significantly greater SA-b-HUVEC spreading up to 2 h, but were similar to HUVEC on FN treated Mylar at longer times; whereas SA-b-HUVEC spreading on dual ligand treated Teflon-AF was never significantly different from HUVEC on FN treated Teflon-AF at any time point. SA-b-HUVEC retention was significantly greater on dual ligand treated Mylar compared to HUVEC on FN treated Mylar over the entire range of shear stresses tested (3.54-28.3 dynes/cm(2)); whereas SA-b-HUVEC retention to dual ligand and HUVEC retention to FN treated Teflon-AF gave similar results at each shear stress, with only the mid-range of stresses showing significant difference in cell retention to Teflon-AF.
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Affiliation(s)
- Charles C Anamelechi
- Department of Biomedical Engineering, Duke University, Durham, NC 27708-0281, USA
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30
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Li M, Mills DK, Cui T, Mcshane MJ. Cellular Response to Gelatin- and Fibronectin-Coated Multilayer Polyelectrolyte Nanofilms. IEEE Trans Nanobioscience 2005; 4:170-9. [PMID: 16117025 DOI: 10.1109/tnb.2005.850477] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Surface engineering is a critical effort in defining substrates for cell culture and tissue engineering. In this context, multilayer self-assembly is an attractive method for creating novel composites with specialized chemical and physical properties that is currently drawing attention for potential application in this area. In this work, effects of thickness, surface roughness, and surface material of multilayer polymer nanofilms on the growth of rat aortic smooth muscle cells were studied. Polyelectrolyte multilayers (PEMs) electrostatically constructed from poly(allylamine hydrochloride) and poly(sodium 4-styrenesulfonate) (PSS) with gelatin, fibronectin, and PSS surface coatings were evaluated for interactions with smooth muscle cells (SMCs) in an in vitro environment. The results prove that PEMs terminated with cell-adhesive proteins promote the attachment and further growth of SMCs, and that this property is dependent upon the number of layers in the underlying multilayer film architecture. Cell roundness and number of pseudopodia were also influenced by the number of layers in the nanofilms. These findings are significant in that they demonstrate that both surface coatings and underlying architecture of nanofilms affect the morphology and growth of SMCs, which means additional degrees of freedom are available for design of biomaterials. This work supports the excellent potential of nanoassembled ultrathin films for biosurface engineering, and points to a novel perspective for controlling cell-material interaction that can lead to an elegant system for defining the extracellular in vitro environment.
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Affiliation(s)
- Mengyan Li
- Institute for Micromanufacturing, Ruston, LA 71272, USA
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31
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Calonder C, Matthew HWT, Van Tassel PR. Adsorbed layers of oriented fibronectin: A strategy to control cell-surface interactions. J Biomed Mater Res A 2005; 75:316-23. [PMID: 16059890 DOI: 10.1002/jbm.a.30417] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fibronectin (Fn) is a matrix protein known to induce cell attachment and spreading through its cell binding site and related synergy sites. Fn-coated surfaces are therefore useful in tissue engineering and other cell contacting applications, but a problem with many immobilization strategies is a random distribution of molecular orientations. We sought to control Fn orientation, and thus enhance the availability of its cell binding site, by immobilizing Fn via a carboxymethyl dextran layer onto which are chemically attached monoclonal antibodies specific to a region near to Fn's C terminus (and thus away from the cell binding site). Using optical waveguide lightmode spectroscopy, we show the presence of chemically coupled antibodies to yield a considerably denser and thicker Fn layer, consistent with a more vertically aligned protein. Human umbilical vein endothelial cells spread significantly faster, and in a more spherically symmetric way, on an oriented Fn layer (i.e., in the presence of immobilized monoclonal antibodies) as compared with a control Fn layer (i.e., in the absence of bound antibodies). However, we observe human umbilical vein endothelial cell spreading on the oriented Fn layer to be similar to that on a Fn layer in the absence of a carboxymethyl dextran layer, suggesting that although orienting Fn is a promising strategy, coupling strategies using linkers other than dextran may be needed.
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Affiliation(s)
- Claudio Calonder
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, USA
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32
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Toworfe GK, Composto RJ, Adams CS, Shapiro IM, Ducheyne P. Fibronectin adsorption on surface-activated poly(dimethylsiloxane) and its effect on cellular function. ACTA ACUST UNITED AC 2004; 71:449-61. [PMID: 15481053 DOI: 10.1002/jbm.a.30164] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This article reports that surface modification of poly(dimethylsiloxane) (PDMS) influences fibronectin (Fn) adsorption and enhances cell attachment. Controlled adsorption of Fn on chemically activated polymer substrates is known to influence cellular function. Thin films of PDMS were spun cast on silicon wafers to obtain homogeneous and molecularly smooth surfaces. The films were made hydrophilic by exposure to ultraviolet ozone activation (PDMS*). The films then were characterized by contact angle goniometry, ellipsometry, atomic force microscopy (AFM), Rutherford backscattering spectrometry and X-ray photoelectron spectroscopy. Contact angle measurements indicated higher hydrophobicity of the nonactivated PDMS substrates than PDMS*. AFM scans of the substrates indicated higher surface roughness of PDMS* (Ra = 0.55 nm) than PDMS (Ra = 0.25 nm). Although Fn surface density (Gamma) was slightly higher on PDMS than on PDMS*, due to hydrophobic interactions between substrate and Fn, cell function was greatly enhanced on the Fn-coated PDMS* (PDMS*-Fn) than on PDMS (PDMS-Fn). Higher attachment of MC3T3-E1 osteoblast-like cells was observed on PDMS*-Fn than on PDMS-Fn. Moreover, cell spreading and cytoskeleton organization after 72 h was clearly favored on the Fn-coated PDMS* surfaces.
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Affiliation(s)
- George K Toworfe
- Center for Bioactive Materials and Tissue Engineering, Department of Bioengineering, University of Pennsylvania School of Engineering and Applied Science, 120 Hayden Hall, 3320 Smith Walk, Philadelphia, Pennsylvania 19104-6392, USA.
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